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LookingGlass/client/src/main.c

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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 <stdatomic.h>
#include <linux/input.h>
#include "common/debug.h"
#include "common/crash.h"
#include "common/KVMFR.h"
#include "common/stringutils.h"
#include "common/thread.h"
#include "common/locking.h"
#include "common/event.h"
#include "common/ivshmem.h"
#include "common/time.h"
#include "common/version.h"
#include "utils.h"
#include "kb.h"
#include "ll.h"
#define RESIZE_TIMEOUT (10 * 1000) // 10ms
// forwards
static int cursorThread(void * unused);
static int renderThread(void * unused);
static int frameThread (void * unused);
static LGEvent *e_startup = NULL;
static LGEvent *e_frame = NULL;
static LGThread *t_spice = NULL;
static LGThread *t_render = NULL;
static LGThread *t_cursor = NULL;
static LGThread *t_frame = NULL;
static SDL_Cursor *cursor = NULL;
static Uint32 e_SDLEvent; // our SDL event
enum
{
LG_EVENT_ALIGN_TO_GUEST
};
struct AppState g_state;
struct CursorState g_cursor;
// this structure is initialized in config.c
struct AppParams params = { 0 };
static void setGrab(bool enable);
static void setGrabQuiet(bool enable);
static void setCursorInView(bool enable);
static void lgInit(void)
{
g_state.state = APP_STATE_RUNNING;
g_state.resizeDone = true;
g_cursor.useScale = false;
g_cursor.scale.x = 1.0;
g_cursor.scale.y = 1.0;
g_cursor.draw = false;
g_cursor.inView = false;
g_cursor.guest.valid = false;
}
bool app_getProp(LG_DSProperty prop, void * ret)
{
return g_state.ds->getProp(prop, ret);
}
SDL_Window * app_getWindow(void)
{
return g_state.window;
}
bool app_inputEnabled(void)
{
return params.useSpiceInput && !g_state.ignoreInput &&
((g_cursor.grab && params.captureInputOnly) || !params.captureInputOnly);
}
bool app_cursorInWindow(void)
{
return g_cursor.inWindow;
}
bool app_cursorIsGrabbed(void)
{
return g_cursor.grab;
}
bool app_cursorWantsRaw(void)
{
return params.rawMouse;
}
void app_updateCursorPos(double x, double y)
{
g_cursor.pos.x = x;
g_cursor.pos.y = y;
g_cursor.valid = true;
}
void app_handleFocusEvent(bool focused)
{
if (!app_inputEnabled())
return;
if (params.grabKeyboardOnFocus)
{
if (focused)
g_state.ds->grabKeyboard();
else
g_state.ds->ungrabKeyboard();
}
g_state.focused = focused;
g_cursor.realign = true;
g_state.ds->realignPointer();
}
void app_handleCloseEvent(void)
{
if (!params.ignoreQuit || !g_cursor.inView)
g_state.state = APP_STATE_SHUTDOWN;
}
static void alignToGuest(void)
{
if (SDL_HasEvent(e_SDLEvent))
return;
SDL_Event event;
SDL_memset(&event, 0, sizeof(event));
event.type = e_SDLEvent;
event.user.code = LG_EVENT_ALIGN_TO_GUEST;
SDL_PushEvent(&event);
}
static void updatePositionInfo(void)
{
if (!g_state.haveSrcSize)
goto done;
float srcW;
float srcH;
switch(params.winRotate)
{
case LG_ROTATE_0:
case LG_ROTATE_180:
srcW = g_state.srcSize.x;
srcH = g_state.srcSize.y;
break;
case LG_ROTATE_90:
case LG_ROTATE_270:
srcW = g_state.srcSize.y;
srcH = g_state.srcSize.x;
break;
}
if (params.keepAspect)
{
const float srcAspect = srcH / srcW;
const float wndAspect = (float)g_state.windowH / (float)g_state.windowW;
