750b5ef67e
* Fix webgl 2 compatibility * Add LumaLaplacian, ACESTonemap, ReinhardTonemap, DirectionalHashBlur
79 lines
2.0 KiB
GLSL
79 lines
2.0 KiB
GLSL
// based on Hashed blur by David Hoskins.
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// License Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
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in vec2 v_texCoord0;
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layout(binding = 0) uniform sampler2D tex0;
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layout(binding = 1) uniform sampler2D tex1;
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#ifdef RADIUS_FROM_TEXTURE
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layout(binding = 2) uniform sampler2D tex2;
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#endif
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uniform vec2 textureSize0;
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uniform float radius;
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uniform float spread;
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uniform float time;
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uniform int samples;
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uniform float gain;
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out vec4 o_color;
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#define TAU 6.28318530718
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//-------------------------------------------------------------------------------------------
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#define HASHSCALE 443.8975
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vec2 hash22(vec2 p) {
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vec3 p3 = fract(vec3(p.xyx) * HASHSCALE);
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p3 += dot(p3, p3.yzx+19.19);
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return fract(vec2((p3.x + p3.y)*p3.z, (p3.x+p3.z)*p3.y));
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}
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vec2 sampleOffset(inout vec2 r, vec2 direction) {
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r = fract(r * vec2(33.3983, 43.4427));
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return (r.x+.001) * direction;
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}
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vec2 sampleCircle(inout vec2 r) {
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r = fract(r * vec2(33.3983, 43.4427));
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return sqrt(r.x+.001) * vec2(sin(r.y * TAU), cos(r.y * TAU))*.5; // <<=== circular sampling.
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}
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//-------------------------------------------------------------------------------------------
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vec4 blur(vec2 uv, float r) {
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float radius = r;
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#ifdef RADIUS_FROM_TEXTURE
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radius *= texture(tex2, uv).r;
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#endif
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vec2 direction = texture(tex1, uv).xy;
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vec2 line = vec2(spread) * (vec2(1.0) / textureSize0);
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vec2 circle = vec2(radius) * (vec2(1.0) / textureSize0);
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vec2 randomL = hash22(uv + vec2(time));
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vec2 randomC = hash22(uv + vec2(time));
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vec4 acc = vec4(0.0);
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for (int i = 0; i < samples; i++) {
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vec2 lineOffset = line * sampleOffset(randomL, direction);
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vec2 circleOffset = circle * sampleCircle(randomC);
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acc += textureLod(tex0, uv + circleOffset + lineOffset, 0 );
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}
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return acc / float(samples);
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}
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//-------------------------------------------------------------------------------------------
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void main() {
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vec2 uv = v_texCoord0;
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float radiusSqr = pow(radius, 2.0);
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vec4 result = blur(uv, radiusSqr);
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result.rgb *= gain;
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o_color = result;
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} |