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#version 300 es
precision mediump float;
/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
in vec2 in_uv;
uniform sampler2D in_texture;
uniform vec2 in_resolution;
uniform int u_amount;
uniform float u_shiftStrengths[128];
uniform float u_shiftOrigins[128];
uniform float u_shiftHeights[128];
uniform float u_channelShift;
out vec4 out_color;
void main() {
float v = 0.0;
for (int i = 0; i < u_amount; i++) {
if (in_uv.y > (u_shiftOrigins[i] - u_shiftHeights[i]) && in_uv.y < (u_shiftOrigins[i] + u_shiftHeights[i])) {
v += u_shiftStrengths[i];
}
}
float r = texture(in_texture, vec2(in_uv.x + (v * (1.0 + u_channelShift)), in_uv.y)).r;
float g = texture(in_texture, vec2(in_uv.x + v, in_uv.y)).g;
float b = texture(in_texture, vec2(in_uv.x + (v * (1.0 + (u_channelShift / 2.0))), in_uv.y)).b;
float a = texture(in_texture, vec2(in_uv.x + v, in_uv.y)).a;
out_color = vec4(r, g, b, a);
}
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