Implement MSAA for triangle pipeline in iced_wgpu

wgpu/src/shader/blit.frag

@@ -0,0 +1,12 @@
+#version 450
+
+layout(location = 0) in vec2 v_Uv;
+
+layout(set = 0, binding = 0) uniform sampler u_Sampler;
+layout(set = 1, binding = 0) uniform texture2D u_Texture;
+
+layout(location = 0) out vec4 o_Color;
+
+void main() {
+    o_Color = texture(sampler2D(u_Texture, u_Sampler), v_Uv);
+}

wgpu/src/shader/blit.vert

@@ -0,0 +1,26 @@
+#version 450
+
+layout(location = 0) out vec2 o_Uv;
+
+const vec2 positions[6] = vec2[6](
+    vec2(-1.0, -1.0),
+    vec2(-1.0, 1.0),
+    vec2(1.0, 1.0),
+    vec2(-1.0, -1.0),
+    vec2(1.0, -1.0),
+    vec2(1.0, 1.0)
+);
+
+const vec2 uvs[6] = vec2[6](
+    vec2(0.0, 0.0),
+    vec2(0.0, 1.0),
+    vec2(1.0, 1.0),
+    vec2(0.0, 0.0),
+    vec2(1.0, 0.0),
+    vec2(1.0, 1.0)
+);
+
+void main() {
+    o_Uv = uvs[gl_VertexIndex];
+    gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
+}

wgpu/src/shader/image.vert

@@ -1,24 +0,0 @@
-#version 450
-
-layout(location = 0) in vec2 v_Pos;
-layout(location = 1) in vec2 i_Pos;
-layout(location = 2) in vec2 i_Scale;
-
-layout (set = 0, binding = 0) uniform Globals {
-    mat4 u_Transform;
-};
-
-layout(location = 0) out vec2 o_Uv;
-
-void main() {
-    o_Uv = v_Pos;
-
-    mat4 i_Transform = mat4(
-        vec4(i_Scale.x, 0.0, 0.0, 0.0),
-        vec4(0.0, i_Scale.y, 0.0, 0.0),
-        vec4(0.0, 0.0, 1.0, 0.0),
-        vec4(i_Pos, 0.0, 1.0)
-    );
-
-    gl_Position = u_Transform * i_Transform * vec4(v_Pos, 0.0, 1.0);
-}