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using weaker and faster fullscreen blurring; this is a style choice

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This commit is contained in:
minjaesong
2021-12-10 23:22:13 +09:00
parent 455f8ebf5f
commit df1b3dc680
4 changed files with 166 additions and 117 deletions
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31
assets/shaders/boxdown.frag Normal file
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#version 120
#ifdef GL_ES
precision mediump float;
#endif
varying vec4 v_color;
varying vec2 v_texCoords;
uniform sampler2D u_texture;
// recommended value: n / vec2(fbo_width, fbo_height) where n is something like {0.5, 1, 2, 4, ... }
// that, or simply 0.5, depending on how your uv coord works
uniform vec2 halfpixel = vec2(0.0, 0.0);
vec2 doublex = vec2(2.0, 0.0);
vec2 doubley = vec2(0.0, 2.0);
vec2 twister = vec2(1.0, -1.0);
vec2 boolean = vec2(1.0, 0.0);
void main() {
vec4 sum = texture2D(u_texture, v_texCoords) +
texture2D(u_texture, v_texCoords + halfpixel) +
texture2D(u_texture, v_texCoords - halfpixel) +
texture2D(u_texture, v_texCoords + halfpixel * twister) +
texture2D(u_texture, v_texCoords - halfpixel * twister) +
texture2D(u_texture, v_texCoords + halfpixel * boolean.xy) +
texture2D(u_texture, v_texCoords - halfpixel * boolean.xy) +
texture2D(u_texture, v_texCoords + halfpixel * boolean.yx) +
texture2D(u_texture, v_texCoords - halfpixel * boolean.yx) ;
gl_FragColor = sum / 9.0;
}

31
assets/shaders/boxup.frag Normal file
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@@ -0,0 +1,31 @@
#version 120
#ifdef GL_ES
precision mediump float;
#endif
varying vec4 v_color;
varying vec2 v_texCoords;
uniform sampler2D u_texture;
// recommended value: n / vec2(fbo_width, fbo_height) where n is something like {0.5, 1, 2, 4, ... }
// that, or simply 0.5, depending on how your uv coord works
uniform vec2 halfpixel = vec2(0.0, 0.0);
vec2 doublex = vec2(2.0, 0.0);
vec2 doubley = vec2(0.0, 2.0);
vec2 twister = vec2(1.0, -1.0);
vec2 boolean = vec2(1.0, 0.0);
void main() {
vec4 sum = texture2D(u_texture, v_texCoords) +
texture2D(u_texture, v_texCoords + halfpixel) +
texture2D(u_texture, v_texCoords - halfpixel) +
texture2D(u_texture, v_texCoords + halfpixel * twister) +
texture2D(u_texture, v_texCoords - halfpixel * twister) +
texture2D(u_texture, v_texCoords + halfpixel * boolean.xy) +
texture2D(u_texture, v_texCoords - halfpixel * boolean.xy) +
texture2D(u_texture, v_texCoords + halfpixel * boolean.yx) +
texture2D(u_texture, v_texCoords - halfpixel * boolean.yx) ;
gl_FragColor = sum / 9.0;
}