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SDL_video.c
1805 lines (1576 loc) · 43.1 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
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cmpmodes(const void *A, const void *B)
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{
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;
}
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if (SDL_BITSPERPIXEL(a.format) != SDL_BITSPERPIXEL(b.format)) {
return SDL_BITSPERPIXEL(b.format) - SDL_BITSPERPIXEL(a.format);
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}
if (a.refresh_rate != b.refresh_rate) {
return b.refresh_rate - a.refresh_rate;
}
return 0;
}
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int
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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 *
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SDL_GetVideoDriver(int index)
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{
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if (index >= 0 && index < SDL_GetNumVideoDrivers()) {
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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
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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) {
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SDL_SetError("OS doesn't support threaded events");
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return -1;
}
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#endif
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/* Check to make sure we don't overwrite '_this' */
if (_this != NULL) {
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SDL_VideoQuit();
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}
/* Select the proper video driver */
index = 0;
video = NULL;
if (driver_name != NULL) {
for (i = 0; bootstrap[i]; ++i) {
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if (SDL_strncmp(bootstrap[i]->name, driver_name,
SDL_strlen(bootstrap[i]->name)) == 0) {
if (bootstrap[i]->available()) {
video = bootstrap[i]->create(index);
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}
break;
}
}
} else {
for (i = 0; bootstrap[i]; ++i) {
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if (bootstrap[i]->available()) {
video = bootstrap[i]->create(index);
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if (video != NULL) {
break;
}
}
}
}
if (video == NULL) {
if (driver_name) {
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SDL_SetError("%s not available", driver_name);
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} else {
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SDL_SetError("No available video device");
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}
return -1;
}
_this = video;
_this->name = bootstrap[i]->name;
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_this->next_object_id = 1;
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/* 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 */
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if (_this->VideoInit(_this) < 0) {
SDL_VideoQuit();
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return -1;
}
/* Make sure some displays were added */
if (_this->num_displays == 0) {
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SDL_SetError("The video driver did not add any displays");
SDL_VideoQuit();
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return (-1);
}
/* Sort the video modes */
for (i = 0; i < _this->num_displays; ++i) {
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SDL_qsort(_this->displays[i].display_modes,
_this->displays[i].num_display_modes,
sizeof(SDL_DisplayMode), cmpmodes);
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}
/* Start the event loop */
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if (SDL_StartEventLoop(flags) < 0) {
SDL_VideoQuit();
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return -1;
}
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SDL_CursorInit(flags & SDL_INIT_EVENTTHREAD);
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/* We're ready to go! */
return 0;
}
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const char *
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SDL_GetCurrentVideoDriver()
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{
if (!_this) {
return NULL;
}
return _this->name;
}
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SDL_VideoDevice *
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SDL_GetVideoDevice()
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{
return _this;
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}
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void
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SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode)
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{
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SDL_VideoDisplay display;
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SDL_zero(display);
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if (desktop_mode) {
display.desktop_mode = *desktop_mode;
}
display.current_mode = display.desktop_mode;
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SDL_AddVideoDisplay(&display);
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}
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void
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SDL_AddVideoDisplay(const SDL_VideoDisplay * display)
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{
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SDL_VideoDisplay *displays;
displays =
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SDL_realloc(_this->displays,
