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LookingGlass/client/src/main.c
Geoffrey McRae 0e7e918e2c [client] cleanup and re-order startup/shutdown code
2019-10-26 12:03:10 +11:00

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/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "main.h"
#include "config.h"
#include <getopt.h>
#include <signal.h>
#include <SDL2/SDL_syswm.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <assert.h>
#include "common/debug.h"
#include "common/crash.h"
#include "common/KVMFR.h"
#include "common/stringutils.h"
#include "utils.h"
#include "kb.h"
#include "ll.h"
// forwards
static int cursorThread(void * unused);
static int renderThread(void * unused);
static int frameThread (void * unused);
static SDL_Thread *t_spice = NULL;
static SDL_Thread *t_render = NULL;
static SDL_Cursor *cursor = NULL;
struct AppState state;
// this structure is initialized in config.c
struct AppParams params = { 0 };
static void updatePositionInfo()
{
if (state.haveSrcSize)
{
if (params.keepAspect)
{
const float srcAspect = (float)state.srcSize.y / (float)state.srcSize.x;
const float wndAspect = (float)state.windowH / (float)state.windowW;
if (wndAspect < srcAspect)
{
state.dstRect.w = (float)state.windowH / srcAspect;
state.dstRect.h = state.windowH;
state.dstRect.x = (state.windowW >> 1) - (state.dstRect.w >> 1);
state.dstRect.y = 0;
}
else
{
state.dstRect.w = state.windowW;
state.dstRect.h = (float)state.windowW * srcAspect;
state.dstRect.x = 0;
state.dstRect.y = (state.windowH >> 1) - (state.dstRect.h >> 1);
}
}
else
{
state.dstRect.x = 0;
state.dstRect.y = 0;
state.dstRect.w = state.windowW;
state.dstRect.h = state.windowH;
}
state.dstRect.valid = true;
state.scaleX = (float)state.srcSize.y / (float)state.dstRect.h;
state.scaleY = (float)state.srcSize.x / (float)state.dstRect.w;
}
state.lgrResize = true;
}
static int renderThread(void * unused)
{
if (!state.lgr->render_startup(state.lgrData, state.window))
{
state.running = false;
return 1;
}
// start the cursor thread after render startup to prevent a race condition
SDL_Thread *t_cursor = NULL;
if (!(t_cursor = SDL_CreateThread(cursorThread, "cursorThread", NULL)))
{
DEBUG_ERROR("cursor create thread failed");
return 1;
}
struct timespec time;
clock_gettime(CLOCK_MONOTONIC, &time);
while(state.running)
{
if (state.lgrResize)
{
if (state.lgr)
state.lgr->on_resize(state.lgrData, state.windowW, state.windowH, state.dstRect);
state.lgrResize = false;
}
if (!state.lgr->render(state.lgrData, state.window))
break;
if (params.showFPS)
{
const uint64_t t = nanotime();
state.renderTime += t - state.lastFrameTime;
state.lastFrameTime = t;
++state.renderCount;
if (state.renderTime > 1e9)
{
const float avgUPS = 1000.0f / (((float)state.renderTime / state.frameCount ) / 1e6f);
const float avgFPS = 1000.0f / (((float)state.renderTime / state.renderCount) / 1e6f);
state.lgr->update_fps(state.lgrData, avgUPS, avgFPS);
state.renderTime = 0;
state.frameCount = 0;
state.renderCount = 0;
}
}
uint64_t nsec = time.tv_nsec + state.frameTime;
if (nsec > 1e9)
{
time.tv_nsec = nsec - 1e9;
++time.tv_sec;
}
else
time.tv_nsec = nsec;
clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &time, NULL);
}
state.running = false;
if (t_cursor)
SDL_WaitThread(t_cursor, NULL);
if (state.t_frame)
SDL_WaitThread(state.t_frame, NULL);
state.lgr->deinitialize(state.lgrData);
state.lgr = NULL;
return 0;
}
static int cursorThread(void * unused)
{
KVMFRCursor header;
LG_RendererCursor cursorType = LG_CURSOR_COLOR;
uint32_t version = 0;
memset(&header, 0, sizeof(KVMFRCursor));
while(state.running)
{
// poll until we have cursor data
if(!(state.shm->cursor.flags & KVMFR_CURSOR_FLAG_UPDATE) &&
!(state.shm->cursor.flags & KVMFR_CURSOR_FLAG_POS))
{
if (!state.running)
return 0;
usleep(params.cursorPollInterval);
continue;
}
// if the cursor was moved
bool moved = false;
if (state.shm->cursor.flags & KVMFR_CURSOR_FLAG_POS)
{
state.cursor.x = state.shm->cursor.x;
state.cursor.y = state.shm->cursor.y;
state.haveCursorPos = true;
moved = true;
}
// if this was only a move event
if (!(state.shm->cursor.flags & KVMFR_CURSOR_FLAG_UPDATE))
{
// turn off the pos flag, trigger the event and continue
__sync_and_and_fetch(&state.shm->cursor.flags, ~KVMFR_CURSOR_FLAG_POS);
state.lgr->on_mouse_event
(
state.lgrData,
state.cursorVisible,
state.cursor.x,
state.cursor.y
);
continue;
}
// we must take a copy of the header to prevent the contained arguments
// from being abused to overflow buffers.
