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[client] egl: prepare for DXGI HDR10 support

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This commit is contained in:
Geoffrey McRae
2023-10-27 01:03:22 +11:00
parent 200b7b732c
commit 2f36aaff5c
6 changed files with 24 additions and 9 deletions
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3
client/renderers/EGL/shader/desktop_rgb.frag
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@@ -23,6 +23,7 @@ uniform int cbMode;
uniform bool isHDR;
uniform bool mapHDRtoSDR;
uniform float mapHDRGain;
uniform bool mapHDRPQ;
void main()
{
@@ -43,7 +44,7 @@ void main()
}
if (isHDR && mapHDRtoSDR)
color.rgb = mapToSDR(color.rgb, mapHDRGain);
color.rgb = mapToSDR(color.rgb, mapHDRGain, mapHDRPQ);
if (cbMode > 0)
color = cbTransform(color, cbMode);

10
client/renderers/EGL/shader/hdr.h
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@@ -40,7 +40,7 @@ float midGain(vec3 pixel)
min(pixel.r, pixel.g)); // min = b
}
vec3 compress(vec3 pixel, float gain)
vec3 compress(vec3 pixel)
{
float maxGain = maxGain(pixel);
return pixel * (maxGain < knee ? maxGain :
@@ -99,8 +99,10 @@ vec3 bt2020to709(vec3 bt2020)
bt2020.r * -0.0182 + bt2020.g * -0.1006 + bt2020.b * 1.1187);
}
vec3 mapToSDR(vec3 color, float gain)
vec3 mapToSDR(vec3 color, float gain, bool pq)
{
vec3 lin = bt2020to709(pq2lin(color.rgb, gain));
return lin2srgb(compress(lin, gain));
if (pq)
color = pq2lin(color.rgb, gain);
color = bt2020to709(color);
return lin2srgb(compress(color));
}