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SDL_video.c
1647 lines (1460 loc) · 41.3 KB
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* The high-level video driver subsystem */
#include "SDL.h"
#include "SDL_sysvideo.h"
#include "SDL_blit.h"
#include "SDL_pixels_c.h"
#include "SDL_cursor_c.h"
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#include "../events/SDL_sysevents.h"
#include "../events/SDL_events_c.h"
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/* Available video drivers */
static VideoBootStrap *bootstrap[] = {
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#if SDL_VIDEO_DRIVER_QUARTZ
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&QZ_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_X11
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&X11_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_DGA
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&DGA_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_NANOX
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&NX_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_IPOD
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&iPod_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_QTOPIA
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&Qtopia_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_WSCONS
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&WSCONS_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_FBCON
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&FBCON_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_DIRECTFB
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&DirectFB_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_PS2GS
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&PS2GS_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_GGI
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&GGI_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_VGL
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&VGL_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_SVGALIB
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&SVGALIB_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_GAPI
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&GAPI_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_WINDIB
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&WINDIB_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_DDRAW
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&DIRECTX_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_BWINDOW
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&BWINDOW_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_TOOLBOX
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&TOOLBOX_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_DRAWSPROCKET
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&DSp_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_CYBERGRAPHICS
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&CGX_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_PHOTON
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&ph_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_EPOC
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&EPOC_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_XBIOS
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&XBIOS_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_GEM
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&GEM_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_PICOGUI
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&PG_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_DC
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&DC_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_RISCOS
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&RISCOS_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_OS2FS
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&OS2FSLib_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_AALIB
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&AALIB_bootstrap,
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#endif
#if SDL_VIDEO_DRIVER_DUMMY
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&DUMMY_bootstrap,
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#endif
#if SDL_VIDEO_DRIVER_GLSDL
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&glSDL_bootstrap,
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#endif
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NULL
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};
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static SDL_VideoDevice *_this = NULL;
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/* Various local functions */
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int SDL_VideoInit (const char *driver_name, Uint32 flags);
void SDL_VideoQuit (void);
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static int
cmpmodes (const void *A, const void *B)
{
SDL_DisplayMode a = *(const SDL_DisplayMode *) A;
SDL_DisplayMode b = *(const SDL_DisplayMode *) B;
if (a.w != b.w) {
return b.w - a.w;
}
if (a.h != b.h) {
return b.h - a.h;
}
if (SDL_BITSPERPIXEL (a.format) != SDL_BITSPERPIXEL (b.format)) {
return SDL_BITSPERPIXEL (b.format) - SDL_BITSPERPIXEL (a.format);
}
if (a.refresh_rate != b.refresh_rate) {
return b.refresh_rate - a.refresh_rate;
}
return 0;
}
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int
SDL_GetNumVideoDrivers (void)
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{
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return SDL_arraysize (bootstrap) - 1;
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}
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const char *