memcpy(&header, &state.shm->cursor, sizeof(struct KVMFRCursor));
if (header.flags & KVMFR_CURSOR_FLAG_SHAPE &&
header.version != version)
{
version = header.version;
bool bad = false;
switch(header.type)
{
case CURSOR_TYPE_COLOR : cursorType = LG_CURSOR_COLOR ; break;
case CURSOR_TYPE_MONOCHROME : cursorType = LG_CURSOR_MONOCHROME ; break;
case CURSOR_TYPE_MASKED_COLOR: cursorType = LG_CURSOR_MASKED_COLOR; break;
default:
DEBUG_ERROR("Invalid cursor type");
bad = true;
break;
}
if (bad)
break;
// check the data position is sane
const uint64_t dataSize = header.height * header.pitch;
if (header.dataPos + dataSize > state.shmSize)
{
DEBUG_ERROR("The guest sent an invalid mouse dataPos");
break;
}
const uint8_t * data = (const uint8_t *)state.shm + header.dataPos;
if (!state.lgr->on_mouse_shape(
state.lgrData,
cursorType,
header.width,
header.height,
header.pitch,
data)
)
{
DEBUG_ERROR("Failed to update mouse shape");
break;
}
}
// now we have taken the mouse data, we can flag to the host we are ready
state.shm->cursor.flags = 0;
bool showCursor = header.flags & KVMFR_CURSOR_FLAG_VISIBLE;
if (showCursor != state.cursorVisible || moved)
{
state.cursorVisible = showCursor;
state.lgr->on_mouse_event
(
state.lgrData,
state.cursorVisible,
state.cursor.x,
state.cursor.y
);
}
}
return 0;
}
static int frameThread(void * unused)
{
bool error = false;
KVMFRFrame header;
memset(&header, 0, sizeof(struct KVMFRFrame));
SDL_SetThreadPriority(SDL_THREAD_PRIORITY_HIGH);
while(state.running)
{
// poll until we have a new frame
while(!(state.shm->frame.flags & KVMFR_FRAME_FLAG_UPDATE))
{
if (!state.running)
break;
usleep(params.framePollInterval);
continue;
}
// we must take a copy of the header to prevent the contained
// arguments from being abused to overflow buffers.
memcpy(&header, &state.shm->frame, sizeof(struct KVMFRFrame));
// tell the host to continue as the host buffers up to one frame
// we can be sure the data for this frame wont be touched
__sync_and_and_fetch(&state.shm->frame.flags, ~KVMFR_FRAME_FLAG_UPDATE);
// sainty check of the frame format
if (
header.type >= FRAME_TYPE_MAX ||
header.width == 0 ||
header.height == 0 ||
header.pitch == 0 ||
header.dataPos == 0 ||
header.dataPos > state.shmSize ||
header.pitch < header.width
){
DEBUG_WARN("Bad header");
DEBUG_WARN(" width : %u" , header.width );
DEBUG_WARN(" height : %u" , header.height );
DEBUG_WARN(" pitch : %u" , header.pitch );
DEBUG_WARN(" dataPos: 0x%08lx", header.dataPos);
usleep(1000);
continue;
}
// setup the renderer format with the frame format details
LG_RendererFormat lgrFormat;
lgrFormat.type = header.type;
lgrFormat.width = header.width;
lgrFormat.height = header.height;
lgrFormat.stride = header.stride;
lgrFormat.pitch = header.pitch;
size_t dataSize;
switch(header.type)
{
case FRAME_TYPE_RGBA:
case FRAME_TYPE_BGRA:
case FRAME_TYPE_RGBA10:
dataSize = lgrFormat.height * lgrFormat.pitch;
lgrFormat.bpp = 32;
break;
case FRAME_TYPE_YUV420:
dataSize = lgrFormat.height * lgrFormat.width;
dataSize += (dataSize / 4) * 2;
lgrFormat.bpp = 12;
break;
default:
DEBUG_ERROR("Unsupported frameType");
error = true;
break;
}
if (error)
break;
// check the header's dataPos is sane
if (header.dataPos + dataSize > state.shmSize)
{
DEBUG_ERROR("The guest sent an invalid dataPos");
break;
}
if (header.width != state.srcSize.x || header.height != state.srcSize.y)
{
state.srcSize.x = header.width;
state.srcSize.y = header.height;
state.haveSrcSize = true;
if (params.autoResize)
SDL_SetWindowSize(state.window, header.width, header.height);
updatePositionInfo();
}
FrameBuffer frame = (FrameBuffer)((uint8_t *)state.shm + header.dataPos);
