Basic crashing text rendering

res/shaders/TextPass.slang

@@ -0,0 +1,69 @@
+
+struct GlyphData
+{
+    float2 bearing;
+    float2 size;
+};
+struct ViewData
+{
+    float4x4 projectionMatrix;
+}
+layout(set = 0, binding = 0)
+ConstantBuffer<ViewData> viewData;
+layout(set = 0, binding = 1)
+SamplerState glyphSampler;
+layout(set = 0, binding = 2)
+StructuredBuffer<GlyphData> glyphData;
+layout(set = 1)
+Texture2D glyphTextures[];
+layout(push_constant)
+float scale;
+
+struct VertexStageInput
+{
+    uint glyphIndex;
+    float2 position;
+    uint vertexId : SV_VertexID;
+};
+
+struct VertexStageOutput
+{
+    float4 position : SV_Position;
+    float2 uvCoords : TEXCOORD;
+    uint glyphIndex : GLYPHINDEX;
+};
+
+[shader("vertex")]
+VertexStageOutput vertexMain(VertexStageInput input)
+{
+    GlyphData glyph = glyphData[input.glyphIndex];
+    
+    float xpos = input.position.x + glyph.bearing.x * scale;
+    float ypos = input.position.y - (glyph.size.y - glyph.bearing.y) * scale;
+    
+    float w = glyph.size.x * scale;
+    float h = glyph.size.y * scale;
+    
+    float4 coordinates[4] = {
+        float4(xpos,     ypos + h, 0, 0),
+        float4(xpos,     ypos,     0, 1),
+        float4(xpos + w, ypos,     1, 0),
+        float4(xpos + w, ypos + h, 1, 1)
+    };
+    float4 vertex = coordinates[input.vertexId];
+    VertexStageOutput output;
+    output.uvCoords = vertex.zw;
+    output.position = mul(viewData.projectionMatrix, float4(vertex.xy, 0, 1));
+    output.glyphIndex = input.glyphIndex;
+    return output;
+}
+
+[shader("fragment")]
+float4 fragmentMain(
+    float4 position : SV_Position,
+    float2 uvCoords : TEXCOORD,
+    uint glyphIndex : GLYPHINDEX
+) : SV_Target
+{
+    return glyphTextures[glyphIndex].Sample(glyphSampler, uvCoords);
+}