MFH: Fixed bug #28311 (Transparency detection code is off by 1).

Ilia Alshanetsky · Ilia Alshanetsky · commit 40329bff38a8 · 2004-05-28T13:47:26.000Z
diff --git a/ext/gd/libgd/gd_topal.c b/ext/gd/libgd/gd_topal.c
@@ -1260,7 +1260,7 @@ pass2_no_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output
 			 * will later be added at the end of the palette as the transparent
 			 * index.
 			 */
-			if ((im->transparent >= 0) && (im->transparent == *inptr)) {
+			if ((im->transparent >= 0) && (im->transparent == *(inptr - 1))) {
 				*outptr++ = im->colorsTotal;
 				continue;
 			}

Original file line number	Diff line number	Diff line change
`@@ -1260,7 +1260,7 @@ pass2_no_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output`
`1260`	`1260`	`* will later be added at the end of the palette as the transparent`
`1261`	`1261`	`* index.`
`1262`	`1262`	`*/`
`1263`		`- if ((im->transparent >= 0) && (im->transparent == *inptr)) {`
	`1263`	`+ if ((im->transparent >= 0) && (im->transparent == *(inptr - 1))) {`
`1264`	`1264`	`*outptr++ = im->colorsTotal;`
`1265`	`1265`	`continue;`
`1266`	`1266`	`}`