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https://git.code.sf.net/p/quake/quakeforge
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32 lines
955 B
GLSL
32 lines
955 B
GLSL
#version 450
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#extension GL_GOOGLE_include_directive : enable
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layout (set = 0, binding = 0) uniform
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#include "matrices.h"
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;
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layout (set = 1, binding = 0) uniform textureBuffer glyph_data;
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// per instance data
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layout (location = 0) in uint glyph_index;
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layout (location = 1) in vec4 glyph_color;
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layout (location = 2) in vec2 glyph_position;
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layout (location = 3) in vec2 glyph_offset; // for 9-slice
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// rg -> offset x,y
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// ba -> texture u,v
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layout (location = 0) out vec2 uv;
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layout (location = 1) out vec4 color;
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void
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main (void)
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{
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vec2 offset = vec2 ((gl_VertexIndex & 4) >> 2, (gl_VertexIndex & 8) >> 3);
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vec4 glyph = texelFetch (glyph_data, int(glyph_index) * 4 + gl_VertexIndex);
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// offset stored in glyph components 0 and 1
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vec2 position = glyph_position + glyph.xy + offset * glyph_offset;
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gl_Position = Projection2d * vec4 (position.xy, 0.0, 1.0);
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// texture uv stored in glyph components 2 and 3
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uv = glyph.pq;
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color = glyph_color;
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}
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