slang shader!

shaders/shader.slang

@@ -0,0 +1,48 @@
+struct VSInput {
+    float2 pos;
+    float2 scale;
+    float2 uv;
+    float4 color;
+    float alpha;
+    uint32_t textureID;
+};
+
+struct VSOutput {
+    float4 pos : SV_POSITION;
+    float2 uv;
+    float4 color;
+    float alpha;
+    uint32_t tex_id;
+};
+
+static const float2 square[6] = {
+    float2(-0.5, -0.5), // Top-left
+    float2(-0.5,  0.5), // Bottom-left
+    float2( 0.5, -0.5), // Top-right
+
+    float2( 0.5, -0.5), // Top-right
+    float2(-0.5,  0.5), // Bottom-left
+    float2( 0.5,  0.5)  // Bottom-right
+};
+
+[shader ("vertex")]
+VSOutput main(VSInput input, uint vertex_index : SV_VertexID) {
+    VSOutput output;
+
+    float2 vertex_pos = square[vertex_index];
+    float2 final_pos = (vertex_pos * input.scale) + input.pos;
+
+    output.pos = float4(final_pos, 0.0, 1.0);
+    output.uv = input.uv;
+    output.color = input.color;
+    output.alpha = input.alpha;
+    output.tex_id = input.textureID;
+
+    return output;
+}
+
+[shader("fragment")]
+float4 main(VSOutput input) {
+
+    return float4(input.color.rgb, input.alpha);
+}