1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20*/
21
22/**
23 * \file SDL_video.h
24 *
25 * Header file for SDL video functions.
26 */
27
28#ifndef SDL_video_h_
29#define SDL_video_h_
30
31#include "SDL_stdinc.h"
32#include "SDL_pixels.h"
33#include "SDL_rect.h"
34#include "SDL_surface.h"
35
36#include "begin_code.h"
37/* Set up for C function definitions, even when using C++ */
38#ifdef __cplusplus
39extern "C" {
40#endif
41
42/**
43 * \brief The structure that defines a display mode
44 *
45 * \sa SDL_GetNumDisplayModes()
46 * \sa SDL_GetDisplayMode()
47 * \sa SDL_GetDesktopDisplayMode()
48 * \sa SDL_GetCurrentDisplayMode()
49 * \sa SDL_GetClosestDisplayMode()
50 * \sa SDL_SetWindowDisplayMode()
51 * \sa SDL_GetWindowDisplayMode()
52 */
53typedef struct
54{
55 Uint32 format; /**< pixel format */
56 int w; /**< width, in screen coordinates */
57 int h; /**< height, in screen coordinates */
58 int refresh_rate; /**< refresh rate (or zero for unspecified) */
59 void *driverdata; /**< driver-specific data, initialize to 0 */
60} SDL_DisplayMode;
61
62/**
63 * \brief The type used to identify a window
64 *
65 * \sa SDL_CreateWindow()
66 * \sa SDL_CreateWindowFrom()
67 * \sa SDL_DestroyWindow()
68 * \sa SDL_GetWindowData()
69 * \sa SDL_GetWindowFlags()
70 * \sa SDL_GetWindowGrab()
71 * \sa SDL_GetWindowPosition()
72 * \sa SDL_GetWindowSize()
73 * \sa SDL_GetWindowTitle()
74 * \sa SDL_HideWindow()
75 * \sa SDL_MaximizeWindow()
76 * \sa SDL_MinimizeWindow()
77 * \sa SDL_RaiseWindow()
78 * \sa SDL_RestoreWindow()
79 * \sa SDL_SetWindowData()
80 * \sa SDL_SetWindowFullscreen()
81 * \sa SDL_SetWindowGrab()
82 * \sa SDL_SetWindowIcon()
83 * \sa SDL_SetWindowPosition()
84 * \sa SDL_SetWindowSize()
85 * \sa SDL_SetWindowBordered()
86 * \sa SDL_SetWindowResizable()
87 * \sa SDL_SetWindowTitle()
88 * \sa SDL_ShowWindow()
89 */
90typedef struct SDL_Window SDL_Window;
91
92/**
93 * \brief The flags on a window
94 *
95 * \sa SDL_GetWindowFlags()
96 */
97typedef enum
98{
99 /* !!! FIXME: change this to name = (1<<x). */
100 SDL_WINDOW_FULLSCREEN = 0x00000001, /**< fullscreen window */
101 SDL_WINDOW_OPENGL = 0x00000002, /**< window usable with OpenGL context */
102 SDL_WINDOW_SHOWN = 0x00000004, /**< window is visible */
103 SDL_WINDOW_HIDDEN = 0x00000008, /**< window is not visible */
104 SDL_WINDOW_BORDERLESS = 0x00000010, /**< no window decoration */
105 SDL_WINDOW_RESIZABLE = 0x00000020, /**< window can be resized */
106 SDL_WINDOW_MINIMIZED = 0x00000040, /**< window is minimized */
107 SDL_WINDOW_MAXIMIZED = 0x00000080, /**< window is maximized */
108 SDL_WINDOW_INPUT_GRABBED = 0x00000100, /**< window has grabbed input focus */
109 SDL_WINDOW_INPUT_FOCUS = 0x00000200, /**< window has input focus */
110 SDL_WINDOW_MOUSE_FOCUS = 0x00000400, /**< window has mouse focus */
111 SDL_WINDOW_FULLSCREEN_DESKTOP = ( SDL_WINDOW_FULLSCREEN | 0x00001000 ),
112 SDL_WINDOW_FOREIGN = 0x00000800, /**< window not created by SDL */
113 SDL_WINDOW_ALLOW_HIGHDPI = 0x00002000, /**< window should be created in high-DPI mode if supported.
114 On macOS NSHighResolutionCapable must be set true in the
115 application's Info.plist for this to have any effect. */
116 SDL_WINDOW_MOUSE_CAPTURE = 0x00004000, /**< window has mouse captured (unrelated to INPUT_GRABBED) */
117 SDL_WINDOW_ALWAYS_ON_TOP = 0x00008000, /**< window should always be above others */
118 SDL_WINDOW_SKIP_TASKBAR = 0x00010000, /**< window should not be added to the taskbar */
119 SDL_WINDOW_UTILITY = 0x00020000, /**< window should be treated as a utility window */
120 SDL_WINDOW_TOOLTIP = 0x00040000, /**< window should be treated as a tooltip */
121 SDL_WINDOW_POPUP_MENU = 0x00080000, /**< window should be treated as a popup menu */
122 SDL_WINDOW_VULKAN = 0x10000000 /**< window usable for Vulkan surface */
123} SDL_WindowFlags;
124
125/**
126 * \brief Used to indicate that you don't care what the window position is.
127 */
128#define SDL_WINDOWPOS_UNDEFINED_MASK 0x1FFF0000u
129#define SDL_WINDOWPOS_UNDEFINED_DISPLAY(X) (SDL_WINDOWPOS_UNDEFINED_MASK|(X))
130#define SDL_WINDOWPOS_UNDEFINED SDL_WINDOWPOS_UNDEFINED_DISPLAY(0)
131#define SDL_WINDOWPOS_ISUNDEFINED(X) \
132 (((X)&0xFFFF0000) == SDL_WINDOWPOS_UNDEFINED_MASK)
133
134/**
135 * \brief Used to indicate that the window position should be centered.
