46 lines
1.2 KiB
GLSL
46 lines
1.2 KiB
GLSL
#version 440 core
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struct UiRectFragment {
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highp vec4 device_position;
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highp vec2 position;
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highp vec2 size;
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highp vec2 border_size;
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highp vec2 screen_size;
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highp vec2 tex_coord;
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highp vec4 color;
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};
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in UiRectFragment out_rect;
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layout(location = 0) out highp vec4 color;
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highp float rect_sdf(
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highp vec2 absolute_pixel_position,
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highp vec2 origin,
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highp vec2 size,
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highp float corner_radius
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) {
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highp vec2 half_size = size / 2.0;
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highp vec2 rect_center = origin + half_size;
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highp vec2 pixel_position = abs(absolute_pixel_position - rect_center);
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highp vec2 shrunk_corner_position = half_size - corner_radius;
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highp vec2 pixel_to_shrunk_corner = max(vec2(0), pixel_position - shrunk_corner_position);
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highp float distance_to_shrunk_corner = length(pixel_to_shrunk_corner);
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highp float distance = distance_to_shrunk_corner - corner_radius;
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return distance;
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}
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void main() {
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highp vec2 pixel_pos = out_rect.tex_coord.xy * out_rect.screen_size;
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highp float distance = rect_sdf(pixel_pos, out_rect.position, out_rect.size, out_rect.border_size.x);
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if (distance <= 0.0) {
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color = out_rect.color;
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} else {
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color = vec4(0);
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}
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}
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