68 lines
1.5 KiB
GLSL
68 lines
1.5 KiB
GLSL
#version 450
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#extension GL_EXT_buffer_reference : require
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struct Symbol {
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int top;
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uint left;
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uint width;
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uint height;
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uint advance;
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};
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struct Character {
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vec3 pos;
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vec4 color;
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float size;
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uint code;
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};
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layout(buffer_reference, std430) readonly buffer SymbolList{
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Symbol symbols[];
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};
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layout(buffer_reference, std430) readonly buffer CharacterList{
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Character characters[];
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};
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layout(set = 0, binding = 0) uniform UIUniform {
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mat4 screen;
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} ubo;
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layout(set = 1, binding = 0) uniform Font {
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uint num_symbols;
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uint width;
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uint height;
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SymbolList symbol_list;
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} font;
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layout(buffer_reference, std430) readonly buffer Pointers {
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uint padding[4];
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CharacterList characters;
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};
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layout(std430, push_constant) uniform Push {
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Pointers pointers;
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} push;
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layout(location = 0) in vec2 inVertexPosition;
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layout(location = 0) out vec4 fragColor;
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layout(location = 1) out vec2 fragUV;
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layout(location = 2) out uint code;
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void main() {
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Character character = push.pointers.characters.characters[gl_InstanceIndex];
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Symbol symbol = font.symbol_list.symbols[character.code];
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float fragU = inVertexPosition.x * symbol.width/font.width;
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float fragV = inVertexPosition.y * symbol.height/font.height;
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float x = (inVertexPosition.x * symbol.width + symbol.left) * character.size / font.width;
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float y = (inVertexPosition.y * symbol.height - symbol.top) * character.size / font.height;
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fragUV = vec2(fragU, fragV);
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fragColor = character.color;
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gl_Position = ubo.screen * vec4(vec3(x, y, 0.0) + character.pos, 1.0);
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code = character.code;
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}
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