bool ImageBuffer::copyToPlatformTexture(WebGraphicsContext3D* context, Platform3DObject texture, GLenum internalFormat, GLenum destType, GLint level, bool premultiplyAlpha, bool flipY)
{
if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(GL_TEXTURE_2D, internalFormat, destType, level))
return false;
if (!isSurfaceValid())
return false;
RefPtr<const SkImage> textureImage = m_surface->newImageSnapshot(PreferAcceleration);
if (!textureImage)
return false;
if (!m_surface->isAccelerated())
return false;
ASSERT(textureImage->isTextureBacked()); // isAccelerated() check above should guarantee this
// Get the texture ID, flushing pending operations if needed.
Platform3DObject textureId = textureImage->getTextureHandle(true);
if (!textureId)
return false;
OwnPtr<WebGraphicsContext3DProvider> provider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
if (!provider)
return false;
WebGraphicsContext3D* sharedContext = provider->context3d();
if (!sharedContext)
return false;
OwnPtr<WebExternalTextureMailbox> mailbox = adoptPtr(new WebExternalTextureMailbox);
// Contexts may be in a different share group. We must transfer the texture through a mailbox first
sharedContext->genMailboxCHROMIUM(mailbox->name);
sharedContext->produceTextureDirectCHROMIUM(textureId, GL_TEXTURE_2D, mailbox->name);
sharedContext->flush();
mailbox->validSyncToken = sharedContext->insertSyncPoint(mailbox->syncToken);
if (mailbox->validSyncToken)
context->waitSyncToken(mailbox->syncToken);
Platform3DObject sourceTexture = context->createAndConsumeTextureCHROMIUM(GL_TEXTURE_2D, mailbox->name);
// The canvas is stored in a premultiplied format, so unpremultiply if necessary.
// The canvas is stored in an inverted position, so the flip semantics are reversed.
context->copyTextureCHROMIUM(GL_TEXTURE_2D, sourceTexture, texture, internalFormat, destType, flipY ? GL_FALSE : GL_TRUE, GL_FALSE, premultiplyAlpha ? GL_FALSE : GL_TRUE);
context->deleteTexture(sourceTexture);
context->flush();
WGC3Dbyte syncToken[24];
if (context->insertSyncPoint(syncToken))
sharedContext->waitSyncToken(syncToken);
// Undo grContext texture binding changes introduced in this function
provider->grContext()->resetContext(kTextureBinding_GrGLBackendState);
return true;
}
bool ImageBuffer::copyToPlatformTexture(WebGraphicsContext3D* context, Platform3DObject texture, GLenum internalFormat, GLenum destType, GLint level, bool premultiplyAlpha, bool flipY)
{
if (!m_surface->isAccelerated() || !getBackingTexture() || !isSurfaceValid())
return false;
if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(internalFormat, destType, level))
return false;
OwnPtr<WebGraphicsContext3DProvider> provider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
if (!provider)
return false;
WebGraphicsContext3D* sharedContext = provider->context3d();
if (!sharedContext)
return false;
OwnPtr<WebExternalTextureMailbox> mailbox = adoptPtr(new WebExternalTextureMailbox);
// Contexts may be in a different share group. We must transfer the texture through a mailbox first
sharedContext->genMailboxCHROMIUM(mailbox->name);
sharedContext->produceTextureDirectCHROMIUM(getBackingTexture(), GL_TEXTURE_2D, mailbox->name);
sharedContext->flush();
mailbox->syncPoint = sharedContext->insertSyncPoint();
context->waitSyncPoint(mailbox->syncPoint);
Platform3DObject sourceTexture = context->createAndConsumeTextureCHROMIUM(GL_TEXTURE_2D, mailbox->name);
// The canvas is stored in a premultiplied format, so unpremultiply if necessary.
context->pixelStorei(GC3D_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, !premultiplyAlpha);
// The canvas is stored in an inverted position, so the flip semantics are reversed.
context->pixelStorei(GC3D_UNPACK_FLIP_Y_CHROMIUM, !flipY);
context->copyTextureCHROMIUM(GL_TEXTURE_2D, sourceTexture, texture, level, internalFormat, destType);
context->pixelStorei(GC3D_UNPACK_FLIP_Y_CHROMIUM, false);
context->pixelStorei(GC3D_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, false);
context->deleteTexture(sourceTexture);
context->flush();
sharedContext->waitSyncPoint(context->insertSyncPoint());
// Undo grContext texture binding changes introduced in this function
provider->grContext()->resetContext(kTextureBinding_GrGLBackendState);
return true;
}
