src/video/SDL_sysvideo.h
author Sam Lantinga <slouken@libsdl.org>
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It's now possible to build SDL without any C runtime at all on Windows, using Visual C++ 2005
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#ifndef _SDL_sysvideo_h
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#define _SDL_sysvideo_h
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#include "SDL_mouse.h"
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#define SDL_PROTOTYPES_ONLY
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#include "SDL_syswm.h"
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#undef SDL_PROTOTYPES_ONLY
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/* This file prototypes the video driver implementation.
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   This is designed to be easily converted to C++ in the future.
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 */
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/* OpenGL is pretty much available on all Windows systems */
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#ifdef WIN32
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#ifndef _WIN32_WCE
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#define HAVE_OPENGL
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#endif
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#include "SDL_windows.h"
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#endif
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#ifdef HAVE_OPENGL
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#ifdef MACOSX
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#include <OpenGL/gl.h>  /* OpenGL.framework */
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#else
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#include <GL/gl.h>
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#endif /* MACOSX */
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#endif /* HAVE_OPENGL */
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/* The SDL video driver */
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typedef struct SDL_VideoDevice SDL_VideoDevice;
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/* Define the SDL video driver structure */
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#define _THIS	SDL_VideoDevice *_this
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#ifndef _STATUS
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#define _STATUS	SDL_status *status
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#endif
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struct SDL_VideoDevice {
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	/* * * */
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	/* The name of this video driver */
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	const char *name;
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	/* * * */
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	/* Initialization/Query functions */
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	/* Initialize the native video subsystem, filling 'vformat' with the 
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	   "best" display pixel format, returning 0 or -1 if there's an error.
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	 */
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	int (*VideoInit)(_THIS, SDL_PixelFormat *vformat);
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	/* List the available video modes for the given pixel format, sorted
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	   from largest to smallest.
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	 */
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	SDL_Rect **(*ListModes)(_THIS, SDL_PixelFormat *format, Uint32 flags);
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	/* Set the requested video mode, returning a surface which will be
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	   set to the SDL_VideoSurface.  The width and height will already
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	   be verified by ListModes(), and the video subsystem is free to
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	   set the mode to a supported bit depth different from the one
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	   specified -- the desired bpp will be emulated with a shadow
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	   surface if necessary.  If a new mode is returned, this function
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	   should take care of cleaning up the current mode.
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	 */
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	SDL_Surface *(*SetVideoMode)(_THIS, SDL_Surface *current,
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				int width, int height, int bpp, Uint32 flags);
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	/* Toggle the fullscreen mode */
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	int (*ToggleFullScreen)(_THIS, int on);
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	/* This is called after the video mode has been set, to get the
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	   initial mouse state.  It should queue events as necessary to
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	   properly represent the current mouse focus and position.
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	 */
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	void (*UpdateMouse)(_THIS);
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	/* Create a YUV video surface (possibly overlay) of the given
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	   format.  The hardware should be able to perform at least 2x
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	   scaling on display.
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	 */
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	SDL_Overlay *(*CreateYUVOverlay)(_THIS, int width, int height,
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	                                 Uint32 format, SDL_Surface *display);
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        /* Sets the color entries { firstcolor .. (firstcolor+ncolors-1) }
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	   of the physical palette to those in 'colors'. If the device is
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	   using a software palette (SDL_HWPALETTE not set), then the
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	   changes are reflected in the logical palette of the screen
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	   as well.
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	   The return value is 1 if all entries could be set properly
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	   or 0 otherwise.
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	*/
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	int (*SetColors)(_THIS, int firstcolor, int ncolors,
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			 SDL_Color *colors);
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	/* This pointer should exist in the native video subsystem and should
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	   point to an appropriate update function for the current video mode
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	 */
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	void (*UpdateRects)(_THIS, int numrects, SDL_Rect *rects);
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	/* Reverse the effects VideoInit() -- called if VideoInit() fails
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	   or if the application is shutting down the video subsystem.
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	*/
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	void (*VideoQuit)(_THIS);
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	/* * * */
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	/* Hardware acceleration functions */
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	/* Information about the video hardware */
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	SDL_VideoInfo info;
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	/* The pixel format used when SDL_CreateRGBSurface creates SDL_HWSURFACEs with alpha */
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	SDL_PixelFormat* displayformatalphapixel;
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	/* Allocates a surface in video memory */
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	int (*AllocHWSurface)(_THIS, SDL_Surface *surface);
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	/* Sets the hardware accelerated blit function, if any, based
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	   on the current flags of the surface (colorkey, alpha, etc.)
