+! Copyright (C) 2005, 2006 Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
+USING: alien alien.c-types alien.syntax parser namespaces kernel
+math math.bitfields windows.types windows.types init assocs
+sequences libc ;
+IN: windows.opengl32
+
+! PIXELFORMATDESCRIPTOR flags
+: PFD_DOUBLEBUFFER HEX: 00000001 ; inline
+: PFD_STEREO HEX: 00000002 ; inline
+: PFD_DRAW_TO_WINDOW HEX: 00000004 ; inline
+: PFD_DRAW_TO_BITMAP HEX: 00000008 ; inline
+: PFD_SUPPORT_GDI HEX: 00000010 ; inline
+: PFD_SUPPORT_OPENGL HEX: 00000020 ; inline
+: PFD_GENERIC_FORMAT HEX: 00000040 ; inline
+: PFD_NEED_PALETTE HEX: 00000080 ; inline
+: PFD_NEED_SYSTEM_PALETTE HEX: 00000100 ; inline
+: PFD_SWAP_EXCHANGE HEX: 00000200 ; inline
+: PFD_SWAP_COPY HEX: 00000400 ; inline
+: PFD_SWAP_LAYER_BUFFERS HEX: 00000800 ; inline
+: PFD_GENERIC_ACCELERATED HEX: 00001000 ; inline
+: PFD_SUPPORT_DIRECTDRAW HEX: 00002000 ; inline
+
+! PIXELFORMATDESCRIPTOR flags for use in ChoosePixelFormat only
+: PFD_DEPTH_DONTCARE HEX: 20000000 ; inline
+: PFD_DOUBLEBUFFER_DONTCARE HEX: 40000000 ; inline
+: PFD_STEREO_DONTCARE HEX: 80000000 ; inline
+
+! pixel types
+: PFD_TYPE_RGBA 0 ; inline
+: PFD_TYPE_COLORINDEX 1 ; inline
+
+! layer types
+: PFD_MAIN_PLANE 0 ; inline
+: PFD_OVERLAY_PLANE 1 ; inline
+: PFD_UNDERLAY_PLANE -1 ; inline
+
+: LPD_TYPE_RGBA 0 ; inline
+: LPD_TYPE_COLORINDEX 1 ; inline
+
+! wglSwapLayerBuffers flags
+: WGL_SWAP_MAIN_PLANE HEX: 00000001 ; inline
+: WGL_SWAP_OVERLAY1 HEX: 00000002 ; inline
+: WGL_SWAP_OVERLAY2 HEX: 00000004 ; inline
+: WGL_SWAP_OVERLAY3 HEX: 00000008 ; inline
+: WGL_SWAP_OVERLAY4 HEX: 00000010 ; inline
+: WGL_SWAP_OVERLAY5 HEX: 00000020 ; inline
+: WGL_SWAP_OVERLAY6 HEX: 00000040 ; inline
+: WGL_SWAP_OVERLAY7 HEX: 00000080 ; inline
+: WGL_SWAP_OVERLAY8 HEX: 00000100 ; inline
+: WGL_SWAP_OVERLAY9 HEX: 00000200 ; inline
+: WGL_SWAP_OVERLAY10 HEX: 00000400 ; inline
+: WGL_SWAP_OVERLAY11 HEX: 00000800 ; inline
+: WGL_SWAP_OVERLAY12 HEX: 00001000 ; inline
+: WGL_SWAP_OVERLAY13 HEX: 00002000 ; inline
+: WGL_SWAP_OVERLAY14 HEX: 00004000 ; inline
+: WGL_SWAP_OVERLAY15 HEX: 00008000 ; inline
+: WGL_SWAP_UNDERLAY1 HEX: 00010000 ; inline
+: WGL_SWAP_UNDERLAY2 HEX: 00020000 ; inline
+: WGL_SWAP_UNDERLAY3 HEX: 00040000 ; inline
+: WGL_SWAP_UNDERLAY4 HEX: 00080000 ; inline
+: WGL_SWAP_UNDERLAY5 HEX: 00100000 ; inline
+: WGL_SWAP_UNDERLAY6 HEX: 00200000 ; inline
+: WGL_SWAP_UNDERLAY7 HEX: 00400000 ; inline
+: WGL_SWAP_UNDERLAY8 HEX: 00800000 ; inline
+: WGL_SWAP_UNDERLAY9 HEX: 01000000 ; inline
+: WGL_SWAP_UNDERLAY10 HEX: 02000000 ; inline
+: WGL_SWAP_UNDERLAY11 HEX: 04000000 ; inline
+: WGL_SWAP_UNDERLAY12 HEX: 08000000 ; inline
+: WGL_SWAP_UNDERLAY13 HEX: 10000000 ; inline
+: WGL_SWAP_UNDERLAY14 HEX: 20000000 ; inline
+: WGL_SWAP_UNDERLAY15 HEX: 40000000 ; inline
+
+: pfd-dwFlags ( -- n )
+ { PFD_DRAW_TO_WINDOW PFD_SUPPORT_OPENGL PFD_DOUBLEBUFFER } flags ;
+
+! TODO: compare to http://www.nullterminator.net/opengl32.html
+: make-pfd ( bits -- pfd )
+ "PIXELFORMATDESCRIPTOR" <c-object>
+ "PIXELFORMATDESCRIPTOR" heap-size over set-PIXELFORMATDESCRIPTOR-nSize
+ 1 over set-PIXELFORMATDESCRIPTOR-nVersion
+ pfd-dwFlags over set-PIXELFORMATDESCRIPTOR-dwFlags
+ PFD_TYPE_RGBA over set-PIXELFORMATDESCRIPTOR-iPixelType
+ [ set-PIXELFORMATDESCRIPTOR-cColorBits ] keep
+ 16 over set-PIXELFORMATDESCRIPTOR-cDepthBits
+ PFD_MAIN_PLANE over set-PIXELFORMATDESCRIPTOR-dwLayerMask ;
+
+
+LIBRARY: gl
+
+
+! FUNCTION: int ReleaseDC ( HWND hWnd, HDC hDC ) ;
+! FUNCTION: HDC ResetDC ( HDC hdc, DEVMODE* lpInitData ) ;
+! FUNCTION: BOOL RestoreDC ( HDC hdc, int nSavedDC ) ;
+! FUNCTION: int SaveDC( HDC hDC ) ;
+! FUNCTION: HGDIOBJ SelectObject ( HDC hDC, HGDIOBJ hgdiobj ) ;
+
+FUNCTION: HGLRC wglCreateContext ( HDC hDC ) ;
+FUNCTION: BOOL wglDeleteContext ( HGLRC hRC ) ;
+FUNCTION: BOOL wglMakeCurrent ( HDC hDC, HGLRC hglrc ) ;
+FUNCTION: HGLRC wglGetCurrentContext ( ) ;
+FUNCTION: void* wglGetProcAddress ( char* name ) ;