void UCanvasRenderTarget2D::UpdateResource()
{
// Call parent implementation
Super::UpdateResource();
// Don't allocate canvas object for CRT2D CDO
if(IsTemplate())
{
return;
}
// Create or find the canvas object to use to render onto the texture. Multiple canvas render target textures can share the same canvas.
static const FName CanvasName( TEXT( "CanvasRenderTarget2DCanvas" ) );
UCanvas* Canvas = (UCanvas*)StaticFindObjectFast(UCanvas::StaticClass(), GetTransientPackage(), CanvasName );
if (Canvas == nullptr)
{
Canvas = ConstructObject<UCanvas>(UCanvas::StaticClass(), GetTransientPackage(), CanvasName );
Canvas->AddToRoot();
}
Canvas->Init(GetSurfaceWidth(), GetSurfaceHeight(), nullptr);
Canvas->Update();
// Update the resource immediately to remove it from the deferred resource update list. This prevents the texture
// from being cleared each frame.
UpdateResourceImmediate();
// Enqueue the rendering command to set up the rendering canvas.
ENQUEUE_UNIQUE_RENDER_COMMAND_ONEPARAMETER
(
CanvasRenderTargetMakeCurrentCommand,
FTextureRenderTarget2DResource*,
TextureRenderTarget,
(FTextureRenderTarget2DResource*)GameThread_GetRenderTargetResource(),
{
SetRenderTarget(RHICmdList, TextureRenderTarget->GetRenderTargetTexture(), FTexture2DRHIRef());
RHICmdList.SetViewport(0, 0, 0.0f, TextureRenderTarget->GetSizeXY().X, TextureRenderTarget->GetSizeXY().Y, 1.0f);
}
FString UMediaTexture::GetDesc()
{
return FString::Printf(TEXT("%dx%d [%s]"), GetSurfaceWidth(), GetSurfaceHeight(), GPixelFormats[PF_B8G8R8A8].Name);
}
