Split drawing functionality out of GrContext and into new GrDrawContext

src/core/SkImageFilter.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 "SkImageFilter.h"
 
 #include "SkBitmap.h"
 #include "SkChecksum.h"
 #include "SkDevice.h"
 #include "SkLazyPtr.h"
 #include "SkMatrixImageFilter.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkRect.h"
 #include "SkTDynamicHash.h"
 #include "SkTInternalLList.h"
 #include "SkValidationUtils.h"
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
+#include "GrDrawContext.h"
 #include "SkGrPixelRef.h"
 #include "SkGr.h"
 #endif
 
 #ifdef SK_BUILD_FOR_IOS
   enum { kDefaultCacheSize = 2 * 1024 * 1024 };
 #else 
   enum { kDefaultCacheSize = 128 * 1024 * 1024 };
 #endif 
 
@@ skipping 236 matching lines @@
     GrFragmentProcessor* fp;
     offset->fX = bounds.left();
     offset->fY = bounds.top();
     bounds.offset(-srcOffset);
     SkMatrix matrix(ctx.ctm());
     matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
     if (this->asFragmentProcessor(&fp, srcTexture, matrix, bounds)) {
         SkASSERT(fp);
         GrPaint paint;
         paint.addColorProcessor(fp)->unref();
-        context->drawNonAARectToRect(dst->asRenderTarget(), clip, paint, SkMatrix::I(), dstRect,
-                                     srcRect);
 
-        WrapTexture(dst, bounds.width(), bounds.height(), result);
-        return true;
+        GrDrawContext* drawContext = context->drawContext();
+        if (drawContext) {
+            drawContext->drawNonAARectToRect(dst->asRenderTarget(), clip, paint, SkMatrix::I(),
+                                             dstRect, srcRect);
+
+            WrapTexture(dst, bounds.width(), bounds.height(), result);
+            return true;
+        }
     }
 #endif
     return false;
 }
 
 bool SkImageFilter::applyCropRect(const Context& ctx, const SkBitmap& src,
                                   const SkIPoint& srcOffset, SkIRect* bounds) const {
     SkIRect srcBounds;
     src.getBounds(&srcBounds);
     srcBounds.offset(srcOffset);
@@ skipping 217 matching lines @@
 
 SK_DECLARE_STATIC_LAZY_PTR(SkImageFilter::Cache, cache, CreateCache);
 
 SkImageFilter::Cache* SkImageFilter::Cache::Get() {
     return cache.get();
 }
 
 void SkImageFilter::PurgeCache() {
     cache.get()->purge();
 }