ref: 1b81de20e70954295685a40d7cde24a62dac9cac
dir: /page-invert/
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))