mirror of
https://github.com/gnif/LookingGlass.git
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1ba1108099
This is enabled on default. Specify wayland:warpSupport=no to disable it, which may be useful on certain compositors that do not warp when the pointer is confined.
551 lines
12 KiB
C
551 lines
12 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 <SDL2/SDL_syswm.h>
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#ifdef ENABLE_EGL
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#include <EGL/eglext.h>
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#endif
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#if defined(SDL_VIDEO_DRIVER_WAYLAND)
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#include <wayland-egl.h>
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#endif
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#include "app.h"
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#include "kb.h"
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#include "egl_dynprocs.h"
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#include "common/types.h"
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#include "common/debug.h"
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struct SDLDSState
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{
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SDL_Window * window;
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SDL_Cursor * cursor;
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EGLNativeWindowType wlDisplay;
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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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/* forwards */
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static int sdlEventFilter(void * userdata, SDL_Event * event);
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static void sdlSetup(void)
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{
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}
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static bool sdlProbe(void)
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{
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return true;
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}
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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 bool sdlInit(const LG_DSInitParams params)
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{
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memset(&sdl, 0, sizeof(sdl));
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// Allow screensavers for now: we will enable and disable as needed.
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SDL_SetHint(SDL_HINT_VIDEO_ALLOW_SCREENSAVER, "1");
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if (SDL_Init(SDL_INIT_VIDEO) < 0)
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{
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DEBUG_ERROR("SDL_Init Failed");
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return false;
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}
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#ifdef ENABLE_OPENGL
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if (params.opengl)
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{
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SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER , 1);
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SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
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SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 4);
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SDL_GL_SetAttribute(SDL_GL_RED_SIZE , 8);
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SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE , 8);
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SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE , 8);
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}
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#endif
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sdl.window = SDL_CreateWindow(
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params.title,
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params.center ? SDL_WINDOWPOS_CENTERED : params.x,
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params.center ? SDL_WINDOWPOS_CENTERED : params.y,
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params.w,
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params.h,
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(
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SDL_WINDOW_HIDDEN |
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(params.resizable ? SDL_WINDOW_RESIZABLE : 0) |
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(params.borderless ? SDL_WINDOW_BORDERLESS : 0) |
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(params.maximize ? SDL_WINDOW_MAXIMIZED : 0) |
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(params.opengl ? SDL_WINDOW_OPENGL : 0)
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)
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);
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if (sdl.window == NULL)
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{
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DEBUG_ERROR("Could not create an SDL window: %s\n", SDL_GetError());
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goto fail_init;
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}
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const uint8_t data[4] = {0xf, 0x9, 0x9, 0xf};
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const uint8_t mask[4] = {0xf, 0xf, 0xf, 0xf};
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sdl.cursor = SDL_CreateCursor(data, mask, 8, 4, 4, 0);
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SDL_SetCursor(sdl.cursor);
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SDL_ShowWindow(sdl.window);
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SDL_SetHint(SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS,
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params.minimizeOnFocusLoss ? "1" : "0");
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if (params.fullscreen)
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SDL_SetWindowFullscreen(sdl.window, SDL_WINDOW_FULLSCREEN_DESKTOP);
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if (!params.center)
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SDL_SetWindowPosition(sdl.window, params.x, params.y);
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// ensure mouse acceleration is identical in server mode
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SDL_SetHintWithPriority(SDL_HINT_MOUSE_RELATIVE_MODE_WARP, "1", SDL_HINT_OVERRIDE);
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SDL_SetEventFilter(sdlEventFilter, NULL);
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return true;
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fail_init:
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SDL_Quit();
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return false;
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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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SDL_DestroyWindow(sdl.window);
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if (sdl.cursor)
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SDL_FreeCursor(sdl.cursor);
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if (sdl.window)
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SDL_DestroyWindow(sdl.window);
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SDL_Quit();
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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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#ifdef ENABLE_EGL
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static EGLDisplay sdlGetEGLDisplay(void)
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{
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SDL_SysWMinfo wminfo;
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SDL_VERSION(&wminfo.version);
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if (!SDL_GetWindowWMInfo(sdl.window, &wminfo))
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{
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DEBUG_ERROR("SDL_GetWindowWMInfo failed");
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return EGL_NO_DISPLAY;
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}
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EGLNativeDisplayType native;
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EGLenum platform;
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switch(wminfo.subsystem)
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{
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case SDL_SYSWM_X11:
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native = (EGLNativeDisplayType)wminfo.info.x11.display;
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platform = EGL_PLATFORM_X11_KHR;
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break;
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#if defined(SDL_VIDEO_DRIVER_WAYLAND)
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case SDL_SYSWM_WAYLAND:
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native = (EGLNativeDisplayType)wminfo.info.wl.display;
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platform = EGL_PLATFORM_WAYLAND_KHR;
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break;
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#endif
