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6589 lines (5582 loc) · 195 KB
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"
// The high-level video driver subsystem
#include "SDL_sysvideo.h"
#include "SDL_clipboard_c.h"
#include "SDL_egl_c.h"
#include "SDL_surface_c.h"
#include "SDL_pixels_c.h"
#include "SDL_rect_c.h"
#include "SDL_video_c.h"
#include "../events/SDL_events_c.h"
#include "../SDL_hints_c.h"
#include "../SDL_properties_c.h"
#include "../timer/SDL_timer_c.h"
#include "../camera/SDL_camera_c.h"
#include "../render/SDL_sysrender.h"
#include "../main/SDL_main_callbacks.h"
#ifdef SDL_VIDEO_OPENGL
#include <SDL3/SDL_opengl.h>
#endif // SDL_VIDEO_OPENGL
#if defined(SDL_VIDEO_OPENGL_ES) && !defined(SDL_VIDEO_OPENGL)
#include <SDL3/SDL_opengles.h>
#endif // SDL_VIDEO_OPENGL_ES && !SDL_VIDEO_OPENGL
// GL and GLES2 headers conflict on Linux 32 bits
#if defined(SDL_VIDEO_OPENGL_ES2) && !defined(SDL_VIDEO_OPENGL)
#include <SDL3/SDL_opengles2.h>
#endif // SDL_VIDEO_OPENGL_ES2 && !SDL_VIDEO_OPENGL
// GL_CONTEXT_RELEASE_BEHAVIOR and GL_CONTEXT_RELEASE_BEHAVIOR_KHR have the same number.
#ifndef GL_CONTEXT_RELEASE_BEHAVIOR
#define GL_CONTEXT_RELEASE_BEHAVIOR 0x82FB
#endif
// GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH and GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_KHR have the same number.
#ifndef GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH
#define GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH 0x82FC
#endif
// This is always the same number between the various EXT/ARB/GLES extensions.
#ifndef GL_FRAMEBUFFER_SRGB
#define GL_FRAMEBUFFER_SRGB 0x8DB9
#endif
#ifdef SDL_PLATFORM_EMSCRIPTEN
#include <emscripten.h>
#endif
#ifdef SDL_PLATFORM_3DS
#include <3ds.h>
#endif
#ifndef GL_RGBA_FLOAT_MODE_ARB
#define GL_RGBA_FLOAT_MODE_ARB 0x8820
#endif /* GL_RGBA_FLOAT_MODE_ARB */
// Available video drivers
static VideoBootStrap *bootstrap[] = {
#ifdef SDL_VIDEO_DRIVER_PRIVATE
&PRIVATE_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_COCOA
&COCOA_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_X11
#ifdef SDL_VIDEO_DRIVER_WAYLAND
&Wayland_preferred_bootstrap,
#endif
&X11_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_WAYLAND
&Wayland_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_VIVANTE
&VIVANTE_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_WINDOWS
&WINDOWS_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_HAIKU
&HAIKU_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_UIKIT
&UIKIT_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_ANDROID
&Android_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_PS2
&PS2_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_PSP
&PSP_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_VITA
&VITA_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_N3DS
&N3DS_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_NGAGE
&NGAGE_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_KMSDRM
&KMSDRM_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_RISCOS
&RISCOS_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_RPI
&RPI_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_EMSCRIPTEN
&Emscripten_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_QNX
&QNX_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_OFFSCREEN
&OFFSCREEN_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_DUMMY
&DUMMY_bootstrap,
#ifdef SDL_INPUT_LINUXEV
&DUMMY_evdev_bootstrap,
#endif
#endif
#ifdef SDL_VIDEO_DRIVER_DOSVESA
&DOSVESA_bootstrap,
#endif
#ifdef SDL_VIDEO_DRIVER_OPENVR
&OPENVR_bootstrap,
#endif
NULL
};
#define CHECK_WINDOW_MAGIC(window, result) \
CHECK_PARAM(!_this) { \
SDL_UninitializedVideo(); \
return result; \
} \
CHECK_PARAM(!SDL_ObjectValid(window, SDL_OBJECT_TYPE_WINDOW)) { \
SDL_SetError("Invalid window"); \
return result; \
}
#define CHECK_DISPLAY_MAGIC(display, result) \
CHECK_PARAM(!display) { \
return result; \
} \
#define CHECK_WINDOW_NOT_POPUP(window, result) \
CHECK_PARAM(SDL_WINDOW_IS_POPUP(window)) { \
SDL_SetError("Operation invalid on popup windows"); \
return result; \
}
#if defined(SDL_PLATFORM_MACOS) && defined(SDL_VIDEO_DRIVER_COCOA)
// Support for macOS fullscreen spaces, etc.
