X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=lib%2Fpdf%2FFullBitmapOutputDev.cc;h=c65be8df3481496dea95c26ae7fb8a1156770796;hb=876cadced9adaae335e18d8d0bb5288eec53570a;hp=d35956db8ef1916e7e738c3d62c5ca57b7e87fa3;hpb=eed4136dd1e5d7036630bd9ef29faa7e11a8f0ef;p=swftools.git

diff --git a/lib/pdf/FullBitmapOutputDev.cc b/lib/pdf/FullBitmapOutputDev.cc
index d35956d..c65be8d 100644
--- a/lib/pdf/FullBitmapOutputDev.cc
+++ b/lib/pdf/FullBitmapOutputDev.cc
@@ -167,13 +167,11 @@ void FullBitmapOutputDev::flushBitmap()
 	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];
+	    // blend against a white background
+	    out[x].r = (in[x*3+0]*ain[x])/255 + 255-ain[x];
+	    out[x].g = (in[x*3+1]*ain[x])/255 + 255-ain[x];
+	    out[x].b = (in[x*3+2]*ain[x])/255 + 255-ain[x];
+	    out[x].a = 255;//ain[x];
 	}
     }
     /* transform bitmap rectangle to "device space" */
@@ -192,9 +190,6 @@ void FullBitmapOutputDev::flushBitmap()
     dev->fillbitmap(dev, line, img, &m, 0);
     gfxline_free(line);
 
-    memset(rgbdev->getBitmap()->getAlphaPtr(), 0, rgbdev->getBitmap()->getWidth()*rgbdev->getBitmap()->getHeight());
-    memset(rgbdev->getBitmap()->getDataPtr(), 0, rgbdev->getBitmap()->getRowSize()*rgbdev->getBitmap()->getHeight());
-
     free(img->data);img->data=0;free(img);img=0;
 }
 
@@ -594,3 +589,6 @@ void FullBitmapOutputDev::clearSoftMask(GfxState *state)
     msg("<debug> clearSoftMask");
     rgbdev->clearSoftMask(state);
 }
+
+
+