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	 */
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	int (*CheckHWBlit)(_THIS, SDL_Surface *src, SDL_Surface *dst);
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	/* Fills a surface rectangle with the given color */
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	int (*FillHWRect)(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color);
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	/* Sets video mem colorkey and accelerated blit function */
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	int (*SetHWColorKey)(_THIS, SDL_Surface *surface, Uint32 key);
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	/* Sets per surface hardware alpha value */
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	int (*SetHWAlpha)(_THIS, SDL_Surface *surface, Uint8 value);
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	/* Returns a readable/writable surface */
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	int (*LockHWSurface)(_THIS, SDL_Surface *surface);
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	void (*UnlockHWSurface)(_THIS, SDL_Surface *surface);
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	/* Performs hardware flipping */
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	int (*FlipHWSurface)(_THIS, SDL_Surface *surface);
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	/* Frees a previously allocated video surface */
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	void (*FreeHWSurface)(_THIS, SDL_Surface *surface);
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	/* * * */
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	/* Gamma support */
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	Uint16 *gamma;
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	/* Set the gamma correction directly (emulated with gamma ramps) */
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	int (*SetGamma)(_THIS, float red, float green, float blue);
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	/* Get the gamma correction directly (emulated with gamma ramps) */
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	int (*GetGamma)(_THIS, float *red, float *green, float *blue);
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	/* Set the gamma ramp */
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	int (*SetGammaRamp)(_THIS, Uint16 *ramp);
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	/* Get the gamma ramp */
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	int (*GetGammaRamp)(_THIS, Uint16 *ramp);
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	/* * * */
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	/* OpenGL support */
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	/* Sets the dll to use for OpenGL and loads it */
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	int (*GL_LoadLibrary)(_THIS, const char *path);
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	/* Retrieves the address of a function in the gl library */
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	void* (*GL_GetProcAddress)(_THIS, const char *proc);
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        /* Get attribute information from the windowing system. */
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        int (*GL_GetAttribute)(_THIS, SDL_GLattr attrib, int* value);
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        /* Make the context associated with this driver current */
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        int (*GL_MakeCurrent)(_THIS);
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	/* Swap the current buffers in double buffer mode. */
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	void (*GL_SwapBuffers)(_THIS);
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  	/* OpenGL functions for SDL_OPENGLBLIT */
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#ifdef HAVE_OPENGL
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#ifndef WIN32
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#define WINAPI
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#endif
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#define SDL_PROC(ret,func,params) ret (WINAPI *func) params;
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#include "SDL_glfuncs.h"
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#undef SDL_PROC
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	/* Texture id */
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	GLuint texture;
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#endif
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	int is_32bit;
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	/* * * */
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	/* Window manager functions */
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	/* Set the title and icon text */
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	void (*SetCaption)(_THIS, const char *title, const char *icon);
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	/* Set the window icon image */
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	void (*SetIcon)(_THIS, SDL_Surface *icon, Uint8 *mask);
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	/* Iconify the window.
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	   This function returns 1 if there is a window manager and the
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	   window was actually iconified, it returns 0 otherwise.
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	*/
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	int (*IconifyWindow)(_THIS);
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	/* Grab or ungrab keyboard and mouse input */
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	SDL_GrabMode (*GrabInput)(_THIS, SDL_GrabMode mode);
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	/* Get some platform dependent window information */
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	int (*GetWMInfo)(_THIS, SDL_SysWMinfo *info);
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	/* * * */
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	/* Cursor manager functions */
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	/* Free a window manager cursor
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	   This function can be NULL if CreateWMCursor is also NULL.
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	 */
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	void (*FreeWMCursor)(_THIS, WMcursor *cursor);
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	/* If not NULL, create a black/white window manager cursor */
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	WMcursor *(*CreateWMCursor)(_THIS,
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		Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y);
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	/* Show the specified cursor, or hide if cursor is NULL */
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	int (*ShowWMCursor)(_THIS, WMcursor *cursor);
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	/* Warp the window manager cursor to (x,y)
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	   If NULL, a mouse motion event is posted internally.
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	 */
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	void (*WarpWMCursor)(_THIS, Uint16 x, Uint16 y);
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	/* If not NULL, this is called when a mouse motion event occurs */
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	void (*MoveWMCursor)(_THIS, int x, int y);
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	/* Determine whether the mouse should be in relative mode or not.
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	   This function is called when the input grab state or cursor
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	   visibility state changes.
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	   If the cursor is not visible, and the input is grabbed, the
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	   driver can place the mouse in relative mode, which may result
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	   in higher accuracy sampling of the pointer motion.
