81 lines
2.0 KiB
GLSL
81 lines
2.0 KiB
GLSL
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#version 450
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layout(location = 0) out vec4 fragColor;
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layout(location = 0) in vec2 inUV;
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layout(set = 1, binding = 0) uniform sampler2D inHdr;
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layout(set = 1, binding = 1) uniform sampler2D inBloom;
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layout( push_constant ) uniform constants
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{
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float exposure;
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float gamma;
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} PushConstants;
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const mat3x3 ACESInputMat =
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{
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{0.59719, 0.35458, 0.04823},
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{0.07600, 0.90834, 0.01566},
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{0.02840, 0.13383, 0.83777}
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};
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// ODT_SAT => XYZ => D60_2_D65 => sRGB
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const mat3x3 ACESOutputMat =
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{
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{ 1.60475, -0.53108, -0.07367},
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{-0.10208, 1.10813, -0.00605},
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{-0.00327, -0.07276, 1.07602}
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};
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vec3 RRTAndODTFit(vec3 v)
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{
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vec3 a = v * (v + 0.0245786f) - 0.000090537f;
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vec3 b = v * (0.983729f * v + 0.4329510f) + 0.238081f;
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return a / b;
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}
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vec3 ACESFitted(vec3 color)
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{
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color = transpose(ACESInputMat) * color;
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// Apply RRT and ODT
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color = RRTAndODTFit(color);
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color = transpose(ACESOutputMat) * color;
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// Clamp to [0, 1]
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color = clamp(color, vec3(0.0f), vec3(1.0f));
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return color;
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}
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vec4 upscale() {
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vec2 srcTexelSize = 1.0f / vec2(1200, 800) * 2.0f;
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float x = srcTexelSize.x;
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float y = srcTexelSize.y;
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vec3
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color = texture(inBloom, vec2(inUV.x + x, inUV.y + y)).rgb;
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color += texture(inBloom, vec2(inUV.x + x, inUV.y - y)).rgb;
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color += texture(inBloom, vec2(inUV.x - x, inUV.y + y)).rgb;
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color += texture(inBloom, vec2(inUV.x - x, inUV.y - y)).rgb;
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color += 2.0f * texture(inBloom, vec2(inUV.x + x, inUV.y)).rgb;
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color += 2.0f * texture(inBloom, vec2(inUV.x - x, inUV.y)).rgb;
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color += 2.0f * texture(inBloom, vec2(inUV.x, inUV.y + y)).rgb;
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color += 2.0f * texture(inBloom, vec2(inUV.x, inUV.y - y)).rgb;
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color += 4.0f * texture(inBloom, inUV).rgb;
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return vec4(color * (1.0f / 16.0f), 1.0f);
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}
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void main() {
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vec3 color = ACESFitted(texture(inHdr, inUV).rgb * PushConstants.exposure + upscale().rgb);
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color = pow(color.rgb, vec3(1.0/PushConstants.gamma));
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fragColor = vec4(color, 1.0);
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}
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