bool force = true;
if (params.dontUpscale &&
srcW <= g_state.windowW &&
srcH <= g_state.windowH)
{
force = false;
g_state.dstRect.w = srcW;
g_state.dstRect.h = srcH;
g_state.dstRect.x = g_state.windowCX - srcW / 2;
g_state.dstRect.y = g_state.windowCY - srcH / 2;
}
else
if ((int)(wndAspect * 1000) == (int)(srcAspect * 1000))
{
force = false;
g_state.dstRect.w = g_state.windowW;
g_state.dstRect.h = g_state.windowH;
g_state.dstRect.x = 0;
g_state.dstRect.y = 0;
}
else
if (wndAspect < srcAspect)
{
g_state.dstRect.w = (float)g_state.windowH / srcAspect;
g_state.dstRect.h = g_state.windowH;
g_state.dstRect.x = (g_state.windowW >> 1) - (g_state.dstRect.w >> 1);
g_state.dstRect.y = 0;
}
else
{
g_state.dstRect.w = g_state.windowW;
g_state.dstRect.h = (float)g_state.windowW * srcAspect;
g_state.dstRect.x = 0;
g_state.dstRect.y = (g_state.windowH >> 1) - (g_state.dstRect.h >> 1);
}
if (force && params.forceAspect)
{
g_state.resizeTimeout = microtime() + RESIZE_TIMEOUT;
g_state.resizeDone = false;
}
}
else
{
g_state.dstRect.x = 0;
g_state.dstRect.y = 0;
g_state.dstRect.w = g_state.windowW;
g_state.dstRect.h = g_state.windowH;
}
g_state.dstRect.valid = true;
g_cursor.useScale = (
srcH != g_state.dstRect.h ||
srcW != g_state.dstRect.w ||
g_cursor.guest.dpiScale != 100);
g_cursor.scale.x = (float)srcH / (float)g_state.dstRect.h;
g_cursor.scale.y = (float)srcW / (float)g_state.dstRect.w;
g_cursor.dpiScale = g_cursor.guest.dpiScale / 100.0f;
if (!g_state.posInfoValid)
{
g_state.posInfoValid = true;
alignToGuest();
}
done:
atomic_fetch_add(&g_state.lgrResize, 1);
}
static int renderThread(void * unused)
{
if (!g_state.lgr->render_startup(g_state.lgrData, g_state.window))
{
g_state.state = APP_STATE_SHUTDOWN;
/* unblock threads waiting on the condition */
lgSignalEvent(e_startup);
return 1;
}
/* signal to other threads that the renderer is ready */
lgSignalEvent(e_startup);
struct timespec time;
clock_gettime(CLOCK_MONOTONIC, &time);
while(g_state.state != APP_STATE_SHUTDOWN)
{
if (params.fpsMin != 0)
{
lgWaitEventAbs(e_frame, &time);
clock_gettime(CLOCK_MONOTONIC, &time);
tsAdd(&time, g_state.frameTime);
}
int resize = atomic_load(&g_state.lgrResize);
if (resize)
{
if (g_state.lgr)
g_state.lgr->on_resize(g_state.lgrData, g_state.windowW, g_state.windowH,
g_state.dstRect, params.winRotate);
atomic_compare_exchange_weak(&g_state.lgrResize, &resize, 0);
}
if (!g_state.lgr->render(g_state.lgrData, g_state.window, params.winRotate))
break;
if (params.showFPS)
{
const uint64_t t = nanotime();
g_state.renderTime += t - g_state.lastFrameTime;
g_state.lastFrameTime = t;
++g_state.renderCount;
if (g_state.renderTime > 1e9)
{
const float avgUPS = 1000.0f / (((float)g_state.renderTime /
atomic_exchange_explicit(&g_state.frameCount, 0, memory_order_acquire)) /
1e6f);
const float avgFPS = 1000.0f / (((float)g_state.renderTime /
g_state.renderCount) /
1e6f);
g_state.lgr->update_fps(g_state.lgrData, avgUPS, avgFPS);
g_state.renderTime = 0;
g_state.renderCount = 0;
}
}
if (!g_state.resizeDone && g_state.resizeTimeout < microtime())
{
SDL_SetWindowSize(
g_state.window,
g_state.dstRect.w,
g_state.dstRect.h
);
g_state.resizeDone = true;
