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cbuffer globalParams
{
float2 screenSize;
float elapsedTime;
int captureState;
}
cbuffer controlBuf
{
float g_sldExposure;
float g_sldHighlightsIntensity;
float g_sldShadowsIntensity;
float g_sldContrast;
float g_sldGamma;
}
Texture2D texColor;
SamplerState samLinear;
SamplerState samLinearWrap;
void PSMain(in float4 position : SV_Position, in float2 uv: TexCoord, out float4 color : SV_Target)
{
color = texColor.Sample(samLinear, uv);
color.rgb = ldexp(color.rgb, g_sldExposure * 2);
float3 shadows = smoothstep(0.666, 0.0, color.rgb);
float3 highlights = smoothstep(0.333, 1.0, color.rgb);
float3 rest = 1 - shadows - highlights;
color.rgb = pow(saturate(color.rgb), exp2(shadows * exp2(g_sldShadowsIntensity)
+ highlights * exp2(-g_sldHighlightsIntensity)
+ exp2(-g_sldGamma * 2)
+ rest - 2)); //correction so all sliders at 0 give 0 in sum
static const float contrastMin = log(0.5);
static const float contrastMax = log(2.0);
float contrastFactor = exp(contrastMin + (g_sldContrast * 0.5 + 0.5) * (contrastMax - contrastMin));
color.rgb = (color.rgb - 0.5) * contrastFactor + 0.5;
}