diff options
Diffstat (limited to 'src/SFML/Graphics/SOIL')
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/all-wcprops | 53 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/entries | 300 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/format | 1 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/text-base/SOIL.c.svn-base | 145 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/text-base/SOIL.h.svn-base | 152 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/text-base/image_DXT.c.svn-base | 632 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/text-base/image_DXT.h.svn-base | 123 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/text-base/stb_image_aug.c.svn-base | 3382 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/text-base/stb_image_aug.h.svn-base | 329 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/text-base/stbi_DDS_aug.h.svn-base | 21 | ||||
| -rw-r--r-- | src/SFML/Graphics/SOIL/.svn/text-base/stbi_DDS_aug_c.h.svn-base | 507 |
11 files changed, 0 insertions, 5645 deletions
diff --git a/src/SFML/Graphics/SOIL/.svn/all-wcprops b/src/SFML/Graphics/SOIL/.svn/all-wcprops deleted file mode 100644 index 05df943..0000000 --- a/src/SFML/Graphics/SOIL/.svn/all-wcprops +++ /dev/null @@ -1,53 +0,0 @@ -K 25 -svn:wc:ra_dav:version-url -V 49 -/svnroot/sfml/!svn/ver/463/src/SFML/Graphics/SOIL -END -stbi_DDS_aug_c.h -K 25 -svn:wc:ra_dav:version-url -V 66 -/svnroot/sfml/!svn/ver/317/src/SFML/Graphics/SOIL/stbi_DDS_aug_c.h -END -image_DXT.c -K 25 -svn:wc:ra_dav:version-url -V 61 -/svnroot/sfml/!svn/ver/317/src/SFML/Graphics/SOIL/image_DXT.c -END -SOIL.c -K 25 -svn:wc:ra_dav:version-url -V 56 -/svnroot/sfml/!svn/ver/388/src/SFML/Graphics/SOIL/SOIL.c -END -image_DXT.h -K 25 -svn:wc:ra_dav:version-url -V 61 -/svnroot/sfml/!svn/ver/317/src/SFML/Graphics/SOIL/image_DXT.h -END -stb_image_aug.c -K 25 -svn:wc:ra_dav:version-url -V 65 -/svnroot/sfml/!svn/ver/463/src/SFML/Graphics/SOIL/stb_image_aug.c -END -SOIL.h -K 25 -svn:wc:ra_dav:version-url -V 56 -/svnroot/sfml/!svn/ver/317/src/SFML/Graphics/SOIL/SOIL.h -END -stb_image_aug.h -K 25 -svn:wc:ra_dav:version-url -V 65 -/svnroot/sfml/!svn/ver/413/src/SFML/Graphics/SOIL/stb_image_aug.h -END -stbi_DDS_aug.h -K 25 -svn:wc:ra_dav:version-url -V 64 -/svnroot/sfml/!svn/ver/388/src/SFML/Graphics/SOIL/stbi_DDS_aug.h -END diff --git a/src/SFML/Graphics/SOIL/.svn/entries b/src/SFML/Graphics/SOIL/.svn/entries deleted file mode 100644 index 9792555..0000000 --- a/src/SFML/Graphics/SOIL/.svn/entries +++ /dev/null @@ -1,300 +0,0 @@ -9 - -dir -915 -https://sfml.svn.sourceforge.net/svnroot/sfml/src/SFML/Graphics/SOIL -https://sfml.svn.sourceforge.net/svnroot/sfml - - - -2008-02-11T17:13:03.793496Z -463 -laurentgom - - -svn:special svn:externals svn:needs-lock - - - - - - - - - - - -4e206d99-4929-0410-ac5d-dfc041789085 - -stbi_DDS_aug_c.h -file - - - - -2008-11-01T16:23:34.000000Z -f0019ccfd8e6be88529093358773cbed -2007-11-08T13:03:32.162286Z -317 -laurentgom - - - - - - - - - - - - - - - - - - - - - -15139 - -image_DXT.c -file - - - - -2008-11-01T16:23:34.000000Z -17c68a9d609813be1b0f9776793b32bf -2007-11-08T13:03:32.162286Z -317 -laurentgom - - - - - - - - - - - - - - - - - - - - - -17181 - -SOIL.c -file - - - - -2008-11-01T16:23:34.000000Z -1d96e04b94942feec733d55a8eb25344 -2007-12-27T10:43:22.246191Z -388 -laurentgom - - - - - - - - - - - - - - - - - - - - - -2858 - -image_DXT.h -file - - - - -2008-11-01T16:23:34.000000Z -05ae2daca8f2b6e397a1ec027c5b9c06 -2007-11-08T13:03:32.162286Z -317 -laurentgom - - - - - - - - - - - - - - - - - - - - - -3212 - -stb_image_aug.c -file - - - - -2008-11-01T16:23:34.000000Z -0b5239ec20494b01d7bb774683573ba7 -2008-02-11T17:13:03.793496Z -463 -laurentgom - - - - - - - - - - - - - - - - - - - - - -106812 - -SOIL.h -file - - - - -2008-11-01T16:23:34.000000Z -11922af99dded757e7d11eb50657d658 -2007-11-08T13:03:32.162286Z -317 -laurentgom - - - - - - - - - - - - - - - - - - - - - -3775 - -stb_image_aug.h -file - - - - -2008-11-01T16:23:34.000000Z -3fc363619b92bdf5c5fb128a2fa6944b -2008-01-06T07:52:40.255525Z -413 -laurentgom - - - - - - - - - - - - - - - - - - - - - -14829 - -stbi_DDS_aug.h -file - - - - -2008-11-01T16:23:34.000000Z -773071f66528eef1b3218ac16056d717 -2007-12-27T10:43:22.246191Z -388 -laurentgom - - - - - - - - - - - - - - - - - - - - - -785 - diff --git a/src/SFML/Graphics/SOIL/.svn/format b/src/SFML/Graphics/SOIL/.svn/format deleted file mode 100644 index ec63514..0000000 --- a/src/SFML/Graphics/SOIL/.svn/format +++ /dev/null @@ -1 +0,0 @@ -9 diff --git a/src/SFML/Graphics/SOIL/.svn/text-base/SOIL.c.svn-base b/src/SFML/Graphics/SOIL/.svn/text-base/SOIL.c.svn-base deleted file mode 100644 index b46eccc..0000000 --- a/src/SFML/Graphics/SOIL/.svn/text-base/SOIL.c.svn-base +++ /dev/null @@ -1,145 +0,0 @@ -/*
- Jonathan Dummer
- 2007-07-26-10.36
-
- Simple OpenGL Image Library
-
- Public Domain
- using Sean Barret's stb_image as a base
-
- Thanks to:
- * Sean Barret - for the awesome stb_image
- * Dan Venkitachalam - for finding some non-compliant DDS files, and patching some explicit casts
- * everybody at gamedev.net
-*/
-
-#define SOIL_CHECK_FOR_GL_ERRORS 0
-
-#ifdef WIN32
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- #include <wingdi.h>
-#elif defined(__APPLE__) || defined(__APPLE_CC__)
- /* I can't test this Apple stuff! */
- #define APIENTRY
-#else
-#endif
-
-#include "SOIL.h"
-#include "stb_image_aug.h"
-#include "image_DXT.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-/* error reporting */
-char *result_string_pointer = "SOIL initialized";
-
-
-unsigned char*
- SOIL_load_image
- (
- const char *filename,
- int *width, int *height, int *channels,
- int force_channels
- )
-{
- unsigned char *result = stbi_load( (char*)filename,
- width, height, channels, force_channels );
- if( result == NULL )
- {
- result_string_pointer = stbi_failure_reason();
- } else
- {
- result_string_pointer = "Image loaded";
- }
- return result;
-}
-
-unsigned char*
- SOIL_load_image_from_memory
- (
- const unsigned char *const buffer,
- int buffer_length,
- int *width, int *height, int *channels,
- int force_channels
- )
-{
- unsigned char *result = stbi_load_from_memory(
- (stbi_uc *)buffer, buffer_length,
- width, height, channels,
- force_channels );
- if( result == NULL )
- {
- result_string_pointer = stbi_failure_reason();
- } else
- {
- result_string_pointer = "Image loaded from memory";
- }
- return result;
-}
-
-int
- SOIL_save_image
- (
- const char *filename,
- int image_type,
- int width, int height, int channels,
- const unsigned char *const data
- )
-{
- int save_result;
-
- /* error check */
- if( (width < 1) || (height < 1) ||
- (channels < 1) || (channels > 4) ||
- (data == NULL) ||
- (filename == NULL) )
- {
- return 0;
- }
- if( image_type == SOIL_SAVE_TYPE_BMP )
- {
- save_result = stbi_write_bmp( (char*)filename,
- width, height, channels, (void*)data );
- } else
- if( image_type == SOIL_SAVE_TYPE_TGA )
- {
- save_result = stbi_write_tga( (char*)filename,
- width, height, channels, (void*)data );
- } else
- if( image_type == SOIL_SAVE_TYPE_DDS )
- {
- save_result = save_image_as_DDS( (const char*)filename,
- width, height, channels, (const unsigned char *const)data );
- } else
- {
- save_result = 0;
- }
- if( save_result == 0 )
- {
- result_string_pointer = "Saving the image failed";
- } else
- {
- result_string_pointer = "Image saved";
- }
- return save_result;
-}
-
-void
- SOIL_free_image_data
- (
- unsigned char *img_data
- )
-{
- free( (void*)img_data );
-}
-
-const char*
- SOIL_last_result
- (
- void
- )
-{
- return result_string_pointer;
-}
diff --git a/src/SFML/Graphics/SOIL/.svn/text-base/SOIL.h.svn-base b/src/SFML/Graphics/SOIL/.svn/text-base/SOIL.h.svn-base deleted file mode 100644 index 22f2bdc..0000000 --- a/src/SFML/Graphics/SOIL/.svn/text-base/SOIL.h.svn-base +++ /dev/null @@ -1,152 +0,0 @@ -/**
- @mainpage SOIL
-
- Jonathan Dummer
- 2007-07-26-10.36
-
- Simple OpenGL Image Library
-
- A tiny c library for uploading images as
- textures into OpenGL. Also saving and
- loading of images is supported.
-
- I'm using Sean's Tool Box image loader as a base:
- http://www.nothings.org/
-
- I'm upgrading it to load TGA and DDS files, and a direct
- path for loading DDS files straight into OpenGL textures,
- when applicable.
-
- Image Formats:
- - BMP load & save
- - TGA load & save
- - DDS load & save
- - PNG load
- - JPG load
-
- OpenGL Texture Features:
- - resample to power-of-two sizes
- - MIPmap generation
- - compressed texture S3TC formats (if supported)
- - can pre-multiply alpha for you, for better compositing
- - can flip image about the y-axis (except pre-compressed DDS files)
-
- Thanks to:
- * Sean Barret - for the awesome stb_image
- * Dan Venkitachalam - for finding some non-compliant DDS files, and patching some explicit casts
- * everybody at gamedev.net
-**/
-
-#ifndef HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY
-#define HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- The format of images that may be loaded (force_channels).
- SOIL_LOAD_AUTO leaves the image in whatever format it was found.
- SOIL_LOAD_L forces the image to load as Luminous (greyscale)
- SOIL_LOAD_LA forces the image to load as Luminous with Alpha
- SOIL_LOAD_RGB forces the image to load as Red Green Blue
- SOIL_LOAD_RGBA forces the image to load as Red Green Blue Alpha
-**/
-enum
-{
- SOIL_LOAD_AUTO = 0,
- SOIL_LOAD_L = 1,
- SOIL_LOAD_LA = 2,
- SOIL_LOAD_RGB = 3,
- SOIL_LOAD_RGBA = 4
-};
-
-/**
- The types of images that may be saved.
- (TGA supports uncompressed RGB / RGBA)
- (BMP supports uncompressed RGB)
- (DDS supports DXT1 and DXT5)
-**/
-enum
-{
- SOIL_SAVE_TYPE_TGA = 0,
- SOIL_SAVE_TYPE_BMP = 1,
- SOIL_SAVE_TYPE_DDS = 2
-};
-
-/**
- Loads an image from disk into an array of unsigned chars.
- Note that *channels return the original channel count of the
- image. If force_channels was other than SOIL_LOAD_AUTO,
- the resulting image has force_channels, but *channels may be
- different (if the original image had a different channel
- count).
- \return 0 if failed, otherwise returns 1
-**/
-unsigned char*
- SOIL_load_image
- (
- const char *filename,
- int *width, int *height, int *channels,
- int force_channels
- );
-
-/**
- Loads an image from memory into an array of unsigned chars.
- Note that *channels return the original channel count of the
- image. If force_channels was other than SOIL_LOAD_AUTO,
- the resulting image has force_channels, but *channels may be
- different (if the original image had a different channel
- count).
- \return 0 if failed, otherwise returns 1
-**/
-unsigned char*
- SOIL_load_image_from_memory
- (
- const unsigned char *const buffer,
- int buffer_length,
- int *width, int *height, int *channels,
- int force_channels
- );
-
-/**
- Saves an image from an array of unsigned chars (RGBA) to disk
- \return 0 if failed, otherwise returns 1
-**/
-int
- SOIL_save_image
- (
- const char *filename,
- int image_type,
- int width, int height, int channels,
- const unsigned char *const data
- );
-
-/**
- Frees the image data (note, this is just C's "free()"...this function is
- present mostly so C++ programmers don't forget to use "free()" and call
- "delete []" instead [8^)
-**/
-void
- SOIL_free_image_data
- (
- unsigned char *img_data
- );
-
-/**
- This function resturn a pointer to a string describing the last thing
- that happened inside SOIL. It can be used to determine why an image
- failed to load.
-**/
-const char*
- SOIL_last_result
- (
- void
- );
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY */
diff --git a/src/SFML/Graphics/SOIL/.svn/text-base/image_DXT.c.svn-base b/src/SFML/Graphics/SOIL/.svn/text-base/image_DXT.c.svn-base deleted file mode 100644 index eb90be6..0000000 --- a/src/SFML/Graphics/SOIL/.svn/text-base/image_DXT.c.svn-base +++ /dev/null @@ -1,632 +0,0 @@ -/*
- Jonathan Dummer
- 2007-07-31-10.32
-
- simple DXT compression / decompression code
-
- public domain
-*/
-
-#include "image_DXT.h"
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-
-/* set this =1 if you want to use the covarince matrix method...
- which is better than my method of using standard deviations
- overall, except on the infintesimal chance that the power
- method fails for finding the largest eigenvector */
-#define USE_COV_MAT 1
-
-/********* Function Prototypes *********/
-/*
- Takes a 4x4 block of pixels and compresses it into 8 bytes
- in DXT1 format (color only, no alpha). Speed is valued
- over prettyness, at least for now.
-*/
-void compress_DDS_color_block(
- int channels,
- const unsigned char *const uncompressed,
- unsigned char compressed[8] );
-/*
- Takes a 4x4 block of pixels and compresses the alpha
- component it into 8 bytes for use in DXT5 DDS files.
- Speed is valued over prettyness, at least for now.
-*/
-void compress_DDS_alpha_block(
- const unsigned char *const uncompressed,
- unsigned char compressed[8] );
-
-/********* Actual Exposed Functions *********/
-int
- save_image_as_DDS
- (
- const char *filename,
- int width, int height, int channels,
- const unsigned char *const data
- )
-{
- /* variables */
- FILE *fout;
- unsigned char *DDS_data;
- DDS_header header;
- int DDS_size;
- /* error check */
- if( (NULL == filename) ||
- (width < 1) || (height < 1) ||
- (channels < 1) || (channels > 4) ||
- (data == NULL ) )
- {
- return 0;
- }
- /* Convert the image */
- if( (channels & 1) == 1 )
- {
- /* no alpha, just use DXT1 */
- DDS_data = convert_image_to_DXT1( data, width, height, channels, &DDS_size );
- } else
- {
- /* has alpha, so use DXT5 */
- DDS_data = convert_image_to_DXT5( data, width, height, channels, &DDS_size );
- }
- /* save it */
- memset( &header, 0, sizeof( DDS_header ) );
- header.dwMagic = ('D' << 0) | ('D' << 8) | ('S' << 16) | (' ' << 24);
- header.dwSize = 124;
- header.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT | DDSD_LINEARSIZE;
- header.dwWidth = width;
- header.dwHeight = height;
- header.dwPitchOrLinearSize = DDS_size;
- header.sPixelFormat.dwSize = 32;
- header.sPixelFormat.dwFlags = DDPF_FOURCC;
- if( (channels & 1) == 1 )
- {
- header.sPixelFormat.dwFourCC = ('D' << 0) | ('X' << 8) | ('T' << 16) | ('1' << 24);
- } else
- {
- header.sPixelFormat.dwFourCC = ('D' << 0) | ('X' << 8) | ('T' << 16) | ('5' << 24);
- }
- header.sCaps.dwCaps1 = DDSCAPS_TEXTURE;
- /* write it out */
- fout = fopen( filename, "wb");
- fwrite( &header, sizeof( DDS_header ), 1, fout );
- fwrite( DDS_data, 1, DDS_size, fout );
- fclose( fout );
- /* done */
- free( DDS_data );
- return 1;
-}
-
-unsigned char* convert_image_to_DXT1(
- const unsigned char *const uncompressed,
- int width, int height, int channels,
- int *out_size )
-{
- unsigned char *compressed;
- int i, j, x, y;
- unsigned char ublock[16*3];
- unsigned char cblock[8];
- int index = 0, chan_step = 1;
- int block_count = 0;
- /* error check */
- *out_size = 0;
- if( (width < 1) || (height < 1) ||
- (NULL == uncompressed) ||
- (channels < 1) || (channels > 4) )
- {
- return NULL;
- }
- /* for channels == 1 or 2, I do not step forward for R,G,B values */
- if( channels < 3 )
- {
- chan_step = 0;
- }
- /* get the RAM for the compressed image
- (8 bytes per 4x4 pixel block) */
- *out_size = ((width+3) >> 2) * ((height+3) >> 2) * 8;
- compressed = (unsigned char*)malloc( *out_size );
- /* go through each block */
- for( j = 0; j < height; j += 4 )
- {
- for( i = 0; i < width; i += 4 )
- {
- /* copy this block into a new one */
- int idx = 0;
- int mx = 4, my = 4;
- if( j+4 >= height )
- {
- my = height - j;
- }
- if( i+4 >= width )
- {
- mx = width - i;
- }
- for( y = 0; y < my; ++y )
- {
- for( x = 0; x < mx; ++x )
- {
- ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels];
- ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step];
- ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step+chan_step];
- }
- for( x = mx; x < 4; ++x )
- {
- ublock[idx++] = ublock[0];
- ublock[idx++] = ublock[1];
- ublock[idx++] = ublock[2];
- }
- }
- for( y = my; y < 4; ++y )
- {
- for( x = 0; x < 4; ++x )
- {
- ublock[idx++] = ublock[0];
- ublock[idx++] = ublock[1];
- ublock[idx++] = ublock[2];
- }
- }
- /* compress the block */
- ++block_count;
- compress_DDS_color_block( 3, ublock, cblock );
- /* copy the data from the block into the main block */
- for( x = 0; x < 8; ++x )
- {
- compressed[index++] = cblock[x];
- }
- }
- }
- return compressed;
-}
-
-unsigned char* convert_image_to_DXT5(
- const unsigned char *const uncompressed,
- int width, int height, int channels,
- int *out_size )
-{
- unsigned char *compressed;
- int i, j, x, y;
- unsigned char ublock[16*4];
- unsigned char cblock[8];
- int index = 0, chan_step = 1;
- int block_count = 0, has_alpha;
- /* error check */
- *out_size = 0;
- if( (width < 1) || (height < 1) ||
- (NULL == uncompressed) ||
- (channels < 1) || ( channels > 4) )
- {
- return NULL;
- }
- /* for channels == 1 or 2, I do not step forward for R,G,B vales */
- if( channels < 3 )
- {
- chan_step = 0;
- }
- /* # channels = 1 or 3 have no alpha, 2 & 4 do have alpha */
- has_alpha = 1 - (channels & 1);
- /* get the RAM for the compressed image
- (16 bytes per 4x4 pixel block) */
- *out_size = ((width+3) >> 2) * ((height+3) >> 2) * 16;
- compressed = (unsigned char*)malloc( *out_size );
- /* go through each block */
- for( j = 0; j < height; j += 4 )
- {
- for( i = 0; i < width; i += 4 )
- {
- /* local variables, and my block counter */
- int idx = 0;
- int mx = 4, my = 4;
- if( j+4 >= height )
- {
- my = height - j;
- }
- if( i+4 >= width )
- {
- mx = width - i;
- }
- for( y = 0; y < my; ++y )
- {
- for( x = 0; x < mx; ++x )
- {
- ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels];
- ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step];
- ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step+chan_step];
- ublock[idx++] =
- has_alpha * uncompressed[(j+y)*width*channels+(i+x)*channels+channels-1]
- + (1-has_alpha)*255;
- }
- for( x = mx; x < 4; ++x )
- {
- ublock[idx++] = ublock[0];
- ublock[idx++] = ublock[1];
- ublock[idx++] = ublock[2];
- ublock[idx++] = ublock[3];
- }
- }
- for( y = my; y < 4; ++y )
- {
- for( x = 0; x < 4; ++x )
- {
- ublock[idx++] = ublock[0];
- ublock[idx++] = ublock[1];
- ublock[idx++] = ublock[2];
- ublock[idx++] = ublock[3];
- }
- }
- /* now compress the alpha block */
- compress_DDS_alpha_block( ublock, cblock );
- /* copy the data from the compressed alpha block into the main buffer */
- for( x = 0; x < 8; ++x )
- {
- compressed[index++] = cblock[x];
- }
- /* then compress the color block */
- ++block_count;
- compress_DDS_color_block( 4, ublock, cblock );
- /* copy the data from the compressed color block into the main buffer */
- for( x = 0; x < 8; ++x )
- {
- compressed[index++] = cblock[x];
- }
- }
- }
- return compressed;
-}
-
-/********* Helper Functions *********/
-int convert_bit_range( int c, int from_bits, int to_bits )
-{
- int b = (1 << (from_bits - 1)) + c * ((1 << to_bits) - 1);
- return (b + (b >> from_bits)) >> from_bits;
-}
-
-int rgb_to_565( int r, int g, int b )
-{
- return
- (convert_bit_range( r, 8, 5 ) << 11) |
- (convert_bit_range( g, 8, 6 ) << 05) |
- (convert_bit_range( b, 8, 5 ) << 00);
-}
-
-void rgb_888_from_565( unsigned int c, int *r, int *g, int *b )
-{
- *r = convert_bit_range( (c >> 11) & 31, 5, 8 );
- *g = convert_bit_range( (c >> 05) & 63, 6, 8 );
- *b = convert_bit_range( (c >> 00) & 31, 5, 8 );
-}
-
-void compute_color_line_STDEV(
- const unsigned char *const uncompressed,
- int channels,
- float point[3], float direction[3] )
-{
- const float inv_16 = 1.0f / 16.0f;
- int i;
- float sum_r = 0.0f, sum_g = 0.0f, sum_b = 0.0f;
- float sum_rr = 0.0f, sum_gg = 0.0f, sum_bb = 0.0f;
- float sum_rg = 0.0f, sum_rb = 0.0f, sum_gb = 0.0f;
- /* calculate all data needed for the covariance matrix
- ( to compare with _rygdxt code) */
- for( i = 0; i < 16*channels; i += channels )
- {
- sum_r += uncompressed[i+0];
- sum_rr += uncompressed[i+0] * uncompressed[i+0];
- sum_g += uncompressed[i+1];
- sum_gg += uncompressed[i+1] * uncompressed[i+1];
- sum_b += uncompressed[i+2];
- sum_bb += uncompressed[i+2] * uncompressed[i+2];
- sum_rg += uncompressed[i+0] * uncompressed[i+1];
- sum_rb += uncompressed[i+0] * uncompressed[i+2];
- sum_gb += uncompressed[i+1] * uncompressed[i+2];
- }
- /* convert the sums to averages */
- sum_r *= inv_16;
- sum_g *= inv_16;
- sum_b *= inv_16;
- /* and convert the squares to the squares of the value - avg_value */
- sum_rr -= 16.0f * sum_r * sum_r;
- sum_gg -= 16.0f * sum_g * sum_g;
- sum_bb -= 16.0f * sum_b * sum_b;
- sum_rg -= 16.0f * sum_r * sum_g;
- sum_rb -= 16.0f * sum_r * sum_b;
- sum_gb -= 16.0f * sum_g * sum_b;
- /* the point on the color line is the average */
- point[0] = sum_r;
- point[1] = sum_g;
- point[2] = sum_b;
- #if USE_COV_MAT
- /*
- The following idea was from ryg.
