Add alpha type to texture producer

src/gpu/GrImageIDTextureAdjuster.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 "GrImageIDTextureAdjuster.h"
 
 #include "GrContext.h"
@@ skipping 44 matching lines @@
 void GrBitmapTextureMaker::makeCopyKey(const CopyParams& copyParams, GrUniqueKey* copyKey) {
     if (fOriginalKey.isValid()) {
         MakeCopyKeyFromOrigKey(fOriginalKey, copyParams, copyKey);
     }
 }
 
 void GrBitmapTextureMaker::didCacheCopy(const GrUniqueKey& copyKey) {
     GrInstallBitmapUniqueKeyInvalidator(copyKey, fBitmap.pixelRef());
 }
 
+SkAlphaType GrBitmapTextureMaker::alphaType() const {
+    return fBitmap.alphaType();
+}
+
 SkColorSpace* GrBitmapTextureMaker::getColorSpace() {
     return fBitmap.colorSpace();
 }
 
 //////////////////////////////////////////////////////////////////////////////
 static bool cacher_is_alpha_only(const SkImageCacherator& cacher) {
     return kAlpha_8_SkColorType == cacher.info().colorType();
 }
 GrImageTextureMaker::GrImageTextureMaker(GrContext* context, SkImageCacherator* cacher,
                                          const SkImage* client, SkImage::CachingHint chint)
@@ skipping 19 matching lines @@
         MakeCopyKeyFromOrigKey(fOriginalKey, stretch, paramsCopyKey);
     }
 }
 
 void GrImageTextureMaker::didCacheCopy(const GrUniqueKey& copyKey) {
     if (fClient) {
         as_IB(fClient)->notifyAddedToCache();
     }
 }
 
+SkAlphaType GrImageTextureMaker::alphaType() const {
+    return fCacher->info().alphaType();
+}
+
 SkColorSpace* GrImageTextureMaker::getColorSpace() {
     return fCacher->info().colorSpace();
 }