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SDL_video.c
2402 lines (2131 loc) · 59.7 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;
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int bytes_per_pixel;
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} SDL_WindowTextureData;
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static SDL_bool
ShouldUseTextureFramebuffer()
{
const char *hint;
/* If there's no native framebuffer support then there's no option */
if (!_this->CreateWindowFramebuffer) {
return SDL_TRUE;
}
/* See if the user or application wants a specific behavior */
hint = SDL_GetHint(SDL_HINT_FRAMEBUFFER_ACCELERATION);
if (hint) {
if (*hint == '0') {
return SDL_FALSE;
} else {
return SDL_TRUE;
}
}
/* Each platform has different performance characteristics */
#if defined(__WIN32__)
/* GDI BitBlt() is way faster than Direct3D dynamic textures right now.
*/
return SDL_FALSE;
#elif defined(__MACOSX__)
/* Mac OS X uses OpenGL as the native fast path */
return SDL_TRUE;
#elif defined(__LINUX__)
/* Properly configured OpenGL drivers are faster than MIT-SHM */
#if SDL_VIDEO_OPENGL
/* Ugh, find a way to cache this value! */
{
SDL_Window *window;
SDL_GLContext context;
SDL_bool hasAcceleratedOpenGL = SDL_FALSE;
window = SDL_CreateWindow("OpenGL test", -32, -32, 32, 32, SDL_WINDOW_OPENGL);
if (window) {
context = SDL_GL_CreateContext(window);
if (context) {
const GLubyte *(APIENTRY * glGetStringFunc) (GLenum);
const char *vendor = NULL;
glGetStringFunc = SDL_GL_GetProcAddress("glGetString");
if (glGetStringFunc) {
vendor = (const char *) glGetStringFunc(GL_VENDOR);
}
/* Add more vendors here at will... */
if (vendor &&
(SDL_strstr(vendor, "ATI Technologies") ||
SDL_strstr(vendor, "NVIDIA"))) {
hasAcceleratedOpenGL = SDL_TRUE;
}
SDL_GL_DeleteContext(context);
}
SDL_DestroyWindow(window);
}
return hasAcceleratedOpenGL;
}
#else
return SDL_FALSE;
#endif
#else
/* Play it safe, assume that if there is a framebuffer driver that it's
optimized for the current platform.
*/
return SDL_FALSE;
#endif
}
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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;
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const char *hint = SDL_GetHint(SDL_HINT_FRAMEBUFFER_ACCELERATION);
/* Check to see if there's a specific driver requested */
if (hint && *hint != '0' && *hint != '1' &&
SDL_strcasecmp(hint, "software") != 0) {
for (i = 0; i < SDL_GetNumRenderDrivers(); ++i) {
SDL_GetRenderDriverInfo(i, &info);
if (SDL_strcasecmp(info.name, hint) == 0) {
renderer = SDL_CreateRenderer(window, i, 0);
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break;
}
}
}
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if (!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 */
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data->bytes_per_pixel = SDL_BYTESPERPIXEL(*format);
data->pitch = (((window->w * data->bytes_per_pixel) + 3) & ~3);
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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;
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#ifdef UPDATE_TEXTURE_SUBRECTS
void *src, *dst;
int src_pitch;
int dst_pitch;
int i, row, length;
#endif
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data = SDL_GetWindowData(window, SDL_WINDOWTEXTUREDATA);
if (!data || !data->texture) {
SDL_SetError("No window texture data");
return -1;
}
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#ifdef UPDATE_TEXTURE_SUBRECTS
src_pitch = data->pitch;
for (i = 0; i < numrects; ++i) {
src = (void *)((Uint8 *)data->pixels +
rects[i].y * src_pitch +
rects[i].x * data->bytes_per_pixel);
if (SDL_LockTexture(data->texture, &rects[i], &dst, &dst_pitch) < 0) {
return -1;
}
length = rects[i].w * data->bytes_per_pixel;
for (row = rects[i].h; row--; ) {
SDL_memcpy(dst, src, length);
src = (Uint8*)src + src_pitch;
dst = (Uint8*)dst + dst_pitch;
}
SDL_UnlockTexture(data->texture);
}
#else
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if (SDL_UpdateTexture(data->texture, NULL, data->pixels, data->pitch) < 0) {
return -1;
}
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#endif
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if (SDL_RenderCopy(data->renderer, data->texture, NULL, NULL) < 0) {
return -1;
}
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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 desired */
if (ShouldUseTextureFramebuffer()) {
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_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;
707
708
}
709
710
int
SDL_GetDesktopDisplayMode(SDL_DisplayMode * mode)
711
{
712
713
714
715
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
716
return SDL_GetDesktopDisplayModeForDisplay(SDL_CurrentDisplay, mode);
717
718
719
720
721
}
int
SDL_GetCurrentDisplayModeForDisplay(SDL_VideoDisplay * display, SDL_DisplayMode * mode)
{
722
if (mode) {
723
