aseprite/third_party/loadpng/loadpng.h

94 lines
2.7 KiB
C

/* loadpng.h */
#ifndef _included_loadpng_h_
#define _included_loadpng_h_
#ifdef __cplusplus
extern "C" {
#endif
#if (defined LOADPNG_DYNAMIC) && (defined ALLEGRO_WINDOWS)
#ifdef LOADPNG_SRC_BUILD
#define _APNG_DLL __declspec(dllexport)
#else
#define _APNG_DLL __declspec(dllimport)
#endif /* ALLEGRO_GL_SRC_BUILD */
#else
#define _APNG_DLL
#endif /* (defined LOADPNG_DYNAMIC) && (defined ALLEGRO_WINDOWS) */
#define APNG_VAR(type, name) extern _APNG_DLL type name
#if (defined LOADPNG_DYNAMIC) && (defined ALLEGRO_WINDOWS)
#define APNG_FUNC(type, name, args) extern _APNG_DLL type __cdecl name args
#else
#define APNG_FUNC(type, name, args) extern type name args
#endif /* (defined LOADPNG_DYNAMIC) && (defined ALLEGRO_WINDOWS) */
/* Overkill :-) */
#define LOADPNG_VERSION 1
#define LOADPNG_SUBVERSION 5
#define LOADPNG_VERSIONSTR "1.5"
/* _png_screen_gamma is slightly overloaded (sorry):
*
* A value of 0.0 means: Don't do any gamma correction in load_png()
* and load_memory_png(). This meaning was introduced in v1.4.
*
* A value of -1.0 means: Use the value from the environment variable
* SCREEN_GAMMA (if available), otherwise fallback to a value of 2.2
* (a good guess for PC monitors, and the value for sRGB colourspace).
* This is the default.
*
* Otherwise, the value of _png_screen_gamma is taken as-is.
*/
APNG_VAR(double, _png_screen_gamma);
/* Choose zlib compression level for saving file.
* Default is Z_BEST_COMPRESSION.
*/
APNG_VAR(int, _png_compression_level);
/* Load a PNG from disk. */
APNG_FUNC(BITMAP *, load_png, (AL_CONST char *filename, RGB *pal));
/* Load a PNG from some place. */
APNG_FUNC(BITMAP *, load_png_pf, (PACKFILE *fp, RGB *pal));
/* Load a PNG from memory. */
APNG_FUNC(BITMAP *, load_memory_png, (AL_CONST void *buffer, int buffer_size, RGB *pal));
/* Save a bitmap to disk in PNG format. */
APNG_FUNC(int, save_png, (AL_CONST char *filename, BITMAP *bmp, AL_CONST RGB *pal));
/* Adds `PNG' to Allegro's internal file type table.
* You can then just use load_bitmap and save_bitmap as usual.
*/
APNG_FUNC(void, register_png_file_type, (void));
/* Register an datafile type ID with Allegro, so that when an object
* with that type ID is encountered while loading a datafile, that
* object will be loaded as a PNG file.
*/
APNG_FUNC(void, register_png_datafile_object, (int id));
/* This is supposed to resemble jpgalleg_init in JPGalleg 2.0, just in
* case you are lazier than lazy. It contains these 3 lines of code:
* register_png_datafile_object(DAT_ID('P','N','G',' '));
* register_png_file_type();
* return 0;
*/
APNG_FUNC(int, loadpng_init, (void));
#ifdef __cplusplus
}
#endif
#endif /* _included_loadpng_h */