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92 lines
2.9 KiB
92 lines
2.9 KiB
#extension GL_OES_EGL_image_external : require
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precision highp float;
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varying highp vec2 textureCoordinate;
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uniform samplerExternalOES inputImageTexture;
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uniform sampler2D curve;
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vec3 rgb2hsv(vec3 c)
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{
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vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
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vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
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vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
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float d = q.x - min(q.w, q.y);
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float e = 1.0e-10;
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return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
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}
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vec3 hsv2rgb(vec3 c) {
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vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
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vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
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return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
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}
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void main() {
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float GreyVal;
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lowp vec4 textureColor;
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lowp vec4 textureColorOri;
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float xCoordinate = textureCoordinate.x;
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float yCoordinate = textureCoordinate.y;
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highp float redCurveValue;
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highp float greenCurveValue;
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highp float blueCurveValue;
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textureColor = texture2D( inputImageTexture, vec2(xCoordinate, yCoordinate));
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// step1 curve
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redCurveValue = texture2D(curve, vec2(textureColor.r, 0.0)).r;
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greenCurveValue = texture2D(curve, vec2(textureColor.g, 0.0)).g;
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blueCurveValue = texture2D(curve, vec2(textureColor.b, 0.0)).b;
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//textureColor = vec4(redCurveValue, greenCurveValue, blueCurveValue, 1.0);
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vec3 tColor = vec3(redCurveValue, greenCurveValue, blueCurveValue);
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tColor = rgb2hsv(tColor);
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tColor.g = tColor.g * 1.2;
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float dStrength = 1.0;
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float dSatStrength = 0.3;
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float dGap = 0.0;
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if( tColor.r >= 0.0 && tColor.r < 0.417)
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{
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tColor.g = tColor.g + (tColor.g * dSatStrength);
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}
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else if( tColor.r > 0.958 && tColor.r <= 1.0)
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{
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tColor.g = tColor.g + (tColor.g * dSatStrength);
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}
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else if( tColor.r >= 0.875 && tColor.r <= 0.958)
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{
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dGap = abs(tColor.r - 0.875);
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dStrength = (dGap / 0.0833);
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tColor.g = tColor.g + (tColor.g * dSatStrength * dStrength);
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}
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else if( tColor.r >= 0.0417 && tColor.r <= 0.125)
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{
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dGap = abs(tColor.r - 0.125);
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dStrength = (dGap / 0.0833);
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tColor.g = tColor.g + (tColor.g * dSatStrength * dStrength);
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}
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tColor = hsv2rgb(tColor);
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tColor = clamp(tColor, 0.0, 1.0);
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redCurveValue = texture2D(curve, vec2(tColor.r, 1.0)).r;
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greenCurveValue = texture2D(curve, vec2(tColor.g, 1.0)).r;
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blueCurveValue = texture2D(curve, vec2(tColor.b, 1.0)).r;
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redCurveValue = texture2D(curve, vec2(redCurveValue, 1.0)).g;
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greenCurveValue = texture2D(curve, vec2(greenCurveValue, 1.0)).g;
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blueCurveValue = texture2D(curve, vec2(blueCurveValue, 1.0)).g;
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textureColor = vec4(redCurveValue, greenCurveValue, blueCurveValue, 1.0);
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gl_FragColor = vec4(textureColor.r, textureColor.g, textureColor.b, 1.0);
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} |