- (https://mollyrocket.com/forums/viewtopic.php?t=392)
- The method worked great (less RMSE than mine) most of
- the time, but had some issues handling some simple
- boundary cases, like full green next to full red,
- which would generate a covariance matrix like this:
-
- | 1 -1 0 |
- | -1 1 0 |
- | 0 0 0 |
-
- For a given starting vector, the power method can
- generate all zeros! So no starting with {1,1,1}
- as I was doing! This kind of error is still a
- slight posibillity, but will be very rare.
- */
- /* use the covariance matrix directly
- (1st iteration, don't use all 1.0 values!) */
- sum_r = 1.0f;
- sum_g = 2.718281828f;
- sum_b = 3.141592654f;
- direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb;
- direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb;
- direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb;
- /* 2nd iteration, use results from the 1st guy */
- sum_r = direction[0];
- sum_g = direction[1];
- sum_b = direction[2];
- direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb;
- direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb;
- direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb;
- /* 3rd iteration, use results from the 2nd guy */
- sum_r = direction[0];
- sum_g = direction[1];
- sum_b = direction[2];
- direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb;
- direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb;
- direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb;
- #else
- /* use my standard deviation method
- (very robust, a tiny bit slower and less accurate) */
- direction[0] = sqrt( sum_rr );
- direction[1] = sqrt( sum_gg );
- direction[2] = sqrt( sum_bb );
- /* which has a greater component */
- if( sum_gg > sum_rr )
- {
- /* green has greater component, so base the other signs off of green */
- if( sum_rg < 0.0f )
- {
- direction[0] = -direction[0];
- }
- if( sum_gb < 0.0f )
- {
- direction[2] = -direction[2];
- }
- } else
- {
- /* red has a greater component */
- if( sum_rg < 0.0f )
- {
- direction[1] = -direction[1];
- }
- if( sum_rb < 0.0f )
- {
- direction[2] = -direction[2];
- }
- }
- #endif
-}
-
-void LSE_master_colors_max_min(
- int *cmax, int *cmin,
- int channels,
- const unsigned char *const uncompressed )
-{
- int i, j;
- /* the master colors */
- int c0[3], c1[3];
- /* used for fitting the line */
- float sum_x[] = { 0.0f, 0.0f, 0.0f };
- float sum_x2[] = { 0.0f, 0.0f, 0.0f };
- float dot_max = 1.0f, dot_min = -1.0f;
- float vec_len2 = 0.0f;
- float dot;
- /* error check */
- if( (channels < 3) || (channels > 4) )
- {
- return;
- }
- compute_color_line_STDEV( uncompressed, channels, sum_x, sum_x2 );
- vec_len2 = 1.0f / ( 0.00001f +
- sum_x2[0]*sum_x2[0] + sum_x2[1]*sum_x2[1] + sum_x2[2]*sum_x2[2] );
- /* finding the max and min vector values */
- dot_max =
- (
- sum_x2[0] * uncompressed[0] +
- sum_x2[1] * uncompressed[1] +
- sum_x2[2] * uncompressed[2]
- );
- dot_min = dot_max;
- for( i = 1; i < 16; ++i )
- {
- dot =
- (
- sum_x2[0] * uncompressed[i*channels+0] +
- sum_x2[1] * uncompressed[i*channels+1] +
- sum_x2[2] * uncompressed[i*channels+2]
- );
- if( dot < dot_min )
- {
- dot_min = dot;
- } else if( dot > dot_max )
- {
- dot_max = dot;
- }
- }
- /* and the offset (from the average location) */
- dot = sum_x2[0]*sum_x[0] + sum_x2[1]*sum_x[1] + sum_x2[2]*sum_x[2];
- dot_min -= dot;
- dot_max -= dot;
- /* post multiply by the scaling factor */
- dot_min *= vec_len2;
- dot_max *= vec_len2;
- /* OK, build the master colors */
- for( i = 0; i < 3; ++i )
- {
- /* color 0 */
- c0[i] = (int)(0.5f + sum_x[i] + dot_max * sum_x2[i]);
- if( c0[i] < 0 )
- {
- c0[i] = 0;
- } else if( c0[i] > 255 )
- {
- c0[i] = 255;
- }
- /* color 1 */
- c1[i] = (int)(0.5f + sum_x[i] + dot_min * sum_x2[i]);
- if( c1[i] < 0 )
- {
- c1[i] = 0;
- } else if( c1[i] > 255 )
- {
- c1[i] = 255;
- }
- }
- /* down_sample (with rounding?) */
- i = rgb_to_565( c0[0], c0[1], c0[2] );
- j = rgb_to_565( c1[0], c1[1], c1[2] );
- if( i > j )
- {
- *cmax = i;
- *cmin = j;
- } else
- {
- *cmax = j;
- *cmin = i;
- }
-}
-
-void
- compress_DDS_color_block
- (
- int channels,
- const unsigned char *const uncompressed,
- unsigned char compressed[8]
- )
-{
- /* variables */
- int i;
- int next_bit;
- int enc_c0, enc_c1;
- int c0[4], c1[4];
- float color_line[] = { 0.0f, 0.0f, 0.0f, 0.0f };
- float vec_len2 = 0.0f, dot_offset = 0.0f;
- /* stupid order */
- int swizzle4[] = { 0, 2, 3, 1 };
- /* get the master colors */
- LSE_master_colors_max_min( &enc_c0, &enc_c1, channels, uncompressed );
- /* store the 565 color 0 and color 1 */
- compressed[0] = (enc_c0 >> 0) & 255;
- compressed[1] = (enc_c0 >> 8) & 255;
- compressed[2] = (enc_c1 >> 0) & 255;
- compressed[3] = (enc_c1 >> 8) & 255;
- /* zero out the compressed data */
- compressed[4] = 0;
- compressed[5] = 0;
- compressed[6] = 0;
- compressed[7] = 0;
- /* reconstitute the master color vectors */
- rgb_888_from_565( enc_c0, &c0[0], &c0[1], &c0[2] );
- rgb_888_from_565( enc_c1, &c1[0], &c1[1], &c1[2] );
- /* the new vector */
- vec_len2 = 0.0f;
- for( i = 0; i < 3; ++i )
- {
- color_line[i] = (float)(c1[i] - c0[i]);
- vec_len2 += color_line[i] * color_line[i];
- }
- if( vec_len2 > 0.0f )
- {
- vec_len2 = 1.0f / vec_len2;
- }
- /* pre-proform the scaling */
- color_line[0] *= vec_len2;
- color_line[1] *= vec_len2;
- color_line[2] *= vec_len2;
- /* compute the offset (constant) portion of the dot product */
- dot_offset = color_line[0]*c0[0] + color_line[1]*c0[1] + color_line[2]*c0[2];
- /* store the rest of the bits */
- next_bit = 8*4;
- for( i = 0; i < 16; ++i )
- {
- /* find the dot product of this color, to place it on the line
- (should be [-1,1]) */
- int next_value = 0;
- float dot_product =
- color_line[0] * uncompressed[i*channels+0] +
- color_line[1] * uncompressed[i*channels+1] +
- color_line[2] * uncompressed[i*channels+2] -
- dot_offset;
- /* map to [0,3] */
- next_value = (int)( dot_product * 3.0f + 0.5f );
- if( next_value > 3 )
- {
- next_value = 3;
- } else if( next_value < 0 )
- {
- next_value = 0;
- }
- /* OK, store this value */
- compressed[next_bit >> 3] |= swizzle4[ next_value ] << (next_bit & 7);
- next_bit += 2;
- }
- /* done compressing to DXT1 */
-}
-
-void
- compress_DDS_alpha_block
- (
- const unsigned char *const uncompressed,
- unsigned char compressed[8]
- )
-{
- /* variables */
- int i;
- int next_bit;
- int a0, a1;
- float scale_me;
- /* stupid order */
- int swizzle8[] = { 1, 7, 6, 5, 4, 3, 2, 0 };
- /* get the alpha limits (a0 > a1) */
- a0 = a1 = uncompressed[3];
- for( i = 4+3; i < 16*4; i += 4 )
- {
- if( uncompressed[i] > a0 )
- {
- a0 = uncompressed[i];
- } else if( uncompressed[i] < a1 )
- {
- a1 = uncompressed[i];
- }
- }
- /* store those limits, and zero the rest of the compressed dataset */
- compressed[0] = a0;
- compressed[1] = a1;
- /* zero out the compressed data */
- compressed[2] = 0;
- compressed[3] = 0;
- compressed[4] = 0;
- compressed[5] = 0;
- compressed[6] = 0;
- compressed[7] = 0;
- /* store the all of the alpha values */
- next_bit = 8*2;
- scale_me = 7.9999f / (a0 - a1);
- for( i = 3; i < 16*4; i += 4 )
- {
- /* convert this alpha value to a 3 bit number */
- int svalue;
- int value = (int)((uncompressed[i] - a1) * scale_me);
- svalue = swizzle8[ value&7 ];
- /* OK, store this value, start with the 1st byte */
- compressed[next_bit >> 3] |= svalue << (next_bit & 7);
- if( (next_bit & 7) > 5 )
- {
- /* spans 2 bytes, fill in the start of the 2nd byte */
- compressed[1 + (next_bit >> 3)] |= svalue >> (8 - (next_bit & 7) );
- }
- next_bit += 3;
- }
- /* done compressing to DXT1 */
-}
diff --git a/src/SFML/Graphics/SOIL/.svn/text-base/image_DXT.h.svn-base b/src/SFML/Graphics/SOIL/.svn/text-base/image_DXT.h.svn-base deleted file mode 100644 index ce77164..0000000 --- a/src/SFML/Graphics/SOIL/.svn/text-base/image_DXT.h.svn-base +++ /dev/null @@ -1,123 +0,0 @@ -/*
- Jonathan Dummer
- 2007-07-31-10.32
-
- simple DXT compression / decompression code
-
- public domain
-*/
-
-#ifndef HEADER_IMAGE_DXT
-#define HEADER_IMAGE_DXT
-
-/**
- Converts an image from an array of unsigned chars (RGB or RGBA) to
- DXT1 or DXT5, then saves the converted image to disk.
- \return 0 if failed, otherwise returns 1
-**/
-int
-save_image_as_DDS
-(
- const char *filename,
- int width, int height, int channels,
- const unsigned char *const data
-);
-
-/**
- take an image and convert it to DXT1 (no alpha)
-**/
-unsigned char*
-convert_image_to_DXT1
-(
- const unsigned char *const uncompressed,
- int width, int height, int channels,
- int *out_size
-);
-
-/**
- take an image and convert it to DXT5 (with alpha)
-**/
-unsigned char*
-convert_image_to_DXT5
-(
- const unsigned char *const uncompressed,
- int width, int height, int channels,
- int *out_size
-);
-
-/** A bunch of DirectDraw Surface structures and flags **/
-typedef struct
-{
- unsigned int dwMagic;
- unsigned int dwSize;
- unsigned int dwFlags;
- unsigned int dwHeight;
- unsigned int dwWidth;
- unsigned int dwPitchOrLinearSize;
- unsigned int dwDepth;
- unsigned int dwMipMapCount;
- unsigned int dwReserved1[ 11 ];
-
- /* DDPIXELFORMAT */
- struct
- {
- unsigned int dwSize;
- unsigned int dwFlags;
- unsigned int dwFourCC;
- unsigned int dwRGBBitCount;
- unsigned int dwRBitMask;
- unsigned int dwGBitMask;
- unsigned int dwBBitMask;
- unsigned int dwAlphaBitMask;
- }
- sPixelFormat;
-
- /* DDCAPS2 */
- struct
- {
- unsigned int dwCaps1;
- unsigned int dwCaps2;
- unsigned int dwDDSX;
- unsigned int dwReserved;
- }
- sCaps;
- unsigned int dwReserved2;
-}
-DDS_header ;
-
-/* the following constants were copied directly off the MSDN website */
-
-/* The dwFlags member of the original DDSURFACEDESC2 structure
- can be set to one or more of the following values. */
-#define DDSD_CAPS 0x00000001
-#define DDSD_HEIGHT 0x00000002
-#define DDSD_WIDTH 0x00000004
-#define DDSD_PITCH 0x00000008
-#define DDSD_PIXELFORMAT 0x00001000
-#define DDSD_MIPMAPCOUNT 0x00020000
-#define DDSD_LINEARSIZE 0x00080000
-#define DDSD_DEPTH 0x00800000
-
-/* DirectDraw Pixel Format */
-#define DDPF_ALPHAPIXELS 0x00000001
-#define DDPF_FOURCC 0x00000004
-#define DDPF_RGB 0x00000040
-
-/* The dwCaps1 member of the DDSCAPS2 structure can be
- set to one or more of the following values. */
-#define DDSCAPS_COMPLEX 0x00000008
-#define DDSCAPS_TEXTURE 0x00001000
-#define DDSCAPS_MIPMAP 0x00400000
-
-/* The dwCaps2 member of the DDSCAPS2 structure can be
- set to one or more of the following values. */
-#define DDSCAPS2_CUBEMAP 0x00000200
-#define DDSCAPS2_CUBEMAP_POSITIVEX 0x00000400
-#define DDSCAPS2_CUBEMAP_NEGATIVEX 0x00000800
-#define DDSCAPS2_CUBEMAP_POSITIVEY 0x00001000
-#define DDSCAPS2_CUBEMAP_NEGATIVEY 0x00002000
-#define DDSCAPS2_CUBEMAP_POSITIVEZ 0x00004000
-#define DDSCAPS2_CUBEMAP_NEGATIVEZ 0x00008000
-#define DDSCAPS2_VOLUME 0x00200000
-
-#endif /* HEADER_IMAGE_DXT */
diff --git a/src/SFML/Graphics/SOIL/.svn/text-base/stb_image_aug.c.svn-base b/src/SFML/Graphics/SOIL/.svn/text-base/stb_image_aug.c.svn-base deleted file mode 100644 index c92f833..0000000 --- a/src/SFML/Graphics/SOIL/.svn/text-base/stb_image_aug.c.svn-base +++ /dev/null @@ -1,3382 +0,0 @@ -/* stbi-1.08 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c
- when you control the images you're loading
-
- QUICK NOTES:
- Primarily of interest to game developers and other people who can
- avoid problematic images and only need the trivial interface
-
- JPEG baseline (no JPEG progressive, no oddball channel decimations)
- PNG non-interlaced
- BMP non-1bpp, non-RLE
- TGA (not sure what subset, if a subset)
- PSD (composite view only, no extra channels)
- HDR (radiance rgbE format)
- writes BMP,TGA (define STBI_NO_WRITE to remove code)
- decoded from memory or through stdio FILE (define STBI_NO_STDIO to remove code)
-
- TODO:
- stbi_info_*
-
- history:
- 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz
- 1.07 attempt to fix C++ warning/errors again
- 1.06 attempt to fix C++ warning/errors again
- 1.05 fix TGA loading to return correct *comp and use good luminance calc
- 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free
- 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR
- 1.02 support for (subset of) HDR files, float interface for preferred access to them
- 1.01 fix bug: possible bug in handling right-side up bmps... not sure
- fix bug: the stbi_bmp_load() and stbi_tga_load() functions didn't work at all
- 1.00 interface to zlib that skips zlib header
- 0.99 correct handling of alpha in palette
- 0.98 TGA loader by lonesock; dynamically add loaders (untested)
- 0.97 jpeg errors on too large a file; also catch another malloc failure
- 0.96 fix detection of invalid v value - particleman@mollyrocket forum
- 0.95 during header scan, seek to markers in case of padding
- 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same
- 0.93 handle jpegtran output; verbose errors
- 0.92 read 4,8,16,24,32-bit BMP files of several formats
- 0.91 output 24-bit Windows 3.0 BMP files
- 0.90 fix a few more warnings; bump version number to approach 1.0
- 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd
- 0.60 fix compiling as c++
- 0.59 fix warnings: merge Dave Moore's -Wall fixes
- 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian
- 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less
- than 16 available
- 0.56 fix bug: zlib uncompressed mode len vs. nlen
- 0.55 fix bug: restart_interval not initialized to 0
- 0.54 allow NULL for 'int *comp'
- 0.53 fix bug in png 3->4; speedup png decoding
- 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments
- 0.51 obey req_comp requests, 1-component jpegs return as 1-component,
- on 'test' only check type, not whether we support this variant
-*/
-
-#include "stb_image_aug.h"
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif
-#include <stdlib.h>
-#include <memory.h>
-#include <assert.h>
-#include <stdarg.h>
-
-#ifndef _MSC_VER
-#define __forceinline
-#endif
-
-// implementation:
-typedef unsigned char uint8;
-typedef unsigned short uint16;
-typedef signed short int16;
-typedef unsigned int uint32;
-typedef signed int int32;
-typedef unsigned int uint;
-
-// should produce compiler error if size is wrong
-typedef unsigned char validate_uint32[sizeof(uint32)==4];
-
-#if defined(STBI_NO_STDIO) && !defined(STBI_NO_WRITE)
-#define STBI_NO_WRITE
-#endif
-
-#ifndef STBI_NO_DDS
-#include "stbi_DDS_aug.h"
-#endif
-
-// I (JLD) want full messages for SOIL
-//#define STBI_FAILURE_USERMSG 1
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Generic API that works on all image types
-//
-
-static char *failure_reason;
-
-char *stbi_failure_reason(void)
-{
- return failure_reason;
-}
-
-static int e(char *str)
-{
- failure_reason = str;
- return 0;
-}
-
-#ifdef STBI_NO_FAILURE_STRINGS
- #define e(x,y) 0
-#elif defined(STBI_FAILURE_USERMSG)
- #define e(x,y) e(y)
-#else
- #define e(x,y) e(x)
-#endif
-
-#define epf(x,y) ((float *) (e(x,y)?NULL:NULL))
-#define epuc(x,y) ((unsigned char *) (e(x,y)?NULL:NULL))
-
-void stbi_image_free(void *retval_from_stbi_load)
-{
- free(retval_from_stbi_load);
-}
-
-#define MAX_LOADERS 32
-stbi_loader *loaders[MAX_LOADERS];
-static int max_loaders = 0;
-
-int stbi_register_loader(stbi_loader *loader)
-{
- int i;
- for (i=0; i < MAX_LOADERS; ++i) {
- // already present?
- if (loaders[i] == loader)
- return 1;
- // end of the list?
- if (loaders[i] == NULL) {
- loaders[i] = loader;
- max_loaders = i+1;
- return 1;
- }
- }
- // no room for it
- return 0;
-}
-
-#ifndef STBI_NO_HDR
-static float *ldr_to_hdr(stbi_uc *data, int x, int y, int comp);
-static stbi_uc *hdr_to_ldr(float *data, int x, int y, int comp);
-#endif
-
-#ifndef STBI_NO_STDIO
-unsigned char *stbi_load(char *filename, int *x, int *y, int *comp, int req_comp)
-{
- FILE *f = fopen(filename, "rb");
- unsigned char *result;
- if (!f) return epuc("can't fopen", "Unable to open file");
- result = stbi_load_from_file(f,x,y,comp,req_comp);
- fclose(f);
- return result;
-}
-
-unsigned char *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- int i;
- if (stbi_jpeg_test_file(f))
- return stbi_jpeg_load_from_file(f,x,y,comp,req_comp);
- if (stbi_png_test_file(f))
- return stbi_png_load_from_file(f,x,y,comp,req_comp);
- if (stbi_bmp_test_file(f))
- return stbi_bmp_load_from_file(f,x,y,comp,req_comp);
- if (stbi_psd_test_file(f))
- return stbi_psd_load_from_file(f,x,y,comp,req_comp);
- #ifndef STBI_NO_DDS
- if (stbi_dds_test_file(f))
- return stbi_dds_load_from_file(f,x,y,comp,req_comp);
- #endif
- #ifndef STBI_NO_HDR
- if (stbi_hdr_test_file(f)) {
- float *hdr = stbi_hdr_load_from_file(f, x,y,comp,req_comp);
- return hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
- }
- #endif
- for (i=0; i < max_loaders; ++i)
- if (loaders[i]->test_file(f))
- return loaders[i]->load_from_file(f,x,y,comp,req_comp);
- // test tga last because it's a crappy test!
- if (stbi_tga_test_file(f))
- return stbi_tga_load_from_file(f,x,y,comp,req_comp);
- return epuc("unknown image type", "Image not of any known type, or corrupt");
-}
-#endif
-
-unsigned char *stbi_load_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- int i;
- if (stbi_jpeg_test_memory(buffer,len))
- return stbi_jpeg_load_from_memory(buffer,len,x,y,comp,req_comp);
- if (stbi_png_test_memory(buffer,len))
- return stbi_png_load_from_memory(buffer,len,x,y,comp,req_comp);
- if (stbi_bmp_test_memory(buffer,len))
- return stbi_bmp_load_from_memory(buffer,len,x,y,comp,req_comp);
- if (stbi_psd_test_memory(buffer,len))
- return stbi_psd_load_from_memory(buffer,len,x,y,comp,req_comp);
- #ifndef STBI_NO_DDS
- if (stbi_dds_test_memory(buffer,len))
- return stbi_dds_load_from_memory(buffer,len,x,y,comp,req_comp);
- #endif
- #ifndef STBI_NO_HDR
- if (stbi_hdr_test_memory(buffer, len)) {
- float *hdr = stbi_hdr_load_from_memory(buffer, len,x,y,comp,req_comp);
- return hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
- }
- #endif
- for (i=0; i < max_loaders; ++i)
- if (loaders[i]->test_memory(buffer,len))
- return loaders[i]->load_from_memory(buffer,len,x,y,comp,req_comp);
- // test tga last because it's a crappy test!
