mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-11-15 06:53:59 +01:00
198 lines
6.4 KiB
Plaintext
198 lines
6.4 KiB
Plaintext
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// Date: 2024-10-24T08:46:47.5894476+07:00
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// begin import sh_sample.fsh.__shady_export
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#region /////////////// SAMPLING ///////////////
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const float PI = 3.14159265358979323846;
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float sinc ( float x ) { return x == 0.? 1. : sin(x * PI) / (x * PI); }
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vec4 texture2D_bicubic( sampler2D texture, vec2 uv ) {
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uv = uv * sampleDimension + 0.5;
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vec2 iuv = floor( uv );
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vec2 fuv = fract( uv );
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uv = iuv + fuv * fuv * (3.0 - 2.0 * fuv);
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uv = (uv - 0.5) / sampleDimension;
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return texture2D( texture, uv );
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}
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const int RSIN_RADIUS = 1;
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vec4 texture2D_rsin( sampler2D texture, vec2 uv ) {
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vec2 tx = 1.0 / sampleDimension;
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vec2 p = uv * sampleDimension;
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vec4 col = vec4(0.);
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float wei = 0.;
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for (int x = -RSIN_RADIUS; x <= RSIN_RADIUS; x++)
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for (int y = -RSIN_RADIUS; y <= RSIN_RADIUS; y++) {
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vec2 sx = vec2(float(x), float(y));
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float a = length(sx) / float(RSIN_RADIUS);
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vec4 sample = texture2D(texture, uv + sx * tx);
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float w = sinc(a * PI * tx.x) * sinc(a * PI * tx.y);
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col += w * sample;
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wei += w;
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}
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col /= wei;
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return col;
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}
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const int LANCZOS_RADIUS = 3;
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float lanczosWeight(float d, float n) { return d == 0.0 ? 1.0 : (d * d < n * n ? sinc(d) * sinc(d / n) : 0.0); }
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vec4 texture2D_lanczos3( sampler2D texture, vec2 uv ) {
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vec2 center = uv - (mod(uv * sampleDimension, 1.0) - 0.5) / sampleDimension;
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vec2 offset = (uv - center) * sampleDimension;
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vec2 tx = 1. / sampleDimension;
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vec4 col = vec4(0.);
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float wei = 0.;
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for(int x = -LANCZOS_RADIUS; x < LANCZOS_RADIUS; x++)
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for(int y = -LANCZOS_RADIUS; y < LANCZOS_RADIUS; y++) {
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float wx = lanczosWeight(float(x) - offset.x, float(LANCZOS_RADIUS));
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float wy = lanczosWeight(float(y) - offset.y, float(LANCZOS_RADIUS));
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float w = wx * wy;
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col += w * texture2D(texture, center + vec2(x, y) * tx);
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wei += w;
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}
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col /= wei;
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return col;
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}
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vec4 texture2Dintp( sampler2D texture, vec2 uv ) {
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if(interpolation <= 1) return texture2D( texture, uv );
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else if(interpolation == 2) return texture2D_bicubic( texture, uv );
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else if(interpolation == 3) return texture2D_lanczos3( texture, uv );
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return texture2D( texture, uv );
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}
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vec4 sampleTexture( sampler2D texture, vec2 pos) {
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if(pos.x >= 0. && pos.y >= 0. && pos.x <= 1. && pos.y <= 1.)