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	*/
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	void (*CheckMouseMode)(_THIS);
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	/* * * */
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	/* Event manager functions */
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	/* Initialize keyboard mapping for this driver */
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	void (*InitOSKeymap)(_THIS);
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	/* Handle any queued OS events */
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	void (*PumpEvents)(_THIS);
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	/* * * */
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	/* Data common to all drivers */
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	SDL_Surface *screen;
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	SDL_Surface *shadow;
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	SDL_Surface *visible;
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        SDL_Palette *physpal;	/* physical palette, if != logical palette */
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        SDL_Color *gammacols;	/* gamma-corrected colours, or NULL */
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	char *wm_title;
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	char *wm_icon;
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	int offset_x;
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	int offset_y;
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	SDL_GrabMode input_grab;
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	/* Driver information flags */
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	int handles_any_size;	/* Driver handles any size video mode */
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	/* * * */
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	/* Data used by the GL drivers */
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	struct {
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		int red_size;
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		int green_size;
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		int blue_size;
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		int alpha_size;
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		int depth_size;
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		int buffer_size;
0
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		int stencil_size;
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		int double_buffer;
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		int accum_red_size;
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		int accum_green_size;
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		int accum_blue_size;
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		int accum_alpha_size;
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		int stereo;
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		int multisamplebuffers;
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		int multisamplesamples;
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		int driver_loaded;
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		char driver_path[256];
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		void* dll_handle;
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	} gl_config;
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	/* * * */
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	/* Data private to this driver */
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	struct SDL_PrivateVideoData *hidden;
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	struct SDL_PrivateGLData *gl_data;
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	/* * * */
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	/* The function used to dispose of this structure */
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	void (*free)(_THIS);
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};
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#undef _THIS
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typedef struct VideoBootStrap {
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	const char *name;
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	const char *desc;
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	int (*available)(void);
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	SDL_VideoDevice *(*create)(int devindex);
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} VideoBootStrap;
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#ifdef ENABLE_X11
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extern VideoBootStrap X11_bootstrap;
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#endif
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#ifdef ENABLE_DGA
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extern VideoBootStrap DGA_bootstrap;
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#endif
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#ifdef ENABLE_NANOX
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extern VideoBootStrap NX_bootstrap;
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#endif
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#ifdef ENABLE_IPOD
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extern VideoBootStrap iPod_bootstrap;
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#endif
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#ifdef ENABLE_FBCON
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extern VideoBootStrap FBCON_bootstrap;
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#endif
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#ifdef ENABLE_DIRECTFB
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extern VideoBootStrap DirectFB_bootstrap;
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#endif
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#ifdef ENABLE_PS2GS
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extern VideoBootStrap PS2GS_bootstrap;
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#endif
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#ifdef ENABLE_GGI
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extern VideoBootStrap GGI_bootstrap;
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#endif
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#ifdef ENABLE_VGL
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extern VideoBootStrap VGL_bootstrap;
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#endif
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#ifdef ENABLE_SVGALIB
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extern VideoBootStrap SVGALIB_bootstrap;
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#endif
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#ifdef ENABLE_AALIB
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extern VideoBootStrap AALIB_bootstrap;
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#endif
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#ifdef ENABLE_GAPI
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extern VideoBootStrap GAPI_bootstrap;
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#endif
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#ifdef ENABLE_WINDIB
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extern VideoBootStrap WINDIB_bootstrap;
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#endif
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#ifdef ENABLE_DIRECTX
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extern VideoBootStrap DIRECTX_bootstrap;
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#endif
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#ifdef ENABLE_BWINDOW
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extern VideoBootStrap BWINDOW_bootstrap;
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#endif
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/* MacOS X gets the proper defines from configure */
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#if defined(macintosh) && !defined(MACOSX)
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#define ENABLE_TOOLBOX
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#if !TARGET_API_MAC_CARBON
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#define ENABLE_DRAWSPROCKET
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#endif
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#endif
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#ifdef ENABLE_TOOLBOX
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extern VideoBootStrap TOOLBOX_bootstrap;
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#endif
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#ifdef ENABLE_DRAWSPROCKET
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extern VideoBootStrap DSp_bootstrap;
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#endif
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#ifdef ENABLE_QUARTZ
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extern VideoBootStrap QZ_bootstrap;
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#endif
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#ifdef ENABLE_CYBERGRAPHICS
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extern VideoBootStrap CGX_bootstrap;
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#endif
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#ifdef ENABLE_PHOTON
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extern VideoBootStrap ph_bootstrap;
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#endif
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#ifdef ENABLE_EPOC
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extern VideoBootStrap EPOC_bootstrap;
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#endif
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#ifdef ENABLE_DUMMYVIDEO
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extern VideoBootStrap DUMMY_bootstrap;
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#endif
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#ifdef ENABLE_XBIOS
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extern VideoBootStrap XBIOS_bootstrap;
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#endif
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#ifdef ENABLE_GEM
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extern VideoBootStrap GEM_bootstrap;
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#endif
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#ifdef ENABLE_QTOPIA
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extern VideoBootStrap Qtopia_bootstrap;
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#endif
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#ifdef ENABLE_WSCONS
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extern VideoBootStrap WSCONS_bootstrap;
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#endif
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#ifdef ENABLE_PICOGUI
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extern VideoBootStrap PG_bootstrap;
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#endif
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dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
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#ifdef ENABLE_DC
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extern VideoBootStrap DC_bootstrap;
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#endif
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#ifdef ENABLE_RISCOS
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extern VideoBootStrap RISCOS_bootstrap;
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#endif
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#ifdef __OS2__
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extern VideoBootStrap OS2FSLib_bootstrap;
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#endif
0
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/* This is the current video device */
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extern SDL_VideoDevice *current_video;
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#define SDL_VideoSurface	(current_video->screen)
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#define SDL_ShadowSurface	(current_video->shadow)
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#define SDL_PublicSurface	(current_video->visible)
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#endif /* _SDL_sysvideo_h */