Refugee from Dead Machine 4: MDB Monster

src/effects/SkMorphologyImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkMorphologyImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 649 matching lines @@
                                SkIntToScalar(srcTexture->height())));
 
     SkIRect dstRect = SkIRect::MakeWH(rect.width(), rect.height());
     GrSurfaceDesc desc;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = rect.width();
     desc.fHeight = rect.height();
     desc.fConfig = kSkia8888_GrPixelConfig;
     SkIRect srcRect = rect;
 
-    GrDrawContext* drawContext = context->drawContext();
-    if (!drawContext) {
-        return false;
-    }
+    GrDrawContext* srcDrawContext = NULL;
 
     if (radius.fWidth > 0) {
-        GrTexture* texture = context->textureProvider()->refScratchTexture(
+        GrTexture* dst = context->textureProvider()->refScratchTexture(
             desc, GrTextureProvider::kApprox_ScratchTexMatch);
-        if (NULL == texture) {
+        if (NULL == dst) {
             return false;
         }
-        apply_morphology_pass(drawContext, texture->asRenderTarget(), clip, srcTexture,
+        GrDrawContext* dstDrawContext = context->drawContext(dst->asRenderTarget());
+        if (!dstDrawContext) {
+            return false;
+        }
+        dstDrawContext->uses(srcTexture);
+
+        apply_morphology_pass(dstDrawContext, dst->asRenderTarget(), clip, srcTexture,
                               srcRect, dstRect, radius.fWidth, morphType,
                               Gr1DKernelEffect::kX_Direction);
         SkIRect clearRect = SkIRect::MakeXYWH(dstRect.fLeft, dstRect.fBottom,
                                               dstRect.width(), radius.fHeight);
         GrColor clearColor = GrMorphologyEffect::kErode_MorphologyType == morphType ?
                                 SK_ColorWHITE :
                                 SK_ColorTRANSPARENT;
-        drawContext->clear(texture->asRenderTarget(), &clearRect, clearColor, false);
-        srcTexture.reset(texture);
+        dstDrawContext->clear(dst->asRenderTarget(), &clearRect, clearColor, false);
+
+        srcDrawContext = dstDrawContext;
+        srcTexture.reset(dst);
         srcRect = dstRect;
     }
     if (radius.fHeight > 0) {
-        GrTexture* texture = context->textureProvider()->refScratchTexture(desc,
+        GrTexture* dst = context->textureProvider()->refScratchTexture(desc,
             GrTextureProvider::kApprox_ScratchTexMatch);
-        if (NULL == texture) {
+        if (NULL == dst) {
             return false;
         }
-        apply_morphology_pass(drawContext, texture->asRenderTarget(), clip, srcTexture,
+        GrDrawContext* dstDrawContext = context->drawContext(dst->asRenderTarget());
+        if (!dstDrawContext) {
+            return false;
+        }
+        if (srcDrawContext) {
+            dstDrawContext->uses(srcDrawContext);
+        } else {
+            dstDrawContext->uses(srcTexture);
+        }
+
+        apply_morphology_pass(dstDrawContext, dst->asRenderTarget(), clip, srcTexture,
                               srcRect, dstRect, radius.fHeight, morphType,
                               Gr1DKernelEffect::kY_Direction);
-        srcTexture.reset(texture);
+
+        srcDrawContext = dstDrawContext;
+        srcTexture.reset(dst);
     }
     SkImageFilter::WrapTexture(srcTexture, rect.width(), rect.height(), dst);
     return true;
 }
 
 };
 
 bool SkMorphologyImageFilter::filterImageGPUGeneric(bool dilate,
                                                     Proxy* proxy,
                                                     const SkBitmap& src,
                                                     const Context& ctx,
                                                     SkBitmap* result,
                                                     SkIPoint* offset) const {
     SkBitmap input = src;
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
-    if (getInput(0) && !getInput(0)->getInputResultGPU(proxy, src, ctx, &input, &srcOffset)) {
+    if (this->getInput(0) && 
+        !this->getInput(0)->getInputResultGPU(proxy, src, ctx, &input, &srcOffset)) {
         return false;
     }
     SkIRect bounds;
     if (!this->applyCropRect(ctx, proxy, input, &srcOffset, &bounds, &input)) {
         return false;
     }
     SkVector radius = SkVector::Make(SkIntToScalar(this->radius().width()),
                                      SkIntToScalar(this->radius().height()));
     ctx.ctm().mapVectors(&radius, 1);
     int width = SkScalarFloorToInt(radius.fX);
     int height = SkScalarFloorToInt(radius.fY);
 
     if (width < 0 || height < 0) {
         return false;
     }
 
     SkIRect srcBounds = bounds;
     srcBounds.offset(-srcOffset);
     if (width == 0 && height == 0) {
         input.extractSubset(result, srcBounds);
         offset->fX = bounds.left();
         offset->fY = bounds.top();
         return true;
     }
 
-    GrMorphologyEffect::MorphologyType type = dilate ? GrMorphologyEffect::kDilate_MorphologyType : GrMorphologyEffect::kErode_MorphologyType;
-    if (!apply_morphology(input, srcBounds, type,
-                          SkISize::Make(width, height), result)) {
+    GrMorphologyEffect::MorphologyType type = dilate ? GrMorphologyEffect::kDilate_MorphologyType
+                                                     : GrMorphologyEffect::kErode_MorphologyType;
+    if (!apply_morphology(input, srcBounds, type, SkISize::Make(width, height), result)) {
         return false;
     }
     offset->fX = bounds.left();
     offset->fY = bounds.top();
     return true;
 }
 
 bool SkDilateImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                          SkBitmap* result, SkIPoint* offset) const {
     return this->filterImageGPUGeneric(true, proxy, src, ctx, result, offset);
 }
 
 bool SkErodeImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                         SkBitmap* result, SkIPoint* offset) const {
     return this->filterImageGPUGeneric(false, proxy, src, ctx, result, offset);
 }
 
 #endif