FOpenGLViewport::FOpenGLViewport(FOpenGLDynamicRHI* InOpenGLRHI,void* InWindowHandle,uint32 InSizeX,uint32 InSizeY,bool bInIsFullscreen,EPixelFormat PreferredPixelFormat)
: OpenGLRHI(InOpenGLRHI)
, OpenGLContext(NULL)
, SizeX(0)
, SizeY(0)
, bIsFullscreen(false)
, PixelFormat(PreferredPixelFormat)
, bIsValid(true)
, FrameSyncEvent(InOpenGLRHI)
{
check(OpenGLRHI);
//@to-do spurious check for HTML5, will need to go away.
#if !PLATFORM_HTML5
check(InWindowHandle);
#endif
check(IsInGameThread());
PlatformGlGetError(); // flush out old errors.
OpenGLRHI->Viewports.Add(this);
check(PlatformOpenGLCurrentContext(OpenGLRHI->PlatformDevice) == CONTEXT_Shared);
OpenGLContext = PlatformCreateOpenGLContext(OpenGLRHI->PlatformDevice, InWindowHandle);
Resize(InSizeX, InSizeY, bInIsFullscreen);
check(PlatformOpenGLCurrentContext(OpenGLRHI->PlatformDevice) == CONTEXT_Shared);
BeginInitResource(&FrameSyncEvent);
}
void FOpenGLDynamicRHI::RHIBeginDrawingViewport(FViewportRHIParamRef ViewportRHI, FTextureRHIParamRef RenderTarget)
{
VERIFY_GL_SCOPE();
FOpenGLViewport* Viewport = ResourceCast(ViewportRHI);
SCOPE_CYCLE_COUNTER(STAT_OpenGLPresentTime);
check(!DrawingViewport);
DrawingViewport = Viewport;
bRevertToSharedContextAfterDrawingViewport = false;
EOpenGLCurrentContext CurrentContext = PlatformOpenGLCurrentContext( PlatformDevice );
if( CurrentContext != CONTEXT_Rendering )
{
check(CurrentContext == CONTEXT_Shared);
check(!bIsRenderingContextAcquired || !GUseThreadedRendering);
bRevertToSharedContextAfterDrawingViewport = true;
PlatformRenderingContextSetup(PlatformDevice);
}
if(!GPUProfilingData.FrameTiming.IsInitialized())
{
GPUProfilingData.FrameTiming.InitResource();
}
// Set the render target and viewport.
if( RenderTarget )
{
FRHIRenderTargetView RTV(RenderTarget);
RHISetRenderTargets(1, &RTV, nullptr, 0, NULL);
}
else
{
FRHIRenderTargetView RTV(DrawingViewport->GetBackBuffer());
RHISetRenderTargets(1, &RTV, nullptr, 0, NULL);
}
}
void FOpenGLDynamicRHI::RHIBeginDrawingViewport(FViewportRHIParamRef ViewportRHI, FTextureRHIParamRef RenderTarget)
{
VERIFY_GL_SCOPE();
DYNAMIC_CAST_OPENGLRESOURCE(Viewport,Viewport);
SCOPE_CYCLE_COUNTER(STAT_OpenGLPresentTime);
check(!DrawingViewport);
DrawingViewport = Viewport;
bRevertToSharedContextAfterDrawingViewport = false;
EOpenGLCurrentContext CurrentContext = PlatformOpenGLCurrentContext( PlatformDevice );
if( CurrentContext != CONTEXT_Rendering )
{
check(CurrentContext == CONTEXT_Shared);
check(!bIsRenderingContextAcquired);
bRevertToSharedContextAfterDrawingViewport = true;
PlatformRenderingContextSetup(PlatformDevice);
}
if(!GPUProfilingData.FrameTiming.IsInitialized())
{
GPUProfilingData.FrameTiming.InitResource();
}
// Set the render target and viewport.
if( RenderTarget )
{
RHISetRenderTarget(RenderTarget, FTextureRHIRef());
}
else
{
RHISetRenderTarget(DrawingViewport->GetBackBuffer(), FTextureRHIRef());
}
}
