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76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
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/* loadpng.h */
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/* This file is hereby placed in the public domain. */
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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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/* 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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extern 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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extern int _png_compression_level;
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/* Load a PNG from disk. */
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extern BITMAP *load_png(AL_CONST char *filename, RGB *pal);
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/* Load a PNG from some place. */
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extern BITMAP *load_png_pf(PACKFILE *fp, RGB *pal);
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/* Load a PNG from memory. */
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extern 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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extern 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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extern 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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extern 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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extern 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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