diff --git a/poppler/SplashOutputDev.cc b/poppler/SplashOutputDev.cc
index 2ca42a4..13ca326 100644
--- a/poppler/SplashOutputDev.cc
+++ b/poppler/SplashOutputDev.cc
@@ -1195,6 +1195,7 @@ struct SplashTransparencyGroup {
   SplashBitmap *shape;
   GBool knockout;
   SplashCoord knockoutOpacity;
+  GBool fontAA;
 
   //----- saved state
   SplashBitmap *origBitmap;
@@ -3819,6 +3820,7 @@ void SplashOutputDev::beginTransparencyGroup(GfxState *state, double *bbox,
   // save state
   transpGroup->origBitmap = bitmap;
   transpGroup->origSplash = splash;
+  transpGroup->fontAA = fontEngine->getAA();
 
   //~ this handles the blendingColorSpace arg for soft masks, but
   //~   not yet for transparency groups
@@ -3848,8 +3850,11 @@ void SplashOutputDev::beginTransparencyGroup(GfxState *state, double *bbox,
   // create the temporary bitmap
   bitmap = new SplashBitmap(w, h, bitmapRowPad, colorMode, gTrue,
 			    bitmapTopDown, bitmap->getSeparationList());
-  splash = new Splash(bitmap, vectorAntialias,
+  splash = new Splash(bitmap, (transpGroup->next != NULL && transpGroup->next->knockout) ? gFalse : vectorAntialias,
 		      transpGroup->origSplash->getScreen());
+  if (transpGroup->next != NULL && transpGroup->next->knockout) {
+    fontEngine->setAA(gFalse);
+  }
   splash->setThinLineMode(transpGroup->origSplash->getThinLineMode());
   splash->setMinLineWidth(globalParams->getMinLineWidth());
   //~ Acrobat apparently copies at least the fill and stroke colors, and
@@ -3868,8 +3873,12 @@ void SplashOutputDev::beginTransparencyGroup(GfxState *state, double *bbox,
   } else {
     SplashBitmap *shape = (knockout) ? transpGroup->shape :
                                        (transpGroup->next != NULL && transpGroup->next->shape != NULL) ? transpGroup->next->shape : transpGroup->origBitmap;
+    int shapeTx = (knockout) ? tx :
+      (transpGroup->next != NULL && transpGroup->next->shape != NULL) ? transpGroup->next->tx + tx : tx;
+    int shapeTy = (knockout) ? ty :
+      (transpGroup->next != NULL && transpGroup->next->shape != NULL) ? transpGroup->next->ty + ty : ty;
     splash->blitTransparent(transpGroup->origBitmap, tx, ty, 0, 0, w, h);
-    splash->setInNonIsolatedGroup(shape, tx, ty);
+    splash->setInNonIsolatedGroup(shape, shapeTx, shapeTy);
   }
   transpGroup->tBitmap = bitmap;
   state->shiftCTMAndClip(-tx, -ty);
@@ -3906,8 +3915,9 @@ void SplashOutputDev::paintTransparencyGroup(GfxState *state, double *bbox) {
                                                                    : transpGroupStack->knockoutOpacity;
     splash->setOverprintMask(0xffffffff, gFalse);
     splash->composite(tBitmap, 0, 0, tx, ty,
-	      tBitmap->getWidth(), tBitmap->getHeight(),
-	      gFalse, !isolated, transpGroupStack->next != NULL && transpGroupStack->next->knockout, knockoutOpacity);
+      tBitmap->getWidth(), tBitmap->getHeight(),
+      gFalse, !isolated, transpGroupStack->next != NULL && transpGroupStack->next->knockout, knockoutOpacity);
+    fontEngine->setAA(transpGroupStack->fontAA);
     if (transpGroupStack->next != NULL && transpGroupStack->next->shape != NULL) {
       transpGroupStack->next->knockout = gTrue;
     }
diff --git a/splash/Splash.cc b/splash/Splash.cc
index 6bb0dfe..f9c4c37 100644
--- a/splash/Splash.cc
+++ b/splash/Splash.cc
@@ -446,39 +446,68 @@ void Splash::pipeRun(SplashPipe *pipe) {
 
