/// <summary>
/// Sets the current render target.
/// </summary>
private void SetRenderTargetInternal(RenderTarget2D renderTarget,
Color?clearColor = null, Double?clearDepth = null, Int32?clearStencil = null)
{
Ultraviolet.ValidateResource(renderTarget);
var usage = renderTarget?.RenderTargetUsage ?? backBufferRenderTargetUsage;
if (usage == RenderTargetUsage.PlatformContents)
{
usage = Capabilities.SupportsPreservingRenderTargetContentInHardware ?
RenderTargetUsage.PreserveContents :
RenderTargetUsage.DiscardContents;
}
var oglRenderTarget = (OpenGLRenderTarget2D)renderTarget;
if (oglRenderTarget != this.renderTarget)
{
var targetName = gl.DefaultFramebuffer;
var targetSize = Size2.Zero;
if (oglRenderTarget != null)
{
oglRenderTarget.ValidateStatus();
targetName = oglRenderTarget.OpenGLName;
targetSize = renderTarget.Size;
}
else
{
var currentWindow = Ultraviolet.GetPlatform().Windows.GetCurrent();
if (currentWindow != null)
{
targetSize = currentWindow.DrawableSize;
}
}
OpenGLState.BindFramebuffer(targetName);
if (this.renderTarget != null)
{
this.renderTarget.UnbindWrite();
}
this.renderTarget = oglRenderTarget;
if (this.renderTarget != null)
{
this.renderTarget.BindWrite();
}
this.viewport = default(Viewport);
SetViewport(new Viewport(0, 0, targetSize.Width, targetSize.Height));
if (usage == RenderTargetUsage.DiscardContents)
{
Clear(clearColor ?? Color.FromArgb(0xFF442288), clearDepth ?? 1.0, clearStencil ?? 0);
}
}
}