Add a new class AcceleratedStaticBitmap : StaticBitmapImage

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

 // Copyright 2014 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 "gpu/command_buffer/client/gles2_interface.h"
+#include "platform/graphics/AcceleratedStaticBitmapImage.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/ImageObserver.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)
 {
     if (!image)
         return nullptr;
+    if (image->isTextureBacked())
+        return AcceleratedStaticBitmapImage::create(image);

[Justin Novosad, 2016/08/02 15:26:00]

Excellent!

     return adoptRef(new StaticBitmapImage(image));
 }
 
-PassRefPtr<StaticBitmapImage> StaticBitmapImage::create(WebExternalTextureMailbox& mailbox)
-{
-    return adoptRef(new StaticBitmapImage(mailbox));
-}
-
 StaticBitmapImage::StaticBitmapImage(PassRefPtr<SkImage> image) : m_image(image)
 {
     ASSERT(m_image);
 }
 
-StaticBitmapImage::StaticBitmapImage(WebExternalTextureMailbox& mailbox) : m_mailbox(mailbox)
-{
-}
-
-StaticBitmapImage::~StaticBitmapImage() { }
-
 IntSize StaticBitmapImage::size() const
 {
-    if (!m_image)
-        return IntSize(m_mailbox.textureSize.width, m_mailbox.textureSize.height);
     return IntSize(m_image->width(), m_image->height());
 }
 
 bool StaticBitmapImage::isTextureBacked()
 {
     return m_image && m_image->isTextureBacked();
 }
 
 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)
-{
-    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)
-{
-    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)
-{
-    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()
 {
-    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