57 lines
1.3 KiB
GLSL
57 lines
1.3 KiB
GLSL
#version 440 core
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struct Vertex {
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vec2 position;
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vec2 tex_coord;
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};
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struct VertexOutput {
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vec4 position;
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vec2 tex_coord;
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};
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struct Glyph {
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vec2 atlas_position;
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vec2 size;
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vec2 target_position;
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float y_offset;
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float _haha_alignment;
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};
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layout(std430, binding = 0) readonly buffer VertexBlock {
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Vertex vertices[];
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};
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layout(std430, binding = 1) readonly buffer GlyphBlock {
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Glyph glyphs[];
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};
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layout(std430, binding = 2) readonly buffer ParamsBlock {
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vec2 screen_size;
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vec2 font_size;
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};
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vec4 to_device_position(vec2 position, vec2 size) {
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return vec4(((position / size) * 2.0) - vec2(1.0), 1.0, 1.0);
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}
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layout(location = 0) out VertexOutput out_vertex;
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void main() {
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Glyph glyph = glyphs[gl_InstanceID];
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vec2 scaled_size = ((vertices[gl_VertexID].position + 1.0) / 2.0) * (glyph.size/2.0);
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vec2 scaled_size_2 = ((vertices[gl_VertexID].position + 1.0) / 2.0) * (glyph.size);
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vec2 glyph_pos = scaled_size + glyph.target_position + vec2(0, glyph.y_offset/2.0+font_size.y);
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vec4 device_position = to_device_position(glyph_pos, screen_size);
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vec2 atlas_position = (scaled_size_2 + glyph.atlas_position) / 512.0;
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device_position.y = -device_position.y;
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out_vertex.position = device_position;
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out_vertex.tex_coord = atlas_position;
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gl_Position = device_position;
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}
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