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SDL_video.c
2276 lines (2017 loc) · 55.9 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 "../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_DIRECTFB
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&DirectFB_bootstrap,
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#endif
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#if SDL_VIDEO_DRIVER_WINDOWS
&WINDOWS_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_PANDORA
&PND_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_ANDROID
&Android_bootstrap,
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#endif
#if SDL_VIDEO_DRIVER_DUMMY
&DUMMY_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; \
}
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/* Various local functions */
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static void SDL_UpdateWindowGrab(SDL_Window * window);
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/* Support for framebuffer emulation using an accelerated renderer */
#define SDL_WINDOWTEXTUREDATA "_SDL_WindowTextureData"
typedef struct {
SDL_Renderer *renderer;
SDL_Texture *texture;
void *pixels;
int pitch;
} SDL_WindowTextureData;
static int
SDL_CreateWindowTexture(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch)
{
SDL_WindowTextureData *data;
SDL_Renderer *renderer;
SDL_RendererInfo info;
Uint32 i;
data = SDL_GetWindowData(window, SDL_WINDOWTEXTUREDATA);
if (!data) {
data = (SDL_WindowTextureData *)SDL_calloc(1, sizeof(*data));
if (!data) {
SDL_OutOfMemory();
return -1;
}
SDL_SetWindowData(window, SDL_WINDOWTEXTUREDATA, data);
}
renderer = data->renderer;
if (!renderer) {
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SDL_RendererInfo info;
int i;
/* We need to make sure we don't get a software renderer */
for (i = 0; i < SDL_GetNumRenderDrivers(); ++i) {
SDL_GetRenderDriverInfo(i, &info);
if (SDL_strcmp(info.name, "software") != 0) {
renderer = SDL_CreateRenderer(window, i, 0);
if (renderer) {
break;
}
}
}
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if (!renderer) {
return -1;
}
data->renderer = renderer;
}
/* Free any old texture and pixel data */
if (data->texture) {
SDL_DestroyTexture(data->texture);
data->texture = NULL;
}
if (data->pixels) {
SDL_free(data->pixels);
data->pixels = NULL;
}
if (SDL_GetRendererInfo(renderer, &info) < 0) {
return -1;
}
/* Find the first format without an alpha channel */
*format = info.texture_formats[0];
for (i = 0; i < info.num_texture_formats; ++i) {
if (!SDL_ISPIXELFORMAT_ALPHA(info.texture_formats[i])) {
*format = info.texture_formats[i];
break;
}
}
data->texture = SDL_CreateTexture(renderer, *format,
SDL_TEXTUREACCESS_STREAMING,
window->w, window->h);
if (!data->texture) {
return -1;
}
/* Create framebuffer data */
data->pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3);
data->pixels = SDL_malloc(window->h * data->pitch);
if (!data->pixels) {
SDL_OutOfMemory();
return -1;
}
*pixels = data->pixels;
*pitch = data->pitch;
return 0;
}
static int
SDL_UpdateWindowTexture(_THIS, SDL_Window * window, int numrects, SDL_Rect * rects)
{
SDL_WindowTextureData *data;
data = SDL_GetWindowData(window, SDL_WINDOWTEXTUREDATA);
if (!data || !data->texture) {
SDL_SetError("No window texture data");
return -1;
}
if (SDL_UpdateTexture(data->texture, NULL, data->pixels, data->pitch) < 0) {
return -1;
}
if (SDL_RenderCopy(data->renderer, data->texture, NULL, NULL) < 0) {
return -1;
}
SDL_RenderPresent(data->renderer);
return 0;
}
static void
SDL_DestroyWindowTexture(_THIS, SDL_Window * window)
{
SDL_WindowTextureData *data;
data = SDL_SetWindowData(window, SDL_WINDOWTEXTUREDATA, NULL);
if (!data) {
return;
}
if (data->texture) {
SDL_DestroyTexture(data->texture);
}
if (data->renderer) {
SDL_DestroyRenderer(data->renderer);
