From: kramm <kramm>
Date: Wed, 26 Mar 2008 13:01:53 +0000 (+0000)
Subject: render multiply blended transparency groups with 50% transparency
X-Git-Tag: buttons-working~352
X-Git-Url: http://git.asbjorn.it/?a=commitdiff_plain;h=e302be3ec8aeedc8a13dea67e7e42ed08da31ee0;p=swftools.git

render multiply blended transparency groups with 50% transparency
---

diff --git a/lib/pdf/GFXOutputDev.cc b/lib/pdf/GFXOutputDev.cc
index 2537503..2ac6e47 100644
--- a/lib/pdf/GFXOutputDev.cc
+++ b/lib/pdf/GFXOutputDev.cc
@@ -2402,10 +2402,14 @@ void GFXOutputDev::paintTransparencyGroup(GfxState *state, double *bbox)
     }
 
     gfxresult_t*grouprecording = states[statepos].grouprecording;
-   
-    if(state->getBlendMode() == gfxBlendNormal) {
+  
+    int blendmode = state->getBlendMode();
+    if(blendmode == gfxBlendNormal || blendmode == gfxBlendMultiply) {
+	int alpha = state->getFillOpacity()*255;
+	if(blendmode == gfxBlendMultiply && alpha>200)
+	    alpha = 128;
 	gfxdevice_t ops;
-	gfxdevice_ops_init(&ops, this->device, (unsigned char)(state->getFillOpacity()*255));
+	gfxdevice_ops_init(&ops, this->device, alpha);
 	gfxresult_record_replay(grouprecording, &ops);
 	ops.finish(&ops);
     }