136 */
137#define SDL_WINDOWPOS_CENTERED_MASK 0x2FFF0000u
138#define SDL_WINDOWPOS_CENTERED_DISPLAY(X) (SDL_WINDOWPOS_CENTERED_MASK|(X))
139#define SDL_WINDOWPOS_CENTERED SDL_WINDOWPOS_CENTERED_DISPLAY(0)
140#define SDL_WINDOWPOS_ISCENTERED(X) \
141 (((X)&0xFFFF0000) == SDL_WINDOWPOS_CENTERED_MASK)
142
143/**
144 * \brief Event subtype for window events
145 */
146typedef enum
147{
148 SDL_WINDOWEVENT_NONE, /**< Never used */
149 SDL_WINDOWEVENT_SHOWN, /**< Window has been shown */
150 SDL_WINDOWEVENT_HIDDEN, /**< Window has been hidden */
151 SDL_WINDOWEVENT_EXPOSED, /**< Window has been exposed and should be
152 redrawn */
153 SDL_WINDOWEVENT_MOVED, /**< Window has been moved to data1, data2
154 */
155 SDL_WINDOWEVENT_RESIZED, /**< Window has been resized to data1xdata2 */
156 SDL_WINDOWEVENT_SIZE_CHANGED, /**< The window size has changed, either as
157 a result of an API call or through the
158 system or user changing the window size. */
159 SDL_WINDOWEVENT_MINIMIZED, /**< Window has been minimized */
160 SDL_WINDOWEVENT_MAXIMIZED, /**< Window has been maximized */
161 SDL_WINDOWEVENT_RESTORED, /**< Window has been restored to normal size
162 and position */
163 SDL_WINDOWEVENT_ENTER, /**< Window has gained mouse focus */
164 SDL_WINDOWEVENT_LEAVE, /**< Window has lost mouse focus */
165 SDL_WINDOWEVENT_FOCUS_GAINED, /**< Window has gained keyboard focus */
166 SDL_WINDOWEVENT_FOCUS_LOST, /**< Window has lost keyboard focus */
167 SDL_WINDOWEVENT_CLOSE, /**< The window manager requests that the window be closed */
168 SDL_WINDOWEVENT_TAKE_FOCUS, /**< Window is being offered a focus (should SetWindowInputFocus() on itself or a subwindow, or ignore) */
169 SDL_WINDOWEVENT_HIT_TEST /**< Window had a hit test that wasn't SDL_HITTEST_NORMAL. */
170} SDL_WindowEventID;
171
172/**
173 * \brief Event subtype for display events
174 */
175typedef enum
176{
177 SDL_DISPLAYEVENT_NONE, /**< Never used */
178 SDL_DISPLAYEVENT_ORIENTATION /**< Display orientation has changed to data1 */
179} SDL_DisplayEventID;
180
181typedef enum
182{
183 SDL_ORIENTATION_UNKNOWN, /**< The display orientation can't be determined */
184 SDL_ORIENTATION_LANDSCAPE, /**< The display is in landscape mode, with the right side up, relative to portrait mode */
185 SDL_ORIENTATION_LANDSCAPE_FLIPPED, /**< The display is in landscape mode, with the left side up, relative to portrait mode */
186 SDL_ORIENTATION_PORTRAIT, /**< The display is in portrait mode */
187 SDL_ORIENTATION_PORTRAIT_FLIPPED /**< The display is in portrait mode, upside down */
188} SDL_DisplayOrientation;
189
190/**
191 * \brief An opaque handle to an OpenGL context.
192 */
193typedef void *SDL_GLContext;
194
195/**
196 * \brief OpenGL configuration attributes
197 */
198typedef enum
199{
200 SDL_GL_RED_SIZE,
201 SDL_GL_GREEN_SIZE,
202 SDL_GL_BLUE_SIZE,
203 SDL_GL_ALPHA_SIZE,
204 SDL_GL_BUFFER_SIZE,
205 SDL_GL_DOUBLEBUFFER,
206 SDL_GL_DEPTH_SIZE,
207 SDL_GL_STENCIL_SIZE,
208 SDL_GL_ACCUM_RED_SIZE,
209 SDL_GL_ACCUM_GREEN_SIZE,
210 SDL_GL_ACCUM_BLUE_SIZE,
211 SDL_GL_ACCUM_ALPHA_SIZE,
212 SDL_GL_STEREO,
213 SDL_GL_MULTISAMPLEBUFFERS,
214 SDL_GL_MULTISAMPLESAMPLES,
215 SDL_GL_ACCELERATED_VISUAL,
216 SDL_GL_RETAINED_BACKING,
217 SDL_GL_CONTEXT_MAJOR_VERSION,
218 SDL_GL_CONTEXT_MINOR_VERSION,
219 SDL_GL_CONTEXT_EGL,
220 SDL_GL_CONTEXT_FLAGS,
221 SDL_GL_CONTEXT_PROFILE_MASK,
222 SDL_GL_SHARE_WITH_CURRENT_CONTEXT,
223 SDL_GL_FRAMEBUFFER_SRGB_CAPABLE,
224 SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
225 SDL_GL_CONTEXT_RESET_NOTIFICATION,
226 SDL_GL_CONTEXT_NO_ERROR
227} SDL_GLattr;
228
229typedef enum
230{
231 SDL_GL_CONTEXT_PROFILE_CORE = 0x0001,
232 SDL_GL_CONTEXT_PROFILE_COMPATIBILITY = 0x0002,
233 SDL_GL_CONTEXT_PROFILE_ES = 0x0004 /**< GLX_CONTEXT_ES2_PROFILE_BIT_EXT */
234} SDL_GLprofile;
235
236typedef enum
237{
238 SDL_GL_CONTEXT_DEBUG_FLAG = 0x0001,
239 SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG = 0x0002,
240 SDL_GL_CONTEXT_ROBUST_ACCESS_FLAG = 0x0004,
241 SDL_GL_CONTEXT_RESET_ISOLATION_FLAG = 0x0008
242} SDL_GLcontextFlag;
243
244typedef enum
245{
246 SDL_GL_CONTEXT_RELEASE_BEHAVIOR_NONE = 0x0000,
247 SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH = 0x0001
248} SDL_GLcontextReleaseFlag;
249
250typedef enum
251{
252 SDL_GL_CONTEXT_RESET_NO_NOTIFICATION = 0x0000,
253 SDL_GL_CONTEXT_RESET_LOSE_CONTEXT = 0x0001
254} SDL_GLContextResetNotification;
255
256/* Function prototypes */
257
258/**
259 * \brief Get the number of video drivers compiled into SDL
260 *
261 * \sa SDL_GetVideoDriver()
262 */
263extern DECLSPEC int SDLCALL SDL_GetNumVideoDrivers(void);
264
265/**
266 * \brief Get the name of a built in video driver.
267 *
268 * \note The video drivers are presented in the order in which they are
269 * normally checked during initialization.
270 *
271 * \sa SDL_GetNumVideoDrivers()
272 */
273extern DECLSPEC const char *SDLCALL SDL_GetVideoDriver(int index);
274
275/**
276 * \brief Initialize the video subsystem, optionally specifying a video driver.
277 *
278 * \param driver_name Initialize a specific driver by name, or NULL for the
279 * default video driver.
280 *
281 * \return 0 on success, -1 on error
282 *
283 * This function initializes the video subsystem; setting up a connection
284 * to the window manager, etc, and determines the available display modes
285 * and pixel formats, but does not initialize a window or graphics mode.
