diff options
| author | Fox Caminiti <fox@foxcam.net> | 2022-12-18 20:00:47 -0500 |
|---|---|---|
| committer | Fox Caminiti <fox@foxcam.net> | 2022-12-18 20:00:47 -0500 |
| commit | 4854647d659f75ac6cf4575b61d1dcfd25865791 (patch) | |
| tree | 3296bdfa30fa76688844755b37094753ea82d033 /dependencies/SDL/SDL_video.h | |
| parent | bedd6906eabdd513042d6a178d4dc56a3a41d1d3 (diff) | |
lazy
Diffstat (limited to 'dependencies/SDL/SDL_video.h')
| -rw-r--r-- | dependencies/SDL/SDL_video.h | 2150 |
1 files changed, 2150 insertions, 0 deletions
diff --git a/dependencies/SDL/SDL_video.h b/dependencies/SDL/SDL_video.h new file mode 100644 index 0000000..b2f1509 --- /dev/null +++ b/dependencies/SDL/SDL_video.h @@ -0,0 +1,2150 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +/** + * \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 +extern "C" { +#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, in screen coordinates */ + int h; /**< height, in screen coordinates */ + 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_FlashWindow() + * \sa SDL_GetWindowData() + * \sa SDL_GetWindowFlags() + * \sa SDL_GetWindowGrab() + * \sa SDL_GetWindowKeyboardGrab() + * \sa SDL_GetWindowMouseGrab() + * \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_SetWindowKeyboardGrab() + * \sa SDL_SetWindowMouseGrab() + * \sa SDL_SetWindowIcon() + * \sa SDL_SetWindowPosition() + * \sa SDL_SetWindowSize() + * \sa SDL_SetWindowBordered() + * \sa SDL_SetWindowResizable() + * \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_MOUSE_GRABBED = 0x00000100, /**< window has grabbed mouse input */ + SDL_WINDOW_INPUT_FOCUS = 0x00000200, /**< window has input focus */ + SDL_WINDOW_MOUSE_FOCUS = 0x00000400, /**< window has mouse focus */ + SDL_WINDOW_FULLSCREEN_DESKTOP = ( SDL_WINDOW_FULLSCREEN | 0x00001000 ), + SDL_WINDOW_FOREIGN = 0x00000800, /**< window not created by SDL */ + SDL_WINDOW_ALLOW_HIGHDPI = 0x00002000, /**< window should be created in high-DPI mode if supported. + On macOS NSHighResolutionCapable must be set true in the + application's Info.plist for this to have any effect. */ + SDL_WINDOW_MOUSE_CAPTURE = 0x00004000, /**< window has mouse captured (unrelated to MOUSE_GRABBED) */ + SDL_WINDOW_ALWAYS_ON_TOP = 0x00008000, /**< window should always be above others */ + SDL_WINDOW_SKIP_TASKBAR = 0x00010000, /**< window should not be added to the taskbar */ + SDL_WINDOW_UTILITY = 0x00020000, /**< window should be treated as a utility window */ + SDL_WINDOW_TOOLTIP = 0x00040000, /**< window should be treated as a tooltip */ + SDL_WINDOW_POPUP_MENU = 0x00080000, /**< window should be treated as a popup menu */ + SDL_WINDOW_KEYBOARD_GRABBED = 0x00100000, /**< window has grabbed keyboard input */ + SDL_WINDOW_VULKAN = 0x10000000, /**< window usable for Vulkan surface */ + SDL_WINDOW_METAL = 0x20000000, /**< window usable for Metal view */ + + SDL_WINDOW_INPUT_GRABBED = SDL_WINDOW_MOUSE_GRABBED /**< equivalent to SDL_WINDOW_MOUSE_GRABBED for compatibility */ +} SDL_WindowFlags; + +/** + * \brief Used to indicate that you don't care what the window position is. + */ +#define SDL_WINDOWPOS_UNDEFINED_MASK 0x1FFF0000u +#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 0x2FFF0000u +#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_WINDOWEVENT_TAKE_FOCUS, /**< Window is being offered a focus (should SetWindowInputFocus() on itself or a subwindow, or ignore) */ + SDL_WINDOWEVENT_HIT_TEST, /**< Window had a hit test that wasn't SDL_HITTEST_NORMAL. */ + SDL_WINDOWEVENT_ICCPROF_CHANGED,/**< The ICC profile of the window's display has changed. */ + SDL_WINDOWEVENT_DISPLAY_CHANGED /**< Window has been moved to display data1. */ +} SDL_WindowEventID; + +/** + * \brief Event subtype for display events + */ +typedef enum +{ + SDL_DISPLAYEVENT_NONE, /**< Never used */ + SDL_DISPLAYEVENT_ORIENTATION, /**< Display orientation has changed to data1 */ + SDL_DISPLAYEVENT_CONNECTED, /**< Display has been added to the system */ + SDL_DISPLAYEVENT_DISCONNECTED /**< Display has been removed from the system */ +} SDL_DisplayEventID; + +/** + * \brief Display orientation + */ +typedef enum +{ + SDL_ORIENTATION_UNKNOWN, /**< The display orientation can't be determined */ + SDL_ORIENTATION_LANDSCAPE, /**< The display is in landscape mode, with the right side up, relative to portrait mode */ + SDL_ORIENTATION_LANDSCAPE_FLIPPED, /**< The display is in landscape mode, with the left side up, relative to portrait mode */ + SDL_ORIENTATION_PORTRAIT, /**< The display is in portrait mode */ + SDL_ORIENTATION_PORTRAIT_FLIPPED /**< The display is in portrait mode, upside down */ +} SDL_DisplayOrientation; + +/** + * \brief Window flash operation + */ +typedef enum +{ + SDL_FLASH_CANCEL, /**< Cancel any window flash state */ + SDL_FLASH_BRIEFLY, /**< Flash the window briefly to get attention */ + SDL_FLASH_UNTIL_FOCUSED /**< Flash the window until it gets focus */ +} SDL_FlashOperation; + +/** + * \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_GL_CONTEXT_EGL, + SDL_GL_CONTEXT_FLAGS, + SDL_GL_CONTEXT_PROFILE_MASK, + SDL_GL_SHARE_WITH_CURRENT_CONTEXT, + SDL_GL_FRAMEBUFFER_SRGB_CAPABLE, + SDL_GL_CONTEXT_RELEASE_BEHAVIOR, + SDL_GL_CONTEXT_RESET_NOTIFICATION, + SDL_GL_CONTEXT_NO_ERROR, + SDL_GL_FLOATBUFFERS +} SDL_GLattr; + +typedef enum +{ + SDL_GL_CONTEXT_PROFILE_CORE = 0x0001, + SDL_GL_CONTEXT_PROFILE_COMPATIBILITY = 0x0002, + SDL_GL_CONTEXT_PROFILE_ES = 0x0004 /**< GLX_CONTEXT_ES2_PROFILE_BIT_EXT */ +} SDL_GLprofile; + +typedef enum +{ + SDL_GL_CONTEXT_DEBUG_FLAG = 0x0001, + SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG = 0x0002, + SDL_GL_CONTEXT_ROBUST_ACCESS_FLAG = 0x0004, + SDL_GL_CONTEXT_RESET_ISOLATION_FLAG = 0x0008 +} SDL_GLcontextFlag; + +typedef enum +{ + SDL_GL_CONTEXT_RELEASE_BEHAVIOR_NONE = 0x0000, + SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH = 0x0001 +} SDL_GLcontextReleaseFlag; + +typedef enum +{ + SDL_GL_CONTEXT_RESET_NO_NOTIFICATION = 0x0000, + SDL_GL_CONTEXT_RESET_LOSE_CONTEXT = 0x0001 +} SDL_GLContextResetNotification; + +/* Function prototypes */ + +/** + * Get the number of video drivers compiled into SDL. + * + * \returns a number >= 1 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetVideoDriver + */ +extern DECLSPEC int SDLCALL SDL_GetNumVideoDrivers(void); + +/** + * Get the name of a built in video driver. + * + * The video drivers are presented in the order in which they are normally + * checked during initialization. + * + * \param index the index of a video driver + * \returns the name of the video driver with the given **index**. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetNumVideoDrivers + */ +extern DECLSPEC const char *SDLCALL SDL_GetVideoDriver(int index); + +/** + * Initialize the video subsystem, optionally specifying a video driver. + * + * 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. + * + * If you use this function and you haven't used the SDL_INIT_VIDEO flag with + * either SDL_Init() or SDL_InitSubSystem(), you should call SDL_VideoQuit() + * before calling SDL_Quit(). + * + * It is safe to call this function multiple times. SDL_VideoInit() will call + * SDL_VideoQuit() itself if the video subsystem has already been initialized. + * + * You can use SDL_GetNumVideoDrivers() and SDL_GetVideoDriver() to find a + * specific `driver_name`. + * + * \param driver_name the name of a video driver to initialize, or NULL for + * the default driver + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetNumVideoDrivers + * \sa SDL_GetVideoDriver + * \sa SDL_InitSubSystem + * \sa SDL_VideoQuit + */ +extern DECLSPEC int SDLCALL SDL_VideoInit(const char *driver_name); + +/** + * Shut down the video subsystem, if initialized with SDL_VideoInit(). + * + * This function closes all windows, and restores the original video mode. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_VideoInit + */ +extern DECLSPEC void SDLCALL SDL_VideoQuit(void); + +/** + * Get the name of the currently initialized video driver. + * + * \returns the name of the current video driver or NULL if no driver has been + * initialized. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetNumVideoDrivers + * \sa SDL_GetVideoDriver + */ +extern DECLSPEC const char *SDLCALL SDL_GetCurrentVideoDriver(void); + +/** + * Get the number of available video displays. + * + * \returns a number >= 1 or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetDisplayBounds + */ +extern DECLSPEC int SDLCALL SDL_GetNumVideoDisplays(void); + +/** + * Get the name of a display in UTF-8 encoding. + * + * \param displayIndex the index of display from which the name should be + * queried + * \returns the name of a display or NULL for an invalid display index or + * failure; call SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC const char * SDLCALL SDL_GetDisplayName(int displayIndex); + +/** + * Get the desktop area represented by a display. + * + * The primary display (`displayIndex` zero) is always located at 0,0. + * + * \param displayIndex the index of the display to query + * \param rect the SDL_Rect structure filled in with the display bounds + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC int SDLCALL SDL_GetDisplayBounds(int displayIndex, SDL_Rect * rect); + +/** + * Get the usable desktop area represented by a display. + * + * The primary display (`displayIndex` zero) is always located at 0,0. + * + * This is the same area as SDL_GetDisplayBounds() reports, but with portions + * reserved by the system removed. For example, on Apple's macOS, this + * subtracts the area occupied by the menu bar and dock. + * + * Setting a window to be fullscreen generally bypasses these unusable areas, + * so these are good guidelines for the maximum space available to a + * non-fullscreen window. + * + * The parameter `rect` is ignored if it is NULL. + * + * This function also returns -1 if the parameter `displayIndex` is out of + * range. + * + * \param displayIndex the index of the display to query the usable bounds + * from + * \param rect the SDL_Rect structure filled in with the display bounds + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.5. + * + * \sa SDL_GetDisplayBounds + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC int SDLCALL SDL_GetDisplayUsableBounds(int displayIndex, SDL_Rect * rect); + +/** + * Get the dots/pixels-per-inch for a display. + * + * Diagonal, horizontal and vertical DPI can all be optionally returned if the + * appropriate parameter is non-NULL. + * + * A failure of this function usually means that either no DPI information is + * available or the `displayIndex` is out of range. + * + * **WARNING**: This reports the DPI that the hardware reports, and it is not + * always reliable! It is almost always better to use SDL_GetWindowSize() to + * find the window size, which might be in logical points instead of pixels, + * and then SDL_GL_GetDrawableSize(), SDL_Vulkan_GetDrawableSize(), + * SDL_Metal_GetDrawableSize(), or SDL_GetRendererOutputSize(), and compare + * the two values to get an actual scaling value between the two. We will be + * rethinking how high-dpi details should be managed in SDL3 to make things + * more consistent, reliable, and clear. + * + * \param displayIndex the index of the display from which DPI information + * should be queried + * \param ddpi a pointer filled in with the diagonal DPI of the display; may + * be NULL + * \param hdpi a pointer filled in with the horizontal DPI of the display; may + * be NULL + * \param vdpi a pointer filled in with the vertical DPI of the display; may + * be NULL + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.4. + * + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC int SDLCALL SDL_GetDisplayDPI(int displayIndex, float * ddpi, float * hdpi, float * vdpi); + +/** + * Get the orientation of a display. + * + * \param displayIndex the index of the display to query + * \returns The SDL_DisplayOrientation enum value of the display, or + * `SDL_ORIENTATION_UNKNOWN` if it isn't available. + * + * \since This function is available since SDL 2.0.9. + * + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC SDL_DisplayOrientation SDLCALL SDL_GetDisplayOrientation(int displayIndex); + +/** + * Get the number of available display modes. + * + * The `displayIndex` needs to be in the range from 0 to + * SDL_GetNumVideoDisplays() - 1. + * + * \param displayIndex the index of the display to query + * \returns a number >= 1 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetDisplayMode + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC int SDLCALL SDL_GetNumDisplayModes(int displayIndex); + +/** + * Get information about a specific display mode. + * + * The display modes are sorted in this priority: + * + * - width -> largest to smallest + * - height -> largest to smallest + * - bits per pixel -> more colors to fewer colors + * - packed pixel layout -> largest to smallest + * - refresh rate -> highest to lowest + * + * \param displayIndex the index of the display to query + * \param modeIndex the index of the display mode to query + * \param mode an SDL_DisplayMode structure filled in with the mode at + * `modeIndex` + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetNumDisplayModes + */ +extern DECLSPEC int SDLCALL SDL_GetDisplayMode(int displayIndex, int modeIndex, + SDL_DisplayMode * mode); + +/** + * Get information about the desktop's display mode. + * + * There's a difference between this function and SDL_GetCurrentDisplayMode() + * when SDL runs fullscreen and has changed the resolution. In that case this + * function will return the previous native display mode, and not the current + * display mode. + * + * \param displayIndex the index of the display to query + * \param mode an SDL_DisplayMode structure filled in with the current display + * mode + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetCurrentDisplayMode + * \sa SDL_GetDisplayMode + * \sa SDL_SetWindowDisplayMode + */ +extern DECLSPEC int SDLCALL SDL_GetDesktopDisplayMode(int displayIndex, SDL_DisplayMode * mode); + +/** + * Get information about the current display mode. + * + * There's a difference between this function and SDL_GetDesktopDisplayMode() + * when SDL runs fullscreen and has changed the resolution. In that case this + * function will return the current display mode, and not the previous native + * display mode. + * + * \param displayIndex the index of the display to query + * \param mode an SDL_DisplayMode structure filled in with the current display + * mode + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetDesktopDisplayMode + * \sa SDL_GetDisplayMode + * \sa SDL_GetNumVideoDisplays + * \sa SDL_SetWindowDisplayMode + */ +extern DECLSPEC int SDLCALL SDL_GetCurrentDisplayMode(int displayIndex, SDL_DisplayMode * mode); + + +/** + * Get the closest match to the requested display mode. + * + * The available display modes are scanned and `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 set to 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. + * + * \param displayIndex the index of the display to query + * \param mode an SDL_DisplayMode structure containing the desired display + * mode + * \param closest an SDL_DisplayMode structure filled in with the closest + * match of the available display modes + * \returns the passed in value `closest` or NULL if no matching video mode + * was available; call SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetDisplayMode + * \sa SDL_GetNumDisplayModes + */ +extern DECLSPEC SDL_DisplayMode * SDLCALL SDL_GetClosestDisplayMode(int displayIndex, const SDL_DisplayMode * mode, SDL_DisplayMode * closest); + +/** + * Get the index of the display containing a point + * + * \param point the point to query + * \returns the index of the display containing the point or a negative error + * code on failure; call SDL_GetError() for more information. + * + * \since This function is available since SDL 2.24.0. + * + * \sa SDL_GetDisplayBounds + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC int SDLCALL SDL_GetPointDisplayIndex(const SDL_Point * point); + +/** + * Get the index of the display primarily containing a rect + * + * \param rect the rect to query + * \returns the index of the display entirely containing the rect or closest + * to the center of the rect on success or a negative error code on + * failure; call SDL_GetError() for more information. + * + * \since This function is available since SDL 2.24.0. + * + * \sa SDL_GetDisplayBounds + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC int SDLCALL SDL_GetRectDisplayIndex(const SDL_Rect * rect); + +/** + * Get the index of the display associated with a window. + * + * \param window the window to query + * \returns the index of the display containing the center of the window on + * success or a negative error code on failure; call SDL_GetError() + * for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetDisplayBounds + * \sa SDL_GetNumVideoDisplays + */ +extern DECLSPEC int SDLCALL SDL_GetWindowDisplayIndex(SDL_Window * window); + +/** + * Set the display mode to use when a window is visible at fullscreen. + * + * This only affects the display mode used when the window is fullscreen. To + * change the window size when the window is not fullscreen, use + * SDL_SetWindowSize(). + * + * \param window the window to affect + * \param mode the SDL_DisplayMode structure representing the mode to use, or + * NULL to use the window's dimensions and the desktop's format + * and refresh rate + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowDisplayMode + * \sa SDL_SetWindowFullscreen + */ +extern DECLSPEC int SDLCALL SDL_SetWindowDisplayMode(SDL_Window * window, + const SDL_DisplayMode * mode); + +/** + * Query the display mode to use when a window is visible at fullscreen. + * + * \param window the window to query + * \param mode an SDL_DisplayMode structure filled in with the fullscreen + * display mode + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetWindowDisplayMode + * \sa SDL_SetWindowFullscreen + */ +extern DECLSPEC int SDLCALL SDL_GetWindowDisplayMode(SDL_Window * window, + SDL_DisplayMode * mode); + +/** + * Get the raw ICC profile data for the screen the window is currently on. + * + * Data returned should be freed with SDL_free. + * + * \param window the window to query + * \param size the size of the ICC profile + * \returns the raw ICC profile data on success or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.18. + */ +extern DECLSPEC void* SDLCALL SDL_GetWindowICCProfile(SDL_Window * window, size_t* size); + +/** + * Get the pixel format associated with the window. + * + * \param window the window to query + * \returns the pixel format of the window on success or + * SDL_PIXELFORMAT_UNKNOWN on failure; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 2.0.0. + */ +extern DECLSPEC Uint32 SDLCALL SDL_GetWindowPixelFormat(SDL_Window * window); + +/** + * Create a window with the specified position, dimensions, and flags. + * + * `flags` may be any of the following OR'd together: + * + * - `SDL_WINDOW_FULLSCREEN`: fullscreen window + * - `SDL_WINDOW_FULLSCREEN_DESKTOP`: fullscreen window at desktop resolution + * - `SDL_WINDOW_OPENGL`: window usable with an OpenGL context + * - `SDL_WINDOW_VULKAN`: window usable with a Vulkan instance + * - `SDL_WINDOW_METAL`: window usable with a Metal instance + * - `SDL_WINDOW_HIDDEN`: window is not visible + * - `SDL_WINDOW_BORDERLESS`: no window decoration + * - `SDL_WINDOW_RESIZABLE`: window can be resized + * - `SDL_WINDOW_MINIMIZED`: window is minimized + * - `SDL_WINDOW_MAXIMIZED`: window is maximized + * - `SDL_WINDOW_INPUT_GRABBED`: window has grabbed input focus + * - `SDL_WINDOW_ALLOW_HIGHDPI`: window should be created in high-DPI mode if + * supported (>= SDL 2.0.1) + * + * `SDL_WINDOW_SHOWN` is ignored by SDL_CreateWindow(). The SDL_Window is + * implicitly shown if SDL_WINDOW_HIDDEN is not set. `SDL_WINDOW_SHOWN` may be + * queried later using SDL_GetWindowFlags(). + * + * On Apple's macOS, you **must** set the NSHighResolutionCapable Info.plist + * property to YES, otherwise you will not receive a High-DPI OpenGL canvas. + * + * If the window is created with the `SDL_WINDOW_ALLOW_HIGHDPI` flag, its size + * in pixels may differ from its size in screen coordinates on platforms with + * high-DPI support (e.g. iOS and macOS). Use SDL_GetWindowSize() to query the + * client area's size in screen coordinates, and SDL_GL_GetDrawableSize() or + * SDL_GetRendererOutputSize() to query the drawable size in pixels. Note that + * when this flag is set, the drawable size can vary after the window is + * created and should be queried after major window events such as when the + * window is resized or moved between displays. + * + * If the window is set fullscreen, the width and height parameters `w` and + * `h` will not be used. However, invalid size parameters (e.g. too large) may + * still fail. Window size is actually limited to 16384 x 16384 for all + * platforms at window creation. + * + * If the window is created with any of the SDL_WINDOW_OPENGL or + * SDL_WINDOW_VULKAN flags, then the corresponding LoadLibrary function + * (SDL_GL_LoadLibrary or SDL_Vulkan_LoadLibrary) is called and the + * corresponding UnloadLibrary function is called by SDL_DestroyWindow(). + * + * If SDL_WINDOW_VULKAN is specified and there isn't a working Vulkan driver, + * SDL_CreateWindow() will fail because SDL_Vulkan_LoadLibrary() will fail. + * + * If SDL_WINDOW_METAL is specified on an OS that does not support Metal, + * SDL_CreateWindow() will fail. + * + * On non-Apple devices, SDL requires you to either not link to the Vulkan + * loader or link to a dynamic library version. This limitation may be removed + * in a future version of SDL. + * + * \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, in screen coordinates + * \param h the height of the window, in screen coordinates + * \param flags 0, or one or more SDL_WindowFlags OR'd together + * \returns the window that was created or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_CreateWindowFrom + * \sa SDL_DestroyWindow + */ +extern DECLSPEC SDL_Window * SDLCALL SDL_CreateWindow(const char *title, + int x, int y, int w, + int h, Uint32 flags); + +/** + * Create an SDL window from an existing native window. + * + * In some cases (e.g. OpenGL) and on some platforms (e.g. Microsoft Windows) + * the hint `SDL_HINT_VIDEO_WINDOW_SHARE_PIXEL_FORMAT` needs to be configured + * before using SDL_CreateWindowFrom(). + * + * \param data a pointer to driver-dependent window creation data, typically + * your native window cast to a void* + * \returns the window that was created or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_CreateWindow + * \sa SDL_DestroyWindow + */ +extern DECLSPEC SDL_Window * SDLCALL SDL_CreateWindowFrom(const void *data); + +/** + * Get the numeric ID of a window. + * + * The numeric ID is what SDL_WindowEvent references, and is necessary to map + * these events to specific SDL_Window objects. + * + * \param window the window to query + * \returns the ID of the window on success or 0 on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowFromID + */ +extern DECLSPEC Uint32 SDLCALL SDL_GetWindowID(SDL_Window * window); + +/** + * Get a window from a stored ID. + * + * The numeric ID is what SDL_WindowEvent references, and is necessary to map + * these events to specific SDL_Window objects. + * + * \param id the ID of the window + * \returns the window associated with `id` or NULL if it doesn't exist; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowID + */ +extern DECLSPEC SDL_Window * SDLCALL SDL_GetWindowFromID(Uint32 id); + +/** + * Get the window flags. + * + * \param window the window to query + * \returns a mask of the SDL_WindowFlags associated with `window` + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_CreateWindow + * \sa SDL_HideWindow + * \sa SDL_MaximizeWindow + * \sa SDL_MinimizeWindow + * \sa SDL_SetWindowFullscreen + * \sa SDL_SetWindowGrab + * \sa SDL_ShowWindow + */ +extern DECLSPEC Uint32 SDLCALL SDL_GetWindowFlags(SDL_Window * window); + +/** + * Set the title of a window. + * + * This string is expected to be in UTF-8 encoding. + * + * \param window the window to change + * \param title the desired window title in UTF-8 format + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowTitle + */ +extern DECLSPEC void SDLCALL SDL_SetWindowTitle(SDL_Window * window, + const char *title); + +/** + * Get the title of a window. + * + * \param window the window to query + * \returns the title of the window in UTF-8 format or "" if there is no + * title. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetWindowTitle + */ +extern DECLSPEC const char *SDLCALL SDL_GetWindowTitle(SDL_Window * window); + +/** + * Set the icon for a window. + * + * \param window the window to change + * \param icon an SDL_Surface structure containing the icon for the window + * + * \since This function is available since SDL 2.0.0. + */ +extern DECLSPEC void SDLCALL SDL_SetWindowIcon(SDL_Window * window, + SDL_Surface * icon); + +/** + * Associate an arbitrary named pointer with a window. + * + * `name` is case-sensitive. + * + * \param window the window to associate with the pointer + * \param name the name of the pointer + * \param userdata the associated pointer + * \returns the previous value associated with `name`. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowData + */ +extern DECLSPEC void* SDLCALL SDL_SetWindowData(SDL_Window * window, + const char *name, + void *userdata); + +/** + * Retrieve the data pointer associated with a window. + * + * \param window the window to query + * \param name the name of the pointer + * \returns the value associated with `name`. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetWindowData + */ +extern DECLSPEC void *SDLCALL SDL_GetWindowData(SDL_Window * window, + const char *name); + +/** + * Set the position of a window. + * + * The window coordinate origin is the upper left of the display. + * + * \param window the window to reposition + * \param x the x coordinate of the window in screen coordinates, or + * `SDL_WINDOWPOS_CENTERED` or `SDL_WINDOWPOS_UNDEFINED` + * \param y the y coordinate of the window in screen coordinates, or + * `SDL_WINDOWPOS_CENTERED` or `SDL_WINDOWPOS_UNDEFINED` + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowPosition + */ +extern DECLSPEC void SDLCALL SDL_SetWindowPosition(SDL_Window * window, + int x, int y); + +/** + * Get the position of a window. + * + * If you do not need the value for one of the positions a NULL may be passed + * in the `x` or `y` parameter. + * + * \param window the window to query + * \param x a pointer filled in with the x position of the window, in screen + * coordinates, may be NULL + * \param y a pointer filled in with the y position of the window, in screen + * coordinates, may be NULL + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetWindowPosition + */ +extern DECLSPEC void SDLCALL SDL_GetWindowPosition(SDL_Window * window, + int *x, int *y); + +/** + * Set the size of a window's client area. + * + * The window size in screen coordinates may differ from the size in pixels, + * if the window was created with `SDL_WINDOW_ALLOW_HIGHDPI` on a platform + * with high-dpi support (e.g. iOS or macOS). Use SDL_GL_GetDrawableSize() or + * SDL_GetRendererOutputSize() to get the real client area size in pixels. + * + * Fullscreen windows automatically match the size of the display mode, and + * you should use SDL_SetWindowDisplayMode() to change their size. + * + * \param window the window to change + * \param w the width of the window in pixels, in screen coordinates, must be + * > 0 + * \param h the height of the window in pixels, in screen coordinates, must be + * > 0 + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowSize + * \sa SDL_SetWindowDisplayMode + */ +extern DECLSPEC void SDLCALL SDL_SetWindowSize(SDL_Window * window, int w, + int h); + +/** + * Get the size of a window's client area. + * + * NULL can safely be passed as the `w` or `h` parameter if the width or + * height value is not desired. + * + * The window size in screen coordinates may differ from the size in pixels, + * if the window was created with `SDL_WINDOW_ALLOW_HIGHDPI` on a platform + * with high-dpi support (e.g. iOS or macOS). Use SDL_GL_GetDrawableSize(), + * SDL_Vulkan_GetDrawableSize(), or SDL_GetRendererOutputSize() to get the + * real client area size in pixels. + * + * \param window the window to query the width and height from + * \param w a pointer filled in with the width of the window, in screen + * coordinates, may be NULL + * \param h a pointer filled in with the height of the window, in screen + * coordinates, may be NULL + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_GetDrawableSize + * \sa SDL_Vulkan_GetDrawableSize + * \sa SDL_SetWindowSize + */ +extern DECLSPEC void SDLCALL SDL_GetWindowSize(SDL_Window * window, int *w, + int *h); + +/** + * Get the size of a window's borders (decorations) around the client area. + * + * Note: If this function fails (returns -1), the size values will be + * initialized to 0, 0, 0, 0 (if a non-NULL pointer is provided), as if the + * window in question was borderless. + * + * Note: This function may fail on systems where the window has not yet been + * decorated by the display server (for example, immediately after calling + * SDL_CreateWindow). It is recommended that you wait at least until the + * window has been presented and composited, so that the window system has a + * chance to decorate the window and provide the border dimensions to SDL. + * + * This function also returns -1 if getting the information is not supported. + * + * \param window the window to query the size values of the border + * (decorations) from + * \param top pointer to variable for storing the size of the top border; NULL + * is permitted + * \param left pointer to variable for storing the size of the left border; + * NULL is permitted + * \param bottom pointer to variable for storing the size of the bottom + * border; NULL is permitted + * \param right pointer to variable for storing the size of the right border; + * NULL is permitted + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.5. + * + * \sa SDL_GetWindowSize + */ +extern DECLSPEC int SDLCALL SDL_GetWindowBordersSize(SDL_Window * window, + int *top, int *left, + int *bottom, int *right); + +/** + * Get the size of a window in pixels. + * + * This may differ from SDL_GetWindowSize() if we're rendering to a high-DPI + * drawable, i.e. the window was created with `SDL_WINDOW_ALLOW_HIGHDPI` on a + * platform with high-DPI support (Apple calls this "Retina"), and not + * disabled by the `SDL_HINT_VIDEO_HIGHDPI_DISABLED` hint. + * + * \param window the window from which the drawable size should be queried + * \param w a pointer to variable for storing the width in pixels, may be NULL + * \param h a pointer to variable for storing the height in pixels, may be + * NULL + * + * \since This function is available since SDL 2.26.0. + * + * \sa SDL_CreateWindow + * \sa SDL_GetWindowSize + */ +extern DECLSPEC void SDLCALL SDL_GetWindowSizeInPixels(SDL_Window * window, + int *w, int *h); + +/** + * Set the minimum size of a window's client area. + * + * \param window the window to change + * \param min_w the minimum width of the window in pixels + * \param min_h the minimum height of the window in pixels + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowMinimumSize + * \sa SDL_SetWindowMaximumSize + */ +extern DECLSPEC void SDLCALL SDL_SetWindowMinimumSize(SDL_Window * window, + int min_w, int min_h); + +/** + * Get the minimum size of a window's client area. + * + * \param window the window to query + * \param w a pointer filled in with the minimum width of the window, may be + * NULL + * \param h a pointer filled in with the minimum height of the window, may be + * NULL + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowMaximumSize + * \sa SDL_SetWindowMinimumSize + */ +extern DECLSPEC void SDLCALL SDL_GetWindowMinimumSize(SDL_Window * window, + int *w, int *h); + +/** + * Set the maximum size of a window's client area. + * + * \param window the window to change + * \param max_w the maximum width of the window in pixels + * \param max_h the maximum height of the window in pixels + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowMaximumSize + * \sa SDL_SetWindowMinimumSize + */ +extern DECLSPEC void SDLCALL SDL_SetWindowMaximumSize(SDL_Window * window, + int max_w, int max_h); + +/** + * Get the maximum size of a window's client area. + * + * \param window the window to query + * \param w a pointer filled in with the maximum width of the window, may be + * NULL + * \param h a pointer filled in with the maximum height of the window, may be + * NULL + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowMinimumSize + * \sa SDL_SetWindowMaximumSize + */ +extern DECLSPEC void SDLCALL SDL_GetWindowMaximumSize(SDL_Window * window, + int *w, int *h); + +/** + * Set the border state of a window. + * + * This will add or remove the