/**
* Following UpdateSurface(), mTexture on context this->gl() should contain the data we want,
* unless mDelayedUpdates is true because of a too-large surface.
*/
void
CanvasLayerOGL::UpdateSurface()
{
if (!IsDirty())
return;
Painted();
if (mDestroyed || mDelayedUpdates) {
return;
}
#if defined(GL_PROVIDER_GLX)
if (mPixmap) {
return;
}
#endif
gfxASurface* updatedSurface = nullptr;
gfxImageSurface* temporarySurface = nullptr;
bool nothingToShow = false;
if (mGLContext) {
SharedSurface* surf = mGLContext->RequestFrame();
if (surf) {
mLayerProgram = surf->HasAlpha() ? RGBALayerProgramType
: RGBXLayerProgramType;
switch (surf->Type()) {
case SharedSurfaceType::Basic: {
SharedSurface_Basic* readbackSurf = SharedSurface_Basic::Cast(surf);
updatedSurface = readbackSurf->GetData();
break;
}
case SharedSurfaceType::GLTextureShare: {
SharedSurface_GLTexture* textureSurf = SharedSurface_GLTexture::Cast(surf);
mTexture = textureSurf->Texture();
break;
}
#ifdef XP_MACOSX
case SharedSurfaceType::IOSurface: {
SharedSurface_IOSurface *ioSurf = SharedSurface_IOSurface::Cast(surf);
mTexture = ioSurf->Texture();
mTextureTarget = ioSurf->TextureTarget();
mLayerProgram = ioSurf->HasAlpha() ? RGBARectLayerProgramType : RGBXRectLayerProgramType;
break;
}
#endif
default:
MOZ_CRASH("Unacceptable SharedSurface type.");
}
} else {
nothingToShow = true;
}
} else if (mCanvasSurface) {
#ifdef XP_MACOSX
if (mDrawTarget && mDrawTarget->GetNativeSurface(gfx::NATIVE_SURFACE_CGCONTEXT_ACCELERATED)) {
if (!mTexture) {
mTexture = MakeIOSurfaceTexture((CGContextRef)mDrawTarget->GetNativeSurface(
gfx::NATIVE_SURFACE_CGCONTEXT_ACCELERATED),
gl());
mTextureTarget = LOCAL_GL_TEXTURE_RECTANGLE_ARB;
mLayerProgram = RGBARectLayerProgramType;
}
mDrawTarget->Flush();
return;
}
#endif
updatedSurface = mCanvasSurface;
} else {
MOZ_CRASH("Unhandled canvas layer type.");
}
if (updatedSurface) {
mOGLManager->MakeCurrent();
gfx::SurfaceFormat format =
gl()->UploadSurfaceToTexture(updatedSurface,
mBounds,
mUploadTexture,
true,//false,
nsIntPoint(0, 0));
mLayerProgram = ShaderProgramFromSurfaceFormat(format);
mTexture = mUploadTexture;
if (temporarySurface)
delete temporarySurface;
}
MOZ_ASSERT(mTexture || nothingToShow);
}
