91 lines
2.1 KiB
GLSL
Executable File
91 lines
2.1 KiB
GLSL
Executable File
#version 330 core
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in vec2 uvCoordinates;
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flat in int atlasPage;
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in vec2 paintUVCoordinates;
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flat in float paintGradientAngleCos;
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flat in float paintGradientAngleSin;
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flat in float[2] paintGradientEndsUnrotated;
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uniform sampler2DArray textureSampler;
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uniform int paintType;
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uniform vec4 paintColor;
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uniform int paintGradientStopCount;
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uniform vec4[16] paintGradientColors;
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uniform float[16] paintGradientPositions;
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uniform vec2[2] paintGradientEnds;
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uniform float pxScale;
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out vec4 out_Color;
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vec4 solidColor(void)
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{
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return paintColor;
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}
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vec4 gammaMix(vec4 lCol, vec4 rCol, float ratio)
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{
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float gamma = 2.2;
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float one_over_gamma = 1 / gamma;
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vec4 ilCol = vec4(pow(lCol.r, gamma), pow(lCol.g, gamma), pow(lCol.b, gamma), lCol.a);
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vec4 irCol = vec4(pow(rCol.r, gamma), pow(rCol.g, gamma), pow(rCol.b, gamma), rCol.a);
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vec4 fCol = mix(ilCol, irCol, ratio);
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return vec4(pow(fCol.r, one_over_gamma), pow(fCol.g, one_over_gamma), pow(fCol.b, one_over_gamma), fCol.a);
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}
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vec4 gradientColor(void)
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{
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float tStart = paintGradientEndsUnrotated[0];
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float gradientLength = paintGradientEndsUnrotated[1] - tStart;
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float t = paintUVCoordinates.x * paintGradientAngleCos - paintUVCoordinates.y * paintGradientAngleSin;
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float ti = paintGradientPositions[0] * gradientLength;
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float tni;
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vec4 col = paintGradientColors[0];
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for (int i = 0; i < paintGradientStopCount - 1; i++)
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{
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tni = paintGradientPositions[i + 1] * gradientLength;
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float mixValue = smoothstep(tStart + ti, tStart + tni, t);
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col = gammaMix(col, paintGradientColors[i + 1], mixValue);
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ti = tni;
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}
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return col;
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}
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void main(void)
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{
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vec3 texCoords = vec3(uvCoordinates, atlasPage);
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float threshold = 180.0 / 255.0 - 5.0 / pow(pxScale, 1.6); // Also help small text be readable
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float signedDist = texture(textureSampler, texCoords).r - threshold;
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vec4 col;
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switch (paintType)
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{
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case 0:
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col = solidColor();
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break;
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case 1:
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col = gradientColor();
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break;
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}
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col.a *= smoothstep(0, 2.4 / pxScale, signedDist);
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out_Color = col;
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} |