From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../rust/metal/examples/window/shaders.metal       | 97 ++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 third_party/rust/metal/examples/window/shaders.metal

(limited to 'third_party/rust/metal/examples/window/shaders.metal')

diff --git a/third_party/rust/metal/examples/window/shaders.metal b/third_party/rust/metal/examples/window/shaders.metal
new file mode 100644
index 0000000000..cc05f5d57e
--- /dev/null
+++ b/third_party/rust/metal/examples/window/shaders.metal
@@ -0,0 +1,97 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+typedef struct {
+	packed_float2 position;
+	packed_float3 color;
+} vertex_t;
+
+struct ColorInOut {
+    float4 position [[position]];
+    float4 color;
+};
+// vertex shader function
+vertex ColorInOut triangle_vertex(const device vertex_t* vertex_array [[ buffer(0) ]],
+                                   unsigned int vid [[ vertex_id ]])
+{
+    ColorInOut out;
+
+    auto device const &v = vertex_array[vid];
+    out.position = float4(v.position.x, v.position.y, 0.0, 1.0);
+    out.color = float4(v.color.x, v.color.y, v.color.z, 0.2);
+
+    return out;
+}
+
+// fragment shader function
+fragment float4 triangle_fragment(ColorInOut in [[stage_in]])
+{
+    return in.color;
+};
+
+
+struct Rect {
+    float x;
+    float y;
+    float w;
+    float h;
+};
+
+struct Color {
+    float r;
+    float g;
+    float b;
+    float a;
+};
+
+struct ClearRect {
+    Rect rect;
+    Color color;
+};
+
+float2 rect_vert(
+    Rect rect,
+    uint vid
+) {
+    float2 pos;
+
+    float left = rect.x;
+    float right = rect.x + rect.w;
+    float bottom = rect.y;
+    float top = rect.y + rect.h;
+
+    switch (vid) {
+    case 0:
+        pos = float2(right, top);
+        break;
+    case 1:
+        pos = float2(left, top);
+        break;
+    case 2:
+        pos = float2(right, bottom);
+        break;
+    case 3:
+        pos = float2(left, bottom);
+        break;
+    }
+    return pos;
+}
+
+vertex ColorInOut clear_rect_vertex(
+    const device ClearRect *clear_rect [[ buffer(0) ]],
+    unsigned int vid [[ vertex_id ]]
+) {
+    ColorInOut out;
+    float4 pos = float4(rect_vert(clear_rect->rect, vid), 0, 1);
+    auto col = clear_rect->color;
+
+    out.position = pos;
+    out.color = float4(col.r, col.g, col.b, col.a);
+    return out;
+}
+
+fragment float4 clear_rect_fragment(ColorInOut in [[stage_in]])
+{
+    return in.color;
+};
-- 
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