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/*
* Buffer an Image
*
* Copyright 2007 Sascha Sommer <saschasommer@freenet.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gutenprint/gutenprint.h>
#include "gutenprint-internal.h"
struct buffered_image_priv
{
stp_image_t* image;
unsigned char** buf;
unsigned int flags;
};
static void
buffered_image_init(stp_image_t* image)
{
struct buffered_image_priv *priv = image->rep;
if(priv->image->init)
priv->image->init(priv->image);
}
static int
buffered_image_width(stp_image_t * image)
{
struct buffered_image_priv *priv = image->rep;
return priv->image->width(priv->image);
}
static int
buffered_image_height(stp_image_t * image)
{
struct buffered_image_priv *priv = image->rep;
return priv->image->height(priv->image);
}
static const char *
buffered_image_get_appname(stp_image_t *image)
{
struct buffered_image_priv *priv = image->rep;
return priv->image->get_appname(priv->image);
}
static stp_image_status_t
buffered_image_get_row(stp_image_t* image,unsigned char *data, size_t byte_limit, int row)
{
struct buffered_image_priv *priv = image->rep;
int width = buffered_image_width(image);
int height = buffered_image_height(image);
/* FIXME this will break with padding bytes */
int bytes_per_pixel = byte_limit / width;
int inc = bytes_per_pixel;
unsigned char* src;
int i;
/* fill buffer */
if(!priv->buf){
priv->buf = stp_zalloc((sizeof(unsigned short*) + 1) * height);
if(!priv->buf){
return STP_IMAGE_STATUS_ABORT;
}
for(i=0;i<height;i++){
priv->buf[i] = stp_malloc(byte_limit);
if(STP_IMAGE_STATUS_OK != priv->image->get_row(priv->image,priv->buf[i],byte_limit,i))
return STP_IMAGE_STATUS_ABORT;
}
}
if(priv->flags & BUFFER_FLAG_FLIP_Y)
row = height - row - 1;
src = priv->buf[row];
if(priv->flags & BUFFER_FLAG_FLIP_X){
src += byte_limit - bytes_per_pixel;
inc = -bytes_per_pixel;
}
/* copy data */
for( i = 0 ; i < width ; i++){
memcpy(data,src,bytes_per_pixel);
src += inc;
data += bytes_per_pixel;
}
return STP_IMAGE_STATUS_OK;
}
static void
buffered_image_conclude(stp_image_t * image)
{
struct buffered_image_priv *priv = image->rep;
if(priv->buf){
int i = 0;
while(priv->buf[i]){
stp_free(priv->buf[i]);
++i;
}
stp_free(priv->buf);
priv->buf = NULL;
}
if(priv->image->conclude)
priv->image->conclude(priv->image);
stp_free(priv);
stp_free(image);
}
stp_image_t*
stpi_buffer_image(stp_image_t* image, unsigned int flags)
{
struct buffered_image_priv *priv;
stp_image_t* buffered_image = stp_zalloc(sizeof(stp_image_t));
if(!buffered_image){
return NULL;
}
priv = buffered_image->rep = stp_zalloc(sizeof(struct buffered_image_priv));
if(!priv){
stp_free(buffered_image);
return NULL;
}
if(image->init)
buffered_image->init = buffered_image_init;
buffered_image->width = buffered_image_width;
buffered_image->height = buffered_image_height;
buffered_image->get_row = buffered_image_get_row;
buffered_image->conclude = buffered_image_conclude;
priv->image = image;
priv->flags = flags;
if(image->get_appname)
buffered_image->get_appname = buffered_image_get_appname;
return buffered_image;
}
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