bool ImageBuffer::copyToPlatformTexture(GraphicsContext3D& context, Platform3DObject texture, GC3Denum internalFormat, GC3Denum destType, GC3Dint level, bool premultiplyAlpha, bool flipY)
{
if (!m_layerBridge || !platformLayer() || !isValid())
return false;
Platform3DObject sourceTexture = m_layerBridge->backBufferTexture();
if (!context.makeContextCurrent())
return false;
Extensions3D* extensions = context.extensions();
if (!extensions->supports("GL_CHROMIUM_copy_texture") || !extensions->supports("GL_CHROMIUM_flipy")
|| !extensions->canUseCopyTextureCHROMIUM(internalFormat, destType, level))
return false;
// The canvas is stored in a premultiplied format, so unpremultiply if necessary.
context.pixelStorei(Extensions3D::UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, !premultiplyAlpha);
// The canvas is stored in an inverted position, so the flip semantics are reversed.
context.pixelStorei(Extensions3D::UNPACK_FLIP_Y_CHROMIUM, !flipY);
extensions->copyTextureCHROMIUM(GraphicsContext3D::TEXTURE_2D, sourceTexture, texture, level, internalFormat, destType);
context.pixelStorei(Extensions3D::UNPACK_FLIP_Y_CHROMIUM, false);
context.pixelStorei(Extensions3D::UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, false);
context.flush();
return true;
}
bool WebMediaPlayerClientImpl::copyVideoTextureToPlatformTexture(WebCore::GraphicsContext3D* context, Platform3DObject texture, GC3Dint level, GC3Denum type, GC3Denum internalFormat, bool premultiplyAlpha, bool flipY)
{
if (!context || !m_webMediaPlayer)
return false;
Extensions3D* extensions = context->extensions();
if (!extensions || !extensions->supports("GL_CHROMIUM_copy_texture") || !extensions->supports("GL_CHROMIUM_flipy")
|| !extensions->canUseCopyTextureCHROMIUM(internalFormat, type, level) || !context->makeContextCurrent())
return false;
WebGraphicsContext3D* webGraphicsContext3D = context->webContext();
return m_webMediaPlayer->copyVideoTextureToPlatformTexture(webGraphicsContext3D, texture, level, internalFormat, type, premultiplyAlpha, flipY);
}