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/* babl - dynamically extendable universal pixel conversion library.
* Copyright (C) 2005-2008, Øyvind Kolås and others.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see
* <https://www.gnu.org/licenses/>.
*/
#ifndef _BABL_FISH_H
#define _BABL_FISH_H
/****************************************************************/
/* BablFish */
BABL_CLASS_DECLARE (fish);
/* BablFish, common base class for various fishes.
*/
typedef struct
{
BablInstance instance;
const Babl *source;
const Babl *destination;
void (*dispatch) (const Babl *babl, const char *src, char *dst, long n, void *data);
void **data; /* user data - only used for conversion redirect */
long pixels; /* number of pixels translates */
double error; /* the amount of noise introduced by the fish */
/* instrumentation */
} BablFish;
/* BablFishSimple is the simplest type of fish, wrapping a single
* conversion function, (note this might not be the optimal chosen
* conversion even if it exists), these fishes are used internally for
* instance in reference fishes.
*/
typedef struct
{
BablFish fish;
BablConversion *conversion;
double cost; /* number of ticks *10 + chain_length */
int source_bpp;
int dest_bpp;
void *foo;
} BablFishSimple;
/* BablFishPath is a combination of registered conversions, both
* from the reference types / model conversions, and optimized format to
* format conversion.
*
* This is the most advanced scheduled species of fish, some future
* version of babl might even be evovling path fishes in a background
* thread, based on the fish instrumentation. For this to work in a future
* version transmogrification between the fish classes would be used.
*/
typedef struct
{
BablFish fish;
double cost; /* number of ticks *10 + chain_length */
int source_bpp;
int dest_bpp;
unsigned int is_u8_color_conv:1; // keep track of count, and make
uint32_t *u8_lut;
long last_lut_use;
BablList *conversion_list;
} BablFishPath;
/* BablFishReference
*
* A BablFishReference is not intended to be fast, thus the algorithm
* encoded can use a multi stage approach, based on the knowledge babl
* has encoded in the pixel formats.
*
* One of the contributions that would be welcome are new fish factories.
*
* TODO:
* * make optimal use of a single allocation containing enough space
* for the maximum amount of memory needed in two adjecant buffers
* at any time.
*/
typedef struct
{
BablFish fish;
} BablFishReference;
#endif
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