mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-12-27 07:26:33 +01:00
197 lines
6.4 KiB
Text
197 lines
6.4 KiB
Text
// Date: 2024-10-24T08:46:47.5894476+07:00
|
|
// begin import sh_sample.fsh.__shady_export
|
|
#region /////////////// SAMPLING ///////////////
|
|
const float PI = 3.14159265358979323846;
|
|
float sinc ( float x ) { return x == 0.? 1. : sin(x * PI) / (x * PI); }
|
|
vec4 texture2D_bicubic( sampler2D texture, vec2 uv ) {
|
|
uv = uv * sampleDimension + 0.5;
|
|
vec2 iuv = floor( uv );
|
|
vec2 fuv = fract( uv );
|
|
uv = iuv + fuv * fuv * (3.0 - 2.0 * fuv);
|
|
uv = (uv - 0.5) / sampleDimension;
|
|
return texture2D( texture, uv );
|
|
}
|
|
const int RSIN_RADIUS = 1;
|
|
vec4 texture2D_rsin( sampler2D texture, vec2 uv ) {
|
|
vec2 tx = 1.0 / sampleDimension;
|
|
vec2 p = uv * sampleDimension;
|
|
vec4 col = vec4(0.);
|
|
float wei = 0.;
|
|
for (int x = -RSIN_RADIUS; x <= RSIN_RADIUS; x++)
|
|
for (int y = -RSIN_RADIUS; y <= RSIN_RADIUS; y++) {
|
|
vec2 sx = vec2(float(x), float(y));
|
|
float a = length(sx) / float(RSIN_RADIUS);
|
|
vec4 sample = texture2D(texture, uv + sx * tx);
|
|
float w = sinc(a * PI * tx.x) * sinc(a * PI * tx.y);
|
|
col += w * sample;
|
|
wei += w;
|
|
}
|
|
col /= wei;
|
|
return col;
|
|
}
|
|
const int LANCZOS_RADIUS = 3;
|
|
float lanczosWeight(float d, float n) { return d == 0.0 ? 1.0 : (d * d < n * n ? sinc(d) * sinc(d / n) : 0.0); }
|
|
vec4 texture2D_lanczos3( sampler2D texture, vec2 uv ) {
|
|
vec2 center = uv - (mod(uv * sampleDimension, 1.0) - 0.5) / sampleDimension;
|
|
vec2 offset = (uv - center) * sampleDimension;
|
|
vec2 tx = 1. / sampleDimension;
|
|
vec4 col = vec4(0.);
|
|
float wei = 0.;
|
|
for(int x = -LANCZOS_RADIUS; x < LANCZOS_RADIUS; x++)
|
|
for(int y = -LANCZOS_RADIUS; y < LANCZOS_RADIUS; y++) {
|
|
float wx = lanczosWeight(float(x) - offset.x, float(LANCZOS_RADIUS));
|
|
float wy = lanczosWeight(float(y) - offset.y, float(LANCZOS_RADIUS));
|
|
float w = wx * wy;
|
|
col += w * texture2D(texture, center + vec2(x, y) * tx);
|
|
wei += w;
|
|
}
|
|
col /= wei;
|
|
return col;
|
|
}
|
|
vec4 texture2Dintp( sampler2D texture, vec2 uv ) {
|
|
if(interpolation <= 1) return texture2D( texture, uv );
|
|
else if(interpolation == 2) return texture2D_bicubic( texture, uv );
|
|
else if(interpolation == 3) return texture2D_lanczos3( texture, uv );
|
|
return texture2D( texture, uv );
|
|
}
|
|
vec4 sampleTexture( sampler2D texture, vec2 pos) {
|
|
if(pos.x >= 0. && pos.y >= 0. && pos.x <= 1. && pos.y <= 1.)
