Render views using quads with barrel distortion (instead of directly blitting result to swapchain)

data/shaders/multiview/viewdisplay.frag

@@ -0,0 +1,20 @@
+#version 450
+
+layout (binding = 1) uniform sampler2DArray samplerView;
+
+layout (location = 0) in vec2 inUV;
+layout (location = 0) out vec4 outColor;
+
+layout (constant_id = 0) const float VIEW_LAYER = 0.0f;
+
+void main() 
+{
+	const float alpha = 0.2;
+
+	vec2 p1 = vec2(2.0 * inUV - 1.0);
+	vec2 p2 = p1 / (1.0 - alpha * length(p1));
+	p2 = (p2 + 1.0) * 0.5;
+
+	bool inside = ((p2.x >= 0.0) && (p2.x <= 1.0) && (p2.y >= 0.0 ) && (p2.y <= 1.0));
+	outColor = inside ? texture(samplerView, vec3(p2, VIEW_LAYER)) : vec4(0.0);
+}

data/shaders/multiview/viewdisplay.vert

@@ -0,0 +1,14 @@
+#version 450
+
+layout (location = 0) out vec2 outUV;
+
+out gl_PerVertex
+{
+	vec4 gl_Position;
+};
+
+void main() 
+{
+	outUV = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
+	gl_Position = vec4(outUV * 2.0f - 1.0f, 0.0f, 1.0f);
+}