/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2011 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ /** * \file SDL_video.h * * Header file for SDL video functions. */ #ifndef _SDL_video_h #define _SDL_video_h #include "SDL_stdinc.h" #include "SDL_pixels.h" #include "SDL_rect.h" #include "SDL_surface.h" #include "begin_code.h" /* Set up for C function definitions, even when using C++ */ #ifdef __cplusplus /* *INDENT-OFF* */ extern "C" { /* *INDENT-ON* */ #endif /** * \brief The structure that defines a display mode * * \sa SDL_GetNumDisplayModes() * \sa SDL_GetDisplayMode() * \sa SDL_GetDesktopDisplayMode() * \sa SDL_GetCurrentDisplayMode() * \sa SDL_GetClosestDisplayMode() * \sa SDL_SetWindowDisplayMode() * \sa SDL_GetWindowDisplayMode() */ typedef struct { Uint32 format; /**< pixel format */ int w; /**< width */ int h; /**< height */ int refresh_rate; /**< refresh rate (or zero for unspecified) */ void *driverdata; /**< driver-specific data, initialize to 0 */ } SDL_DisplayMode; /** * \brief The type used to identify a window * * \sa SDL_CreateWindow() * \sa SDL_CreateWindowFrom() * \sa SDL_DestroyWindow() * \sa SDL_GetWindowData() * \sa SDL_GetWindowFlags() * \sa SDL_GetWindowGrab() * \sa SDL_GetWindowPosition() * \sa SDL_GetWindowSize() * \sa SDL_GetWindowTitle() * \sa SDL_HideWindow() * \sa SDL_MaximizeWindow() * \sa SDL_MinimizeWindow() * \sa SDL_RaiseWindow() * \sa SDL_RestoreWindow() * \sa SDL_SetWindowData() * \sa SDL_SetWindowFullscreen() * \sa SDL_SetWindowGrab() * \sa SDL_SetWindowIcon() * \sa SDL_SetWindowPosition() * \sa SDL_SetWindowSize() * \sa SDL_SetWindowTitle() * \sa SDL_ShowWindow() */ typedef struct SDL_Window SDL_Window; /** * \brief The flags on a window * * \sa SDL_GetWindowFlags() */ typedef enum { SDL_WINDOW_FULLSCREEN = 0x00000001, /**< fullscreen window */ SDL_WINDOW_OPENGL = 0x00000002, /**< window usable with OpenGL context */ SDL_WINDOW_SHOWN = 0x00000004, /**< window is visible */ SDL_WINDOW_HIDDEN = 0x00000008, /**< window is not visible */ SDL_WINDOW_BORDERLESS = 0x00000010, /**< no window decoration */ SDL_WINDOW_RESIZABLE = 0x00000020, /**< window can be resized */ SDL_WINDOW_MINIMIZED = 0x00000040, /**< window is minimized */ SDL_WINDOW_MAXIMIZED = 0x00000080, /**< window is maximized */ SDL_WINDOW_INPUT_GRABBED = 0x00000100, /**< window has grabbed input focus */ SDL_WINDOW_INPUT_FOCUS = 0x00000200, /**< window has input focus */ SDL_WINDOW_MOUSE_FOCUS = 0x00000400, /**< window has mouse focus */ SDL_WINDOW_FOREIGN = 0x00000800 /**< window not created by SDL */ } SDL_WindowFlags; /** * \brief Used to indicate that you don't care what the window position is. */ #define SDL_WINDOWPOS_UNDEFINED_MASK 0x1FFF0000 #define SDL_WINDOWPOS_UNDEFINED_DISPLAY(X) (SDL_WINDOWPOS_UNDEFINED_MASK|(X)) #define SDL_WINDOWPOS_UNDEFINED SDL_WINDOWPOS_UNDEFINED_DISPLAY(0) #define SDL_WINDOWPOS_ISUNDEFINED(X) \ (((X)&0xFFFF0000) == SDL_WINDOWPOS_UNDEFINED_MASK) /** * \brief Used to indicate that the window position should be centered. */ #define SDL_WINDOWPOS_CENTERED_MASK 0x2FFF0000 #define SDL_WINDOWPOS_CENTERED_DISPLAY(X) (SDL_WINDOWPOS_CENTERED_MASK|(X)) #define SDL_WINDOWPOS_CENTERED SDL_WINDOWPOS_CENTERED_DISPLAY(0) #define SDL_WINDOWPOS_ISCENTERED(X) \ (((X)&0xFFFF0000) == SDL_WINDOWPOS_CENTERED_MASK) /** * \brief Event subtype for window events */ typedef enum { SDL_WINDOWEVENT_NONE, /**< Never used */ SDL_WINDOWEVENT_SHOWN, /**< Window has been shown */ SDL_WINDOWEVENT_HIDDEN, /**< Window has been hidden */ SDL_WINDOWEVENT_EXPOSED, /**< Window has been exposed and should be redrawn */ SDL_WINDOWEVENT_MOVED, /**< Window has been moved to data1, data2 */ SDL_WINDOWEVENT_RESIZED, /**< Window has been resized to data1xdata2 */ SDL_WINDOWEVENT_SIZE_CHANGED, /**< The window size has changed, either as a result of an API call or through the system or user changing the window size. */ SDL_WINDOWEVENT_MINIMIZED, /**< Window has been minimized */ SDL_WINDOWEVENT_MAXIMIZED, /**< Window has been maximized */ SDL_WINDOWEVENT_RESTORED, /**< Window has been restored to normal size and position */ SDL_WINDOWEVENT_ENTER, /**< Window has gained mouse focus */ SDL_WINDOWEVENT_LEAVE, /**< Window has lost mouse focus */ SDL_WINDOWEVENT_FOCUS_GAINED, /**< Window has gained keyboard focus */ SDL_WINDOWEVENT_FOCUS_LOST, /**< Window has lost keyboard focus */ SDL_WINDOWEVENT_CLOSE /**< The window manager requests that the window be closed */ } SDL_WindowEventID; /** * \brief An opaque handle to an OpenGL context. */ typedef void *SDL_GLContext; /** * \brief OpenGL configuration attributes */ typedef enum { SDL_GL_RED_SIZE, SDL_GL_GREEN_SIZE, SDL_GL_BLUE_SIZE, SDL_GL_ALPHA_SIZE, SDL_GL_BUFFER_SIZE, SDL_GL_DOUBLEBUFFER, SDL_GL_DEPTH_SIZE, SDL_GL_STENCIL_SIZE, SDL_GL_ACCUM_RED_SIZE, SDL_GL_ACCUM_GREEN_SIZE, SDL_GL_ACCUM_BLUE_SIZE, SDL_GL_ACCUM_ALPHA_SIZE, SDL_GL_STEREO, SDL_GL_MULTISAMPLEBUFFERS, SDL_GL_MULTISAMPLESAMPLES, SDL_GL_ACCELERATED_VISUAL, SDL_GL_RETAINED_BACKING, SDL_GL_CONTEXT_MAJOR_VERSION, SDL_GL_CONTEXT_MINOR_VERSION } SDL_GLattr; /* Function prototypes */ /** * \brief Get the number of video drivers compiled into SDL * * \sa SDL_GetVideoDriver() */ extern DECLSPEC int SDLCALL SDL_GetNumVideoDrivers(void); /** * \brief Get the name of a built in video driver. * * \note The video drivers are presented in the order in which they are * normally checked during initialization. * * \sa SDL_GetNumVideoDrivers() */ extern DECLSPEC const char *SDLCALL SDL_GetVideoDriver(int index); /** * \brief Initialize the video subsystem, optionally specifying a video driver. * * \param driver_name Initialize a specific driver by name, or NULL for the * default video driver. * * \return 0 on success, -1 on error * * This function initializes the video subsystem; setting up a connection * to the window manager, etc, and determines the available display modes * and pixel formats, but does not initialize a window or graphics mode. * * \sa SDL_VideoQuit() */ extern DECLSPEC int SDLCALL SDL_VideoInit(const char *driver_name); /** * \brief Shuts down the video subsystem. * * This function closes all windows, and restores the original video mode. * * \sa SDL_VideoInit() */ extern DECLSPEC void SDLCALL SDL_VideoQuit(void); /** * \brief Returns the name of the currently initialized video driver. * * \return The name of the current video driver or NULL if no driver * has been initialized * * \sa SDL_GetNumVideoDrivers() * \sa SDL_GetVideoDriver() */ extern DECLSPEC const char *SDLCALL SDL_GetCurrentVideoDriver(void); /** * \brief Returns the number of available video displays. * * \sa SDL_GetDisplayBounds() */ extern DECLSPEC int SDLCALL SDL_GetNumVideoDisplays(void); /** * \brief Get the desktop area represented by a display, with the primary * display located at 0,0 * * \return 0 on success, or -1 if the index is out of range. * * \sa SDL_GetNumVideoDisplays() */ extern DECLSPEC int SDLCALL SDL_GetDisplayBounds(int displayIndex, SDL_Rect * rect); /** * \brief Returns the number of available display modes. * * \sa SDL_GetDisplayMode() */ extern DECLSPEC int SDLCALL SDL_GetNumDisplayModes(int displayIndex); /** * \brief Fill in information about a specific display mode. * * \note The display modes are sorted in this priority: * \li bits per pixel -> more colors to fewer colors * \li width -> largest to smallest * \li height -> largest to smallest * \li refresh rate -> highest to lowest * * \sa SDL_GetNumDisplayModes() */ extern DECLSPEC int SDLCALL