mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-12-26 15:06:22 +01:00
226 lines
6 KiB
GLSL
226 lines
6 KiB
GLSL
//
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// Simple passthrough fragment shader
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//
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varying vec2 v_vTexcoord;
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varying vec4 v_vColour;
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#define TAU 6.283185307179586
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uniform vec2 center;
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uniform vec2 dimension;
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uniform vec2 angle;
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uniform int angleUseSurf;
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uniform sampler2D angleSurf;
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uniform vec2 radius;
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uniform int radiusUseSurf;
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uniform sampler2D radiusSurf;
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uniform vec2 shift;
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uniform int shiftUseSurf;
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uniform sampler2D shiftSurf;
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uniform vec2 scale;
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uniform int scaleUseSurf;
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uniform sampler2D scaleSurf;
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uniform int type;
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uniform int gradient_loop;
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uniform int uniAsp;
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#region //////////////////////////////////// GRADIENT ////////////////////////////////////
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#define GRADIENT_LIMIT 128
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uniform int gradient_blend;
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uniform vec4 gradient_color[GRADIENT_LIMIT];
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uniform float gradient_time[GRADIENT_LIMIT];
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uniform int gradient_keys;
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uniform int gradient_use_map;
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uniform vec4 gradient_map_range;
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uniform sampler2D gradient_map;
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vec3 linearToGamma(vec3 c) { return pow(c, vec3( 2.2)); }
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vec3 gammaToLinear(vec3 c) { return pow(c, vec3(1. / 2.2)); }
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vec3 rgbMix(vec3 c1, vec3 c2, float t) { #region
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vec3 k1 = linearToGamma(c1);
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vec3 k2 = linearToGamma(c2);
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return gammaToLinear(mix(k1, k2, t));
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} #endregion
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vec3 rgb2oklab(vec3 c) { #region
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const mat3 kCONEtoLMS = mat3(
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0.4121656120, 0.2118591070, 0.0883097947,
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0.5362752080, 0.6807189584, 0.2818474174,
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0.0514575653, 0.1074065790, 0.6302613616);
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c = pow(c, vec3(2.2));
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c = pow( kCONEtoLMS * c, vec3(1.0 / 3.0) );
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return c;
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} #endregion
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vec3 oklab2rgb(vec3 c) { #region
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const mat3 kLMStoCONE = mat3(
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4.0767245293, -1.2681437731, -0.0041119885,
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-3.3072168827, 2.6093323231, -0.7034763098,
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0.2307590544, -0.3411344290, 1.7068625689);
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c = kLMStoCONE * (c * c * c);
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c = pow(c, vec3(1. / 2.2));
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return c;
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} #endregion
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vec3 oklabMax(vec3 c1, vec3 c2, float t) { #region
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vec3 k1 = rgb2oklab(c1);
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vec3 k2 = rgb2oklab(c2);
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return oklab2rgb(mix(k1, k2, t));
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} #endregion
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vec3 rgb2hsv(vec3 c) { #region
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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 = 0.0000000001;
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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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} #endregion
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vec3 hsv2rgb(vec3 c) { #region
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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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} #endregion
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float hueDist(float a0, float a1, float t) { #region
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float da = fract(a1 - a0);
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float ds = fract(2. * da) - da;
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return a0 + ds * t;
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} #endregion
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vec3 hsvMix(vec3 c1, vec3 c2, float t) { #region
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vec3 h1 = rgb2hsv(c1);
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vec3 h2 = rgb2hsv(c2);
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vec3 h = vec3(0.);
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h.x = h.x + hueDist(h1.x, h2.x, t);
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h.y = mix(h1.y, h2.y, t);
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h.z = mix(h1.z, h2.z, t);
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return hsv2rgb(h);
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} #endregion
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vec4 gradientEval(in float prog) { #region
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if(gradient_use_map == 1) {
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vec2 samplePos = mix(gradient_map_range.xy, gradient_map_range.zw, prog);
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return texture2D( gradient_map, samplePos );
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}
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vec4 col = vec4(0.);
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for(int i = 0; i < GRADIENT_LIMIT; i++) {
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if(gradient_time[i] == prog) {
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col = gradient_color[i];
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break;
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} else if(gradient_time[i] > prog) {
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if(i == 0)
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col = gradient_color[i];
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else {
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float t = (prog - gradient_time[i - 1]) / (gradient_time[i] - gradient_time[i - 1]);
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vec3 c0 = gradient_color[i - 1].rgb;
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vec3 c1 = gradient_color[i].rgb;
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float a = mix(gradient_color[i - 1].a, gradient_color[i].a, t);
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if(gradient_blend == 0)
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col = vec4(mix(c0, c1, t), a);
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else if(gradient_blend == 1)
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col = gradient_color[i - 1];
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else if(gradient_blend == 2)
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col = vec4(hsvMix(c0, c1, t), a);
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else if(gradient_blend == 3)
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col = vec4(oklabMax(c0, c1, t), a);
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else if(gradient_blend == 4)
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col = vec4(rgbMix(c0, c1, t), a);
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}
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break;
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}
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if(i >= gradient_keys - 1) {
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col = gradient_color[gradient_keys - 1];
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break;
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}
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}
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return col;
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} #endregion
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#endregion //////////////////////////////////// GRADIENT ////////////////////////////////////
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void main() {
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#region params
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float ang = angle.x;
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if(angleUseSurf == 1) {
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vec4 _vMap = texture2D( angleSurf, v_vTexcoord );
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ang = mix(angle.x, angle.y, (_vMap.r + _vMap.g + _vMap.b) / 3.);
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}
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ang = radians(ang);
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float rad = radius.x;
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if(radiusUseSurf == 1) {
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vec4 _vMap = texture2D( radiusSurf, v_vTexcoord );
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rad = mix(radius.x, radius.y, (_vMap.r + _vMap.g + _vMap.b) / 3.);
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}
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rad *= sqrt(2.);
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float shf = shift.x;
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if(shiftUseSurf == 1) {
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vec4 _vMap = texture2D( shiftSurf, v_vTexcoord );
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shf = mix(shift.x, shift.y, (_vMap.r + _vMap.g + _vMap.b) / 3.);
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}
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float sca = scale.x;
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if(scaleUseSurf == 1) {
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vec4 _vMap = texture2D( scaleSurf, v_vTexcoord );
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sca = mix(scale.x, scale.y, (_vMap.r + _vMap.g + _vMap.b) / 3.);
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}
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#endregion
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vec2 asp = dimension / dimension.y;
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float prog = 0.;
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if(type == 0) {
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prog = .5 + (v_vTexcoord.x - center.x) * cos(ang) - (v_vTexcoord.y - center.y) * sin(ang);
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} else if(type == 1) {
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if(uniAsp == 0) prog = distance(v_vTexcoord, center) / rad;
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else prog = distance(v_vTexcoord * asp, center * asp) / rad;
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} else if(type == 2) {
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vec2 _p = v_vTexcoord - center;
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if(uniAsp == 1) _p *= asp;
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float _a = atan(_p.y, _p.x) + ang;
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prog = (_a - floor(_a / TAU) * TAU) / TAU;
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}
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prog = (prog + shf - 0.5) * sca + 0.5;
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if(gradient_loop == 1) {
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prog = fract(prog < 0.? 1. - abs(prog) : prog);
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} else if(gradient_loop == 2) {
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prog = mod(abs(prog), 2.);
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if(prog >= 1.) prog = 2. - prog;
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}
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vec4 col = gradientEval(prog);
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gl_FragColor = vec4(col.rgb, col.a * texture2D( gm_BaseTexture, v_vTexcoord ).a);
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}
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