extern bool Cocoa_IsWindowInFullscreenSpace(SDL_Window *window);
extern bool Cocoa_IsWindowInFullscreenSpaceTransition(SDL_Window *window);
extern bool Cocoa_SetWindowFullscreenSpace(SDL_Window *window, bool state, bool blocking);
extern bool Cocoa_IsShowingModalDialog(SDL_Window *window);
#endif
#ifdef SDL_VIDEO_DRIVER_UIKIT
extern void SDL_UpdateLifecycleObserver(void);
#endif
static void SDL_CheckWindowDisplayChanged(SDL_Window *window);
static void SDL_CheckWindowDisplayScaleChanged(SDL_Window *window);
static void SDL_CheckWindowSafeAreaChanged(SDL_Window *window);
// Convenience functions for reading driver flags
static bool SDL_ModeSwitchingEmulated(SDL_VideoDevice *_this)
{
if (_this->device_caps & VIDEO_DEVICE_CAPS_MODE_SWITCHING_EMULATED) {
return true;
}
return false;
}
static bool SDL_SendsFullscreenDimensions(SDL_VideoDevice *_this)
{
return !!(_this->device_caps & VIDEO_DEVICE_CAPS_SENDS_FULLSCREEN_DIMENSIONS);
}
static bool IsFullscreenOnly(SDL_VideoDevice *_this)
{
return !!(_this->device_caps & VIDEO_DEVICE_CAPS_FULLSCREEN_ONLY);
}
static bool SDL_SendsDisplayChanges(SDL_VideoDevice *_this)
{
return !!(_this->device_caps & VIDEO_DEVICE_CAPS_SENDS_DISPLAY_CHANGES);
}
static bool SDL_DriverSendsHDRChanges(SDL_VideoDevice *_this)
{
return !!(_this->device_caps & VIDEO_DEVICE_CAPS_SENDS_HDR_CHANGES);
}
static bool SDL_DriverHasSlowFramebuffer(SDL_VideoDevice *_this)
{
return !!(_this->device_caps & VIDEO_DEVICE_CAPS_SLOW_FRAMEBUFFER);
}
// Hint to treat all window ops as synchronous
static bool syncHint;
static void SDL_SyncHintWatcher(void *userdata, const char *name, const char *oldValue, const char *newValue)
{
syncHint = SDL_GetStringBoolean(newValue, false);
}
static void SDL_SyncIfRequired(SDL_Window *window)
{
if (syncHint) {
SDL_SyncWindow(window);
}
}
static void SDL_UpdateWindowHierarchy(SDL_Window *window, SDL_Window *parent)
{
// Unlink the window from the existing parent.
