ilikecats/stk-code_catmod
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Use some diffent value/equation for tonemap

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This commit is contained in:
Vincent Lejeune 2014-04-22 02:29:22 +02:00
parent 2aa6676050
commit b0e56ca2b0
3 changed files with 20 additions and 21 deletions
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22
data/shaders/tonemap.frag
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@ -1,4 +1,4 @@
#define AUTO_EXPOSURE
// From http://www.ceng.metu.edu.tr/~akyuz/files/hdrgpu.pdf
uniform sampler2D tex;
uniform sampler2D logluminancetex;
@ -9,19 +9,23 @@ out vec4 FragColor;
vec3 getCIEYxy(vec3 rgbColor);
vec3 getRGBFromCIEXxy(vec3 YxyColor);
float exposure = .2;
float whitePoint = 1.;
float exposure = .18;
float Lwhite = 1.;
float delta = .0001;
float saturation = 1.;
void main()
{
vec4 col = texture(tex, uv);
float avgLuminance = textureLod(logluminancetex, uv, 10.).x;
avgLuminance = max(exp(avgLuminance) - delta, delta);
float avgLw = textureLod(logluminancetex, uv, 10.).x;
avgLw = max(exp(avgLw) - delta, delta);
vec3 Yxy = getCIEYxy(col.xyz);
float Lp = Yxy.r * exposure / avgLuminance;
Yxy.r = (Lp * (1. * Lp / (whitePoint * whitePoint))) / (1. + Lp);
FragColor = vec4(getRGBFromCIEXxy(Yxy), 1.);
vec3 Cw = getCIEYxy(col.xyz);
float Lw = Cw.y;
float L = Lw * exposure / avgLw;
float Ld = L * (1. + L / (Lwhite * Lwhite));
Ld /= (1. + L);
FragColor = vec4(Ld * pow(col.xyz / Lw, vec3(saturation)), 1.);
}

7
data/shaders/utils/getCIEXYZ.frag
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@ -3,15 +3,10 @@
vec3 getCIEYxy(vec3 rgbColor)
{
// convert rgb to srgb
vec3 sRGBColor = rgbColor;//vec3(pow(rgbColor.x, 1. / 2.2), pow(rgbColor.y, 1. / 2.2), pow(rgbColor.z, 1. / 2.2));
mat3 sRGB2XYZ = transpose(mat3(
vec3(.4125, .2126, .0193),
vec3(.3576, .7152, .1192),
vec3(.1805, .0722, .9505)));
vec3 XYZ = sRGB2XYZ * sRGBColor;
float sum = dot(vec3(1.), XYZ);
return vec3(XYZ.y, XYZ.xy / sum);
return sRGB2XYZ * rgbColor;
}

10
src/graphics/post_processing.cpp
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@ -637,11 +637,6 @@ void PostProcessing::render()
glDisable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
computeLogLuminance(in_rtt);
toneMap(out_fbo, in_rtt);
std::swap(in_rtt, out_rtt);
std::swap(in_fbo, out_fbo);
PROFILER_PUSH_CPU_MARKER("- Bloom", 0xFF, 0x00, 0x00);
if (UserConfigParams::m_bloom)
{
@ -699,6 +694,11 @@ void PostProcessing::render()
PROFILER_POP_CPU_MARKER();
computeLogLuminance(in_rtt);
toneMap(out_fbo, in_rtt);
std::swap(in_rtt, out_rtt);
std::swap(in_fbo, out_fbo);
PROFILER_PUSH_CPU_MARKER("- Godrays", 0xFF, 0x00, 0x00);
if (UserConfigParams::m_light_shaft && m_sunpixels > 30)//World::getWorld()->getTrack()->hasGodRays() && ) // god rays
{