added basic graphics pipeline and shaders

1 files changed, 30 insertions, 0 deletions

diff --git a/src/shaders/shader.slang b/src/shaders/shader.slang
new file mode 100644
index 0000000..b5f7a54
--- /dev/null
+++ b/src/shaders/shader.slang
@@ -0,0 +1,30 @@
+static float2 positions[3] = float2[] (
+    float2( 0.0, -0.5),
+    float2( 0.5,  0.5),
+    float2(-0.5,  0.5),
+);
+
+static float3 colors[3] = float3[] (
+    float3(1.0, 0.0, 0.0),
+    float3(0.0, 1.0, 0.0),
+    float3(0.0, 0.0, 1.0),
+);
+
+struct VertexOutput {
+    float3 color;
+    float4 sv_position : SV_Position;
+};
+
+[shader("vertex")]
+VertexOutput vert_main(uint vid : SV_VertexID) {
+    VertexOutput output;
+    output.color = colors[vid];
+    output.sv_position = float4(positions[vid], 0.0, 1.0);
+    return output;
+}
+
+[shader("fragment")]
+float4 frag_main(VertexOutput vert) : SV_Target {
+    float3 color = vert.color;
+    return float4(color, 1.0);
+}