private void MensureLuminance(GraphicDevice device, IShaderStage stage)
{
effect.Technique = HdrEffect.SampleAvgLum;
RenderTexture2D dest = _rtToneMap[Tonemaptextures - 1];
RenderTexture2D source = _rtHdrScene;
dest.SetTarget(device);
source.SetTexture(0, device);
stage.SetSampler(0, _linearSampler);
device.Clear(ClearFlags.Target, Color4.Black, 1, 0);
_quadRender.DrawQuad(effect);
effect.Technique = HdrEffect.ResampleAvgLum;
stage.SetSampler(0, _pointSampler);
for (int i = Tonemaptextures - 2; i > 0; i--)
{
dest = _rtToneMap[i];
source = _rtToneMap[i + 1];
dest.SetTarget(device);
source.SetTexture(0, device);
device.Clear(ClearFlags.Target, Color4.Black, 1, 0);
_quadRender.DrawQuad(effect);
}
effect.Technique = HdrEffect.ResampleAvgLumExp;
source = _rtToneMap[1];
dest = _rtToneMap[0];
dest.SetTarget(device);
source.SetTexture(0, device);
device.Clear(ClearFlags.Target, Color4.Black, 1, 0);
_quadRender.DrawQuad(effect);
}
protected override void Set(SamplerState state)
{
stage.SetSampler(index, state);
}