- if (stbi_tga_test_memory(buffer,len))
- return stbi_tga_load_from_memory(buffer,len,x,y,comp,req_comp);
- return epuc("unknown image type", "Image not of any known type, or corrupt");
-}
-
-#ifndef STBI_NO_HDR
-
-#ifndef STBI_NO_STDIO
-float *stbi_loadf(char *filename, int *x, int *y, int *comp, int req_comp)
-{
- FILE *f = fopen(filename, "rb");
- float *result;
- if (!f) return epf("can't fopen", "Unable to open file");
- result = stbi_loadf_from_file(f,x,y,comp,req_comp);
- fclose(f);
- return result;
-}
-
-float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- unsigned char *data;
- #ifndef STBI_NO_HDR
- if (stbi_hdr_test_file(f))
- return stbi_hdr_load_from_file(f,x,y,comp,req_comp);
- #endif
- data = stbi_load_from_file(f, x, y, comp, req_comp);
- if (data)
- return ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
- return epf("unknown image type", "Image not of any known type, or corrupt");
-}
-#endif
-
-float *stbi_loadf_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- stbi_uc *data;
- #ifndef STBI_NO_HDR
- if (stbi_hdr_test_memory(buffer, len))
- return stbi_hdr_load_from_memory(buffer, len,x,y,comp,req_comp);
- #endif
- data = stbi_load_from_memory(buffer, len, x, y, comp, req_comp);
- if (data)
- return ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
- return epf("unknown image type", "Image not of any known type, or corrupt");
-}
-#endif
-
-// these is-hdr-or-not is defined independent of whether STBI_NO_HDR is
-// defined, for API simplicity; if STBI_NO_HDR is defined, it always
-// reports false!
-
-extern int stbi_is_hdr_from_memory(stbi_uc *buffer, int len)
-{
- #ifndef STBI_NO_HDR
- return stbi_hdr_test_memory(buffer, len);
- #else
- return 0;
- #endif
-}
-
-#ifndef STBI_NO_STDIO
-extern int stbi_is_hdr (char *filename)
-{
- FILE *f = fopen(filename, "rb");
- int result=0;
- if (f) {
- result = stbi_is_hdr_from_file(f);
- fclose(f);
- }
- return result;
-}
-
-extern int stbi_is_hdr_from_file(FILE *f)
-{
- #ifndef STBI_NO_HDR
- return stbi_hdr_test_file(f);
- #else
- return 0;
- #endif
-}
-
-#endif
-
-// @TODO: get image dimensions & components without fully decoding
-#ifndef STBI_NO_STDIO
-extern int stbi_info (char *filename, int *x, int *y, int *comp);
-extern int stbi_info_from_file (FILE *f, int *x, int *y, int *comp);
-#endif
-extern int stbi_info_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp);
-
-#ifndef STBI_NO_HDR
-static float h2l_gamma_i=1.0f/2.2f, h2l_scale_i=1.0f;
-static float l2h_gamma=2.2f, l2h_scale=1.0f;
-
-void stbi_hdr_to_ldr_gamma(float gamma) { h2l_gamma_i = 1/gamma; }
-void stbi_hdr_to_ldr_scale(float scale) { h2l_scale_i = 1/scale; }
-
-void stbi_ldr_to_hdr_gamma(float gamma) { l2h_gamma = gamma; }
-void stbi_ldr_to_hdr_scale(float scale) { l2h_scale = scale; }
-#endif
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Common code used by all image loaders
-//
-
-// image width, height, # components
-static uint32 img_x, img_y;
-static int img_n, img_out_n;
-
-enum
-{
- SCAN_load=0,
- SCAN_type,
- SCAN_header,
-};
-
-// An API for reading either from memory or file.
-#ifndef STBI_NO_STDIO
-static FILE *img_file;
-#endif
-static uint8 *img_buffer, *img_buffer_end;
-
-#ifndef STBI_NO_STDIO
-static void start_file(FILE *f)
-{
- img_file = f;
-}
-#endif
-
-static void start_mem(uint8 *buffer, int len)
-{
-#ifndef STBI_NO_STDIO
- img_file = NULL;
-#endif
- img_buffer = buffer;
- img_buffer_end = buffer+len;
-}
-
-static int get8(void)
-{
-#ifndef STBI_NO_STDIO
- if (img_file) {
- int c = fgetc(img_file);
- return c == EOF ? 0 : c;
- }
-#endif
- if (img_buffer < img_buffer_end)
- return *img_buffer++;
- return 0;
-}
-
-static int at_eof(void)
-{
-#ifndef STBI_NO_STDIO
- if (img_file)
- return feof(img_file);
-#endif
- return img_buffer >= img_buffer_end;
-}
-
-static uint8 get8u(void)
-{
- return (uint8) get8();
-}
-
-static void skip(int n)
-{
-#ifndef STBI_NO_STDIO
- if (img_file)
- fseek(img_file, n, SEEK_CUR);
- else
-#endif
- img_buffer += n;
-}
-
-static int get16(void)
-{
- int z = get8();
- return (z << 8) + get8();
-}
-
-static uint32 get32(void)
-{
- uint32 z = get16();
- return (z << 16) + get16();
-}
-
-static int get16le(void)
-{
- int z = get8();
- return z + (get8() << 8);
-}
-
-static uint32 get32le(void)
-{
- uint32 z = get16le();
- return z + (get16le() << 16);
-}
-
-static void getn(stbi_uc *buffer, int n)
-{
-#ifndef STBI_NO_STDIO
- if (img_file) {
- fread(buffer, 1, n, img_file);
- return;
- }
-#endif
- memcpy(buffer, img_buffer, n);
- img_buffer += n;
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// generic converter from built-in img_n to req_comp
-// individual types do this automatically as much as possible (e.g. jpeg
-// does all cases internally since it needs to colorspace convert anyway,
-// and it never has alpha, so very few cases ). png can automatically
-// interleave an alpha=255 channel, but falls back to this for other cases
-//
-// assume data buffer is malloced, so malloc a new one and free that one
-// only failure mode is malloc failing
-
-static uint8 compute_y(int r, int g, int b)
-{
- return (uint8) (((r*77) + (g*150) + (29*b)) >> 8);
-}
-
-static unsigned char *convert_format(unsigned char *data, int img_n, int req_comp)
-{
- uint i,j;
- unsigned char *good;
-
- if (req_comp == img_n) return data;
- assert(req_comp >= 1 && req_comp <= 4);
-
- good = (unsigned char *) malloc(req_comp * img_x * img_y);
- if (good == NULL) {
- free(data);
- return epuc("outofmem", "Out of memory");
- }
-
- for (j=0; j < img_y; ++j) {
- unsigned char *src = data + j * img_x * img_n ;
- unsigned char *dest = good + j * img_x * req_comp;
-
- #define COMBO(a,b) ((a)*8+(b))
- #define CASE(a,b) case COMBO(a,b): for(i=0; i < img_x; ++i, src += a, dest += b)
-
- // convert source image with img_n components to one with req_comp components;
- // avoid switch per pixel, so use switch per scanline and massive macros
- switch(COMBO(img_n, req_comp)) {
- CASE(1,2) dest[0]=src[0], dest[1]=255; break;
- CASE(1,3) dest[0]=dest[1]=dest[2]=src[0]; break;
- CASE(1,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=255; break;
- CASE(2,1) dest[0]=src[0]; break;
- CASE(2,3) dest[0]=dest[1]=dest[2]=src[0]; break;
- CASE(2,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; break;
- CASE(3,4) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=255; break;
- CASE(3,1) dest[0]=compute_y(src[0],src[1],src[2]); break;
- CASE(3,2) dest[0]=compute_y(src[0],src[1],src[2]), dest[1] = 255; break;
- CASE(4,1) dest[0]=compute_y(src[0],src[1],src[2]); break;
- CASE(4,2) dest[0]=compute_y(src[0],src[1],src[2]), dest[1] = src[3]; break;
- CASE(4,3) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; break;
- default: assert(0);
- }
- #undef CASE
- }
-
- free(data);
- img_out_n = req_comp;
- return good;
-}
-
-#ifndef STBI_NO_HDR
-static float *ldr_to_hdr(stbi_uc *data, int x, int y, int comp)
-{
- int i,k,n;
- float *output = (float *) malloc(x * y * comp * sizeof(float));
- if (output == NULL) { free(data); return epf("outofmem", "Out of memory"); }
- // compute number of non-alpha components
- if (comp & 1) n = comp; else n = comp-1;
- for (i=0; i < x*y; ++i) {
- for (k=0; k < n; ++k) {
- output[i*comp + k] = (float) pow(data[i*comp+k]/255.0f, l2h_gamma) * l2h_scale;
- }
- if (k < comp) output[i*comp + k] = data[i*comp+k]/255.0f;
- }
- free(data);
- return output;
-}
-
-#define float2int(x) ((int) (x))
-static stbi_uc *hdr_to_ldr(float *data, int x, int y, int comp)
-{
- int i,k,n;
- stbi_uc *output = (stbi_uc *) malloc(x * y * comp);
- if (output == NULL) { free(data); return epuc("outofmem", "Out of memory"); }
- // compute number of non-alpha components
- if (comp & 1) n = comp; else n = comp-1;
- for (i=0; i < x*y; ++i) {
- for (k=0; k < n; ++k) {
- float z = (float) pow(data[i*comp+k]*h2l_scale_i, h2l_gamma_i) * 255 + 0.5f;
- if (z < 0) z = 0;
- if (z > 255) z = 255;
- output[i*comp + k] = float2int(z);
- }
- if (k < comp) {
- float z = data[i*comp+k] * 255 + 0.5f;
- if (z < 0) z = 0;
- if (z > 255) z = 255;
- output[i*comp + k] = float2int(z);
- }
- }
- free(data);
- return output;
-}
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// "baseline" JPEG/JFIF decoder (not actually fully baseline implementation)
-//
-// simple implementation
-// - channel subsampling of at most 2 in each dimension
-// - doesn't support delayed output of y-dimension
-// - simple interface (only one output format: 8-bit interleaved RGB)
-// - doesn't try to recover corrupt jpegs
-// - doesn't allow partial loading, loading multiple at once
-// - still fast on x86 (copying globals into locals doesn't help x86)
-// - allocates lots of intermediate memory (full size of all components)
-// - non-interleaved case requires this anyway
-// - allows good upsampling (see next)
-// high-quality
-// - upsampled channels are bilinearly interpolated, even across blocks
-// - quality integer IDCT derived from IJG's 'slow'
-// performance
-// - fast huffman; reasonable integer IDCT
-// - uses a lot of intermediate memory, could cache poorly
-// - load http://nothings.org/remote/anemones.jpg 3 times on 2.8Ghz P4
-// stb_jpeg: 1.34 seconds (MSVC6, default release build)
-// stb_jpeg: 1.06 seconds (MSVC6, processor = Pentium Pro)
-// IJL11.dll: 1.08 seconds (compiled by intel)
-// IJG 1998: 0.98 seconds (MSVC6, makefile provided by IJG)
-// IJG 1998: 0.95 seconds (MSVC6, makefile + proc=PPro)
-
-int stbi_jpeg_dc_only;
-
-// huffman decoding acceleration
-#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache
-
-typedef struct
-{
- uint8 fast[1 << FAST_BITS];
- // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
- uint16 code[256];
- uint8 values[256];
- uint8 size[257];
- unsigned int maxcode[18];
- int delta[17]; // old 'firstsymbol' - old 'firstcode'
-} huffman;
-
-static huffman huff_dc[4]; // baseline is 2 tables, extended is 4
-static huffman huff_ac[4];
-static uint8 dequant[4][64];
-
-static int build_huffman(huffman *h, int *count)
-{
- int i,j,k=0,code;
- // build size list for each symbol (from JPEG spec)
- for (i=0; i < 16; ++i)
- for (j=0; j < count[i]; ++j)
- h->size[k++] = (uint8) (i+1);
- h->size[k] = 0;
-
- // compute actual symbols (from jpeg spec)
- code = 0;
- k = 0;
- for(j=1; j <= 16; ++j) {
- // compute delta to add to code to compute symbol id
- h->delta[j] = k - code;
- if (h->size[k] == j) {
- while (h->size[k] == j)
- h->code[k++] = (uint16) (code++);
- if (code-1 >= (1 << j)) return e("bad code lengths","Corrupt JPEG");
- }
- // compute largest code + 1 for this size, preshifted as needed later
- h->maxcode[j] = code << (16-j);
- code <<= 1;
- }
- h->maxcode[j] = 0xffffffff;
-
- // build non-spec acceleration table; 255 is flag for not-accelerated
- memset(h->fast, 255, 1 << FAST_BITS);
- for (i=0; i < k; ++i) {
- int s = h->size[i];
- if (s <= FAST_BITS) {
- int c = h->code[i] << (FAST_BITS-s);
- int m = 1 << (FAST_BITS-s);
- for (j=0; j < m; ++j) {
- h->fast[c+j] = (uint8) i;
- }
- }
- }
- return 1;
-}
-
-// sizes for components, interleaved MCUs
-static int img_h_max, img_v_max;
-static int img_mcu_x, img_mcu_y;
-static int img_mcu_w, img_mcu_h;
-
-// definition of jpeg image component
-static struct
-{
- int id;
- int h,v;
- int tq;
- int hd,ha;
- int dc_pred;
-
- int x,y,w2,h2;
- uint8 *data;
-} img_comp[4];
-
-static uint32 code_buffer; // jpeg entropy-coded buffer
-static int code_bits; // number of valid bits
-static unsigned char marker; // marker seen while filling entropy buffer
-static int nomore; // flag if we saw a marker so must stop
-
-static void grow_buffer_unsafe(void)
-{
- do {
- int b = nomore ? 0 : get8();
- if (b == 0xff) {
- int c = get8();
- if (c != 0) {
- marker = (unsigned char) c;
- nomore = 1;
- return;
- }
- }
- code_buffer = (code_buffer << 8) | b;
- code_bits += 8;
- } while (code_bits <= 24);
-}
-
-// (1 << n) - 1
-static uint32 bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535};
-
-// decode a jpeg huffman value from the bitstream
-__forceinline static int decode(huffman *h)
-{
- unsigned int temp;
- int c,k;
-
- if (code_bits < 16) grow_buffer_unsafe();
-
- // look at the top FAST_BITS and determine what symbol ID it is,
- // if the code is <= FAST_BITS
- c = (code_buffer >> (code_bits - FAST_BITS)) & ((1 << FAST_BITS)-1);
- k = h->fast[c];
- if (k < 255) {
- if (h->size[k] > code_bits)
- return -1;
- code_bits -= h->size[k];
- return h->values[k];
- }
-
- // naive test is to shift the code_buffer down so k bits are
- // valid, then test against maxcode. To speed this up, we've
- // preshifted maxcode left so that it has (16-k) 0s at the
- // end; in other words, regardless of the number of bits, it
- // wants to be compared against something shifted to have 16;
- // that way we don't need to shift inside the loop.
- if (code_bits < 16)
- temp = (code_buffer << (16 - code_bits)) & 0xffff;
- else
- temp = (code_buffer >> (code_bits - 16)) & 0xffff;
- for (k=FAST_BITS+1 ; ; ++k)
- if (temp < h->maxcode[k])
- break;
- if (k == 17) {
- // error! code not found
- code_bits -= 16;
- return -1;
- }
-
- if (k > code_bits)
- return -1;
-
- // convert the huffman code to the symbol id
- c = ((code_buffer >> (code_bits - k)) & bmask[k]) + h->delta[k];
- assert((((code_buffer) >> (code_bits - h->size[c])) & bmask[h->size[c]]) == h->code[c]);
-
- // convert the id to a symbol
- code_bits -= k;
- return h->values[c];
-}
-
-// combined JPEG 'receive' and JPEG 'extend', since baseline
-// always extends everything it receives.
-__forceinline static int extend_receive(int n)
-{
- unsigned int m = 1 << (n-1);
- unsigned int k;
- if (code_bits < n) grow_buffer_unsafe();
- k = (code_buffer >> (code_bits - n)) & bmask[n];
- code_bits -= n;
- // the following test is probably a random branch that won't
- // predict well. I tried to table accelerate it but failed.
- // maybe it's compiling as a conditional move?
- if (k < m)
- return (-1 << n) + k + 1;
- else
- return k;
-}
-
-// given a value that's at position X in the zigzag stream,
-// where does it appear in the 8x8 matrix coded as row-major?
-static uint8 dezigzag[64+15] =
-{
- 0, 1, 8, 16, 9, 2, 3, 10,
- 17, 24, 32, 25, 18, 11, 4, 5,
- 12, 19, 26, 33, 40, 48, 41, 34,
- 27, 20, 13, 6, 7, 14, 21, 28,
- 35, 42, 49, 56, 57, 50, 43, 36,
- 29, 22, 15, 23, 30, 37, 44, 51,
- 58, 59, 52, 45, 38, 31, 39, 46,
- 53, 60, 61, 54, 47, 55, 62, 63,
- // let corrupt input sample past end
- 63, 63, 63, 63, 63, 63, 63, 63,
- 63, 63, 63, 63, 63, 63, 63
-};
-
-// decode one 64-entry block--
-static int decode_block(short data[64], huffman *hdc, huffman *hac, int b)
-{
- int diff,dc,k;
- int t = decode(hdc);
- if (t < 0) return e("bad huffman code","Corrupt JPEG");
-
- // 0 all the ac values now so we can do it 32-bits at a time
- memset(data,0,64*sizeof(data[0]));
-
- diff = t ? extend_receive(t) : 0;
- dc = img_comp[b].dc_pred + diff;
- img_comp[b].dc_pred = dc;
- data[0] = (short) dc;
-
- // decode AC components, see JPEG spec
- k = 1;
- do {
- int r,s;
- int rs = decode(hac);
- if (rs < 0) return e("bad huffman code","Corrupt JPEG");
- s = rs & 15;
- r = rs >> 4;
- if (s == 0) {
- if (rs != 0xf0) break; // end block
- k += 16;
- } else {
- k += r;
- // decode into unzigzag'd location
- data[dezigzag[k++]] = (short) extend_receive(s);
- }
- } while (k < 64);
- return 1;
-}
-
-// take a -128..127 value and clamp it and convert to 0..255
-__forceinline static uint8 clamp(int x)
-{
- x += 128;
- // trick to use a single test to catch both cases
- if ((unsigned int) x > 255) {
- if (x < 0) return 0;
- if (x > 255) return 255;
- }
- return (uint8) x;
-}
-
-#define f2f(x) (int) (((x) * 4096 + 0.5))
-#define fsh(x) ((x) << 12)
-
-// derived from jidctint -- DCT_ISLOW
-#define IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \
- int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \
- p2 = s2; \
- p3 = s6; \
- p1 = (p2+p3) * f2f(0.5411961f); \
- t2 = p1 + p3*f2f(-1.847759065f); \
- t3 = p1 + p2*f2f( 0.765366865f); \
- p2 = s0; \
- p3 = s4; \
- t0 = fsh(p2+p3); \
- t1 = fsh(p2-p3); \
- x0 = t0+t3; \
- x3 = t0-t3; \
- x1 = t1+t2; \
- x2 = t1-t2; \
- t0 = s7; \
- t1 = s5; \
- t2 = s3; \
- t3 = s1; \
- p3 = t0+t2; \
- p4 = t1+t3; \
- p1 = t0+t3; \
- p2 = t1+t2; \
- p5 = (p3+p4)*f2f( 1.175875602f); \
- t0 = t0*f2f( 0.298631336f); \
- t1 = t1*f2f( 2.053119869f); \
- t2 = t2*f2f( 3.072711026f); \
- t3 = t3*f2f( 1.501321110f); \
- p1 = p5 + p1*f2f(-0.899976223f); \
- p2 = p5 + p2*f2f(-2.562915447f); \
- p3 = p3*f2f(-1.961570560f); \
- p4 = p4*f2f(-0.390180644f); \
- t3 += p1+p4; \
- t2 += p2+p3; \
- t1 += p2+p4; \
- t0 += p1+p3;
-
-// .344 seconds on 3*anemones.jpg
-static void idct_block(uint8 *out, int out_stride, short data[64], uint8 *dequantize)
-{
- int i,val[64],*v=val;
- uint8 *o,*dq = dequantize;
- short *d = data;
-
- if (stbi_jpeg_dc_only) {
- // ok, I don't really know why this is right, but it seems to be:
- int z = 128 + ((d[0] * dq[0]) >> 3);
- for (i=0; i < 8; ++i) {
- out[0] = out[1] = out[2] = out[3] = out[4] = out[5] = out[6] = out[7] = z;
- out += out_stride;
- }
- return;
- }
-
- // columns
- for (i=0; i < 8; ++i,++d,++dq, ++v) {
- // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
- if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0
- && d[40]==0 && d[48]==0 && d[56]==0) {
- // no shortcut 0 seconds
- // (1|2|3|4|5|6|7)==0 0 seconds
- // all separate -0.047 seconds
- // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds
- int dcterm = d[0] * dq[0] << 2;
- v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
- } else {
- IDCT_1D(d[ 0]*dq[ 0],d[ 8]*dq[ 8],d[16]*dq[16],d[24]*dq[24],
- d[32]*dq[32],d[40]*dq[40],d[48]*dq[48],d[56]*dq[56])
- // constants scaled things up by 1<<12; let's bring them back
- // down, but keep 2 extra bits of precision
- x0 += 512; x1 += 512; x2 += 512; x3 += 512;
- v[ 0] = (x0+t3) >> 10;
- v[56] = (x0-t3) >> 10;
- v[ 8] = (x1+t2) >> 10;
- v[48] = (x1-t2) >> 10;
- v[16] = (x2+t1) >> 10;
- v[40] = (x2-t1) >> 10;
- v[24] = (x3+t0) >> 10;
- v[32] = (x3-t0) >> 10;
- }
- }
-
- for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) {
- // no fast case since the first 1D IDCT spread components out
- IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7])
- // constants scaled things up by 1<<12, plus we had 1<<2 from first
- // loop, plus horizontal and vertical each scale by sqrt(8) so together
- // we've got an extra 1<<3, so 1<<17 total we need to remove.
