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SDL_video.c
3428 lines (3042 loc) · 85.9 KB
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 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 */
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#include "SDL.h"
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#include "SDL_video.h"
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#include "SDL_sysvideo.h"
#include "SDL_blit.h"
#include "SDL_pixels_c.h"
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#include "SDL_renderer_gl.h"
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#include "SDL_renderer_gles.h"
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#include "SDL_renderer_sw.h"
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#include "../events/SDL_sysevents.h"
#include "../events/SDL_events_c.h"
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#if SDL_VIDEO_OPENGL_ES
#include "SDL_opengles.h"
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#endif /* SDL_VIDEO_OPENGL_ES */
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#if SDL_VIDEO_OPENGL
#include "SDL_opengl.h"
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#endif /* SDL_VIDEO_OPENGL */
#include "SDL_syswm.h"
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/* On Windows, windows.h defines CreateWindow */
#ifdef CreateWindow
#undef CreateWindow
#endif
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/* Available video drivers */
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static VideoBootStrap *bootstrap[] = {
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#if SDL_VIDEO_DRIVER_COCOA
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&COCOA_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_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_PS3
&PS3_bootstrap,
#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_WIN32
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&WIN32_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_PHOTON
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&photon_bootstrap,
#endif
#if SDL_VIDEO_DRIVER_QNXGF
&qnxgf_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_RISCOS
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&RISCOS_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_NDS
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&NDS_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_UIKIT
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&UIKIT_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_DUMMY
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&DUMMY_bootstrap,
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#endif
#if SDL_VIDEO_DRIVER_PANDORA
&PND_bootstrap,
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#endif
#if SDL_VIDEO_DRIVER_ANDROID
&Android_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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#define CHECK_WINDOW_MAGIC(window, retval) \
if (!_this) { \
SDL_UninitializedVideo(); \
return retval; \
} \
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if (!window || window->magic != &_this->window_magic) { \
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SDL_SetError("Invalid window"); \
return retval; \
}
#define CHECK_TEXTURE_MAGIC(texture, retval) \
if (!_this) { \
SDL_UninitializedVideo(); \
return retval; \
} \
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if (!texture || texture->magic != &_this->texture_magic) { \
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SDL_SetError("Invalid texture"); \
return retval; \
}
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/* Various local functions */
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static void SDL_UpdateWindowGrab(SDL_Window * window);
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static int
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;
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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);
}
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if (SDL_PIXELLAYOUT(a.format) != SDL_PIXELLAYOUT(b.format)) {
return SDL_PIXELLAYOUT(b.format) - SDL_PIXELLAYOUT(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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}
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static void
SDL_UninitializedVideo()
{
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SDL_SetError("Video subsystem has not been initialized");
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}
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int
SDL_GetNumVideoDrivers(void)
{
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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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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;
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/* Check to make sure we don't overwrite '_this' */
if (_this != NULL) {
SDL_VideoQuit();
}
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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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/* Start the event loop */
if (SDL_StartEventLoop(flags) < 0) {
return -1;
}
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/* Select the proper video driver */
index = 0;
video = NULL;
if (driver_name == NULL) {
driver_name = SDL_getenv("SDL_VIDEODRIVER");
}
if (driver_name != NULL) {
for (i = 0; bootstrap[i]; ++i) {
if (SDL_strcasecmp(bootstrap[i]->name, driver_name) == 0) {
