62 lines
1.7 KiB
GLSL
62 lines
1.7 KiB
GLSL
#version 300 es
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precision mediump float;
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/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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in vec2 in_uv;
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uniform sampler2D in_texture;
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uniform vec2 in_resolution;
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uniform sampler2D u_image;
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uniform sampler2D u_topLabel;
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uniform sampler2D u_bottomLabel;
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uniform bool u_topLabelEnabled;
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uniform bool u_bottomLabelEnabled;
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uniform float u_paddingTop;
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uniform float u_paddingBottom;
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uniform float u_paddingLeft;
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uniform float u_paddingRight;
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uniform vec3 u_bg;
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out vec4 out_color;
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float remap(float value, float inputMin, float inputMax, float outputMin, float outputMax) {
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return outputMin + (outputMax - outputMin) * ((value - inputMin) / (inputMax - inputMin));
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}
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vec3 blendAlpha(vec3 bg, vec4 fg) {
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return fg.a * fg.rgb + (1.0 - fg.a) * bg;
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}
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void main() {
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vec4 bg = vec4(u_bg, 1.0);
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vec4 image_color = texture(u_image, vec2(
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remap(in_uv.x, u_paddingLeft, 1.0 - u_paddingRight, 0.0, 1.0),
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remap(in_uv.y, u_paddingTop, 1.0 - u_paddingBottom, 0.0, 1.0)
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));
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vec4 topLabel_color = u_topLabelEnabled ? texture(u_topLabel, vec2(
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in_uv.x,
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remap(in_uv.y, 0.0, u_paddingTop, 0.0, 1.0)
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)) : bg;
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vec4 bottomLabel_color = u_bottomLabelEnabled ? texture(u_bottomLabel, vec2(
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in_uv.x,
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remap(in_uv.y, 1.0 - u_paddingBottom, 1.0, 0.0, 1.0)
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)) : bg;
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if (in_uv.y < u_paddingTop) {
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out_color = vec4(blendAlpha(bg.rgb, topLabel_color), 1.0);
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} else if (in_uv.y > (1.0 - u_paddingBottom)) {
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out_color = vec4(blendAlpha(bg.rgb, bottomLabel_color), 1.0);
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} else {
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if (in_uv.y > u_paddingTop && in_uv.x > u_paddingLeft && in_uv.x < (1.0 - u_paddingRight)) {
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out_color = image_color;
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} else {
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out_color = bg;
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}
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}
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}
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