|
|
return texture2Dintp(texture, pos);
|
|
if(sampleMode == 0) return vec4(0.);
|
|
else if(sampleMode == 1) return texture2Dintp(texture, clamp(pos, 0., 1.));
|
|
else if(sampleMode == 2) return texture2Dintp(texture, fract(pos));
|
|
else if(sampleMode == 3) return vec4(vec3(0.), 1.);
|
|
return vec4(0.);
|
|
}
|
|
#endregion /////////////// SAMPLING ///////////////
|
|
// end import sh_sample.fsh.__shady_export
|
|
|
|
varying vec2 v_vTexcoord;
|
|
varying vec4 v_vColour;
|
|
|
|
uniform vec2 dimension;
|
|
uniform vec2 center;
|
|
uniform int sampleMode;
|
|
|
|
uniform vec2 radius;
|
|
uniform int radiusUseSurf;
|
|
uniform sampler2D radiusSurf;
|
|
|
|
uniform vec2 strength;
|
|
uniform int strengthUseSurf;
|
|
uniform sampler2D strengthSurf;
|
|
|
|
// #region /////////////// SAMPLING ///////////////
|
|
|
|
// const float PI = 3.14159265358979323846;
|
|
// uniform int interpolation;
|
|
// uniform vec2 sampleDimension;
|
|
|
|
// const int RSIN_RADIUS = 1;
|
|
|
|
// float sinc ( float x ) { return x == 0.? 1. : sin(x * PI) / (x * PI); }
|
|
|
|
// vec4 texture2D_bilinear( sampler2D texture, vec2 uv ) {
|
|
// uv = uv * sampleDimension - .5;
|
|
// vec2 iuv = floor( uv );
|
|
// vec2 fuv = fract( uv );
|
|
|
|
// vec4 mixed = mix(
|
|
// mix(
|
|
// texture2D( texture, (iuv + vec2(0., 0.)) / sampleDimension ),
|
|
// texture2D( texture, (iuv + vec2(1., 0.)) / sampleDimension ),
|
|
// fuv.x
|
|
// ),
|
|
// mix(
|
|
// texture2D( texture, (iuv + vec2(0., 1.)) / sampleDimension ),
|
|
// texture2D( texture, (iuv + vec2(1., 1.)) / sampleDimension ),
|
|
// fuv.x
|
|
// ),
|
|
// fuv.y
|
|
// );
|
|
|
|
// mixed.rgb /= mixed.a;
|
|
|
|
// return mixed;
|
|
// }
|
|
|
|
// vec4 texture2D_rsin( sampler2D texture, vec2 uv ) {
|
|
// vec2 tx = 1.0 / sampleDimension;
|
|
// vec2 p = uv * sampleDimension - vec2(0.5);
|
|
|
|
// vec4 sum = vec4(0.0);
|
|
// float weights = 0.;
|
|
|
|
// for (int x = -RSIN_RADIUS; x <= RSIN_RADIUS; x++)
|
|
// for (int y = -RSIN_RADIUS; y <= RSIN_RADIUS; y++) {
|
|
// float a = length(vec2(float(x), float(y))) / float(RSIN_RADIUS);
|
|
// if(a > 1.) continue;
|
|
// float w = sinc(a * PI * tx.x) * sinc(a * PI * tx.y);
|
|
// vec2 offset = vec2(float(x), float(y)) * tx;
|
|
// vec4 sample = texture2D_bilinear(texture, (p + offset + vec2(0.5)) / sampleDimension);
|
|
// sum += w * sample;
|
|
// weights += w;
|
|
// }
|
|
|
|
// return sum / weights;
|
|
// }
|
|
|
|
// vec4 texture2D_bicubic( sampler2D texture, vec2 uv ) {
|
|
// uv = uv * sampleDimension + 0.5;
|
|
// vec2 iuv = floor( uv );
|
|
// vec2 fuv = fract( uv );
|
|
// uv = iuv + fuv * fuv * (3.0 - 2.0 * fuv);
|
|
// uv = (uv - 0.5) / sampleDimension;
|
|
// return texture2D_bilinear( texture, uv );
|
|
// }
|
|
|
|
// vec4 texture2Dintp( sampler2D texture, vec2 uv ) {
|
|
// if(interpolation == 1) return texture2D_bilinear( texture, uv );
|
|
// else if(interpolation == 2) return texture2D_bicubic( texture, uv );
|
|
// else if(interpolation == 3) return texture2D_rsin( texture, uv );
|
|
// return texture2D( texture, uv );
|
|
// }
|
|
|
|
// #endregion /////////////// SAMPLING ///////////////
|
|
|
|
vec4 sampleTexture(vec2 pos) { #region
|
|
if(pos.x >= 0. && pos.y >= 0. && pos.x <= 1. && pos.y <= 1.)
|
|
return texture2Dintp(gm_BaseTexture, pos);
|
|
|
|
if(sampleMode == 0)
|
|
return vec4(0.);
|
|
|
|
else if(sampleMode == 1)
|
|
return texture2Dintp(gm_BaseTexture, clamp(pos, 0., 1.));
|
|
|
|
else if(sampleMode == 2)
|
|
return texture2Dintp(gm_BaseTexture, fract(pos));
|
|
|
|
else if(sampleMode == 3)
|
|
return vec4(vec3(0.), 1.);
|
|
|
|
return vec4(0.);
|
|
} #endregion
|
|
|
|
void main() {
|
|
float rad = radius.x;
|
|
if(radiusUseSurf == 1) {
|
|
vec4 _vMap = texture2Dintp( radiusSurf, v_vTexcoord );
|
|
rad = mix(radius.x, radius.y, (_vMap.r + _vMap.g + _vMap.b) / 3.);
|
|
}
|
|
|
|
float str = strength.x;
|
|
if(strengthUseSurf == 1) {
|
|
vec4 _vMap = texture2Dintp( strengthSurf, v_vTexcoord );
|
|
str = mix(strength.x, strength.y, (_vMap.r + _vMap.g + _vMap.b) / 3.);
|
|
}
|
|
|
|
vec2 pixelPos = v_vTexcoord * dimension;
|
|
vec2 to = pixelPos - center;
|
|
float dis = distance(center, pixelPos);
|
|
float eff = 1. - clamp(dis / rad, 0., 1.);
|
|
float ang = atan(to.y, to.x) + eff * str;
|
|
|
|
vec2 tex = center + vec2(cos(ang), sin(ang)) * distance(center, pixelPos);
|
|
gl_FragColor = sampleTexture( tex / dimension );
|
|
}
|