Refugee from Dead Machine 4: MDB Monster

src/gpu/effects/GrConfigConversionEffect.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrConfigConversionEffect.h"
 #include "GrContext.h"
 #include "GrDrawContext.h"
@@ skipping 190 matching lines @@
         return;
     }
 
     static const PMConversion kConversionRules[][2] = {
         {kDivByAlpha_RoundDown_PMConversion, kMulByAlpha_RoundUp_PMConversion},
         {kDivByAlpha_RoundUp_PMConversion, kMulByAlpha_RoundDown_PMConversion},
     };
 
     bool failed = true;
 
-    GrDrawContext* drawContext = context->drawContext();
-    if (!drawContext) {
-        return;
-    }
-
     for (size_t i = 0; i < SK_ARRAY_COUNT(kConversionRules) && failed; ++i) {
         *pmToUPMRule = kConversionRules[i][0];
         *upmToPMRule = kConversionRules[i][1];
 
         static const SkRect kDstRect = SkRect::MakeWH(SkIntToScalar(256), SkIntToScalar(256));
         static const SkRect kSrcRect = SkRect::MakeWH(SK_Scalar1, SK_Scalar1);
         // We do a PM->UPM draw from dataTex to readTex and read the data. Then we do a UPM->PM draw
         // from readTex to tempTex followed by a PM->UPM draw to readTex and finally read the data.
         // We then verify that two reads produced the same values.
 
         SkAutoTUnref<GrFragmentProcessor> pmToUPM1(
                 SkNEW_ARGS(GrConfigConversionEffect,
                            (dataTex, false, *pmToUPMRule, SkMatrix::I())));
         SkAutoTUnref<GrFragmentProcessor> upmToPM(
                 SkNEW_ARGS(GrConfigConversionEffect,
                            (readTex, false, *upmToPMRule, SkMatrix::I())));
         SkAutoTUnref<GrFragmentProcessor> pmToUPM2(
                 SkNEW_ARGS(GrConfigConversionEffect,
                            (tempTex, false, *pmToUPMRule, SkMatrix::I())));
 
         GrPaint paint1;
         paint1.addColorProcessor(pmToUPM1);
-        drawContext->drawNonAARectToRect(readTex->asRenderTarget(),
-                                         GrClip::WideOpen(),
-                                         paint1,
-                                         SkMatrix::I(),
-                                         kDstRect,
-                                         kSrcRect);
+
+
+        GrDrawContext* readDrawContext = context->drawContext(readTex->asRenderTarget());
+        if (!readDrawContext) {
+            failed = true;
+            break;
+        }
+        readDrawContext->uses(dataTex);
+
+        readDrawContext->drawNonAARectToRect(readTex->asRenderTarget(),
+                                             GrClip::WideOpen(),
+                                             paint1,
+                                             SkMatrix::I(),
+                                             kDstRect,
+                                             kSrcRect);
 
         readTex->readPixels(0, 0, 256, 256, kRGBA_8888_GrPixelConfig, firstRead);
 
         GrPaint paint2;
         paint2.addColorProcessor(upmToPM);
-        drawContext->drawNonAARectToRect(tempTex->asRenderTarget(),
-                                         GrClip::WideOpen(),
-                                         paint2,
-                                         SkMatrix::I(),
-                                         kDstRect,
-                                         kSrcRect);
+
+        GrDrawContext* tempDrawContext = context->drawContext(tempTex->asRenderTarget());
+        if (!tempDrawContext) {
+            failed = true;
+            break;
+        }
+        tempDrawContext->uses(readDrawContext);
+
+        tempDrawContext->drawNonAARectToRect(tempTex->asRenderTarget(),
+                                             GrClip::WideOpen(),
+                                             paint2,
+                                             SkMatrix::I(),
+                                             kDstRect,
+                                             kSrcRect);
 
         GrPaint paint3;
         paint3.addColorProcessor(pmToUPM2);
-        drawContext->drawNonAARectToRect(readTex->asRenderTarget(),
-                                         GrClip::WideOpen(),
-                                         paint3,
-                                         SkMatrix::I(),
-                                         kDstRect,
-                                         kSrcRect);
+
+        readDrawContext = context->drawContext(readTex->asRenderTarget());
+        if (!readDrawContext) {
+            failed = true;
+            break;
+        }
+        readDrawContext->uses(tempDrawContext);
+
+        readDrawContext->drawNonAARectToRect(readTex->asRenderTarget(),
+                                             GrClip::WideOpen(),
+                                             paint3,
+                                             SkMatrix::I(),
+                                             kDstRect,
+                                             kSrcRect);
 
         readTex->readPixels(0, 0, 256, 256, kRGBA_8888_GrPixelConfig, secondRead);
 
         failed = false;
         for (int y = 0; y < 256 && !failed; ++y) {
             for (int x = 0; x <= y; ++x) {
                 if (firstRead[256 * y + x] != secondRead[256 * y + x]) {
                     failed = true;
                     break;
                 }
@@ skipping 21 matching lines @@
             kNone_PMConversion != pmConversion) {
             // The PM conversions assume colors are 0..255
             return NULL;
         }
         return SkNEW_ARGS(GrConfigConversionEffect, (texture,
                                                      swapRedAndBlue,
                                                      pmConversion,
                                                      matrix));
     }
 }