if (window->parent) {
if (window->next_sibling) {
window->next_sibling->prev_sibling = window->prev_sibling;
}
if (window->prev_sibling) {
window->prev_sibling->next_sibling = window->next_sibling;
} else {
window->parent->first_child = window->next_sibling;
}
window->parent = NULL;
}
if (parent) {
window->parent = parent;
window->next_sibling = parent->first_child;
if (parent->first_child) {
parent->first_child->prev_sibling = window;
}
parent->first_child = window;
}
}
// Support for framebuffer emulation using an accelerated renderer
#define SDL_PROP_WINDOW_TEXTUREDATA_POINTER "SDL.internal.window.texturedata"
typedef struct
{
SDL_Renderer *renderer;
SDL_Texture *texture;
void *pixels;
int pitch;
int bytes_per_pixel;
} SDL_WindowTextureData;
static Uint32 SDL_DefaultGraphicsBackends(SDL_VideoDevice *_this)
{
#if (defined(SDL_VIDEO_OPENGL) && defined(SDL_PLATFORM_MACOS)) || (defined(SDL_PLATFORM_IOS) && !TARGET_OS_MACCATALYST) || defined(SDL_PLATFORM_QNXNTO)
if (_this->GL_CreateContext) {
return SDL_WINDOW_OPENGL;
}
#endif
#if defined(SDL_VIDEO_METAL) && (TARGET_OS_MACCATALYST || defined(SDL_PLATFORM_MACOS) || defined(SDL_PLATFORM_IOS))
if (_this->Metal_CreateView) {
return SDL_WINDOW_METAL;
}
#endif
#if defined(SDL_VIDEO_OPENGL) && defined(SDL_VIDEO_DRIVER_OPENVR)
if (SDL_strcmp(_this->name, "openvr") == 0) {
return SDL_WINDOW_OPENGL;
}
#endif
return 0;
}
static bool SDL_CreateWindowTexture(SDL_VideoDevice *_this, SDL_Window *window, SDL_PixelFormat *format, void **pixels, int *pitch)
{
SDL_PropertiesID props = SDL_GetWindowProperties(window);
SDL_WindowTextureData *data = (SDL_WindowTextureData *)SDL_GetPointerProperty(props, SDL_PROP_WINDOW_TEXTUREDATA_POINTER, NULL);
const bool transparent = (window->flags & SDL_WINDOW_TRANSPARENT) ? true : false;
int i;
int w, h;
const SDL_PixelFormat *texture_formats;
SDL_GetWindowSizeInPixels(window, &w, &h);
if (!data) {
SDL_Renderer *renderer = NULL;
const char *render_driver = NULL;
// See if there's a render driver being requested
const char *hint = SDL_GetHint(SDL_HINT_FRAMEBUFFER_ACCELERATION);
if (hint && *hint != '0' && *hint != '1' &&
SDL_strcasecmp(hint, "true") != 0 &&
SDL_strcasecmp(hint, "false") != 0 &&
SDL_strcasecmp(hint, SDL_SOFTWARE_RENDERER) != 0) {
render_driver = hint;
}
if (!render_driver) {
render_driver = SDL_GetHint(SDL_HINT_RENDER_DRIVER);
}
if (render_driver && SDL_strcasecmp(render_driver, SDL_SOFTWARE_RENDERER) == 0) {
render_driver = NULL;
}
char *render_driver_copy = NULL;
if (render_driver && *render_driver) {
render_driver_copy = SDL_strdup(render_driver);
render_driver = render_driver_copy;
if (render_driver_copy) { // turn any "software" requests into "xxxxxxxx" so we don't end up in infinite recursion.
char *prev = render_driver_copy;
char *ptr = prev;
while ((ptr = SDL_strchr(ptr, ',')) != NULL) {
*ptr = '\0';
const bool is_sw = (SDL_strcasecmp(prev, SDL_SOFTWARE_RENDERER) == 0);
*ptr = ',';
if (is_sw) {
SDL_memset(prev, 'x', SDL_strlen(SDL_SOFTWARE_RENDERER));
ptr = prev;
} else {
ptr++;
prev = ptr;
}
}
if (SDL_strcasecmp(prev, SDL_SOFTWARE_RENDERER) == 0) {
SDL_memset(prev, 'x', SDL_strlen(SDL_SOFTWARE_RENDERER));
}
}
}
// Check to see if there's a specific driver requested
if (render_driver) {
renderer = SDL_CreateRenderer(window, render_driver);
SDL_free(render_driver_copy);
if (!renderer) {
// The error for this specific renderer has already been set
return false;
}
} else {
SDL_assert(render_driver_copy == NULL);
const int total = SDL_GetNumRenderDrivers();
for (i = 0; i < total; ++i) {
const char *name = SDL_GetRenderDriver(i);
if (name && SDL_strcmp(name, SDL_SOFTWARE_RENDERER) != 0) {
renderer = SDL_CreateRenderer(window, name);
if (renderer) {
break; // this will work.