SDL_GetVideoDriver (int index)
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{
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if (index >= 0 && index < SDL_GetNumVideoDrivers ()) {
return bootstrap[index]->name;
}
return NULL;
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}
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/*
* Initialize the video and event subsystems -- determine native pixel format
*/
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int
SDL_VideoInit (const char *driver_name, Uint32 flags)
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{
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SDL_VideoDevice *video;
int index;
int i;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
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/* Toggle the event thread flags, based on OS requirements */
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#if defined(MUST_THREAD_EVENTS)
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flags |= SDL_INIT_EVENTTHREAD;
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#elif defined(CANT_THREAD_EVENTS)
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if ((flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD) {
SDL_SetError ("OS doesn't support threaded events");
return -1;
}
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#endif
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/* Check to make sure we don't overwrite '_this' */
if (_this != NULL) {
SDL_VideoQuit ();
}
/* Select the proper video driver */
index = 0;
video = NULL;
if (driver_name != NULL) {
for (i = 0; bootstrap[i]; ++i) {
if (SDL_strncmp (bootstrap[i]->name, driver_name,
SDL_strlen (bootstrap[i]->name)) == 0) {
if (bootstrap[i]->available ()) {
video = bootstrap[i]->create (index);
}
break;
}
}
} else {
for (i = 0; bootstrap[i]; ++i) {
if (bootstrap[i]->available ()) {
video = bootstrap[i]->create (index);
if (video != NULL) {
break;
}
}
}
}
if (video == NULL) {
if (driver_name) {
SDL_SetError ("%s not available", driver_name);
} else {
SDL_SetError ("No available video device");
}
return -1;
}
_this = video;
_this->name = bootstrap[i]->name;
_this->next_window_id = 1;
/* Set some very sane GL defaults */
_this->gl_config.driver_loaded = 0;
_this->gl_config.dll_handle = NULL;
_this->gl_config.red_size = 3;
_this->gl_config.green_size = 3;
_this->gl_config.blue_size = 2;
_this->gl_config.alpha_size = 0;
_this->gl_config.buffer_size = 0;
_this->gl_config.depth_size = 16;
_this->gl_config.stencil_size = 0;
_this->gl_config.double_buffer = 1;
_this->gl_config.accum_red_size = 0;
_this->gl_config.accum_green_size = 0;
_this->gl_config.accum_blue_size = 0;
_this->gl_config.accum_alpha_size = 0;
_this->gl_config.stereo = 0;
_this->gl_config.multisamplebuffers = 0;
_this->gl_config.multisamplesamples = 0;
_this->gl_config.accelerated = -1; /* not known, don't set */
_this->gl_config.swap_control = -1; /* not known, don't set */
/* Initialize the video subsystem */
if (_this->VideoInit (_this) < 0) {
SDL_VideoQuit ();
return -1;
}
/* Make sure some displays were added */
if (_this->num_displays == 0) {
SDL_SetError ("The video driver did not add any displays");
SDL_VideoQuit ();
return (-1);
}
/* Sort the video modes */
for (i = 0; i < _this->num_displays; ++i) {
SDL_qsort (_this->displays[i].display_modes,
_this->displays[i].num_display_modes,
sizeof (SDL_DisplayMode), cmpmodes);
}
/* Start the event loop */
if (SDL_StartEventLoop (flags) < 0) {
SDL_VideoQuit ();
return -1;
}
SDL_CursorInit (flags & SDL_INIT_EVENTTHREAD);
/* We're ready to go! */
return 0;
}
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const char *
SDL_GetCurrentVideoDriver ()
{
if (!_this) {
return NULL;
}
return _this->name;
}
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SDL_VideoDevice *
SDL_GetVideoDevice ()
{
return _this;
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}
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const SDL_VideoInfo *
SDL_GetVideoInfo (void)
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{
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if (!_this) {
return NULL;
}
return &_this->info;
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}
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void
SDL_AddBasicVideoDisplay (const SDL_DisplayMode * desktop_mode)
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{
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SDL_VideoDisplay display;
SDL_zero (display);
if (desktop_mode) {
display.desktop_mode = *desktop_mode;
}
display.current_mode = display.desktop_mode;
display.max_windows = 1;
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SDL_AddVideoDisplay (&display);
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}
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void
SDL_AddVideoDisplay (SDL_VideoDisplay * display)
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{
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SDL_VideoDisplay *displays;
displays =
SDL_realloc (_this->displays,
(_this->num_displays + 1) * sizeof (*displays));
if (displays) {
displays[_this->num_displays] = *display;
_this->displays = displays;
_this->num_displays++;
}
}
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int
SDL_GetNumVideoDisplays (void)
{
if (!_this) {
return 0;
}
return _this->num_displays;
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}
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int
SDL_SelectVideoDisplay (int index)
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{
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if (!_this) {
SDL_SetError ("Video subsystem has not been initialized");
