//------------------------------------------------------
// Auto Focus
//------------------------------------------------------
private void autoFocus(Texture depth_texture)
{
_pAutoFocus.bind();
_ssboAutoFocus.bind(0);
depth_texture.bind(_pAutoFocus.getSamplerUniform(0), 0);
GL.DispatchCompute(1, 1, 1);
GL.MemoryBarrier(MemoryBarrierFlags.ShaderStorageBarrierBit);
}
protected override void load_Buffers()
{
_ssboExposure = new ShaderStorageBuffer(new EngineHelper.size[]
{
EngineHelper.size.vec2
});
_ssboExposure.bind();
Vector2 default_luminosity = new Vector2(1000.0f, 0.0f);
GL.BufferData(BufferTarget.ShaderStorageBuffer, (int)EngineHelper.size.vec2, ref default_luminosity, BufferUsageHint.DynamicCopy);
_ssboExposure.unbind();
_tLuminosity = new Texture(TextureTarget.Texture2D,
_resolution.W, _resolution.H,
0, true, false,
PixelInternalFormat.R16f, PixelFormat.Red, PixelType.Float,
TextureMinFilter.LinearMipmapLinear, TextureMagFilter.Linear, TextureWrapMode.Clamp);
_tLuminosity.load();
_tTempScene = new Texture(TextureTarget.Texture2D,
_resolution.W, _resolution.H,
0, false, false,
PixelInternalFormat.Rgba16f, PixelFormat.Rgba, PixelType.Float,
TextureMinFilter.Linear, TextureMagFilter.Linear, TextureWrapMode.Clamp);
_tTempScene.load();
}
private void autoExposure()
{
_pAutoExposure.bind();
// Pass lowest LOD based on log2(max(dimension))
GL.Uniform1(_pAutoExposure.getUniform("luminosity_lod"), _tLuminosity.getMaxMipMap());
// Bind SSBO for storing luminosity
_ssboExposure.bind(0);
// Bind Scene Texture
_tLuminosity.bind(_pAutoExposure.getSamplerUniform(0), 0);
GL.DispatchCompute(1, 1, 1);
GL.MemoryBarrier(MemoryBarrierFlags.ShaderStorageBarrierBit);
_ssboExposure.unbind();
}