skia: Add support for CHROMIUM_image backed textures.

src/gpu/SkGpuDevice.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 "SkGpuDevice.h"
 
 #include "GrBlurUtils.h"
@@ skipping 138 matching lines @@
     }
     unsigned flags;
     if (!CheckAlphaTypeAndGetFlags(nullptr, init, &flags)) {
         return nullptr;
     }
     return new SkGpuDevice(rt, width, height, props, flags);
 }
 
 SkGpuDevice* SkGpuDevice::Create(GrContext* context, SkSurface::Budgeted budgeted,
                                  const SkImageInfo& info, int sampleCount,
-                                 const SkSurfaceProps* props, InitContents init) {
+                                 const SkSurfaceProps* props, InitContents init,
+                                 GrTextureStorageAllocator* customAllocator) {
     unsigned flags;
     if (!CheckAlphaTypeAndGetFlags(&info, init, &flags)) {
         return nullptr;
     }
 
-    SkAutoTUnref<GrRenderTarget> rt(CreateRenderTarget(context, budgeted, info,  sampleCount));
+    SkAutoTUnref<GrRenderTarget> rt(CreateRenderTarget(
+            context, budgeted, info, sampleCount, customAllocator));
     if (nullptr == rt) {
         return nullptr;
     }
 
     return new SkGpuDevice(rt, info.width(), info.height(), props, flags);
 }
 
 SkGpuDevice::SkGpuDevice(GrRenderTarget* rt, int width, int height,
                          const SkSurfaceProps* props, unsigned flags)
     : INHERITED(SkSurfacePropsCopyOrDefault(props))
     , fContext(SkRef(rt->getContext()))
     , fRenderTarget(SkRef(rt)) {
     fNeedClear = SkToBool(flags & kNeedClear_Flag);
     fOpaque = SkToBool(flags & kIsOpaque_Flag);
 
     SkAlphaType at = fOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
     SkImageInfo info = rt->surfacePriv().info(at).makeWH(width, height);
     SkPixelRef* pr = new SkGrPixelRef(info, rt);
     fLegacyBitmap.setInfo(info);
     fLegacyBitmap.setPixelRef(pr)->unref();
 
     fDrawContext.reset(this->context()->drawContext(rt, &this->surfaceProps()));
 }
 
-GrRenderTarget* SkGpuDevice::CreateRenderTarget(GrContext* context, SkSurface::Budgeted budgeted,
-                                                const SkImageInfo& origInfo, int sampleCount) {
+GrRenderTarget* SkGpuDevice::CreateRenderTarget(
+        GrContext* context, SkSurface::Budgeted budgeted, const SkImageInfo& origInfo,
+        int sampleCount, GrTextureStorageAllocator* textureStorageAllocator) {
     if (kUnknown_SkColorType == origInfo.colorType() ||
         origInfo.width() < 0 || origInfo.height() < 0) {
         return nullptr;
     }
 
     if (!context) {
         return nullptr;
     }
 
     SkColorType ct = origInfo.colorType();
     SkAlphaType at = origInfo.alphaType();
     if (kRGB_565_SkColorType == ct) {
         at = kOpaque_SkAlphaType;  // force this setting
     } else if (ct != kBGRA_8888_SkColorType && ct != kRGBA_8888_SkColorType) {
         // Fall back from whatever ct was to default of kRGBA or kBGRA which is aliased as kN32
         ct = kN32_SkColorType;
     }
     if (kOpaque_SkAlphaType != at) {
         at = kPremul_SkAlphaType;  // force this setting
     }
     const SkImageInfo info = SkImageInfo::Make(origInfo.width(), origInfo.height(), ct, at);
 
     GrSurfaceDesc desc;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = info.width();
     desc.fHeight = info.height();
     desc.fConfig = SkImageInfo2GrPixelConfig(info);
     desc.fSampleCnt = sampleCount;
+    desc.fTextureStorageAllocator = textureStorageAllocator;
     GrTexture* texture = context->textureProvider()->createTexture(
         desc, SkToBool(budgeted), nullptr, 0);
     if (nullptr == texture) {
         return nullptr;
     }
     SkASSERT(nullptr != texture->asRenderTarget());
     return texture->asRenderTarget();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 99 matching lines @@
 void SkGpuDevice::replaceRenderTarget(bool shouldRetainContent) {
     ASSERT_SINGLE_OWNER
     // Caller must have accessed the render target, because it knows the rt must be replaced.
     SkASSERT(!fNeedClear);
 
     SkSurface::Budgeted budgeted =
             fRenderTarget->resourcePriv().isBudgeted() ? SkSurface::kYes_Budgeted
                                                        : SkSurface::kNo_Budgeted;
 
     SkAutoTUnref<GrRenderTarget> newRT(CreateRenderTarget(
-        this->context(), budgeted, this->imageInfo(), fRenderTarget->desc().fSampleCnt));
+        this->context(), budgeted, this->imageInfo(), fRenderTarget->desc().fSampleCnt,
+        fRenderTarget->desc().fTextureStorageAllocator));
 
     if (nullptr == newRT) {
         return;
     }
 
     if (shouldRetainContent) {
         if (fRenderTarget->wasDestroyed()) {
             return;
         }
         this->context()->copySurface(newRT, fRenderTarget);
@@ skipping 1131 matching lines @@
                        fRenderTarget->isUnifiedMultisampled();
     bool doBicubic;
     GrTextureParams::FilterMode textureFilterMode =
         GrSkFilterQualityToGrFilterMode(paint.getFilterQuality(), *draw.fMatrix, SkMatrix::I(),
                                         &doBicubic);
     if (useFallback || doBicubic || GrTextureParams::kNone_FilterMode != textureFilterMode) {
         SkNinePatchIter iter(producer->width(), producer->height(), center, dst);
 
         SkRect srcR, dstR;
         while (iter.next(&srcR, &dstR)) {
-            this->drawTextureProducer(producer, &srcR, &dstR, SkCanvas::kStrict_SrcRectConstraint, 
+            this->drawTextureProducer(producer, &srcR, &dstR, SkCanvas::kStrict_SrcRectConstraint,
                                       *draw.fMatrix, fClip, paint);
         }
         return;
     }
 
     static const GrTextureParams::FilterMode kMode = GrTextureParams::kNone_FilterMode;
     SkAutoTUnref<const GrFragmentProcessor> fp(
         producer->createFragmentProcessor(SkMatrix::I(),
                                           SkRect::MakeIWH(producer->width(), producer->height()),
                                           GrTextureProducer::kNo_FilterConstraint, true,
@@ skipping 398 matching lines @@
 }
 
 SkImageFilter::Cache* SkGpuDevice::getImageFilterCache() {
     ASSERT_SINGLE_OWNER
     // We always return a transient cache, so it is freed after each
     // filter traversal.
     return SkGpuDevice::NewImageFilterCache();
 }
 
 #endif