/*
Simple DirectMedia Layer
- Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
+ Copyright (C) 1997-2019 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
* Header file for SDL video functions.
*/
-#ifndef _SDL_video_h
-#define _SDL_video_h
+#ifndef SDL_video_h_
+#define SDL_video_h_
#include "SDL_stdinc.h"
#include "SDL_pixels.h"
typedef struct
{
Uint32 format; /**< pixel format */
- int w; /**< width */
- int h; /**< height */
+ 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;
* \sa SDL_SetWindowPosition()
* \sa SDL_SetWindowSize()
* \sa SDL_SetWindowBordered()
+ * \sa SDL_SetWindowResizable()
* \sa SDL_SetWindowTitle()
* \sa SDL_ShowWindow()
*/
*/
typedef enum
{
+ /* !!! FIXME: change this to name = (1<<x). */
SDL_WINDOW_FULLSCREEN = 0x00000001, /**< fullscreen window */
SDL_WINDOW_OPENGL = 0x00000002, /**< window usable with OpenGL context */
SDL_WINDOW_SHOWN = 0x00000004, /**< window is visible */
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 */
+ 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 INPUT_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_VULKAN = 0x10000000 /**< window usable for Vulkan surface */
} SDL_WindowFlags;
/**
* \brief Used to indicate that you don't care what the window position is.
*/
-#define SDL_WINDOWPOS_UNDEFINED_MASK 0x1FFF0000
+#define SDL_WINDOWPOS_UNDEFINED_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) \
/**
* \brief Used to indicate that the window position should be centered.
*/
-#define SDL_WINDOWPOS_CENTERED_MASK 0x2FFF0000
+#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) \
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_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
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_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_WindowEventID;
+/**
+ * \brief Event subtype for display events
+ */
+typedef enum
+{
+ SDL_DISPLAYEVENT_NONE, /**< Never used */
+ SDL_DISPLAYEVENT_ORIENTATION /**< Display orientation has changed to data1 */
+} SDL_DisplayEventID;
+
+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 An opaque handle to an OpenGL context.
*/
SDL_GL_CONTEXT_FLAGS,
SDL_GL_CONTEXT_PROFILE_MASK,
SDL_GL_SHARE_WITH_CURRENT_CONTEXT,
- SDL_GL_FRAMEBUFFER_SRGB_CAPABLE
+ SDL_GL_FRAMEBUFFER_SRGB_CAPABLE,
+ SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
+ SDL_GL_CONTEXT_RESET_NOTIFICATION,
+ SDL_GL_CONTEXT_NO_ERROR
} 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_GL_CONTEXT_PROFILE_ES = 0x0004 /**< GLX_CONTEXT_ES2_PROFILE_BIT_EXT */
} SDL_GLprofile;
typedef enum
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 */
*/
extern DECLSPEC int SDLCALL SDL_GetDisplayBounds(int displayIndex, SDL_Rect * rect);
+/**
+ * \brief Get the usable desktop area represented by a display, with the
+ * primary display located at 0,0
+ *
+ * This is the same area as SDL_GetDisplayBounds() reports, but with portions
+ * reserved by the system removed. For example, on Mac OS X, 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.
+ *
+ * \return 0 on success, or -1 if the index is out of range.
+ *
+ * \sa SDL_GetDisplayBounds()
+ * \sa SDL_GetNumVideoDisplays()
+ */
+extern DECLSPEC int SDLCALL SDL_GetDisplayUsableBounds(int displayIndex, SDL_Rect * rect);
+
+/**
+ * \brief Get the dots/pixels-per-inch for a display
+ *
+ * \note Diagonal, horizontal and vertical DPI can all be optionally
+ * returned if the parameter is non-NULL.
+ *
+ * \return 0 on success, or -1 if no DPI information is available or the index is out of range.