if (!state.lgr->on_frame_event(state.lgrData, lgrFormat, frame))
{
DEBUG_ERROR("renderer on frame event returned failure");
break;
}
++state.frameCount;
}
state.running = false;
return 0;
}
int spiceThread(void * arg)
{
while(state.running)
if (!spice_process())
{
if (state.running)
{
state.running = false;
DEBUG_ERROR("failed to process spice messages");
}
break;
}
state.running = false;
return 0;
}
static inline const uint32_t mapScancode(SDL_Scancode scancode)
{
uint32_t ps2;
if (scancode > (sizeof(usb_to_ps2) / sizeof(uint32_t)) || (ps2 = usb_to_ps2[scancode]) == 0)
{
DEBUG_WARN("Unable to map USB scan code: %x\n", scancode);
return 0;
}
return ps2;
}
static LG_ClipboardData spice_type_to_clipboard_type(const SpiceDataType type)
{
switch(type)
{
case SPICE_DATA_TEXT: return LG_CLIPBOARD_DATA_TEXT; break;
case SPICE_DATA_PNG : return LG_CLIPBOARD_DATA_PNG ; break;
case SPICE_DATA_BMP : return LG_CLIPBOARD_DATA_BMP ; break;
case SPICE_DATA_TIFF: return LG_CLIPBOARD_DATA_TIFF; break;
case SPICE_DATA_JPEG: return LG_CLIPBOARD_DATA_JPEG; break;
default:
DEBUG_ERROR("invalid spice data type");
return LG_CLIPBOARD_DATA_NONE;
}
}
static SpiceDataType clipboard_type_to_spice_type(const LG_ClipboardData type)
{
switch(type)
{
case LG_CLIPBOARD_DATA_TEXT: return SPICE_DATA_TEXT; break;
case LG_CLIPBOARD_DATA_PNG : return SPICE_DATA_PNG ; break;
case LG_CLIPBOARD_DATA_BMP : return SPICE_DATA_BMP ; break;
case LG_CLIPBOARD_DATA_TIFF: return SPICE_DATA_TIFF; break;
case LG_CLIPBOARD_DATA_JPEG: return SPICE_DATA_JPEG; break;
default:
DEBUG_ERROR("invalid clipboard data type");
return SPICE_DATA_NONE;
}
}
void clipboardRelease()
{
if (!params.clipboardToVM)
return;
spice_clipboard_release();
}
void clipboardNotify(const LG_ClipboardData type)
{
if (!params.clipboardToVM)
return;
if (type == LG_CLIPBOARD_DATA_NONE)
{
spice_clipboard_release();
return;
}
spice_clipboard_grab(clipboard_type_to_spice_type(type));
}
void clipboardData(const LG_ClipboardData type, uint8_t * data, size_t size)
{
if (!params.clipboardToVM)
return;
uint8_t * buffer = data;
// unix2dos
if (type == LG_CLIPBOARD_DATA_TEXT)
{
// TODO: make this more memory efficent
size_t newSize = 0;
buffer = malloc(size * 2);
uint8_t * p = buffer;
for(uint32_t i = 0; i < size; ++i)
{
uint8_t c = data[i];
if (c == '\n')
{
*p++ = '\r';
++newSize;
}
*p++ = c;
++newSize;
}
size = newSize;
}
spice_clipboard_data(clipboard_type_to_spice_type(type), buffer, (uint32_t)size);
if (buffer != data)
free(buffer);
}
void clipboardRequest(const LG_ClipboardReplyFn replyFn, void * opaque)
{
if (!params.clipboardToLocal)
return;
struct CBRequest * cbr = (struct CBRequest *)malloc(sizeof(struct CBRequest()));
cbr->type = state.cbType;
cbr->replyFn = replyFn;
cbr->opaque = opaque;
ll_push(state.cbRequestList, cbr);
spice_clipboard_request(state.cbType);
}
void spiceClipboardNotice(const SpiceDataType type)
{
if (!params.clipboardToLocal)
return;
if (!state.lgc || !state.lgc->notice)
return;
state.cbType = type;
state.lgc->notice(clipboardRequest, spice_type_to_clipboard_type(type));
}
void spiceClipboardData(const SpiceDataType type, uint8_t * buffer, uint32_t size)
{
if (!params.clipboardToLocal)
return;
if (type == SPICE_DATA_TEXT)
{
// dos2unix
uint8_t * p = buffer;
uint32_t newSize = size;
for(uint32_t i = 0; i < size; ++i)
{
uint8_t c = buffer[i];
if (c == '\r')
{
--newSize;
continue;
}
*p++ = c;
}
size = newSize;
}
struct CBRequest * cbr;
if (ll_shift(state.cbRequestList, (void **)&cbr))
{
cbr->replyFn(cbr->opaque, type, buffer, size);
free(cbr);
}
}
void spiceClipboardRelease()
