vulkan: add an overlay layer

Just a starting point to display frame timings & drawcalls/submissions
per frame.

Signed-off-by: Lionel Landwerlin <[email protected]>
Acked-by: Jason Ekstrand <[email protected]>
+1-by: Mike Lothian <[email protected]>
+1-by: Tapani Pälli <[email protected]>
+1-by: Eric Engestrom <[email protected]>
+1-by: Yurii Kolesnykov <[email protected]>
+1-by: myfreeweb <[email protected]>
+1-by: Kenneth Graunke <[email protected]>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/vulkan/overlay-layer/overlay.vert b/src/vulkan/overlay-layer/overlay.vert
new file mode 100644
index 00000000000..20b29082780
--- /dev/null
+++ b/src/vulkan/overlay-layer/overlay.vert
@@ -0,0 +1,25 @@
+#version 450 core
+layout(location = 0) in vec2 aPos;
+layout(location = 1) in vec2 aUV;
+layout(location = 2) in vec4 aColor;
+
+layout(push_constant) uniform uPushConstant{
+    vec2 uScale;
+    vec2 uTranslate;
+} pc;
+
+out gl_PerVertex{
+    vec4 gl_Position;
+};
+
+layout(location = 0) out struct{
+    vec4 Color;
+    vec2 UV;
+} Out;
+
+void main()
+{
+    Out.Color = aColor;
+    Out.UV = aUV;
+    gl_Position = vec4(aPos*pc.uScale+pc.uTranslate, 0, 1);
+}