window's `SDL_WINDOW_BORDERLESS` flag and add + * or remove the border from the actual window. This is a no-op if the + * window's border already matches the requested state. + * + * You can't change the border state of a fullscreen window. + * + * \param window the window of which to change the border state + * \param bordered SDL_FALSE to remove border, SDL_TRUE to add border + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowFlags + */ +extern DECLSPEC void SDLCALL SDL_SetWindowBordered(SDL_Window * window, + SDL_bool bordered); + +/** + * Set the user-resizable state of a window. + * + * This will add or remove the window's `SDL_WINDOW_RESIZABLE` flag and + * allow/disallow user resizing of the window. This is a no-op if the window's + * resizable state already matches the requested state. + * + * You can't change the resizable state of a fullscreen window. + * + * \param window the window of which to change the resizable state + * \param resizable SDL_TRUE to allow resizing, SDL_FALSE to disallow + * + * \since This function is available since SDL 2.0.5. + * + * \sa SDL_GetWindowFlags + */ +extern DECLSPEC void SDLCALL SDL_SetWindowResizable(SDL_Window * window, + SDL_bool resizable); + +/** + * Set the window to always be above the others. + * + * This will add or remove the window's `SDL_WINDOW_ALWAYS_ON_TOP` flag. This + * will bring the window to the front and keep the window above the rest. + * + * \param window The window of which to change the always on top state + * \param on_top SDL_TRUE to set the window always on top, SDL_FALSE to + * disable + * + * \since This function is available since SDL 2.0.16. + * + * \sa SDL_GetWindowFlags + */ +extern DECLSPEC void SDLCALL SDL_SetWindowAlwaysOnTop(SDL_Window * window, + SDL_bool on_top); + +/** + * Show a window. + * + * \param window the window to show + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_HideWindow + * \sa SDL_RaiseWindow + */ +extern DECLSPEC void SDLCALL SDL_ShowWindow(SDL_Window * window); + +/** + * Hide a window. + * + * \param window the window to hide + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_ShowWindow + */ +extern DECLSPEC void SDLCALL SDL_HideWindow(SDL_Window * window); + +/** + * Raise a window above other windows and set the input focus. + * + * \param window the window to raise + * + * \since This function is available since SDL 2.0.0. + */ +extern DECLSPEC void SDLCALL SDL_RaiseWindow(SDL_Window * window); + +/** + * Make a window as large as possible. + * + * \param window the window to maximize + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_MinimizeWindow + * \sa SDL_RestoreWindow + */ +extern DECLSPEC void SDLCALL SDL_MaximizeWindow(SDL_Window * window); + +/** + * Minimize a window to an iconic representation. + * + * \param window the window to minimize + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_MaximizeWindow + * \sa SDL_RestoreWindow + */ +extern DECLSPEC void SDLCALL SDL_MinimizeWindow(SDL_Window * window); + +/** + * Restore the size and position of a minimized or maximized window. + * + * \param window the window to restore + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_MaximizeWindow + * \sa SDL_MinimizeWindow + */ +extern DECLSPEC void SDLCALL SDL_RestoreWindow(SDL_Window * window); + +/** + * Set a window's fullscreen state. + * + * `flags` may be `SDL_WINDOW_FULLSCREEN`, for "real" fullscreen with a + * videomode change; `SDL_WINDOW_FULLSCREEN_DESKTOP` for "fake" fullscreen + * that takes the size of the desktop; and 0 for windowed mode. + * + * \param window the window to change + * \param flags `SDL_WINDOW_FULLSCREEN`, `SDL_WINDOW_FULLSCREEN_DESKTOP` or 0 + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowDisplayMode + * \sa SDL_SetWindowDisplayMode + */ +extern DECLSPEC int SDLCALL SDL_SetWindowFullscreen(SDL_Window * window, + Uint32 flags); + +/** + * Get the SDL surface associated with the window. + * + * A new surface will be created with the optimal format for the window, if + * necessary. This surface will be freed when the window is destroyed. Do not + * free this surface. + * + * This surface will be invalidated if the window is resized. After resizing a + * window this function must be called again to return a valid surface. + * + * You may not combine this with 3D or the rendering API on this window. + * + * This function is affected by `SDL_HINT_FRAMEBUFFER_ACCELERATION`. + * + * \param window the window to query + * \returns the surface associated with the window, or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_UpdateWindowSurface + * \sa SDL_UpdateWindowSurfaceRects + */ +extern DECLSPEC SDL_Surface * SDLCALL SDL_GetWindowSurface(SDL_Window * window); + +/** + * Copy the window surface to the screen. + * + * This is the function you use to reflect any changes to the surface on the + * screen. + * + * This function is equivalent to the SDL 1.2 API SDL_Flip(). + * + * \param window the window to update + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowSurface + * \sa SDL_UpdateWindowSurfaceRects + */ +extern DECLSPEC int SDLCALL SDL_UpdateWindowSurface(SDL_Window * window); + +/** + * Copy areas of the window surface to the screen. + * + * This is the function you use to reflect changes to portions of the surface + * on the screen. + * + * This function is equivalent to the SDL 1.2 API SDL_UpdateRects(). + * + * \param window the window to update + * \param rects an array of SDL_Rect structures representing areas of the + * surface to copy + * \param numrects the number of rectangles + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowSurface + * \sa SDL_UpdateWindowSurface + */ +extern DECLSPEC int SDLCALL SDL_UpdateWindowSurfaceRects(SDL_Window * window, + const SDL_Rect * rects, + int numrects); + +/** + * Set a window's input grab mode. + * + * When input is grabbed, the mouse is confined to the window. This function + * will also grab the keyboard if `SDL_HINT_GRAB_KEYBOARD` is set. To grab the + * keyboard without also grabbing the mouse, use SDL_SetWindowKeyboardGrab(). + * + * If the caller enables a grab while another window is currently grabbed, the + * other window loses its grab in favor of the caller's window. + * + * \param window the window for which the input grab mode should be set + * \param grabbed SDL_TRUE to grab input or SDL_FALSE to release input + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetGrabbedWindow + * \sa SDL_GetWindowGrab + */ +extern DECLSPEC void SDLCALL SDL_SetWindowGrab(SDL_Window * window, + SDL_bool grabbed); + +/** + * Set a window's keyboard grab mode. + * + * Keyboard grab enables capture of system keyboard shortcuts like Alt+Tab or + * the Meta/Super key. Note that not all system keyboard shortcuts can be + * captured by applications (one example is Ctrl+Alt+Del on Windows). + * + * This is primarily intended for specialized applications such as VNC clients + * or VM frontends. Normal games should not use keyboard grab. + * + * When keyboard grab is enabled, SDL will continue to handle Alt+Tab when the + * window is full-screen to ensure the user is not trapped in your + * application. If you have a custom keyboard shortcut to exit fullscreen + * mode, you may suppress this behavior with + * `SDL_HINT_ALLOW_ALT_TAB_WHILE_GRABBED`. + * + * If the caller enables a grab while another window is currently grabbed, the + * other window loses its grab in favor of the caller's window. + * + * \param window The window for which the keyboard grab mode should be set. + * \param grabbed This is SDL_TRUE to grab keyboard, and SDL_FALSE to release. + * + * \since This function is available since SDL 2.0.16. + * + * \sa SDL_GetWindowKeyboardGrab + * \sa SDL_SetWindowMouseGrab + * \sa SDL_SetWindowGrab + */ +extern DECLSPEC void SDLCALL SDL_SetWindowKeyboardGrab(SDL_Window * window, + SDL_bool grabbed); + +/** + * Set a window's mouse grab mode. + * + * Mouse grab confines the mouse cursor to the window. + * + * \param window The window for which the mouse grab mode should be set. + * \param grabbed This is SDL_TRUE to grab mouse, and SDL_FALSE to release. + * + * \since This function is available since SDL 2.0.16. + * + * \sa SDL_GetWindowMouseGrab + * \sa SDL_SetWindowKeyboardGrab + * \sa SDL_SetWindowGrab + */ +extern DECLSPEC void SDLCALL SDL_SetWindowMouseGrab(SDL_Window * window, + SDL_bool grabbed); + +/** + * Get a window's input grab mode. + * + * \param window the window to query + * \returns SDL_TRUE if input is grabbed, SDL_FALSE otherwise. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetWindowGrab + */ +extern DECLSPEC SDL_bool SDLCALL SDL_GetWindowGrab(SDL_Window * window); + +/** + * Get a window's keyboard grab mode. + * + * \param window the window to query + * \returns SDL_TRUE if keyboard is grabbed, and SDL_FALSE otherwise. + * + * \since This function is available since SDL 2.0.16. + * + * \sa SDL_SetWindowKeyboardGrab + * \sa SDL_GetWindowGrab + */ +extern DECLSPEC SDL_bool SDLCALL SDL_GetWindowKeyboardGrab(SDL_Window * window); + +/** + * Get a window's mouse grab mode. + * + * \param window the window to query + * \returns SDL_TRUE if mouse is grabbed, and SDL_FALSE otherwise. + * + * \since This function is available since SDL 2.0.16. + * + * \sa SDL_SetWindowKeyboardGrab + * \sa SDL_GetWindowGrab + */ +extern DECLSPEC SDL_bool SDLCALL SDL_GetWindowMouseGrab(SDL_Window * window); + +/** + * Get the window that currently has an input grab enabled. + * + * \returns the window if input is grabbed or NULL otherwise. + * + * \since This function is available since SDL 2.0.4. + * + * \sa SDL_GetWindowGrab + * \sa SDL_SetWindowGrab + */ +extern DECLSPEC SDL_Window * SDLCALL SDL_GetGrabbedWindow(void); + +/** + * Confines the cursor to the specified area of a window. + * + * Note that this does NOT grab the cursor, it only defines the area a cursor + * is restricted to when the window has mouse focus. + * + * \param window The window that will be associated with the barrier. + * \param rect A rectangle area in window-relative coordinates. If NULL the + * barrier for the specified window will be destroyed. + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.18. + * + * \sa SDL_GetWindowMouseRect + * \sa SDL_SetWindowMouseGrab + */ +extern DECLSPEC int SDLCALL SDL_SetWindowMouseRect(SDL_Window * window, const SDL_Rect * rect); + +/** + * Get the mouse confinement rectangle of a window. + * + * \param window The window to query + * \returns A pointer to the mouse confinement rectangle of a window, or NULL + * if there isn't one. + * + * \since This function is available since SDL 2.0.18. + * + * \sa SDL_SetWindowMouseRect + */ +extern DECLSPEC const SDL_Rect * SDLCALL SDL_GetWindowMouseRect(SDL_Window * window); + +/** + * Set the brightness (gamma multiplier) for a given window's display. + * + * Despite the name and signature, this method sets the brightness of the + * entire display, not an individual window. A window is considered to be + * owned by the display that contains the window's center pixel. (The index of + * this display can be retrieved using SDL_GetWindowDisplayIndex().) The + * brightness set will not follow the window if it is moved to another + * display. + * + * Many platforms will refuse to set the display brightness in modern times. + * You are better off using a shader to adjust gamma during rendering, or + * something similar. + * + * \param window the window used to select the display whose brightness will + * be changed + * \param brightness the brightness (gamma multiplier) value to set where 0.0 + * is completely dark and 1.0 is normal brightness + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowBrightness + * \sa SDL_SetWindowGammaRamp + */ +extern DECLSPEC int SDLCALL SDL_SetWindowBrightness(SDL_Window * window, float brightness); + +/** + * Get the brightness (gamma multiplier) for a given window's display. + * + * Despite the name and signature, this method retrieves the brightness of the + * entire display, not an individual window. A window is considered to be + * owned by the display that contains the window's center pixel. (The index of + * this display can be retrieved using SDL_GetWindowDisplayIndex().) + * + * \param window the window used to select the display whose brightness will + * be queried + * \returns the brightness for the display where 0.0 is completely dark and + * 1.0 is normal brightness. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetWindowBrightness + */ +extern DECLSPEC float SDLCALL SDL_GetWindowBrightness(SDL_Window * window); + +/** + * Set the opacity for a window. + * + * The parameter `opacity` will be clamped internally between 0.0f + * (transparent) and 1.0f (opaque). + * + * This function also returns -1 if setting the opacity isn't supported. + * + * \param window the window which will be made transparent or opaque + * \param opacity the opacity value (0.0f - transparent, 1.0f - opaque) + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.5. + * + * \sa SDL_GetWindowOpacity + */ +extern DECLSPEC int SDLCALL SDL_SetWindowOpacity(SDL_Window * window, float opacity); + +/** + * Get the opacity of a window. + * + * If transparency isn't supported on this platform, opacity will be reported + * as 1.0f without error. + * + * The parameter `opacity` is ignored if it is NULL. + * + * This function also returns -1 if an invalid window was provided. + * + * \param window the window to get the current opacity value from + * \param out_opacity the float filled in (0.0f - transparent, 1.0f - opaque) + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.5. + * + * \sa SDL_SetWindowOpacity + */ +extern DECLSPEC int SDLCALL SDL_GetWindowOpacity(SDL_Window * window, float * out_opacity); + +/** + * Set the window as a modal for another window. + * + * \param modal_window the window that should be set modal + * \param parent_window the parent window for the modal window + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.5. + */ +extern DECLSPEC int SDLCALL SDL_SetWindowModalFor(SDL_Window * modal_window, SDL_Window * parent_window); + +/** + * Explicitly set input focus to the window. + * + * You almost certainly want SDL_RaiseWindow() instead of this function. Use + * this with caution, as you might give focus to a window that is completely + * obscured by other windows. + * + * \param window the window that should get the input focus + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.5. + * + * \sa SDL_RaiseWindow + */ +extern DECLSPEC int SDLCALL SDL_SetWindowInputFocus(SDL_Window * window); + +/** + * Set the gamma ramp for the display that owns a given window. + * + * 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. + * + * Despite the name and signature, this method sets the gamma ramp of the + * entire display, not an individual window. A window is considered to be + * owned by the display that contains the window's center pixel. (The index of + * this display can be retrieved using SDL_GetWindowDisplayIndex().) The gamma + * ramp set will not follow the window if it is moved to another display. + * + * \param window the window used to select the display whose gamma ramp will + * be changed + * \param red a 256 element array of 16-bit quantities representing the + * translation table for the red channel, or NULL + * \param green a 256 element array of 16-bit quantities representing the + * translation table for the green channel, or NULL + * \param blue a 256 element array of 16-bit quantities representing the + * translation table for the blue channel, or NULL + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GetWindowGammaRamp + */ +extern DECLSPEC int SDLCALL SDL_SetWindowGammaRamp(SDL_Window * window, + const Uint16 * red, + const Uint16 * green, + const Uint16 * blue); + +/** + * Get the gamma ramp for a given window's display. + * + * Despite the name and signature, this method retrieves the gamma ramp of the + * entire display, not an individual window. A window is considered to be + * owned by the display that contains the window's center pixel. (The index of + * this display can be retrieved using SDL_GetWindowDisplayIndex().) + * + * \param window the window used to select the display whose gamma ramp will + * be queried + * \param red a 256 element array of 16-bit quantities filled in with the + * translation table for the red channel, or NULL + * \param green a 256 element array of 16-bit quantities filled in with the + * translation table for the green channel, or NULL + * \param blue a 256 element array of 16-bit quantities