}
if (data->pixels) {
SDL_free(data->pixels);
}
SDL_free(data);
}
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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
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SDL_VideoInit(const char *driver_name)
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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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/* Start the event loop */
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if (SDL_StartEventLoop() < 0 ||
SDL_KeyboardInit() < 0 ||
SDL_MouseInit() < 0 ||
SDL_TouchInit() < 0 ||
SDL_QuitInit() < 0) {
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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;
}
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/* 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);
}
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/* Add the renderer framebuffer emulation if needed */
if (!_this->CreateWindowFramebuffer) {
_this->CreateWindowFramebuffer = SDL_CreateWindowTexture;
_this->UpdateWindowFramebuffer = SDL_UpdateWindowTexture;
_this->DestroyWindowFramebuffer = SDL_DestroyWindowTexture;
}
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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;
726
}
727
728
729
730
731
732
733
734
735
SDL_DisplayMode *
SDL_GetClosestDisplayMode(const SDL_DisplayMode * mode,
SDL_DisplayMode * closest)
{
if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
736
return SDL_GetClosestDisplayModeForDisplay(SDL_CurrentDisplay, mode, closest);
737
738
}
739
int
740
SDL_SetDisplayModeForDisplay(SDL_VideoDisplay * display, const SDL_DisplayMode * mode)
741
{
742
743
744
SDL_DisplayMode display_mode;
SDL_DisplayMode current_mode;
745
746
if (mode) {
display_mode = *mode;
747
748
749
750
751
752
753
754
755
756
757
758
759
760
/* 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;
}
761
762
763
764
765
766
767
768
769
/* 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;
770
}
771
772
/* See if there's anything left to do */
773
SDL_GetCurrentDisplayModeForDisplay(display, ¤t_mode);
774
775
776
if (SDL_memcmp(&display_mode, ¤t_mode, sizeof(display_mode)) == 0) {
return 0;
}
777
778
/* Actually change the display mode */
779
780
781
782
if (!_this->SetDisplayMode) {
SDL_SetError("Video driver doesn't support changing display mode");
return -1;
}
783
if (_this->SetDisplayMode(_this, display, &display_mode) < 0) {
784
785
786
787
return -1;
}
display->current_mode = display_mode;
return 0;
788
789
}
790
int
791
SDL_SetWindowDisplayMode(SDL_Window * window, const SDL_DisplayMode * mode)
792
{
793
CHECK_WINDOW_MAGIC(window, -1);
794
795
796
797
798
if (mode) {
window->fullscreen_mode = *mode;
} else {
SDL_zero(window->fullscreen_mode);
799
}
800
return 0;
801
802
}
803
int
804
SDL_GetWindowDisplayMode(SDL_Window * window, SDL_DisplayMode * mode)
805
{
806
807
SDL_DisplayMode fullscreen_mode;
808
CHECK_WINDOW_MAGIC(window, -1);
809
810
811
812
813
814
815
816
817
fullscreen_mode = window->fullscreen_mode;
if (!fullscreen_mode.w) {
fullscreen_mode.w = window->w;
}
if (!fullscreen_mode.h) {
fullscreen_mode.h = window->h;
}
818
if (!SDL_GetClosestDisplayModeForDisplay(window->display,
819
820
821
822
823
824
&fullscreen_mode,
&fullscreen_mode)) {
SDL_SetError("Couldn't find display mode match");
return -1;
}
825
if (mode) {
826
*mode = fullscreen_mode;
827
828
}
return 0;
829
}
830
831
832
833
834
835
836
837
838
Uint32
SDL_GetWindowPixelFormat(SDL_Window * window)
{
SDL_VideoDisplay *display = window->display;
SDL_DisplayMode *displayMode = &display->current_mode;
return displayMode->format;
}
839
840
841
static void
SDL_UpdateFullscreenMode(SDL_Window * window, SDL_bool attempt)
{
842
SDL_VideoDisplay *display = window->display;
843
844