     //----- read destination pixel
 
+    Guchar *destColorPtr;
+    if (pipe->shape && state->blendFunc && pipe->knockout && alpha0Bitmap != NULL) {
+      destColorPtr = alpha0Bitmap->data + (alpha0Y+pipe->y)*alpha0Bitmap->rowSize;
+      switch (bitmap->mode) {
+        case splashModeMono1:
+          destColorPtr += (alpha0X+pipe->x) / 8;
+          break;
+        case splashModeMono8:
+          destColorPtr += (alpha0X+pipe->x);
+          break;
+        case splashModeRGB8:
+        case splashModeBGR8:
+          destColorPtr += (alpha0X+pipe->x) * 3;
+          break;
+        case splashModeXBGR8:
+#if SPLASH_CMYK
+        case splashModeCMYK8:
+#endif
+          destColorPtr += (alpha0X+pipe->x) * 4;
+          break;
+#if SPLASH_CMYK
+        case splashModeDeviceN8:
+          destColorPtr += (alpha0X+pipe->x) * (SPOT_NCOMPS + 4);
+          break;
+#endif
+      }
+    } else {
+      destColorPtr = pipe->destColorPtr;
+    }
     switch (bitmap->mode) {
     case splashModeMono1:
-      cDest[0] = (*pipe->destColorPtr & pipe->destColorMask) ? 0xff : 0x00;
+      cDest[0] = (*destColorPtr & pipe->destColorMask) ? 0xff : 0x00;
       break;
     case splashModeMono8:
-      cDest[0] = *pipe->destColorPtr;
+      cDest[0] = *destColorPtr;
       break;
     case splashModeRGB8:
-      cDest[0] = pipe->destColorPtr[0];
-      cDest[1] = pipe->destColorPtr[1];
-      cDest[2] = pipe->destColorPtr[2];
+      cDest[0] = destColorPtr[0];
+      cDest[1] = destColorPtr[1];
+      cDest[2] = destColorPtr[2];
       break;
     case splashModeXBGR8:
-      cDest[0] = pipe->destColorPtr[2];
-      cDest[1] = pipe->destColorPtr[1];
-      cDest[2] = pipe->destColorPtr[0];
+      cDest[0] = destColorPtr[2];
+      cDest[1] = destColorPtr[1];
+      cDest[2] = destColorPtr[0];
       cDest[3] = 255;
       break;
     case splashModeBGR8:
-      cDest[0] = pipe->destColorPtr[2];
-      cDest[1] = pipe->destColorPtr[1];
-      cDest[2] = pipe->destColorPtr[0];
+      cDest[0] = destColorPtr[2];
+      cDest[1] = destColorPtr[1];
+      cDest[2] = destColorPtr[0];
       break;
 #if SPLASH_CMYK
     case splashModeCMYK8:
-      cDest[0] = pipe->destColorPtr[0];
-      cDest[1] = pipe->destColorPtr[1];
-      cDest[2] = pipe->destColorPtr[2];
-      cDest[3] = pipe->destColorPtr[3];
+      cDest[0] = destColorPtr[0];
+      cDest[1] = destColorPtr[1];
+      cDest[2] = destColorPtr[2];
+      cDest[3] = destColorPtr[3];
       break;
     case splashModeDeviceN8:
       for (cp = 0; cp < SPOT_NCOMPS + 4; cp++)
-        cDest[cp] = pipe->destColorPtr[cp];
+        cDest[cp] = destColorPtr[cp];
       break;
 #endif
     }
diff --git a/splash/SplashFTFontEngine.h b/splash/SplashFTFontEngine.h
index aa1ad5f..6206482 100644
--- a/splash/SplashFTFontEngine.h
+++ b/splash/SplashFTFontEngine.h
@@ -58,6 +58,8 @@ public:
                                       int *codeToGID, int codeToGIDLen);
   SplashFontFile *loadTrueTypeFont(SplashFontFileID *idA, SplashFontSrc *src,
 				   int *codeToGID, int codeToGIDLen, int faceIndex = 0);
+  GBool getAA() { return aa; }
+  void setAA(GBool aaA) { aa = aaA; }
 
 private:
 
diff --git a/splash/SplashFontEngine.cc b/splash/SplashFontEngine.cc
index 2e74f5a..0ac1cd0 100644
--- a/splash/SplashFontEngine.cc
+++ b/splash/SplashFontEngine.cc
@@ -288,6 +288,18 @@ SplashFontFile *SplashFontEngine::loadTrueTypeFont(SplashFontFileID *idA,
   return fontFile;
 }
 
+#if HAVE_FREETYPE_FREETYPE_H || HAVE_FREETYPE_H
+GBool SplashFontEngine::getAA() { 
+  return (ftEngine == NULL) ? gFalse : ftEngine->getAA(); 
+}
+
+void SplashFontEngine::setAA(GBool aa) { 
+  if (ftEngine != NULL) {
+    ftEngine->setAA(aa); 
+  }
+}
+#endif
+
 SplashFont *SplashFontEngine::getFont(SplashFontFile *fontFile,
 				      SplashCoord *textMat,
 				      SplashCoord *ctm) {
diff --git a/splash/SplashFontEngine.h b/splash/SplashFontEngine.h
index 54926b4..6c3a5c0 100644
--- a/splash/SplashFontEngine.h
+++ b/splash/SplashFontEngine.h
@@ -89,6 +89,10 @@ public:
   // Note that the Splash y axis points downward.
   SplashFont *getFont(SplashFontFile *fontFile,
 		      SplashCoord *textMat, SplashCoord *ctm);
+#if HAVE_FREETYPE_FREETYPE_H || HAVE_FREETYPE_H
+  GBool getAA();
+  void setAA(GBool aa);
+#endif
 
 private: