34 lines
980 B
Plaintext
34 lines
980 B
Plaintext
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#version 330 core
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#ifdef GL_ES
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#define LOWP lowp
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precision mediump float;
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#else
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#define LOWP
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#endif
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varying LOWP vec4 vColor;
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varying vec2 vTexCoord;
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uniform int horizontal;
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uniform sampler2D u_texture;
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uniform float weight[5] = float[] (0.227027, 0.1945946, 0.1216216, 0.054054, 0.016216);
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void main() {
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vec2 tex_offset = 1.0 /textureSize(u_texture, 0);
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vec3 result = texture(u_texture, vTexCoord).rgb * weight[0];
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if (horizontal == 1) {
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for (int i = 1; i < 5; ++i) {
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result += texture(u_texture, vTexCoord + vec2(tex_offset.x *i, 0.0)).rgb * weight[i];
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result += texture(u_texture, vTexCoord - vec2(tex_offset.x *i, 0.0)).rgb * weight[i];
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}
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} else {
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for (int i = 1; i < 5; ++i) {
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result += texture(u_texture, vTexCoord + vec2(0.0, tex_offset.y * i)).rgb * weight[i];
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result += texture(u_texture, vTexCoord - vec2(0.0, tex_offset.y * i)).rgb * weight[i];
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}
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}
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gl_FragColor = vec4(result, 1.0);
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}
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