286 *
287 * \sa SDL_VideoQuit()
288 */
289extern DECLSPEC int SDLCALL SDL_VideoInit(const char *driver_name);
290
291/**
292 * \brief Shuts down the video subsystem.
293 *
294 * This function closes all windows, and restores the original video mode.
295 *
296 * \sa SDL_VideoInit()
297 */
298extern DECLSPEC void SDLCALL SDL_VideoQuit(void);
299
300/**
301 * \brief Returns the name of the currently initialized video driver.
302 *
303 * \return The name of the current video driver or NULL if no driver
304 * has been initialized
305 *
306 * \sa SDL_GetNumVideoDrivers()
307 * \sa SDL_GetVideoDriver()
308 */
309extern DECLSPEC const char *SDLCALL SDL_GetCurrentVideoDriver(void);
310
311/**
312 * \brief Returns the number of available video displays.
313 *
314 * \sa SDL_GetDisplayBounds()
315 */
316extern DECLSPEC int SDLCALL SDL_GetNumVideoDisplays(void);
317
318/**
319 * \brief Get the name of a display in UTF-8 encoding
320 *
321 * \return The name of a display, or NULL for an invalid display index.
322 *
323 * \sa SDL_GetNumVideoDisplays()
324 */
325extern DECLSPEC const char * SDLCALL SDL_GetDisplayName(int displayIndex);
326
327/**
328 * \brief Get the desktop area represented by a display, with the primary
329 * display located at 0,0
330 *
331 * \return 0 on success, or -1 if the index is out of range.
332 *
333 * \sa SDL_GetNumVideoDisplays()
334 */
335extern DECLSPEC int SDLCALL SDL_GetDisplayBounds(int displayIndex, SDL_Rect * rect);
336
337/**
338 * \brief Get the usable desktop area represented by a display, with the
339 * primary display located at 0,0
340 *
341 * This is the same area as SDL_GetDisplayBounds() reports, but with portions
342 * reserved by the system removed. For example, on Mac OS X, this subtracts
343 * the area occupied by the menu bar and dock.
344 *
345 * Setting a window to be fullscreen generally bypasses these unusable areas,
346 * so these are good guidelines for the maximum space available to a
347 * non-fullscreen window.
348 *
349 * \return 0 on success, or -1 if the index is out of range.
350 *
351 * \sa SDL_GetDisplayBounds()
352 * \sa SDL_GetNumVideoDisplays()
353 */
354extern DECLSPEC int SDLCALL SDL_GetDisplayUsableBounds(int displayIndex, SDL_Rect * rect);
355
356/**
357 * \brief Get the dots/pixels-per-inch for a display
358 *
359 * \note Diagonal, horizontal and vertical DPI can all be optionally
360 * returned if the parameter is non-NULL.
361 *
362 * \return 0 on success, or -1 if no DPI information is available or the index is out of range.
363 *
364 * \sa SDL_GetNumVideoDisplays()
365 */
366extern DECLSPEC int SDLCALL SDL_GetDisplayDPI(int displayIndex, float * ddpi, float * hdpi, float * vdpi);
367
368/**
369 * \brief Get the orientation of a display
370 *
371 * \return The orientation of the display, or SDL_ORIENTATION_UNKNOWN if it isn't available.
372 *
373 * \sa SDL_GetNumVideoDisplays()
374 */
375extern DECLSPEC SDL_DisplayOrientation SDLCALL SDL_GetDisplayOrientation(int displayIndex);
376
377/**
378 * \brief Returns the number of available display modes.
379 *
380 * \sa SDL_GetDisplayMode()
381 */
382extern DECLSPEC int SDLCALL SDL_GetNumDisplayModes(int displayIndex);
383
384/**
385 * \brief Fill in information about a specific display mode.
386 *
387 * \note The display modes are sorted in this priority:
388 * \li bits per pixel -> more colors to fewer colors
389 * \li width -> largest to smallest
390 * \li height -> largest to smallest
391 * \li refresh rate -> highest to lowest
392 *
393 * \sa SDL_GetNumDisplayModes()
394 */
395extern DECLSPEC int SDLCALL SDL_GetDisplayMode(int displayIndex, int modeIndex,
396 SDL_DisplayMode * mode);
397
398/**
399 * \brief Fill in information about the desktop display mode.
400 */
401extern DECLSPEC int SDLCALL SDL_GetDesktopDisplayMode(int displayIndex, SDL_DisplayMode * mode);
402
403/**
404 * \brief Fill in information about the current display mode.
405 */
406extern DECLSPEC int SDLCALL SDL_GetCurrentDisplayMode(int displayIndex, SDL_DisplayMode * mode);
407
408
409/**
410 * \brief Get the closest match to the requested display mode.
411 *
412 * \param displayIndex The index of display from which mode should be queried.
413 * \param mode The desired display mode
414 * \param closest A pointer to a display mode to be filled in with the closest
415 * match of the available display modes.
416 *
417 * \return The passed in value \c closest, or NULL if no matching video mode
418 * was available.
419 *
420 * The available display modes are scanned, and \c closest is filled in with the
421 * closest mode matching the requested mode and returned. The mode format and
422 * refresh_rate default to the desktop mode if they are 0. The modes are
423 * scanned with size being first priority, format being second priority, and
424 * finally checking the refresh_rate. If all the available modes are too
425 * small, then NULL is returned.
426 *
427 * \sa SDL_GetNumDisplayModes()
428 * \sa SDL_GetDisplayMode()
429 */
430extern DECLSPEC SDL_DisplayMode * SDLCALL SDL_GetClosestDisplayMode(int displayIndex, const SDL_DisplayMode * mode, SDL_DisplayMode * closest);
431
432/**
433 * \brief Get the display index associated with a window.
434 *
435 * \return the display index of the display containing the center of the
436 * window, or -1 on error.
437 */
438extern DECLSPEC int SDLCALL SDL_GetWindowDisplayIndex(SDL_Window * window);
439
440/**
441 * \brief Set the display mode used when a fullscreen window is visible.
442 *
443 * By default the window's dimensions and the desktop format and refresh rate
444 * are used.
445 *
446 * \param window The window for which the display mode should be set.
447 * \param mode The mode to use, or NULL for the default mode.
448 *
449 * \return 0 on success, or -1 if setting the display mode failed.
450 *
451 * \sa SDL_GetWindowDisplayMode()
452 * \sa SDL_SetWindowFullscreen()
453 */
454extern DECLSPEC int SDLCALL SDL_SetWindowDisplayMode(SDL_Window * window,
455 const SDL_DisplayMode
456 * mode);
457
458/**
459 * \brief Fill in information about the display mode used when a fullscreen
460 * window is visible.