}
}
g_state.state = APP_STATE_SHUTDOWN;
if (t_cursor)
lgJoinThread(t_cursor, NULL);
if (t_frame)
lgJoinThread(t_frame, NULL);
g_state.lgr->deinitialize(g_state.lgrData);
g_state.lgr = NULL;
return 0;
}
static int cursorThread(void * unused)
{
LGMP_STATUS status;
PLGMPClientQueue queue;
LG_RendererCursor cursorType = LG_CURSOR_COLOR;
lgWaitEvent(e_startup, TIMEOUT_INFINITE);
// subscribe to the pointer queue
while(g_state.state == APP_STATE_RUNNING)
{
status = lgmpClientSubscribe(g_state.lgmp, LGMP_Q_POINTER, &queue);
if (status == LGMP_OK)
break;
if (status == LGMP_ERR_NO_SUCH_QUEUE)
{
usleep(1000);
continue;
}
DEBUG_ERROR("lgmpClientSubscribe Failed: %s", lgmpStatusString(status));
g_state.state = APP_STATE_SHUTDOWN;
break;
}
while(g_state.state == APP_STATE_RUNNING)
{
LGMPMessage msg;
if ((status = lgmpClientProcess(queue, &msg)) != LGMP_OK)
{
if (status == LGMP_ERR_QUEUE_EMPTY)
{
if (g_cursor.redraw && g_cursor.guest.valid)
{
g_cursor.redraw = false;
g_state.lgr->on_mouse_event
(
g_state.lgrData,
g_cursor.guest.visible && g_cursor.draw,
g_cursor.guest.x,
g_cursor.guest.y
);
lgSignalEvent(e_frame);
}
const struct timespec req =
{
.tv_sec = 0,
.tv_nsec = params.cursorPollInterval * 1000L
};
struct timespec rem;
while(nanosleep(&req, &rem) < 0)
if (errno != -EINTR)
{
DEBUG_ERROR("nanosleep failed");
break;
}
continue;
}
if (status == LGMP_ERR_INVALID_SESSION)
g_state.state = APP_STATE_RESTART;
else
{
DEBUG_ERROR("lgmpClientProcess Failed: %s", lgmpStatusString(status));
g_state.state = APP_STATE_SHUTDOWN;
}
break;
}
KVMFRCursor * cursor = (KVMFRCursor *)msg.mem;
g_cursor.guest.visible =
msg.udata & CURSOR_FLAG_VISIBLE;
if (msg.udata & CURSOR_FLAG_SHAPE)
{
switch(cursor->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");
lgmpClientMessageDone(queue);
continue;
}
g_cursor.guest.hx = cursor->hx;
g_cursor.guest.hy = cursor->hy;
const uint8_t * data = (const uint8_t *)(cursor + 1);
if (!g_state.lgr->on_mouse_shape(
g_state.lgrData,
cursorType,
cursor->width,
cursor->height,
cursor->pitch,
data)
)
{
DEBUG_ERROR("Failed to update mouse shape");
lgmpClientMessageDone(queue);
continue;
}
}
if (msg.udata & CURSOR_FLAG_POSITION)
{
bool valid = g_cursor.guest.valid;
g_cursor.guest.x = cursor->x;
g_cursor.guest.y = cursor->y;
g_cursor.guest.valid = true;
// if the state just became valid
if (valid != true && app_inputEnabled())
alignToGuest();
}
lgmpClientMessageDone(queue);
g_cursor.redraw = false;
g_state.lgr->on_mouse_event
(
g_state.lgrData,
g_cursor.guest.visible && g_cursor.draw,
g_cursor.guest.x,
g_cursor.guest.y
);
if (params.mouseRedraw)
lgSignalEvent(e_frame);
}
lgmpClientUnsubscribe(&queue);
return 0;
}
static int frameThread(void * unused)
{
struct DMAFrameInfo
{
KVMFRFrame * frame;
size_t dataSize;
int fd;
};
LGMP_STATUS status;
PLGMPClientQueue queue;
uint32_t formatVer = 0;
bool formatValid = false;
size_t dataSize;
LG_RendererFormat lgrFormat;
struct DMAFrameInfo dmaInfo[LGMP_Q_FRAME_LEN] = {0};
const bool useDMA =
params.allowDMA &&
ivshmemHasDMA(&g_state.shm) &&
g_state.lgr->supports &&
g_state.lgr->supports(g_state.lgrData, LG_SUPPORTS_DMABUF);
if (useDMA)
DEBUG_INFO("Using DMA buffer support");