(_this->num_displays + 1) * sizeof(*displays));
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if (displays) {
displays[_this->num_displays] = *display;
_this->displays = displays;
_this->num_displays++;
}
}
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int
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SDL_GetNumVideoDisplays(void)
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{
if (!_this) {
return 0;
}
return _this->num_displays;
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}
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int
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SDL_SelectVideoDisplay(int index)
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{
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if (!_this) {
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SDL_SetError("Video subsystem has not been initialized");
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return (-1);
}
if (index >= 0) {
if (index >= _this->num_displays) {
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SDL_SetError("index must be in the range 0 - %d",
_this->num_displays - 1);
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return -1;
}
_this->current_display = index;
}
return _this->current_display;
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}
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void
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SDL_AddDisplayMode(int displayIndex, const SDL_DisplayMode * mode)
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{
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SDL_VideoDisplay *display = &_this->displays[displayIndex];
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SDL_DisplayMode *modes;
int i, nmodes;
/* Make sure we don't already have the mode in the list */
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modes = display->display_modes;
nmodes = display->num_display_modes;
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for (i = 0; i < nmodes; ++i) {
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if (SDL_memcmp(mode, &modes[i], sizeof(*mode)) == 0) {
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return;
}
}
/* Go ahead and add the new mode */
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modes = SDL_realloc(modes, (nmodes + 1) * sizeof(*mode));
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if (modes) {
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display->display_modes = modes;
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modes[nmodes] = *mode;
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display->num_display_modes++;
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}
}
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int
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SDL_GetNumDisplayModes()
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{
if (_this) {
return SDL_CurrentDisplay.num_display_modes;
}
return 0;
}
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const SDL_DisplayMode *
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SDL_GetDisplayMode(int index)
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{
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if (index < 0 || index >= SDL_GetNumDisplayModes()) {
SDL_SetError("index must be in the range of 0 - %d",
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SDL_GetNumDisplayModes() - 1);
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return NULL;
}
return &SDL_CurrentDisplay.display_modes[index];
}
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const SDL_DisplayMode *
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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 *
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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 *
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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 ||
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(SDL_BITSPERPIXEL(current->format) >=
SDL_BITSPERPIXEL(target_format)
&& SDL_PIXELTYPE(current->format) ==
SDL_PIXELTYPE(target_format))) {
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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
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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) {
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SDL_SetError("Video subsystem has not been initialized");
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return -1;
}
/* Make sure there's an actual display mode to set */
if (!mode) {
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SDL_SetError("No mode passed to SDL_SetDisplayMode");
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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 */
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if (!SDL_GetClosestDisplayMode(&display_mode, &display_mode)) {
SDL_SetError("No video mode large enough for %dx%d",
display_mode.w, display_mode.h);
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return -1;
}
/* See if there's anything left to do */
if (SDL_memcmp
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(&display_mode, SDL_GetCurrentDisplayMode(),
sizeof(display_mode)) == 0) {
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return 0;
}
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return _this->SetDisplayMode(_this, &display_mode);
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}
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SDL_WindowID
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SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)
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{
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) {