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video = bootstrap[i]->create(index);
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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_object_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.retained_backing = 1;
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_this->gl_config.accelerated = -1; /* accelerated or not, both are fine */
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_this->gl_config.major_version = 2;
_this->gl_config.minor_version = 1;
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/* 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);
}
/* The software renderer is always available */
for (i = 0; i < _this->num_displays; ++i) {
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SDL_VideoDisplay *display = &_this->displays[i];
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if (_this->GL_CreateContext) {
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#if SDL_VIDEO_RENDER_OGL
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SDL_AddRenderDriver(display, &GL_RenderDriver);
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#endif
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#if SDL_VIDEO_RENDER_OGL_ES
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SDL_AddRenderDriver(display, &GL_ES_RenderDriver);
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#endif
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}
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if (display->num_render_drivers > 0) {
SDL_AddRenderDriver(display, &SW_RenderDriver);
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}
}
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/* We're ready to go! */
return 0;
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}
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const char *
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SDL_GetCurrentVideoDriver()
{
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if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
return _this->name;
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}
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SDL_VideoDevice *
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SDL_GetVideoDevice(void)
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{
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return _this;
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}
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int
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);
if (desktop_mode) {
display.desktop_mode = *desktop_mode;
}
display.current_mode = display.desktop_mode;
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return SDL_AddVideoDisplay(&display);
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}
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int
SDL_AddVideoDisplay(const SDL_VideoDisplay * display)
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{
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SDL_VideoDisplay *displays;
int index = -1;
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displays =
SDL_realloc(_this->displays,
(_this->num_displays + 1) * sizeof(*displays));
if (displays) {
index = _this->num_displays++;
displays[index] = *display;
displays[index].device = _this;
_this->displays = displays;
} else {
SDL_OutOfMemory();
}
return index;
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}
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int
SDL_GetNumVideoDisplays(void)
{
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if (!_this) {
SDL_UninitializedVideo();
return 0;
}
return _this->num_displays;
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}
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int
SDL_GetDisplayBounds(int index, SDL_Rect * rect)
{
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
if (index < 0 || index >= _this->num_displays) {
SDL_SetError("index must be in the range 0 - %d",
_this->num_displays - 1);
return -1;
}
if (rect) {
SDL_VideoDisplay *display = &_this->displays[index];
if (_this->GetDisplayBounds) {
if (_this->GetDisplayBounds(_this, display, rect) < 0) {
return -1;
}
} else {
/* Assume that the displays are left to right */
if (index == 0) {
rect->x = 0;
rect->y = 0;
} else {
SDL_GetDisplayBounds(index-1, rect);
rect->x += rect->w;
}
rect->w = display->desktop_mode.w;
rect->h = display->desktop_mode.h;
}
}
return 0;
}
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int
SDL_SelectVideoDisplay(int index)
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{
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if (!_this) {
SDL_UninitializedVideo();
return (-1);
}
if (index < 0 || 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 0;
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}
int
SDL_GetCurrentVideoDisplay(void)
{
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if (!_this) {
SDL_UninitializedVideo();
return (-1);
}
return _this->current_display;
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}
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SDL_bool
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SDL_AddDisplayMode(SDL_VideoDisplay * display, const SDL_DisplayMode * mode)
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{
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SDL_DisplayMode *modes;
int i, nmodes;
/* Make sure we don't already have the mode in the list */
modes = display->display_modes;
nmodes = display->num_display_modes;
for (i = nmodes; i--;) {
