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