- x0 += 65536; x1 += 65536; x2 += 65536; x3 += 65536;
- o[0] = clamp((x0+t3) >> 17);
- o[7] = clamp((x0-t3) >> 17);
- o[1] = clamp((x1+t2) >> 17);
- o[6] = clamp((x1-t2) >> 17);
- o[2] = clamp((x2+t1) >> 17);
- o[5] = clamp((x2-t1) >> 17);
- o[3] = clamp((x3+t0) >> 17);
- o[4] = clamp((x3-t0) >> 17);
- }
-}
-
-#define MARKER_none 0xff
-// if there's a pending marker from the entropy stream, return that
-// otherwise, fetch from the stream and get a marker. if there's no
-// marker, return 0xff, which is never a valid marker value
-static uint8 get_marker(void)
-{
- uint8 x;
- if (marker != MARKER_none) { x = marker; marker = MARKER_none; return x; }
- x = get8u();
- if (x != 0xff) return MARKER_none;
- while (x == 0xff)
- x = get8u();
- return x;
-}
-
-// in each scan, we'll have scan_n components, and the order
-// of the components is specified by order[]
-static int scan_n, order[4];
-static int restart_interval, todo;
-#define RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7)
-
-// after a restart interval, reset the entropy decoder and
-// the dc prediction
-static void reset(void)
-{
- code_bits = 0;
- code_buffer = 0;
- nomore = 0;
- img_comp[0].dc_pred = img_comp[1].dc_pred = img_comp[2].dc_pred = 0;
- marker = MARKER_none;
- todo = restart_interval ? restart_interval : 0x7fffffff;
- // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
- // since we don't even allow 1<<30 pixels
-}
-
-static int parse_entropy_coded_data(void)
-{
- reset();
- if (scan_n == 1) {
- int i,j;
- short data[64];
- int n = order[0];
- // non-interleaved data, we just need to process one block at a time,
- // in trivial scanline order
- // number of blocks to do just depends on how many actual "pixels" this
- // component has, independent of interleaved MCU blocking and such
- int w = (img_comp[n].x+7) >> 3;
- int h = (img_comp[n].y+7) >> 3;
- for (j=0; j < h; ++j) {
- for (i=0; i < w; ++i) {
- if (!decode_block(data, huff_dc+img_comp[n].hd, huff_ac+img_comp[n].ha, n)) return 0;
- idct_block(img_comp[n].data+img_comp[n].w2*j*8+i*8, img_comp[n].w2, data, dequant[img_comp[n].tq]);
- // every data block is an MCU, so countdown the restart interval
- if (--todo <= 0) {
- if (code_bits < 24) grow_buffer_unsafe();
- // if it's NOT a restart, then just bail, so we get corrupt data
- // rather than no data
- if (!RESTART(marker)) return 1;
- reset();
- }
- }
- }
- } else { // interleaved!
- int i,j,k,x,y;
- short data[64];
- for (j=0; j < img_mcu_y; ++j) {
- for (i=0; i < img_mcu_x; ++i) {
- // scan an interleaved mcu... process scan_n components in order
- for (k=0; k < scan_n; ++k) {
- int n = order[k];
- // scan out an mcu's worth of this component; that's just determined
- // by the basic H and V specified for the component
- for (y=0; y < img_comp[n].v; ++y) {
- for (x=0; x < img_comp[n].h; ++x) {
- int x2 = (i*img_comp[n].h + x)*8;
- int y2 = (j*img_comp[n].v + y)*8;
- if (!decode_block(data, huff_dc+img_comp[n].hd, huff_ac+img_comp[n].ha, n)) return 0;
- idct_block(img_comp[n].data+img_comp[n].w2*y2+x2, img_comp[n].w2, data, dequant[img_comp[n].tq]);
- }
- }
- }
- // after all interleaved components, that's an interleaved MCU,
- // so now count down the restart interval
- if (--todo <= 0) {
- if (code_bits < 24) grow_buffer_unsafe();
- // if it's NOT a restart, then just bail, so we get corrupt data
- // rather than no data
- if (!RESTART(marker)) return 1;
- reset();
- }
- }
- }
- }
- return 1;
-}
-
-static int process_marker(int m)
-{
- int L;
- switch (m) {
- case MARKER_none: // no marker found
- return e("expected marker","Corrupt JPEG");
-
- case 0xC2: // SOF - progressive
- return e("progressive jpeg","JPEG format not supported (progressive)");
-
- case 0xDD: // DRI - specify restart interval
- if (get16() != 4) return e("bad DRI len","Corrupt JPEG");
- restart_interval = get16();
- return 1;
-
- case 0xDB: // DQT - define quantization table
- L = get16()-2;
- while (L > 0) {
- int z = get8();
- int p = z >> 4;
- int t = z & 15,i;
- if (p != 0) return e("bad DQT type","Corrupt JPEG");
- if (t > 3) return e("bad DQT table","Corrupt JPEG");
- for (i=0; i < 64; ++i)
- dequant[t][dezigzag[i]] = get8u();
- L -= 65;
- }
- return L==0;
-
- case 0xC4: // DHT - define huffman table
- L = get16()-2;
- while (L > 0) {
- uint8 *v;
- int sizes[16],i,m=0;
- int z = get8();
- int tc = z >> 4;
- int th = z & 15;
- if (tc > 1 || th > 3) return e("bad DHT header","Corrupt JPEG");
- for (i=0; i < 16; ++i) {
- sizes[i] = get8();
- m += sizes[i];
- }
- L -= 17;
- if (tc == 0) {
- if (!build_huffman(huff_dc+th, sizes)) return 0;
- v = huff_dc[th].values;
- } else {
- if (!build_huffman(huff_ac+th, sizes)) return 0;
- v = huff_ac[th].values;
- }
- for (i=0; i < m; ++i)
- v[i] = get8u();
- L -= m;
- }
- return L==0;
- }
- // check for comment block or APP blocks
- if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
- skip(get16()-2);
- return 1;
- }
- return 0;
-}
-
-// after we see SOS
-static int process_scan_header(void)
-{
- int i;
- int Ls = get16();
- scan_n = get8();
- if (scan_n < 1 || scan_n > 4 || scan_n > (int) img_n) return e("bad SOS component count","Corrupt JPEG");
- if (Ls != 6+2*scan_n) return e("bad SOS len","Corrupt JPEG");
- for (i=0; i < scan_n; ++i) {
- int id = get8(), which;
- int z = get8();
- for (which = 0; which < img_n; ++which)
- if (img_comp[which].id == id)
- break;
- if (which == img_n) return 0;
- img_comp[which].hd = z >> 4; if (img_comp[which].hd > 3) return e("bad DC huff","Corrupt JPEG");
- img_comp[which].ha = z & 15; if (img_comp[which].ha > 3) return e("bad AC huff","Corrupt JPEG");
- order[i] = which;
- }
- if (get8() != 0) return e("bad SOS","Corrupt JPEG");
- get8(); // should be 63, but might be 0
- if (get8() != 0) return e("bad SOS","Corrupt JPEG");
-
- return 1;
-}
-
-static int process_frame_header(int scan)
-{
- int Lf,p,i,z, h_max=1,v_max=1;
- Lf = get16(); if (Lf < 11) return e("bad SOF len","Corrupt JPEG"); // JPEG
- p = get8(); if (p != 8) return e("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline
- img_y = get16(); if (img_y == 0) return e("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG
- img_x = get16(); if (img_x == 0) return e("0 width","Corrupt JPEG"); // JPEG requires
- img_n = get8();
- if (img_n != 3 && img_n != 1) return e("bad component count","Corrupt JPEG"); // JFIF requires
-
- if (Lf != 8+3*img_n) return e("bad SOF len","Corrupt JPEG");
-
- for (i=0; i < img_n; ++i) {
- img_comp[i].id = get8();
- if (img_comp[i].id != i+1) // JFIF requires
- if (img_comp[i].id != i) // jpegtran outputs non-JFIF-compliant files!
- return e("bad component ID","Corrupt JPEG");
- z = get8();
- img_comp[i].h = (z >> 4); if (!img_comp[i].h || img_comp[i].h > 4) return e("bad H","Corrupt JPEG");
- img_comp[i].v = z & 15; if (!img_comp[i].v || img_comp[i].v > 4) return e("bad V","Corrupt JPEG");
- img_comp[i].tq = get8(); if (img_comp[i].tq > 3) return e("bad TQ","Corrupt JPEG");
- }
-
- if (scan != SCAN_load) return 1;
-
- if ((1 << 30) / img_x / img_n < img_y) return e("too large", "Image too large to decode");
-
- for (i=0; i < img_n; ++i) {
- if (img_comp[i].h > h_max) h_max = img_comp[i].h;
- if (img_comp[i].v > v_max) v_max = img_comp[i].v;
- }
-
- // compute interleaved mcu info
- img_h_max = h_max;
- img_v_max = v_max;
- img_mcu_w = h_max * 8;
- img_mcu_h = v_max * 8;
- img_mcu_x = (img_x + img_mcu_w-1) / img_mcu_w;
- img_mcu_y = (img_y + img_mcu_h-1) / img_mcu_h;
-
- for (i=0; i < img_n; ++i) {
- // number of effective pixels (e.g. for non-interleaved MCU)
- img_comp[i].x = (img_x * img_comp[i].h + h_max-1) / h_max;
- img_comp[i].y = (img_y * img_comp[i].v + v_max-1) / v_max;
- // to simplify generation, we'll allocate enough memory to decode
- // the bogus oversized data from using interleaved MCUs and their
- // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
- // discard the extra data until colorspace conversion
- img_comp[i].w2 = img_mcu_x * img_comp[i].h * 8;
- img_comp[i].h2 = img_mcu_y * img_comp[i].v * 8;
- img_comp[i].data = (uint8 *) malloc(img_comp[i].w2 * img_comp[i].h2);
- if (img_comp[i].data == NULL) {
- for(--i; i >= 0; --i)
- free(img_comp[i].data);
- return e("outofmem", "Out of memory");
- }
- }
-
- return 1;
-}
-
-// use comparisons since in some cases we handle more than one case (e.g. SOF)
-#define DNL(x) ((x) == 0xdc)
-#define SOI(x) ((x) == 0xd8)
-#define EOI(x) ((x) == 0xd9)
-#define SOF(x) ((x) == 0xc0 || (x) == 0xc1)
-#define SOS(x) ((x) == 0xda)
-
-static int decode_jpeg_header(int scan)
-{
- int m;
- marker = MARKER_none; // initialize cached marker to empty
- m = get_marker();
- if (!SOI(m)) return e("no SOI","Corrupt JPEG");
- if (scan == SCAN_type) return 1;
- m = get_marker();
- while (!SOF(m)) {
- if (!process_marker(m)) return 0;
- m = get_marker();
- while (m == MARKER_none) {
- // some files have extra padding after their blocks, so ok, we'll scan
- if (at_eof()) return e("no SOF", "Corrupt JPEG");
- m = get_marker();
- }
- }
- if (!process_frame_header(scan)) return 0;
- return 1;
-}
-
-static int decode_jpeg_image(void)
-{
- int m;
- restart_interval = 0;
- if (!decode_jpeg_header(SCAN_load)) return 0;
- m = get_marker();
- while (!EOI(m)) {
- if (SOS(m)) {
- if (!process_scan_header()) return 0;
- if (!parse_entropy_coded_data()) return 0;
- } else {
- if (!process_marker(m)) return 0;
- }
- m = get_marker();
- }
- return 1;
-}
-
-// static jfif-centered resampling with cross-block smoothing
-// here by cross-block smoothing what I mean is that the resampling
-// is bilerp and crosses blocks; I dunno what IJG means
-
-#define div4(x) ((uint8) ((x) >> 2))
-
-static void resample_v_2(uint8 *out1, uint8 *input, int w, int h, int s)
-{
- // need to generate two samples vertically for every one in input
- uint8 *above;
- uint8 *below;
- uint8 *source;
- uint8 *out2;
- int i,j;
- source = input;
- out2 = out1+w;
- for (j=0; j < h; ++j) {
- above = source;
- source = input + j*s;
- below = source + s; if (j == h-1) below = source;
- for (i=0; i < w; ++i) {
- int n = source[i]*3;
- out1[i] = div4(above[i] + n);
- out2[i] = div4(below[i] + n);
- }
- out1 += w*2;
- out2 += w*2;
- }
-}
-
-static void resample_h_2(uint8 *out, uint8 *input, int w, int h, int s)
-{
- // need to generate two samples horizontally for every one in input
- int i,j;
- if (w == 1) {
- for (j=0; j < h; ++j)
- out[j*2+0] = out[j*2+1] = input[j*s];
- return;
- }
- for (j=0; j < h; ++j) {
- out[0] = input[0];
- out[1] = div4(input[0]*3 + input[1]);
- for (i=1; i < w-1; ++i) {
- int n = input[i]*3;
- out[i*2-2] = div4(input[i-1] + n);
- out[i*2-1] = div4(input[i+1] + n);
- }
- out[w*2-2] = div4(input[w-2]*3 + input[w-1]);
- out[w*2-1] = input[w-1];
- out += w*2;
- input += s;
- }
-}
-
-// .172 seconds on 3*anemones.jpg
-static void resample_hv_2(uint8 *out, uint8 *input, int w, int h, int s)
-{
- // need to generate 2x2 samples for every one in input
- int i,j;
- int os = w*2;
- // generate edge samples... @TODO lerp them!
- for (i=0; i < w; ++i) {
- out[i*2+0] = out[i*2+1] = input[i];
- out[i*2+(2*h-1)*os+0] = out[i*2+(2*h-1)*os+1] = input[i+(h-1)*w];
- }
- for (j=0; j < h; ++j) {
- out[j*os*2+0] = out[j*os*2+os+0] = input[j*w];
- out[j*os*2+os-1] = out[j*os*2+os+os-1] = input[j*w+i-1];
- }
- // now generate interior samples; i & j point to top left of input
- for (j=0; j < h-1; ++j) {
- uint8 *in1 = input+j*s;
- uint8 *in2 = in1 + s;
- uint8 *out1 = out + (j*2+1)*os + 1;
- uint8 *out2 = out1 + os;
- for (i=0; i < w-1; ++i) {
- int p00 = in1[0], p01=in1[1], p10=in2[0], p11=in2[1];
- int p00_3 = p00*3, p01_3 = p01*3, p10_3 = p10*3, p11_3 = p11*3;
-
- #define div16(x) ((uint8) ((x) >> 4))
-
- out1[0] = div16(p00*9 + p01_3 + p10_3 + p11);
- out1[1] = div16(p01*9 + p00_3 + p01_3 + p10);
- out2[0] = div16(p10*9 + p11_3 + p00_3 + p01);
- out2[1] = div16(p11*9 + p10_3 + p01_3 + p00);
- out1 += 2;
- out2 += 2;
- ++in1;
- ++in2;
- }
- }
-}
-
-#define float2fixed(x) ((int) ((x) * 65536 + 0.5))
-
-// 0.38 seconds on 3*anemones.jpg (0.25 with processor = Pro)
-// VC6 without processor=Pro is generating multiple LEAs per multiply!
-static void YCbCr_to_RGB_row(uint8 *out, uint8 *y, uint8 *pcb, uint8 *pcr, int count, int step)
-{
- int i;
- for (i=0; i < count; ++i) {
- int y_fixed = (y[i] << 16) + 32768; // rounding
- int r,g,b;
- int cr = pcr[i] - 128;
- int cb = pcb[i] - 128;
- r = y_fixed + cr*float2fixed(1.40200f);
- g = y_fixed - cr*float2fixed(0.71414f) - cb*float2fixed(0.34414f);
- b = y_fixed + cb*float2fixed(1.77200f);
- r >>= 16;
- g >>= 16;
- b >>= 16;
- if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
- if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
- if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
- out[0] = (uint8)r;
- out[1] = (uint8)g;
- out[2] = (uint8)b;
- if (step == 4) out[3] = 255;
- out += step;
- }
-}
-
-// clean up the temporary component buffers
-static void cleanup_jpeg(void)
-{
- int i;
- for (i=0; i < img_n; ++i) {
- if (img_comp[i].data) {
- free(img_comp[i].data);
- img_comp[i].data = NULL;
- }
- }
-}
-
-static uint8 *load_jpeg_image(int *out_x, int *out_y, int *comp, int req_comp)
-{
- int i, n;
- // validate req_comp
- if (req_comp < 0 || req_comp > 4) return epuc("bad req_comp", "Internal error");
-
- // load a jpeg image from whichever source
- if (!decode_jpeg_image()) { cleanup_jpeg(); return NULL; }
-
- // determine actual number of components to generate
- n = req_comp ? req_comp : img_n;
-
- // resample components to full size... memory wasteful, but this
- // lets us bilerp across blocks while upsampling
- for (i=0; i < img_n; ++i) {
- // if we're outputting fewer than 3 components, we're grey not RGB;
- // in that case, don't bother upsampling Cb or Cr
- if (n < 3 && i) continue;
-
- // check if the component scale is less than max; if so it needs upsampling
- if (img_comp[i].h != img_h_max || img_comp[i].v != img_v_max) {
- int stride = img_x;
- // allocate final size; make sure it's big enough for upsampling off
- // the edges with upsample up to 4x4 (although we only support 2x2
- // currently)
- uint8 *new_data = (uint8 *) malloc((img_x+3)*(img_y+3));
- if (new_data == NULL) {
- cleanup_jpeg();
- return epuc("outofmem", "Out of memory (image too large?)");
- }
- if (img_comp[i].h*2 == img_h_max && img_comp[i].v*2 == img_v_max) {
- int tx = (img_x+1)>>1;
- resample_hv_2(new_data, img_comp[i].data, tx,(img_y+1)>>1, img_comp[i].w2);
- stride = tx*2;
- } else if (img_comp[i].h == img_h_max && img_comp[i].v*2 == img_v_max) {
- resample_v_2(new_data, img_comp[i].data, img_x,(img_y+1)>>1, img_comp[i].w2);
- } else if (img_comp[i].h*2 == img_h_max && img_comp[i].v == img_v_max) {
- int tx = (img_x+1)>>1;
- resample_h_2(new_data, img_comp[i].data, tx,img_y, img_comp[i].w2);
- stride = tx*2;
- } else {
- // @TODO resample uncommon sampling pattern with nearest neighbor
- free(new_data);
- cleanup_jpeg();
- return epuc("uncommon H or V", "JPEG not supported: atypical downsampling mode");
- }
- img_comp[i].w2 = stride;
- free(img_comp[i].data);
- img_comp[i].data = new_data;
- }
- }
-
- // now convert components to output image
- {
- uint32 i,j;
- uint8 *output = (uint8 *) malloc(n * img_x * img_y + 1);
- if (n >= 3) { // output STBI_rgb_*
- for (j=0; j < img_y; ++j) {
- uint8 *y = img_comp[0].data + j*img_comp[0].w2;
- uint8 *out = output + n * img_x * j;
- if (img_n == 3) {
- uint8 *cb = img_comp[1].data + j*img_comp[1].w2;
- uint8 *cr = img_comp[2].data + j*img_comp[2].w2;
- YCbCr_to_RGB_row(out, y, cb, cr, img_x, n);
- } else {
- for (i=0; i < img_x; ++i) {
- out[0] = out[1] = out[2] = y[i];
- out[3] = 255; // not used if n == 3
- out += n;
- }
- }
- }
- } else { // output STBI_grey_*
- for (j=0; j < img_y; ++j) {
- uint8 *y = img_comp[0].data + j*img_comp[0].w2;
- uint8 *out = output + n * img_x * j;
- if (n == 1)
- for (i=0; i < img_x; ++i) *out++ = *y++;
- else
- for (i=0; i < img_x; ++i) *out++ = *y++, *out++ = 255;
- }
- }
- cleanup_jpeg();
- *out_x = img_x;
- *out_y = img_y;
- if (comp) *comp = img_n; // report original components, not output
- return output;
- }
-}
-
-#ifndef STBI_NO_STDIO
-unsigned char *stbi_jpeg_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- start_file(f);
- return load_jpeg_image(x,y,comp,req_comp);
-}
-
-unsigned char *stbi_jpeg_load(char *filename, int *x, int *y, int *comp, int req_comp)
-{
- unsigned char *data;
- FILE *f = fopen(filename, "rb");
- if (!f) return NULL;
- data = stbi_jpeg_load_from_file(f,x,y,comp,req_comp);
- fclose(f);
- return data;
-}
-#endif
-
-unsigned char *stbi_jpeg_load_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- start_mem(buffer,len);
- return load_jpeg_image(x,y,comp,req_comp);
-}
-
-#ifndef STBI_NO_STDIO
-int stbi_jpeg_test_file(FILE *f)
-{
- int n,r;
- n = ftell(f);
- start_file(f);
- r = decode_jpeg_header(SCAN_type);
- fseek(f,n,SEEK_SET);
- return r;
-}
-#endif
-
-int stbi_jpeg_test_memory(unsigned char *buffer, int len)
-{
- start_mem(buffer,len);
- return decode_jpeg_header(SCAN_type);
-}
-
-// @TODO:
-#ifndef STBI_NO_STDIO
-extern int stbi_jpeg_info (char *filename, int *x, int *y, int *comp);
-extern int stbi_jpeg_info_from_file (FILE *f, int *x, int *y, int *comp);
-#endif
-extern int stbi_jpeg_info_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp);
-
-// public domain zlib decode v0.2 Sean Barrett 2006-11-18
-// simple implementation
-// - all input must be provided in an upfront buffer
-// - all output is written to a single output buffer (can malloc/realloc)
-// performance
-// - fast huffman
-
-// fast-way is faster to check than jpeg huffman, but slow way is slower
-#define ZFAST_BITS 9 // accelerate all cases in default tables
-#define ZFAST_MASK ((1 << ZFAST_BITS) - 1)
-
-// zlib-style huffman encoding
-// (jpegs packs from left, zlib from right, so can't share code)
-typedef struct
-{
- uint16 fast[1 << ZFAST_BITS];
- uint16 firstcode[16];
- int maxcode[17];
- uint16 firstsymbol[16];
- uint8 size[288];
- uint16 value[288];
-} zhuffman;
-
-__forceinline static int bitreverse16(int n)
-{
- n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1);
- n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2);
- n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4);
- n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8);
- return n;
-}
-
-__forceinline static int bit_reverse(int v, int bits)
-{
- assert(bits <= 16);
- // to bit reverse n bits, reverse 16 and shift
- // e.g. 11 bits, bit reverse and shift away 5
- return bitreverse16(v) >> (16-bits);
-}
-
-static int zbuild_huffman(zhuffman *z, uint8 *sizelist, int num)
-{
- int i,k=0;
- int code, next_code[16], sizes[17];
-
- // DEFLATE spec for generating codes
- memset(sizes, 0, sizeof(sizes));
- memset(z->fast, 255, sizeof(z->fast));
- for (i=0; i < num; ++i)
- ++sizes[sizelist[i]];
- sizes[0] = 0;
- for (i=1; i < 16; ++i)
- assert(sizes[i] <= (1 << i));
- code = 0;
- for (i=1; i < 16; ++i) {
- next_code[i] = code;
- z->firstcode[i] = (uint16) code;
- z->firstsymbol[i] = (uint16) k;
- code = (code + sizes[i]);
- if (sizes[i])
- if (code-1 >= (1 << i)) return e("bad codelengths","Corrupt JPEG");
- z->maxcode[i] = code << (16-i); // preshift for inner loop
- code <<= 1;
- k += sizes[i];
- }
- z->maxcode[16] = 0x10000; // sentinel
- for (i=0; i < num; ++i) {
- int s = sizelist[i];
- if (s) {
- int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
- z->size[c] = (uint8)s;
- z->value[c] = (uint16)i;
- if (s <= ZFAST_BITS) {
- int k = bit_reverse(next_code[s],s);
- while (k < (1 << ZFAST_BITS)) {
- z->fast[k] = (uint16) c;
- k += (1 << s);
- }
- }
- ++next_code[s];
- }
- }
- return 1;
-}
-
-// zlib-from-memory implementation for PNG reading
-// because PNG allows splitting the zlib stream arbitrarily,
-// and it's annoying structurally to have PNG call ZLIB call PNG,
-// we require PNG read all the IDATs and combine them into a single
-// memory buffer
-
-static uint8 *zbuffer, *zbuffer_end;
-
-__forceinline static int zget8(void)
-{
- if (zbuffer >= zbuffer_end) return 0;
- return *zbuffer++;
-}
-
-//static unsigned long code_buffer;
-static int num_bits;
-
-static void fill_bits(void)
-{
- do {
- assert(code_buffer < (1U << num_bits));
- code_buffer |= zget8() << num_bits;
- num_bits += 8;
- } while (num_bits <= 24);
-}
-
-__forceinline static unsigned int zreceive(int n)
-{
- unsigned int k;
- if (num_bits < n) fill_bits();
- k = code_buffer & ((1 << n) - 1);
- code_buffer >>= n;
- num_bits -= n;
- return k;
-}
-
-__forceinline static int zhuffman_decode(zhuffman *z)
-{
- int b,s,k;
- if (num_bits < 16) fill_bits();
- b = z->fast[code_buffer & ZFAST_MASK];
- if (b < 0xffff) {
- s = z->size[b];
- code_buffer >>= s;
- num_bits -= s;
- return z->value[b];
- }
-
- // not resolved by fast table, so compute it the slow way
- // use jpeg approach, which requires MSbits at top
- k = bit_reverse(code_buffer, 16);
- for (s=ZFAST_BITS+1; ; ++s)
- if (k < z->maxcode[s])
- break;
- if (s == 16) return -1; // invalid code!