SDL_GetDisplayMode(int displayIndex, int modeIndex, SDL_DisplayMode * mode); /** * \brief Fill in information about the desktop display mode. */ extern DECLSPEC int SDLCALL SDL_GetDesktopDisplayMode(int displayIndex, SDL_DisplayMode * mode); /** * \brief Fill in information about the current display mode. */ extern DECLSPEC int SDLCALL SDL_GetCurrentDisplayMode(int displayIndex, SDL_DisplayMode * mode); /** * \brief Get the closest match to the requested display mode. * * \param mode The desired display mode * \param closest A pointer to a display mode to be filled in with the closest * match of the available display modes. * * \return The passed in value \c closest, or NULL if no matching video mode * was available. * * The available display modes are scanned, and \c closest is filled in with the * closest mode matching the requested mode and returned. The mode format and * refresh_rate default to the desktop mode if they are 0. The modes are * scanned with size being first priority, format being second priority, and * finally checking the refresh_rate. If all the available modes are too * small, then NULL is returned. * * \sa SDL_GetNumDisplayModes() * \sa SDL_GetDisplayMode() */ extern DECLSPEC SDL_DisplayMode * SDLCALL SDL_GetClosestDisplayMode(int displayIndex, const SDL_DisplayMode * mode, SDL_DisplayMode * closest); /** * \brief Get the display index associated with a window. * * \return the display index of the display containing the center of the * window, or -1 on error. */ extern DECLSPEC int SDLCALL SDL_GetWindowDisplay(SDL_Window * window); /** * \brief Set the display mode used when a fullscreen window is visible. * * By default the window's dimensions and the desktop format and refresh rate * are used. * * \param mode The mode to use, or NULL for the default mode. * * \return 0 on success, or -1 if setting the display mode failed. * * \sa SDL_GetWindowDisplayMode() * \sa SDL_SetWindowFullscreen() */ extern DECLSPEC int SDLCALL SDL_SetWindowDisplayMode(SDL_Window * window, const SDL_DisplayMode * mode); /** * \brief Fill in information about the display mode used when a fullscreen * window is visible. * * \sa SDL_SetWindowDisplayMode() * \sa SDL_SetWindowFullscreen() */ extern DECLSPEC int SDLCALL SDL_GetWindowDisplayMode(SDL_Window * window, SDL_DisplayMode * mode); /** * \brief Get the pixel format associated with the window. */ extern DECLSPEC Uint32 SDLCALL SDL_GetWindowPixelFormat(SDL_Window * window); /** * \brief Create a window with the specified position, dimensions, and flags. * * \param title The title of the window, in UTF-8 encoding. * \param x The x position of the window, ::SDL_WINDOWPOS_CENTERED, or * ::SDL_WINDOWPOS_UNDEFINED. * \param y The y position of the window, ::SDL_WINDOWPOS_CENTERED, or * ::SDL_WINDOWPOS_UNDEFINED. * \param w The width of the window. * \param h The height of the window. * \param flags The flags for the window, a mask of any of the following: * ::SDL_WINDOW_FULLSCREEN, ::SDL_WINDOW_OPENGL, * ::SDL_WINDOW_SHOWN, ::SDL_WINDOW_BORDERLESS, * ::SDL_WINDOW_RESIZABLE, ::SDL_WINDOW_MAXIMIZED, * ::SDL_WINDOW_MINIMIZED, ::SDL_WINDOW_INPUT_GRABBED. * * \return The id of the window created, or zero if window creation failed. * * \sa SDL_DestroyWindow() */ extern DECLSPEC SDL_Window * SDLCALL SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags); /** * \brief Create an SDL window from an existing native window. * * \param data A pointer to driver-dependent window creation data * * \return The id of the window created, or zero if window creation failed. * * \sa SDL_DestroyWindow() */ extern DECLSPEC SDL_Window * SDLCALL SDL_CreateWindowFrom(const void *data); /** * \brief Get the numeric ID of a window, for logging purposes. */ extern DECLSPEC Uint32 SDLCALL SDL_GetWindowID(SDL_Window * window); /** * \brief Get a window from a stored ID, or NULL if it doesn't exist. */ extern DECLSPEC SDL_Window * SDLCALL SDL_GetWindowFromID(Uint32 id); /** * \brief Get the window flags. */ extern DECLSPEC Uint32 SDLCALL SDL_GetWindowFlags(SDL_Window * window); /** * \brief Set the title of a window, in UTF-8 format. * * \sa SDL_GetWindowTitle() */ extern DECLSPEC void SDLCALL SDL_SetWindowTitle(SDL_Window * window, const char *title); /** * \brief Get the title of a window, in UTF-8 format. * * \sa SDL_SetWindowTitle() */ extern DECLSPEC const char *SDLCALL SDL_GetWindowTitle(SDL_Window * window); /** * \brief Set the icon for a window. * * \param icon The icon for the window. */ extern DECLSPEC void SDLCALL SDL_SetWindowIcon(SDL_Window * window, SDL_Surface * icon); /** * \brief Associate an arbitrary named pointer with a window. * * \param window The window to associate with the pointer. * \param name The name of the pointer. * \param userdata The associated pointer. * * \return The previous value associated with 'name' * * \note The name is case-sensitive. * * \sa SDL_GetWindowData() */ extern DECLSPEC void* SDLCALL SDL_SetWindowData(SDL_Window * window, const char *name, void *userdata); /** * \brief Retrieve the data pointer associated with a window. * * \param window The window to query. * \param name The name of the pointer. * * \return The value associated with 'name' * * \sa SDL_SetWindowData() */ extern DECLSPEC void *SDLCALL SDL_GetWindowData(SDL_Window * window, const char *name); /** * \brief Set the position of a window. * * \param window The window to reposition. * \param x The x coordinate of the window, ::SDL_WINDOWPOS_CENTERED, or ::SDL_WINDOWPOS_UNDEFINED. * \param y The y coordinate of the window, ::SDL_WINDOWPOS_CENTERED, or ::SDL_WINDOWPOS_UNDEFINED. * * \note The window coordinate origin is the upper left of the display. * * \sa SDL_GetWindowPosition() */ extern DECLSPEC void SDLCALL SDL_SetWindowPosition(SDL_Window * window, int x, int y); /** * \brief Get the position of a window. * * \sa SDL_SetWindowPosition() */ extern DECLSPEC void SDLCALL SDL_GetWindowPosition(SDL_Window * window, int *x, int *y); /** * \brief Set the size of a window's client area. * * \note You can't change the size of a fullscreen window, it automatically * matches the size of the display mode. * * \sa SDL_GetWindowSize() */ extern DECLSPEC void SDLCALL SDL_SetWindowSize(SDL_Window * window, int w, int h); /** * \brief Get the size of a window's client area. * * \sa SDL_SetWindowSize() */ extern DECLSPEC void SDLCALL SDL_GetWindowSize(SDL_Window * window, int *w, int *h); /** * \brief Show a window. * * \sa SDL_HideWindow() */ extern DECLSPEC void SDLCALL SDL_ShowWindow(SDL_Window * window); /** * \brief Hide a window. * * \sa SDL_ShowWindow() */ extern DECLSPEC void SDLCALL SDL_HideWindow(SDL_Window * window); /** * \brief Raise a window above other windows and set the input focus. */ extern DECLSPEC void SDLCALL SDL_RaiseWindow(SDL_Window * window); /** * \brief Make a window as large as possible. * * \sa SDL_RestoreWindow() */ extern DECLSPEC void SDLCALL SDL_MaximizeWindow(SDL_Window * window); /** * \brief Minimize a window to an iconic representation. * * \sa SDL_RestoreWindow() */ extern DECLSPEC void SDLCALL SDL_MinimizeWindow(SDL_Window * window); /** * \brief Restore the size and position of a minimized or maximized window. * * \sa SDL_MaximizeWindow() * \sa SDL_MinimizeWindow() */ extern DECLSPEC void SDLCALL SDL_RestoreWindow(SDL_Window * window); /** * \brief Set a window's fullscreen state. * * \return 0 on success, or -1 if setting the display mode failed. * * \sa SDL_SetWindowDisplayMode() * \sa