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SDL_SetError("Video subsystem has not been initialized");
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return 0;
}
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SDL_zero(window);
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window.id = _this->next_object_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);
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if (_this->CreateWindow && _this->CreateWindow(_this, &window) < 0) {
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if (window.title) {
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SDL_free(window.title);
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}
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return 0;
}
num_windows = SDL_CurrentDisplay.num_windows;
windows =
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SDL_realloc(SDL_CurrentDisplay.windows,
(num_windows + 1) * sizeof(*windows));
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if (!windows) {
if (_this->DestroyWindow) {
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_this->DestroyWindow(_this, &window);
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}
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if (window.title) {
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SDL_free(window.title);
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}
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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
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SDL_CreateWindowFrom(void *data)
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{
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SDL_Window window;
int num_windows;
SDL_Window *windows;
if (!_this) {
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SDL_SetError("Video subsystem has not been initialized");
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return (0);
}
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SDL_zero(window);
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window.id = _this->next_object_id++;
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if (!_this->CreateWindowFrom ||
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_this->CreateWindowFrom(_this, &window, data) < 0) {
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return 0;
}
num_windows = SDL_CurrentDisplay.num_windows;
windows =
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SDL_realloc(SDL_CurrentDisplay.windows,
(num_windows + 1) * sizeof(*windows));
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if (!windows) {
if (_this->DestroyWindow) {
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_this->DestroyWindow(_this, &window);
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}
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if (window.title) {
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SDL_free(window.title);
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}
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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 *
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SDL_GetWindowFromID(SDL_WindowID windowID)
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{
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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Uint32
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SDL_GetWindowFlags(SDL_WindowID windowID)
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{
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SDL_Window *window = SDL_GetWindowFromID(windowID);
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if (!window) {
return 0;
}
return window->flags;
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}
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void
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SDL_SetWindowTitle(SDL_WindowID windowID, const char *title)
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{
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SDL_Window *window = SDL_GetWindowFromID(windowID);
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if (!window) {
return;
}
if (window->title) {
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SDL_free(window->title);
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}
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window->title = SDL_strdup(title);
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if (_this->SetWindowTitle) {
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_this->SetWindowTitle(_this, window);
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}
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}
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const char *
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SDL_GetWindowTitle(SDL_WindowID windowID)
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{
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SDL_Window *window = SDL_GetWindowFromID(windowID);
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if (!window) {
return NULL;
}
return window->title;
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}
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void
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SDL_SetWindowData(SDL_WindowID windowID, void *userdata)
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{
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SDL_Window *window = SDL_GetWindowFromID(windowID);
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if (!window) {
return;
}
window->userdata = userdata;
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}
723
void *
724
SDL_GetWindowData(SDL_WindowID windowID)
725
{
726