- // code size is s, so:
- b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
- assert(z->size[b] == s);
- code_buffer >>= s;
- num_bits -= s;
- return z->value[b];
-}
-
-static char *zout;
-static char *zout_start;
-static char *zout_end;
-static int z_expandable;
-
-static int expand(int n) // need to make room for n bytes
-{
- char *q;
- int cur, limit;
- if (!z_expandable) return e("output buffer limit","Corrupt PNG");
- cur = (int) (zout - zout_start);
- limit = (int) (zout_end - zout_start);
- while (cur + n > limit)
- limit *= 2;
- q = (char *) realloc(zout_start, limit);
- if (q == NULL) return e("outofmem", "Out of memory");
- zout_start = q;
- zout = q + cur;
- zout_end = q + limit;
- return 1;
-}
-
-static zhuffman z_length, z_distance;
-
-static int length_base[31] = {
- 3,4,5,6,7,8,9,10,11,13,
- 15,17,19,23,27,31,35,43,51,59,
- 67,83,99,115,131,163,195,227,258,0,0 };
-
-static int length_extra[31]=
-{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
-
-static int dist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,
-257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
-
-static int dist_extra[32] =
-{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
-
-static int parse_huffman_block(void)
-{
- for(;;) {
- int z = zhuffman_decode(&z_length);
- if (z < 256) {
- if (z < 0) return e("bad huffman code","Corrupt PNG"); // error in huffman codes
- if (zout >= zout_end) if (!expand(1)) return 0;
- *zout++ = (char) z;
- } else {
- uint8 *p;
- int len,dist;
- if (z == 256) return 1;
- z -= 257;
- len = length_base[z];
- if (length_extra[z]) len += zreceive(length_extra[z]);
- z = zhuffman_decode(&z_distance);
- if (z < 0) return e("bad huffman code","Corrupt PNG");
- dist = dist_base[z];
- if (dist_extra[z]) dist += zreceive(dist_extra[z]);
- if (zout - zout_start < dist) return e("bad dist","Corrupt PNG");
- if (zout + len > zout_end) if (!expand(len)) return 0;
- p = (uint8 *) (zout - dist);
- while (len--)
- *zout++ = *p++;
- }
- }
-}
-
-static int compute_huffman_codes(void)
-{
- static uint8 length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
- static zhuffman z_codelength; // static just to save stack space
- uint8 lencodes[286+32+137];//padding for maximum single op
- uint8 codelength_sizes[19];
- int i,n;
-
- int hlit = zreceive(5) + 257;
- int hdist = zreceive(5) + 1;
- int hclen = zreceive(4) + 4;
-
- memset(codelength_sizes, 0, sizeof(codelength_sizes));
- for (i=0; i < hclen; ++i) {
- int s = zreceive(3);
- codelength_sizes[length_dezigzag[i]] = (uint8) s;
- }
- if (!zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0;
-
- n = 0;
- while (n < hlit + hdist) {
- int c = zhuffman_decode(&z_codelength);
- assert(c >= 0 && c < 19);
- if (c < 16)
- lencodes[n++] = (uint8) c;
- else if (c == 16) {
- c = zreceive(2)+3;
- memset(lencodes+n, lencodes[n-1], c);
- n += c;
- } else if (c == 17) {
- c = zreceive(3)+3;
- memset(lencodes+n, 0, c);
- n += c;
- } else {
- assert(c == 18);
- c = zreceive(7)+11;
- memset(lencodes+n, 0, c);
- n += c;
- }
- }
- if (n != hlit+hdist) return e("bad codelengths","Corrupt PNG");
- if (!zbuild_huffman(&z_length, lencodes, hlit)) return 0;
- if (!zbuild_huffman(&z_distance, lencodes+hlit, hdist)) return 0;
- return 1;
-}
-
-static int parse_uncompressed_block(void)
-{
- uint8 header[4];
- int len,nlen,k;
- if (num_bits & 7)
- zreceive(num_bits & 7); // discard
- // drain the bit-packed data into header
- k = 0;
- while (num_bits > 0) {
- header[k++] = (uint8) (code_buffer & 255); // wtf this warns?
- code_buffer >>= 8;
- num_bits -= 8;
- }
- assert(num_bits == 0);
- // now fill header the normal way
- while (k < 4)
- header[k++] = (uint8) zget8();
- len = header[1] * 256 + header[0];
- nlen = header[3] * 256 + header[2];
- if (nlen != (len ^ 0xffff)) return e("zlib corrupt","Corrupt PNG");
- if (zbuffer + len > zbuffer_end) return e("read past buffer","Corrupt PNG");
- if (zout + len > zout_end)
- if (!expand(len)) return 0;
- memcpy(zout, zbuffer, len);
- zbuffer += len;
- zout += len;
- return 1;
-}
-
-static int parse_zlib_header(void)
-{
- int cmf = zget8();
- int cm = cmf & 15;
- /* int cinfo = cmf >> 4; */
- int flg = zget8();
- if ((cmf*256+flg) % 31 != 0) return e("bad zlib header","Corrupt PNG"); // zlib spec
- if (flg & 32) return e("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png
- if (cm != 8) return e("bad compression","Corrupt PNG"); // DEFLATE required for png
- // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
- return 1;
-}
-
-static uint8 default_length[288], default_distance[32];
-static void init_defaults(void)
-{
- int i; // use <= to match clearly with spec
- for (i=0; i <= 143; ++i) default_length[i] = 8;
- for ( ; i <= 255; ++i) default_length[i] = 9;
- for ( ; i <= 279; ++i) default_length[i] = 7;
- for ( ; i <= 287; ++i) default_length[i] = 8;
-
- for (i=0; i <= 31; ++i) default_distance[i] = 5;
-}
-
-static int parse_zlib(int parse_header)
-{
- int final, type;
- if (parse_header)
- if (!parse_zlib_header()) return 0;
- num_bits = 0;
- code_buffer = 0;
- do {
- final = zreceive(1);
- type = zreceive(2);
- if (type == 0) {
- if (!parse_uncompressed_block()) return 0;
- } else if (type == 3) {
- return 0;
- } else {
- if (type == 1) {
- // use fixed code lengths
- if (!default_length[0]) init_defaults();
- if (!zbuild_huffman(&z_length , default_length , 288)) return 0;
- if (!zbuild_huffman(&z_distance, default_distance, 32)) return 0;
- } else {
- if (!compute_huffman_codes()) return 0;
- }
- if (!parse_huffman_block()) return 0;
- }
- } while (!final);
- return 1;
-}
-
-static int do_zlib(char *obuf, int olen, int exp, int parse_header)
-{
- zout_start = obuf;
- zout = obuf;
- zout_end = obuf + olen;
- z_expandable = exp;
-
- return parse_zlib(parse_header);
-}
-
-char *stbi_zlib_decode_malloc_guesssize(int initial_size, int *outlen)
-{
- char *p = (char *) malloc(initial_size);
- if (p == NULL) return NULL;
- if (do_zlib(p, initial_size, 1, 1)) {
- *outlen = (int) (zout - zout_start);
- return zout_start;
- } else {
- free(zout_start);
- return NULL;
- }
-}
-
-char *stbi_zlib_decode_malloc(char *buffer, int len, int *outlen)
-{
- zbuffer = (uint8 *) buffer;
- zbuffer_end = (uint8 *) buffer+len;
- return stbi_zlib_decode_malloc_guesssize(16384, outlen);
-}
-
-int stbi_zlib_decode_buffer(char *obuffer, int olen, char *ibuffer, int ilen)
-{
- zbuffer = (uint8 *) ibuffer;
- zbuffer_end = (uint8 *) ibuffer + ilen;
- if (do_zlib(obuffer, olen, 0, 1))
- return (int) (zout - zout_start);
- else
- return -1;
-}
-
-char *stbi_zlib_decode_noheader_malloc(char *buffer, int len, int *outlen)
-{
- char *p = (char *) malloc(16384);
- if (p == NULL) return NULL;
- zbuffer = (uint8 *) buffer;
- zbuffer_end = (uint8 *) buffer+len;
- if (do_zlib(p, 16384, 1, 0)) {
- *outlen = (int) (zout - zout_start);
- return zout_start;
- } else {
- free(zout_start);
- return NULL;
- }
-}
-
-int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, char *ibuffer, int ilen)
-{
- zbuffer = (uint8 *) ibuffer;
- zbuffer_end = (uint8 *) ibuffer + ilen;
- if (do_zlib(obuffer, olen, 0, 0))
- return (int) (zout - zout_start);
- else
- return -1;
-}
-
-// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18
-// simple implementation
-// - only 8-bit samples
-// - no CRC checking
-// - allocates lots of intermediate memory
-// - avoids problem of streaming data between subsystems
-// - avoids explicit window management
-// performance
-// - uses stb_zlib, a PD zlib implementation with fast huffman decoding
-
-
-typedef struct
-{
- uint32 length;
- uint32 type;
-} chunk;
-
-#define PNG_TYPE(a,b,c,d) (((a) << 24) + ((b) << 16) + ((c) << 8) + (d))
-
-static chunk get_chunk_header(void)
-{
- chunk c;
- c.length = get32();
- c.type = get32();
- return c;
-}
-
-static int check_png_header(void)
-{
- static uint8 png_sig[8] = { 137,80,78,71,13,10,26,10 };
- int i;
- for (i=0; i < 8; ++i)
- if (get8() != png_sig[i]) return e("bad png sig","Not a PNG");
- return 1;
-}
-
-static uint8 *idata, *expanded, *out;
-
-enum {
- F_none=0, F_sub=1, F_up=2, F_avg=3, F_paeth=4,
- F_avg_first, F_paeth_first,
-};
-
-static uint8 first_row_filter[5] =
-{
- F_none, F_sub, F_none, F_avg_first, F_paeth_first
-};
-
-static int paeth(int a, int b, int c)
-{
- int p = a + b - c;
- int pa = abs(p-a);
- int pb = abs(p-b);
- int pc = abs(p-c);
- if (pa <= pb && pa <= pc) return a;
- if (pb <= pc) return b;
- return c;
-}
-
-// create the png data from post-deflated data
-static int create_png_image(uint8 *raw, uint32 raw_len, int out_n)
-{
- uint32 i,j,stride = img_x*out_n;
- int k;
- assert(out_n == img_n || out_n == img_n+1);
- out = (uint8 *) malloc(img_x * img_y * out_n);
- if (!out) return e("outofmem", "Out of memory");
- if (raw_len != (img_n * img_x + 1) * img_y) return e("not enough pixels","Corrupt PNG");
- for (j=0; j < img_y; ++j) {
- uint8 *cur = out + stride*j;
- uint8 *prior = cur - stride;
- int filter = *raw++;
- if (filter > 4) return e("invalid filter","Corrupt PNG");
- // if first row, use special filter that doesn't sample previous row
- if (j == 0) filter = first_row_filter[filter];
- // handle first pixel explicitly
- for (k=0; k < img_n; ++k) {
- switch(filter) {
- case F_none : cur[k] = raw[k]; break;
- case F_sub : cur[k] = raw[k]; break;
- case F_up : cur[k] = raw[k] + prior[k]; break;
- case F_avg : cur[k] = raw[k] + (prior[k]>>1); break;
- case F_paeth : cur[k] = (uint8) (raw[k] + paeth(0,prior[k],0)); break;
- case F_avg_first : cur[k] = raw[k]; break;
- case F_paeth_first: cur[k] = raw[k]; break;
- }
- }
- if (img_n != out_n) cur[img_n] = 255;
- raw += img_n;
- cur += out_n;
- prior += out_n;
- // this is a little gross, so that we don't switch per-pixel or per-component
- if (img_n == out_n) {
- #define CASE(f) \
- case f: \
- for (i=1; i < img_x; ++i, raw+=img_n,cur+=img_n,prior+=img_n) \
- for (k=0; k < img_n; ++k)
- switch(filter) {
- CASE(F_none) cur[k] = raw[k]; break;
- CASE(F_sub) cur[k] = raw[k] + cur[k-img_n]; break;
- CASE(F_up) cur[k] = raw[k] + prior[k]; break;
- CASE(F_avg) cur[k] = raw[k] + ((prior[k] + cur[k-img_n])>>1); break;
- CASE(F_paeth) cur[k] = (uint8) (raw[k] + paeth(cur[k-img_n],prior[k],prior[k-img_n])); break;
- CASE(F_avg_first) cur[k] = raw[k] + (cur[k-img_n] >> 1); break;
- CASE(F_paeth_first) cur[k] = (uint8) (raw[k] + paeth(cur[k-img_n],0,0)); break;
- }
- #undef CASE
- } else {
- assert(img_n+1 == out_n);
- #define CASE(f) \
- case f: \
- for (i=1; i < img_x; ++i, cur[img_n]=255,raw+=img_n,cur+=out_n,prior+=out_n) \
- for (k=0; k < img_n; ++k)
- switch(filter) {
- CASE(F_none) cur[k] = raw[k]; break;
- CASE(F_sub) cur[k] = raw[k] + cur[k-out_n]; break;
- CASE(F_up) cur[k] = raw[k] + prior[k]; break;
- CASE(F_avg) cur[k] = raw[k] + ((prior[k] + cur[k-out_n])>>1); break;
- CASE(F_paeth) cur[k] = (uint8) (raw[k] + paeth(cur[k-out_n],prior[k],prior[k-out_n])); break;
- CASE(F_avg_first) cur[k] = raw[k] + (cur[k-out_n] >> 1); break;
- CASE(F_paeth_first) cur[k] = (uint8) (raw[k] + paeth(cur[k-out_n],0,0)); break;
- }
- #undef CASE
- }
- }
- return 1;
-}
-
-static int compute_transparency(uint8 tc[3], int out_n)
-{
- uint32 i, pixel_count = img_x * img_y;
- uint8 *p = out;
-
- // compute color-based transparency, assuming we've
- // already got 255 as the alpha value in the output
- assert(out_n == 2 || out_n == 4);
-
- p = out;
- if (out_n == 2) {
- for (i=0; i < pixel_count; ++i) {
- p[1] = (p[0] == tc[0] ? 0 : 255);
- p += 2;
- }
- } else {
- for (i=0; i < pixel_count; ++i) {
- if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
- p[3] = 0;
- p += 4;
- }
- }
- return 1;
-}
-
-static int expand_palette(uint8 *palette, int len, int pal_img_n)
-{
- uint32 i, pixel_count = img_x * img_y;
- uint8 *p, *temp_out, *orig = out;
-
- p = (uint8 *) malloc(pixel_count * pal_img_n);
- if (p == NULL) return e("outofmem", "Out of memory");
-
- // between here and free(out) below, exitting would leak
- temp_out = p;
-
- if (pal_img_n == 3) {
- for (i=0; i < pixel_count; ++i) {
- int n = orig[i]*4;
- p[0] = palette[n ];
- p[1] = palette[n+1];
- p[2] = palette[n+2];
- p += 3;
- }
- } else {
- for (i=0; i < pixel_count; ++i) {
- int n = orig[i]*4;
- p[0] = palette[n ];
- p[1] = palette[n+1];
- p[2] = palette[n+2];
- p[3] = palette[n+3];
- p += 4;
- }
- }
- free(out);
- out = temp_out;
- return 1;
-}
-
-static int parse_png_file(int scan, int req_comp)
-{
- uint8 palette[1024], pal_img_n=0;
- uint8 has_trans=0, tc[3];
- uint32 ioff=0, idata_limit=0, i, pal_len=0;
- int first=1,k;
-
- if (!check_png_header()) return 0;
-
- if (scan == SCAN_type) return 1;
-
- for(;;first=0) {
- chunk c = get_chunk_header();
- if (first && c.type != PNG_TYPE('I','H','D','R'))
- return e("first not IHDR","Corrupt PNG");
- switch (c.type) {
- case PNG_TYPE('I','H','D','R'): {
- int depth,color,interlace,comp,filter;
- if (!first) return e("multiple IHDR","Corrupt PNG");
- if (c.length != 13) return e("bad IHDR len","Corrupt PNG");
- img_x = get32(); if (img_x > (1 << 24)) return e("too large","Very large image (corrupt?)");
- img_y = get32(); if (img_y > (1 << 24)) return e("too large","Very large image (corrupt?)");
- depth = get8(); if (depth != 8) return e("8bit only","PNG not supported: 8-bit only");
- color = get8(); if (color > 6) return e("bad ctype","Corrupt PNG");
- if (color == 3) pal_img_n = 3; else if (color & 1) return e("bad ctype","Corrupt PNG");
- comp = get8(); if (comp) return e("bad comp method","Corrupt PNG");
- filter= get8(); if (filter) return e("bad filter method","Corrupt PNG");
- interlace = get8(); if (interlace) return e("interlaced","PNG not supported: interlaced mode");
- if (!img_x || !img_y) return e("0-pixel image","Corrupt PNG");
- if (!pal_img_n) {
- img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
- if ((1 << 30) / img_x / img_n < img_y) return e("too large", "Image too large to decode");
- if (scan == SCAN_header) return 1;
- } else {
- // if paletted, then pal_n is our final components, and
- // img_n is # components to decompress/filter.
