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Fixed bug 5451 - Can't create EGLSurface in Wayland from SDLWindow (no EGLNativeWindow pointer) 

sashikknox

In some cases, need create EGLWindow with SDLWindow. In X11 i can get pointer to NativeWindow from **struct SDL_SysWMinfo wmInfo**
```C++
struct SDL_SysWMinfo wmInfo;
SDL_GetWindowWMInfo(ptSDLWindow, &wmInfo)
#if defined(__unix__) && defined(SDL_VIDEO_DRIVER_X11)
nativeWindow=(EGLNativeWindowType)wmInfo.info.x11.window;
nativeDisplay=(EGLNativeDisplayType)wmInfo.info.x11.display;
#endif
```
than i can create EGLSurface
```
eglCreateWindowSurface(nativeDisplay, EGL_CONFIG, nativeWindow, SURFACE_ATTRIBUTES);
```
in Wayland i can do it with same way, just need pointer to **EGLWindow**, we already have pointer to **wl_display** from **SDL_sysWMInfo**, need add to **wl** struct in SDL_SysWMInfo another pointer to **struct wl_egl_window *egl_window;**. And in wayland backend, in function **Wayland_GetWindowWMInfo** return pointer to **egl_window** from **SDL_WindowData**
Now i use patched statically built SDL2 in port of Quake 2 GLES2 for SailfishOS (it use QtWayland):
link to SDL2 commit and changed string for patch:
- 6858a618cd
- b1e29e87b9/SDL2/src/video/wayland/SDL_waylandwindow.c (L463)

link to use in Quake2 port:
1. here i get pointer to EGLNativeWindowType:  6d94fedb1b/Engine/Sources/Compatibility/OpenGLES/EGLWrapper.c (L319)
2. then use it for create EGLSurface: 6d94fedb1b/Engine/Sources/Compatibility/OpenGLES/EGLWrapper.c (L391)
This commit is contained in:
Sam Lantinga 2021-01-14 14:42:53 -08:00
parent b2aaab3d53
commit 6a342954e8
2 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/SDL_syswm.h
View File

@ -277,6 +277,7 @@ struct SDL_SysWMinfo
struct wl_display *display; /**< Wayland display */
struct wl_surface *surface; /**< Wayland surface */
struct wl_shell_surface *shell_surface; /**< Wayland shell_surface (window manager handle) */
struct wl_egl_window *egl_window; /**< Wayland EGL window (native window) */
} wl;
#endif
#if defined(SDL_VIDEO_DRIVER_MIR) /* no longer available, left for API/ABI compatibility. Remove in 2.1! */

11
src/video/wayland/SDL_waylandwindow.c
View File

@ -437,9 +437,9 @@ SDL_bool
Wayland_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
{
SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
const Uint32 version = ((((Uint32) info->version.major) * 1000000) +
(((Uint32) info->version.minor) * 10000) +
(((Uint32) info->version.patch)));
const Uint32 version = SDL_VERSIONNUM((Uint32)info->version.major,
(Uint32)info->version.minor,
(Uint32)info->version.patch);
/* Before 2.0.6, it was possible to build an SDL with Wayland support
(SDL_SysWMinfo will be large enough to hold Wayland info), but build
@ -451,7 +451,7 @@ Wayland_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
just return an error for older apps using this function. Those apps
will need to be recompiled against newer headers or not use Wayland,
maybe by forcing SDL_VIDEODRIVER=x11. */
if (version < 2000006) {
if (version < SDL_VERSIONNUM(2, 0, 6)) {
info->subsystem = SDL_SYSWM_UNKNOWN;
SDL_SetError("Version must be 2.0.6 or newer");
return SDL_FALSE;
@ -460,6 +460,9 @@ Wayland_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
info->info.wl.display = data->waylandData->display;
info->info.wl.surface = data->surface;
info->info.wl.shell_surface = data->shell_surface.wl;
if (version >= SDL_VERSIONNUM(2, 0, 15)) {
info->info.wl.egl_window = data->egl_window;
}
info->subsystem = SDL_SYSWM_WAYLAND;
return SDL_TRUE;