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/yuv.c | 211 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 211 insertions(+)
 create mode 100644 src/cmd/jpg/yuv.c

(limited to 'src/cmd/jpg/yuv.c')

diff --git a/src/cmd/jpg/yuv.c b/src/cmd/jpg/yuv.c
new file mode 100644
index 00000000..929ccf39
--- /dev/null
+++ b/src/cmd/jpg/yuv.c
@@ -0,0 +1,211 @@
+#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;
+ulong	outchan = CMAP8;
+int		defaultcolor = 1;
+Image	*image;
+
+enum{
+	Border	= 2,
+	Edge		= 5
+};
+
+char	*show(int, char*);
+
+Rawimage** readyuv(int fd, int colorspace);
+
+void
+eresized(int new)
+{
+	Rectangle r;
+
+	if(new && getwindow(display, Refnone) < 0){
+		fprint(2, "yuv: can't reattach to window\n");
+		exits("resize");
+	}
+	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);
+	draw(screen, r, image, nil, image->r.min);
+	flushimage(display, 1);
+}
+
+void
+main(int argc, char *argv[])
+{
+	int fd, i;
+	char *err;
+
+	ARGBEGIN{
+	case '3':		/* produce encoded, compressed, three-color bitmap file; no display by default */
+		threeflag++;
+		/* fall through */
+	case 't':		/* produce encoded, compressed, true-color bitmap file; no display by default */
+		cflag++;
+		dflag++;
+		output++;
+		defaultcolor = 0;
+		outchan = RGB24;
+		break;
+	case 'c':		/* produce encoded, compressed, bitmap file; no display by default */
+		cflag++;
+		dflag++;
+		output++;
+		if(defaultcolor)
+			outchan = CMAP8;
+		break;
+	case 'd':		/* suppress display of image */
+		dflag++;
+		break;
+	case 'e':		/* disable floyd-steinberg error diffusion */
+		eflag++;
+		break;
+	case 'k':		/* force black and white */
+		defaultcolor = 0;
+		outchan = GREY8;
+		break;
+	case 'v':		/* force RGBV */
+		defaultcolor = 0;
+		outchan = CMAP8;
+		break;
+	case '9':		/* produce plan 9, uncompressed, bitmap file; no display by default */
+		nineflag++;
+		dflag++;
+		output++;
+		if(defaultcolor)
+			outchan = CMAP8;
+		break;
+	default:
+		fprint(2, "usage: yuv -39cdektv  [file.yuv ...]\n");
+		exits("usage");
+	}ARGEND;
+
+	err = nil;
+	if(argc == 0)
+		err = show(0, "<stdin>");
+	else{
+		for(i=0; i<argc; i++){
+			fd = open(argv[i], OREAD);
+			if(fd < 0){
+				fprint(2, "yuv: can't open %s: %r\n", argv[i]);
+				err = "open";
+			}else{
+				err = show(fd, argv[i]);
+				close(fd);
+			}
+			if((nineflag || cflag) && argc>1 && err==nil){
+				fprint(2, "yuv: exiting after one file\n");
+				break;
+			}
+		}
+	}
+	exits(err);
+}
+
+int
+init(void)
+{
+	static int inited;
+
+	if(inited == 0){
+		if(initdraw(0, 0, 0) < 0){
+			fprint(2, "yuv: initdraw failed: %r");
+			return -1;
+		}
+		einit(Ekeyboard|Emouse);
+		inited++;
+	}
+	return 1;
+}
+
+char*
+show(int fd, char *name)
+{
+	Rawimage **array, *r, *c;
+	Image *i;
+	int j, ch;
+	char buf[32];
+
+	array = readyuv(fd, CYCbCr);
+	if(array == nil || array[0]==nil){
+		fprint(2, "yuv: decode %s failed: %r\n", name);
+		return "decode";
+	}
+	if(!dflag){
+		if(init() < 0)
+			return "initdraw";
+		if(defaultcolor && screen->depth>8)
+			outchan = RGB24;
+	}
+	r = array[0];
+	if(outchan == CMAP8)
+		c = torgbv(r, !eflag);
+	else{
+		if(outchan==GREY8 || (r->chandesc==CY && threeflag==0))
+			c = totruecolor(r, CY);
+		else
+			c = totruecolor(r, CRGB24);
+	}
+	if(c == nil){
+		fprint(2, "yuv: converting %s to local format failed: %r\n", name);
+		return "torgbv";
+	}
+	if(!dflag){
+		if(r->chandesc == CY)
+			i = allocimage(display, c->r, GREY8, 0, 0);
+		else
+			i = allocimage(display, c->r, outchan, 0, 0);
+		if(i == nil){
+			fprint(2, "yuv: allocimage %s failed: %r\n", name);
+			return "allocimage";
+		}
+		if(loadimage(i, i->r, c->chans[0], c->chanlen) < 0){
+			fprint(2, "yuv: loadimage %s failed: %r\n", name);
+			return "loadimage";
+		}
+		image = i;
+		eresized(0);
+		if((ch=ekbd())=='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, "yuv: %s: write error %r\n", name);
+			return "write";
+		}
+	}else if(cflag){
+		if(writerawimage(1, c) < 0){
+			fprint(2, "yuv: %s: write error: %r\n", name);
+			return "write";
+		}
+	}
+	for(j=0; j<r->nchans; j++)
+		free(r->chans[j]);
+	free(r->cmap);
+	free(r);
+	free(array);
+	if(c){
+		free(c->chans[0]);
+		free(c);
+	}
+	return nil;
+}
-- 
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