return (-1);
}
if (index >= 0) {
if (index >= _this->num_displays) {
SDL_SetError ("index must be in the range 0 - %d",
_this->num_displays - 1);
return -1;
}
_this->current_display = index;
}
return _this->current_display;
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}
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void
SDL_AddDisplayMode (int display, const SDL_DisplayMode * mode)
{
SDL_DisplayMode *modes;
int i, nmodes;
/* Make sure we don't already have the mode in the list */
modes = SDL_CurrentDisplay.display_modes;
nmodes = SDL_CurrentDisplay.num_display_modes;
for (i = 0; i < nmodes; ++i) {
if (SDL_memcmp (mode, &modes[i], sizeof (*mode)) == 0) {
return;
}
}
/* Go ahead and add the new mode */
modes = SDL_realloc (modes, (nmodes + 1) * sizeof (*mode));
if (modes) {
SDL_CurrentDisplay.display_modes = modes;
modes[nmodes] = *mode;
SDL_CurrentDisplay.num_display_modes++;
}
}
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int
SDL_GetNumDisplayModes ()
{
if (_this) {
return SDL_CurrentDisplay.num_display_modes;
}
return 0;
}
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const SDL_DisplayMode *
SDL_GetDisplayMode (int index)
{
if (index < 0 || index >= SDL_GetNumDisplayModes ()) {
SDL_SetError ("index must be in the range of 0 - %d",
SDL_GetNumDisplayModes ());
return NULL;
}
return &SDL_CurrentDisplay.display_modes[index];
}
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const SDL_DisplayMode *
SDL_GetDesktopDisplayMode (void)
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{
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if (_this) {
return &SDL_CurrentDisplay.desktop_mode;
}
return NULL;
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}
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const SDL_DisplayMode *
SDL_GetCurrentDisplayMode (void)
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{
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if (_this) {
return &SDL_CurrentDisplay.current_mode;
}
return NULL;
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}
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SDL_DisplayMode *
SDL_GetClosestDisplayMode (const SDL_DisplayMode * mode,
SDL_DisplayMode * closest)
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{
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Uint32 target_format;
int target_refresh_rate;
int i;
SDL_DisplayMode *current, *match;
if (!_this || !mode || !closest) {
return NULL;
}
/* Default to the desktop format */
if (mode->format) {
target_format = mode->format;
} else {
target_format = SDL_CurrentDisplay.desktop_mode.format;
}
/* Default to the desktop refresh rate */
if (mode->refresh_rate) {
target_refresh_rate = mode->refresh_rate;
} else {
target_refresh_rate = SDL_CurrentDisplay.desktop_mode.refresh_rate;
}
match = NULL;
for (i = 0; i < SDL_CurrentDisplay.num_display_modes; ++i) {
current = &SDL_CurrentDisplay.display_modes[i];
if ((current->w && current->h) &&
(current->w < mode->w || current->h < mode->h)) {
/* Out of sorted modes large enough here */
break;
}
if (!match || current->w < match->w || current->h < match->h) {
match = current;
continue;
}
if (current->format != match->format) {
/* Sorted highest depth to lowest */
if (current->format == target_format ||
(SDL_BITSPERPIXEL (current->format) >=
SDL_BITSPERPIXEL (target_format)
&& SDL_PIXELTYPE (current->format) ==
SDL_PIXELTYPE (target_format))) {
match = current;
}
continue;
}
if (current->refresh_rate != match->refresh_rate) {
/* Sorted highest refresh to lowest */
if (current->refresh_rate >= target_refresh_rate) {
match = current;
}
}
}
if (match) {
if (match->format) {
closest->format = match->format;
} else {
closest->format = mode->format;
}
if (match->w && match->h) {
closest->w = match->w;
closest->h = match->h;
} else {
closest->w = mode->w;
closest->h = mode->h;
}
if (match->refresh_rate) {
closest->refresh_rate = match->refresh_rate;
} else {
closest->refresh_rate = mode->refresh_rate;
}
return closest;
}
return NULL;
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}
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int
SDL_SetDisplayMode (const SDL_DisplayMode * mode)
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{
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SDL_VideoDisplay *display;
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SDL_DisplayMode display_mode;
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int i;
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if (!_this) {
SDL_SetError ("Video subsystem has not been initialized");
return -1;
}
/* Make sure there's an actual display mode to set */
if (!mode) {
SDL_SetError ("No mode passed to SDL_SetDisplayMode");
return -1;
}
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display = &SDL_CurrentDisplay;
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display_mode = *mode;
/* Default to the current mode */
if (!display_mode.format) {
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display_mode.format = display->current_mode.format;
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}
if (!display_mode.w) {
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display_mode.w = display->current_mode.w;
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}
if (!display_mode.h) {
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display_mode.h = display->current_mode.h;
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}
if (!display_mode.refresh_rate) {
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display_mode.refresh_rate = display->current_mode.refresh_rate;
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}
/* Get a good video mode, the closest one possible */
