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Copy pathImage Levels.json
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751 lines (751 loc) · 20.2 KB
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Copy pathImage Levels.json
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751 lines (751 loc) · 20.2 KB
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"#version 300 es\nprecision highp float;\n\n// Levels Adjustment\n// u_int0: channel (0=RGB, 1=R, 2=G, 3=B) default: 0\n// u_float0: input black (0-255) default: 0\n// u_float1: input white (0-255) default: 255\n// u_float2: gamma (0.01-9.99) default: 1.0\n// u_float3: output black (0-255) default: 0\n// u_float4: output white (0-255) default: 255\n\nuniform sampler2D u_image0;\nuniform int u_int0;\nuniform float u_float0;\nuniform float u_float1;\nuniform float u_float2;\nuniform float u_float3;\nuniform float u_float4;\n\nin vec2 v_texCoord;\nout vec4 fragColor;\n\nvec3 applyLevels(vec3 color, float inBlack, float inWhite, float gamma, float outBlack, float outWhite) {\n float inRange = max(inWhite - inBlack, 0.0001);\n vec3 result = clamp((color - inBlack) / inRange, 0.0, 1.0);\n result = pow(result, vec3(1.0 / gamma));\n result = mix(vec3(outBlack), vec3(outWhite), result);\n return result;\n}\n\nfloat applySingleChannel(float value, float inBlack, float inWhite, float gamma, float outBlack, float outWhite) {\n float inRange = max(inWhite - inBlack, 0.0001);\n float result = clamp((value - inBlack) / inRange, 0.0, 1.0);\n result = pow(result, 1.0 / gamma);\n result = mix(outBlack, outWhite, result);\n return result;\n}\n\nvoid main() {\n vec4 texColor = texture(u_image0, v_texCoord);\n vec3 color = texColor.rgb;\n \n float inBlack = u_float0 / 255.0;\n float inWhite = u_float1 / 255.0;\n float gamma = u_float2;\n float outBlack = u_float3 / 255.0;\n float outWhite = u_float4 / 255.0;\n \n vec3 result;\n \n if (u_int0 == 0) {\n result = applyLevels(color, inBlack, inWhite, gamma, outBlack, outWhite);\n }\n else if (u_int0 == 1) {\n result = color;\n result.r = applySingleChannel(color.r, inBlack, inWhite, gamma, outBlack, outWhite);\n }\n else if (u_int0 == 2) {\n result = color;\n result.g = applySingleChannel(color.g, inBlack, inWhite, gamma, outBlack, outWhite);\n }\n else if (u_int0 == 3) {\n result = color;\n result.b = applySingleChannel(color.b, inBlack, inWhite, gamma, outBlack, outWhite);\n }\n else {\n result = color;\n }\n \n fragColor = vec4(result, texColor.a);\n}",
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}
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