Add ktx

ktx/tests/loadtests/vkloadtests/shaders/cubemap/skybox.vert

@@ -0,0 +1,33 @@
+// Copyright 2017 Mark Callow
+// SPDX-License-Identifier: Apache-2.0
+
+#version 450
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+layout (location = 0) in vec3 inPos;
+
+layout (binding = 0) uniform UBO 
+{
+	mat4 projection;
+	mat4 modelView;
+    mat4 invModelView;
+    mat4 uvwTransform;
+} ubo;
+
+layout (location = 0) out vec3 outUVW;
+
+out gl_PerVertex 
+{
+	vec4 gl_Position;
+};
+
+void main() 
+{
+    //outUVW = inPos.xyz;
+	outUVW = (ubo.uvwTransform * vec4(inPos.xyz, 1.0)).xyz;
+    // Override the Z component with the W component to guarantee that the
+    // final Z value of the position will be 1.0.
+	gl_Position = (ubo.projection * ubo.modelView * vec4(inPos.xyz, 1.0)).xyww;
+}