}
}
}
if (!renderer) {
return SDL_SetError("No hardware accelerated renderers available");
}
}
SDL_assert(renderer != NULL); // should have explicitly checked this above.
// Create the data after we successfully create the renderer (bug #1116)
data = (SDL_WindowTextureData *)SDL_calloc(1, sizeof(*data));
if (!data) {
SDL_DestroyRenderer(renderer);
return false;
}
if (!SDL_SetPointerProperty(props, SDL_PROP_WINDOW_TEXTUREDATA_POINTER, data)) {
SDL_DestroyRenderer(renderer);
return false;
}
data->renderer = renderer;
}
texture_formats = (const SDL_PixelFormat *)SDL_GetPointerProperty(SDL_GetRendererProperties(data->renderer), SDL_PROP_RENDERER_TEXTURE_FORMATS_POINTER, NULL);
if (!texture_formats) {
return false;
}
// Free any old texture and pixel data
if (data->texture) {
SDL_DestroyTexture(data->texture);
data->texture = NULL;
}
SDL_free(data->pixels);
data->pixels = NULL;
// Find the first format with or without an alpha channel
*format = texture_formats[0];
for (i = 0; texture_formats[i] != SDL_PIXELFORMAT_UNKNOWN; ++i) {
SDL_PixelFormat texture_format = texture_formats[i];
if (!SDL_ISPIXELFORMAT_FOURCC(texture_format) &&
!SDL_ISPIXELFORMAT_10BIT(texture_format) &&
!SDL_ISPIXELFORMAT_FLOAT(texture_format) &&
!SDL_ISPIXELFORMAT_INDEXED(texture_format) &&
(!transparent || SDL_ISPIXELFORMAT_ALPHA(texture_format))) {
*format = texture_format;
break;
}
}
data->texture = SDL_CreateTexture(data->renderer, *format,
SDL_TEXTUREACCESS_STREAMING,
w, h);
if (!data->texture) {
// codechecker_false_positive [Malloc] Static analyzer doesn't realize allocated `data` is saved to SDL_PROP_WINDOW_TEXTUREDATA_POINTER and not leaked here.
return false; // NOLINT(clang-analyzer-unix.Malloc)
}
SDL_SetTextureBlendMode(data->texture, SDL_BLENDMODE_NONE);
// Create framebuffer data
data->bytes_per_pixel = SDL_BYTESPERPIXEL(*format);
data->pitch = (((w * data->bytes_per_pixel) + 3) & ~3);
{
// Make static analysis happy about potential SDL_malloc(0) calls.
