X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fpdf%2FBitmapOutputDev.cc;h=0b49c2c8a765c93c411d3c5d996e7e939607948f;hb=0784a8a882e7b98299fb6a90f0f9a7ebb322562b;hp=b9b21248623b75d4654cb878c210132216053594;hpb=e88592f5e4f37936ac708914b641be05eb8f265f;p=swftools.git

diff --git a/lib/pdf/BitmapOutputDev.cc b/lib/pdf/BitmapOutputDev.cc
index b9b2124..0b49c2c 100644
--- a/lib/pdf/BitmapOutputDev.cc
+++ b/lib/pdf/BitmapOutputDev.cc
@@ -79,6 +79,10 @@ BitmapOutputDev::~BitmapOutputDev()
 
 }
 
+GBool BitmapOutputDev::getVectorAntialias()
+{
+    return this->rgbdev->getVectorAntialias();
+}
 void BitmapOutputDev::setVectorAntialias(GBool vaa)
 {
     this->rgbdev->setVectorAntialias(vaa);
@@ -190,11 +194,13 @@ void BitmapOutputDev::flush()
 	gfxcolor_t*out = &img->data[y*rangex];
 	Guchar*ain = &alpha[(y+ymin)*width+xmin];
 	for(x=0;x<rangex;x++) {
+	    /* according to endPage()/compositeBackground() in xpdf/SplashOutputDev.cc, we
+	       have to premultiply alpha (mix background and pixel according to the alpha channel).
+	    */
 	    out[x].r = (in[x*3+0]*ain[x])/255;
 	    out[x].g = (in[x*3+1]*ain[x])/255;
 	    out[x].b = (in[x*3+2]*ain[x])/255;
 	    out[x].a = ain[x];
-	    //out[x].a = ain[x]?255:0;
 	}
     }
     /* transform bitmap rectangle to "device space" */