- img_n = 1;
- if ((1 << 30) / img_x / 4 < img_y) return e("too large","Corrupt PNG");
- // if SCAN_header, have to scan to see if we have a tRNS
- }
- break;
- }
-
- case PNG_TYPE('P','L','T','E'): {
- if (c.length > 256*3) return e("invalid PLTE","Corrupt PNG");
- pal_len = c.length / 3;
- if (pal_len * 3 != c.length) return e("invalid PLTE","Corrupt PNG");
- for (i=0; i < pal_len; ++i) {
- palette[i*4+0] = get8u();
- palette[i*4+1] = get8u();
- palette[i*4+2] = get8u();
- palette[i*4+3] = 255;
- }
- break;
- }
-
- case PNG_TYPE('t','R','N','S'): {
- if (idata) return e("tRNS after IDAT","Corrupt PNG");
- if (pal_img_n) {
- if (scan == SCAN_header) { img_n = 4; return 1; }
- if (pal_len == 0) return e("tRNS before PLTE","Corrupt PNG");
- if (c.length > pal_len) return e("bad tRNS len","Corrupt PNG");
- pal_img_n = 4;
- for (i=0; i < c.length; ++i)
- palette[i*4+3] = get8u();
- } else {
- if (!(img_n & 1)) return e("tRNS with alpha","Corrupt PNG");
- if (c.length != (uint32) img_n*2) return e("bad tRNS len","Corrupt PNG");
- has_trans = 1;
- for (k=0; k < img_n; ++k)
- tc[k] = (uint8) get16(); // non 8-bit images will be larger
- }
- break;
- }
-
- case PNG_TYPE('I','D','A','T'): {
- if (pal_img_n && !pal_len) return e("no PLTE","Corrupt PNG");
- if (scan == SCAN_header) { img_n = pal_img_n; return 1; }
- if (ioff + c.length > idata_limit) {
- uint8 *p;
- if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096;
- while (ioff + c.length > idata_limit)
- idata_limit *= 2;
- p = (uint8 *) realloc(idata, idata_limit); if (p == NULL) return e("outofmem", "Out of memory");
- idata = p;
- }
- #ifndef STBI_NO_STDIO
- if (img_file)
- {
- if (fread(idata+ioff,1,c.length,img_file) != c.length) return e("outofdata","Corrupt PNG");
- }
- else
- #endif
- {
- memcpy(idata+ioff, img_buffer, c.length);
- img_buffer += c.length;
- }
- ioff += c.length;
- break;
- }
-
- case PNG_TYPE('I','E','N','D'): {
- uint32 raw_len;
- if (scan != SCAN_load) return 1;
- if (idata == NULL) return e("no IDAT","Corrupt PNG");
- expanded = (uint8 *) stbi_zlib_decode_malloc((char *) idata, ioff, (int *) &raw_len);
- if (expanded == NULL) return 0; // zlib should set error
- free(idata); idata = NULL;
- if ((req_comp == img_n+1 && req_comp != 3 && !pal_img_n) || has_trans)
- img_out_n = img_n+1;
- else
- img_out_n = img_n;
- if (!create_png_image(expanded, raw_len, img_out_n)) return 0;
- if (has_trans)
- if (!compute_transparency(tc, img_out_n)) return 0;
- if (pal_img_n) {
- // pal_img_n == 3 or 4
- img_n = pal_img_n; // record the actual colors we had
- img_out_n = pal_img_n;
- if (req_comp >= 3) img_out_n = req_comp;
- if (!expand_palette(palette, pal_len, img_out_n))
- return 0;
- }
- free(expanded); expanded = NULL;
- return 1;
- }
-
- default:
- // if critical, fail
- if ((c.type & (1 << 29)) == 0) {
- #ifndef STBI_NO_FAILURE_STRINGS
- static char invalid_chunk[] = "XXXX chunk not known";
- invalid_chunk[0] = (uint8) (c.type >> 24);
- invalid_chunk[1] = (uint8) (c.type >> 16);
- invalid_chunk[2] = (uint8) (c.type >> 8);
- invalid_chunk[3] = (uint8) (c.type >> 0);
- #endif
- return e(invalid_chunk, "PNG not supported: unknown chunk type");
- }
- skip(c.length);
- break;
- }
- // end of chunk, read and skip CRC
- get8(); get8(); get8(); get8();
- }
-}
-
-static unsigned char *do_png(int *x, int *y, int *n, int req_comp)
-{
- unsigned char *result=NULL;
- if (req_comp < 0 || req_comp > 4) return epuc("bad req_comp", "Internal error");
- if (parse_png_file(SCAN_load, req_comp)) {
- result = out;
- out = NULL;
- if (req_comp && req_comp != img_out_n) {
- result = convert_format(result, img_out_n, req_comp);
- if (result == NULL) return result;
- }
- *x = img_x;
- *y = img_y;
- if (n) *n = img_n;
- }
- free(out); out = NULL;
- free(expanded); expanded = NULL;
- free(idata); idata = NULL;
-
- return result;
-}
-
-#ifndef STBI_NO_STDIO
-unsigned char *stbi_png_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- start_file(f);
- return do_png(x,y,comp,req_comp);
-}
-
-unsigned char *stbi_png_load(char *filename, int *x, int *y, int *comp, int req_comp)
-{
- unsigned char *data;
- FILE *f = fopen(filename, "rb");
- if (!f) return NULL;
- data = stbi_png_load_from_file(f,x,y,comp,req_comp);
- fclose(f);
- return data;
-}
-#endif
-
-unsigned char *stbi_png_load_from_memory(unsigned char *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- start_mem(buffer,len);
- return do_png(x,y,comp,req_comp);
-}
-
-#ifndef STBI_NO_STDIO
-int stbi_png_test_file(FILE *f)
-{
- int n,r;
- n = ftell(f);
- start_file(f);
- r = parse_png_file(SCAN_type,STBI_default);
- fseek(f,n,SEEK_SET);
- return r;
-}
-#endif
-
-int stbi_png_test_memory(unsigned char *buffer, int len)
-{
- start_mem(buffer, len);
- return parse_png_file(SCAN_type,STBI_default);
-}
-
-// TODO: load header from png
-#ifndef STBI_NO_STDIO
-extern int stbi_png_info (char *filename, int *x, int *y, int *comp);
-extern int stbi_png_info_from_file (FILE *f, int *x, int *y, int *comp);
-#endif
-extern int stbi_png_info_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp);
-
-// Microsoft/Windows BMP image
-
-static int bmp_test(void)
-{
- int sz;
- if (get8() != 'B') return 0;
- if (get8() != 'M') return 0;
- get32le(); // discard filesize
- get16le(); // discard reserved
- get16le(); // discard reserved
- get32le(); // discard data offset
- sz = get32le();
- if (sz == 12 || sz == 40 || sz == 56 || sz == 108) return 1;
- return 0;
-}
-
-#ifndef STBI_NO_STDIO
-int stbi_bmp_test_file (FILE *f)
-{
- int r,n = ftell(f);
- start_file(f);
- r = bmp_test();
- fseek(f,n,SEEK_SET);
- return r;
-}
-#endif
-
-int stbi_bmp_test_memory (stbi_uc *buffer, int len)
-{
- start_mem(buffer, len);
- return bmp_test();
-}
-
-// returns 0..31 for the highest set bit
-static int high_bit(unsigned int z)
-{
- int n=0;
- if (z == 0) return -1;
- if (z >= 0x10000) n += 16, z >>= 16;
- if (z >= 0x00100) n += 8, z >>= 8;
- if (z >= 0x00010) n += 4, z >>= 4;
- if (z >= 0x00004) n += 2, z >>= 2;
- if (z >= 0x00002) n += 1, z >>= 1;
- return n;
-}
-
-static int bitcount(unsigned int a)
-{
- a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2
- a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4
- a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits
- a = (a + (a >> 8)); // max 16 per 8 bits
- a = (a + (a >> 16)); // max 32 per 8 bits
- return a & 0xff;
-}
-
-static int shiftsigned(int v, int shift, int bits)
-{
- int result;
- int z=0;
-
- if (shift < 0) v <<= -shift;
- else v >>= shift;
- result = v;
-
- z = bits;
- while (z < 8) {
- result += v >> z;
- z += bits;
- }
- return result;
-}
-
-static stbi_uc *bmp_load(int *x, int *y, int *comp, int req_comp)
-{
- unsigned int mr=0,mg=0,mb=0,ma=0;
- stbi_uc pal[256][4];
- int psize=0,i,j,compress=0,width;
- int bpp, flip_vertically, pad, target, offset, hsz;
- if (get8() != 'B' || get8() != 'M') return epuc("not BMP", "Corrupt BMP");
- get32le(); // discard filesize
- get16le(); // discard reserved
- get16le(); // discard reserved
- offset = get32le();
- hsz = get32le();
- if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108) return epuc("unknown BMP", "BMP type not supported: unknown");
- failure_reason = "bad BMP";
- if (hsz == 12) {
- img_x = get16le();
- img_y = get16le();
- } else {
- img_x = get32le();
- img_y = get32le();
- }
- if (get16le() != 1) return 0;
- bpp = get16le();
- if (bpp == 1) return epuc("monochrome", "BMP type not supported: 1-bit");
- flip_vertically = ((int) img_y) > 0;
- img_y = abs((int) img_y);
- if (hsz == 12) {
- if (bpp < 24)
- psize = (offset - 14 - 24) / 3;
- } else {
- compress = get32le();
- if (compress == 1 || compress == 2) return epuc("BMP RLE", "BMP type not supported: RLE");
- get32le(); // discard sizeof
- get32le(); // discard hres
- get32le(); // discard vres
- get32le(); // discard colorsused
- get32le(); // discard max important
- if (hsz == 40 || hsz == 56) {
- if (hsz == 56) {
- get32le();
- get32le();
- get32le();
- get32le();
- }
- if (bpp == 16 || bpp == 32) {
- mr = mg = mb = 0;
- if (compress == 0) {
- if (bpp == 32) {
- mr = 0xff << 16;
- mg = 0xff << 8;
- mb = 0xff << 0;
- } else {
- mr = 31 << 10;
- mg = 31 << 5;
- mb = 31 << 0;
- }
- } else if (compress == 3) {
- mr = get32le();
- mg = get32le();
- mb = get32le();
- // not documented, but generated by photoshop and handled by mspaint
- if (mr == mg && mg == mb) {
- // ?!?!?
- return NULL;
- }
- } else
- return NULL;
- }
- } else {
- assert(hsz == 108);
- mr = get32le();
- mg = get32le();
- mb = get32le();
- ma = get32le();
- get32le(); // discard color space
- for (i=0; i < 12; ++i)
- get32le(); // discard color space parameters
- }
- if (bpp < 16)
- psize = (offset - 14 - hsz) >> 2;
- }
- img_n = ma ? 4 : 3;
- if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
- target = req_comp;
- else
- target = img_n; // if they want monochrome, we'll post-convert
- out = (stbi_uc *) malloc(target * img_x * img_y);
- if (!out) return epuc("outofmem", "Out of memory");
- if (bpp < 16) {
- int z=0;
- if (psize == 0 || psize > 256) return epuc("invalid", "Corrupt BMP");
- for (i=0; i < psize; ++i) {
- pal[i][2] = get8();
- pal[i][1] = get8();
- pal[i][0] = get8();
- if (hsz != 12) get8();
- pal[i][3] = 255;
- }
- skip(offset - 14 - hsz - psize * (hsz == 12 ? 3 : 4));
- if (bpp == 4) width = (img_x + 1) >> 1;
- else if (bpp == 8) width = img_x;
- else return epuc("bad bpp", "Corrupt BMP");
- pad = (-width)&3;
- for (j=0; j < (int) img_y; ++j) {
- for (i=0; i < (int) img_x; i += 2) {
- int v=get8(),v2=0;
- if (bpp == 4) {
- v2 = v & 15;
- v >>= 4;
- }
- out[z++] = pal[v][0];
- out[z++] = pal[v][1];
- out[z++] = pal[v][2];
- if (target == 4) out[z++] = 255;
- if (i+1 == (int) img_x) break;
- v = (bpp == 8) ? get8() : v2;
- out[z++] = pal[v][0];
- out[z++] = pal[v][1];
- out[z++] = pal[v][2];
- if (target == 4) out[z++] = 255;
- }
- skip(pad);
- }
- } else {
- int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0;
- int z = 0;
- int easy=0;
- skip(offset - 14 - hsz);
- if (bpp == 24) width = 3 * img_x;
- else if (bpp == 16) width = 2*img_x;
- else /* bpp = 32 and pad = 0 */ width=0;
- pad = (-width) & 3;
- if (bpp == 24) {
- easy = 1;
- } else if (bpp == 32) {
- if (mb == 0xff && mg == 0xff00 && mr == 0xff000000 && ma == 0xff000000)
- easy = 2;
- }
- if (!easy) {
- if (!mr || !mg || !mb) return epuc("bad masks", "Corrupt BMP");
- // right shift amt to put high bit in position #7
- rshift = high_bit(mr)-7; rcount = bitcount(mr);
- gshift = high_bit(mg)-7; gcount = bitcount(mr);
- bshift = high_bit(mb)-7; bcount = bitcount(mr);
- ashift = high_bit(ma)-7; acount = bitcount(mr);
- }
- for (j=0; j < (int) img_y; ++j) {
- if (easy) {
- for (i=0; i < (int) img_x; ++i) {
- int a;
- out[z+2] = get8();
- out[z+1] = get8();
- out[z+0] = get8();
- z += 3;
- a = (easy == 2 ? get8() : 255);
- if (target == 4) out[z++] = a;
- }
- } else {
- for (i=0; i < (int) img_x; ++i) {
- uint32 v = (bpp == 16 ? get16le() : get32le());
- int a;
- out[z++] = shiftsigned(v & mr, rshift, rcount);
- out[z++] = shiftsigned(v & mg, gshift, gcount);
- out[z++] = shiftsigned(v & mb, bshift, bcount);
- a = (ma ? shiftsigned(v & ma, ashift, acount) : 255);
- if (target == 4) out[z++] = a;
- }
- }
- skip(pad);
- }
- }
- if (flip_vertically) {
- stbi_uc t;
- for (j=0; j < (int) img_y>>1; ++j) {
- stbi_uc *p1 = out + j *img_x*target;
- stbi_uc *p2 = out + (img_y-1-j)*img_x*target;
- for (i=0; i < (int) img_x*target; ++i) {
- t = p1[i], p1[i] = p2[i], p2[i] = t;
- }
- }
- }
-
- if (req_comp && req_comp != target) {
- out = convert_format(out, target, req_comp);
- if (out == NULL) return out; // convert_format frees input on failure
- }
-
- *x = img_x;
- *y = img_y;
- if (comp) *comp = target;
- return out;
-}
-
-#ifndef STBI_NO_STDIO
-stbi_uc *stbi_bmp_load (char *filename, int *x, int *y, int *comp, int req_comp)
-{
- stbi_uc *data;
- FILE *f = fopen(filename, "rb");
- if (!f) return NULL;
- data = stbi_bmp_load_from_file(f, x,y,comp,req_comp);
- fclose(f);
- return data;
-}
-
-stbi_uc *stbi_bmp_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- start_file(f);
- return bmp_load(x,y,comp,req_comp);
-}
-#endif
-
-stbi_uc *stbi_bmp_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- start_mem(buffer, len);
- return bmp_load(x,y,comp,req_comp);
-}
-
-// Targa Truevision - TGA
-// by Jonathan Dummer
-
-static int tga_test(void)
-{
- int sz;
- get8u(); // discard Offset
- sz = get8u(); // color type
- if( sz > 1 ) return 0; // only RGB or indexed allowed
- sz = get8u(); // image type
- if( (sz != 1) && (sz != 2) && (sz != 3) && (sz != 9) && (sz != 10) && (sz != 11) ) return 0; // only RGB or grey allowed, +/- RLE
- get16(); // discard palette start
- get16(); // discard palette length
- get8(); // discard bits per palette color entry
- get16(); // discard x origin
- get16(); // discard y origin
- if( get16() < 1 ) return 0; // test width
- if( get16() < 1 ) return 0; // test height
- sz = get8(); // bits per pixel
- if( (sz != 8) && (sz != 16) && (sz != 24) && (sz != 32) ) return 0; // only RGB or RGBA or grey allowed
- return 1; // seems to have passed everything
-}
-
-#ifndef STBI_NO_STDIO
-int stbi_tga_test_file (FILE *f)
-{
- int r,n = ftell(f);
- start_file(f);
- r = tga_test();
- fseek(f,n,SEEK_SET);
- return r;
-}
-#endif
-
-int stbi_tga_test_memory (stbi_uc *buffer, int len)
-{
- start_mem(buffer, len);
- return tga_test();
-}
-
-static stbi_uc *tga_load(int *x, int *y, int *comp, int req_comp)
-{
- // read in the TGA header stuff
- int tga_offset = get8u();
- int tga_indexed = get8u();
- int tga_image_type = get8u();
- int tga_is_RLE = 0;
- int tga_palette_start = get16le();
- int tga_palette_len = get16le();
- int tga_palette_bits = get8u();
- int tga_x_origin = get16le();
- int tga_y_origin = get16le();
- int tga_width = get16le();
- int tga_height = get16le();
- int tga_bits_per_pixel = get8u();
- int tga_inverted = get8u();
- // image data
- unsigned char *tga_data;
- unsigned char *tga_palette = NULL;
- int i, j;
- unsigned char raw_data[4];
- unsigned char trans_data[] = {0, 0, 0, 0};
- int RLE_count = 0;
- int RLE_repeating = 0;
- int read_next_pixel = 1;
- // do a tiny bit of precessing
- if( tga_image_type >= 8 )
- {
- tga_image_type -= 8;
- tga_is_RLE = 1;
- }
- /* int tga_alpha_bits = tga_inverted & 15; */
- tga_inverted = 1 - ((tga_inverted >> 5) & 1);
-
- // error check
- if( //(tga_indexed) ||
- (tga_width < 1) || (tga_height < 1) ||
- (tga_image_type < 1) || (tga_image_type > 3) ||
- ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16) &&
- (tga_bits_per_pixel != 24) && (tga_bits_per_pixel != 32))
- )
- {
- return NULL;
- }
-
- // If I'm paletted, then I'll use the number of bits from the palette
- if( tga_indexed )
- {
- tga_bits_per_pixel = tga_palette_bits;
- }
-
- // tga info
- *x = tga_width;
- *y = tga_height;
- if( (req_comp < 1) || (req_comp > 4) )
- {
- // just use whatever the file was
- req_comp = tga_bits_per_pixel / 8;
- *comp = req_comp;
- } else
- {
- // force a new number of components
- *comp = tga_bits_per_pixel/8;
- }
- tga_data = (unsigned char*)malloc( tga_width * tga_height * req_comp );
-
- // skip to the data's starting position (offset usually = 0)
- skip( tga_offset );
- // do I need to load a palette?
- if( tga_indexed )
- {
- // any data to skip? (offset usually = 0)
- skip( tga_palette_start );
- // load the palette
- tga_palette = (unsigned char*)malloc( tga_palette_len * tga_palette_bits / 8 );
- getn( tga_palette, tga_palette_len * tga_palette_bits / 8 );
- }
- // load the data
- for( i = 0; i < tga_width * tga_height; ++i )
- {
- // if I'm in RLE mode, do I need to get a RLE chunk?
- if( tga_is_RLE )
- {
- if( RLE_count == 0 )
- {
- // yep, get the next byte as a RLE command
- int RLE_cmd = get8u();
- RLE_count = 1 + (RLE_cmd & 127);
- RLE_repeating = RLE_cmd >> 7;
- read_next_pixel = 1;
- } else if( !RLE_repeating )
- {
- read_next_pixel = 1;
- }
- } else
- {
- read_next_pixel = 1;
- }
- // OK, if I need to read a pixel, do it now
- if( read_next_pixel )
- {
- // load however much data we did have
- if( tga_indexed )
- {
- // read in 1 byte, then perform the lookup
- int pal_idx = get8u();
- if( pal_idx >= tga_palette_len )
- {
- // invalid index
- pal_idx = 0;
- }
- pal_idx *= tga_bits_per_pixel / 8;
- for( j = 0; j*8 < tga_bits_per_pixel; ++j )
- {
- raw_data[j] = tga_palette[pal_idx+j];
- }
- } else
- {
- // read in the data raw
- for( j = 0; j*8 < tga_bits_per_pixel; ++j )
- {
- raw_data[j] = get8u();
- }
- }
- // convert raw to the intermediate format
- switch( tga_bits_per_pixel )
- {
- case 8:
- // Luminous => RGBA
- trans_data[0] = raw_data[0];
- trans_data[1] = raw_data[0];
- trans_data[2] = raw_data[0];
- trans_data[3] = 255;
- break;
- case 16:
- // Luminous,Alpha => RGBA
- trans_data[0] = raw_data[0];
- trans_data[1] = raw_data[0];
- trans_data[2] = raw_data[0];
- trans_data[3] = raw_data[1];
- break;
- case 24:
- // BGR => RGBA
- trans_data[0] = raw_data[2];
- trans_data[1] = raw_data[1];
- trans_data[2] = raw_data[0];
- trans_data[3] = 255;
- break;
- case 32:
- // BGRA => RGBA
- trans_data[0] = raw_data[2];
- trans_data[1] = raw_data[1];
- trans_data[2] = raw_data[0];
- trans_data[3] = raw_data[3];
- break;
- }
- // clear the reading flag for the next pixel
- read_next_pixel = 0;
- } // end of reading a pixel
- // convert to final format
- switch( req_comp )
- {
- case 1:
- // RGBA => Luminance
- tga_data[i*req_comp+0] = compute_y(trans_data[0],trans_data[1],trans_data[2]);
- break;
- case 2:
- // RGBA => Luminance,Alpha
- tga_data[i*req_comp+0] = compute_y(trans_data[0],trans_data[1],trans_data[2]);
- tga_data[i*req_comp+1] = trans_data[3];
- break;
- case 3:
- // RGBA => RGB
- tga_data[i*req_comp+0] = trans_data[0];
- tga_data[i*req_comp+1] = trans_data[1];
- tga_data[i*req_comp+2] = trans_data[2];
- break;
- case 4:
- // RGBA => RGBA
- tga_data[i*req_comp+0] = trans_data[0];
- tga_data[i*req_comp+1] = trans_data[1];
- tga_data[i*req_comp+2] = trans_data[2];
- tga_data[i*req_comp+3] = trans_data[3];
- break;
- }
- // in case we're in RLE mode, keep counting down
- --RLE_count;
- }
- // do I need to invert the image?
- if( tga_inverted )
- {
- for( j = 0; j*2 < tga_height; ++j )
- {
- int index1 = j * tga_width * req_comp;
- int index2 = (tga_height - 1 - j) * tga_width * req_comp;
- for( i = tga_width * req_comp; i > 0; --i )
- {
- unsigned char temp = tga_data[index1];
- tga_data[index1] = tga_data[index2];
- tga_data[index2] = temp;
- ++index1;
- ++index2;
- }
- }
- }
- // clear my palette, if I had one
- if( tga_palette != NULL )
- {
- free( tga_palette );
- }
- // the things I do to get rid of an error message, and yet keep
- // Microsoft's C compilers happy... [8^(
- tga_palette_start = tga_palette_len = tga_palette_bits =
- tga_x_origin = tga_y_origin = 0;
- // OK, done
- return tga_data;
-}
-
-#ifndef STBI_NO_STDIO
-stbi_uc *stbi_tga_load (char *filename, int *x, int *y, int *comp, int req_comp)
-{
- stbi_uc *data;
- FILE *f = fopen(filename, "rb");
- if (!f) return NULL;
- data = stbi_tga_load_from_file(f, x,y,comp,req_comp);
- fclose(f);
- return data;
-}
-
-stbi_uc *stbi_tga_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- start_file(f);
- return tga_load(x,y,comp,req_comp);
-}
-#endif
-
-stbi_uc *stbi_tga_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- start_mem(buffer, len);
- return tga_load(x,y,comp,req_comp);
-}
-
-
-// *************************************************************************************************
-// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicholas Schulz, tweaked by STB
-
-static int psd_test(void)
-{
- if (get32() != 0x38425053) return 0; // "8BPS"
- else return 1;
-}
-
-#ifndef STBI_NO_STDIO
-int stbi_psd_test_file(FILE *f)
-{
- int r,n = ftell(f);
- start_file(f);
- r = psd_test();
- fseek(f,n,SEEK_SET);
- return r;
-}
-#endif
-
-int stbi_psd_test_memory(stbi_uc *buffer, int len)
-{
- start_mem(buffer, len);
- return psd_test();
-}
-
-static stbi_uc *psd_load(int *x, int *y, int *comp, int req_comp)
-{
- int pixelCount;
- int channelCount, compression;
- int channel, i, count, len;
- int w,h;
-
- // Check identifier
- if (get32() != 0x38425053) // "8BPS"
- return epuc("not PSD", "Corrupt PSD image");
-
- // Check file type version.
- if (get16() != 1)
- return epuc("wrong version", "Unsupported version of PSD image");
-
- // Skip 6 reserved bytes.
- skip( 6 );
-
- // Read the number of channels (R, G, B, A, etc).
- channelCount = get16();
- if (channelCount < 0 || channelCount > 16)
- return epuc("wrong channel count", "Unsupported number of channels in PSD image");
-
- // Read the rows and columns of the image.
- h = get32();
- w = get32();
-
- // Make sure the depth is 8 bits.
- if (get16() != 8)
- return epuc("unsupported bit depth", "PSD bit depth is not 8 bit");
-
- // Make sure the color mode is RGB.
- // Valid options are:
- // 0: Bitmap
- // 1: Grayscale
- // 2: Indexed color
- // 3: RGB color
- // 4: CMYK color
- // 7: Multichannel
- // 8: Duotone
- // 9: Lab color
- if (get16() != 3)
- return epuc("wrong color format", "PSD is not in RGB color format");
-
- // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.)
- skip(get32() );
-
- // Skip the image resources. (resolution, pen tool paths, etc)
- skip( get32() );
-
- // Skip the reserved data.
- skip( get32() );
-
- // Find out if the data is compressed.
- // Known values:
- // 0: no compression
- // 1: RLE compressed
- compression = get16();
- if (compression > 1)
- return epuc("unknown compression type", "PSD has an unknown compression format");
-
- // Create the destination image.
