Add a new class AcceleratedStaticBitmap : StaticBitmapImage

third_party/WebKit/Source/platform/graphics/AcceleratedStaticBitmapImage.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "platform/graphics/StaticBitmapImage.h"
+#include "platform/graphics/AcceleratedStaticBitmapImage.h"
 
 #include "gpu/command_buffer/client/gles2_interface.h"
-#include "platform/graphics/GraphicsContext.h"
-#include "platform/graphics/ImageObserver.h"
+#include "platform/graphics/StaticBitmapImage.h"
+#include "platform/graphics/skia/SkiaUtils.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebGraphicsContext3DProvider.h"
 #include "skia/ext/texture_handle.h"
-#include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkImage.h"
-#include "third_party/skia/include/core/SkPaint.h"
-#include "third_party/skia/include/core/SkShader.h"
 #include "third_party/skia/include/gpu/GrContext.h"
 #include "wtf/PtrUtil.h"
 #include <memory>
 
 namespace blink {
 
-PassRefPtr<StaticBitmapImage> StaticBitmapImage::create(PassRefPtr<SkImage> image)
+PassRefPtr<AcceleratedStaticBitmapImage> AcceleratedStaticBitmapImage::create(WebExternalTextureMailbox& mailbox)
 {
-    if (!image)
-        return nullptr;
-    return adoptRef(new StaticBitmapImage(image));
+    return adoptRef(new AcceleratedStaticBitmapImage(mailbox));
 }
 
-PassRefPtr<StaticBitmapImage> StaticBitmapImage::create(WebExternalTextureMailbox& mailbox)
+PassRefPtr<AcceleratedStaticBitmapImage> AcceleratedStaticBitmapImage::create(PassRefPtr<SkImage> image)
 {
-    return adoptRef(new StaticBitmapImage(mailbox));
+    return adoptRef(new AcceleratedStaticBitmapImage(image));
 }
 
-StaticBitmapImage::StaticBitmapImage(PassRefPtr<SkImage> image) : m_image(image)
-{
-    ASSERT(m_image);
-}
-
-StaticBitmapImage::StaticBitmapImage(WebExternalTextureMailbox& mailbox) : m_mailbox(mailbox)
+AcceleratedStaticBitmapImage::AcceleratedStaticBitmapImage(WebExternalTextureMailbox& mailbox)
+    : StaticBitmapImage()
+    , m_mailbox(mailbox)
 {
 }
 
-StaticBitmapImage::~StaticBitmapImage() { }
-
-IntSize StaticBitmapImage::size() const
+AcceleratedStaticBitmapImage::AcceleratedStaticBitmapImage(PassRefPtr<SkImage> image)
+    : StaticBitmapImage(image)
 {
-    if (!m_image)
-        return IntSize(m_mailbox.textureSize.width, m_mailbox.textureSize.height);
-    return IntSize(m_image->width(), m_image->height());
 }
 
-bool StaticBitmapImage::isTextureBacked()
+IntSize AcceleratedStaticBitmapImage::size() const
 {
-    return m_image && m_image->isTextureBacked();
+    if (m_image)
+        return IntSize(m_image->width(), m_image->height());
+    return IntSize(m_mailbox.textureSize.width, m_mailbox.textureSize.height);
 }
 
-bool StaticBitmapImage::currentFrameKnownToBeOpaque(MetadataMode)
-{
-    return m_image->isOpaque();
-}
-
-void StaticBitmapImage::draw(SkCanvas* canvas, const SkPaint& paint, const FloatRect& dstRect,
-    const FloatRect& srcRect, RespectImageOrientationEnum, ImageClampingMode clampMode)
-{
-    FloatRect adjustedSrcRect = srcRect;
-    adjustedSrcRect.intersect(SkRect::Make(m_image->bounds()));
-
-    if (dstRect.isEmpty() || adjustedSrcRect.isEmpty())
-        return; // Nothing to draw.
-
-    canvas->drawImageRect(m_image.get(), adjustedSrcRect, dstRect, &paint,
-        WebCoreClampingModeToSkiaRectConstraint(clampMode));
-
-    if (ImageObserver* observer = getImageObserver())
-        observer->didDraw(this);
-}
-
-GLuint StaticBitmapImage::switchStorageToSkImage(WebGraphicsContext3DProvider* provider)
-{
-    if (!provider)
-        return 0;
-    GrContext* grContext = provider->grContext();
-    if (!grContext)
-        return 0;
-    gpu::gles2::GLES2Interface* gl = provider->contextGL();
-    if (!gl)
-        return 0;
-    gl->WaitSyncTokenCHROMIUM(m_mailbox.syncToken);
-    GLuint textureId = gl->CreateAndConsumeTextureCHROMIUM(GL_TEXTURE_2D, m_mailbox.name);
-    GrGLTextureInfo textureInfo;
-    textureInfo.fTarget = GL_TEXTURE_2D;
-    textureInfo.fID = textureId;
-    GrBackendTextureDesc backendTexture;
-    backendTexture.fOrigin = kBottomLeft_GrSurfaceOrigin;
-    backendTexture.fWidth = m_mailbox.textureSize.width;
-    backendTexture.fHeight = m_mailbox.textureSize.height;
-    backendTexture.fConfig = kSkia8888_GrPixelConfig;
-    backendTexture.fTextureHandle = skia::GrGLTextureInfoToGrBackendObject(textureInfo);
-    sk_sp<SkImage> skImage = SkImage::MakeFromAdoptedTexture(grContext, backendTexture);
-    m_image = fromSkSp(skImage);
-    return textureId;
-}
-
-void StaticBitmapImage::copyToTexture(WebGraphicsContext3DProvider* provider, GLuint destinationTexture, GLenum internalFormat, GLenum destType, bool flipY)
+void AcceleratedStaticBitmapImage::copyToTexture(WebGraphicsContext3DProvider* provider, GLuint destinationTexture, GLenum internalFormat, GLenum destType, bool flipY)
 {
     GLuint textureId = switchStorageToSkImageForWebGL(provider);
     gpu::gles2::GLES2Interface* gl = provider->contextGL();
     if (!gl)
         return;
     gl->CopyTextureCHROMIUM(textureId, destinationTexture, internalFormat, destType, flipY, false, false);
     const GLuint64 fenceSync = gl->InsertFenceSyncCHROMIUM();
     gl->Flush();
     GLbyte syncToken[24];
     gl->GenSyncTokenCHROMIUM(fenceSync, syncToken);
     // Get a new mailbox because we cannot retain a texture in the WebGL context.
     switchStorageToMailbox(provider);
 }
 
