Image filters: refactor input GPU processing into filterInputGPU().

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"
@@ skipping 311 matching lines @@
 bool SkImageFilter::canFilterImageGPU() const {
     return this->asFragmentProcessor(nullptr, nullptr, SkMatrix::I(), SkIRect());
 }
 
 bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,
                                    SkBitmap* result, SkIPoint* offset) const {
 #if SK_SUPPORT_GPU
     SkBitmap input = src;
     SkASSERT(fInputCount == 1);
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
-    if (this->getInput(0) &&
-        !this->getInput(0)->getInputResultGPU(proxy, src, ctx, &input, &srcOffset)) {
+    if (!this->filterInputGPU(0, proxy, src, ctx, &input, &srcOffset)) {
         return false;
     }
     GrTexture* srcTexture = input.getTexture();
     SkIRect bounds;
     if (!this->applyCropRect(ctx, proxy, input, &srcOffset, &bounds, &input)) {
         return false;
     }
     SkRect srcRect = SkRect::Make(bounds);
     SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height());
     GrContext* context = srcTexture->getContext();
@@ skipping 115 matching lines @@
 }
 
 #if SK_SUPPORT_GPU
 
 void SkImageFilter::WrapTexture(GrTexture* texture, int width, int height, SkBitmap* result) {
     SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
     result->setInfo(info);
     result->setPixelRef(new SkGrPixelRef(info, texture))->unref();
 }
 
-bool SkImageFilter::getInputResultGPU(SkImageFilter::Proxy* proxy,
-                                      const SkBitmap& src, const Context& ctx,
-                                      SkBitmap* result, SkIPoint* offset) const {
+bool SkImageFilter::filterInputGPU(int index, SkImageFilter::Proxy* proxy,
+                                   const SkBitmap& src, const Context& ctx,
+                                   SkBitmap* result, SkIPoint* offset) const {
+    SkImageFilter* input = this->getInput(index);
+    if (!input) {
+        return true;
+    }
     // Ensure that GrContext calls under filterImage and filterImageGPU below will see an identity
     // matrix with no clip and that the matrix, clip, and render target set before this function was
     // called are restored before we return to the caller.
     GrContext* context = src.getTexture()->getContext();
 
-    if (this->canFilterImageGPU()) {
-        return this->filterImageGPU(proxy, src, ctx, result, offset);
+    if (input->canFilterImageGPU()) {
+        return input->filterImageGPU(proxy, src, ctx, result, offset);
     } else {
-        if (this->filterImage(proxy, src, ctx, result, offset)) {
+        if (input->filterImage(proxy, src, ctx, result, offset)) {
             if (!result->getTexture()) {
                 const SkImageInfo info = result->info();
                 if (kUnknown_SkColorType == info.colorType()) {
                     return false;
                 }
                 SkAutoTUnref<GrTexture> resultTex(
                     GrRefCachedBitmapTexture(context, *result,GrTextureParams::ClampNoFilter()));
                 result->setPixelRef(new SkGrPixelRef(info, resultTex))->unref();
             }
             return true;
@@ skipping 119 matching lines @@
     }
     return dev;
 }
 
 bool SkImageFilter::DeviceProxy::filterImage(const SkImageFilter* filter, const SkBitmap& src,
                                        const SkImageFilter::Context& ctx,
                                        SkBitmap* result, SkIPoint* offset) {
     return fDevice->filterImage(filter, src, ctx, result, offset);
 }