luboslenco
49 lines
906 B
Plaintext
49 lines
906 B
Plaintext
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#[set(everything)]
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const constants: {
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pos: float4; // xywh
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tex: float4; // xywh
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col: float4;
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};
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#[set(everything)]
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const sampler_linear: sampler;
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#[set(everything)]
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const tex: tex2d;
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struct vert_in {
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pos: float2;
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}
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struct vert_out {
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pos: float4;
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tex: float2;
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col: float4;
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}
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fun draw_text_vert(input: vert_in): vert_out {
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var output: vert_out;
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var cpos: float4 = constants.pos;
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var ctex: float4 = constants.tex;
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output.pos = float4(input.pos, 0.0, 1.0);
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output.pos.xy = output.pos.xy * cpos.zw + cpos.xy;
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output.pos.xy = output.pos.xy * 2.0 - 1.0;
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output.pos.y = -output.pos.y;
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output.tex = input.pos * ctex.zw + ctex.xy;
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output.col = constants.col;
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return output;
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}
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fun draw_text_frag(input: vert_out): float4 {
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return float4(input.col.rgb, sample(tex, sampler_linear, input.tex).r * input.col.a);
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}
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#[pipe]
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struct pipe {
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vertex = draw_text_vert;
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fragment = draw_text_frag;
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}
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