{
if (!params.clipboardToLocal)
return;
if (state.lgc && state.lgc->release)
state.lgc->release();
}
void spiceClipboardRequest(const SpiceDataType type)
{
if (!params.clipboardToVM)
return;
if (state.lgc && state.lgc->request)
state.lgc->request(spice_type_to_clipboard_type(type));
}
int eventFilter(void * userdata, SDL_Event * event)
{
static bool serverMode = false;
static bool realignGuest = true;
switch(event->type)
{
case SDL_QUIT:
{
if (!params.ignoreQuit)
{
DEBUG_INFO("Quit event received, exiting...");
state.running = false;
}
return 0;
}
case SDL_WINDOWEVENT:
{
switch(event->window.event)
{
case SDL_WINDOWEVENT_ENTER:
realignGuest = true;
break;
case SDL_WINDOWEVENT_SIZE_CHANGED:
SDL_GetWindowSize(state.window, &state.windowW, &state.windowH);
updatePositionInfo();
realignGuest = true;
break;
// allow a window close event to close the application even if ignoreQuit is set
case SDL_WINDOWEVENT_CLOSE:
state.running = false;
break;
}
return 0;
}
case SDL_SYSWMEVENT:
{
if (params.useSpiceClipboard && state.lgc && state.lgc->wmevent)
state.lgc->wmevent(event->syswm.msg);
return 0;
}
case SDL_MOUSEMOTION:
{
if (state.ignoreInput || !params.useSpiceInput)
break;
if (
!serverMode && (
event->motion.x < state.dstRect.x ||
event->motion.x > state.dstRect.x + state.dstRect.w ||
event->motion.y < state.dstRect.y ||
event->motion.y > state.dstRect.y + state.dstRect.h
)
)
{
realignGuest = true;
break;
}
int x = 0;
int y = 0;
if (realignGuest && state.haveCursorPos)
{
x = event->motion.x - state.dstRect.x;
y = event->motion.y - state.dstRect.y;
if (params.scaleMouseInput && !serverMode)
{
x = (float)x * state.scaleX;
y = (float)y * state.scaleY;
}
x -= state.cursor.x;
y -= state.cursor.y;
realignGuest = false;
state.accX = 0;
state.accY = 0;
state.sensX = 0;
state.sensY = 0;
if (!spice_mouse_motion(x, y))
DEBUG_ERROR("SDL_MOUSEMOTION: failed to send message");
break;
}
x = event->motion.xrel;
y = event->motion.yrel;
if (x != 0 || y != 0)
{
if (params.scaleMouseInput && !serverMode)
{
state.accX += (float)x * state.scaleX;
state.accY += (float)y * state.scaleY;
x = floor(state.accX);
y = floor(state.accY);
state.accX -= x;
state.accY -= y;
}
if (serverMode && state.mouseSens != 0)
{
state.sensX += ((float)x / 10.0f) * (state.mouseSens + 10);
state.sensY += ((float)y / 10.0f) * (state.mouseSens + 10);
x = floor(state.sensX);
y = floor(state.sensY);
state.sensX -= x;
state.sensY -= y;
}
if (!spice_mouse_motion(x, y))
{
DEBUG_ERROR("SDL_MOUSEMOTION: failed to send message");
break;
}
}
break;
}
case SDL_KEYDOWN:
{
SDL_Scancode sc = event->key.keysym.scancode;
if (sc == params.escapeKey)
{
state.escapeActive = true;
state.escapeAction = -1;
break;
}
if (state.escapeActive)
{
state.escapeAction = sc;
break;
}
if (state.ignoreInput || !params.useSpiceInput)
break;
uint32_t scancode = mapScancode(sc);
if (scancode == 0)
break;
if (!state.keyDown[sc])
{
if (spice_key_down(scancode))
state.keyDown[sc] = true;
else
{
DEBUG_ERROR("SDL_KEYDOWN: failed to send message");
break;
}
}
break;
}
case SDL_KEYUP:
{
SDL_Scancode sc = event->key.keysym.scancode;
if (state.escapeActive)
{
if (state.escapeAction == -1)
{
if (params.useSpiceInput)
{
serverMode = !serverMode;
spice_mouse_mode(serverMode);
SDL_SetRelativeMouseMode(serverMode);
SDL_SetWindowGrab(state.window, serverMode);
DEBUG_INFO("Server Mode: %s", serverMode ? "on" : "off");
app_alert(
serverMode ? LG_ALERT_SUCCESS : LG_ALERT_WARNING,
serverMode ? "Capture Enabled" : "Capture Disabled"
);
if (!serverMode)
realignGuest = true;
}
}
else
{
KeybindHandle handle = state.bindings[sc];
if (handle)