SDL_GetWindowDisplayMode() */ extern DECLSPEC int SDLCALL SDL_SetWindowFullscreen(SDL_Window * window, SDL_bool fullscreen); /** * \brief Get an SDL surface associated with the window. * * \return A surface in the optimal format for the window, or NULL on error. * * \note You may not combine this with 3D or the rendering API on this window. * * \sa SDL_UpdateWindowSurface() * \sa SDL_UpdateWindowSurfaceRects() */ extern DECLSPEC SDL_Surface * SDLCALL SDL_GetWindowSurface(SDL_Window * window); /** * \brief Copy the window surface to the screen. * * \return 0 on success, or -1 on error. * * \sa SDL_GetWindowSurface() * \sa SDL_UpdateWindowSurfaceRects() */ extern DECLSPEC int SDLCALL SDL_UpdateWindowSurface(SDL_Window * window); /** * \brief Copy a number of rectangles on the window surface to the screen. * * \return 0 on success, or -1 on error. * * \sa SDL_GetWindowSurface() * \sa SDL_UpdateWindowSurfaceRect() */ extern DECLSPEC int SDLCALL SDL_UpdateWindowSurfaceRects(SDL_Window * window, SDL_Rect * rects, int numrects); /** * \brief Set a window's input grab mode. * * \param grabbed This is SDL_TRUE to grab input, and SDL_FALSE to release input. * * \sa SDL_GetWindowGrab() */ extern DECLSPEC void SDLCALL SDL_SetWindowGrab(SDL_Window * window, SDL_bool grabbed); /** * \brief Get a window's input grab mode. * * \return This returns SDL_TRUE if input is grabbed, and SDL_FALSE otherwise. * * \sa SDL_SetWindowGrab() */ extern DECLSPEC SDL_bool SDLCALL SDL_GetWindowGrab(SDL_Window * window); /** * \brief Set the brightness (gamma correction) for a window. * * \return 0 on success, or -1 if setting the brightness isn't supported. * * \sa SDL_GetWindowBrightness() * \sa SDL_SetWindowGammaRamp() */ extern DECLSPEC int SDLCALL SDL_SetWindowBrightness(SDL_Window * window, float brightness); /** * \brief Get the brightness (gamma correction) for a window. * * \return The last brightness value passed to SDL_SetWindowBrightness() * * \sa SDL_SetWindowBrightness() */ extern DECLSPEC float SDLCALL SDL_GetWindowBrightness(SDL_Window * window); /** * \brief Set the gamma ramp for a window. * * \param red The translation table for the red channel, or NULL. * \param green The translation table for the green channel, or NULL. * \param blue The translation table for the blue channel, or NULL. * * \return 0 on success, or -1 if gamma ramps are unsupported. * * Set the gamma translation table for the red, green, and blue channels * of the video hardware. Each table is an array of 256 16-bit quantities, * representing a mapping between the input and output for that channel. * The input is the index into the array, and the output is the 16-bit * gamma value at that index, scaled to the output color precision. * * \sa SDL_SetWindowGammaRamp() */ extern DECLSPEC int SDLCALL SDL_SetWindowGammaRamp(SDL_Window * window, const Uint16 * red, const Uint16 * green, const Uint16 * blue); /** * \brief Get the gamma ramp for a window. * * \param red A pointer to a 256 element array of 16-bit quantities to hold * the translation table for the red channel, or NULL. * \param green A pointer to a 256 element array of 16-bit quantities to hold * the translation table for the green channel, or NULL. * \param blue A pointer to a 256 element array of 16-bit quantities to hold * the translation table for the blue channel, or NULL. * * \return 0 on success, or -1 if gamma ramps are unsupported. * * \sa SDL_SetWindowGammaRamp() */ extern DECLSPEC int SDLCALL SDL_GetWindowGammaRamp(SDL_Window * window, Uint16 * red, Uint16 * green, Uint16 * blue); /** * \brief Destroy a window. */ extern DECLSPEC void SDLCALL SDL_DestroyWindow(SDL_Window * window); /** * \brief Returns whether the screensaver is currently enabled (default