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default:
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DEBUG_ERROR("Unsupported subsystem");
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return EGL_NO_DISPLAY;
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}
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const char *early_exts = eglQueryString(NULL, EGL_EXTENSIONS);
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if (strstr(early_exts, "EGL_KHR_platform_base") != NULL &&
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g_egl_dynProcs.eglGetPlatformDisplay)
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{
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DEBUG_INFO("Using eglGetPlatformDisplay");
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return g_egl_dynProcs.eglGetPlatformDisplay(platform, native, NULL);
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}
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if (strstr(early_exts, "EGL_EXT_platform_base") != NULL &&
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g_egl_dynProcs.eglGetPlatformDisplayEXT)
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{
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DEBUG_INFO("Using eglGetPlatformDisplayEXT");
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return g_egl_dynProcs.eglGetPlatformDisplayEXT(platform, native, NULL);
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}
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DEBUG_INFO("Using eglGetDisplay");
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return eglGetDisplay(native);
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}
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static EGLNativeWindowType sdlGetEGLNativeWindow(void)
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{
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SDL_SysWMinfo wminfo;
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SDL_VERSION(&wminfo.version);
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if (!SDL_GetWindowWMInfo(sdl.window, &wminfo))
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{
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DEBUG_ERROR("SDL_GetWindowWMInfo failed");
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return 0;
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}
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switch(wminfo.subsystem)
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{
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case SDL_SYSWM_X11:
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return (EGLNativeWindowType)wminfo.info.x11.window;
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#if defined(SDL_VIDEO_DRIVER_WAYLAND)
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case SDL_SYSWM_WAYLAND:
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{
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if (sdl.wlDisplay)
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return sdl.wlDisplay;
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int width, height;
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SDL_GetWindowSize(sdl.window, &width, &height);
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sdl.wlDisplay = (EGLNativeWindowType)wl_egl_window_create(
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wminfo.info.wl.surface, width, height);
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return sdl.wlDisplay;
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}
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#endif
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default:
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DEBUG_ERROR("Unsupported subsystem");
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return 0;
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}
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}
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static void sdlEGLSwapBuffers(EGLDisplay display, EGLSurface surface)
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{
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eglSwapBuffers(display, surface);
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}
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#endif //ENABLE_EGL
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#ifdef ENABLE_OPENGL
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static LG_DSGLContext sdlGLCreateContext(void)
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{
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return (LG_DSGLContext)SDL_GL_CreateContext(sdl.window);
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}
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static void sdlGLDeleteContext(LG_DSGLContext context)
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{
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SDL_GL_DeleteContext((SDL_GLContext)context);
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}
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static void sdlGLMakeCurrent(LG_DSGLContext context)
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{
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SDL_GL_MakeCurrent(sdl.window, (SDL_GLContext)context);
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}
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static void sdlGLSetSwapInterval(int interval)
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{
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SDL_GL_SetSwapInterval(interval);
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}
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static void sdlGLSwapBuffers(void)
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{
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SDL_GL_SwapWindow(sdl.window);
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}
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#endif //ENABLE_OPENGL
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static int sdlEventFilter(void * userdata, SDL_Event * event)
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{
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switch(event->type)
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{
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case SDL_QUIT:
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app_handleCloseEvent();
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break;
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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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break;
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app_updateCursorPos(event->motion.x, event->motion.y);
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app_handleMouseRelative(event->motion.xrel, event->motion.yrel,
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event->motion.xrel, event->motion.yrel);
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break;
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case SDL_MOUSEBUTTONDOWN:
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{
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int button = event->button.button;
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if (button > 3)
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button += 2;
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app_handleButtonPress(button);
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break;
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}
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case SDL_MOUSEBUTTONUP:
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{
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int button = event->button.button;
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if (button > 3)
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button += 2;
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app_handleButtonRelease(button);
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break;
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}
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case SDL_MOUSEWHEEL:
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{
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int button = event->wheel.y > 0 ? 4 : 5;
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app_handleButtonPress(button);
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app_handleButtonRelease(button);
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break;
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}
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case SDL_KEYDOWN:
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{
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SDL_Scancode sc = event->key.keysym.scancode;
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app_handleKeyPress(sdl_to_xfree86[sc]);
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break;
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}
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case SDL_KEYUP:
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{
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SDL_Scancode sc = event->key.keysym.scancode;
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app_handleKeyRelease(sdl_to_xfree86[sc]);
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break;
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}
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case SDL_WINDOWEVENT:
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switch(event->window.event)
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{
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case SDL_WINDOWEVENT_ENTER:
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app_handleEnterEvent(true);
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break;
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case SDL_WINDOWEVENT_LEAVE:
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sdl.exiting = false;
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app_handleEnterEvent(false);
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break;
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case SDL_WINDOWEVENT_FOCUS_GAINED:
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app_handleFocusEvent(true);
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break;
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case SDL_WINDOWEVENT_FOCUS_LOST:
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app_handleFocusEvent(false);
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break;
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case SDL_WINDOWEVENT_SIZE_CHANGED:
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case SDL_WINDOWEVENT_RESIZED:
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{
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struct Border border;
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SDL_GetWindowBordersSize(
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sdl.window,
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&border.top,
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&border.left,
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&border.bottom,
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&border.right
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);
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app_handleResizeEvent(
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event->window.data1,
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event->window.data2,
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border);
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break;
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}
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case SDL_WINDOWEVENT_MOVED:
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app_updateWindowPos(event->window.data1, event->window.data2);
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break;
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case SDL_WINDOWEVENT_CLOSE:
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app_handleCloseEvent();
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break;
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}
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break;
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}
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return 0;
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}
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static void sdlShowPointer(bool show)
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{
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SDL_ShowCursor(show ? SDL_ENABLE : SDL_DISABLE);
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}
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static void sdlGrabPointer(void)
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{
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SDL_SetWindowGrab(sdl.window, 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(sdl.window, 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(sdl.window, 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(sdl.window, 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(sdl.window, SDL_FALSE);
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if (sdl.pointerGrabbed)
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SDL_SetWindowGrab(sdl.window, SDL_TRUE);
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sdl.keyboardGrabbed = false;
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}
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static void sdlWarpPointer(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(sdl.window, x, y);
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}
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static void sdlRealignPointer(void)
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{
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app_handleMouseRelative(0.0, 0.0, 0.0, 0.0);
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}
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static bool sdlIsValidPointerPos(int x, int y)
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{
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const int displays = SDL_GetNumVideoDisplays();
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for(int i = 0; i < displays; ++i)
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{
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SDL_Rect r;
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SDL_GetDisplayBounds(i, &r);
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if ((x >= r.x && x < r.x + r.w) &&
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(y >= r.y && y < r.y + r.h))
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return true;
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}
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return false;
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}
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static void sdlInhibitIdle(void)
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{
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SDL_DisableScreenSaver();
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}
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static void sdlUninhibitIdle(void)
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{
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SDL_EnableScreenSaver();
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}
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static void sdlWait(unsigned int time)
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{
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SDL_WaitEventTimeout(NULL, time);
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}
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static void sdlSetWindowSize(int x, int y)
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{
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SDL_SetWindowSize(sdl.window, x, y);
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}
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static void sdlSetFullscreen(bool fs)
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{
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SDL_SetWindowFullscreen(sdl.window, fs ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
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}
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static bool sdlGetFullscreen(void)
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{
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return (SDL_GetWindowFlags(sdl.window) & SDL_WINDOW_FULLSCREEN_DESKTOP) != 0;
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}
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struct LG_DisplayServerOps LGDS_SDL =
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{
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.setup = sdlSetup,
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.probe = sdlProbe,
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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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#ifdef ENABLE_EGL
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.getEGLDisplay = sdlGetEGLDisplay,
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.getEGLNativeWindow = sdlGetEGLNativeWindow,
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.eglSwapBuffers = sdlEGLSwapBuffers,
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#endif
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#ifdef ENABLE_OPENGL
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.glCreateContext = sdlGLCreateContext,
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.glDeleteContext = sdlGLDeleteContext,
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.glMakeCurrent = sdlGLMakeCurrent,
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.glSetSwapInterval = sdlGLSetSwapInterval,
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.glSwapBuffers = sdlGLSwapBuffers,
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#endif
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.showPointer = sdlShowPointer,
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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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.warpPointer = sdlWarpPointer,
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.realignPointer = sdlRealignPointer,
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.isValidPointerPos = sdlIsValidPointerPos,
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.inhibitIdle = sdlInhibitIdle,
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.uninhibitIdle = sdlUninhibitIdle,
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.wait = sdlWait,
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.setWindowSize = sdlSetWindowSize,
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.setFullscreen = sdlSetFullscreen,
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.getFullscreen = sdlGetFullscreen,
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/* SDL does not have clipboard support */
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.cbInit = NULL,
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};
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