const size_t allocsize = (size_t)h * data->pitch;
data->pixels = SDL_malloc((allocsize > 0) ? allocsize : 1);
if (!data->pixels) {
return false;
}
}
*pixels = data->pixels;
*pitch = data->pitch;
// Make sure we're not double-scaling the viewport
SDL_SetRenderViewport(data->renderer, NULL);
return true;
}
bool SDL_SetWindowTextureVSync(SDL_VideoDevice *_this, SDL_Window *window, int vsync)
{
SDL_WindowTextureData *data;
data = (SDL_WindowTextureData *)SDL_GetPointerProperty(SDL_GetWindowProperties(window), SDL_PROP_WINDOW_TEXTUREDATA_POINTER, NULL);
if (!data) {
return false;
}
if (!data->renderer) {
return false;
}
return SDL_SetRenderVSync(data->renderer, vsync);
}
static bool SDL_GetWindowTextureVSync(SDL_VideoDevice *_this, SDL_Window *window, int *vsync)
{
SDL_WindowTextureData *data;
data = (SDL_WindowTextureData *)SDL_GetPointerProperty(SDL_GetWindowProperties(window), SDL_PROP_WINDOW_TEXTUREDATA_POINTER, NULL);
if (!data) {
return false;
}
if (!data->renderer) {
return false;
}
return SDL_GetRenderVSync(data->renderer, vsync);
}
static bool SDL_UpdateWindowTexture(SDL_VideoDevice *_this, SDL_Window *window, const SDL_Rect *rects, int numrects)
{
SDL_WindowTextureData *data;
SDL_Rect rect;
void *src;
int w, h;
SDL_GetWindowSizeInPixels(window, &w, &h);
data = (SDL_WindowTextureData *)SDL_GetPointerProperty(SDL_GetWindowProperties(window), SDL_PROP_WINDOW_TEXTUREDATA_POINTER, NULL);
if (!data || !data->texture) {
return SDL_SetError("No window texture data");
}
// Update a single rect that contains subrects for best DMA performance
if (SDL_GetSpanEnclosingRect(w, h, numrects, rects, &rect)) {
src = (void *)((Uint8 *)data->pixels +
rect.y * data->pitch +
rect.x * data->bytes_per_pixel);
if (!SDL_UpdateTexture(data->texture, &rect, src, data->pitch)) {
return false;
}
if (!SDL_RenderTexture(data->renderer, data->texture, NULL, NULL)) {
return false;
}
SDL_RenderPresent(data->renderer);
}
return true;
}
static void SDL_DestroyWindowTexture(SDL_VideoDevice *_this, SDL_Window *window)
{
SDL_PropertiesID props = SDL_GetWindowProperties(window);
if (SDL_HasProperty(props, SDL_PROP_WINDOW_TEXTUREDATA_POINTER)) {
SDL_WindowTextureData *data = SDL_GetPointerProperty(props, SDL_PROP_WINDOW_TEXTUREDATA_POINTER, NULL);
if (data->texture) {
SDL_DestroyTexture(data->texture);
}
if (data->renderer) {
SDL_DestroyRenderer(data->renderer);
}
SDL_free(data->pixels);
SDL_free(data);
SDL_ClearProperty(props, SDL_PROP_WINDOW_TEXTUREDATA_POINTER);
}
}
static SDL_VideoDevice *_this = NULL;
static SDL_AtomicInt SDL_messagebox_count;
static int SDLCALL cmpmodes(const void *A, const void *B)
{
const SDL_DisplayMode *a = (const SDL_DisplayMode *)A;
const SDL_DisplayMode *b = (const SDL_DisplayMode *)B;
int a_refresh_rate = (int)(a->refresh_rate * 100);
int b_refresh_rate = (int)(b->refresh_rate * 100);
int a_pixel_density = (int)(a->pixel_density * 100);
int b_pixel_density = (int)(b->pixel_density * 100);
if (a->w != b->w) {
return b->w - a->w;
} else if (a->h != b->h) {
return b->h - a->h;
} else if (SDL_BITSPERPIXEL(a->format) != SDL_BITSPERPIXEL(b->format)) {
return SDL_BITSPERPIXEL(b->format) - SDL_BITSPERPIXEL(a->format);
} else if (SDL_PIXELLAYOUT(a->format) != SDL_PIXELLAYOUT(b->format)) {
return SDL_PIXELLAYOUT(b->format) - SDL_PIXELLAYOUT(a->format);
} else if (a_refresh_rate != b_refresh_rate) {
return b_refresh_rate - a_refresh_rate;
} else if (a_pixel_density != b_pixel_density) {
return a_pixel_density - b_pixel_density;
}
return 0;
}
bool SDL_UninitializedVideo(void)
{
return SDL_SetError("Video subsystem has not been initialized");
}
// Deduplicated list of video bootstrap drivers.
