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typedef struct Rawimage Rawimage;
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struct Rawimage
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{
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Rectangle r;
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uchar *cmap;
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int cmaplen;
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int nchans;
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uchar *chans[4];
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int chandesc;
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int chanlen;
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int fields; /* defined by format */
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int gifflags; /* gif only; graphics control extension flag word */
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int gifdelay; /* gif only; graphics control extension delay in cs */
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int giftrindex; /* gif only; graphics control extension transparency index */
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int gifloopcount; /* number of times to loop in animation; 0 means forever */
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};
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enum
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{
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/* Channel descriptors */
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CRGB = 0, /* three channels, no map */
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CYCbCr = 1, /* three channels, no map, level-shifted 601 color space */
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CY = 2, /* one channel, luminance */
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CRGB1 = 3, /* one channel, map present */
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CRGBV = 4, /* one channel, map is RGBV, understood */
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CRGB24 = 5, /* one channel in correct data order for loadimage(RGB24) */
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CRGBA32 = 6, /* one channel in correct data order for loadimage(RGBA32) */
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CYA16 = 7, /* one channel in correct data order for loadimage(Grey8+Alpha8) */
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CRGBVA16= 8, /* one channel in correct data order for loadimage(CMAP8+Alpha8) */
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/* GIF flags */
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TRANSP = 1,
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INPUT = 2,
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DISPMASK = 7<<2
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};
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enum{ /* PNG flags */
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II_GAMMA = 1 << 0,
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II_COMMENT = 1 << 1,
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};
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typedef struct ImageInfo {
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ulong fields_set;
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double gamma;
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char *comment;
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} ImageInfo;
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Rawimage** readjpg(int, int);
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Rawimage** Breadjpg(Biobuf *b, int);
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Rawimage** readpng(int, int);
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Rawimage** Breadpng(Biobuf *b, int);
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Rawimage** readgif(int, int);
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Rawimage** readpixmap(int, int);
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Rawimage* torgbv(Rawimage*, int);
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Rawimage* totruecolor(Rawimage*, int);
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int writerawimage(int, Rawimage*);
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void* _remaperror(char*, ...);
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typedef struct Memimage Memimage; /* avoid necessity to include memdraw.h */
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char* startgif(Biobuf*, Image*, int);
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char* writegif(Biobuf*, Image*, char*, int, int);
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void endgif(Biobuf*);
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char* memstartgif(Biobuf*, Memimage*, int);
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char* memwritegif(Biobuf*, Memimage*, char*, int, int);
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void memendgif(Biobuf*);
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Image* onechan(Image*);
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Memimage* memonechan(Memimage*);
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char* writeppm(Biobuf*, Image*, char*);
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char* memwriteppm(Biobuf*, Memimage*, char*);
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Image* multichan(Image*);
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Memimage* memmultichan(Memimage*);
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char* memwritepng(Biobuf*, Memimage*, ImageInfo*);
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