Minor GrRenderTarget retraction

src/gpu/GrYUVProvider.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 "GrContext.h"
 #include "GrDrawContext.h"
 #include "GrYUVProvider.h"
@@ skipping 62 matching lines @@
         }
 
         if (useCache) {
             // Decoding is done, cache the resulting YUV planes
             SkYUVPlanesCache::Add(provider->onGetID(), fCachedData, yuvInfo);
         }
     }
     return true;
 }
 
-GrTexture* GrYUVProvider::refAsTexture(GrContext* ctx, const GrSurfaceDesc& desc, bool useCache) {
+sk_sp<GrTexture> GrYUVProvider::refAsTexture(GrContext* ctx,
+                                             const GrSurfaceDesc& desc,
+                                             bool useCache) {
     SkYUVPlanesCache::Info yuvInfo;
     void* planes[3];
     YUVScoper scoper;
     if (!scoper.init(this, &yuvInfo, planes, useCache)) {
         return nullptr;
     }
 
     GrSurfaceDesc yuvDesc;
     yuvDesc.fConfig = kAlpha_8_GrPixelConfig;
     SkAutoTUnref<GrTexture> yuvTextures[3];
     for (int i = 0; i < 3; i++) {
         yuvDesc.fWidth  = yuvInfo.fSizeInfo.fSizes[i].fWidth;
         yuvDesc.fHeight = yuvInfo.fSizeInfo.fSizes[i].fHeight;
         // TODO: why do we need this check?
         bool needsExactTexture =
                 (yuvDesc.fWidth  != yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth) ||
                 (yuvDesc.fHeight != yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);
         if (needsExactTexture) {
             yuvTextures[i].reset(ctx->textureProvider()->createTexture(yuvDesc, SkBudgeted::kYes));
         } else {
             yuvTextures[i].reset(ctx->textureProvider()->createApproxTexture(yuvDesc));
         }
         if (!yuvTextures[i] ||
             !yuvTextures[i]->writePixels(0, 0, yuvDesc.fWidth, yuvDesc.fHeight, yuvDesc.fConfig,
                                          planes[i], yuvInfo.fSizeInfo.fWidthBytes[i])) {
                 return nullptr;
             }
     }
 
-    GrSurfaceDesc rtDesc = desc;
-    rtDesc.fFlags = rtDesc.fFlags | kRenderTarget_GrSurfaceFlag;
-
-    SkAutoTUnref<GrTexture> result(ctx->textureProvider()->createTexture(rtDesc, SkBudgeted::kYes,
-                                                                         nullptr, 0));
-    if (!result) {
+    sk_sp<GrDrawContext> drawContext(ctx->newDrawContext(SkBackingFit::kExact,
+                                                         desc.fWidth, desc.fHeight,
+                                                         desc.fConfig, desc.fSampleCnt));
+    if (!drawContext) {
         return nullptr;
     }
 
-    GrRenderTarget* renderTarget = result->asRenderTarget();
-    SkASSERT(renderTarget);
-
     GrPaint paint;
     // We may be decoding an sRGB image, but the result of our linear math on the YUV planes
     // is already in sRGB in that case. Don't convert (which will make the image too bright).
     paint.setDisableOutputConversionToSRGB(true);
     SkAutoTUnref<const GrFragmentProcessor> yuvToRgbProcessor(
                                         GrYUVEffect::CreateYUVToRGB(yuvTextures[0],
                                                                     yuvTextures[1],
                                                                     yuvTextures[2],
                                                                     yuvInfo.fSizeInfo.fSizes,
                                                                     yuvInfo.fColorSpace));
     paint.addColorFragmentProcessor(yuvToRgbProcessor);
     paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
     const SkRect r = SkRect::MakeIWH(yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth,
             yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);
 
-    sk_sp<GrDrawContext> drawContext(ctx->drawContext(sk_ref_sp(renderTarget)));
-    if (!drawContext) {
-        return nullptr;
-    }
-
     drawContext->drawRect(GrClip::WideOpen(), paint, SkMatrix::I(), r);
 
-    return result.release();
+    return drawContext->asTexture();
 }