Add index-8 sampler to the pipeline.

src/core/SkBitmapProcShader.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 "SkBitmapProcShader.h"
 #include "SkBitmapProcState.h"
 #include "SkBitmapProvider.h"
@@ skipping 158 matching lines @@
     SkXfermode::D32Proc     fXferProc;
 
     typedef BitmapProcInfoContext INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 static bool choose_linear_pipeline(const SkShader::ContextRec& rec, const SkImageInfo& srcInfo) {
     // These src attributes are not supported in the new 4f context (yet)
     //
-    if (srcInfo.bytesPerPixel() < 4 ||
-        kRGBA_F16_SkColorType == srcInfo.colorType() ||
-        kIndex_8_SkColorType == srcInfo.colorType()) {
+    if (srcInfo.colorType() != kRGBA_8888_SkColorType
+        && srcInfo.colorType() != kBGRA_8888_SkColorType
+        && srcInfo.colorType() != kIndex_8_SkColorType) {
         return false;
     }
 
 #if 0   // later we may opt-in to the new code even if the client hasn't requested it...
     // These src attributes are only supported in the new 4f context
     //
     if (srcInfo.isSRGB() ||
         kUnpremul_SkAlphaType == srcInfo.alphaType() ||
         (4 == srcInfo.bytesPerPixel() && kN32_SkColorType != srcInfo.colorType()))
     {
@@ skipping 31 matching lines @@
     //useLinearPipeline = false;
 
     if (useLinearPipeline) {
         void* infoStorage = (char*)storage + sizeof(LinearPipelineContext);
         SkBitmapProcInfo* info = new (infoStorage) SkBitmapProcInfo(provider, tmx, tmy);
         if (!info->init(totalInverse, *rec.fPaint)) {
             info->~SkBitmapProcInfo();
             return nullptr;
         }
         if (info->fPixmap.colorType() != kRGBA_8888_SkColorType
-            && info->fPixmap.colorType() != kBGRA_8888_SkColorType) {
+            && info->fPixmap.colorType() != kBGRA_8888_SkColorType
+            && info->fPixmap.colorType() != kIndex_8_SkColorType) {
             return nullptr;
         }
         return new (storage) LinearPipelineContext(shader, rec, info);
     } else {
         void* stateStorage = (char*)storage + sizeof(BitmapProcShaderContext);
         SkBitmapProcState* state = new (stateStorage) SkBitmapProcState(provider, tmx, tmy);
         if (!state->setup(totalInverse, *rec.fPaint)) {
             state->~SkBitmapProcState();
             return nullptr;
         }
@@ skipping 209 matching lines @@
         inner.reset(GrSimpleTextureEffect::Create(texture, matrix, params));
     }
 
     if (kAlpha_8_SkColorType == fRawBitmap.colorType()) {
         return GrFragmentProcessor::MulOutputByInputUnpremulColor(inner);
     }
     return GrFragmentProcessor::MulOutputByInputAlpha(inner);
 }
 
 #endif