public void SetRenderTargets(params RenderTargetBinding[] renderTargets)
{
// Checking for redundant SetRenderTargets...
if (renderTargets == null && RenderTargetCount == 0)
{
return;
}
else if (renderTargets != null && renderTargets.Length == RenderTargetCount)
{
bool isRedundant = true;
for (int i = 0; i < renderTargets.Length; i += 1)
{
if (renderTargets[i].RenderTarget != renderTargetBindings[i].RenderTarget ||
renderTargets[i].CubeMapFace != renderTargetBindings[i].CubeMapFace)
{
isRedundant = false;
}
}
if (isRedundant)
{
return;
}
}
if (renderTargets == null || renderTargets.Length == 0)
{
GLDevice.SetRenderTargets(null, null, 0, DepthFormat.None);
// Set the viewport to the size of the backbuffer.
Viewport = new Viewport(0, 0, PresentationParameters.BackBufferWidth, PresentationParameters.BackBufferHeight);
// Set the scissor rectangle to the size of the backbuffer.
ScissorRectangle = new Rectangle(0, 0, PresentationParameters.BackBufferWidth, PresentationParameters.BackBufferHeight);
if (PresentationParameters.RenderTargetUsage == RenderTargetUsage.DiscardContents)
{
Clear(DiscardColor);
}
// Generate mipmaps for previous targets, if needed
for (int i = 0; i < RenderTargetCount; i += 1)
{
if (renderTargetBindings[i].RenderTarget.LevelCount > 1)
{
GLDevice.GenerateTargetMipmaps(
renderTargetBindings[i].RenderTarget.texture
);
}
}
Array.Clear(renderTargetBindings, 0, renderTargetBindings.Length);
RenderTargetCount = 0;
}
else
{
uint[] glTarget = new uint[renderTargets.Length];
OpenGLDevice.GLenum[] glTargetFace = new OpenGLDevice.GLenum[renderTargets.Length];
for (int i = 0; i < renderTargets.Length; i += 1)
{
glTarget[i] = renderTargets[i].RenderTarget.texture.Handle;
if (renderTargets[i].RenderTarget is RenderTarget2D)
{
glTargetFace[i] = OpenGLDevice.GLenum.GL_TEXTURE_2D;
}
else
{
glTargetFace[i] = OpenGLDevice.GLenum.GL_TEXTURE_CUBE_MAP_POSITIVE_X + (int)renderTargets[i].CubeMapFace;
}
}
IRenderTarget target = renderTargets[0].RenderTarget as IRenderTarget;
GLDevice.SetRenderTargets(
glTarget,
glTargetFace,
target.DepthStencilBuffer,
target.DepthStencilFormat
);
// Generate mipmaps for previous targets, if needed
for (int i = 0; i < RenderTargetCount; i += 1)
{
if (renderTargetBindings[i].RenderTarget.LevelCount > 1)
{
// We only need to gen mipmaps if the target is no longer bound.
bool stillBound = false;
for (int j = 0; j < renderTargets.Length; j += 1)
{
if (renderTargetBindings[i].RenderTarget == renderTargets[j].RenderTarget)
{
stillBound = true;
break;
}
}
if (!stillBound)
{
GLDevice.GenerateTargetMipmaps(
renderTargetBindings[i].RenderTarget.texture
);
}
}
}
Array.Clear(renderTargetBindings, 0, renderTargetBindings.Length);
Array.Copy(renderTargets, renderTargetBindings, renderTargets.Length);
RenderTargetCount = renderTargets.Length;
// Set the viewport to the size of the first render target.
Viewport = new Viewport(0, 0, target.Width, target.Height);
// Set the scissor rectangle to the size of the first render target.
ScissorRectangle = new Rectangle(0, 0, target.Width, target.Height);
if (target.RenderTargetUsage == RenderTargetUsage.DiscardContents)
{
Clear(DiscardColor);
}
}
}
