/*

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_GetWindowGammaRamp()

*/

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: */