/// <summary>
/// Clears the current color and depth-stencil buffers.
/// Which buffers should be cleared is also specified on the argument.
/// </summary>
/// <param name="state">Current GPU state</param>
/// <param name="argument">Method call argument</param>
private void Clear(GpuState state, int argument)
{
if (!GetRenderEnable(state))
{
return;
}
// Scissor affects clears aswell.
if (state.QueryModified(MethodOffset.ScissorState))
{
UpdateScissorState(state);
}
UpdateRenderTargetState(state, useControl: false);
TextureManager.CommitGraphicsBindings();
bool clearDepth = (argument & 1) != 0;
bool clearStencil = (argument & 2) != 0;
uint componentMask = (uint)((argument >> 2) & 0xf);
int index = (argument >> 6) & 0xf;
if (componentMask != 0)
{
var clearColor = state.Get <ClearColors>(MethodOffset.ClearColors);
ColorF color = new ColorF(
clearColor.Red,
clearColor.Green,
clearColor.Blue,
clearColor.Alpha);
_context.Renderer.Pipeline.ClearRenderTargetColor(index, componentMask, color);
}
if (clearDepth || clearStencil)
{
float depthValue = state.Get <float>(MethodOffset.ClearDepthValue);
int stencilValue = state.Get <int> (MethodOffset.ClearStencilValue);
int stencilMask = 0;
if (clearStencil)
{
stencilMask = state.Get <StencilTestState>(MethodOffset.StencilTestState).FrontMask;
}
_context.Renderer.Pipeline.ClearRenderTargetDepthStencil(
depthValue,
clearDepth,
stencilValue,
stencilMask);
}
UpdateRenderTargetState(state, useControl: true);
}
