Merge pull request #16 from omnisci3nce/port-opengl-ral

Bring back OpenGL (part 1)

1 files changed, 33 insertions, 0 deletions

diff --git a/assets/shaders/triangle.metal b/assets/shaders/triangle.metal
new file mode 100644
index 0000000..6055705
--- /dev/null
+++ b/assets/shaders/triangle.metal
@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+struct VertexIn {
+  float2 position;
+  float3 color;
+};
+
+struct VertexOut {
+  float4 computedPosition [[position]];
+  float3 fragColor;
+};
+
+// Vertex shader
+vertex VertexOut basic_vertex(
+  const device VertexIn* vertex_array [[ buffer(0) ]],
+  unsigned int vid [[ vertex_id ]]
+  ) {
+  VertexIn v = vertex_array[vid];
+
+  VertexOut outVertex = VertexOut();
+  outVertex.computedPosition = float4(v.position.xy, 0.0, 1.0);
+  outVertex.fragColor = v.color;
+  return outVertex;
+}
+
+// Fragment shader
+fragment float4 basic_fragment(
+  VertexOut interpolated [[stage_in]]
+) { 
+  return float4(interpolated.fragColor, 1.0);
+}
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