+ *
+ * \sa SDL_GetNumVideoDisplays()
+ */
+extern DECLSPEC int SDLCALL SDL_GetDisplayDPI(int displayIndex, float * ddpi, float * hdpi, float * vdpi);
+
+/**
+ * \brief Get the orientation of a display
+ *
+ * \return The orientation of the display, or SDL_ORIENTATION_UNKNOWN if it isn't available.
+ *
+ * \sa SDL_GetNumVideoDisplays()
+ */
+extern DECLSPEC SDL_DisplayOrientation SDLCALL SDL_GetDisplayOrientation(int displayIndex);
+
/**
* \brief Returns the number of available display modes.
*
* ::SDL_WINDOWPOS_UNDEFINED.
* \param y The y position of the window, ::SDL_WINDOWPOS_CENTERED, or
* ::SDL_WINDOWPOS_UNDEFINED.
- * \param w The width of the window.
- * \param h The height of the window.
+ * \param w The width of the window, in screen coordinates.
+ * \param h The height of the window, in screen coordinates.
* \param flags The flags for the window, a mask of any of the following:
* ::SDL_WINDOW_FULLSCREEN, ::SDL_WINDOW_OPENGL,
* ::SDL_WINDOW_HIDDEN, ::SDL_WINDOW_BORDERLESS,
* ::SDL_WINDOW_RESIZABLE, ::SDL_WINDOW_MAXIMIZED,
* ::SDL_WINDOW_MINIMIZED, ::SDL_WINDOW_INPUT_GRABBED,
- * ::SDL_WINDOW_ALLOW_HIGHDPI.
+ * ::SDL_WINDOW_ALLOW_HIGHDPI, ::SDL_WINDOW_VULKAN.
*
- * \return The id of the window created, or zero if window creation failed.
+ * \return The created window, or NULL if window creation failed.
+ *
+ * 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 Mac OS X). Use SDL_GetWindowSize() to query
+ * the client area's size in screen coordinates, and SDL_GL_GetDrawableSize(),
+ * SDL_Vulkan_GetDrawableSize(), or SDL_GetRendererOutputSize() to query the
+ * drawable size in pixels.
+ *
+ * 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.
+ *
+ * \note 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.
*
* \sa SDL_DestroyWindow()
+ * \sa SDL_GL_LoadLibrary()
+ * \sa SDL_Vulkan_LoadLibrary()
*/
extern DECLSPEC SDL_Window * SDLCALL SDL_CreateWindow(const char *title,
int x, int y, int w,
*
* \param data A pointer to driver-dependent window creation data
*
- * \return The id of the window created, or zero if window creation failed.
+ * \return The created window, or NULL if window creation failed.
*
* \sa SDL_DestroyWindow()
*/
* \brief Set the position of a window.
*
* \param window The window to reposition.
- * \param x The x coordinate of the window, ::SDL_WINDOWPOS_CENTERED, or
- ::SDL_WINDOWPOS_UNDEFINED.
- * \param y The y coordinate of the window, ::SDL_WINDOWPOS_CENTERED, or
- ::SDL_WINDOWPOS_UNDEFINED.
+ * \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.
*
* \note The window coordinate origin is the upper left of the display.
*
* \brief Get the position of a window.
*
* \param window The window to query.
- * \param x Pointer to variable for storing the x position, may be NULL
- * \param y Pointer to variable for storing the y position, may be NULL
+ * \param x Pointer to variable for storing the x position, in screen
+ * coordinates. May be NULL.
+ * \param y Pointer to variable for storing the y position, in screen
+ * coordinates. May be NULL.
*
* \sa SDL_SetWindowPosition()
*/
* \brief Set the size of a window's client area.
*
* \param window The window to resize.
- * \param w The width of the window, must be >0
- * \param h The height of the window, must be >0
+ * \param w The width of the window, in screen coordinates. Must be >0.
+ * \param h The height of the window, in screen coordinates. Must be >0.
+ *
+ * \note Fullscreen windows automatically match the size of the display mode,
+ * and you should use SDL_SetWindowDisplayMode() to change their size.
*
- * \note You can't change the size of a fullscreen window, it automatically
- * matches the size of the display mode.