461 *
462 * \sa SDL_SetWindowDisplayMode()
463 * \sa SDL_SetWindowFullscreen()
464 */
465extern DECLSPEC int SDLCALL SDL_GetWindowDisplayMode(SDL_Window * window,
466 SDL_DisplayMode * mode);
467
468/**
469 * \brief Get the pixel format associated with the window.
470 */
471extern DECLSPEC Uint32 SDLCALL SDL_GetWindowPixelFormat(SDL_Window * window);
472
473/**
474 * \brief Create a window with the specified position, dimensions, and flags.
475 *
476 * \param title The title of the window, in UTF-8 encoding.
477 * \param x The x position of the window, ::SDL_WINDOWPOS_CENTERED, or
478 * ::SDL_WINDOWPOS_UNDEFINED.
479 * \param y The y position of the window, ::SDL_WINDOWPOS_CENTERED, or
480 * ::SDL_WINDOWPOS_UNDEFINED.
481 * \param w The width of the window, in screen coordinates.
482 * \param h The height of the window, in screen coordinates.
483 * \param flags The flags for the window, a mask of any of the following:
484 * ::SDL_WINDOW_FULLSCREEN, ::SDL_WINDOW_OPENGL,
485 * ::SDL_WINDOW_HIDDEN, ::SDL_WINDOW_BORDERLESS,
486 * ::SDL_WINDOW_RESIZABLE, ::SDL_WINDOW_MAXIMIZED,
487 * ::SDL_WINDOW_MINIMIZED, ::SDL_WINDOW_INPUT_GRABBED,
488 * ::SDL_WINDOW_ALLOW_HIGHDPI, ::SDL_WINDOW_VULKAN.
489 *
490 * \return The created window, or NULL if window creation failed.
491 *
492 * If the window is created with the SDL_WINDOW_ALLOW_HIGHDPI flag, its size
493 * in pixels may differ from its size in screen coordinates on platforms with
494 * high-DPI support (e.g. iOS and Mac OS X). Use SDL_GetWindowSize() to query
495 * the client area's size in screen coordinates, and SDL_GL_GetDrawableSize(),
496 * SDL_Vulkan_GetDrawableSize(), or SDL_GetRendererOutputSize() to query the
497 * drawable size in pixels.
498 *
499 * If the window is created with any of the SDL_WINDOW_OPENGL or
500 * SDL_WINDOW_VULKAN flags, then the corresponding LoadLibrary function
501 * (SDL_GL_LoadLibrary or SDL_Vulkan_LoadLibrary) is called and the
502 * corresponding UnloadLibrary function is called by SDL_DestroyWindow().
503 *
504 * If SDL_WINDOW_VULKAN is specified and there isn't a working Vulkan driver,
505 * SDL_CreateWindow() will fail because SDL_Vulkan_LoadLibrary() will fail.
506 *
507 * \note On non-Apple devices, SDL requires you to either not link to the
508 * Vulkan loader or link to a dynamic library version. This limitation
509 * may be removed in a future version of SDL.
510 *
511 * \sa SDL_DestroyWindow()
512 * \sa SDL_GL_LoadLibrary()
513 * \sa SDL_Vulkan_LoadLibrary()
514 */
515extern DECLSPEC SDL_Window * SDLCALL SDL_CreateWindow(const char *title,
516 int x, int y, int w,
517 int h, Uint32 flags);
518
519/**
520 * \brief Create an SDL window from an existing native window.
521 *
522 * \param data A pointer to driver-dependent window creation data
523 *
524 * \return The created window, or NULL if window creation failed.
525 *
526 * \sa SDL_DestroyWindow()
527 */
528extern DECLSPEC SDL_Window * SDLCALL SDL_CreateWindowFrom(const void *data);
529
530/**
531 * \brief Get the numeric ID of a window, for logging purposes.
532 */
533extern DECLSPEC Uint32 SDLCALL SDL_GetWindowID(SDL_Window * window);
534
535/**
536 * \brief Get a window from a stored ID, or NULL if it doesn't exist.
537 */
538extern DECLSPEC SDL_Window * SDLCALL SDL_GetWindowFromID(Uint32 id);
539
540/**
541 * \brief Get the window flags.
542 */
543extern DECLSPEC Uint32 SDLCALL SDL_GetWindowFlags(SDL_Window * window);
544
545/**
546 * \brief Set the title of a window, in UTF-8 format.
547 *
548 * \sa SDL_GetWindowTitle()
549 */
550extern DECLSPEC void SDLCALL SDL_SetWindowTitle(SDL_Window * window,
551 const char *title);
552
553/**
554 * \brief Get the title of a window, in UTF-8 format.
555 *
556 * \sa SDL_SetWindowTitle()
557 */
558extern DECLSPEC const char *SDLCALL SDL_GetWindowTitle(SDL_Window * window);
559
560/**
561 * \brief Set the icon for a window.
562 *
563 * \param window The window for which the icon should be set.
564 * \param icon The icon for the window.
565 */
566extern DECLSPEC void SDLCALL SDL_SetWindowIcon(SDL_Window * window,
567 SDL_Surface * icon);
568
569/**
570 * \brief Associate an arbitrary named pointer with a window.
571 *
572 * \param window The window to associate with the pointer.
573 * \param name The name of the pointer.
574 * \param userdata The associated pointer.
575 *
576 * \return The previous value associated with 'name'
577 *
578 * \note The name is case-sensitive.
579 *
580 * \sa SDL_GetWindowData()
581 */
582extern DECLSPEC void* SDLCALL SDL_SetWindowData(SDL_Window * window,
583 const char *name,
584 void *userdata);
585
586/**
587 * \brief Retrieve the data pointer associated with a window.
588 *
589 * \param window The window to query.
590 * \param name The name of the pointer.
591 *
592 * \return The value associated with 'name'
593 *
594 * \sa SDL_SetWindowData()
595 */
596extern DECLSPEC void *SDLCALL SDL_GetWindowData(SDL_Window * window,
597 const char *name);
598
599/**
600 * \brief Set the position of a window.
601 *
602 * \param window The window to reposition.
603 * \param x The x coordinate of the window in screen coordinates, or
604 * ::SDL_WINDOWPOS_CENTERED or ::SDL_WINDOWPOS_UNDEFINED.
605 * \param y The y coordinate of the window in screen coordinates, or
606 * ::SDL_WINDOWPOS_CENTERED or ::SDL_WINDOWPOS_UNDEFINED.
607 *
608 * \note The window coordinate origin is the upper left of the display.