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return texture2Dintp(texture, pos);
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if(sampleMode == 0) return vec4(0.);
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else if(sampleMode == 1) return texture2Dintp(texture, clamp(pos, 0., 1.));
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else if(sampleMode == 2) return texture2Dintp(texture, fract(pos));
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else if(sampleMode == 3) return vec4(vec3(0.), 1.);
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return vec4(0.);
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}
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#endregion /////////////// SAMPLING ///////////////
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// end import sh_sample.fsh.__shady_export
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varying vec2 v_vTexcoord;
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varying vec4 v_vColour;
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uniform vec2 dimension;
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uniform vec2 center;
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uniform int sampleMode;
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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 strength;
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uniform int strengthUseSurf;
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uniform sampler2D strengthSurf;
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// #region /////////////// SAMPLING ///////////////
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// const float PI = 3.14159265358979323846;
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// uniform int interpolation;
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// uniform vec2 sampleDimension;
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// const int RSIN_RADIUS = 1;
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// float sinc ( float x ) { return x == 0.? 1. : sin(x * PI) / (x * PI); }
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// vec4 texture2D_bilinear( sampler2D texture, vec2 uv ) {
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// uv = uv * sampleDimension - .5;
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// vec2 iuv = floor( uv );
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// vec2 fuv = fract( uv );
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// vec4 mixed = mix(
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// mix(
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// texture2D( texture, (iuv + vec2(0., 0.)) / sampleDimension ),
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// texture2D( texture, (iuv + vec2(1., 0.)) / sampleDimension ),
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// fuv.x
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// ),
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// mix(
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// texture2D( texture, (iuv + vec2(0., 1.)) / sampleDimension ),
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// texture2D( texture, (iuv + vec2(1., 1.)) / sampleDimension ),
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// fuv.x
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// ),
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// fuv.y
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// );
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// mixed.rgb /= mixed.a;
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// return mixed;
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// }
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// vec4 texture2D_rsin( sampler2D texture, vec2 uv ) {
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// vec2 tx = 1.0 / sampleDimension;
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// vec2 p = uv * sampleDimension - vec2(0.5);
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// vec4 sum = vec4(0.0);
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// float weights = 0.;
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// for (int x = -RSIN_RADIUS; x <= RSIN_RADIUS; x++)
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// for (int y = -RSIN_RADIUS; y <= RSIN_RADIUS; y++) {
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// float a = length(vec2(float(x), float(y))) / float(RSIN_RADIUS);
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// if(a > 1.) continue;
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// float w = sinc(a * PI * tx.x) * sinc(a * PI * tx.y);
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// vec2 offset = vec2(float(x), float(y)) * tx;
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// vec4 sample = texture2D_bilinear(texture, (p + offset + vec2(0.5)) / sampleDimension);
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// sum += w * sample;
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// weights += w;
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// }
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// return sum / weights;
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// }
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// vec4 texture2D_bicubic( sampler2D texture, vec2 uv ) {
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// uv = uv * sampleDimension + 0.5;
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// vec2 iuv = floor( uv );
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// vec2 fuv = fract( uv );
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// uv = iuv + fuv * fuv * (3.0 - 2.0 * fuv);
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// uv = (uv - 0.5) / sampleDimension;
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// return texture2D_bilinear( texture, uv );
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// }
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// vec4 texture2Dintp( sampler2D texture, vec2 uv ) {
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// if(interpolation == 1) return texture2D_bilinear( texture, uv );
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// else if(interpolation == 2) return texture2D_bicubic( texture, uv );
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// else if(interpolation == 3) return texture2D_rsin( texture, uv );
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// return texture2D( texture, uv );
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// }
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// #endregion /////////////// SAMPLING ///////////////
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vec4 sampleTexture(vec2 pos) { #region
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if(pos.x >= 0. && pos.y >= 0. && pos.x <= 1. && pos.y <= 1.)
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return texture2Dintp(gm_BaseTexture, pos);
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if(sampleMode == 0)
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return vec4(0.);
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else if(sampleMode == 1)
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return texture2Dintp(gm_BaseTexture, clamp(pos, 0., 1.));
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else if(sampleMode == 2)
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return texture2Dintp(gm_BaseTexture, fract(pos));
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else if(sampleMode == 3)
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return vec4(vec3(0.), 1.);
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return vec4(0.);
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} #endregion
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void main() {
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float rad = radius.x;
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if(radiusUseSurf == 1) {
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vec4 _vMap = texture2Dintp( 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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float str = strength.x;
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if(strengthUseSurf == 1) {
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vec4 _vMap = texture2Dintp( strengthSurf, v_vTexcoord );
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str = mix(strength.x, strength.y, (_vMap.r + _vMap.g + _vMap.b) / 3.);
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}
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vec2 pixelPos = v_vTexcoord * dimension;
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vec2 to = pixelPos - center;
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float dis = distance(center, pixelPos);
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float eff = 1. - clamp(dis / rad, 0., 1.);
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float ang = atan(to.y, to.x) + eff * str;
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vec2 tex = center + vec2(cos(ang), sin(ang)) * distance(center, pixelPos);
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gl_FragColor = sampleTexture( tex / dimension );
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}
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