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bad25c409c
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.
167 lines
3.8 KiB
C
167 lines
3.8 KiB
C
/*
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Looking Glass - KVM FrameRelay (KVMFR) Client
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Copyright (C) 2017-2021 Geoffrey McRae <geoff@hostfission.com>
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https://looking-glass.hostfission.com
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "interface/displayserver.h"
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#include <SDL2/SDL.h>
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#include "app.h"
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#include "common/debug.h"
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struct SDLDSState
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{
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bool keyboardGrabbed;
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bool pointerGrabbed;
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bool exiting;
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};
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static struct SDLDSState sdl;
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static bool sdlEarlyInit(void)
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{
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return true;
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}
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static void sdlInit(SDL_SysWMinfo * info)
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{
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memset(&sdl, 0, sizeof(sdl));
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}
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static void sdlStartup(void)
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{
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}
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static void sdlShutdown(void)
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{
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}
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static void sdlFree(void)
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{
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}
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static bool sdlGetProp(LG_DSProperty prop, void * ret)
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{
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return false;
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}
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static bool sdlEventFilter(SDL_Event * event)
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{
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switch(event->type)
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{
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case SDL_MOUSEMOTION:
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// stop motion events during the warp out of the window
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if (sdl.exiting)
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return true;
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app_updateCursorPos(event->motion.x, event->motion.y);
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if (app_cursorIsGrabbed())
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app_handleMouseGrabbed(event->motion.xrel, event->motion.yrel);
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else
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app_handleMouseNormal(event->motion.xrel, event->motion.yrel);
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break;
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case SDL_WINDOWEVENT:
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{
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switch(event->window.event)
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{
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/* after leave re-enable warp and cursor processing */
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case SDL_WINDOWEVENT_LEAVE:
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sdl.exiting = false;
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return false;
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}
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break;
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}
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}
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return false;
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}
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static void sdlGrabPointer(void)
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{
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SDL_SetWindowGrab(app_getWindow(), SDL_TRUE);
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SDL_SetRelativeMouseMode(SDL_TRUE);
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sdl.pointerGrabbed = true;
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}
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static void sdlUngrabPointer(void)
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{
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SDL_SetWindowGrab(app_getWindow(), SDL_FALSE);
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SDL_SetRelativeMouseMode(SDL_FALSE);
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sdl.pointerGrabbed = false;
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}
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static void sdlGrabKeyboard(void)
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{
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if (sdl.pointerGrabbed)
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SDL_SetWindowGrab(app_getWindow(), SDL_FALSE);
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else
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{
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DEBUG_WARN("SDL does not support grabbing only the keyboard, grabbing all");
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sdl.pointerGrabbed = true;
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}
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SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
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SDL_SetWindowGrab(app_getWindow(), SDL_TRUE);
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sdl.keyboardGrabbed = true;
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}
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static void sdlUngrabKeyboard(void)
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{
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SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "0");
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SDL_SetWindowGrab(app_getWindow(), SDL_FALSE);
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if (sdl.pointerGrabbed)
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SDL_SetWindowGrab(app_getWindow(), SDL_TRUE);
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sdl.keyboardGrabbed = false;
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}
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static void sdlWarpMouse(int x, int y, bool exiting)
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{
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if (sdl.exiting)
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return;
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sdl.exiting = exiting;
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// if exiting turn off relative mode
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if (exiting)
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SDL_SetRelativeMouseMode(SDL_FALSE);
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// issue the warp
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SDL_WarpMouseInWindow(app_getWindow(), x, y);
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}
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struct LG_DisplayServerOps LGDS_SDL =
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{
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.subsystem = SDL_SYSWM_UNKNOWN,
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.earlyInit = sdlEarlyInit,
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.init = sdlInit,
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.startup = sdlStartup,
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.shutdown = sdlShutdown,
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.free = sdlFree,
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.getProp = sdlGetProp,
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.eventFilter = sdlEventFilter,
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.grabPointer = sdlGrabPointer,
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.ungrabPointer = sdlUngrabPointer,
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.grabKeyboard = sdlGrabKeyboard,
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.ungrabKeyboard = sdlUngrabKeyboard,
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.warpMouse = sdlWarpMouse,
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/* SDL does not have clipboard support */
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.cbInit = NULL,
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};
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