Add new GM to directly exercise perspective bitmap drawing

src/gpu/GrDrawContext.cpp

 
 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAtlasTextContext.h"
 #include "GrBatchTest.h"
@@ skipping 255 matching lines @@
             }
         }
     }
 
     GrColor color = paint.getColor();
     bool needAA = paint.isAntiAlias() &&
                   !pipelineBuilder.getRenderTarget()->isUnifiedMultisampled();
 
     // The fill path can handle rotation but not skew
     // The stroke path needs the rect to remain axis aligned (no rotation or skew)
-    // None of our draw rect calls can handle perspective yet
-    SkASSERT(!viewMatrix.hasPerspective());
+    // None of our AA draw rect calls can handle perspective yet
     bool canApplyAA = width >=0 ? viewMatrix.rectStaysRect() : viewMatrix.preservesRightAngles();
 
     if (needAA && canApplyAA) {
+        SkASSERT(!viewMatrix.hasPerspective());
         SkRect devBoundRect;
         viewMatrix.mapRect(&devBoundRect, rect);
         SkAutoTUnref<GrDrawBatch> batch;
         if (width >= 0) {
             batch.reset(GrRectBatchFactory::CreateAAStroke(color, viewMatrix, rect, devBoundRect,
                                                            *strokeInfo));
         } else {
             batch.reset(GrRectBatchFactory::CreateAAFill(color, viewMatrix, rect, devBoundRect));
         }
         fDrawTarget->drawBatch(pipelineBuilder, batch);
@@ skipping 470 matching lines @@
     RETURN_FALSE_IF_ABANDONED
 
     ASSERT_OWNED_RESOURCE(rt);
     SkASSERT(rt);
     return true;
 }
 
 void GrDrawContext::drawBatch(GrPipelineBuilder* pipelineBuilder, GrDrawBatch* batch) {
     fDrawTarget->drawBatch(*pipelineBuilder, batch);
 }