*mode = display->current_mode;
724
725
}
return 0;
726
}
727
728
729
int
SDL_GetCurrentDisplayMode(SDL_DisplayMode * mode)
730
{
731
732
733
734
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
735
return SDL_GetCurrentDisplayModeForDisplay(SDL_CurrentDisplay, mode);
736
}
737
738
SDL_DisplayMode *
739
740
741
SDL_GetClosestDisplayModeForDisplay(SDL_VideoDisplay * display,
const SDL_DisplayMode * mode,
SDL_DisplayMode * closest)
742
743
744
745
746
747
{
Uint32 target_format;
int target_refresh_rate;
int i;
SDL_DisplayMode *current, *match;
748
749
if (!mode || !closest) {
SDL_SetError("Missing desired mode or closest mode parameter");
750
751
return NULL;
}
752
753
754
755
756
/* Default to the desktop format */
if (mode->format) {
target_format = mode->format;
} else {
757
target_format = display->desktop_mode.format;
758
759
760
761
762
763
}
/* Default to the desktop refresh rate */
if (mode->refresh_rate) {
target_refresh_rate = mode->refresh_rate;
} else {
764
target_refresh_rate = display->desktop_mode.refresh_rate;
765
766
767
}
match = NULL;
768
769
for (i = 0; i < SDL_GetNumDisplayModesForDisplay(display); ++i) {
current = &display->display_modes[i];
770
771
if (current->w && (current->w < mode->w)) {
772
773
774
/* Out of sorted modes large enough here */
break;
}
775
776
777
778
779
780
781
782
783
784
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;
}
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
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;
843
}
844
845
846
847
848
849
850
851
852
SDL_DisplayMode *
SDL_GetClosestDisplayMode(const SDL_DisplayMode * mode,
SDL_DisplayMode * closest)
{
if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
853
return SDL_GetClosestDisplayModeForDisplay(SDL_CurrentDisplay, mode, closest);
854
855
}
856
int
857
SDL_SetDisplayModeForDisplay(SDL_VideoDisplay * display, const SDL_DisplayMode * mode)
858
{
859
860
861
SDL_DisplayMode display_mode;
SDL_DisplayMode current_mode;
862
863
if (mode) {
display_mode = *mode;
864
865
866
867
868
869
870
871
872
873
874
875
876
877
/* 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;
}
878
879
880
881
882
883
884
885
886
/* 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;
887
}
888
889
/* See if there's anything left to do */
890
SDL_GetCurrentDisplayModeForDisplay(display, ¤t_mode);
891
892
893
if (SDL_memcmp(&display_mode, ¤t_mode, sizeof(display_mode)) == 0) {
return 0;
}
894
895
/* Actually change the display mode */
896
897
898
899
if (!_this->SetDisplayMode) {
SDL_SetError("Video driver doesn't support changing display mode");
return -1;
}
900
if (_this->SetDisplayMode(_this, display, &display_mode) < 0) {
901
902
903
904
return -1;
}
display->current_mode = display_mode;
return 0;
905
906
}
907
int
908
SDL_SetWindowDisplayMode(SDL_Window * window, const SDL_DisplayMode * mode)
909
{
910
CHECK_WINDOW_MAGIC(window, -1);
911
912
913
914
915
if (mode) {
window->fullscreen_mode = *mode;
} else {
SDL_zero(window->fullscreen_mode);
916
}
917
return 0;
918
919
}
920
int
921
SDL_GetWindowDisplayMode(SDL_Window * window, SDL_DisplayMode * mode)
922
{
923
924
SDL_DisplayMode fullscreen_mode;
925
CHECK_WINDOW_MAGIC(window, -1);
926
927
928
929
930
931
932
933
934
fullscreen_mode = window->fullscreen_mode;
if (!fullscreen_mode.w) {
fullscreen_mode.w = window->w;
}
if (!fullscreen_mode.h) {
fullscreen_mode.h = window->h;
}
935
if (!SDL_GetClosestDisplayModeForDisplay(window->display,
936
937
938
939
940
941
&fullscreen_mode,
&fullscreen_mode)) {
SDL_SetError("Couldn't find display mode match");
return -1;
}
942
if (mode) {
943
*mode = fullscreen_mode;
944
945
}
return 0;
946
}
947
948
949
950
951
952
953
954
955
Uint32
SDL_GetWindowPixelFormat(SDL_Window * window)
{
SDL_VideoDisplay *display = window->display;
SDL_DisplayMode *displayMode = &display->current_mode;
return displayMode->format;
}
956
957
958
static void
SDL_UpdateFullscreenMode(SDL_Window * window, SDL_bool attempt)
{
959
SDL_VideoDisplay *display = window->display;
960
961
962
963
964
965
966
967
968
969
970
971
972
973
/* 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) {
974
SDL_RestoreWindow(window);
975
} else {
976
SDL_RaiseWindow(window);
977
978
979
}
} else {
/* We just lost some state, try to release all states */
980
SDL_MinimizeWindow(window);
981
982
983
984
985
}
}
if (FULLSCREEN_VISIBLE(window)) {
/* Hide any other fullscreen windows */
986
987
SDL_Window *other;
for (other = display->windows; other; other = other->next) {
988
if (other != window && FULLSCREEN_VISIBLE(other)) {
989
SDL_MinimizeWindow(other);
990
991
992
993
994
995
996
}
}
}
display->updating_fullscreen = SDL_FALSE;
/* See if there are any fullscreen windows */
997
for (window = display->windows; window; window = window->next) {
998
999
if (FULLSCREEN_VISIBLE(window)) {
SDL_DisplayMode fullscreen_mode;
1000
if (SDL_GetWindowDisplayMode(window, &fullscreen_mode) == 0) {