tif: add tiff decoder

sys/man/1/jpg

@@ -1,6 +1,6 @@
 .TH JPG 1
 .SH NAME
-jpg, gif, png, ppm, bmp, v210, yuv, ico, tga, tojpg, togeordi, togif, toppm, topng, toico \- view and convert pictures
+jpg, gif, png, tif, ppm, bmp, v210, yuv, ico, tga, tojpg, togeordi, togif, toppm, topng, toico \- view and convert pictures
 .SH SYNOPSIS
 .B jpg
 [
@@ -23,6 +23,13 @@ jpg, gif, png, ppm, bmp, v210, yuv, ico, tga, tojpg, togeordi, togif, toppm, top
 .I file ...
 ]
 .br
+.B tif
+[
+.B -39cdektv
+] [
+.I file ...
+]
+.br
 .B ppm
 [
 .B -39cdektv
@@ -137,6 +144,7 @@ These programs read, display, and write image files in public formats.
 .IR Jpg ,
 .IR gif ,
 .IR png ,
+.IR tif ,
 .IR ppm ,
 .IR bmp ,
 .IR tga ,
@@ -156,8 +164,14 @@ read Plan 9 images files, convert them to JPEG, GIF, PPM, or PNG, and write them
 The default behavior of
 .IR jpg ,
 .IR gif ,
+.IR png ,
+.IR tif ,
+.IR ppm ,
+.IR bmp ,
+.IR tga ,
+.IR v210 ,
 and
-.IR ppm
+.IR yuv
 is to display the
 .IR file ,
 or standard input if no file is named.
@@ -227,11 +241,12 @@ The input is a motion JPEG file, with multiple images representing frames of the
 .PP
 The
 .IR tojpg ,
-.IR togif
+.IR togif ,
-and
 .IR toppm
-programs go the other way: they convert from Plan 9 images to JPEG, GIF and PPM,
+and
-and have no display capability.
+.IR topng
+programs go the other way: they convert from Plan 9 images to JPEG, GIF,
+PPM and PNG and have no display capability.
 They all accept an option
 .B -c
 to set the comment field of the resulting file.
@@ -323,6 +338,8 @@ space in the image.  The icon file is written to standard output.
 .br
 .B http://www.w3.org/TR/2003/REC-PNG-20031110
 .br
+.B http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf
+.br
 .B http://netpbm.sourceforge.net/doc/ppm.html
 .br
 .B http://en.wikipedia.org/wiki/Windows_bitmap

sys/src/cmd/jpg/imagefile.h

@@ -50,9 +50,11 @@ typedef struct ImageInfo {
 
 
 Rawimage**	readjpg(int, int);
-Rawimage**	Breadjpg(Biobuf *b, int);
+Rawimage**	Breadjpg(Biobuf*, int);
 Rawimage**	readpng(int, int);
-Rawimage**	Breadpng(Biobuf *b, int);
+Rawimage**	Breadpng(Biobuf*, int);
+Rawimage**	readtif(int);
+Rawimage**	Breadtif(Biobuf*);
 Rawimage**	readgif(int, int);
 Rawimage**	readpixmap(int, int);
 Rawimage*	torgbv(Rawimage*, int);

sys/src/cmd/jpg/mkfile

@@ -9,6 +9,7 @@ TARG=\
 	toppm\
 	png\
 	topng\
+	tif\
 	yuv\
 	ico\
 	toico\
@@ -55,6 +56,7 @@ $O.ppm:		$IMFILES readppm.$O ppm.$O
 $O.toppm:	writeppm.$O multichan.$O toppm.$O
 $O.png:		$IMFILES readpng.$O png.$O
 $O.topng:	writepng.$O topng.$O
+$O.tif:		$IMFILES readtif.$O tif.$O
 $O.yuv:		$IMFILES readyuv.$O yuv.$O
 $O.bmp:		$IMFILES readbmp.$O bmp.$O
 $O.v210:	$IMFILES readv210.$O v210.$O