if (SDL_memcmp(mode, &modes[i], sizeof(*mode)) == 0) {
return SDL_FALSE;
}
}
/* Go ahead and add the new mode */
if (nmodes == display->max_display_modes) {
modes =
SDL_realloc(modes,
(display->max_display_modes + 32) * sizeof(*modes));
if (!modes) {
return SDL_FALSE;
}
display->display_modes = modes;
display->max_display_modes += 32;
}
modes[nmodes] = *mode;
display->num_display_modes++;
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/* Re-sort video modes */
SDL_qsort(display->display_modes, display->num_display_modes,
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sizeof(SDL_DisplayMode), cmpmodes);
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return SDL_TRUE;
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}
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int
SDL_GetNumDisplayModesForDisplay(SDL_VideoDisplay * display)
{
if (!display->num_display_modes && _this->GetDisplayModes) {
_this->GetDisplayModes(_this, display);
SDL_qsort(display->display_modes, display->num_display_modes,
sizeof(SDL_DisplayMode), cmpmodes);
}
return display->num_display_modes;
}
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int
SDL_GetNumDisplayModes()
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{
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if (_this) {
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return SDL_GetNumDisplayModesForDisplay(SDL_CurrentDisplay);
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}
return 0;
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}
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int
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SDL_GetDisplayModeForDisplay(SDL_VideoDisplay * display, int index, SDL_DisplayMode * mode)
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{
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if (index < 0 || index >= SDL_GetNumDisplayModesForDisplay(display)) {
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SDL_SetError("index must be in the range of 0 - %d",
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SDL_GetNumDisplayModesForDisplay(display) - 1);
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return -1;
}
if (mode) {
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*mode = display->display_modes[index];
}
return 0;
}
int
SDL_GetDisplayMode(int index, SDL_DisplayMode * mode)
{
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return SDL_GetDisplayModeForDisplay(SDL_CurrentDisplay, index, mode);
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}
int
SDL_GetDesktopDisplayModeForDisplay(SDL_VideoDisplay * display, SDL_DisplayMode * mode)
{
if (mode) {
*mode = display->desktop_mode;
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}
return 0;
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}
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int
SDL_GetDesktopDisplayMode(SDL_DisplayMode * mode)
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{
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if (!_this) {
SDL_UninitializedVideo();
return -1;
}
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return SDL_GetDesktopDisplayModeForDisplay(SDL_CurrentDisplay, mode);
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}
int
SDL_GetCurrentDisplayModeForDisplay(SDL_VideoDisplay * display, SDL_DisplayMode * mode)
{
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if (mode) {
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*mode = display->current_mode;
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}
return 0;
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}
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int
SDL_GetCurrentDisplayMode(SDL_DisplayMode * mode)
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{
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if (!_this) {
SDL_UninitializedVideo();
return -1;
}
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return SDL_GetCurrentDisplayModeForDisplay(SDL_CurrentDisplay, mode);
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}
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SDL_DisplayMode *
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SDL_GetClosestDisplayModeForDisplay(SDL_VideoDisplay * display,
const SDL_DisplayMode * mode,
SDL_DisplayMode * closest)
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{
Uint32 target_format;
int target_refresh_rate;
int i;
SDL_DisplayMode *current, *match;
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if (!mode || !closest) {
SDL_SetError("Missing desired mode or closest mode parameter");
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return NULL;
}
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/* Default to the desktop format */
if (mode->format) {
target_format = mode->format;
} else {
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target_format = display->desktop_mode.format;
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}
/* Default to the desktop refresh rate */
if (mode->refresh_rate) {
target_refresh_rate = mode->refresh_rate;
} else {
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target_refresh_rate = display->desktop_mode.refresh_rate;
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}
match = NULL;
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for (i = 0; i < SDL_GetNumDisplayModesForDisplay(display); ++i) {
current = &display->display_modes[i];
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if (current->w && (current->w < mode->w)) {
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/* Out of sorted modes large enough here */
