src/shaders/barchart.frag

0001 /*
0002  * SPDX-FileCopyrightText: 2021 Arjen Hiemstra <ahiemstra@heimr.nl>
0003  *
0004  * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
0005  */
0006
0007 #version 440
0008
0009 #extension GL_GOOGLE_include_directive: enable
0010 #include "sdf.glsl"
0011
0012 layout(std140, binding = 0) uniform buf {
0013     highp mat4 matrix;
0014     lowp float opacity;
0015     lowp vec2 aspect;
0016     lowp float radius;
0017     lowp vec4 backgroundColor;
0018 } ubuf;
0019
0020 layout (location = 0) in lowp vec2 uv;
0021 layout (location = 1) in mediump vec4 foregroundColor;
0022 layout (location = 2) in mediump float value;
0023
0024 layout (location = 0) out lowp vec4 out_color;
0025
0026 void main()
0027 {
0028     lowp vec4 color = vec4(0.0);
0029
0030     lowp float background = sdf_round(sdf_rectangle(uv, vec2(1.0, ubuf.aspect.y) - ubuf.radius), ubuf.radius);
0031
0032     color = sdf_render(background, color, ubuf.backgroundColor);
0033
0034     lowp float foreground = sdf_round(sdf_rectangle(vec2(uv.x, -ubuf.aspect.y + uv.y + value), vec2(1.0, value) - ubuf.radius), ubuf.radius);
0035
0036     color = sdf_render(foreground, color, foregroundColor);
0037
0038     out_color = color * ubuf.opacity;
0039 }