609 *
610 * \sa SDL_GetWindowPosition()
611 */
612extern DECLSPEC void SDLCALL SDL_SetWindowPosition(SDL_Window * window,
613 int x, int y);
614
615/**
616 * \brief Get the position of a window.
617 *
618 * \param window The window to query.
619 * \param x Pointer to variable for storing the x position, in screen
620 * coordinates. May be NULL.
621 * \param y Pointer to variable for storing the y position, in screen
622 * coordinates. May be NULL.
623 *
624 * \sa SDL_SetWindowPosition()
625 */
626extern DECLSPEC void SDLCALL SDL_GetWindowPosition(SDL_Window * window,
627 int *x, int *y);
628
629/**
630 * \brief Set the size of a window's client area.
631 *
632 * \param window The window to resize.
633 * \param w The width of the window, in screen coordinates. Must be >0.
634 * \param h The height of the window, in screen coordinates. Must be >0.
635 *
636 * \note Fullscreen windows automatically match the size of the display mode,
637 * and you should use SDL_SetWindowDisplayMode() to change their size.
638 *
639 * The window size in screen coordinates may differ from the size in pixels, if
640 * the window was created with SDL_WINDOW_ALLOW_HIGHDPI on a platform with
641 * high-dpi support (e.g. iOS or OS X). Use SDL_GL_GetDrawableSize() or
642 * SDL_GetRendererOutputSize() to get the real client area size in pixels.
643 *
644 * \sa SDL_GetWindowSize()
645 * \sa SDL_SetWindowDisplayMode()
646 */
647extern DECLSPEC void SDLCALL SDL_SetWindowSize(SDL_Window * window, int w,
648 int h);
649
650/**
651 * \brief Get the size of a window's client area.
652 *
653 * \param window The window to query.
654 * \param w Pointer to variable for storing the width, in screen
655 * coordinates. May be NULL.
656 * \param h Pointer to variable for storing the height, in screen
657 * coordinates. May be NULL.
658 *
659 * The window size in screen coordinates may differ from the size in pixels, if
660 * the window was created with SDL_WINDOW_ALLOW_HIGHDPI on a platform with
661 * high-dpi support (e.g. iOS or OS X). Use SDL_GL_GetDrawableSize() or
662 * SDL_GetRendererOutputSize() to get the real client area size in pixels.
663 *
664 * \sa SDL_SetWindowSize()
665 */
666extern DECLSPEC void SDLCALL SDL_GetWindowSize(SDL_Window * window, int *w,
667 int *h);
668
669/**
670 * \brief Get the size of a window's borders (decorations) around the client area.
671 *
672 * \param window The window to query.
673 * \param top Pointer to variable for storing the size of the top border. NULL is permitted.
674 * \param left Pointer to variable for storing the size of the left border. NULL is permitted.
675 * \param bottom Pointer to variable for storing the size of the bottom border. NULL is permitted.
676 * \param right Pointer to variable for storing the size of the right border. NULL is permitted.
677 *
678 * \return 0 on success, or -1 if getting this information is not supported.
679 *
680 * \note if this function fails (returns -1), the size values will be
681 * initialized to 0, 0, 0, 0 (if a non-NULL pointer is provided), as
682 * if the window in question was borderless.
683 */
684extern DECLSPEC int SDLCALL SDL_GetWindowBordersSize(SDL_Window * window,
685 int *top, int *left,
686 int *bottom, int *right);
687
688/**
689 * \brief Set the minimum size of a window's client area.
690 *
691 * \param window The window to set a new minimum size.
692 * \param min_w The minimum width of the window, must be >0
693 * \param min_h The minimum height of the window, must be >0
694 *
695 * \note You can't change the minimum size of a fullscreen window, it
696 * automatically matches the size of the display mode.
697 *
698 * \sa SDL_GetWindowMinimumSize()
699 * \sa SDL_SetWindowMaximumSize()
700 */
701extern DECLSPEC void SDLCALL SDL_SetWindowMinimumSize(SDL_Window * window,
702 int min_w, int min_h);
703
704/**
705 * \brief Get the minimum size of a window's client area.
706 *
707 * \param window The window to query.
708 * \param w Pointer to variable for storing the minimum width, may be NULL
709 * \param h Pointer to variable for storing the minimum height, may be NULL
710 *
711 * \sa SDL_GetWindowMaximumSize()
712 * \sa SDL_SetWindowMinimumSize()
713 */
714extern DECLSPEC void SDLCALL SDL_GetWindowMinimumSize(SDL_Window * window,
715 int *w, int *h);
716
717/**
718 * \brief Set the maximum size of a window's client area.
719 *
720 * \param window The window to set a new maximum size.
721 * \param max_w The maximum width of the window, must be >0
722 * \param max_h The maximum height of the window, must be >0
723 *
724 * \note You can't change the maximum size of a fullscreen window, it
725 * automatically matches the size of the display mode.
726 *
727 * \sa SDL_GetWindowMaximumSize()
728 * \sa SDL_SetWindowMinimumSize()
729 */
730extern DECLSPEC void SDLCALL SDL_SetWindowMaximumSize(SDL_Window * window,
731 int max_w, int max_h);
732
733/**
734 * \brief Get the maximum size of a window's client area.
735 *
736 * \param window The window to query.
737 * \param w Pointer to variable for storing the maximum width, may be NULL
738 * \param h Pointer to variable for storing the maximum height, may be NULL
739 *
740 * \sa SDL_GetWindowMinimumSize()
741 * \sa SDL_SetWindowMaximumSize()
742 */
743extern DECLSPEC void SDLCALL SDL_GetWindowMaximumSize(SDL_Window * window,
744 int *w, int *h);
745
746/**
747 * \brief Set the border state of a window.
748 *
749 * This will add or remove the window's SDL_WINDOW_BORDERLESS flag and
750 * add or remove the border from the actual window. This is a no-op if the
751 * window's border already matches the requested state.
752 *
753 * \param window The window of which to change the border state.
754 * \param bordered SDL_FALSE to remove border, SDL_TRUE to add border.
755 *
756 * \note You can't change the border state of a fullscreen window.
757 *
758 * \sa SDL_GetWindowFlags()
759 */
760extern DECLSPEC void SDLCALL SDL_SetWindowBordered(SDL_Window * window,
761 SDL_bool bordered);
762
763/**
764 * \brief Set the user-resizable state of a window.
765 *
766 * This will add or remove the window's SDL_WINDOW_RESIZABLE flag and
767 * allow/disallow user resizing of the window. This is a no-op if the
768 * window's resizable state already matches the requested state.
769 *
770 * \param window The window of which to change the resizable state.
771 * \param resizable SDL_TRUE to allow resizing, SDL_FALSE to disallow.
772 *
773 * \note You can't change the resizable state of a fullscreen window.
