/// <summary>
/// Creates a new Painter object. Normally, it's not necessary to create any custom
/// painters; instead, use the global painter found on the Sparrow instance.
/// </summary>
public Painter(float width, float height)
{
_framebufferCache = new Dictionary <uint, uint>();
_actualBlendMode = BlendMode.NORMAL;
_backBufferWidth = width;
_backBufferHeight = height;
PixelSize = 1.0f;
_clipRectStack = new Stack <Rectangle>();
_batchProcessorCurr = new BatchProcessor();
_batchProcessorCurr.OnBatchComplete = DrawBatch;
_batchProcessorPrev = new BatchProcessor();
_batchProcessorPrev.OnBatchComplete = DrawBatch;
_batchProcessorSpec = new BatchProcessor();
_batchProcessorSpec.OnBatchComplete = DrawBatch;
_batchProcessor = _batchProcessorCurr;
_batchCacheExclusions = new List <DisplayObject>();
_state = new RenderState();
_state.OnDrawRequired = FinishMeshBatch;
_stateStack = new List <RenderState>();
_stateStackPos = -1;
_stateStackLength = 0;
}
private BatchProcessor SwapBatchProcessors()
{
BatchProcessor tmp = _batchProcessorPrev;
_batchProcessorPrev = _batchProcessorCurr;
return(_batchProcessorCurr = tmp);
}
/// <summary>
/// Completes all unfinished batches, cleanup procedures.
/// </summary>
public void FinishFrame()
{
if (_frameId % 99 == 0)
{
_batchProcessorCurr.Trim(); // odd number -> alternating processors
}
if (_frameId % 150 == 0)
{
_batchProcessorSpec.Trim();
}
_batchProcessor.FinishBatch();
_batchProcessor = _batchProcessorSpec; // no cache between frames
ProcessCacheExclusions();
}
/// <summary>
/// Resets the current state, state stack, batch processor, stencil reference value,
/// clipping rectangle, and draw count. Furthermore, depth testing is disabled.
/// </summary>
public void NextFrame()
{
// update batch processors
_batchProcessor = SwapBatchProcessors();
_batchProcessor.Clear();
_batchProcessorSpec.Clear();
// enforce reset of basic context settings
_actualBlendMode = BlendMode.NORMAL;
Gl.DepthFunc(DepthFunction.Always);
// reset everything else
_clipRectStack.Clear();
DrawCount = 0;
_stateStackPos = -1;
_state.Reset();
}