shithub: patch

ref: 65d33850cd0a8bda177e753966b86cb8df36b82b
dir: /page-invert/

View raw version
this shit sucks. that code doesn't belong there. something in pipeline would be
better. pico?

diff -r 3cb0cf9ab43a sys/src/cmd/page.c
--- a/sys/src/cmd/page.c	Mon Feb 08 20:07:56 2016 -0500
+++ b/sys/src/cmd/page.c	Thu Feb 11 16:16:28 2016 +0100
@@ -33,6 +33,7 @@
 int imode;
 int newwin;
 int rotate;
+int invert;
 int viewgen;
 int forward;	/* read ahead direction: >= 0 forwards, < 0 backwards */
 Point resize, pos;
@@ -67,6 +68,7 @@
 	Cfitheight,
 	Crotate90,
 	Cupsidedown,
+	Cinv,
 	Cdummy1,
 	Cnext,
 	Cprev,
@@ -91,6 +93,7 @@
 	[Cfitheight]	"fit height",	'h', 0, 0,
 	[Crotate90]	"rotate 90",	'r', 0, 0,
 	[Cupsidedown]	"upside down",	'u', 0, 0,
+	[Cinv]		"invert",	'i', 0, 0,
 	[Cdummy1]	"",		0, 0, 0,
 	[Cnext]		"next",		Kright, ' ', '\n', 
 	[Cprev]		"prev",		Kleft, Kbs, 0,
@@ -894,6 +897,23 @@
 }
 
 void
+inv(Image *i)
+{
+	int n;
+	uchar *buf, *p;
+
+	n = imagesize(i);
+	buf = malloc(n);
+	if(buf == 0)
+		return;
+	unloadimage(i, i->r, buf, n);
+	for(p=buf; p<buf+n; p++)
+		*p = ~*p;
+	loadimage(i, i->r, buf, n);
+	free(buf);
+}
+
+void
 loadpage(Page *p)
 {
 	int fd;
@@ -912,6 +932,8 @@
 		if(p->image == nil)
 			p->open = nil;
 		else {
+			if(invert)
+				inv(p->image);
 			lockdisplay(display);
 			imemsize += imagesize(p->image);
 			unlockdisplay(display);
@@ -1494,6 +1516,9 @@
 		resize = subpt(screen->r.max, screen->r.min);
 		resize.x = 0;
 		goto Unload;
+	case Cinv:
+		invert = !invert;
+		goto Unload;
 	case Czoomin:
 	case Czoomout:
 		if(current == nil || !canqlock(current))