--- /dev/null
+#ifndef MSP_GL_PIXELFORMAT_BACKEND_H_
+#define MSP_GL_PIXELFORMAT_BACKEND_H_
+
+#ifndef MSP_GL_PIXELFORMAT_H_
+#error "pixelformat_backend.h requires pixelformat.h"
+#endif
+
+namespace Msp {
+namespace GL {
+
+unsigned get_vulkan_pixelformat(PixelFormat);
+unsigned get_vulkan_aspect(PixelComponents);
+PixelFormat pixelformat_from_vulkan(unsigned);
+const unsigned *get_vulkan_swizzle(ComponentSwizzle);
+
+} // namespace GL
+} // namespace Msp
+
+#endif