static const VideoBootStrap *deduped_bootstrap[SDL_arraysize(bootstrap) - 1];
int SDL_GetNumVideoDrivers(void)
{
static int num_drivers = -1;
if (num_drivers >= 0) {
return num_drivers;
}
num_drivers = 0;
// Build a list of unique video drivers.
for (int i = 0; bootstrap[i] != NULL; ++i) {
bool duplicate = false;
for (int j = 0; j < i; ++j) {
if (SDL_strcmp(bootstrap[i]->name, bootstrap[j]->name) == 0) {
duplicate = true;
break;
}
}
if (!duplicate) {
deduped_bootstrap[num_drivers++] = bootstrap[i];
}
}
return num_drivers;
}
const char *SDL_GetVideoDriver(int index)
{
CHECK_PARAM(index < 0 || index >= SDL_GetNumVideoDrivers()) {
SDL_InvalidParamError("index");
return NULL;
}
return deduped_bootstrap[index]->name;
}
/*
* Initialize the video and event subsystems -- determine native pixel format
*/
bool SDL_InitVideo(const char *driver_name)
{
SDL_VideoDevice *video;
bool init_events = false;
bool init_keyboard = false;
bool init_mouse = false;
bool init_touch = false;
bool init_pen = false;
int i = 0;
// Check to make sure we don't overwrite '_this'
if (_this) {
SDL_QuitVideo();
}
SDL_InitTicks();
// Start the event loop
if (!SDL_InitSubSystem(SDL_INIT_EVENTS)) {
goto pre_driver_error;
}
init_events = true;
if (!SDL_InitKeyboard()) {
goto pre_driver_error;
}
init_keyboard = true;
if (!SDL_PreInitMouse()) {
goto pre_driver_error;
}
init_mouse = true;
if (!SDL_InitTouch()) {
goto pre_driver_error;
}
init_touch = true;
if (!SDL_InitPen()) {
goto pre_driver_error;
}
init_pen = true;
// Select the proper video driver
video = NULL;
#ifdef SDL_PLATFORM_LINUX
// https://github.com/libsdl-org/SDL/issues/12247
if (SDL_IsUbuntuTouch()) {
driver_name = "wayland";
}
#endif
if (!driver_name) {
driver_name = SDL_GetHint(SDL_HINT_VIDEO_DRIVER);
}
if (driver_name && *driver_name != 0) {
const char *driver_attempt = driver_name;
while (driver_attempt && *driver_attempt != 0 && !video) {
const char *driver_attempt_end = SDL_strchr(driver_attempt, ',');
size_t driver_attempt_len = (driver_attempt_end) ? (driver_attempt_end - driver_attempt)
: SDL_strlen(driver_attempt);
for (i = 0; bootstrap[i]; ++i) {
if (!bootstrap[i]->is_preferred &&
(driver_attempt_len == SDL_strlen(bootstrap[i]->name)) &&
(SDL_strncasecmp(bootstrap[i]->name, driver_attempt, driver_attempt_len) == 0)) {
video = bootstrap[i]->create();
if (video) {
break;
}
}
}
driver_attempt = (driver_attempt_end) ? (driver_attempt_end + 1) : NULL;
}
} else {
for (i = 0; bootstrap[i]; ++i) {
video = bootstrap[i]->create();
if (video) {
break;
}
}
}
if (video) {
SDL_DebugLogBackend("video", bootstrap[i]->name);
} else {
if (driver_name) {
SDL_SetError("%s not available", driver_name);
goto pre_driver_error;
}
SDL_SetError("No available video device");
goto pre_driver_error;
}
/* From this point on, use SDL_QuitVideo to cleanup on error, rather than
pre_driver_error. */
_this = video;
_this->name = bootstrap[i]->name;
_this->thread = SDL_GetCurrentThreadID();
// Set some very sane GL defaults
_this->gl_config.driver_loaded = 0;
_this->gl_config.dll_handle = NULL;
SDL_GL_ResetAttributes();
// Initialize the video subsystem
if (!_this->VideoInit(_this)) {
SDL_QuitVideo();
return false;
}
// Make sure some displays were added
if (_this->num_displays == 0) {
SDL_QuitVideo();
return SDL_SetError("The video driver did not add any displays");
}
SDL_AddHintCallback(SDL_HINT_VIDEO_SYNC_WINDOW_OPERATIONS, SDL_SyncHintWatcher, NULL);
/* Disable the screen saver by default. This is a change from <= 2.0.1,
but most things using SDL are games or media players; you wouldn't
want a screensaver to trigger if you're playing exclusively with a
joystick, or passively watching a movie. Things that use SDL but
function more like a normal desktop app should explicitly re-enable the
screensaver. */
if (!SDL_GetHintBoolean(SDL_HINT_VIDEO_ALLOW_SCREENSAVER, false)) {
SDL_DisableScreenSaver();
}
SDL_PostInitMouse();
// We're ready to go!
