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#version 450
#extension GL_ARB_separate_shader_objects : enable
#extension GL_ARB_shading_language_420pack : enable
layout(push_constant) uniform PushConsts {
float exposure;
float gamma;
float step;
float depthTreshold;
int maxStep;
};
vec3 Uncharted2Tonemap(vec3 color)
{
const float A = 0.15;
const float B = 0.50;
const float C = 0.10;
const float D = 0.20;
const float E = 0.02;
const float F = 0.30;
const float W = 11.2;
return ((color*(A*color+C*B)+D*E)/(color*(A*color+B)+D*F))-E/F;
}
vec4 tonemap(vec4 color, float exposure, float gamma)
{
vec3 outcol = Uncharted2Tonemap(color.rgb * exposure);
outcol = outcol * (1.0f / Uncharted2Tonemap(vec3(11.2f)));
return vec4(pow(outcol, vec3(1.0f / gamma)), color.a);
}
vec4 SRGBtoLINEAR(vec4 srgbIn)
{
#ifdef MANUAL_SRGB
#ifdef SRGB_FAST_APPROXIMATION
vec3 linOut = pow(srgbIn.xyz,vec3(2.2));
#else //SRGB_FAST_APPROXIMATION
vec3 bLess = step(vec3(0.04045),srgbIn.xyz);
vec3 linOut = mix( srgbIn.xyz/vec3(12.92), pow((srgbIn.xyz+vec3(0.055))/vec3(1.055),vec3(2.4)), bLess );
#endif //SRGB_FAST_APPROXIMATION
return vec4(linOut,srgbIn.w);;
#else //MANUAL_SRGB
return srgbIn;
#endif //MANUAL_SRGB
}
layout (constant_id = 0) const float NEAR_PLANE = 0.1f;
layout (constant_id = 1) const float FAR_PLANE = 32.0f;
layout (set = 0, binding = 0) uniform sampler2D uiImage;
layout (set = 0, binding = 1) uniform sampler2D samplerHDR;
layout (set = 0, binding = 2) uniform sampler2D gbPos;//gbuffer world pos + linear depth
layout (set = 0, binding = 3) uniform sampler2D gbN_AO;//gbuffer normal
layout (set = 0, binding = 4) uniform UBO {
mat4 projection;
mat4 model;
mat4 view;
vec4 camPos;
} ubo;
layout (location = 0) in vec2 inUV;
layout (location = 0) out vec4 outColor;
const float flteps = 0.001;
bool float_equ (float a, float b) {
return abs(a - b) < flteps;
}
float linearDepth(float depth)
{
float z = depth * 2.0f - 1.0f;
return (2.0f * NEAR_PLANE * FAR_PLANE) / (FAR_PLANE + NEAR_PLANE - z * (FAR_PLANE - NEAR_PLANE));
}
void main()
{
const float reflectionCoef = 0.4;
//ivec2 ts = textureSize(samplerHDR, 0);
//vec4 hdrColor = texelFetch (samplerHDR, ivec2(gl_FragCoord.xy), gl_SampleID);
//vec4 hdrColor = texelFetch (samplerHDR, inUV);
//vec4 c = texture (bloom, inUV);
//float lum = (0.299*c.r + 0.587*c.g + 0.114*c.b);
//if (lum>1.0)
// hdrColor.rgb += c.rgb * 0.05;
//outColor = SRGBtoLINEAR(tonemap(hdrColor, exposure, gamma));
vec4 hdrColor = texture(samplerHDR, inUV);
vec4 uiColor = texture(uiImage, inUV);
vec3 pos = texture(gbPos, inUV).rgb;
float depth = texture(gbPos, inUV).a;
vec3 n = texture(gbN_AO, inUV).rgb;
//outColor = vec4 (vec3(linDepth/100.0), 1);
if (float_equ (n.g, 1.0) && float_equ (pos.y, 0.0)) {
//reflecting plane
vec3 v = normalize(pos - ubo.camPos.xyz); // Vector from surface point to camera
vec3 reflection = normalize(reflect(v, n));
/*outColor = vec4 (reflection, 1);
return;*/
float curLength = step;
bool hit = false;
vec2 uv;
float s = step;
for (int i=0; i<maxStep; i++) {
vec3 curPos = pos + reflection * curLength;
vec4 ndc = ubo.projection * ubo.view * vec4(curPos, 1.0);
uv = vec2 ((ndc.x / ndc.w + 1.0) / 2.0, (ndc.y / ndc.w + 1.0) / 2.0);
if (uv.x < 0 || uv.y < 0 || uv.x > 1 || uv.y > 1)
break;
float linDepthCP = linearDepth (ndc.z / ndc.w);
vec4 cp = texture(gbPos, uv);
//outColor = vec4 (vec3 (linDepthCP/100.0), 1);
/*outColor = vec4 (1,0,0, 1);
return;*/
if (abs(linDepthCP - cp.a) < depthTreshold) {
/*outColor = vec4 (vec3(linDepthCP/100),1);
return;*/
hit = true;
break;
}
/*cp = textureOffset(gbPos, uv, ivec2 (0,1));
if (abs(linDepthCP - cp.a) < depthTreshold) {
hit = true;
break;
}
cp = textureOffset(gbPos, uv, ivec2 (1,0));
if (abs(linDepthCP - cp.a) < depthTreshold) {
hit = true;
break;
}
cp = textureOffset(gbPos, uv, ivec2 (0,-1));
if (abs(linDepthCP - cp.a) < depthTreshold) {
hit = true;
break;
}
cp = textureOffset(gbPos, uv, ivec2 (-1,0));
if (abs(linDepthCP - cp.a) < depthTreshold) {
hit = true;
break;
}
cp = textureOffset(gbPos, uv, ivec2 (1,1));
if (abs(linDepthCP - cp.a) < depthTreshold) {
hit = true;
break;
}
cp = textureOffset(gbPos, uv, ivec2 (1,-1));
if (abs(linDepthCP - cp.a) < depthTreshold) {
hit = true;
break;
}
cp = textureOffset(gbPos, uv, ivec2 (-1,-1));
if (abs(linDepthCP - cp.a) < depthTreshold) {
hit = true;
break;
}
cp = textureOffset(gbPos, uv, ivec2 (-1,1));
if (abs(linDepthCP - cp.a) < depthTreshold) {
hit = true;
break;
} */
curLength += s;
//s *= 1.2;
}
if (hit)
hdrColor = mix (hdrColor, texture(samplerHDR, uv), reflectionCoef);
//hdrColor = vec4 (1,0,0,1);
}
outColor = tonemap(hdrColor, exposure, gamma);
outColor = vec4(outColor.rgb * (1 - uiColor.a) + uiColor.rgb * uiColor.a, 1);
//outColor = vec4 (vec3 (depth/100.0), 1);
/*
outColor = vec4(SRGBtoLINEAR(tonemap(hdrColor.rgb)), hdrColor.a);;*/
/* vec3 mapped = vec3(1.0) - exp(-hdrColor.rgb * pc.exposure);
mapped = pow(mapped, vec3(1.0 / pc.gamma));
outColor = vec4(mapped, hdrColor.a);*/
}
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