filled in with the + * translation table for the blue channel, or NULL + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetWindowGammaRamp + */ +extern DECLSPEC int SDLCALL SDL_GetWindowGammaRamp(SDL_Window * window, + Uint16 * red, + Uint16 * green, + Uint16 * blue); + +/** + * Possible return values from the SDL_HitTest callback. + * + * \sa SDL_HitTest + */ +typedef enum +{ + SDL_HITTEST_NORMAL, /**< Region is normal. No special properties. */ + SDL_HITTEST_DRAGGABLE, /**< Region can drag entire window. */ + SDL_HITTEST_RESIZE_TOPLEFT, + SDL_HITTEST_RESIZE_TOP, + SDL_HITTEST_RESIZE_TOPRIGHT, + SDL_HITTEST_RESIZE_RIGHT, + SDL_HITTEST_RESIZE_BOTTOMRIGHT, + SDL_HITTEST_RESIZE_BOTTOM, + SDL_HITTEST_RESIZE_BOTTOMLEFT, + SDL_HITTEST_RESIZE_LEFT +} SDL_HitTestResult; + +/** + * Callback used for hit-testing. + * + * \param win the SDL_Window where hit-testing was set on + * \param area an SDL_Point which should be hit-tested + * \param data what was passed as `callback_data` to SDL_SetWindowHitTest() + * \return an SDL_HitTestResult value. + * + * \sa SDL_SetWindowHitTest + */ +typedef SDL_HitTestResult (SDLCALL *SDL_HitTest)(SDL_Window *win, + const SDL_Point *area, + void *data); + +/** + * Provide a callback that decides if a window region has special properties. + * + * Normally windows are dragged and resized by decorations provided by the + * system window manager (a title bar, borders, etc), but for some apps, it + * makes sense to drag them from somewhere else inside the window itself; for + * example, one might have a borderless window that wants to be draggable from + * any part, or simulate its own title bar, etc. + * + * This function lets the app provide a callback that designates pieces of a + * given window as special. This callback is run during event processing if we + * need to tell the OS to treat a region of the window specially; the use of + * this callback is known as "hit testing." + * + * Mouse input may not be delivered to your application if it is within a + * special area; the OS will often apply that input to moving the window or + * resizing the window and not deliver it to the application. + * + * Specifying NULL for a callback disables hit-testing. Hit-testing is + * disabled by default. + * + * Platforms that don't support this functionality will return -1 + * unconditionally, even if you're attempting to disable hit-testing. + * + * Your callback may fire at any time, and its firing does not indicate any + * specific behavior (for example, on Windows, this certainly might fire when + * the OS is deciding whether to drag your window, but it fires for lots of + * other reasons, too, some unrelated to anything you probably care about _and + * when the mouse isn't actually at the location it is testing_). Since this + * can fire at any time, you should try to keep your callback efficient, + * devoid of allocations, etc. + * + * \param window the window to set hit-testing on + * \param callback the function to call when doing a hit-test + * \param callback_data an app-defined void pointer passed to **callback** + * \returns 0 on success or -1 on error (including unsupported); call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.4. + */ +extern DECLSPEC int SDLCALL SDL_SetWindowHitTest(SDL_Window * window, + SDL_HitTest callback, + void *callback_data); + +/** + * Request a window to demand attention from the user. + * + * \param window the window to be flashed + * \param operation the flash operation + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.16. + */ +extern DECLSPEC int SDLCALL SDL_FlashWindow(SDL_Window * window, SDL_FlashOperation operation); + +/** + * Destroy a window. + * + * If `window` is NULL, this function will return immediately after setting + * the SDL error message to "Invalid window". See SDL_GetError(). + * + * \param window the window to destroy + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_CreateWindow + * \sa SDL_CreateWindowFrom + */ +extern DECLSPEC void SDLCALL SDL_DestroyWindow(SDL_Window * window); + + +/** + * Check whether the screensaver is currently enabled. + * + * The screensaver is disabled by default since SDL 2.0.2. Before SDL 2.0.2 + * the screensaver was enabled by default. + * + * The default can also be changed using `SDL_HINT_VIDEO_ALLOW_SCREENSAVER`. + * + * \returns SDL_TRUE if the screensaver is enabled, SDL_FALSE if it is + * disabled. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_DisableScreenSaver + * \sa SDL_EnableScreenSaver + */ +extern DECLSPEC SDL_bool SDLCALL SDL_IsScreenSaverEnabled(void); + +/** + * Allow the screen to be blanked by a screen saver. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_DisableScreenSaver + * \sa SDL_IsScreenSaverEnabled + */ +extern DECLSPEC void SDLCALL SDL_EnableScreenSaver(void); + +/** + * Prevent the screen from being blanked by a screen saver. + * + * If you disable the screensaver, it is automatically re-enabled when SDL + * quits. + * + * The screensaver is disabled by default since SDL 2.0.2. Before SDL 2.0.2 + * the screensaver was enabled by default. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_EnableScreenSaver + * \sa SDL_IsScreenSaverEnabled + */ +extern DECLSPEC void SDLCALL SDL_DisableScreenSaver(void); + + +/** + * \name OpenGL support functions + */ +/* @{ */ + +/** + * Dynamically load an OpenGL library. + * + * 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. + * + * 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(). + * + * \param path the platform dependent OpenGL library name, or NULL to open the + * default OpenGL library + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_GetProcAddress + * \sa SDL_GL_UnloadLibrary + */ +extern DECLSPEC int SDLCALL SDL_GL_LoadLibrary(const char *path); + +/** + * Get an OpenGL function by name. + * + * If the GL library is loaded at runtime with SDL_GL_LoadLibrary(), then all + * GL functions must be retrieved this way. Usually this is used to retrieve + * function pointers to OpenGL extensions. + * + * There are some quirks to looking up OpenGL functions that require some + * extra care from the application. If you code carefully, you can handle + * these quirks without any platform-specific code, though: + * + * - On Windows, function pointers are specific to the current GL context; + * this means you need to have created a GL context and made it current + * before calling SDL_GL_GetProcAddress(). If you recreate your context or + * create a second context, you should assume that any existing function + * pointers aren't valid to use with it. This is (currently) a + * Windows-specific limitation, and in practice lots of drivers don't suffer + * this limitation, but it is still the way the wgl API is documented to + * work and you should expect crashes if you don't respect it. Store a copy + * of the function pointers that comes and goes with context lifespan. + * - On X11, function pointers returned by this function are valid for any + * context, and can even be looked up before a context is created at all. + * This means that, for at least some common OpenGL implementations, if you + * look up a function that doesn't exist, you'll get a non-NULL result that + * is _NOT_ safe to call. You must always make sure the function is actually + * available for a given GL context before calling it, by checking for the + * existence of the appropriate extension with SDL_GL_ExtensionSupported(), + * or verifying that the version of OpenGL you're using offers the function + * as core functionality. + * - Some OpenGL drivers, on all platforms, *will* return NULL if a function + * isn't supported, but you can't count on this behavior. Check for + * extensions you use, and if you get a NULL anyway, act as if that + * extension wasn't available. This is probably a bug in the driver, but you + * can code defensively for this scenario anyhow. + * - Just because you're on Linux/Unix, don't assume you'll be using X11. + * Next-gen display servers are waiting to replace it, and may or may not + * make the same promises about function pointers. + * - OpenGL function pointers must be declared `APIENTRY` as in the example + * code. This will ensure the proper calling convention is followed on + * platforms where this matters (Win32) thereby avoiding stack corruption. + * + * \param proc the name of an OpenGL function + * \returns a pointer to the named OpenGL function. The returned pointer + * should be cast to the appropriate function signature. