tgif: fix setting of transparency channels when writing gifs. - plan9port - [fork] Plan 9 from user space
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---
DIR commit 4e247f10fac36e3234aeb6490a66ac57d9520a4a
DIR parent 64ef09ff8983d108d67a68a66e9b608354c57e99
HTML Author: Rob Pike <robpike@gmail.com>
Date: Tue, 17 May 2011 17:46:45 -0400
gif: fix setting of transparency channels when writing gifs.
R=rsc
http://codereview.appspot.com/4538073
Diffstat:
M src/cmd/jpg/gif.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
---
DIR diff --git a/src/cmd/jpg/gif.c b/src/cmd/jpg/gif.c
t@@ -239,7 +239,7 @@ addalpha(Rawimage *i)
* r is used only for reference; the image is already in c.
*/
void
-whiteout(Rawimage *r, Rawimage *c)
+blackout(Rawimage *r, Rawimage *c)
{
int i, trindex;
uchar *rp, *cp;
t@@ -251,9 +251,9 @@ whiteout(Rawimage *r, Rawimage *c)
for(i=0; i<r->chanlen; i++){
if(*rp == trindex){
*cp++ = 0x00;
- *cp++ = 0xFF;
- *cp++ = 0xFF;
- *cp++ = 0xFF;
+ *cp++ = 0x00;
+ *cp++ = 0x00;
+ *cp++ = 0x00;
}else{
*cp++ = 0xFF;
cp += 3;
t@@ -264,7 +264,7 @@ whiteout(Rawimage *r, Rawimage *c)
for(i=0; i<r->chanlen; i++){
if(*rp == trindex){
*cp++ = 0x00;
- *cp++ = 0xFF;
+ *cp++ = 0x00;
}else{
*cp++ = 0xFF;
cp++;
t@@ -390,7 +390,7 @@ show(int fd, char *name)
if(nineflag){
if(images[0]->gifflags&TRANSP){
addalpha(rgbv[0]);
- whiteout(images[0], rgbv[0]);
+ blackout(images[0], rgbv[0]);
}
chantostr(buf, outchan);
print("%11s %11d %11d %11d %11d ", buf,
t@@ -402,7 +402,7 @@ show(int fd, char *name)
}else if(cflag){
if(images[0]->gifflags&TRANSP){
addalpha(rgbv[0]);
- whiteout(images[0], rgbv[0]);
+ blackout(images[0], rgbv[0]);
}
if(writerawimage(1, rgbv[0]) < 0){
fprint(2, "gif: %s: write error: %r\n", name);