774 *
775 * \sa SDL_GetWindowFlags()
776 */
777extern DECLSPEC void SDLCALL SDL_SetWindowResizable(SDL_Window * window,
778 SDL_bool resizable);
779
780/**
781 * \brief Show a window.
782 *
783 * \sa SDL_HideWindow()
784 */
785extern DECLSPEC void SDLCALL SDL_ShowWindow(SDL_Window * window);
786
787/**
788 * \brief Hide a window.
789 *
790 * \sa SDL_ShowWindow()
791 */
792extern DECLSPEC void SDLCALL SDL_HideWindow(SDL_Window * window);
793
794/**
795 * \brief Raise a window above other windows and set the input focus.
796 */
797extern DECLSPEC void SDLCALL SDL_RaiseWindow(SDL_Window * window);
798
799/**
800 * \brief Make a window as large as possible.
801 *
802 * \sa SDL_RestoreWindow()
803 */
804extern DECLSPEC void SDLCALL SDL_MaximizeWindow(SDL_Window * window);
805
806/**
807 * \brief Minimize a window to an iconic representation.
808 *
809 * \sa SDL_RestoreWindow()
810 */
811extern DECLSPEC void SDLCALL SDL_MinimizeWindow(SDL_Window * window);
812
813/**
814 * \brief Restore the size and position of a minimized or maximized window.
815 *
816 * \sa SDL_MaximizeWindow()
817 * \sa SDL_MinimizeWindow()
818 */
819extern DECLSPEC void SDLCALL SDL_RestoreWindow(SDL_Window * window);
820
821/**
822 * \brief Set a window's fullscreen state.
823 *
824 * \return 0 on success, or -1 if setting the display mode failed.
825 *
826 * \sa SDL_SetWindowDisplayMode()
827 * \sa SDL_GetWindowDisplayMode()
828 */
829extern DECLSPEC int SDLCALL SDL_SetWindowFullscreen(SDL_Window * window,
830 Uint32 flags);
831
832/**
833 * \brief Get the SDL surface associated with the window.
834 *
835 * \return The window's framebuffer surface, or NULL on error.
836 *
837 * A new surface will be created with the optimal format for the window,
838 * if necessary. This surface will be freed when the window is destroyed.
839 *
840 * \note You may not combine this with 3D or the rendering API on this window.
841 *
842 * \sa SDL_UpdateWindowSurface()
843 * \sa SDL_UpdateWindowSurfaceRects()
844 */
845extern DECLSPEC SDL_Surface * SDLCALL SDL_GetWindowSurface(SDL_Window * window);
846
847/**
848 * \brief Copy the window surface to the screen.
849 *
850 * \return 0 on success, or -1 on error.
851 *
852 * \sa SDL_GetWindowSurface()
853 * \sa SDL_UpdateWindowSurfaceRects()
854 */
855extern DECLSPEC int SDLCALL SDL_UpdateWindowSurface(SDL_Window * window);
856
857/**
858 * \brief Copy a number of rectangles on the window surface to the screen.
859 *
860 * \return 0 on success, or -1 on error.
861 *
862 * \sa SDL_GetWindowSurface()
863 * \sa SDL_UpdateWindowSurface()
864 */
865extern DECLSPEC int SDLCALL SDL_UpdateWindowSurfaceRects(SDL_Window * window,
866 const SDL_Rect * rects,
867 int numrects);
868
869/**
870 * \brief Set a window's input grab mode.
871 *
872 * \param window The window for which the input grab mode should be set.
873 * \param grabbed This is SDL_TRUE to grab input, and SDL_FALSE to release input.
874 *
875 * If the caller enables a grab while another window is currently grabbed,
876 * the other window loses its grab in favor of the caller's window.
877 *
878 * \sa SDL_GetWindowGrab()
879 */
880extern DECLSPEC void SDLCALL SDL_SetWindowGrab(SDL_Window * window,
881 SDL_bool grabbed);
882
883/**
884 * \brief Get a window's input grab mode.
885 *
886 * \return This returns SDL_TRUE if input is grabbed, and SDL_FALSE otherwise.
887 *
888 * \sa SDL_SetWindowGrab()
889 */
890extern DECLSPEC SDL_bool SDLCALL SDL_GetWindowGrab(SDL_Window * window);
891
892/**
893 * \brief Get the window that currently has an input grab enabled.
894 *
895 * \return This returns the window if input is grabbed, and NULL otherwise.
896 *
897 * \sa SDL_SetWindowGrab()
898 */
899extern DECLSPEC SDL_Window * SDLCALL SDL_GetGrabbedWindow(void);
900
901/**
902 * \brief Set the brightness (gamma correction) for a window.
903 *
904 * \return 0 on success, or -1 if setting the brightness isn't supported.
905 *
906 * \sa SDL_GetWindowBrightness()
907 * \sa SDL_SetWindowGammaRamp()
908 */
909extern DECLSPEC int SDLCALL SDL_SetWindowBrightness(SDL_Window * window, float brightness);
910
911/**
912 * \brief Get the brightness (gamma correction) for a window.
913 *
914 * \return The last brightness value passed to SDL_SetWindowBrightness()
915 *
916 * \sa SDL_SetWindowBrightness()
917 */
918extern DECLSPEC float SDLCALL SDL_GetWindowBrightness(SDL_Window * window);
919
920/**
921 * \brief Set the opacity for a window
922 *
923 * \param window The window which will be made transparent or opaque
924 * \param opacity Opacity (0.0f - transparent, 1.0f - opaque) This will be
925 * clamped internally between 0.0f and 1.0f.
926 *
927 * \return 0 on success, or -1 if setting the opacity isn't supported.
928 *
929 * \sa SDL_GetWindowOpacity()
930 */
931extern DECLSPEC int SDLCALL SDL_SetWindowOpacity(SDL_Window * window, float opacity);
932
933/**
934 * \brief Get the opacity of a window.
935 *
936 * If transparency isn't supported on this platform, opacity will be reported
937 * as 1.0f without error.
938 *
939 * \param window The window in question.
940 * \param out_opacity Opacity (0.0f - transparent, 1.0f - opaque)
941 *
942 * \return 0 on success, or -1 on error (invalid window, etc).
943 *
944 * \sa SDL_SetWindowOpacity()
945 */
946extern DECLSPEC int SDLCALL SDL_GetWindowOpacity(SDL_Window * window, float * out_opacity);
947
948/**
949 * \brief Sets the window as a modal for another window (TODO: reconsider this function and/or its name)
950 *
951 * \param modal_window The window that should be modal
952 * \param parent_window The parent window
953 *
954 * \return 0 on success, or -1 otherwise.
