Refugee from Dead Machine 4: MDB Monster

src/effects/SkDisplacementMapEffect.cpp

Index: src/effects/SkDisplacementMapEffect.cpp
diff --git a/src/effects/SkDisplacementMapEffect.cpp b/src/effects/SkDisplacementMapEffect.cpp
index d7d92c82b9476487ed009011cb02e8f973064e79..794da2aea601bd7289f7d951f8e4e4fe2ab8e268 100644
--- a/src/effects/SkDisplacementMapEffect.cpp
+++ b/src/effects/SkDisplacementMapEffect.cpp
@@ -395,15 +395,15 @@ bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src,
                                              SkBitmap* result, SkIPoint* offset) const {
     SkBitmap colorBM = src;
     SkIPoint colorOffset = SkIPoint::Make(0, 0);
-    if (getColorInput() && !getColorInput()->getInputResultGPU(proxy, src, ctx, &colorBM,
-                                                               &colorOffset)) {
+    if (this->getColorInput() && 
+        !this->getColorInput()->getInputResultGPU(proxy, src, ctx, &colorBM, &colorOffset)) {
         return false;
     }
     SkBitmap displacementBM = src;
     SkIPoint displacementOffset = SkIPoint::Make(0, 0);
-    if (getDisplacementInput() &&
-        !getDisplacementInput()->getInputResultGPU(proxy, src, ctx, &displacementBM,
-                                                   &displacementOffset)) {
+    if (this->getDisplacementInput() &&
+        !this->getDisplacementInput()->getInputResultGPU(proxy, src, ctx, &displacementBM,
+                                                         &displacementOffset)) {
         return false;
     }
     SkIRect bounds;
@@ -459,10 +459,12 @@ bool SkDisplacementMapEffect::filterImageGPU(Proxy* proxy, const SkBitmap& src,
     matrix.setTranslate(-SkIntToScalar(colorBounds.x()),
                         -SkIntToScalar(colorBounds.y()));
 
-    GrDrawContext* drawContext = context->drawContext();
+    GrDrawContext* drawContext = context->drawContext(dst->asRenderTarget());
     if (!drawContext) {
         return false;
     }
+    drawContext->uses(displacement);
+    drawContext->uses(color);
 
     drawContext->drawRect(dst->asRenderTarget(), GrClip::WideOpen(), paint, matrix,
                           SkRect::Make(colorBounds));