colors

commit d2660bf89da280e85ebb114f2e85845486e9d1e9
parent 5a37247704d4cbfc185088dff8453e81fb6f7733
Author: sin <sin@2f30.org>
Date:   Sat,  6 Jun 2015 09:54:07 +0100

Skip pixels with a zero alpha component

Diffstat:
M
png.c
 | 
2
++

1 file changed, 2 insertions(+), 0 deletions(-)
diff --git a/png.c b/png.c
@@ -36,6 +36,8 @@ parseimg(char *f, void (*fn)(int, int, int))
 		png_byte *row = png_row_p[y];
 		for (x = 0; x < width; x++) {
 			png_byte *p = &row[x * 4];
+			if (color == PNG_COLOR_TYPE_RGB_ALPHA && !p[3])
+				continue;
 			fn(p[0], p[1], p[2]);
 		}
 	}