handle->callback(sc, handle->opaque);
}
if (sc == params.escapeKey)
state.escapeActive = false;
}
if (state.ignoreInput || !params.useSpiceInput)
break;
// avoid sending key up events when we didn't send a down
if (!state.keyDown[sc])
break;
uint32_t scancode = mapScancode(sc);
if (scancode == 0)
break;
if (spice_key_up(scancode))
state.keyDown[sc] = false;
else
{
DEBUG_ERROR("SDL_KEYUP: failed to send message");
break;
}
break;
}
case SDL_MOUSEWHEEL:
if (state.ignoreInput || !params.useSpiceInput)
break;
if (
!spice_mouse_press (event->wheel.y == 1 ? 4 : 5) ||
!spice_mouse_release(event->wheel.y == 1 ? 4 : 5)
)
{
DEBUG_ERROR("SDL_MOUSEWHEEL: failed to send messages");
break;
}
break;
case SDL_MOUSEBUTTONDOWN:
if (state.ignoreInput || !params.useSpiceInput)
break;
// The SPICE protocol doesn't support more than a standard PS/2 3 button mouse
if (event->button.button > 3)
break;
if (
!spice_mouse_position(event->button.x, event->button.y) ||
!spice_mouse_press(event->button.button)
)
{
DEBUG_ERROR("SDL_MOUSEBUTTONDOWN: failed to send message");
break;
}
break;
case SDL_MOUSEBUTTONUP:
if (state.ignoreInput || !params.useSpiceInput)
break;
// The SPICE protocol doesn't support more than a standard PS/2 3 button mouse
if (event->button.button > 3)
break;
if (
!spice_mouse_position(event->button.x, event->button.y) ||
!spice_mouse_release(event->button.button)
)
{
DEBUG_ERROR("SDL_MOUSEBUTTONUP: failed to send message");
break;
}
break;
}
// consume all events
return 0;
}
void int_handler(int signal)
{
switch(signal)
{
case SIGINT:
case SIGTERM:
DEBUG_INFO("Caught signal, shutting down...");
state.running = false;
break;
}
}
static void * map_memory()
{
struct stat st;
if (stat(params.shmFile, &st) < 0)
{
DEBUG_ERROR("Failed to stat the shared memory file: %s", params.shmFile);
return NULL;
}
state.shmSize = params.shmSize ? params.shmSize : st.st_size;
state.shmFD = open(params.shmFile, O_RDWR, (mode_t)0600);
if (state.shmFD < 0)
{
DEBUG_ERROR("Failed to open the shared memory file: %s", params.shmFile);
return NULL;
}
void * map = mmap(0, state.shmSize, PROT_READ | PROT_WRITE, MAP_SHARED, state.shmFD, 0);
if (map == MAP_FAILED)
{
DEBUG_ERROR("Failed to map the shared memory file: %s", params.shmFile);
close(state.shmFD);
state.shmFD = 0;
return NULL;
}
return map;
}
static bool try_renderer(const int index, const LG_RendererParams lgrParams, Uint32 * sdlFlags)
{
const LG_Renderer *r = LG_Renderers[index];
if (!IS_LG_RENDERER_VALID(r))
{
DEBUG_ERROR("FIXME: Renderer %d is invalid, skipping", index);
return false;
}
// create the renderer
state.lgrData = NULL;
if (!r->create(&state.lgrData, lgrParams))
return false;
// initialize the renderer
if (!r->initialize(state.lgrData, sdlFlags))
{
r->deinitialize(state.lgrData);
return false;
}
DEBUG_INFO("Using Renderer: %s", r->get_name());
return true;
}
static void toggle_fullscreen(SDL_Scancode key, void * opaque)
{
SDL_SetWindowFullscreen(state.window, params.fullscreen ? 0 : SDL_WINDOW_FULLSCREEN_DESKTOP);
params.fullscreen = !params.fullscreen;
}
static void toggle_input(SDL_Scancode key, void * opaque)
{
state.ignoreInput = !state.ignoreInput;
app_alert(
LG_ALERT_INFO,
state.ignoreInput ? "Input Disabled" : "Input Enabled"
);
}
static void mouse_sens_inc(SDL_Scancode key, void * opaque)
{
char * msg;
if (state.mouseSens < 9)
++state.mouseSens;
alloc_sprintf(&msg, "Sensitivity: %s%d", state.mouseSens > 0 ? "+" : "", state.mouseSens);
app_alert(
LG_ALERT_INFO,
msg
);
free(msg);
}
static void mouse_sens_dec(SDL_Scancode key, void * opaque)
{
char * msg;
if (state.mouseSens > -9)
--state.mouseSens;