if (!SDL_GetClosestDisplayMode (&display_mode, &display_mode)) {
SDL_SetError ("No video mode large enough for %dx%d",
display_mode.w, display_mode.h);
return -1;
}
/* See if there's anything left to do */
if (SDL_memcmp
(&display_mode, SDL_GetCurrentDisplayMode (),
sizeof (display_mode)) == 0) {
return 0;
}
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/* Free any previous window surfaces */
for (i = 0; i < display->num_windows; ++i) {
SDL_Window *window = &display->windows[i];
if (window->shadow) {
SDL_FreeSurface (window->shadow);
window->shadow = NULL;
}
if (window->surface) {
SDL_FreeSurface (window->surface);
window->surface = NULL;
}
}
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return _this->SetDisplayMode (_this, &display_mode);
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}
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SDL_WindowID
SDL_CreateWindow (const char *title, int x, int y, int w, int h, Uint32 flags)
{
const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
SDL_WINDOW_BORDERLESS |
SDL_WINDOW_SHOWN |
SDL_WINDOW_OPENGL |
SDL_WINDOW_RESIZABLE |
SDL_WINDOW_MAXIMIZED |
SDL_WINDOW_MINIMIZED |
SDL_WINDOW_INPUT_GRABBED);
SDL_Window window;
int num_windows;
SDL_Window *windows;
if (!_this) {
SDL_SetError ("Video subsystem has not been initialized");
return 0;
}
SDL_zero (window);
window.id = _this->next_window_id++;
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window.title = title ? SDL_strdup (title) : NULL;
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window.x = x;
window.y = y;
window.w = w;
window.h = h;
window.flags = (flags & allowed_flags);
if (_this->CreateWindow && _this->CreateWindow (_this, &window) < 0) {
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if (window.title) {
SDL_free (window.title);
}
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return 0;
}
num_windows = SDL_CurrentDisplay.num_windows;
windows =
SDL_realloc (SDL_CurrentDisplay.windows,
(num_windows + 1) * sizeof (*windows));
if (!windows) {
if (_this->DestroyWindow) {
_this->DestroyWindow (_this, &window);
}
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if (window.title) {
SDL_free (window.title);
}
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return 0;
}
windows[num_windows] = window;
SDL_CurrentDisplay.windows = windows;
SDL_CurrentDisplay.num_windows++;
return window.id;
}
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SDL_WindowID
SDL_CreateWindowFrom (void *data)
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{
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SDL_Window window;
int num_windows;
SDL_Window *windows;
if (!_this) {
SDL_SetError ("Video subsystem has not been initialized");
return (0);
}
SDL_zero (window);
window.id = _this->next_window_id++;
if (!_this->CreateWindowFrom ||
_this->CreateWindowFrom (_this, &window, data) < 0) {
return 0;
}
num_windows = SDL_CurrentDisplay.num_windows;
windows =
SDL_realloc (SDL_CurrentDisplay.windows,
(num_windows + 1) * sizeof (*windows));
if (!windows) {
if (_this->DestroyWindow) {
_this->DestroyWindow (_this, &window);
}
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if (window.title) {
SDL_free (window.title);
}
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return 0;
}
windows[num_windows] = window;
SDL_CurrentDisplay.windows = windows;
SDL_CurrentDisplay.num_windows++;
return window.id;
}
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static __inline__ SDL_Window *
SDL_GetWindowFromID (SDL_WindowID windowID)
{
int i, j;
if (!_this) {
return NULL;
}
for (i = 0; i < _this->num_displays; ++i) {
SDL_VideoDisplay *display = &_this->displays[i];
for (j = 0; j < display->num_windows; ++j) {
SDL_Window *window = &display->windows[j];
if (window->id == windowID) {
return window;
}
}
}
return NULL;
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}
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SDL_Window *
SDL_GetWindowFromSurface (SDL_Surface * surface)
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{
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int i, j;
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if (!_this || !surface) {
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return NULL;
}
for (i = 0; i < _this->num_displays; ++i) {
SDL_VideoDisplay *display = &_this->displays[i];
for (j = 0; j < display->num_windows; ++j) {
SDL_Window *window = &display->windows[j];
if (surface == window->surface || surface == window->shadow) {
return window;
}
}
}
return NULL;
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}
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Uint32
SDL_GetWindowFlags (SDL_WindowID windowID)
717
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return 0;
}
return window->flags;
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}
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void
SDL_SetWindowTitle (SDL_WindowID windowID, const char *title)
728
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return;
}
if (window->title) {
SDL_free (window->title);
}
window->title = SDL_strdup (title);
if (_this->SetWindowTitle) {
_this->SetWindowTitle (_this, window);
}
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}
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const char *
SDL_GetWindowTitle (SDL_WindowID windowID)
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{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return NULL;
}
return window->title;
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}
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void
SDL_SetWindowData (SDL_WindowID windowID, void *userdata)
757
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return;
}
