/// <summary>
/// Performs a indirect multi-draw, with parameters from a GPU buffer.
/// </summary>
/// <param name="engine">3D engine where this method is being called</param>
/// <param name="topology">Primitive topology</param>
/// <param name="indirectBuffer">GPU buffer with the draw parameters, such as count, first index, etc</param>
/// <param name="parameterBuffer">GPU buffer with the draw count</param>
/// <param name="maxDrawCount">Maximum number of draws that can be made</param>
/// <param name="stride">Distance in bytes between each element on the <paramref name="indirectBuffer"/> array</param>
public void MultiDrawIndirectCount(
ThreedClass engine,
int indexCount,
PrimitiveTopology topology,
BufferRange indirectBuffer,
BufferRange parameterBuffer,
int maxDrawCount,
int stride)
{
engine.Write(IndexBufferCountMethodOffset * 4, indexCount);
_context.Renderer.Pipeline.SetPrimitiveTopology(topology);
_drawState.Topology = topology;
ConditionalRenderEnabled renderEnable = ConditionalRendering.GetRenderEnable(
_context,
_channel.MemoryManager,
_state.State.RenderEnableAddress,
_state.State.RenderEnableCondition);
if (renderEnable == ConditionalRenderEnabled.False)
{
_drawState.DrawIndexed = false;
return;
}
_drawState.FirstIndex = _state.State.IndexBufferState.First;
_drawState.IndexCount = indexCount;
engine.UpdateState();
if (_drawState.DrawIndexed)
{
_context.Renderer.Pipeline.MultiDrawIndexedIndirectCount(indirectBuffer, parameterBuffer, maxDrawCount, stride);
}
else
{
_context.Renderer.Pipeline.MultiDrawIndirectCount(indirectBuffer, parameterBuffer, maxDrawCount, stride);
}
_drawState.DrawIndexed = false;
if (renderEnable == ConditionalRenderEnabled.Host)
{
_context.Renderer.Pipeline.EndHostConditionalRendering();
}
}
/// <summary>
/// Finishes the draw call.
/// This draws geometry on the bound buffers based on the current GPU state.
/// </summary>
/// <param name="engine">3D engine where this method is being called</param>
/// <param name="firstIndex">Index of the first index buffer element used on the draw</param>
/// <param name="indexCount">Number of index buffer elements used on the draw</param>
private void DrawEnd(ThreedClass engine, int firstIndex, int indexCount)
{
ConditionalRenderEnabled renderEnable = ConditionalRendering.GetRenderEnable(
_context,
_channel.MemoryManager,
_state.State.RenderEnableAddress,
_state.State.RenderEnableCondition);
if (renderEnable == ConditionalRenderEnabled.False || _instancedDrawPending)
{
if (renderEnable == ConditionalRenderEnabled.False)
{
PerformDeferredDraws();
}
_drawState.DrawIndexed = false;
if (renderEnable == ConditionalRenderEnabled.Host)
{
_context.Renderer.Pipeline.EndHostConditionalRendering();
}
return;
}
_drawState.FirstIndex = firstIndex;
_drawState.IndexCount = indexCount;
engine.UpdateState();
bool instanced = _drawState.VsUsesInstanceId || _drawState.IsAnyVbInstanced;
if (instanced)
{
_instancedDrawPending = true;
_instancedIndexed = _drawState.DrawIndexed;
_instancedFirstIndex = firstIndex;
_instancedFirstVertex = (int)_state.State.FirstVertex;
_instancedFirstInstance = (int)_state.State.FirstInstance;
_instancedIndexCount = indexCount;
var drawState = _state.State.VertexBufferDrawState;
_instancedDrawStateFirst = drawState.First;
_instancedDrawStateCount = drawState.Count;
_drawState.DrawIndexed = false;
if (renderEnable == ConditionalRenderEnabled.Host)
{
_context.Renderer.Pipeline.EndHostConditionalRendering();
}
return;
}
int firstInstance = (int)_state.State.FirstInstance;
int inlineIndexCount = _drawState.IbStreamer.GetAndResetInlineIndexCount();
if (inlineIndexCount != 0)
{
int firstVertex = (int)_state.State.FirstVertex;
BufferRange br = new BufferRange(_drawState.IbStreamer.GetInlineIndexBuffer(), 0, inlineIndexCount * 4);
_channel.BufferManager.SetIndexBuffer(br, IndexType.UInt);
_context.Renderer.Pipeline.DrawIndexed(inlineIndexCount, 1, firstIndex, firstVertex, firstInstance);
}
else if (_drawState.DrawIndexed)
{
int firstVertex = (int)_state.State.FirstVertex;
_context.Renderer.Pipeline.DrawIndexed(indexCount, 1, firstIndex, firstVertex, firstInstance);
}
else
{
var drawState = _state.State.VertexBufferDrawState;
_context.Renderer.Pipeline.Draw(drawState.Count, 1, drawState.First, firstInstance);
}
_drawState.DrawIndexed = false;
if (renderEnable == ConditionalRenderEnabled.Host)
{
_context.Renderer.Pipeline.EndHostConditionalRendering();
}
}
/// <summary>
/// Clears the current color and depth-stencil buffers.
/// Which buffers should be cleared is also specified on the argument.
/// </summary>
/// <param name="engine">3D engine where this method is being called</param>
/// <param name="argument">Method call argument</param>
public void Clear(ThreedClass engine, int argument)
{
ConditionalRenderEnabled renderEnable = ConditionalRendering.GetRenderEnable(
_context,
_channel.MemoryManager,
_state.State.RenderEnableAddress,
_state.State.RenderEnableCondition);
if (renderEnable == ConditionalRenderEnabled.False)
{
return;
}
// Scissor and rasterizer discard also affect clears.
engine.UpdateState((1UL << StateUpdater.RasterizerStateIndex) | (1UL << StateUpdater.ScissorStateIndex));
int index = (argument >> 6) & 0xf;
engine.UpdateRenderTargetState(useControl: false, singleUse: index);
_channel.TextureManager.UpdateRenderTargets();
bool clearDepth = (argument & 1) != 0;
bool clearStencil = (argument & 2) != 0;
uint componentMask = (uint)((argument >> 2) & 0xf);
if (componentMask != 0)
{
var clearColor = _state.State.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.State.ClearDepthValue;
int stencilValue = (int)_state.State.ClearStencilValue;
int stencilMask = 0;
if (clearStencil)
{
stencilMask = _state.State.StencilTestState.FrontMask;
}
_context.Renderer.Pipeline.ClearRenderTargetDepthStencil(
depthValue,
clearDepth,
stencilValue,
stencilMask);
}
engine.UpdateRenderTargetState(useControl: true);
if (renderEnable == ConditionalRenderEnabled.Host)
{
_context.Renderer.Pipeline.EndHostConditionalRendering();
}
}