alloc_sprintf(&msg, "Sensitivity: %s%d", state.mouseSens > 0 ? "+" : "", state.mouseSens);
app_alert(
LG_ALERT_INFO,
msg
);
free(msg);
}
static void ctrl_alt_fn(SDL_Scancode key, void * opaque)
{
const uint32_t ctrl = mapScancode(SDL_SCANCODE_LCTRL);
const uint32_t alt = mapScancode(SDL_SCANCODE_LALT );
const uint32_t fn = mapScancode(key);
spice_key_down(ctrl);
spice_key_down(alt );
spice_key_down(fn );
spice_key_up(ctrl);
spice_key_up(alt );
spice_key_up(fn );
}
static void register_key_binds()
{
state.kbFS = app_register_keybind(SDL_SCANCODE_F , toggle_fullscreen, NULL);
state.kbInput = app_register_keybind(SDL_SCANCODE_I , toggle_input , NULL);
state.kbMouseSensInc = app_register_keybind(SDL_SCANCODE_INSERT, mouse_sens_inc , NULL);
state.kbMouseSensDec = app_register_keybind(SDL_SCANCODE_DELETE, mouse_sens_dec , NULL);
state.kbCtrlAltFn[0 ] = app_register_keybind(SDL_SCANCODE_F1 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[1 ] = app_register_keybind(SDL_SCANCODE_F2 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[2 ] = app_register_keybind(SDL_SCANCODE_F3 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[3 ] = app_register_keybind(SDL_SCANCODE_F4 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[4 ] = app_register_keybind(SDL_SCANCODE_F5 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[5 ] = app_register_keybind(SDL_SCANCODE_F6 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[6 ] = app_register_keybind(SDL_SCANCODE_F7 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[7 ] = app_register_keybind(SDL_SCANCODE_F8 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[8 ] = app_register_keybind(SDL_SCANCODE_F9 , ctrl_alt_fn, NULL);
state.kbCtrlAltFn[9 ] = app_register_keybind(SDL_SCANCODE_F10, ctrl_alt_fn, NULL);
state.kbCtrlAltFn[10] = app_register_keybind(SDL_SCANCODE_F11, ctrl_alt_fn, NULL);
state.kbCtrlAltFn[11] = app_register_keybind(SDL_SCANCODE_F12, ctrl_alt_fn, NULL);
}
static void release_key_binds()
{
app_release_keybind(&state.kbFS);
app_release_keybind(&state.kbInput);
for(int i = 0; i < 12; ++i)
app_release_keybind(&state.kbCtrlAltFn[i]);
}
static int lg_run()
{
memset(&state, 0, sizeof(state));
state.running = true;
state.scaleX = 1.0f;
state.scaleY = 1.0f;
state.mouseSens = params.mouseSens;
if (state.mouseSens < -9) state.mouseSens = -9;
else if (state.mouseSens > 9) state.mouseSens = 9;
char* XDG_SESSION_TYPE = getenv("XDG_SESSION_TYPE");
if (XDG_SESSION_TYPE == NULL)
XDG_SESSION_TYPE = "unspecified";
if (strcmp(XDG_SESSION_TYPE, "wayland") == 0)
{
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");
}
}
// warn about using FPS display until we can fix the font rendering to prevent lag spikes
if (params.showFPS)
{
DEBUG_WARN("================================================================================");
DEBUG_WARN("WARNING: The FPS display causes microstutters, this is a known issue" );
DEBUG_WARN("================================================================================");
}
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
DEBUG_ERROR("SDL_Init Failed");
return -1;
}
// override SDL's SIGINIT handler so that we can tell the difference between
// SIGINT and the user sending a close event, such as ALT+F4
signal(SIGINT , int_handler);
signal(SIGTERM, int_handler);
// try map the shared memory
state.shm = (struct KVMFRHeader *)map_memory();
if (!state.shm)
{
DEBUG_ERROR("Failed to map memory");
return -1;
}
// try to connect to the spice server
if (params.useSpiceInput || params.useSpiceClipboard)
{
spice_set_clipboard_cb(
spiceClipboardNotice,
spiceClipboardData,