955 */
956extern DECLSPEC int SDLCALL SDL_SetWindowModalFor(SDL_Window * modal_window, SDL_Window * parent_window);
957
958/**
959 * \brief Explicitly sets input focus to the window.
960 *
961 * You almost certainly want SDL_RaiseWindow() instead of this function. Use
962 * this with caution, as you might give focus to a window that's completely
963 * obscured by other windows.
964 *
965 * \param window The window that should get the input focus
966 *
967 * \return 0 on success, or -1 otherwise.
968 * \sa SDL_RaiseWindow()
969 */
970extern DECLSPEC int SDLCALL SDL_SetWindowInputFocus(SDL_Window * window);
971
972/**
973 * \brief Set the gamma ramp for a window.
974 *
975 * \param window The window for which the gamma ramp should be set.
976 * \param red The translation table for the red channel, or NULL.
977 * \param green The translation table for the green channel, or NULL.
978 * \param blue The translation table for the blue channel, or NULL.
979 *
980 * \return 0 on success, or -1 if gamma ramps are unsupported.
981 *
982 * Set the gamma translation table for the red, green, and blue channels
983 * of the video hardware. Each table is an array of 256 16-bit quantities,
984 * representing a mapping between the input and output for that channel.
985 * The input is the index into the array, and the output is the 16-bit
986 * gamma value at that index, scaled to the output color precision.
987 *
988 * \sa SDL_GetWindowGammaRamp()
989 */
990extern DECLSPEC int SDLCALL SDL_SetWindowGammaRamp(SDL_Window * window,
991 const Uint16 * red,
992 const Uint16 * green,
993 const Uint16 * blue);
994
995/**
996 * \brief Get the gamma ramp for a window.
997 *
998 * \param window The window from which the gamma ramp should be queried.
999 * \param red A pointer to a 256 element array of 16-bit quantities to hold
1000 * the translation table for the red channel, or NULL.
1001 * \param green A pointer to a 256 element array of 16-bit quantities to hold
1002 * the translation table for the green channel, or NULL.
1003 * \param blue A pointer to a 256 element array of 16-bit quantities to hold
1004 * the translation table for the blue channel, or NULL.
1005 *
1006 * \return 0 on success, or -1 if gamma ramps are unsupported.
1007 *
1008 * \sa SDL_SetWindowGammaRamp()
1009 */
1010extern DECLSPEC int SDLCALL SDL_GetWindowGammaRamp(SDL_Window * window,
1011 Uint16 * red,
1012 Uint16 * green,
1013 Uint16 * blue);
1014
1015/**
1016 * \brief Possible return values from the SDL_HitTest callback.
1017 *
1018 * \sa SDL_HitTest
1019 */
1020typedef enum
1021{
1022 SDL_HITTEST_NORMAL, /**< Region is normal. No special properties. */
1023 SDL_HITTEST_DRAGGABLE, /**< Region can drag entire window. */
1024 SDL_HITTEST_RESIZE_TOPLEFT,
1025 SDL_HITTEST_RESIZE_TOP,
1026 SDL_HITTEST_RESIZE_TOPRIGHT,
1027 SDL_HITTEST_RESIZE_RIGHT,
1028 SDL_HITTEST_RESIZE_BOTTOMRIGHT,
1029 SDL_HITTEST_RESIZE_BOTTOM,
1030 SDL_HITTEST_RESIZE_BOTTOMLEFT,
1031 SDL_HITTEST_RESIZE_LEFT
1032} SDL_HitTestResult;
1033
1034/**
1035 * \brief Callback used for hit-testing.
1036 *
1037 * \sa SDL_SetWindowHitTest
1038 */
1039typedef SDL_HitTestResult (SDLCALL *SDL_HitTest)(SDL_Window *win,
1040 const SDL_Point *area,
1041 void *data);
1042
1043/**
1044 * \brief Provide a callback that decides if a window region has special properties.
1045 *
1046 * Normally windows are dragged and resized by decorations provided by the
1047 * system window manager (a title bar, borders, etc), but for some apps, it
1048 * makes sense to drag them from somewhere else inside the window itself; for
1049 * example, one might have a borderless window that wants to be draggable
1050 * from any part, or simulate its own title bar, etc.
1051 *
1052 * This function lets the app provide a callback that designates pieces of
1053 * a given window as special. This callback is run during event processing
1054 * if we need to tell the OS to treat a region of the window specially; the
1055 * use of this callback is known as "hit testing."
1056 *
1057 * Mouse input may not be delivered to your application if it is within
1058 * a special area; the OS will often apply that input to moving the window or
1059 * resizing the window and not deliver it to the application.
1060 *
1061 * Specifying NULL for a callback disables hit-testing. Hit-testing is
1062 * disabled by default.
1063 *
1064 * Platforms that don't support this functionality will return -1
1065 * unconditionally, even if you're attempting to disable hit-testing.
1066 *
1067 * Your callback may fire at any time, and its firing does not indicate any
1068 * specific behavior (for example, on Windows, this certainly might fire
1069 * when the OS is deciding whether to drag your window, but it fires for lots
1070 * of other reasons, too, some unrelated to anything you probably care about
1071 * _and when the mouse isn't actually at the location it is testing_).
1072 * Since this can fire at any time, you should try to keep your callback
1073 * efficient, devoid of allocations, etc.
1074 *
1075 * \param window The window to set hit-testing on.
1076 * \param callback The callback to call when doing a hit-test.
1077 * \param callback_data An app-defined void pointer passed to the callback.
1078 * \return 0 on success, -1 on error (including unsupported).
1079 */
1080extern DECLSPEC int SDLCALL SDL_SetWindowHitTest(SDL_Window * window,
1081 SDL_HitTest callback,
1082 void *callback_data);
1083
1084/**
1085 * \brief Destroy a window.
1086 */
1087extern DECLSPEC void SDLCALL SDL_DestroyWindow(SDL_Window * window);
1088
1089
1090/**
1091 * \brief Returns whether the screensaver is currently enabled (default off).
1092 *
1093 * \sa SDL_EnableScreenSaver()
1094 * \sa SDL_DisableScreenSaver()
1095 */
1096extern DECLSPEC SDL_bool SDLCALL SDL_IsScreenSaverEnabled(void);
1097
1098/**
1099 * \brief Allow the screen to be blanked by a screensaver
1100 *
1101 * \sa SDL_IsScreenSaverEnabled()
1102 * \sa SDL_DisableScreenSaver()
1103 */
1104extern DECLSPEC void SDLCALL SDL_EnableScreenSaver(void);
1105
1106/**
1107 * \brief Prevent the screen from being blanked by a screensaver
1108 *
1109 * \sa SDL_IsScreenSaverEnabled()
1110 * \sa SDL_EnableScreenSaver()
1111 */
1112extern DECLSPEC void SDLCALL SDL_DisableScreenSaver(void);
1113
1114
1115/**
1116 * \name OpenGL support functions
1117 */
1118/* @{ */
1119
1120/**
1121 * \brief Dynamically load an OpenGL library.
