restore depth based world mouse position

shaders/gles_depthpointer.frag

@@ -0,0 +1,11 @@
+in vec2 f_coords;
+
+#texture (tex1, 0, R)
+uniform sampler2D tex1;
+
+layout(location = 0) out uvec4 out_color;
+
+void main()
+{
+	out_color = uvec4(uint(texture(tex1, f_coords).r * 65535.0), 0, 0, 0xFFFF);
+}