spiceClipboardRelease,
spiceClipboardRequest);
if (!spice_connect(params.spiceHost, params.spicePort, ""))
{
DEBUG_ERROR("Failed to connect to spice server");
return -1;
}
while(state.running && !spice_ready())
if (!spice_process())
{
state.running = false;
DEBUG_ERROR("Failed to process spice messages");
return -1;
}
if (!(t_spice = SDL_CreateThread(spiceThread, "spiceThread", NULL)))
{
DEBUG_ERROR("spice create thread failed");
return -1;
}
}
// select and init a renderer
LG_RendererParams lgrParams;
lgrParams.showFPS = params.showFPS;
Uint32 sdlFlags;
if (params.forceRenderer)
{
DEBUG_INFO("Trying forced renderer");
sdlFlags = 0;
if (!try_renderer(params.forceRendererIndex, lgrParams, &sdlFlags))
{
DEBUG_ERROR("Forced renderer failed to iniailize");
return -1;
}
state.lgr = LG_Renderers[params.forceRendererIndex];
}
else
{
// probe for a a suitable renderer
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
{
sdlFlags = 0;
if (try_renderer(i, lgrParams, &sdlFlags))
{
state.lgr = LG_Renderers[i];
break;
}
}
}
if (!state.lgr)
{
DEBUG_INFO("Unable to find a suitable renderer");
return -1;
}
// all our ducks are in a line, create the window
state.window = SDL_CreateWindow(
params.windowTitle,
params.center ? SDL_WINDOWPOS_CENTERED : params.x,
params.center ? SDL_WINDOWPOS_CENTERED : params.y,
params.w,
params.h,
(
SDL_WINDOW_SHOWN |
(params.fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0) |
(params.allowResize ? SDL_WINDOW_RESIZABLE : 0) |
(params.borderless ? SDL_WINDOW_BORDERLESS : 0) |
(params.maximize ? SDL_WINDOW_MAXIMIZED : 0) |
sdlFlags
)
);
if (state.window == NULL)
{
DEBUG_ERROR("Could not create an SDL window: %s\n", SDL_GetError());
return 1;
}
if (params.fullscreen || !params.minimizeOnFocusLoss)
SDL_SetHint(SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS, "0");
if (!params.noScreensaver)
{
SDL_SetHint(SDL_HINT_VIDEO_ALLOW_SCREENSAVER, "1");
SDL_EnableScreenSaver();
}
if (!params.center)
SDL_SetWindowPosition(state.window, params.x, params.y);
// ensure the initial window size is stored in the state
SDL_GetWindowSize(state.window, &state.windowW, &state.windowH);
// ensure renderer viewport is aware of the current window size
updatePositionInfo();
//Auto detect active monitor refresh rate for FPS Limit if no FPS Limit was passed.
if (params.fpsLimit == -1)
{
SDL_DisplayMode current;
if (SDL_GetCurrentDisplayMode(SDL_GetWindowDisplayIndex(state.window), &current) == 0)
{
state.frameTime = 1e9 / (current.refresh_rate * 2);
}
else
{
DEBUG_WARN("Unable to capture monitor refresh rate using the default FPS Limit: 200");
state.frameTime = 1e9 / 200;
}
}
else
{
DEBUG_INFO("Using the FPS Limit from args: %d", params.fpsLimit);
state.frameTime = 1e9 / params.fpsLimit;
}
register_key_binds();
// set the compositor hint to bypass for low latency
SDL_SysWMinfo wminfo;
SDL_VERSION(&wminfo.version);
if (SDL_GetWindowWMInfo(state.window, &wminfo))
{
if (wminfo.subsystem == SDL_SYSWM_X11)
{
Atom NETWM_BYPASS_COMPOSITOR = XInternAtom(
wminfo.info.x11.display,
"NETWM_BYPASS_COMPOSITOR",
False);
unsigned long value = 1;
XChangeProperty(
wminfo.info.x11.display,
wminfo.info.x11.window,
NETWM_BYPASS_COMPOSITOR,
XA_CARDINAL,
32,
PropModeReplace,
(unsigned char *)&value,
1
);
state.lgc = LG_Clipboards[0];
}
} else {
DEBUG_ERROR("Could not get SDL window information %s", SDL_GetError());
return -1;
}
if (state.lgc)
{
DEBUG_INFO("Using Clipboard: %s", state.lgc->getName());
if (!state.lgc->init(&wminfo, clipboardRelease, clipboardNotify, clipboardData))
{
DEBUG_WARN("Failed to initialize the clipboard interface, continuing anyway");
state.lgc = NULL;
