fixed staircase issue with poly2bitmap

[swftools.git] / lib / pdf / BitmapOutputDev.cc

diff --git a/lib/pdf/BitmapOutputDev.cc b/lib/pdf/BitmapOutputDev.cc
index 6eaea6b..25c4c81 100644 (file)
--- a/lib/pdf/BitmapOutputDev.cc
+++ b/lib/pdf/BitmapOutputDev.cc
@@ -226,10 +226,10 @@ void BitmapOutputDev::flushBitmap()
                }
            } else {
                for(x=0;x<rangex;x++) {
-                   if(!(ain2[(x+xmin)/8]&(0x80>>(x&7)))) {
+                   if(!(ain2[(x+xmin)/8]&(0x80>>((x+xmin)&7)))) {
                        /* cut away pixels that we don't remember drawing (i.e., that are
-                          not in the monochrome bitmap. Prevents some "hairlines" showing
-                          up to the left and right of bitmaps */
+                          not in the monochrome bitmap). Prevents some "hairlines" showing
+                          up to the left and right of bitmaps. */
                        out[x].r = 0;out[x].g = 0;out[x].b = 0;out[x].a = 0;
                    } else {
                        /* according to endPage()/compositeBackground() in xpdf/SplashOutputDev.cc, we