1122 *
1123 * \param path The platform dependent OpenGL library name, or NULL to open the
1124 * default OpenGL library.
1125 *
1126 * \return 0 on success, or -1 if the library couldn't be loaded.
1127 *
1128 * This should be done after initializing the video driver, but before
1129 * creating any OpenGL windows. If no OpenGL library is loaded, the default
1130 * library will be loaded upon creation of the first OpenGL window.
1131 *
1132 * \note If you do this, you need to retrieve all of the GL functions used in
1133 * your program from the dynamic library using SDL_GL_GetProcAddress().
1134 *
1135 * \sa SDL_GL_GetProcAddress()
1136 * \sa SDL_GL_UnloadLibrary()
1137 */
1138extern DECLSPEC int SDLCALL SDL_GL_LoadLibrary(const char *path);
1139
1140/**
1141 * \brief Get the address of an OpenGL function.
1142 */
1143extern DECLSPEC void *SDLCALL SDL_GL_GetProcAddress(const char *proc);
1144
1145/**
1146 * \brief Unload the OpenGL library previously loaded by SDL_GL_LoadLibrary().
1147 *
1148 * \sa SDL_GL_LoadLibrary()
1149 */
1150extern DECLSPEC void SDLCALL SDL_GL_UnloadLibrary(void);
1151
1152/**
1153 * \brief Return true if an OpenGL extension is supported for the current
1154 * context.
1155 */
1156extern DECLSPEC SDL_bool SDLCALL SDL_GL_ExtensionSupported(const char
1157 *extension);
1158
1159/**
1160 * \brief Reset all previously set OpenGL context attributes to their default values
1161 */
1162extern DECLSPEC void SDLCALL SDL_GL_ResetAttributes(void);
1163
1164/**
1165 * \brief Set an OpenGL window attribute before window creation.
1166 *
1167 * \return 0 on success, or -1 if the attribute could not be set.
1168 */
1169extern DECLSPEC int SDLCALL SDL_GL_SetAttribute(SDL_GLattr attr, int value);
1170
1171/**
1172 * \brief Get the actual value for an attribute from the current context.
1173 *
1174 * \return 0 on success, or -1 if the attribute could not be retrieved.
1175 * The integer at \c value will be modified in either case.
1176 */
1177extern DECLSPEC int SDLCALL SDL_GL_GetAttribute(SDL_GLattr attr, int *value);
1178
1179/**
1180 * \brief Create an OpenGL context for use with an OpenGL window, and make it
1181 * current.
1182 *
1183 * \sa SDL_GL_DeleteContext()
1184 */
1185extern DECLSPEC SDL_GLContext SDLCALL SDL_GL_CreateContext(SDL_Window *
1186 window);
1187
1188/**
1189 * \brief Set up an OpenGL context for rendering into an OpenGL window.
1190 *
1191 * \note The context must have been created with a compatible window.
1192 */
1193extern DECLSPEC int SDLCALL SDL_GL_MakeCurrent(SDL_Window * window,
1194 SDL_GLContext context);
1195
1196/**
1197 * \brief Get the currently active OpenGL window.
1198 */
1199extern DECLSPEC SDL_Window* SDLCALL SDL_GL_GetCurrentWindow(void);
1200
1201/**
1202 * \brief Get the currently active OpenGL context.
1203 */
1204extern DECLSPEC SDL_GLContext SDLCALL SDL_GL_GetCurrentContext(void);
1205
1206/**
1207 * \brief Get the size of a window's underlying drawable in pixels (for use
1208 * with glViewport).
1209 *
1210 * \param window Window from which the drawable size should be queried
1211 * \param w Pointer to variable for storing the width in pixels, may be NULL
1212 * \param h Pointer to variable for storing the height in pixels, may be NULL
1213 *
1214 * This may differ from SDL_GetWindowSize() if we're rendering to a high-DPI
1215 * drawable, i.e. the window was created with SDL_WINDOW_ALLOW_HIGHDPI on a
1216 * platform with high-DPI support (Apple calls this "Retina"), and not disabled
1217 * by the SDL_HINT_VIDEO_HIGHDPI_DISABLED hint.
1218 *
1219 * \sa SDL_GetWindowSize()
1220 * \sa SDL_CreateWindow()
1221 */
1222extern DECLSPEC void SDLCALL SDL_GL_GetDrawableSize(SDL_Window * window, int *w,
1223 int *h);
1224
1225/**
1226 * \brief Set the swap interval for the current OpenGL context.
1227 *
1228 * \param interval 0 for immediate updates, 1 for updates synchronized with the
1229 * vertical retrace. If the system supports it, you may
1230 * specify -1 to allow late swaps to happen immediately
1231 * instead of waiting for the next retrace.
1232 *
1233 * \return 0 on success, or -1 if setting the swap interval is not supported.
1234 *
1235 * \sa SDL_GL_GetSwapInterval()
1236 */
1237extern DECLSPEC int SDLCALL SDL_GL_SetSwapInterval(int interval);
1238
1239/**
1240 * \brief Get the swap interval for the current OpenGL context.
1241 *
1242 * \return 0 if there is no vertical retrace synchronization, 1 if the buffer
1243 * swap is synchronized with the vertical retrace, and -1 if late
1244 * swaps happen immediately instead of waiting for the next retrace.
1245 * If the system can't determine the swap interval, or there isn't a
1246 * valid current context, this will return 0 as a safe default.
1247 *
1248 * \sa SDL_GL_SetSwapInterval()
1249 */
1250extern DECLSPEC int SDLCALL SDL_GL_GetSwapInterval(void);
1251
1252/**
1253 * \brief Swap the OpenGL buffers for a window, if double-buffering is
1254 * supported.
1255 */
1256extern DECLSPEC void SDLCALL SDL_GL_SwapWindow(SDL_Window * window);
1257
1258/**
1259 * \brief Delete an OpenGL context.
1260 *
1261 * \sa SDL_GL_CreateContext()
1262 */
1263extern DECLSPEC void SDLCALL SDL_GL_DeleteContext(SDL_GLContext context);
1264
1265/* @} *//* OpenGL support functions */
1266
1267
1268/* Ends C function definitions when using C++ */
1269#ifdef __cplusplus
1270}
1271#endif
1272#include "close_code.h"
1273
1274#endif /* SDL_video_h_ */
1275
1276/* vi: set ts=4 sw=4 expandtab: */
1277