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_ExtensionSupported + * \sa SDL_GL_LoadLibrary + * \sa SDL_GL_UnloadLibrary + */ +extern DECLSPEC void *SDLCALL SDL_GL_GetProcAddress(const char *proc); + +/** + * Unload the OpenGL library previously loaded by SDL_GL_LoadLibrary(). + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_LoadLibrary + */ +extern DECLSPEC void SDLCALL SDL_GL_UnloadLibrary(void); + +/** + * Check if an OpenGL extension is supported for the current context. + * + * This function operates on the current GL context; you must have created a + * context and it must be current before calling this function. Do not assume + * that all contexts you create will have the same set of extensions + * available, or that recreating an existing context will offer the same + * extensions again. + * + * While it's probably not a massive overhead, this function is not an O(1) + * operation. Check the extensions you care about after creating the GL + * context and save that information somewhere instead of calling the function + * every time you need to know. + * + * \param extension the name of the extension to check + * \returns SDL_TRUE if the extension is supported, SDL_FALSE otherwise. + * + * \since This function is available since SDL 2.0.0. + */ +extern DECLSPEC SDL_bool SDLCALL SDL_GL_ExtensionSupported(const char + *extension); + +/** + * Reset all previously set OpenGL context attributes to their default values. + * + * \since This function is available since SDL 2.0.2. + * + * \sa SDL_GL_GetAttribute + * \sa SDL_GL_SetAttribute + */ +extern DECLSPEC void SDLCALL SDL_GL_ResetAttributes(void); + +/** + * Set an OpenGL window attribute before window creation. + * + * This function sets the OpenGL attribute `attr` to `value`. The requested + * attributes should be set before creating an OpenGL window. You should use + * SDL_GL_GetAttribute() to check the values after creating the OpenGL + * context, since the values obtained can differ from the requested ones. + * + * \param attr an SDL_GLattr enum value specifying the OpenGL attribute to set + * \param value the desired value for the attribute + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_GetAttribute + * \sa SDL_GL_ResetAttributes + */ +extern DECLSPEC int SDLCALL SDL_GL_SetAttribute(SDL_GLattr attr, int value); + +/** + * Get the actual value for an attribute from the current context. + * + * \param attr an SDL_GLattr enum value specifying the OpenGL attribute to get + * \param value a pointer filled in with the current value of `attr` + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_ResetAttributes + * \sa SDL_GL_SetAttribute + */ +extern DECLSPEC int SDLCALL SDL_GL_GetAttribute(SDL_GLattr attr, int *value); + +/** + * Create an OpenGL context for an OpenGL window, and make it current. + * + * Windows users new to OpenGL should note that, for historical reasons, GL + * functions added after OpenGL version 1.1 are not available by default. + * Those functions must be loaded at run-time, either with an OpenGL + * extension-handling library or with SDL_GL_GetProcAddress() and its related + * functions. + * + * SDL_GLContext is an alias for `void *`. It's opaque to the application. + * + * \param window the window to associate with the context + * \returns the OpenGL context associated with `window` or NULL on error; call + * SDL_GetError() for more details. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_DeleteContext + * \sa SDL_GL_MakeCurrent + */ +extern DECLSPEC SDL_GLContext SDLCALL SDL_GL_CreateContext(SDL_Window * + window); + +/** + * Set up an OpenGL context for rendering into an OpenGL window. + * + * The context must have been created with a compatible window. + * + * \param window the window to associate with the context + * \param context the OpenGL context to associate with the window + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_CreateContext + */ +extern DECLSPEC int SDLCALL SDL_GL_MakeCurrent(SDL_Window * window, + SDL_GLContext context); + +/** + * Get the currently active OpenGL window. + * + * \returns the currently active OpenGL window on success or NULL on failure; + * call SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + */ +extern DECLSPEC SDL_Window* SDLCALL SDL_GL_GetCurrentWindow(void); + +/** + * Get the currently active OpenGL context. + * + * \returns the currently active OpenGL context or NULL on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_MakeCurrent + */ +extern DECLSPEC SDL_GLContext SDLCALL SDL_GL_GetCurrentContext(void); + +/** + * Get the size of a window's underlying drawable in pixels. + * + * This returns info useful for calling glViewport(). + * + * This may differ from SDL_GetWindowSize() if we're rendering to a high-DPI + * drawable, i.e. the window was created with `SDL_WINDOW_ALLOW_HIGHDPI` on a + * platform with high-DPI support (Apple calls this "Retina"), and not + * disabled by the `SDL_HINT_VIDEO_HIGHDPI_DISABLED` hint. + * + * \param window the window from which the drawable size should be queried + * \param w a pointer to variable for storing the width in pixels, may be NULL + * \param h a pointer to variable for storing the height in pixels, may be + * NULL + * + * \since This function is available since SDL 2.0.1. + * + * \sa SDL_CreateWindow + * \sa SDL_GetWindowSize + */ +extern DECLSPEC void SDLCALL SDL_GL_GetDrawableSize(SDL_Window * window, int *w, + int *h); + +/** + * Set the swap interval for the current OpenGL context. + * + * Some systems allow specifying -1 for the interval, to enable adaptive + * vsync. Adaptive vsync works the same as vsync, but if you've already missed + * the vertical retrace for a given frame, it swaps buffers immediately, which + * might be less jarring for the user during occasional framerate drops. If an + * application requests adaptive vsync and the system does not support it, + * this function will fail and return -1. In such a case, you should probably + * retry the call with 1 for the interval. + * + * Adaptive vsync is implemented for some glX drivers with + * GLX_EXT_swap_control_tear, and for some Windows drivers with + * WGL_EXT_swap_control_tear. + * + * Read more on the Khronos wiki: + * https://www.khronos.org/opengl/wiki/Swap_Interval#Adaptive_Vsync + * + * \param interval 0 for immediate updates, 1 for updates synchronized with + * the vertical retrace, -1 for adaptive vsync + * \returns 0 on success or -1 if setting the swap interval is not supported; + * call SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_GetSwapInterval + */ +extern DECLSPEC int SDLCALL SDL_GL_SetSwapInterval(int interval); + +/** + * Get the swap interval for the current OpenGL context. + * + * If the system can't determine the swap interval, or there isn't a valid + * current context, this function will return 0 as a safe default. + * + * \returns 0 if there is no vertical retrace synchronization, 1 if the buffer + * swap is synchronized with the vertical retrace, and -1 if late + * swaps happen immediately instead of waiting for the next retrace; + * call SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_SetSwapInterval + */ +extern DECLSPEC int SDLCALL SDL_GL_GetSwapInterval(void); + +/** + * Update a window with OpenGL rendering. + * + * This is used with double-buffered OpenGL contexts, which are the default. + * + * On macOS, make sure you bind 0 to the draw framebuffer before swapping the + * window, otherwise nothing will happen. If you aren't using + * glBindFramebuffer(), this is the default and you won't have to do anything + * extra. + * + * \param window the window to change + * + * \since This function is available since SDL 2.0.0. + */ +extern DECLSPEC void SDLCALL SDL_GL_SwapWindow(SDL_Window * window); + +/** + * Delete an OpenGL context. + * + * \param context the OpenGL context to be deleted + * + * \since This function is available since SDL 2.0.0. + * + * \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 +} +#endif +#include "close_code.h" + +#endif /* SDL_video_h_ */ + +/* vi: set ts=4 sw=4 expandtab: */ |