From 28994509cc11ac6a5443054dfae1fedfb69039bc Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Wed, 21 Apr 2004 22:19:33 +0000
Subject: Why not?

---
 src/cmd/jpg/imagefile.h | 82 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 src/cmd/jpg/imagefile.h

(limited to 'src/cmd/jpg/imagefile.h')

diff --git a/src/cmd/jpg/imagefile.h b/src/cmd/jpg/imagefile.h
new file mode 100644
index 00000000..592c5a2e
--- /dev/null
+++ b/src/cmd/jpg/imagefile.h
@@ -0,0 +1,82 @@
+typedef struct Rawimage Rawimage;
+
+struct Rawimage
+{
+	Rectangle	r;
+	uchar	*cmap;
+	int		cmaplen;
+	int		nchans;
+	uchar	*chans[4];
+	int		chandesc;
+	int		chanlen;
+
+	int		fields;    	/* defined by format */
+	int		gifflags;	/* gif only; graphics control extension flag word */
+	int		gifdelay;	/* gif only; graphics control extension delay in cs */
+	int		giftrindex;	/* gif only; graphics control extension transparency index */
+	int		gifloopcount;	/* number of times to loop in animation; 0 means forever */
+};
+
+enum
+{
+	/* Channel descriptors */
+	CRGB	= 0,	/* three channels, no map */
+	CYCbCr	= 1,	/* three channels, no map, level-shifted 601 color space */
+	CY	= 2,	/* one channel, luminance */
+	CRGB1	= 3,	/* one channel, map present */
+	CRGBV	= 4,	/* one channel, map is RGBV, understood */
+	CRGB24	= 5,	/* one channel in correct data order for loadimage(RGB24) */
+	CRGBA32	= 6,	/* one channel in correct data order for loadimage(RGBA32) */
+	CYA16	= 7,	/* one channel in correct data order for loadimage(Grey8+Alpha8) */
+	CRGBVA16= 8,	/* one channel in correct data order for loadimage(CMAP8+Alpha8) */
+
+	/* GIF flags */
+	TRANSP	= 1,
+	INPUT	= 2,
+	DISPMASK = 7<<2
+};
+
+
+enum{	/* PNG flags */
+	II_GAMMA =	1 << 0,
+	II_COMMENT =	1 << 1,
+};
+
+typedef struct ImageInfo {
+	ulong	fields_set;
+	double	gamma;
+	char	*comment;
+} ImageInfo;
+
+
+Rawimage**	readjpg(int, int);
+Rawimage**	Breadjpg(Biobuf *b, int);
+Rawimage**	readpng(int, int);
+Rawimage**	Breadpng(Biobuf *b, int);
+Rawimage**	readgif(int, int);
+Rawimage**	readpixmap(int, int);
+Rawimage*	torgbv(Rawimage*, int);
+Rawimage*	totruecolor(Rawimage*, int);
+int		writerawimage(int, Rawimage*);
+void*		_remaperror(char*, ...);
+
+#ifndef _MEMDRAW_H_
+typedef struct Memimage Memimage;	/* avoid necessity to include memdraw.h */
+#endif
+
+char*		startgif(Biobuf*, Image*, int);
+char*		writegif(Biobuf*, Image*, char*, int, int);
+void		endgif(Biobuf*);
+char*		memstartgif(Biobuf*, Memimage*, int);
+char*		memwritegif(Biobuf*, Memimage*, char*, int, int);
+void		memendgif(Biobuf*);
+Image*		onechan(Image*);
+Memimage*	memonechan(Memimage*);
+
+char*		writeppm(Biobuf*, Image*, char*);
+char*		memwriteppm(Biobuf*, Memimage*, char*);
+Image*		multichan(Image*);
+Memimage*	memmultichan(Memimage*);
+
+char*		memwritepng(Biobuf*, Memimage*, ImageInfo*);
+extern int drawlog2[];
-- 
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