/// <summary>
/// Renders the batch with custom alpha and blend mode values, as well as a custom mvp matrix.
/// </summary>
public void Render(Matrix matrix, float alpha, uint blendMode)
{
if (_numQuads == 0)
{
return;
}
if (_syncRequired)
{
SyncBuffers(alpha);
}
if (blendMode == Display.BlendMode.AUTO)
{
throw new InvalidOperationException("Cannot render object with blend mode AUTO");
}
bool useTinting = _tinted || alpha != 1.0f;
_baseEffect.PrepareToDraw(matrix, _premultipliedAlpha, alpha, useTinting, _texture);
Display.BlendMode.ApplyBlendFactors(blendMode, _premultipliedAlpha);
int attribPosition = _baseEffect.AttribPosition;
GL.EnableVertexAttribArray(attribPosition);
int attribColor = _baseEffect.AttribColor;
if (useTinting)
{
GL.EnableVertexAttribArray(attribColor);
}
int attribTexCoords = _baseEffect.AttribTexCoords;
if (_texture != null)
{
GL.EnableVertexAttribArray(attribTexCoords);
}
GL.BindBuffer(BufferTarget.ArrayBuffer, _vertexBufferName);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, _indexBufferName);
GL.VertexAttribPointer(attribPosition, 2, VertexAttribPointerType.Float, false, Vertex.SIZE, (IntPtr)Vertex.POSITION_OFFSET);
if (_texture != null)
{
GL.VertexAttribPointer(attribTexCoords, 2, VertexAttribPointerType.Float, false, Vertex.SIZE, (IntPtr)Vertex.TEXTURE_OFFSET);
}
if (useTinting)
{
GL.BindBuffer(BufferTarget.ArrayBuffer, _vertexColorsBufferName);
GL.VertexAttribPointer(attribColor, 4, VertexAttribPointerType.UnsignedByte, true, sizeof(float), (IntPtr)0);
}
int numIndices = _numQuads * INDICES_PER_QUAD;
GL.DrawElements(BeginMode.Triangles, numIndices, DrawElementsType.UnsignedShort, IntPtr.Zero);
// GL.DrawElements (All.TriangleStrip, numIndices, All.UnsignedShort, IntPtr.Zero);
}
