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[client] displayserver: add new earlyInit to the interface

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Some platforms such as Wayland need to set environment vairables before
SDL is initialized, as such this change detects the display server
before SDL has started and calls the new `earlyInit` method providing
the implementation an opportunity to set things up.
This commit is contained in:
Geoffrey McRae 2021-01-16 20:29:54 +11:00
parent ef678bab1d
commit bad25c409c
3 changed files with 51 additions and 43 deletions
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6
client/displayservers/SDL/sdl.c
View File

@ -33,6 +33,11 @@ struct SDLDSState
static struct SDLDSState sdl;
static bool sdlEarlyInit(void)
{
return true;
}
static void sdlInit(SDL_SysWMinfo * info)
{
memset(&sdl, 0, sizeof(sdl));
@ -143,6 +148,7 @@ static void sdlWarpMouse(int x, int y, bool exiting)
struct LG_DisplayServerOps LGDS_SDL =
{
.subsystem = SDL_SYSWM_UNKNOWN,
.earlyInit = sdlEarlyInit,
.init = sdlInit,
.startup = sdlStartup,
.shutdown = sdlShutdown,

5
client/include/interface/displayserver.h
View File

@ -49,7 +49,10 @@ struct LG_DisplayServerOps
{
const SDL_SYSWM_TYPE subsystem;
/* early initialization */
/* called before SDL has been initialized */
bool (*earlyInit)(void);
/* called after SDL has been initialized */
void (*init)(SDL_SysWMinfo * info);
/* called at startup after window creation, renderer and/or SPICE is ready */

83
client/src/main.c
View File

@ -1654,19 +1654,48 @@ static int lg_run(void)
if (g_cursor.sens < -9) g_cursor.sens = -9;
else if (g_cursor.sens > 9) g_cursor.sens = 9;
if (getenv("WAYLAND_DISPLAY"))
// try to early detect the platform
SDL_SYSWM_TYPE subsystem = SDL_SYSWM_UNKNOWN;
if (getenv("WAYLAND_DISPLAY")) subsystem = SDL_SYSWM_WAYLAND;
else if (getenv("DISPLAY" )) subsystem = SDL_SYSWM_X11;
else
DEBUG_WARN("Unknown subsystem, falling back to SDL default");
// search for the best displayserver ops to use
for(int i = 0; i < LG_DISPLAYSERVER_COUNT; ++i)
if (LG_DisplayServers[i]->subsystem == subsystem)
{
g_state.ds = LG_DisplayServers[i];
break;
}
assert(g_state.ds);
// set any null methods to the fallback
#define SET_FALLBACK(x) \
if (!g_state.ds->x) g_state.ds->x = LG_DisplayServers[0]->x;
SET_FALLBACK(earlyInit);
SET_FALLBACK(getProp);
SET_FALLBACK(init);
SET_FALLBACK(startup);
SET_FALLBACK(shutdown);
SET_FALLBACK(free);
SET_FALLBACK(eventFilter);
SET_FALLBACK(grabPointer);
SET_FALLBACK(ungrabKeyboard);
SET_FALLBACK(warpMouse);
SET_FALLBACK(cbInit);
SET_FALLBACK(cbNotice);
SET_FALLBACK(cbRelease);
SET_FALLBACK(cbRequest);
#undef SET_FALLBACK
// init the subsystem
if (!g_state.ds->earlyInit())
{
DEBUG_INFO("Wayland detected");
if (getenv("SDL_VIDEODRIVER") == NULL)
{
int err = setenv("SDL_VIDEODRIVER", "wayland", 1);
if (err < 0)
{
DEBUG_ERROR("Unable to set the env variable SDL_VIDEODRIVER: %d", err);
return -1;
}
DEBUG_INFO("SDL_VIDEODRIVER has been set to wayland");
}
DEBUG_ERROR("Subsystem early init failed");
return -1;
}
if (!params.noScreensaver)
@ -1793,36 +1822,6 @@ static int lg_run(void)
return -1;
}
// search for the best displayserver ops to use
for(int i = 0; i < LG_DISPLAYSERVER_COUNT; ++i)
if (LG_DisplayServers[i]->subsystem == g_state.wminfo.subsystem)
{
g_state.ds = LG_DisplayServers[i];
break;
}
if (!g_state.ds)
g_state.ds = LG_DisplayServers[0];
// set any null methods to the fallback
#define SET_FALLBACK(x) \
if (!g_state.ds->x) g_state.ds->x = LG_DisplayServers[0]->x;
SET_FALLBACK(getProp);
SET_FALLBACK(init);
SET_FALLBACK(startup);
SET_FALLBACK(shutdown);
SET_FALLBACK(free);
SET_FALLBACK(eventFilter);
SET_FALLBACK(grabPointer);
SET_FALLBACK(ungrabKeyboard);
SET_FALLBACK(warpMouse);
SET_FALLBACK(cbInit);
SET_FALLBACK(cbNotice);
SET_FALLBACK(cbRelease);
SET_FALLBACK(cbRequest);
#undef SET_FALLBACK
// init the subsystem
g_state.ds->init(&g_state.wminfo);
SDL_SetHint(SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS,