/// <summary>
/// Starts draw.
/// This sets primitive type and instanced draw parameters.
/// </summary>
/// <param name="argument">Method call argument</param>
public void DrawBegin(int argument)
{
bool incrementInstance = (argument & (1 << 26)) != 0;
bool resetInstance = (argument & (1 << 27)) == 0;
if (_state.State.PrimitiveTypeOverrideEnable)
{
PrimitiveTypeOverride typeOverride = _state.State.PrimitiveTypeOverride;
DrawBegin(incrementInstance, resetInstance, typeOverride.Convert());
}
else
{
PrimitiveType type = (PrimitiveType)(argument & 0xffff);
DrawBegin(incrementInstance, resetInstance, type.Convert());
}
}
/// <summary>
/// Performs a indexed draw with a low number of index buffer elements,
/// while optionally also pre-incrementing the current instance value.
/// </summary>
/// <param name="state">Current GPU state</param>
/// <param name="argument">Method call argument</param>
/// <param name="instanced">True to increment the current instance value, false otherwise</param>
private void DrawIndexedSmall(GpuState state, int argument, bool instanced)
{
PrimitiveTypeOverride typeOverride = state.Get <PrimitiveTypeOverride>(MethodOffset.PrimitiveTypeOverride);
DrawBegin(instanced, !instanced, typeOverride.Convert());
int firstIndex = argument & 0xffff;
int indexCount = (argument >> 16) & 0xfff;
bool oldDrawIndexed = _drawIndexed;
_drawIndexed = true;
DrawEnd(state, firstIndex, indexCount);
_drawIndexed = oldDrawIndexed;
}
/// <summary>
/// Performs a indexed draw with a low number of index buffer elements,
/// while optionally also pre-incrementing the current instance value.
/// </summary>
/// <param name="engine">3D engine where this method is being called</param>
/// <param name="argument">Method call argument</param>
/// <param name="instanced">True to increment the current instance value, false otherwise</param>
private void DrawIndexedSmall(ThreedClass engine, int argument, bool instanced)
{
PrimitiveTypeOverride typeOverride = _state.State.PrimitiveTypeOverride;
DrawBegin(instanced, !instanced, typeOverride.Convert());
int firstIndex = argument & 0xffff;
int indexCount = (argument >> 16) & 0xfff;
bool oldDrawIndexed = _drawState.DrawIndexed;
_drawState.DrawIndexed = true;
DrawEnd(engine, firstIndex, indexCount);
_drawState.DrawIndexed = oldDrawIndexed;
}
/// <summary>
/// Starts draw.
/// This sets primitive type and instanced draw parameters.
/// </summary>
/// <param name="state">Current GPU state</param>
/// <param name="argument">Method call argument</param>
private void DrawBegin(GpuState state, int argument)
{
bool incrementInstance = (argument & (1 << 26)) != 0;
bool resetInstance = (argument & (1 << 27)) == 0;
PrimitiveType type = (PrimitiveType)(argument & 0xffff);
PrimitiveTypeOverride typeOverride = state.Get <PrimitiveTypeOverride>(MethodOffset.PrimitiveTypeOverride);
if (typeOverride != PrimitiveTypeOverride.Invalid)
{
DrawBegin(incrementInstance, resetInstance, typeOverride.Convert());
}
else
{
DrawBegin(incrementInstance, resetInstance, type.Convert());
}
}