break;
}
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if (current->h && (current->h < mode->h)) {
if (current->w && (current->w == mode->w)) {
/* Out of sorted modes large enough here */
break;
}
/* Wider, but not tall enough, due to a different
aspect ratio. This mode must be skipped, but closer
modes may still follow. */
continue;
}
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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;
}
closest->driverdata = match->driverdata;
/*
* Pick some reasonable defaults if the app and driver don't
* care
*/
if (!closest->format) {
closest->format = SDL_PIXELFORMAT_RGB888;
}
if (!closest->w) {
closest->w = 640;
}
if (!closest->h) {
closest->h = 480;
}
return closest;
}
return NULL;
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}
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SDL_DisplayMode *
SDL_GetClosestDisplayMode(const SDL_DisplayMode * mode,
SDL_DisplayMode * closest)
{
if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
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return SDL_GetClosestDisplayModeForDisplay(SDL_CurrentDisplay, mode, closest);
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}
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int
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SDL_SetDisplayModeForDisplay(SDL_VideoDisplay * display, const SDL_DisplayMode * mode)
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{
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SDL_DisplayMode display_mode;
SDL_DisplayMode current_mode;
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int ncolors;
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if (mode) {
display_mode = *mode;
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/* Default to the current mode */
if (!display_mode.format) {
display_mode.format = display->current_mode.format;
}
if (!display_mode.w) {
display_mode.w = display->current_mode.w;
}
if (!display_mode.h) {
display_mode.h = display->current_mode.h;
}
if (!display_mode.refresh_rate) {
display_mode.refresh_rate = display->current_mode.refresh_rate;
}
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/* Get a good video mode, the closest one possible */
if (!SDL_GetClosestDisplayModeForDisplay(display, &display_mode, &display_mode)) {
SDL_SetError("No video mode large enough for %dx%d",
display_mode.w, display_mode.h);
return -1;
}
} else {
display_mode = display->desktop_mode;
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}
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/* See if there's anything left to do */
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SDL_GetCurrentDisplayModeForDisplay(display, ¤t_mode);
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if (SDL_memcmp(&display_mode, ¤t_mode, sizeof(display_mode)) == 0) {
return 0;
}
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/* Actually change the display mode */
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if (_this->SetDisplayMode(_this, display, &display_mode) < 0) {
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return -1;
}
display->current_mode = display_mode;
/* Set up a palette, if necessary */
if (SDL_ISPIXELFORMAT_INDEXED(display_mode.format)) {
ncolors = (1 << SDL_BITSPERPIXEL(display_mode.format));
} else {
ncolors = 0;
}
if ((!ncolors && display->palette) || (ncolors && !display->palette)
|| (ncolors && ncolors != display->palette->ncolors)) {
if (display->palette) {
SDL_FreePalette(display->palette);
display->palette = NULL;
}
if (ncolors) {
display->palette = SDL_AllocPalette(ncolors);
if (!display->palette) {
return -1;
}
SDL_DitherColors(display->palette->colors,
SDL_BITSPERPIXEL(display_mode.format));
}
}
return 0;
720
721
}
722
int
723
SDL_SetWindowDisplayMode(SDL_Window * window, const SDL_DisplayMode * mode)
724
{
725
CHECK_WINDOW_MAGIC(window, -1);
726
727
728
729
730
if (mode) {
window->fullscreen_mode = *mode;
} else {
SDL_zero(window->fullscreen_mode);
731
}
732
return 0;
733
734
}
735
int
736
SDL_GetWindowDisplayMode(SDL_Window * window, SDL_DisplayMode * mode)
737
{
738
739
SDL_DisplayMode fullscreen_mode;
740
CHECK_WINDOW_MAGIC(window, -1);
741
742
743
744
745
746
747
748
749
fullscreen_mode = window->fullscreen_mode;
if (!fullscreen_mode.w) {
fullscreen_mode.w = window->w;
}
if (!fullscreen_mode.h) {
fullscreen_mode.h = window->h;
}
750
if (!SDL_GetClosestDisplayModeForDisplay(window->display,
751
752
753
754
755
756
&fullscreen_mode,
&fullscreen_mode)) {
SDL_SetError("Couldn't find display mode match");
return -1;
}
757
if (mode) {
758
*mode = fullscreen_mode;
759
760
}
return 0;
761
}
762
763
764
765
static void
SDL_UpdateFullscreenMode(SDL_Window * window, SDL_bool attempt)
{
766
SDL_VideoDisplay *display = window->display;
767
768
769
770
771
772
773
774
775
776
777
778
779
780
/* See if we're already processing a window */
if (display->updating_fullscreen) {
return;
}
display->updating_fullscreen = SDL_TRUE;
/* See if we even want to do anything here */
if ((window->flags & SDL_WINDOW_FULLSCREEN) &&
(window->flags & SDL_WINDOW_SHOWN)) {
if (attempt) {
/* We just gained some state, try to gain all states */
if (window->flags & SDL_WINDOW_MINIMIZED) {
781
SDL_RestoreWindow(window);
782
} else {
783
SDL_RaiseWindow(window);
784
785
786
}
} else {
/* We just lost some state, try to release all states */
787
SDL_MinimizeWindow(window);
788
789
790
791
792
}
}
if (FULLSCREEN_VISIBLE(window)) {
/* Hide any other fullscreen windows */
793
794
SDL_Window *other;