return true;
pre_driver_error:
SDL_assert(_this == NULL);
if (init_pen) {
SDL_QuitPen();
}
if (init_touch) {
SDL_QuitTouch();
}
if (init_mouse) {
SDL_QuitMouse();
}
if (init_keyboard) {
SDL_QuitKeyboard();
}
if (init_events) {
SDL_QuitSubSystem(SDL_INIT_EVENTS);
}
return false;
}
const char *SDL_GetCurrentVideoDriver(void)
{
if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
return _this->name;
}
SDL_VideoDevice *SDL_GetVideoDevice(void)
{
return _this;
}
bool SDL_OnVideoThread(void)
{
return (_this && SDL_GetCurrentThreadID() == _this->thread);
}
void SDL_SetSystemTheme(SDL_SystemTheme theme)
{
if (_this && theme != _this->system_theme) {
_this->system_theme = theme;
SDL_SendSystemThemeChangedEvent();
}
}
SDL_SystemTheme SDL_GetSystemTheme(void)
{
if (_this) {
return _this->system_theme;
} else {
return SDL_SYSTEM_THEME_UNKNOWN;
}
}
void SDL_UpdateDesktopBounds(void)
{
SDL_Rect rect;
SDL_zero(rect);
SDL_DisplayID *displays = SDL_GetDisplays(NULL);
if (displays) {
for (int i = 0; displays[i]; ++i) {
SDL_Rect bounds;
if (SDL_GetDisplayBounds(displays[i], &bounds)) {
if (i == 0) {
SDL_copyp(&rect, &bounds);
} else {
SDL_GetRectUnion(&rect, &bounds, &rect);
}
}
}
SDL_free(displays);
}
SDL_copyp(&_this->desktop_bounds, &rect);
}
static void SDL_FinalizeDisplayMode(SDL_DisplayMode *mode)
{
// Make sure all the fields are set up correctly
if (mode->pixel_density <= 0.0f) {
mode->pixel_density = 1.0f;
}
if (mode->refresh_rate_numerator > 0) {
if (mode->refresh_rate_denominator <= 0) {
mode->refresh_rate_denominator = 1;
}
mode->refresh_rate = (float)mode->refresh_rate_numerator / mode->refresh_rate_denominator;
} else {
SDL_CalculateFraction(mode->refresh_rate, &mode->refresh_rate_numerator, &mode->refresh_rate_denominator);
}
mode->refresh_rate = SDL_roundf(mode->refresh_rate * 100) / 100.0f;
}
SDL_DisplayID SDL_AddBasicVideoDisplay(const SDL_DisplayMode *desktop_mode)
{
SDL_VideoDisplay display;
SDL_zero(display);
if (desktop_mode) {
SDL_memcpy(&display.desktop_mode, desktop_mode, sizeof(display.desktop_mode));
}
return SDL_AddVideoDisplay(&display, false);
}
SDL_DisplayID SDL_AddVideoDisplay(const SDL_VideoDisplay *display, bool send_event)
{
SDL_VideoDisplay **displays, *new_display;
SDL_DisplayID id;
SDL_PropertiesID props;
int i;
new_display = (SDL_VideoDisplay *)SDL_malloc(sizeof(*new_display));
if (!new_display) {
return 0;
}
displays = (SDL_VideoDisplay **)SDL_realloc(_this->displays, (_this->num_displays + 1) * sizeof(*displays));
if (!displays) {
SDL_free(new_display);
return 0;
}
_this->displays = displays;
_this->displays[_this->num_displays++] = new_display;
id = SDL_GetNextObjectID();
SDL_copyp(new_display, display);
new_display->id = id;
new_display->device = _this;