}
state.cbRequestList = ll_new();
}
if (params.hideMouse)
{
// work around SDL_ShowCursor being non functional
int32_t cursorData[2] = {0, 0};
cursor = SDL_CreateCursor((uint8_t*)cursorData, (uint8_t*)cursorData, 8, 8, 4, 4);
SDL_SetCursor(cursor);
SDL_ShowCursor(SDL_DISABLE);
}
// start the renderThread so we don't just display junk
if (!(t_render = SDL_CreateThread(renderThread, "renderThread", NULL)))
{
DEBUG_ERROR("render create thread failed");
return -1;
}
// ensure mouse acceleration is identical in server mode
SDL_SetHintWithPriority(SDL_HINT_MOUSE_RELATIVE_MODE_WARP, "1", SDL_HINT_OVERRIDE);
SDL_SetEventFilter(eventFilter, NULL);
// flag the host that we are starting up this is important so that
// the host wakes up if it is waiting on an interrupt, the host will
// also send us the current mouse shape since we won't know it yet
DEBUG_INFO("Waiting for host to signal it's ready...");
__sync_or_and_fetch(&state.shm->flags, KVMFR_HEADER_FLAG_RESTART);
while(state.running && (state.shm->flags & KVMFR_HEADER_FLAG_RESTART))
SDL_WaitEventTimeout(NULL, 1000);
if (!state.running)
return -1;
DEBUG_INFO("Host ready, starting session");
// check the header's magic and version are valid
if (memcmp(state.shm->magic, KVMFR_HEADER_MAGIC, sizeof(KVMFR_HEADER_MAGIC)) != 0)
{
DEBUG_ERROR("Invalid header magic, is the host running?");
return -1;
}
if (state.shm->version != KVMFR_HEADER_VERSION)
{
DEBUG_ERROR("KVMFR version missmatch, expected %u but got %u", KVMFR_HEADER_VERSION, state.shm->version);
DEBUG_ERROR("This is not a bug, ensure you have the right version of looking-glass-host.exe on the guest");
return -1;
}
if (!(state.t_frame = SDL_CreateThread(frameThread, "frameThread", NULL)))
{
DEBUG_ERROR("frame create thread failed");
return -1;
}
bool *closeAlert = NULL;
while(state.running)
{
SDL_WaitEventTimeout(NULL, 1000);
if (closeAlert == NULL)
{
if (state.shm->flags & KVMFR_HEADER_FLAG_PAUSED)
{
if (state.lgr && params.showAlerts)
state.lgr->on_alert(
state.lgrData,
LG_ALERT_WARNING,
"Stream Paused",
&closeAlert
);
}
}
else
{
if (!(state.shm->flags & KVMFR_HEADER_FLAG_PAUSED))
{
*closeAlert = true;
closeAlert = NULL;
}
}
}
return 0;
}
static void lg_shutdown()
{
state.running = false;
if (t_render)
SDL_WaitThread(t_render, NULL);
// if spice is still connected send key up events for any pressed keys
if (params.useSpiceInput && spice_ready())
{
for(int i = 0; i < SDL_NUM_SCANCODES; ++i)
if (state.keyDown[i])
{
uint32_t scancode = mapScancode(i);
if (scancode == 0)
continue;
state.keyDown[i] = false;
spice_key_up(scancode);
}
if (t_spice)
SDL_WaitThread(t_spice, NULL);
spice_disconnect();
}
if (state.lgc)
{
state.lgc->free();
struct CBRequest *cbr;
while(ll_shift(state.cbRequestList, (void **)&cbr))
free(cbr);
ll_free(state.cbRequestList);
}
if (state.window)
SDL_DestroyWindow(state.window);
if (cursor)
SDL_FreeCursor(cursor);
if (state.shm)
{
munmap(state.shm, state.shmSize);
close(state.shmFD);
}
release_key_binds();
SDL_Quit();
}
int main(int argc, char * argv[])
{
DEBUG_INFO("Looking Glass (" BUILD_VERSION ")");
DEBUG_INFO("Locking Method: " LG_LOCK_MODE);
if (!installCrashHandler("/proc/self/exe"))
DEBUG_WARN("Failed to install the crash handler");
config_init();
// early renderer setup for option registration
for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
LG_Renderers[i]->setup();
if (!config_load(argc, argv))
return -1;
if (params.grabKeyboard)
SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
const int ret = lg_run();
lg_shutdown();
config_free();
return ret;
}
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