sys/src/cmd/jpg/tif.c

@@ -0,0 +1,251 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <draw.h>
+#include <event.h>
+#include "imagefile.h"
+
+int cflag = 0;
+int dflag = 0;
+int eflag = 0;
+int nineflag = 0;
+int threeflag = 0;
+int output = 0;
+Image *image;
+int defaultcolor = 1;
+
+enum {
+	Border = 2,
+	Edge = 5
+};
+
+int init(void);
+char *show(int, char *, int);
+
+void
+eresized(int new)
+{
+	Rectangle r;
+
+	if(new && getwindow(display, Refnone) < 0)
+		sysfatal("getwindow: %r");
+	if(image == nil)
+		return;
+	r = insetrect(screen->clipr, Edge+Border);
+	r.max.x = r.min.x + Dx(image->r);
+	r.max.y = r.min.y + Dy(image->r);
+	border(screen, r, -Border, nil, ZP);
+	drawop(screen, r, image, nil, image->r.min, S);
+	flushimage(display, 1);
+}
+
+void
+usage(void)
+{
+	fprint(2, "usage: %s [-39cdektv] [file.tif ...]\n", argv0);
+	exits("usage");
+}
+
+void
+main(int argc, char *argv[])
+{
+	int fd, i;
+	char *err;
+	ulong outchan;
+
+	outchan = CMAP8;
+	ARGBEGIN {
+	/*
+	* produce encoded, compressed, bitmap file;
+	* no display by default
+	*/
+	case 'c':
+		cflag++;
+		dflag++;
+		output++;
+		if(defaultcolor)
+			outchan = CMAP8;
+		break;
+	/* suppress display of image */
+	case 'd':
+		dflag++;
+		break;
+	/* disable floyd-steinberg error diffusion */
+	case 'e':
+		eflag++;
+		break;
+	/* force black and white */
+	case 'k':
+		defaultcolor = 0;
+		outchan = GREY8;
+		break;
+	/*
+	* produce encoded, compressed, three-color
+	* bitmap file; no display by default
+	*/
+	case '3':
+		threeflag++;
+		/* fall through */
+	/*
+	* produce encoded, compressed, true-color
+	* bitmap file; no display by default
+	*/
+	case 't':
+		cflag++;
+		dflag++;
+		output++;
+		defaultcolor = 0;
+		outchan = RGB24;
+		break;
+	/* force RGBV */
+	case 'v':
+		defaultcolor = 0;
+		outchan = CMAP8;
+		break;
+	/*
+	* produce plan 9, uncompressed, bitmap file;
+	* no display by default
+	*/
+	case '9':
+		nineflag++;
+		dflag++;
+		output++;
+		if(defaultcolor)
+			outchan = CMAP8;
+		break;
+	default:
+		usage();
+	} ARGEND
+
+	if(argc <= 0)
+		exits(show(0, "<stdin>", outchan));
+	err = nil;
+	for(i = 0; i < argc; i++) {
+		if((fd = open(argv[i], OREAD)) < 0) {
+			fprint(2, "%s: open %s: %r\n",
+				argv0, argv[i]);
+			err = "open";
+		} else {
+			err = show(fd, argv[i], outchan);
+			close(fd);
+		}
+		if((nineflag || cflag) && argc > 1 && err == nil) {
+			fprint(2, "%s: exiting after one file\n",
+				argv0);
+			break;
+		}
+	}
+	exits(err);
+}
+
+int
+init(void)
+{
+	static int inited = 0;
+
+	if(!inited) {
+		if(initdraw(0, 0, 0) < 0) {
+			fprint(2, "%s: initdraw: %r", argv0);
+			return -1;
+		}
+		einit(Ekeyboard|Emouse);
+		inited++;
+	}
+	return 0;
+}
+
+char *
+show(int fd, char *name, int outchan)
+{
+	Rawimage **array, *r, *c;
+	Image *i;
+	int j, ch;
+	Biobuf b;
+	char buf[32];
+
+	if(Binit(&b, fd, OREAD) < 0)
+		return nil;
+	array = Breadtif(&b);
+	if(array == nil || array[0] == nil) {
+		if(array != nil)
+			free(array);
+		fprint(2, "%s: decode %s failed: %r\n", argv0,
+			name);
+		return "decode";
+	}
+	Bterm(&b);
+	if(!dflag) {
+		if(init() < 0)
+			return "initdraw";
+/* fixme: ppm doesn't check for outchan==CMAP8 */
+		if(defaultcolor && screen->depth > 8 &&
+			outchan == CMAP8)
+			outchan = RGB24;
+	}
+	r = array[0];
+	if(outchan != CMAP8) {
+		switch(r->chandesc) {
+		case CY:
+			outchan = GREY8;
+			break;
+		case CRGB24:
+			outchan = RGB24;
+			break;
+		}
+		c = r;
+	} else if((c = torgbv(r, !eflag)) == nil) {
+		fprint(2, "%s: conversion of %s failed: %r\n",
+			argv0, name);
+		return "torgbv";
+	}
+	if(!dflag) {
+		i = allocimage(display, c->r, outchan, 0, 0);
+		if(i == nil) {
+			fprint(2, "%s: allocimage %s: %r\n",
+				argv0, name);
+			return "allocimage";
+		}
+		if(loadimage(i, i->r, c->chans[0],
+			c->chanlen) < 0) {
+			fprint(2, "%s: loadimage %s: %r\n",
+				argv0, name);
+			return "loadimage";
+		}
+		image = i;
+		eresized(0);
+		ch = ekbd();
+		if(ch == 'q' || ch == 0x7f || ch == 0x04)
+			exits(nil);
+		draw(screen, screen->clipr, display->white,
+			nil, ZP);
+		image = nil;
+		freeimage(i);
+	}
+	if(nineflag) {
+		chantostr(buf, outchan);
+		print("%11s %11d %11d %11d %11d ", buf,
+			c->r.min.x, c->r.min.y,
+			c->r.max.x, c->r.max.y);
+		if(write(1, c->chans[0], c->chanlen) !=
+			c->chanlen) {
+			fprint(2, "%s: %s: write error: %r\n",
+				argv0, name);
+			return "write";
+		}
+	} else if(cflag) {
+		if(writerawimage(1, c) < 0) {
+			fprint(2, "%s: %s: write error: %r\n",
+				argv0, name);
+			return "write";
+		}
+	}
+	if(c != nil && c != r) {
+		free(c->chans[0]);
+		free(c);
+	}
+	for(j = 0; j < r->nchans; j++)
+		free(r->chans[j]);
+	free(r);
+	free(array);
+	return nil;
+}

sys/src/cmd/page.c

@@ -680,6 +680,7 @@ popenfile(Page *p)
 	"image/gif",			popenimg,	"gif",
 	"image/jpeg",			popenimg,	"jpg",
 	"image/png",			popenimg,	"png",
+	"image/tiff",			popenimg,	"tif",
 	"image/ppm",			popenimg,	"ppm",
 	"image/bmp",			popenimg,	"bmp",
 	"image/tga",			popenimg,	"tga",