+ * 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 OS X). Use SDL_GL_GetDrawableSize() or
+ * SDL_GetRendererOutputSize() to get the real client area size in pixels.
*
* \sa SDL_GetWindowSize()
+ * \sa SDL_SetWindowDisplayMode()
*/
extern DECLSPEC void SDLCALL SDL_SetWindowSize(SDL_Window * window, int w,
int h);
* \brief Get the size of a window's client area.
*
* \param window The window to query.
- * \param w Pointer to variable for storing the width, may be NULL
- * \param h Pointer to variable for storing the height, may be NULL
+ * \param w Pointer to variable for storing the width, in screen
+ * coordinates. May be NULL.
+ * \param h Pointer to variable for storing the height, in screen
+ * coordinates. May be NULL.
+ *
+ * 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 OS X). Use SDL_GL_GetDrawableSize() or
+ * SDL_GetRendererOutputSize() to get the real client area size in pixels.
*
* \sa SDL_SetWindowSize()
*/
extern DECLSPEC void SDLCALL SDL_GetWindowSize(SDL_Window * window, int *w,
int *h);
+/**
+ * \brief Get the size of a window's borders (decorations) around the client area.
+ *
+ * \param window The window to query.
+ * \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.
+ *
+ * \return 0 on success, or -1 if getting this information is not supported.
+ *
+ * \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.
+ */
+extern DECLSPEC int SDLCALL SDL_GetWindowBordersSize(SDL_Window * window,
+ int *top, int *left,
+ int *bottom, int *right);
+
/**
* \brief Set the minimum size of a window's client area.
*
extern DECLSPEC void SDLCALL SDL_SetWindowBordered(SDL_Window * window,
SDL_bool bordered);
+/**
+ * \brief 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.
+ *
+ * \param window The window of which to change the resizable state.
+ * \param resizable SDL_TRUE to allow resizing, SDL_FALSE to disallow.
+ *
+ * \note You can't change the resizable state of a fullscreen window.
+ *
+ * \sa SDL_GetWindowFlags()
+ */
+extern DECLSPEC void SDLCALL SDL_SetWindowResizable(SDL_Window * window,
+ SDL_bool resizable);
+
/**
* \brief Show a window.
*
* \return 0 on success, or -1 on error.
*
* \sa SDL_GetWindowSurface()
- * \sa SDL_UpdateWindowSurfaceRect()
+ * \sa SDL_UpdateWindowSurface()
*/
extern DECLSPEC int SDLCALL SDL_UpdateWindowSurfaceRects(SDL_Window * window,
const SDL_Rect * rects,
* \param window The window for which the input grab mode should be set.
* \param grabbed This is SDL_TRUE to grab input, and SDL_FALSE to release input.
*
+ * 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.
+ *
* \sa SDL_GetWindowGrab()
*/
extern DECLSPEC void SDLCALL SDL_SetWindowGrab(SDL_Window * window,
*/
extern DECLSPEC SDL_bool SDLCALL SDL_GetWindowGrab(SDL_Window * window);
+/**
+ * \brief Get the window that currently has an input grab enabled.
+ *
+ * \return This returns the window if input is grabbed, and NULL otherwise.
+ *
+ * \sa SDL_SetWindowGrab()
+ */
+extern DECLSPEC SDL_Window * SDLCALL SDL_GetGrabbedWindow(void);
+
/**
* \brief Set the brightness (gamma correction) for a window.
*
*/
extern DECLSPEC float SDLCALL SDL_GetWindowBrightness(SDL_Window * window);
+/**
+ * \brief Set the opacity for a window
+ *
+ * \param window The window which will be made transparent or opaque
+ * \param opacity Opacity (0.0f - transparent, 1.0f - opaque) This will be
+ * clamped internally between 0.0f and 1.0f.
+ *
+ * \return 0 on success, or -1 if setting the opacity isn't supported.