on). * * \sa SDL_EnableScreenSaver() * \sa SDL_DisableScreenSaver() */ extern DECLSPEC SDL_bool SDLCALL SDL_IsScreenSaverEnabled(void); /** * \brief Allow the screen to be blanked by a screensaver * * \sa SDL_IsScreenSaverEnabled() * \sa SDL_DisableScreenSaver() */ extern DECLSPEC void SDLCALL SDL_EnableScreenSaver(void); /** * \brief Prevent the screen from being blanked by a screensaver * * \sa SDL_IsScreenSaverEnabled() * \sa SDL_EnableScreenSaver() */ extern DECLSPEC void SDLCALL SDL_DisableScreenSaver(void); /** * \name OpenGL support functions */ /*@{*/ /** * \brief Dynamically load an OpenGL library. * * \param path The platform dependent OpenGL library name, or NULL to open the * default OpenGL library. * * \return 0 on success, or -1 if the library couldn't be loaded. * * This should be done after initializing the video driver, but before * creating any OpenGL windows. If no OpenGL library is loaded, the default * library will be loaded upon creation of the first OpenGL window. * * \note If you do this, you need to retrieve all of the GL functions used in * your program from the dynamic library using SDL_GL_GetProcAddress(). * * \sa SDL_GL_GetProcAddress() * \sa SDL_GL_UnloadLibrary() */ extern DECLSPEC int SDLCALL SDL_GL_LoadLibrary(const char *path); /** * \brief Get the address of an OpenGL function. */ extern DECLSPEC void *SDLCALL SDL_GL_GetProcAddress(const char *proc); /** * \brief Unload the OpenGL library previously loaded by SDL_GL_LoadLibrary(). * * \sa SDL_GL_LoadLibrary() */ extern DECLSPEC void SDLCALL SDL_GL_UnloadLibrary(void); /** * \brief Return true if an OpenGL extension is supported for the current * context. */ extern DECLSPEC SDL_bool SDLCALL SDL_GL_ExtensionSupported(const char *extension); /** * \brief Set an OpenGL window attribute before window creation. */ extern DECLSPEC int SDLCALL SDL_GL_SetAttribute(SDL_GLattr attr, int value); /** * \brief Get the actual value for an attribute from the current context. */ extern DECLSPEC int SDLCALL SDL_GL_GetAttribute(SDL_GLattr attr, int *value); /** * \brief Create an OpenGL context for use with an OpenGL window, and make it * current. * * \sa SDL_GL_DeleteContext() */ extern DECLSPEC SDL_GLContext SDLCALL SDL_GL_CreateContext(SDL_Window * window); /** * \brief Set up an OpenGL context for rendering into an OpenGL window. * * \note The context must have been created with a compatible window. */ extern DECLSPEC int SDLCALL SDL_GL_MakeCurrent(SDL_Window * window, SDL_GLContext context); /** * \brief Set the swap interval for the current OpenGL context. * * \param interval 0 for immediate updates, 1 for updates synchronized with the * vertical retrace. * * \return 0 on success, or -1 if setting the swap interval is not supported. * * \sa SDL_GL_GetSwapInterval() */ extern DECLSPEC int SDLCALL SDL_GL_SetSwapInterval(int interval); /** * \brief Get the swap interval for the current OpenGL context. * * \return 0 if there is no vertical retrace synchronization, 1 if the buffer * swap is synchronized with the vertical retrace, and -1 if getting * the swap interval is not supported. * * \sa SDL_GL_SetSwapInterval() */ extern DECLSPEC int SDLCALL SDL_GL_GetSwapInterval(void); /** * \brief Swap the OpenGL buffers for a window, if double-buffering is * supported. */ extern DECLSPEC void SDLCALL SDL_GL_SwapWindow(SDL_Window * window); /** * \brief Delete an OpenGL context. * * \sa SDL_GL_CreateContext() */ extern DECLSPEC void SDLCALL SDL_GL_DeleteContext(SDL_GLContext context); /*@}*//*OpenGL support functions*/ /* Ends C function definitions when using C++ */ #ifdef __cplusplus /* *INDENT-OFF* */ } /* *INDENT-ON* */ #endif #include "close_code.h" #endif /* _SDL_video_h */ /* vi: set ts=4 sw=4 expandtab: */