- out = (stbi_uc *) malloc(4 * w*h);
- if (!out) return epuc("outofmem", "Out of memory");
- pixelCount = w*h;
-
- // Initialize the data to zero.
- //memset( out, 0, pixelCount * 4 );
-
- // Finally, the image data.
- if (compression) {
- // RLE as used by .PSD and .TIFF
- // Loop until you get the number of unpacked bytes you are expecting:
- // Read the next source byte into n.
- // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
- // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
- // Else if n is 128, noop.
- // Endloop
-
- // The RLE-compressed data is preceeded by a 2-byte data count for each row in the data,
- // which we're going to just skip.
- skip( h * channelCount * 2 );
-
- // Read the RLE data by channel.
- for (channel = 0; channel < 4; channel++) {
- uint8 *p;
-
- p = out+channel;
- if (channel >= channelCount) {
- // Fill this channel with default data.
- for (i = 0; i < pixelCount; i++) *p = (channel == 3 ? 255 : 0), p += 4;
- } else {
- // Read the RLE data.
- count = 0;
- while (count < pixelCount) {
- len = get8();
- if (len == 128) {
- // No-op.
- } else if (len < 128) {
- // Copy next len+1 bytes literally.
- len++;
- count += len;
- while (len) {
- *p = get8();
- p += 4;
- len--;
- }
- } else if (len > 128) {
- uint32 val;
- // Next -len+1 bytes in the dest are replicated from next source byte.
- // (Interpret len as a negative 8-bit int.)
- len ^= 0x0FF;
- len += 2;
- val = get8();
- count += len;
- while (len) {
- *p = val;
- p += 4;
- len--;
- }
- }
- }
- }
- }
-
- } else {
- // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...)
- // where each channel consists of an 8-bit value for each pixel in the image.
-
- // Read the data by channel.
- for (channel = 0; channel < 4; channel++) {
- uint8 *p;
-
- p = out + channel;
- if (channel > channelCount) {
- // Fill this channel with default data.
- for (i = 0; i < pixelCount; i++) *p = channel == 3 ? 255 : 0, p += 4;
- } else {
- // Read the data.
- count = 0;
- for (i = 0; i < pixelCount; i++)
- *p = get8(), p += 4;
- }
- }
- }
-
- if (req_comp && req_comp != 4) {
- out = convert_format(out, 4, req_comp);
- if (out == NULL) return out; // convert_format frees input on failure
- }
-
- if (comp) *comp = channelCount;
- *y = h;
- *x = w;
-
- return out;
-}
-
-#ifndef STBI_NO_STDIO
-stbi_uc *stbi_psd_load(char *filename, int *x, int *y, int *comp, int req_comp)
-{
- stbi_uc *data;
- FILE *f = fopen(filename, "rb");
- if (!f) return NULL;
- data = stbi_psd_load_from_file(f, x,y,comp,req_comp);
- fclose(f);
- return data;
-}
-
-stbi_uc *stbi_psd_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- start_file(f);
- return psd_load(x,y,comp,req_comp);
-}
-#endif
-
-stbi_uc *stbi_psd_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- start_mem(buffer, len);
- return psd_load(x,y,comp,req_comp);
-}
-
-
-// *************************************************************************************************
-// Radiance RGBE HDR loader
-// originally by Nicolas Schulz
-#ifndef STBI_NO_HDR
-static int hdr_test(void)
-{
- char *signature = "#?RADIANCE\n";
- int i;
- for (i=0; signature[i]; ++i)
- if (get8() != signature[i])
- return 0;
- return 1;
-}
-
-int stbi_hdr_test_memory(stbi_uc *buffer, int len)
-{
- start_mem(buffer, len);
- return hdr_test();
-}
-
-#ifndef STBI_NO_STDIO
-int stbi_hdr_test_file(FILE *f)
-{
- int r,n = ftell(f);
- start_file(f);
- r = hdr_test();
- fseek(f,n,SEEK_SET);
- return r;
-}
-#endif
-
-#define HDR_BUFLEN 1024
-static char *hdr_gettoken(char *buffer)
-{
- int len=0;
- char *s = buffer, c = '\0';
-
- c = get8();
-
- while (!at_eof() && c != '\n') {
- buffer[len++] = c;
- if (len == HDR_BUFLEN-1) {
- // flush to end of line
- while (!at_eof() && get8() != '\n')
- ;
- break;
- }
- c = get8();
- }
-
- buffer[len] = 0;
- return buffer;
-}
-
-static void hdr_convert(float *output, stbi_uc *input, int req_comp)
-{
- if( input[3] != 0 ) {
- float f1;
- // Exponent
- f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8));
- if (req_comp <= 2)
- output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
- else {
- output[0] = input[0] * f1;
- output[1] = input[1] * f1;
- output[2] = input[2] * f1;
- }
- if (req_comp == 2) output[1] = 1;
- if (req_comp == 4) output[3] = 1;
- } else {
- switch (req_comp) {
- case 4: output[3] = 1; /* fallthrough */
- case 3: output[0] = output[1] = output[2] = 0;
- break;
- case 2: output[1] = 1; /* fallthrough */
- case 1: output[0] = 0;
- break;
- }
- }
-}
-
-
-static float *hdr_load(int *x, int *y, int *comp, int req_comp)
-{
- char buffer[HDR_BUFLEN];
- char *token;
- int valid = 0;
- int width, height;
- stbi_uc *scanline;
- float *hdr_data;
- int len;
- unsigned char count, value;
- int i, j, k, c1,c2, z;
-
-
- // Check identifier
- if (strcmp(hdr_gettoken(buffer), "#?RADIANCE") != 0)
- return epf("not HDR", "Corrupt HDR image");
-
- // Parse header
- while(1) {
- token = hdr_gettoken(buffer);
- if (token[0] == 0) break;
- if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
- }
-
- if (!valid) return epf("unsupported format", "Unsupported HDR format");
-
- // Parse width and height
- // can't use sscanf() if we're not using stdio!
- token = hdr_gettoken(buffer);
- if (strncmp(token, "-Y ", 3)) return epf("unsupported data layout", "Unsupported HDR format");
- token += 3;
- height = strtol(token, &token, 10);
- while (*token == ' ') ++token;
- if (strncmp(token, "+X ", 3)) return epf("unsupported data layout", "Unsupported HDR format");
- token += 3;
- width = strtol(token, NULL, 10);
-
- *x = width;
- *y = height;
-
- *comp = 3;
- if (req_comp == 0) req_comp = 3;
-
- // Read data
- hdr_data = (float *) malloc(height * width * req_comp * sizeof(float));
-
- // Load image data
- // image data is stored as some number of sca
- if( width < 8 || width >= 32768) {
- // Read flat data
- for (j=0; j < height; ++j) {
- for (i=0; i < width; ++i) {
- stbi_uc rgbe[4];
- main_decode_loop:
- getn(rgbe, 4);
- hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
- }
- }
- } else {
- // Read RLE-encoded data
- scanline = NULL;
-
- for (j = 0; j < height; ++j) {
- c1 = get8();
- c2 = get8();
- len = get8();
- if (c1 != 2 || c2 != 2 || (len & 0x80)) {
- // not run-length encoded, so we have to actually use THIS data as a decoded
- // pixel (note this can't be a valid pixel--one of RGB must be >= 128)
- stbi_uc rgbe[4] = { c1,c2,len, get8() };
- hdr_convert(hdr_data, rgbe, req_comp);
- i = 1;
- j = 0;
- free(scanline);
- goto main_decode_loop; // yes, this is fucking insane; blame the fucking insane format
- }
- len <<= 8;
- len |= get8();
- if (len != width) { free(hdr_data); free(scanline); return epf("invalid decoded scanline length", "corrupt HDR"); }
- if (scanline == NULL) scanline = (stbi_uc *) malloc(width * 4);
-
- for (k = 0; k < 4; ++k) {
- i = 0;
- while (i < width) {
- count = get8();
- if (count > 128) {
- // Run
- value = get8();
- count -= 128;
- for (z = 0; z < count; ++z)
- scanline[i++ * 4 + k] = value;
- } else {
- // Dump
- for (z = 0; z < count; ++z)
- scanline[i++ * 4 + k] = get8();
- }
- }
- }
- for (i=0; i < width; ++i)
- hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp);
- }
- free(scanline);
- }
-
- return hdr_data;
-}
-
-#ifndef STBI_NO_STDIO
-float *stbi_hdr_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- start_file(f);
- return hdr_load(x,y,comp,req_comp);
-}
-#endif
-
-float *stbi_hdr_load_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- start_mem(buffer, len);
- return hdr_load(x,y,comp,req_comp);
-}
-
-#endif // STBI_NO_HDR
-
-/////////////////////// write image ///////////////////////
-
-#ifndef STBI_NO_WRITE
-
-static void write8(FILE *f, int x) { uint8 z = (uint8) x; fwrite(&z,1,1,f); }
-
-static void writefv(FILE *f, char *fmt, va_list v)
-{
- while (*fmt) {
- switch (*fmt++) {
- case ' ': break;
- case '1': { uint8 x = va_arg(v, int); write8(f,x); break; }
- case '2': { int16 x = va_arg(v, int); write8(f,x); write8(f,x>>8); break; }
- case '4': { int32 x = va_arg(v, int); write8(f,x); write8(f,x>>8); write8(f,x>>16); write8(f,x>>24); break; }
- default:
- assert(0);
- va_end(v);
- return;
- }
- }
-}
-
-static void writef(FILE *f, char *fmt, ...)
-{
- va_list v;
- va_start(v, fmt);
- writefv(f,fmt,v);
- va_end(v);
-}
-
-static void write_pixels(FILE *f, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad)
-{
- uint8 bg[3] = { 255, 0, 255}, px[3];
- uint32 zero = 0;
- int i,j,k, j_end;
-
- if (vdir < 0)
- j_end = -1, j = y-1;
- else
- j_end = y, j = 0;
-
- for (; j != j_end; j += vdir) {
- for (i=0; i < x; ++i) {
- uint8 *d = (uint8 *) data + (j*x+i)*comp;
- if (write_alpha < 0)
- fwrite(&d[comp-1], 1, 1, f);
- switch (comp) {
- case 1:
- case 2: writef(f, "111", d[0],d[0],d[0]);
- break;
- case 4:
- if (!write_alpha) {
- for (k=0; k < 3; ++k)
- px[k] = bg[k] + ((d[k] - bg[k]) * d[3])/255;
- writef(f, "111", px[1-rgb_dir],px[1],px[1+rgb_dir]);
- break;
- }
- /* FALLTHROUGH */
- case 3:
- writef(f, "111", d[1-rgb_dir],d[1],d[1+rgb_dir]);
- break;
- }
- if (write_alpha > 0)
- fwrite(&d[comp-1], 1, 1, f);
- }
- fwrite(&zero,scanline_pad,1,f);
- }
-}
-
-static int outfile(char *filename, int rgb_dir, int vdir, int x, int y, int comp, void *data, int alpha, int pad, char *fmt, ...)
-{
- FILE *f = fopen(filename, "wb");
- if (f) {
- va_list v;
- va_start(v, fmt);
- writefv(f, fmt, v);
- va_end(v);
- write_pixels(f,rgb_dir,vdir,x,y,comp,data,alpha,pad);
- fclose(f);
- }
- return f != NULL;
-}
-
-int stbi_write_bmp(char *filename, int x, int y, int comp, void *data)
-{
- int pad = (-x*3) & 3;
- return outfile(filename,-1,-1,x,y,comp,data,0,pad,
- "11 4 22 4" "4 44 22 444444",
- 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header
- 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header
-}
-
-int stbi_write_tga(char *filename, int x, int y, int comp, void *data)
-{
- int has_alpha = !(comp & 1);
- return outfile(filename, -1,-1, x, y, comp, data, has_alpha, 0,
- "111 221 2222 11", 0,0,2, 0,0,0, 0,0,x,y, 24+8*has_alpha, 8*has_alpha);
-}
-
-// any other image formats that do interleaved rgb data?
-// PNG: requires adler32,crc32 -- significant amount of code
-// PSD: no, channels output separately
-// TIFF: no, stripwise-interleaved... i think
-
-#endif // STBI_NO_WRITE
-
-// add in my DDS loading support
-#ifndef STBI_NO_DDS
-#include "stbi_DDS_aug_c.h"
-#endif
-
diff --git a/src/SFML/Graphics/SOIL/.svn/text-base/stb_image_aug.h.svn-base b/src/SFML/Graphics/SOIL/.svn/text-base/stb_image_aug.h.svn-base deleted file mode 100644 index 279887a..0000000 --- a/src/SFML/Graphics/SOIL/.svn/text-base/stb_image_aug.h.svn-base +++ /dev/null @@ -1,329 +0,0 @@ -/* stbi-1.08 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c
- when you control the images you're loading
-
- QUICK NOTES:
- Primarily of interest to game developers and other people who can
- avoid problematic images and only need the trivial interface
-
- JPEG baseline (no JPEG progressive, no oddball channel decimations)
- PNG non-interlaced
- BMP non-1bpp, non-RLE
- TGA (not sure what subset, if a subset)
- PSD (composite view only, no extra channels)
- HDR (radiance rgbE format)
- writes BMP,TGA (define STBI_NO_WRITE to remove code)
- decoded from memory or through stdio FILE (define STBI_NO_STDIO to remove code)
-
- TODO:
- stbi_info_*
-
- history:
- 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz
- 1.07 attempt to fix C++ warning/errors again
- 1.06 attempt to fix C++ warning/errors again
- 1.05 fix TGA loading to return correct *comp and use good luminance calc
- 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free
- 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR
- 1.02 support for (subset of) HDR files, float interface for preferred access to them
- 1.01 fix bug: possible bug in handling right-side up bmps... not sure
- fix bug: the stbi_bmp_load() and stbi_tga_load() functions didn't work at all
- 1.00 interface to zlib that skips zlib header
- 0.99 correct handling of alpha in palette
- 0.98 TGA loader by lonesock; dynamically add loaders (untested)
- 0.97 jpeg errors on too large a file; also catch another malloc failure
- 0.96 fix detection of invalid v value - particleman@mollyrocket forum
- 0.95 during header scan, seek to markers in case of padding
- 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same
- 0.93 handle jpegtran output; verbose errors
- 0.92 read 4,8,16,24,32-bit BMP files of several formats
- 0.91 output 24-bit Windows 3.0 BMP files
- 0.90 fix a few more warnings; bump version number to approach 1.0
- 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd
- 0.60 fix compiling as c++
- 0.59 fix warnings: merge Dave Moore's -Wall fixes
- 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian
- 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less
- than 16 available
- 0.56 fix bug: zlib uncompressed mode len vs. nlen
- 0.55 fix bug: restart_interval not initialized to 0
- 0.54 allow NULL for 'int *comp'
- 0.53 fix bug in png 3->4; speedup png decoding
- 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments
- 0.51 obey req_comp requests, 1-component jpegs return as 1-component,
- on 'test' only check type, not whether we support this variant
-*/
-
-#ifndef HEADER_STB_IMAGE_AUGMENTED
-#define HEADER_STB_IMAGE_AUGMENTED
-
-//// begin header file ////////////////////////////////////////////////////
-//
-// Limitations:
-// - no progressive/interlaced support (jpeg, png)
-// - 8-bit samples only (jpeg, png)
-// - not threadsafe
-// - channel subsampling of at most 2 in each dimension (jpeg)
-// - no delayed line count (jpeg) -- IJG doesn't support either
-//
-// Basic usage (see HDR discussion below):
-// int x,y,n;
-// unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
-// // ... process data if not NULL ...
-// // ... x = width, y = height, n = # 8-bit components per pixel ...
-// // ... replace '0' with '1'..'4' to force that many components per pixel
-// stbi_image_free(data)
-//
-// Standard parameters:
-// int *x -- outputs image width in pixels
-// int *y -- outputs image height in pixels
-// int *comp -- outputs # of image components in image file
-// int req_comp -- if non-zero, # of image components requested in result
-//
-// The return value from an image loader is an 'unsigned char *' which points
-// to the pixel data. The pixel data consists of *y scanlines of *x pixels,
-// with each pixel consisting of N interleaved 8-bit components; the first
-// pixel pointed to is top-left-most in the image. There is no padding between
-// image scanlines or between pixels, regardless of format. The number of
-// components N is 'req_comp' if req_comp is non-zero, or *comp otherwise.
-// If req_comp is non-zero, *comp has the number of components that _would_
-// have been output otherwise. E.g. if you set req_comp to 4, you will always
-// get RGBA output, but you can check *comp to easily see if it's opaque.
-//
-// An output image with N components has the following components interleaved
-// in this order in each pixel:
-//
-// N=#comp components
-// 1 grey
-// 2 grey, alpha
-// 3 red, green, blue
-// 4 red, green, blue, alpha
-//
-// If image loading fails for any reason, the return value will be NULL,
-// and *x, *y, *comp will be unchanged. The function stbi_failure_reason()
-// can be queried for an extremely brief, end-user unfriendly explanation
-// of why the load failed. Define STBI_NO_FAILURE_STRINGS to avoid
-// compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
-// more user-friendly ones.
-//
-// Paletted PNG and BMP images are automatically depalettized.
-//
-//
-// ===========================================================================
-//
-// HDR image support (disable by defining STBI_NO_HDR)
-//
-// stb_image now supports loading HDR images in general, and currently
-// the Radiance .HDR file format, although the support is provided
-// generically. You can still load any file through the existing interface;
-// if you attempt to load an HDR file, it will be automatically remapped to
-// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
-// both of these constants can be reconfigured through this interface:
-//
-// stbi_hdr_to_ldr_gamma(2.2f);
-// stbi_hdr_to_ldr_scale(1.0f);
-//
-// (note, do not use _inverse_ constants; stbi_image will invert them
-// appropriately).
-//
-// Additionally, there is a new, parallel interface for loading files as
-// (linear) floats to preserve the full dynamic range:
-//
-// float *data = stbi_loadf(filename, &x, &y, &n, 0);
-//
-// If you load LDR images through this interface, those images will
-// be promoted to floating point values, run through the inverse of
-// constants corresponding to the above:
-//
-// stbi_ldr_to_hdr_scale(1.0f);
-// stbi_ldr_to_hdr_gamma(2.2f);
-//
-// Finally, given a filename (or an open file or memory block--see header
-// file for details) containing image data, you can query for the "most
-// appropriate" interface to use (that is, whether the image is HDR or
-// not), using:
-//
-// stbi_is_hdr(char *filename);
-
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif
-
-#ifndef STBI_NO_HDR
-#include <math.h> // ldexp
-#include <string.h> // strcmp
-#endif
-
-enum
-{
- STBI_default = 0, // only used for req_comp
-
- STBI_grey = 1,
- STBI_grey_alpha = 2,
- STBI_rgb = 3,
- STBI_rgb_alpha = 4,
-};
-
-typedef unsigned char stbi_uc;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// WRITING API
-
-#if !defined(STBI_NO_WRITE) && !defined(STBI_NO_STDIO)
-// write a BMP/TGA file given tightly packed 'comp' channels (no padding, nor bmp-stride-padding)
-// (you must include the appropriate extension in the filename).
-// returns TRUE on success, FALSE if couldn't open file, error writing file
-extern int stbi_write_bmp (char *filename, int x, int y, int comp, void *data);
-extern int stbi_write_tga (char *filename, int x, int y, int comp, void *data);
-#endif
-
-// PRIMARY API - works on images of any type
-
-// load image by filename, open file, or memory buffer
-#ifndef STBI_NO_STDIO
-extern stbi_uc *stbi_load (char *filename, int *x, int *y, int *comp, int req_comp);
-extern stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-extern int stbi_info_from_file (FILE *f, int *x, int *y, int *comp);
-#endif
-extern stbi_uc *stbi_load_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-// for stbi_load_from_file, file pointer is left pointing immediately after image
-
-#ifndef STBI_NO_HDR
-#ifndef STBI_NO_STDIO
-extern float *stbi_loadf (char *filename, int *x, int *y, int *comp, int req_comp);
-extern float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-#endif
-extern float *stbi_loadf_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-
-extern void stbi_hdr_to_ldr_gamma(float gamma);
-extern void stbi_hdr_to_ldr_scale(float scale);
-
-extern void stbi_ldr_to_hdr_gamma(float gamma);
-extern void stbi_ldr_to_hdr_scale(float scale);
-
-#endif // STBI_NO_HDR
-
-// get a VERY brief reason for failure
-extern char *stbi_failure_reason (void);
-
-// free the loaded image -- this is just free()
-extern void stbi_image_free (void *retval_from_stbi_load);
-
-// get image dimensions & components without fully decoding
-extern int stbi_info_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp);
-extern int stbi_is_hdr_from_memory(stbi_uc *buffer, int len);
-#ifndef STBI_NO_STDIO
-extern int stbi_info (char *filename, int *x, int *y, int *comp);
-extern int stbi_is_hdr (char *filename);
-extern int stbi_is_hdr_from_file(FILE *f);
-#endif
-
-// ZLIB client - used by PNG, available for other purposes
-
-extern char *stbi_zlib_decode_malloc_guesssize(int initial_size, int *outlen);
-extern char *stbi_zlib_decode_malloc(char *buffer, int len, int *outlen);
-extern int stbi_zlib_decode_buffer(char *obuffer, int olen, char *ibuffer, int ilen);
-
-extern char *stbi_zlib_decode_noheader_malloc(char *buffer, int len, int *outlen);
-extern int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, char *ibuffer, int ilen);
-
-
-// TYPE-SPECIFIC ACCESS
-
-// is it a jpeg?
-extern int stbi_jpeg_test_memory (stbi_uc *buffer, int len);
-extern stbi_uc *stbi_jpeg_load_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-extern int stbi_jpeg_info_from_memory(stbi_uc *buffer, int len, int *x, int *y, int *comp);
-
-#ifndef STBI_NO_STDIO
-extern stbi_uc *stbi_jpeg_load (char *filename, int *x, int *y, int *comp, int req_comp);
-extern int stbi_jpeg_test_file (FILE *f);
-extern stbi_uc *stbi_jpeg_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-
-extern int stbi_jpeg_info (char *filename, int *x, int *y, int *comp);
-extern int stbi_jpeg_info_from_file (FILE *f, int *x, int *y, int *comp);
-#endif
-
-extern int stbi_jpeg_dc_only; // only decode DC component
-
-// is it a png?
-extern int stbi_png_test_memory (stbi_uc *buffer, int len);
-extern stbi_uc *stbi_png_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-extern int stbi_png_info_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp);
-
-#ifndef STBI_NO_STDIO
-extern stbi_uc *stbi_png_load (char *filename, int *x, int *y, int *comp, int req_comp);
-extern int stbi_png_info (char *filename, int *x, int *y, int *comp);
-extern int stbi_png_test_file (FILE *f);
-extern stbi_uc *stbi_png_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-extern int stbi_png_info_from_file (FILE *f, int *x, int *y, int *comp);
-#endif
-
-// is it a bmp?
