Add NV12 texture conversion support.

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 103 matching lines @@
     }
 
     sk_sp<GrDrawContext> drawContext(ctx->newDrawContext(SkBackingFit::kExact,
                                                          desc.fWidth, desc.fHeight,
                                                          desc.fConfig, desc.fSampleCnt));
     if (!drawContext) {
         return nullptr;
     }
 
     GrPaint paint;
-    sk_sp<GrFragmentProcessor> yuvToRgbProcessor(GrYUVEffect::MakeYUVToRGB(yuvTextures[0],
-                                                                           yuvTextures[1],
-                                                                           yuvTextures[2],
-                                                                           yuvInfo.fSizeInfo.fSizes,
-                                                                           yuvInfo.fColorSpace));
+    sk_sp<GrFragmentProcessor> yuvToRgbProcessor(
+        GrYUVEffect::MakeYUVToRGB(yuvTextures[0], yuvTextures[1], yuvTextures[2],
+                                  yuvInfo.fSizeInfo.fSizes, yuvInfo.fColorSpace, false));
     paint.addColorFragmentProcessor(std::move(yuvToRgbProcessor));
 
     // If we're decoding an sRGB image, the result of our linear math on the YUV planes is already
     // in sRGB. (The encoding is just math on bytes, with no concept of color spaces.) So, we need
     // to output the results of that math directly to the buffer that we will then consider sRGB.
     // If we have sRGB write control, we can just tell the HW not to do the Linear -> sRGB step.
     // Otherwise, we do our shader math to go from YUV -> sRGB, manually convert sRGB -> Linear,
     // then let the HW convert Linear -> sRGB.
     if (GrPixelConfigIsSRGB(desc.fConfig)) {
         if (ctx->caps()->srgbWriteControl()) {
             paint.setDisableOutputConversionToSRGB(true);
         } else {
             paint.addColorFragmentProcessor(GrGammaEffect::Make(2.2f));
         }
     }
 
     paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
     const SkRect r = SkRect::MakeIWH(yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth,
             yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);
 
     drawContext->drawRect(GrNoClip(), paint, SkMatrix::I(), r);
 
     return drawContext->asTexture();
 }