mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-11-15 06:53:59 +01:00
126 lines
3.2 KiB
GLSL
126 lines
3.2 KiB
GLSL
varying vec2 v_vTexcoord;
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varying vec4 v_vColour;
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uniform float colors;
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uniform int alpha;
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uniform vec3 cMin, cMax;
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uniform vec2 gamma;
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uniform int gammaUseSurf;
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uniform sampler2D gammaSurf;
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#region =========================================== COLORS SPACES ===========================================
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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 hue2rgb( in float m1, in float m2, in float hue) { #region
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if (hue < 0.0)
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hue += 1.0;
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else if (hue > 1.0)
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hue -= 1.0;
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if ((6.0 * hue) < 1.0)
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return m1 + (m2 - m1) * hue * 6.0;
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else if ((2.0 * hue) < 1.0)
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return m2;
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else if ((3.0 * hue) < 2.0)
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return m1 + (m2 - m1) * ((2.0 / 3.0) - hue) * 6.0;
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else
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return m1;
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} #endregion
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vec3 hsl2rgb( in vec3 hsl ) { #region
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float r, g, b;
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if(hsl.y == 0.) {
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r = hsl.z;
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g = hsl.z;
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b = hsl.z;
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} else {
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float m1, m2;
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if(hsl.z <= 0.5)
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m2 = hsl.z * (1. + hsl.y);
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else
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m2 = hsl.z + hsl.y - hsl.z * hsl.y;
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m1 = 2. * hsl.z - m2;
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r = hue2rgb(m1, m2, hsl.x + 1. / 3.);
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g = hue2rgb(m1, m2, hsl.x);
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b = hue2rgb(m1, m2, hsl.x - 1. / 3.);
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}
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return vec3( r, g, b );
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} #endregion
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vec3 rgb2hsl( in vec3 c ) { #region
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float h = 0.0;
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float s = 0.0;
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float l = 0.0;
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float r = c.r;
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float g = c.g;
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float b = c.b;
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float cMin = min( r, min( g, b ) );
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float cMax = max( r, max( g, b ) );
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l = ( cMax + cMin ) / 2.0;
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if ( cMax > cMin ) {
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float cDelta = cMax - cMin;
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s = l < .5 ? cDelta / ( cMax + cMin ) : cDelta / ( 2.0 - ( cMax + cMin ) );
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if ( r == cMax )
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h = ( g - b ) / cDelta;
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else if ( g == cMax )
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h = 2.0 + ( b - r ) / cDelta;
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else
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h = 4.0 + ( r - g ) / cDelta;
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if ( h < 0.0)
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h += 6.0;
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h = h / 6.0;
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}
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return vec3( h, s, l );
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} #endregion
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#endregion =========================================== COLORS SPACES ===========================================
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float round(float a) { return fract(a) >= 0.5? ceil(a) : floor(a); }
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vec2 round(vec2 a) { return vec2(round(a.x), round(a.y)); }
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vec3 round(vec3 a) { return vec3(round(a.x), round(a.y), round(a.z)); }
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void main() {
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float gam = gamma.x;
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if(gammaUseSurf == 1) {
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vec4 _vMap = texture2D( gammaSurf, v_vTexcoord );
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gam = mix(gamma.x, gamma.y, (_vMap.r + _vMap.g + _vMap.b) / 3.);
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}
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gam = max(gam, .0001);
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vec3 cRan = cMax - cMin;
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vec4 _col = texture2D( gm_BaseTexture, v_vTexcoord );
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_col.rgb = clamp((_col.rgb - cMin) / cRan, 0., 1.);
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vec3 c = _col.rgb;
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c = pow(c, vec3(gam));
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c = floor(c * colors) / (colors - 1.);
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c = pow(c, vec3(1.0 / gam));
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_col = vec4(cMin + c * cRan, 1.);
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_col.a = alpha == 1? 1. : _col.a;
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gl_FragColor = _col;
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}
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