-extern int stbi_bmp_test_memory (stbi_uc *buffer, int len);
-
-extern stbi_uc *stbi_bmp_load (char *filename, int *x, int *y, int *comp, int req_comp);
-extern stbi_uc *stbi_bmp_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-#ifndef STBI_NO_STDIO
-extern int stbi_bmp_test_file (FILE *f);
-extern stbi_uc *stbi_bmp_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-#endif
-
-// is it a tga?
-extern int stbi_tga_test_memory (stbi_uc *buffer, int len);
-
-extern stbi_uc *stbi_tga_load (char *filename, int *x, int *y, int *comp, int req_comp);
-extern stbi_uc *stbi_tga_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-#ifndef STBI_NO_STDIO
-extern int stbi_tga_test_file (FILE *f);
-extern stbi_uc *stbi_tga_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-#endif
-
-// is it a psd?
-extern int stbi_psd_test_memory (stbi_uc *buffer, int len);
-
-extern stbi_uc *stbi_psd_load (char *filename, int *x, int *y, int *comp, int req_comp);
-extern stbi_uc *stbi_psd_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-#ifndef STBI_NO_STDIO
-extern int stbi_psd_test_file (FILE *f);
-extern stbi_uc *stbi_psd_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-#endif
-
-// is it an hdr?
-extern int stbi_hdr_test_memory (stbi_uc *buffer, int len);
-
-extern float * stbi_hdr_load (char *filename, int *x, int *y, int *comp, int req_comp);
-extern float * stbi_hdr_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-#ifndef STBI_NO_STDIO
-extern int stbi_hdr_test_file (FILE *f);
-extern float * stbi_hdr_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-#endif
-
-// define new loaders
-typedef struct
-{
- int (*test_memory)(stbi_uc *buffer, int len);
- stbi_uc * (*load_from_memory)(stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
- #ifndef STBI_NO_STDIO
- int (*test_file)(FILE *f);
- stbi_uc * (*load_from_file)(FILE *f, int *x, int *y, int *comp, int req_comp);
- #endif
-} stbi_loader;
-
-// register a loader by filling out the above structure (you must defined ALL functions)
-// returns 1 if added or already added, 0 if not added (too many loaders)
-extern int stbi_register_loader(stbi_loader *loader);
-
-#ifdef __cplusplus
-}
-#endif
-
-//
-//
-//// end header file /////////////////////////////////////////////////////
-
-#endif
-
diff --git a/src/SFML/Graphics/SOIL/.svn/text-base/stbi_DDS_aug.h.svn-base b/src/SFML/Graphics/SOIL/.svn/text-base/stbi_DDS_aug.h.svn-base deleted file mode 100644 index c53e1a3..0000000 --- a/src/SFML/Graphics/SOIL/.svn/text-base/stbi_DDS_aug.h.svn-base +++ /dev/null @@ -1,21 +0,0 @@ -/*
- adding DDS loading support to stbi
-*/
-
-#ifndef HEADER_STB_IMAGE_DDS_AUGMENTATION -#define HEADER_STB_IMAGE_DDS_AUGMENTATION
-
-// is it a DDS file?
-extern int stbi_dds_test_memory (stbi_uc *buffer, int len);
-
-extern stbi_uc *stbi_dds_load (char *filename, int *x, int *y, int *comp, int req_comp);
-extern stbi_uc *stbi_dds_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp);
-#ifndef STBI_NO_STDIO
-extern int stbi_dds_test_file (FILE *f);
-extern stbi_uc *stbi_dds_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-#endif
-
-//
-//
-//// end header file /////////////////////////////////////////////////////
-#endif // HEADER_STB_IMAGE_DDS_AUGMENTATION
diff --git a/src/SFML/Graphics/SOIL/.svn/text-base/stbi_DDS_aug_c.h.svn-base b/src/SFML/Graphics/SOIL/.svn/text-base/stbi_DDS_aug_c.h.svn-base deleted file mode 100644 index 024efd6..0000000 --- a/src/SFML/Graphics/SOIL/.svn/text-base/stbi_DDS_aug_c.h.svn-base +++ /dev/null @@ -1,507 +0,0 @@ -
-/// DDS file support, does decoding, _not_ direct uploading
-/// (use SOIL for that ;-)
-
-/// A bunch of DirectDraw Surface structures and flags
-typedef struct {
- unsigned int dwMagic;
- unsigned int dwSize;
- unsigned int dwFlags;
- unsigned int dwHeight;
- unsigned int dwWidth;
- unsigned int dwPitchOrLinearSize;
- unsigned int dwDepth;
- unsigned int dwMipMapCount;
- unsigned int dwReserved1[ 11 ];
-
- // DDPIXELFORMAT
- struct {
- unsigned int dwSize;
- unsigned int dwFlags;
- unsigned int dwFourCC;
- unsigned int dwRGBBitCount;
- unsigned int dwRBitMask;
- unsigned int dwGBitMask;
- unsigned int dwBBitMask;
- unsigned int dwAlphaBitMask;
- } sPixelFormat;
-
- // DDCAPS2
- struct {
- unsigned int dwCaps1;
- unsigned int dwCaps2;
- unsigned int dwDDSX;
- unsigned int dwReserved;
- } sCaps;
- unsigned int dwReserved2;
-} DDS_header ;
-
-// the following constants were copied directly off the MSDN website
-
-// The dwFlags member of the original DDSURFACEDESC2 structure
-// can be set to one or more of the following values.
-#define DDSD_CAPS 0x00000001
-#define DDSD_HEIGHT 0x00000002
-#define DDSD_WIDTH 0x00000004
-#define DDSD_PITCH 0x00000008
-#define DDSD_PIXELFORMAT 0x00001000
-#define DDSD_MIPMAPCOUNT 0x00020000
-#define DDSD_LINEARSIZE 0x00080000
-#define DDSD_DEPTH 0x00800000
-
-// DirectDraw Pixel Format
-#define DDPF_ALPHAPIXELS 0x00000001
-#define DDPF_FOURCC 0x00000004
-#define DDPF_RGB 0x00000040
-
-// The dwCaps1 member of the DDSCAPS2 structure can be
-// set to one or more of the following values.
-#define DDSCAPS_COMPLEX 0x00000008
-#define DDSCAPS_TEXTURE 0x00001000
-#define DDSCAPS_MIPMAP 0x00400000
-
-// The dwCaps2 member of the DDSCAPS2 structure can be
-// set to one or more of the following values.
-#define DDSCAPS2_CUBEMAP 0x00000200
-#define DDSCAPS2_CUBEMAP_POSITIVEX 0x00000400
-#define DDSCAPS2_CUBEMAP_NEGATIVEX 0x00000800
-#define DDSCAPS2_CUBEMAP_POSITIVEY 0x00001000
-#define DDSCAPS2_CUBEMAP_NEGATIVEY 0x00002000
-#define DDSCAPS2_CUBEMAP_POSITIVEZ 0x00004000
-#define DDSCAPS2_CUBEMAP_NEGATIVEZ 0x00008000
-#define DDSCAPS2_VOLUME 0x00200000
-
-static int dds_test(void)
-{
- // check the magic number
- if (get8() != 'D') return 0;
- if (get8() != 'D') return 0;
- if (get8() != 'S') return 0;
- if (get8() != ' ') return 0;
- // check header size
- if (get32le() != 124) return 0;
- return 1;
-}
-#ifndef STBI_NO_STDIO
-int stbi_dds_test_file (FILE *f)
-{
- int r,n = ftell(f);
- start_file(f);
- r = dds_test();
- fseek(f,n,SEEK_SET);
- return r;
-}
-#endif
-
-int stbi_dds_test_memory (stbi_uc *buffer, int len)
-{
- start_mem(buffer, len);
- return dds_test();
-}
-
-// helper functions
-int stbi_convert_bit_range( int c, int from_bits, int to_bits )
-{
- int b = (1 << (from_bits - 1)) + c * ((1 << to_bits) - 1);
- return (b + (b >> from_bits)) >> from_bits;
-}
-void stbi_rgb_888_from_565( unsigned int c, int *r, int *g, int *b )
-{
- *r = stbi_convert_bit_range( (c >> 11) & 31, 5, 8 );
- *g = stbi_convert_bit_range( (c >> 05) & 63, 6, 8 );
- *b = stbi_convert_bit_range( (c >> 00) & 31, 5, 8 );
-}
-void stbi_decode_DXT1_block(
- unsigned char uncompressed[16*4],
- unsigned char compressed[8] )
-{
- int next_bit = 4*8;
- int i, r, g, b;
- int c0, c1;
- unsigned char decode_colors[4*4];
- // find the 2 primary colors
- c0 = compressed[0] + (compressed[1] << 8);
- c1 = compressed[2] + (compressed[3] << 8);
- stbi_rgb_888_from_565( c0, &r, &g, &b );
- decode_colors[0] = r;
- decode_colors[1] = g;
- decode_colors[2] = b;
- decode_colors[3] = 255;
- stbi_rgb_888_from_565( c1, &r, &g, &b );
- decode_colors[4] = r;
- decode_colors[5] = g;
- decode_colors[6] = b;
- decode_colors[7] = 255;
- if( c0 > c1 )
- {
- // no alpha, 2 interpolated colors
- decode_colors[8] = (2*decode_colors[0] + decode_colors[4]) / 3;
- decode_colors[9] = (2*decode_colors[1] + decode_colors[5]) / 3;
- decode_colors[10] = (2*decode_colors[2] + decode_colors[6]) / 3;
- decode_colors[11] = 255;
- decode_colors[12] = (decode_colors[0] + 2*decode_colors[4]) / 3;
- decode_colors[13] = (decode_colors[1] + 2*decode_colors[5]) / 3;
- decode_colors[14] = (decode_colors[2] + 2*decode_colors[6]) / 3;
- decode_colors[15] = 255;
- } else
- {
- // 1 interpolated color, alpha
- decode_colors[8] = (decode_colors[0] + decode_colors[4]) / 2;
- decode_colors[9] = (decode_colors[1] + decode_colors[5]) / 2;
- decode_colors[10] = (decode_colors[2] + decode_colors[6]) / 2;
- decode_colors[11] = 255;
- decode_colors[12] = 0;
- decode_colors[13] = 0;
- decode_colors[14] = 0;
- decode_colors[15] = 0;
- }
- // decode the block
- for( i = 0; i < 16*4; i += 4 )
- {
- int idx = ((compressed[next_bit>>3] >> (next_bit & 7)) & 3) * 4;
- next_bit += 2;
- uncompressed[i+0] = decode_colors[idx+0];
- uncompressed[i+1] = decode_colors[idx+1];
- uncompressed[i+2] = decode_colors[idx+2];
- uncompressed[i+3] = decode_colors[idx+3];
- }
- // done
-}
-void stbi_decode_DXT23_alpha_block(
- unsigned char uncompressed[16*4],
- unsigned char compressed[8] )
-{
- int i, next_bit = 0;
- // each alpha value gets 4 bits
- for( i = 3; i < 16*4; i += 4 )
- {
- uncompressed[i] = stbi_convert_bit_range(
- (compressed[next_bit>>3] >> (next_bit&7)) & 15,
- 4, 8 );
- next_bit += 4;
- }
-}
-void stbi_decode_DXT45_alpha_block(
- unsigned char uncompressed[16*4],
- unsigned char compressed[8] )
-{
- int i, next_bit = 8*2;
- unsigned char decode_alpha[8];
- // each alpha value gets 3 bits, and the 1st 2 bytes are the range
- decode_alpha[0] = compressed[0];
- decode_alpha[1] = compressed[1];
- if( decode_alpha[0] > decode_alpha[1] )
- {
- // 6 step intermediate
- decode_alpha[2] = (6*decode_alpha[0] + 1*decode_alpha[1]) / 7;
- decode_alpha[3] = (5*decode_alpha[0] + 2*decode_alpha[1]) / 7;
- decode_alpha[4] = (4*decode_alpha[0] + 3*decode_alpha[1]) / 7;
- decode_alpha[5] = (3*decode_alpha[0] + 4*decode_alpha[1]) / 7;
- decode_alpha[6] = (2*decode_alpha[0] + 5*decode_alpha[1]) / 7;
- decode_alpha[7] = (1*decode_alpha[0] + 6*decode_alpha[1]) / 7;
- } else
- {
- // 4 step intermediate, pluss full and none
- decode_alpha[2] = (4*decode_alpha[0] + 1*decode_alpha[1]) / 5;
- decode_alpha[3] = (3*decode_alpha[0] + 2*decode_alpha[1]) / 5;
- decode_alpha[4] = (2*decode_alpha[0] + 3*decode_alpha[1]) / 5;
- decode_alpha[5] = (1*decode_alpha[0] + 4*decode_alpha[1]) / 5;
- decode_alpha[6] = 0;
- decode_alpha[7] = 255;
- }
- for( i = 3; i < 16*4; i += 4 )
- {
- int idx = 0, bit;
- bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1;
- idx += bit << 0;
- ++next_bit;
- bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1;
- idx += bit << 1;
- ++next_bit;
- bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1;
- idx += bit << 2;
- ++next_bit;
- uncompressed[i] = decode_alpha[idx & 7];
- }
- // done
-}
-void stbi_decode_DXT_color_block(
- unsigned char uncompressed[16*4],
- unsigned char compressed[8] )
-{
- int next_bit = 4*8;
- int i, r, g, b;
- int c0, c1;
- unsigned char decode_colors[4*3];
- // find the 2 primary colors
- c0 = compressed[0] + (compressed[1] << 8);
- c1 = compressed[2] + (compressed[3] << 8);
- stbi_rgb_888_from_565( c0, &r, &g, &b );
- decode_colors[0] = r;
- decode_colors[1] = g;
- decode_colors[2] = b;
- stbi_rgb_888_from_565( c1, &r, &g, &b );
- decode_colors[3] = r;
- decode_colors[4] = g;
- decode_colors[5] = b;
- // Like DXT1, but no choicees:
- // no alpha, 2 interpolated colors
- decode_colors[6] = (2*decode_colors[0] + decode_colors[3]) / 3;
- decode_colors[7] = (2*decode_colors[1] + decode_colors[4]) / 3;
- decode_colors[8] = (2*decode_colors[2] + decode_colors[5]) / 3;
- decode_colors[9] = (decode_colors[0] + 2*decode_colors[3]) / 3;
- decode_colors[10] = (decode_colors[1] + 2*decode_colors[4]) / 3;
- decode_colors[11] = (decode_colors[2] + 2*decode_colors[5]) / 3;
- // decode the block
- for( i = 0; i < 16*4; i += 4 )
- {
- int idx = ((compressed[next_bit>>3] >> (next_bit & 7)) & 3) * 3;
- next_bit += 2;
- uncompressed[i+0] = decode_colors[idx+0];
- uncompressed[i+1] = decode_colors[idx+1];
- uncompressed[i+2] = decode_colors[idx+2];
- }
- // done
-}
-static stbi_uc *dds_load(int *x, int *y, int *comp, int req_comp)
-{
- // all variables go up front
- stbi_uc *dds_data = NULL;
- stbi_uc block[16*4];
- stbi_uc compressed[8];
- int flags, DXT_family;
- int has_alpha, has_mipmap;
- int is_compressed, cubemap_faces;
- int block_pitch, num_blocks;
- DDS_header header;
- int i, sz, cf;
- // load the header
- if( sizeof( DDS_header ) != 128 )
- {
- return NULL;
- }
- getn( (stbi_uc*)(&header), 128 );
- // and do some checking
- if( header.dwMagic != (('D' << 0) | ('D' << 8) | ('S' << 16) | (' ' << 24)) ) return NULL;
- if( header.dwSize != 124 ) return NULL;
- flags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT;
- if( (header.dwFlags & flags) != flags ) return NULL;
- /* According to the MSDN spec, the dwFlags should contain
- DDSD_LINEARSIZE if it's compressed, or DDSD_PITCH if
- uncompressed. Some DDS writers do not conform to the
- spec, so I need to make my reader more tolerant */
- if( header.sPixelFormat.dwSize != 32 ) return NULL;
- flags = DDPF_FOURCC | DDPF_RGB;
- if( (header.sPixelFormat.dwFlags & flags) == 0 ) return NULL;
- if( (header.sCaps.dwCaps1 & DDSCAPS_TEXTURE) == 0 ) return NULL;
- // get the image data
- img_x = header.dwWidth;
- img_y = header.dwHeight;
- img_n = 4;
- is_compressed = (header.sPixelFormat.dwFlags & DDPF_FOURCC) / DDPF_FOURCC;
- has_alpha = (header.sPixelFormat.dwFlags & DDPF_ALPHAPIXELS) / DDPF_ALPHAPIXELS;
- has_mipmap = (header.sCaps.dwCaps1 & DDSCAPS_MIPMAP) && (header.dwMipMapCount > 1);
- cubemap_faces = (header.sCaps.dwCaps2 & DDSCAPS2_CUBEMAP) / DDSCAPS2_CUBEMAP;
- /* I need cubemaps to have square faces */
- cubemap_faces &= (img_x == img_y);
- cubemap_faces *= 5;
- cubemap_faces += 1;
- block_pitch = (img_x+3) >> 2;
- num_blocks = block_pitch * ((img_y+3) >> 2);
- /* let the user know what's going on */
- *x = img_x;
- *y = img_y;
- *comp = img_n;
- /* is this uncompressed? */
- if( is_compressed )
- {
- /* compressed */
- // note: header.sPixelFormat.dwFourCC is something like (('D'<<0)|('X'<<8)|('T'<<16)|('1'<<24))
- DXT_family = 1 + (header.sPixelFormat.dwFourCC >> 24) - '1';
- if( (DXT_family < 1) || (DXT_family > 5) ) return NULL;
- /* check the expected size...oops, nevermind...
- those non-compliant writers leave
- dwPitchOrLinearSize == 0 */
- // passed all the tests, get the RAM for decoding
- sz = (img_x)*(img_y)*4*cubemap_faces;
- dds_data = (unsigned char*)malloc( sz );
- /* do this once for each face */
- for( cf = 0; cf < cubemap_faces; ++ cf )
- {
- // now read and decode all the blocks
- for( i = 0; i < num_blocks; ++i )
- {
- // where are we?
- int bx, by, bw=4, bh=4;
- int ref_x = 4 * (i % block_pitch);
- int ref_y = 4 * (i / block_pitch);
- // get the next block's worth of compressed data, and decompress it
- if( DXT_family == 1 )
- {
- // DXT1
- getn( compressed, 8 );
- stbi_decode_DXT1_block( block, compressed );
- } else if( DXT_family < 4 )
- {
- // DXT2/3
- getn( compressed, 8 );
- stbi_decode_DXT23_alpha_block ( block, compressed );
- getn( compressed, 8 );
- stbi_decode_DXT_color_block ( block, compressed );
- } else
- {
- // DXT4/5
- getn( compressed, 8 );
- stbi_decode_DXT45_alpha_block ( block, compressed );
- getn( compressed, 8 );
- stbi_decode_DXT_color_block ( block, compressed );
- }
- // is this a partial block?
- if( ref_x + 4 > img_x )
- {
- bw = img_x - ref_x;
- }
- if( ref_y + 4 > img_y )
- {
- bh = img_y - ref_y;
- }
- // now drop our decompressed data into the buffer
- for( by = 0; by < bh; ++by )
- {
- int idx = 4*((ref_y+by+cf*img_x)*img_x + ref_x);
- for( bx = 0; bx < bw*4; ++bx )
- {
-
- dds_data[idx+bx] = block[by*16+bx];
- }
- }
- }
- /* done reading and decoding the main image...
- skip MIPmaps if present */
- if( has_mipmap )
- {
- int block_size = 16;
- if( DXT_family == 1 )
- {
- block_size = 8;
- }
- for( i = 1; i < header.dwMipMapCount; ++i )
- {
- int mx = img_x >> (i + 2);
- int my = img_y >> (i + 2);
- if( mx < 1 )
- {
- mx = 1;
- }
- if( my < 1 )
- {
- my = 1;
- }
- skip( mx*my*block_size );
- }
- }
- }/* per cubemap face */
- } else
- {
- /* uncompressed */
- DXT_family = 0;
- img_n = 3;
- if( has_alpha )
- {
- img_n = 4;
- }
- *comp = img_n;
- sz = img_x*img_y*img_n*cubemap_faces;
- dds_data = (unsigned char*)malloc( sz );
- /* do this once for each face */
- for( cf = 0; cf < cubemap_faces; ++ cf )
- {
- /* read the main image for this face */
- getn( &dds_data[cf*img_x*img_y*img_n], img_x*img_y*img_n );
- /* done reading and decoding the main image...
- skip MIPmaps if present */
- if( has_mipmap )
- {
- for( i = 1; i < header.dwMipMapCount; ++i )
- {
- int mx = img_x >> i;
- int my = img_y >> i;
- if( mx < 1 )
- {
- mx = 1;
- }
- if( my < 1 )
- {
- my = 1;
- }
- skip( mx*my*img_n );
- }
- }
- }
- /* data was BGR, I need it RGB */
- for( i = 0; i < sz; i += img_n )
- {
- unsigned char temp = dds_data[i];
- dds_data[i] = dds_data[i+2];
- dds_data[i+2] = temp;
- }
- }
- /* finished decompressing into RGBA,
- adjust the y size if we have a cubemap
- note: sz is already up to date */
- img_y *= cubemap_faces;
- *y = img_y;
- // did the user want something else, or
- // see if all the alpha values are 255 (i.e. no transparency)
- has_alpha = 0;
- if( img_n == 4)
- {
- for( i = 3; (i < sz) && (has_alpha == 0); i += 4 )
- {
- has_alpha |= (dds_data[i] < 255);
- }
- }
- if( (req_comp <= 4) && (req_comp >= 1) )
- {
- // user has some requirements, meet them
- if( req_comp != img_n )
- {
- dds_data = convert_format( dds_data, img_n, req_comp );
- *comp = img_n;
- }
- } else
- {
- // user had no requirements, only drop to RGB is no alpha
- if( (has_alpha == 0) && (img_n == 4) )
- {
- dds_data = convert_format( dds_data, 4, 3 );
- *comp = 3;
- }
- }
- // OK, done
- return dds_data;
-}
-
-#ifndef STBI_NO_STDIO
-stbi_uc *stbi_dds_load (char *filename, int *x, int *y, int *comp, int req_comp)
-{
- stbi_uc *data;
- FILE *f = fopen(filename, "rb");
- if (!f) return NULL;
- data = dds_load(x,y,comp,req_comp);
- fclose(f);
- return data;
-}
-
-stbi_uc *stbi_dds_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- start_file(f);
- return dds_load(x,y,comp,req_comp);
-}
-#endif
-
-stbi_uc *stbi_dds_load_from_memory (stbi_uc *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- start_mem(buffer, len);
- return dds_load(x,y,comp,req_comp);
-}
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