+ *
+ * \sa SDL_GetWindowOpacity()
+ */
+extern DECLSPEC int SDLCALL SDL_SetWindowOpacity(SDL_Window * window, float opacity);
+
+/**
+ * \brief Get the opacity of a window.
+ *
+ * If transparency isn't supported on this platform, opacity will be reported
+ * as 1.0f without error.
+ *
+ * \param window The window in question.
+ * \param out_opacity Opacity (0.0f - transparent, 1.0f - opaque)
+ *
+ * \return 0 on success, or -1 on error (invalid window, etc).
+ *
+ * \sa SDL_SetWindowOpacity()
+ */
+extern DECLSPEC int SDLCALL SDL_GetWindowOpacity(SDL_Window * window, float * out_opacity);
+
+/**
+ * \brief Sets the window as a modal for another window (TODO: reconsider this function and/or its name)
+ *
+ * \param modal_window The window that should be modal
+ * \param parent_window The parent window
+ *
+ * \return 0 on success, or -1 otherwise.
+ */
+extern DECLSPEC int SDLCALL SDL_SetWindowModalFor(SDL_Window * modal_window, SDL_Window * parent_window);
+
+/**
+ * \brief Explicitly sets 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's completely
+ * obscured by other windows.
+ *
+ * \param window The window that should get the input focus
+ *
+ * \return 0 on success, or -1 otherwise.
+ * \sa SDL_RaiseWindow()
+ */
+extern DECLSPEC int SDLCALL SDL_SetWindowInputFocus(SDL_Window * window);
+
/**
* \brief Set the gamma ramp for a window.
*
Uint16 * green,
Uint16 * blue);
+/**
+ * \brief 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;
+
+/**
+ * \brief Callback used for hit-testing.
+ *
+ * \sa SDL_SetWindowHitTest
+ */
+typedef SDL_HitTestResult (SDLCALL *SDL_HitTest)(SDL_Window *win,
+ const SDL_Point *area,
+ void *data);
+
+/**
+ * \brief 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 callback to call when doing a hit-test.
+ * \param callback_data An app-defined void pointer passed to the callback.
+ * \return 0 on success, -1 on error (including unsupported).
+ */
+extern DECLSPEC int SDLCALL SDL_SetWindowHitTest(SDL_Window * window,
+ SDL_HitTest callback,
+ void *callback_data);
+
/**
* \brief Destroy a window.
*/
/**
- * \brief Returns whether the screensaver is currently enabled (default on).
+ * \brief Returns whether the screensaver is currently enabled (default off).
*
* \sa SDL_EnableScreenSaver()
* \sa SDL_DisableScreenSaver()
/**
* \brief Set an OpenGL window attribute before window creation.
+ *
+ * \return 0 on success, or -1 if the attribute could not be set.
*/
extern DECLSPEC int SDLCALL SDL_GL_SetAttribute(SDL_GLattr attr, int value);
/**
* \brief Get the actual value for an attribute from the current context.
+ *
+ * \return 0 on success, or -1 if the attribute could not be retrieved.
+ * The integer at \c value will be modified in either case.
*/
extern DECLSPEC int SDLCALL SDL_GL_GetAttribute(SDL_GLattr attr, int *value);
extern DECLSPEC SDL_GLContext SDLCALL SDL_GL_GetCurrentContext(void);
/**
- * \brief Get the size of a window's underlying drawable (for use with glViewport).
+ * \brief Get the size of a window's underlying drawable in pixels (for use
+ * with glViewport).
*
* \param window Window from which the drawable size should be queried
- * \param w Pointer to variable for storing the width, may be NULL
- * \param h Pointer to variable for storing the height, may be NULL
+ * \param w Pointer to variable for storing the width in pixels, may be NULL
+ * \param h Pointer to variable for storing the height in pixels, may be NULL
*
- * This may differ from SDL_GetWindowSize if we're rendering to a high-DPI
+ * 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.
#endif
#include "close_code.h"
-#endif /* _SDL_video_h */
+#endif /* SDL_video_h_ */
/* vi: set ts=4 sw=4 expandtab: */
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