-bool StaticBitmapImage::switchStorageToMailbox(WebGraphicsContext3DProvider* provider)
+bool AcceleratedStaticBitmapImage::switchStorageToMailbox(WebGraphicsContext3DProvider* provider)
 {
     m_mailbox.textureSize = WebSize(m_image->width(), m_image->height());
     GrContext* grContext = provider->grContext();
     if (!grContext)
         return false;
     grContext->flush();
     m_mailbox.textureTarget = GL_TEXTURE_2D;
     gpu::gles2::GLES2Interface* gl = provider->contextGL();
     if (!gl)
         return false;
     GLuint textureID = skia::GrBackendObjectToGrGLTextureInfo(m_image->getTextureHandle(true))->fID;
     gl->BindTexture(GL_TEXTURE_2D, textureID);
 
     gl->GenMailboxCHROMIUM(m_mailbox.name);
     gl->ProduceTextureCHROMIUM(GL_TEXTURE_2D, m_mailbox.name);
     const GLuint64 fenceSync = gl->InsertFenceSyncCHROMIUM();
     gl->Flush();
     gl->GenSyncTokenCHROMIUM(fenceSync, m_mailbox.syncToken);
     m_mailbox.validSyncToken = true;
     gl->BindTexture(GL_TEXTURE_2D, 0);
     grContext->resetContext(kTextureBinding_GrGLBackendState);
     m_image = nullptr;
     return true;
 }
 
 // This function is called only in the case that m_image is texture backed.
-GLuint StaticBitmapImage::switchStorageToSkImageForWebGL(WebGraphicsContext3DProvider* contextProvider)
+GLuint AcceleratedStaticBitmapImage::switchStorageToSkImageForWebGL(WebGraphicsContext3DProvider* contextProvider)
 {
     DCHECK(!m_image || m_image->isTextureBacked());
     GLuint textureId = 0;
     if (m_image) {
         // SkImage is texture-backed on the shared context
         if (!hasMailbox()) {
             std::unique_ptr<WebGraphicsContext3DProvider> sharedProvider = wrapUnique(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
             if (!switchStorageToMailbox(sharedProvider.get()))
                 return 0;
             textureId = switchStorageToSkImage(contextProvider);
             return textureId;
         }
     }
     DCHECK(hasMailbox());
     textureId = switchStorageToSkImage(contextProvider);
     return textureId;
 }
 
-PassRefPtr<SkImage> StaticBitmapImage::imageForCurrentFrame()
+GLuint AcceleratedStaticBitmapImage::switchStorageToSkImage(WebGraphicsContext3DProvider* provider)
+{
+    if (!provider)
+        return 0;
+    GrContext* grContext = provider->grContext();
+    if (!grContext)
+        return 0;
+    gpu::gles2::GLES2Interface* gl = provider->contextGL();
+    if (!gl)
+        return 0;
+    gl->WaitSyncTokenCHROMIUM(m_mailbox.syncToken);
+    GLuint textureId = gl->CreateAndConsumeTextureCHROMIUM(GL_TEXTURE_2D, m_mailbox.name);
+    GrGLTextureInfo textureInfo;
+    textureInfo.fTarget = GL_TEXTURE_2D;
+    textureInfo.fID = textureId;
+    GrBackendTextureDesc backendTexture;
+    backendTexture.fOrigin = kBottomLeft_GrSurfaceOrigin;
+    backendTexture.fWidth = m_mailbox.textureSize.width;
+    backendTexture.fHeight = m_mailbox.textureSize.height;
+    backendTexture.fConfig = kSkia8888_GrPixelConfig;
+    backendTexture.fTextureHandle = skia::GrGLTextureInfoToGrBackendObject(textureInfo);
+    sk_sp<SkImage> skImage = SkImage::MakeFromAdoptedTexture(grContext, backendTexture);
+    m_image = fromSkSp(skImage);
+    return textureId;
+}
+
+PassRefPtr<SkImage> AcceleratedStaticBitmapImage::imageForCurrentFrame()
 {
     if (m_image)
         return m_image;
-    // No mailbox, return null;
     if (!hasMailbox())
         return nullptr;
     // Has mailbox, consume mailbox, prepare a new mailbox if contextProvider is not null (3D).
     DCHECK(isMainThread());
     // TODO(xidachen): make this work on a worker thread.
     std::unique_ptr<WebGraphicsContext3DProvider> sharedProvider = wrapUnique(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
     if (!switchStorageToSkImage(sharedProvider.get()))
         return nullptr;
     return m_image;
 }
 
 } // namespace blink