window->userdata = userdata;
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}
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void *
SDL_GetWindowData (SDL_WindowID windowID)
768
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return NULL;
}
return window->userdata;
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}
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void
SDL_SetWindowPosition (SDL_WindowID windowID, int x, int y)
779
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return;
}
window->x = x;
window->y = y;
if (_this->SetWindowPosition) {
_this->SetWindowPosition (_this, window);
}
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}
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void
SDL_GetWindowPosition (SDL_WindowID windowID, int *x, int *y)
796
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return;
}
if (x) {
*x = window->x;
}
if (y) {
*y = window->y;
}
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}
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void
SDL_SetWindowSize (SDL_WindowID windowID, int w, int h)
812
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return;
}
window->w = w;
window->h = h;
if (_this->SetWindowSize) {
_this->SetWindowSize (_this, window);
}
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}
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void
SDL_GetWindowSize (SDL_WindowID windowID, int *w, int *h)
829
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return;
}
if (w) {
*w = window->w;
}
if (h) {
*h = window->h;
}
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842
}
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void
SDL_ShowWindow (SDL_WindowID windowID)
845
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window || (window->flags & SDL_WINDOW_SHOWN)) {
return;
}
window->flags |= SDL_WINDOW_SHOWN;
if (_this->ShowWindow) {
_this->ShowWindow (_this, window);
}
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}
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void
SDL_HideWindow (SDL_WindowID windowID)
861
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window || !(window->flags & SDL_WINDOW_SHOWN)) {
return;
}
window->flags &= ~SDL_WINDOW_SHOWN;
if (_this->HideWindow) {
_this->HideWindow (_this, window);
}
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874
}
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void
SDL_RaiseWindow (SDL_WindowID windowID)
877
{
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SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return;
}
if (_this->RaiseWindow) {
_this->RaiseWindow (_this, window);
}
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888
}
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void
SDL_MaximizeWindow (SDL_WindowID windowID)
891
{
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895
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898
899
900
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902
SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window || (window->flags & SDL_WINDOW_MAXIMIZED)) {
return;
}
window->flags |= SDL_WINDOW_MAXIMIZED;
if (_this->MaximizeWindow) {
_this->MaximizeWindow (_this, window);
}
903
904
}
905
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void
SDL_MinimizeWindow (SDL_WindowID windowID)
907
{
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913
914
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916
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918
SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window || (window->flags & SDL_WINDOW_MINIMIZED)) {
return;
}
window->flags |= SDL_WINDOW_MINIMIZED;
if (_this->MinimizeWindow) {
_this->MinimizeWindow (_this, window);
}
919
920
}
921
922
void
SDL_RestoreWindow (SDL_WindowID windowID)
923
{
924
925
926
927
928
929
930
931
932
933
934
935
SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window
|| (window->flags & (SDL_WINDOW_MAXIMIZED | SDL_WINDOW_MINIMIZED))) {
return;
}
window->flags &= ~(SDL_WINDOW_MAXIMIZED | SDL_WINDOW_MINIMIZED);
if (_this->RestoreWindow) {
_this->RestoreWindow (_this, window);
}
936
}
937
938
939
void
SDL_SetWindowGrab (SDL_WindowID windowID, int mode)
940
{
941
942
943
944
945
946
947
948
949
950
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952
953
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955
SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window || (!!mode == !!(window->flags & SDL_WINDOW_INPUT_GRABBED))) {
return;
}
if (mode) {
window->flags |= SDL_WINDOW_INPUT_GRABBED;
} else {
window->flags &= ~SDL_WINDOW_INPUT_GRABBED;
}
if (_this->SetWindowGrab) {
_this->SetWindowGrab (_this, window);
}
956
957
}
958
959
int
SDL_GetWindowGrab (SDL_WindowID windowID)
960
{
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963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
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999
1000
SDL_Window *window = SDL_GetWindowFromID (windowID);
if (!window) {
return 0;
}
return ((window->flags & SDL_WINDOW_INPUT_GRABBED) != 0);
}
void
SDL_DestroyWindow (SDL_WindowID windowID)
{
int i, j;
if (!_this) {
return;
}
for (i = 0; i < _this->num_displays; ++i) {
SDL_VideoDisplay *display = &_this->displays[i];
for (j = 0; j < display->num_windows; ++j) {
SDL_Window *window = &display->windows[j];
if (window->id != windowID) {
continue;
}
if (window->flags & SDL_WINDOW_INPUT_GRABBED) {
window->flags &= ~SDL_WINDOW_INPUT_GRABBED;
_this->SetWindowGrab (_this, window);
}
if (window->shadow) {
SDL_FreeSurface (window->shadow);
}
if (window->surface) {
SDL_FreeSurface (window->surface);
}
if (_this->DestroyWindow) {
_this->DestroyWindow (_this, window);
}
if (window->title) {
SDL_free (window->title);