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SDL_video.c
2388 lines (2118 loc) · 59.2 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;
/* 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 */
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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;
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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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}
713
714
715
int
SDL_GetCurrentDisplayMode(SDL_DisplayMode * mode)
716
{
717
718
719
720
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
721
return SDL_GetCurrentDisplayModeForDisplay(SDL_CurrentDisplay, mode);
722
}
723
724
SDL_DisplayMode *
725
726
727
SDL_GetClosestDisplayModeForDisplay(SDL_VideoDisplay * display,
const SDL_DisplayMode * mode,
SDL_DisplayMode * closest)
728
729
730
731
732
733
{
Uint32 target_format;
int target_refresh_rate;
int i;
SDL_DisplayMode *current, *match;
734
735
if (!mode || !closest) {
SDL_SetError("Missing desired mode or closest mode parameter");
736
737
return NULL;
}
738
739
740
741
742
/* Default to the desktop format */
if (mode->format) {
target_format = mode->format;
} else {
743
target_format = display->desktop_mode.format;
744
745
746
747
748
749
}
/* Default to the desktop refresh rate */
if (mode->refresh_rate) {
target_refresh_rate = mode->refresh_rate;
} else {
750
target_refresh_rate = display->desktop_mode.refresh_rate;
751
752
753
}
match = NULL;
754
755
for (i = 0; i < SDL_GetNumDisplayModesForDisplay(display); ++i) {
current = &display->display_modes[i];
756
757
if (current->w && (current->w < mode->w)) {
758
759
760
/* Out of sorted modes large enough here */
break;
}
761
762
763
764
765
766
767
768
769
770
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;
}
771
772
773
774
775
776
777
778
779
780
781
782
783
784
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
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;
829
}
830
831
832
833
834
835
836
837
838
SDL_DisplayMode *
SDL_GetClosestDisplayMode(const SDL_DisplayMode * mode,
SDL_DisplayMode * closest)
{
if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
839
return SDL_GetClosestDisplayModeForDisplay(SDL_CurrentDisplay, mode, closest);
840
841
}
842
int
843
SDL_SetDisplayModeForDisplay(SDL_VideoDisplay * display, const SDL_DisplayMode * mode)
844
{
845
846
847
SDL_DisplayMode display_mode;
SDL_DisplayMode current_mode;
848
849
if (mode) {
display_mode = *mode;
850
851
852
853
854
855
856
857
858
859
860
861
862
863
/* 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;
}
864
865
866
867
868
869
870
871
872
/* 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;
873
}
874
875
/* See if there's anything left to do */
876
SDL_GetCurrentDisplayModeForDisplay(display, ¤t_mode);
877
878
879
if (SDL_memcmp(&display_mode, ¤t_mode, sizeof(display_mode)) == 0) {
return 0;
}
880
881
/* Actually change the display mode */
882
883
884
885
if (!_this->SetDisplayMode) {
SDL_SetError("Video driver doesn't support changing display mode");
return -1;
}
886
if (_this->SetDisplayMode(_this, display, &display_mode) < 0) {
887
888
889
890
return -1;
}
display->current_mode = display_mode;
return 0;
891
892
}
893
int
894
SDL_SetWindowDisplayMode(SDL_Window * window, const SDL_DisplayMode * mode)
895
{
896
CHECK_WINDOW_MAGIC(window, -1);
897
898
899
900
901
if (mode) {
window->fullscreen_mode = *mode;
} else {
SDL_zero(window->fullscreen_mode);
902
}
903
return 0;
904
905
}
906
int
907
SDL_GetWindowDisplayMode(SDL_Window * window, SDL_DisplayMode * mode)
908
{
909
910
SDL_DisplayMode fullscreen_mode;
911
CHECK_WINDOW_MAGIC(window, -1);
912
913
914
915
916
917
918
919
920
fullscreen_mode = window->fullscreen_mode;
if (!fullscreen_mode.w) {
fullscreen_mode.w = window->w;
}
if (!fullscreen_mode.h) {
fullscreen_mode.h = window->h;
}
921
if (!SDL_GetClosestDisplayModeForDisplay(window->display,
922
923
924
925
926
927
&fullscreen_mode,
&fullscreen_mode)) {
SDL_SetError("Couldn't find display mode match");
return -1;
}
928
if (mode) {
929
*mode = fullscreen_mode;
930
931
}
return 0;
932
}
933
934
935
936
937
938
939
940
941
Uint32
SDL_GetWindowPixelFormat(SDL_Window * window)
{
SDL_VideoDisplay *display = window->display;
SDL_DisplayMode *displayMode = &display->current_mode;
return displayMode->format;
}
942
943
944
static void
SDL_UpdateFullscreenMode(SDL_Window * window, SDL_bool attempt)
{
945
SDL_VideoDisplay *display = window->display;
946
947
948
949
950
951
952
953
954
955
956
957
958
959
/* 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) {
960
SDL_RestoreWindow(window);
961
} else {
962
SDL_RaiseWindow(window);
963
964
965
}
} else {
/* We just lost some state, try to release all states */
966
SDL_MinimizeWindow(window);
967
968
969
970
971
}
}
if (FULLSCREEN_VISIBLE(window)) {
/* Hide any other fullscreen windows */
972
973
SDL_Window *other;
for (other = display->windows; other; other = other->next) {
974
if (other != window && FULLSCREEN_VISIBLE(other)) {
975
SDL_MinimizeWindow(other);
976
977
978
979
980
981
982
}
}
}
display->updating_fullscreen = SDL_FALSE;
/* See if there are any fullscreen windows */
983
for (window = display->windows; window; window = window->next) {
984
985
if (FULLSCREEN_VISIBLE(window)) {
SDL_DisplayMode fullscreen_mode;
986
if (SDL_GetWindowDisplayMode(window, &fullscreen_mode) == 0) {
987
SDL_SetDisplayModeForDisplay(display, &fullscreen_mode);
988
display->fullscreen_window = window;
989
990
991
992
993
994
995
return;
}
}
}
/* Nope, restore the desktop mode */
SDL_SetDisplayModeForDisplay(display, NULL);
996
display->fullscreen_window = NULL;
997
998
}
999
SDL_Window *
1000
SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)