for (other = display->windows; other; other = other->next) {
795
if (other != window && FULLSCREEN_VISIBLE(other)) {
796
SDL_MinimizeWindow(other);
797
798
799
800
801
802
803
}
}
}
display->updating_fullscreen = SDL_FALSE;
/* See if there are any fullscreen windows */
804
for (window = display->windows; window; window = window->next) {
805
806
if (FULLSCREEN_VISIBLE(window)) {
SDL_DisplayMode fullscreen_mode;
807
if (SDL_GetWindowDisplayMode(window, &fullscreen_mode) == 0) {
808
SDL_SetDisplayModeForDisplay(display, &fullscreen_mode);
809
display->fullscreen_window = window;
810
811
812
813
814
815
816
return;
}
}
}
/* Nope, restore the desktop mode */
SDL_SetDisplayModeForDisplay(display, NULL);
817
display->fullscreen_window = NULL;
818
819
}
820
int
821
SDL_SetPaletteForDisplay(SDL_VideoDisplay * display, const SDL_Color * colors, int firstcolor, int ncolors)
822
{
823
824
SDL_Palette *palette;
int status = 0;
825
826
palette = display->palette;
827
828
829
830
831
if (!palette) {
SDL_SetError("Display mode does not have a palette");
return -1;
}
status = SDL_SetPaletteColors(palette, colors, firstcolor, ncolors);
832
833
if (_this->SetDisplayPalette) {
834
if (_this->SetDisplayPalette(_this, display, palette) < 0) {
835
836
837
838
status = -1;
}
}
return status;
839
}
840
841
int
842
SDL_SetDisplayPalette(const SDL_Color * colors, int firstcolor, int ncolors)
843
{
844
845
846
847
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
848
return SDL_SetPaletteForDisplay(SDL_CurrentDisplay, colors, firstcolor, ncolors);
849
850
851
}
int
852
SDL_GetPaletteForDisplay(SDL_VideoDisplay * display, SDL_Color * colors, int firstcolor, int ncolors)
853
854
855
856
857
{
SDL_Palette *palette;
palette = display->palette;
if (!palette || !palette->ncolors) {
858
859
860
861
862
863
864
865
866
867
SDL_SetError("Display mode does not have a palette");
return -1;
}
if (firstcolor < 0 || (firstcolor + ncolors) > palette->ncolors) {
SDL_SetError("Palette indices are out of range");
return -1;
}
SDL_memcpy(colors, &palette->colors[firstcolor],
ncolors * sizeof(*colors));
return 0;
868
}
869
870
871
872
873
874
875
876
int
SDL_GetDisplayPalette(SDL_Color * colors, int firstcolor, int ncolors)
{
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
877
return SDL_GetPaletteForDisplay(SDL_CurrentDisplay, colors, firstcolor, ncolors);
878
879
}
880
SDL_Window *
881
882
SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)
{
883
884
885
const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
SDL_WINDOW_OPENGL |
SDL_WINDOW_BORDERLESS |
886
887
SDL_WINDOW_RESIZABLE |
SDL_WINDOW_INPUT_GRABBED);
888
SDL_VideoDisplay *display;
889
SDL_Window *window;
890
891
if (!_this) {
892
893
/* Initialize the video system if needed */
if (SDL_VideoInit(NULL, 0) < 0) {
894
return NULL;
895
}
896
}
897
898
899
if (flags & SDL_WINDOW_OPENGL) {
if (!_this->GL_CreateContext) {
SDL_SetError("No OpenGL support in video driver");
900
return NULL;
901
902
}
SDL_GL_LoadLibrary(NULL);
903
}
904
905
display = SDL_CurrentDisplay;
window = (SDL_Window *)SDL_calloc(1, sizeof(*window));
906
window->magic = &_this->window_magic;
907
908
909
910
911
912
913
914
window->id = _this->next_object_id++;
window->x = x;
window->y = y;
window->w = w;
window->h = h;
window->flags = (flags & allowed_flags);
window->display = display;
window->next = display->windows;
915
916
917
if (display->windows) {
display->windows->prev = window;
}
918
display->windows = window;
919
920
921
922
if (_this->CreateWindow && _this->CreateWindow(_this, window) < 0) {
SDL_DestroyWindow(window);
return NULL;
923
924
925
}
if (title) {
926
SDL_SetWindowTitle(window, title);
927
928
}
if (flags & SDL_WINDOW_MAXIMIZED) {
929
SDL_MaximizeWindow(window);
930
931
}
if (flags & SDL_WINDOW_MINIMIZED) {
932
SDL_MinimizeWindow(window);
933
934
}
if (flags & SDL_WINDOW_SHOWN) {
935
SDL_ShowWindow(window);
936
}
937
SDL_UpdateWindowGrab(window);
938
939
return window;
940
941
}
942
SDL_Window *
943
944
SDL_CreateWindowFrom(const void *data)
{
945
SDL_VideoDisplay *display;
946
SDL_Window *window;
947
948
949
if (!_this) {
SDL_UninitializedVideo();
950
return NULL;
951
}
952
953
display = SDL_CurrentDisplay;
window = (SDL_Window *)SDL_calloc(1, sizeof(*window));
954
window->magic = &_this->window_magic;
955
956
957
958
window->id = _this->next_object_id++;
window->flags = SDL_WINDOW_FOREIGN;
window->display = display;
window->next = display->windows;
959
960
961
if (display->windows) {
display->windows->prev = window;
}
962
display->windows = window;
963
964
if (!_this->CreateWindowFrom ||
965
966
967
_this->CreateWindowFrom(_this, window, data) < 0) {
SDL_DestroyWindow(window);
return NULL;
968
}
969
return window;
970
971
}
972
int
973
SDL_RecreateWindow(SDL_Window * window, Uint32 flags)
974
{
975
976
977
978
const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
SDL_WINDOW_OPENGL |
SDL_WINDOW_BORDERLESS |
SDL_WINDOW_RESIZABLE |
979
980
SDL_WINDOW_INPUT_GRABBED |
SDL_WINDOW_FOREIGN);
981
982
983
984
985
986
char *title = window->title;
if ((flags & SDL_WINDOW_OPENGL) && !_this->GL_CreateContext) {
SDL_SetError("No OpenGL support in video driver");
return -1;
}
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
if ((window->flags & SDL_WINDOW_OPENGL) != (flags & SDL_WINDOW_OPENGL)) {
if (flags & SDL_WINDOW_OPENGL) {
SDL_GL_LoadLibrary(NULL);
} else {
SDL_GL_UnloadLibrary();
}
}
if (window->flags & SDL_WINDOW_FOREIGN) {
/* Can't destroy and re-create foreign windows, hrm */
flags |= SDL_WINDOW_FOREIGN;
} else {
flags &= ~SDL_WINDOW_FOREIGN;
}