26 lines
557 B
GLSL
26 lines
557 B
GLSL
// VERTEX_SHADER:
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// glyphy.vs.glsl
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_OUT_ vec4 v_glyph;
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_OUT_ vec4 final_color;
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// Keep this in sync with glyph_encode in gskglrenderjob.c
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vec4
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glyph_vertex_transcode (vec2 v)
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{
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ivec2 g = ivec2 (v);
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ivec2 corner = ivec2 (mod (v, 2.));
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g /= 2;
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ivec2 nominal_size = ivec2 (mod (vec2(g), 64.));
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return vec4 (corner * nominal_size, g * 4);
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}
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void
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main()
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{
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v_glyph = glyph_vertex_transcode(aUv);
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vUv = v_glyph.zw;
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gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
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final_color = gsk_scaled_premultiply(aColor, u_alpha);
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}
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