Switch SkBlurImageFilter over to new onFilterImage interface

src/gpu/SkGpuDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "GrBlurUtils.h"
@@ skipping 202 matching lines @@
     desc.fTextureStorageAllocator = textureStorageAllocator;
     desc.fIsMipMapped = false;
     GrTexture* texture = context->textureProvider()->createTexture(desc, budgeted, nullptr, 0);
     if (nullptr == texture) {
         return nullptr;
     }
     SkASSERT(nullptr != texture->asRenderTarget());
     return texture->asRenderTarget();
 }
 
+// This method ensures that we always have a texture-backed "bitmap" when we finally
+// call through to the base impl so that the image filtering code will take the
+// gpu-specific paths. This mirrors SkCanvas::internalDrawDevice (the other
+// use of SkImageFilter::filterImage) in that the source and dest will have
+// homogenous backing (e.g., raster or gpu).
+void SkGpuDevice::drawBitmapAsSprite(const SkDraw& draw, const SkBitmap& bitmap,
+                                     int x, int y, const SkPaint& paint) {
+    if (bitmap.getTexture()) {
+        INHERITED::drawBitmapAsSprite(draw, bitmap, x, y, paint);
+        return;
+    }
+
+    SkAutoLockPixels alp(bitmap, !bitmap.getTexture());
+    if (!bitmap.getTexture() && !bitmap.readyToDraw()) {
+        return;
+    }
+
+    GrTexture* texture;
+    // draw sprite neither filters nor tiles.
+    AutoBitmapTexture abt(fContext, bitmap, GrTextureParams::ClampNoFilter(), &texture);
+    if (!texture) {
+        return;
+    }
+
+    SkBitmap newBitmap;
+
+    GrWrapTextureInBitmap(texture, texture->width(), texture->height(),
+                          bitmap.isOpaque(), &newBitmap);
+
+    INHERITED::drawBitmapAsSprite(draw, newBitmap, x, y, paint);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkGpuDevice::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
                                int x, int y) {
     ASSERT_SINGLE_OWNER
 
     // TODO: teach fRenderTarget to take ImageInfo directly to specify the src pixels
     GrPixelConfig config = SkImageInfo2GrPixelConfig(dstInfo);
     if (kUnknown_GrPixelConfig == config) {
         return false;
@@ skipping 1649 matching lines @@
 }
 
 SkImageFilter::Cache* SkGpuDevice::getImageFilterCache() {
     ASSERT_SINGLE_OWNER
     // We always return a transient cache, so it is freed after each
     // filter traversal.
     return SkGpuDevice::NewImageFilterCache();
 }
 
 #endif