SDL_Window *window = SDL_GetWindowFromID(windowID);
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731
if (!window) {
return NULL;
}
return window->userdata;
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}
734
void
735
SDL_SetWindowPosition(SDL_WindowID windowID, int x, int y)
736
{
737
SDL_Window *window = SDL_GetWindowFromID(windowID);
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741
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746
if (!window) {
return;
}
window->x = x;
window->y = y;
if (_this->SetWindowPosition) {
747
_this->SetWindowPosition(_this, window);
748
}
749
750
}
751
void
752
SDL_GetWindowPosition(SDL_WindowID windowID, int *x, int *y)
753
{
754
SDL_Window *window = SDL_GetWindowFromID(windowID);
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764
if (!window) {
return;
}
if (x) {
*x = window->x;
}
if (y) {
*y = window->y;
}
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766
}
767
void
768
SDL_SetWindowSize(SDL_WindowID windowID, int w, int h)
769
{
770
SDL_Window *window = SDL_GetWindowFromID(windowID);
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if (!window) {
return;
}
window->w = w;
window->h = h;
if (_this->SetWindowSize) {
780
_this->SetWindowSize(_this, window);
781
}
782
783
}
784
void
785
SDL_GetWindowSize(SDL_WindowID windowID, int *w, int *h)
786
{
787
SDL_Window *window = SDL_GetWindowFromID(windowID);
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if (!window) {
return;
}
if (w) {
*w = window->w;
}
if (h) {
*h = window->h;
}
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799
}
800
void
801
SDL_ShowWindow(SDL_WindowID windowID)
802
{
803
SDL_Window *window = SDL_GetWindowFromID(windowID);
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811
if (!window || (window->flags & SDL_WINDOW_SHOWN)) {
return;
}
window->flags |= SDL_WINDOW_SHOWN;
if (_this->ShowWindow) {
812
_this->ShowWindow(_this, window);
813
}
814
815
}
816
void
817
SDL_HideWindow(SDL_WindowID windowID)
818
{
819
SDL_Window *window = SDL_GetWindowFromID(windowID);
820
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if (!window || !(window->flags & SDL_WINDOW_SHOWN)) {
return;
}
window->flags &= ~SDL_WINDOW_SHOWN;
if (_this->HideWindow) {
828
_this->HideWindow(_this, window);
829
}
830
831
}
832
void
833
SDL_RaiseWindow(SDL_WindowID windowID)
834
{
835
SDL_Window *window = SDL_GetWindowFromID(windowID);
836
837
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839
840
841
if (!window) {
return;
}
if (_this->RaiseWindow) {
842
_this->RaiseWindow(_this, window);
843
}
844
845
}
846
void
847
SDL_MaximizeWindow(SDL_WindowID windowID)
848
{
849
SDL_Window *window = SDL_GetWindowFromID(windowID);
850
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853
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855
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857
if (!window || (window->flags & SDL_WINDOW_MAXIMIZED)) {
return;
}
window->flags |= SDL_WINDOW_MAXIMIZED;
if (_this->MaximizeWindow) {
858
_this->MaximizeWindow(_this, window);
859
}
860
861
}
862
void
863
SDL_MinimizeWindow(SDL_WindowID windowID)
864
{
865
SDL_Window *window = SDL_GetWindowFromID(windowID);
866
867
868
869
870
871
872
873
if (!window || (window->flags & SDL_WINDOW_MINIMIZED)) {
return;
}
window->flags |= SDL_WINDOW_MINIMIZED;
if (_this->MinimizeWindow) {
874
_this->MinimizeWindow(_this, window);
875
}
876
877
}
878
void
879
SDL_RestoreWindow(SDL_WindowID windowID)
880
{
881
SDL_Window *window = SDL_GetWindowFromID(windowID);
882
883
884
885
886
887
888
889
890
if (!window
|| (window->flags & (SDL_WINDOW_MAXIMIZED | SDL_WINDOW_MINIMIZED))) {
return;
}
window->flags &= ~(SDL_WINDOW_MAXIMIZED | SDL_WINDOW_MINIMIZED);
if (_this->RestoreWindow) {
891
_this->RestoreWindow(_this, window);
892
}
893
}
894
895
void
896
SDL_SetWindowGrab(SDL_WindowID windowID, int mode)
897
{
898
SDL_Window *window = SDL_GetWindowFromID(windowID);
899
900
901
902
903
904
905
906
907
908
909
910
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) {
911
_this->SetWindowGrab(_this, window);
912
}
913
914
}
915
int
916
SDL_GetWindowGrab(SDL_WindowID windowID)
917
{
918
SDL_Window *window = SDL_GetWindowFromID(windowID);
919
920
921
922
923
924
925
926
927
if (!window) {
return 0;
}
return ((window->flags & SDL_WINDOW_INPUT_GRABBED) != 0);
}
void
928
SDL_DestroyWindow(SDL_WindowID windowID)
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
{
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;
945
_this->SetWindowGrab(_this, window);
946
}
947
948
if (window->renderer) {
SDL_DestroyRenderer(window->id);
949
950
}
if (_this->DestroyWindow) {
951
_this->DestroyWindow(_this, window);
952
953
}
if (window->title) {
954
SDL_free(window->title);
955
956
}
if (window->gamma) {
957
SDL_free(window->gamma);
958
959
}
if (j != display->num_windows - 1) {
960
961
962
SDL_memcpy(&display->windows[i],
&display->windows[i + 1],
(display->num_windows - i - 1) * sizeof(*window));
963
964
965
966
967
968
969
}
--display->num_windows;
return;
}
}
}
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
998
999
1000
void
SDL_AddRenderDriver(int displayIndex, const SDL_RenderDriver * driver)
{
SDL_VideoDisplay *display = &_this->displays[displayIndex];
SDL_RenderDriver *render_drivers;
render_drivers =
SDL_realloc(display->render_drivers,
(display->num_render_drivers +
1) * sizeof(*render_drivers));
if (render_drivers) {
render_drivers[display->num_render_drivers] = *driver;
display->render_drivers = render_drivers;
display->num_render_drivers++;
}
}
int
SDL_GetNumRenderers(void)
{
if (_this) {
return SDL_CurrentDisplay.num_render_drivers;
}
return 0;
}
int
SDL_GetRendererInfo(int index, SDL_RendererInfo * info)
{
if (index < 0 || index >= SDL_GetNumRenderers()) {
SDL_SetError("index must be in the range of 0 - %d",