Vulcan Nightmare

Experimentally bringing up vulcan support

assets/shaders/minimap_display.vert.glsl

@@ -0,0 +1,16 @@
+#version 450
+
+layout(push_constant) uniform Push {
+    vec4 rect; // x, y, w, h in 0..1 screen space
+} push;
+
+layout(location = 0) in vec2 aPos;
+layout(location = 1) in vec2 aUV;
+
+layout(location = 0) out vec2 TexCoord;
+
+void main() {
+    TexCoord = aUV;
+    vec2 screenPos = push.rect.xy + aPos * push.rect.zw;
+    gl_Position = vec4(screenPos * 2.0 - 1.0, 0.0, 1.0);
+}