845
846
847
848
849
850
851
852
853
854
855
856
/* 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) {
857
SDL_RestoreWindow(window);
858
} else {
859
SDL_RaiseWindow(window);
860
861
862
}
} else {
/* We just lost some state, try to release all states */
863
SDL_MinimizeWindow(window);
864
865
866
867
868
}
}
if (FULLSCREEN_VISIBLE(window)) {
/* Hide any other fullscreen windows */
869
870
SDL_Window *other;
for (other = display->windows; other; other = other->next) {
871
if (other != window && FULLSCREEN_VISIBLE(other)) {
872
SDL_MinimizeWindow(other);
873
874
875
876
877
878
879
}
}
}
display->updating_fullscreen = SDL_FALSE;
/* See if there are any fullscreen windows */
880
for (window = display->windows; window; window = window->next) {
881
882
if (FULLSCREEN_VISIBLE(window)) {
SDL_DisplayMode fullscreen_mode;
883
if (SDL_GetWindowDisplayMode(window, &fullscreen_mode) == 0) {
884
SDL_SetDisplayModeForDisplay(display, &fullscreen_mode);
885
display->fullscreen_window = window;
886
887
888
889
890
891
892
return;
}
}
}
/* Nope, restore the desktop mode */
SDL_SetDisplayModeForDisplay(display, NULL);
893
display->fullscreen_window = NULL;
894
895
}
896
SDL_Window *
897
898
SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)
{
899
900
901
const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
SDL_WINDOW_OPENGL |
SDL_WINDOW_BORDERLESS |
902
903
SDL_WINDOW_RESIZABLE |
SDL_WINDOW_INPUT_GRABBED);
904
SDL_VideoDisplay *display;
905
SDL_Window *window;
906
907
if (!_this) {
908
/* Initialize the video system if needed */
909
if (SDL_VideoInit(NULL) < 0) {
910
return NULL;
911
}
912
}
913
914
915
if (flags & SDL_WINDOW_OPENGL) {
if (!_this->GL_CreateContext) {
SDL_SetError("No OpenGL support in video driver");
916
return NULL;
917
918
}
SDL_GL_LoadLibrary(NULL);
919
}
920
921
display = SDL_CurrentDisplay;
window = (SDL_Window *)SDL_calloc(1, sizeof(*window));
922
window->magic = &_this->window_magic;
923
924
925
926
927
928
929
930
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;
931
932
933
if (display->windows) {
display->windows->prev = window;
}
934
display->windows = window;
935
936
937
938
if (_this->CreateWindow && _this->CreateWindow(_this, window) < 0) {
SDL_DestroyWindow(window);
return NULL;
939
940
941
}
if (title) {
942
SDL_SetWindowTitle(window, title);
943
944
}
if (flags & SDL_WINDOW_MAXIMIZED) {
945
SDL_MaximizeWindow(window);
946
947
}
if (flags & SDL_WINDOW_MINIMIZED) {
948
SDL_MinimizeWindow(window);
949
950
}
if (flags & SDL_WINDOW_SHOWN) {
951
SDL_ShowWindow(window);
952
}
953
SDL_UpdateWindowGrab(window);
954
955
return window;
956
957
}
958
SDL_Window *
959
960
SDL_CreateWindowFrom(const void *data)
{
961
SDL_VideoDisplay *display;
962
SDL_Window *window;
963
964
965
if (!_this) {
SDL_UninitializedVideo();
966
return NULL;
967
}
968
969
display = SDL_CurrentDisplay;
window = (SDL_Window *)SDL_calloc(1, sizeof(*window));
970
window->magic = &_this->window_magic;
971
972
973
974
window->id = _this->next_object_id++;
window->flags = SDL_WINDOW_FOREIGN;
window->display = display;
window->next = display->windows;
975
976
977
if (display->windows) {
display->windows->prev = window;
}
978
display->windows = window;
979
980
if (!_this->CreateWindowFrom ||
981
982
983
_this->CreateWindowFrom(_this, window, data) < 0) {
SDL_DestroyWindow(window);
return NULL;
984
}
985
return window;
986
987
}
988
int
989
SDL_RecreateWindow(SDL_Window * window, Uint32 flags)
990
{
991
992
993
994
const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
SDL_WINDOW_OPENGL |
SDL_WINDOW_BORDERLESS |
SDL_WINDOW_RESIZABLE |
995
996
SDL_WINDOW_INPUT_GRABBED |
SDL_WINDOW_FOREIGN);
997
998
999
1000
char *title = window->title;
if ((flags & SDL_WINDOW_OPENGL) && !_this->GL_CreateContext) {
SDL_SetError("No OpenGL support in video driver");