the flash player expects us to set *all* components to 0 if a color

is fully transparent

diff --git a/src/png2swf.c b/src/png2swf.c
index 9980e5a..0d7e1a6 100644 (file)
--- a/src/png2swf.c
+++ b/src/png2swf.c
@@ -76,7 +76,7 @@ TAG *MovieStart(SWF * swf, float framerate, int dx, int dy)
     t = swf->firstTag = swf_InsertTag(NULL, ST_SETBACKGROUNDCOLOR);
 
     rgb.r = rgb.g = rgb.b = rgb.a = 0x00;
-    rgb.g = 0xff; //<--- handy for testing alpha conversion
+    //rgb.g = 0xff; //<--- handy for testing alpha conversion
     swf_SetRGB(t, &rgb);
 
     return t;
@@ -667,8 +667,12 @@ TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
                if(hasalphacolor) {
                    if(rgba[i].r == alphacolor[0] &&
                       rgba[i].g == alphacolor[1] &&
-                      rgba[i].b == alphacolor[2])
+                      rgba[i].b == alphacolor[2]) {
+                       rgba[i].r = 0;
+                       rgba[i].g = 0;
+                       rgba[i].b = 0;
                        rgba[i].a = 0;
+                   }
                }
            }
        } else {
@@ -681,8 +685,12 @@ TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
                rgba[i].b = i*mult;
                rgba[i].a = 255;
                if(hasalphacolor) {
-                   if(rgba[i].r == alphacolor[0])
+                   if(rgba[i].r == alphacolor[0]) {
+                       rgba[i].r = 0;
+                       rgba[i].g = 0;
+                       rgba[i].b = 0;
                        rgba[i].a = 0;
+                   }
                }
            }
        }