if (display->name) {
new_display->name = SDL_strdup(display->name);
} else {
char name[32];
SDL_itoa(id, name, 10);
new_display->name = SDL_strdup(name);
}
if (new_display->content_scale == 0.0f) {
new_display->content_scale = 1.0f;
}
new_display->desktop_mode.displayID = id;
new_display->current_mode = &new_display->desktop_mode;
SDL_FinalizeDisplayMode(&new_display->desktop_mode);
for (i = 0; i < new_display->num_fullscreen_modes; ++i) {
new_display->fullscreen_modes[i].displayID = id;
}
new_display->HDR.HDR_headroom = SDL_max(display->HDR.HDR_headroom, 1.0f);
new_display->HDR.SDR_white_level = SDL_max(display->HDR.SDR_white_level, 1.0f);
props = SDL_GetDisplayProperties(id);
SDL_SetBooleanProperty(props, SDL_PROP_DISPLAY_HDR_ENABLED_BOOLEAN, new_display->HDR.HDR_headroom > 1.0f);
SDL_UpdateDesktopBounds();
if (send_event) {
SDL_SendDisplayEvent(new_display, SDL_EVENT_DISPLAY_ADDED, 0, 0);
}
return id;
}
void SDL_OnDisplayAdded(SDL_VideoDisplay *display)
{
SDL_Window *window;
// See if any windows have changed to the new display
for (window = _this->windows; window; window = window->next) {
SDL_CheckWindowDisplayChanged(window);
}
}
void SDL_OnDisplayMoved(SDL_VideoDisplay *display)
{
SDL_UpdateDesktopBounds();
}
void SDL_DelVideoDisplay(SDL_DisplayID displayID, bool send_event)
{
SDL_VideoDisplay *display;
int display_index = SDL_GetDisplayIndex(displayID);
if (display_index < 0) {
return;
}
display = _this->displays[display_index];
if (send_event) {
SDL_SendDisplayEvent(display, SDL_EVENT_DISPLAY_REMOVED, 0, 0);
}
SDL_DestroyProperties(display->props);
SDL_free(display->name);
SDL_ResetFullscreenDisplayModes(display);
SDL_free(display->desktop_mode.internal);
display->desktop_mode.internal = NULL;
SDL_free(display->internal);
display->internal = NULL;
SDL_free(display);
if (display_index < (_this->num_displays - 1)) {
SDL_memmove(&_this->displays[display_index], &_this->displays[display_index + 1], (_this->num_displays - display_index - 1) * sizeof(_this->displays[display_index]));
}
--_this->num_displays;
SDL_UpdateDesktopBounds();
}
SDL_DisplayID *SDL_GetDisplays(int *count)
{
int i;
SDL_DisplayID *displays;
if (!_this) {
if (count) {
*count = 0;
}
SDL_UninitializedVideo();
return NULL;
}
displays = (SDL_DisplayID *)SDL_malloc((_this->num_displays + 1) * sizeof(*displays));
if (displays) {
if (count) {
*count = _this->num_displays;
}
for (i = 0; i < _this->num_displays; ++i) {
displays[i] = _this->displays[i]->id;
}
displays[i] = 0;
} else {
if (count) {
*count = 0;
}
}
return displays;
}
SDL_VideoDisplay *SDL_GetVideoDisplay(SDL_DisplayID displayID)
{
int display_index;
display_index = SDL_GetDisplayIndex(displayID);
if (display_index < 0) {
return NULL;
}
return _this->displays[display_index];