SDL_SetThreadPriority(SDL_THREAD_PRIORITY_HIGH);
lgWaitEvent(e_startup, TIMEOUT_INFINITE);
if (g_state.state != APP_STATE_RUNNING)
return 0;
// subscribe to the frame queue
while(g_state.state == APP_STATE_RUNNING)
{
status = lgmpClientSubscribe(g_state.lgmp, LGMP_Q_FRAME, &queue);
if (status == LGMP_OK)
break;
if (status == LGMP_ERR_NO_SUCH_QUEUE)
{
usleep(1000);
continue;
}
DEBUG_ERROR("lgmpClientSubscribe Failed: %s", lgmpStatusString(status));
g_state.state = APP_STATE_SHUTDOWN;
break;
}
while(g_state.state == APP_STATE_RUNNING && !g_state.stopVideo)
{
LGMPMessage msg;
if ((status = lgmpClientProcess(queue, &msg)) != LGMP_OK)
{
if (status == LGMP_ERR_QUEUE_EMPTY)
{
const struct timespec req =
{
.tv_sec = 0,
.tv_nsec = params.framePollInterval * 1000L
};
struct timespec rem;
while(nanosleep(&req, &rem) < 0)
if (errno != -EINTR)
{
DEBUG_ERROR("nanosleep failed");
break;
}
continue;
}
if (status == LGMP_ERR_INVALID_SESSION)
g_state.state = APP_STATE_RESTART;
else
{
DEBUG_ERROR("lgmpClientProcess Failed: %s", lgmpStatusString(status));
g_state.state = APP_STATE_SHUTDOWN;
}
break;
}
KVMFRFrame * frame = (KVMFRFrame *)msg.mem;
struct DMAFrameInfo *dma = NULL;
if (!formatValid || frame->formatVer != formatVer)
{
// setup the renderer format with the frame format details
lgrFormat.type = frame->type;
lgrFormat.width = frame->width;
lgrFormat.height = frame->height;
lgrFormat.stride = frame->stride;
lgrFormat.pitch = frame->pitch;
switch(frame->rotation)
{
case FRAME_ROT_0 : lgrFormat.rotate = LG_ROTATE_0 ; break;
case FRAME_ROT_90 : lgrFormat.rotate = LG_ROTATE_90 ; break;
case FRAME_ROT_180: lgrFormat.rotate = LG_ROTATE_180; break;
case FRAME_ROT_270: lgrFormat.rotate = LG_ROTATE_270; break;
}
g_state.rotate = lgrFormat.rotate;
bool error = false;
switch(frame->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_RGBA16F:
dataSize = lgrFormat.height * lgrFormat.pitch;
lgrFormat.bpp = 64;
break;
default:
DEBUG_ERROR("Unsupported frameType");
error = true;
break;
}
if (error)
{
lgmpClientMessageDone(queue);
g_state.state = APP_STATE_SHUTDOWN;
break;
}
formatValid = true;
formatVer = frame->formatVer;
DEBUG_INFO("Format: %s %ux%u stride:%u pitch:%u rotation:%d",
FrameTypeStr[frame->type],
frame->width, frame->height,
frame->stride, frame->pitch,
frame->rotation);
if (!g_state.lgr->on_frame_format(g_state.lgrData, lgrFormat, useDMA))
{
DEBUG_ERROR("renderer failed to configure format");
g_state.state = APP_STATE_SHUTDOWN;
break;
}
g_state.srcSize.x = lgrFormat.width;
g_state.srcSize.y = lgrFormat.height;
g_state.haveSrcSize = true;
if (params.autoResize)
SDL_SetWindowSize(g_state.window, lgrFormat.width, lgrFormat.height);
g_cursor.guest.dpiScale = frame->mouseScalePercent;
updatePositionInfo();
}
if (useDMA)
{
/* find the existing dma buffer if it exists */
for(int i = 0; i < sizeof(dmaInfo) / sizeof(struct DMAFrameInfo); ++i)
{
if (dmaInfo[i].frame == frame)
{
dma = &dmaInfo[i];
/* if it's too small close it */
if (dma->dataSize < dataSize)
{
close(dma->fd);
dma->fd = -1;
}
break;
}
}
/* otherwise find a free buffer for use */
if (!dma)
for(int i = 0; i < sizeof(dmaInfo) / sizeof(struct DMAFrameInfo); ++i)
{
if (!dmaInfo[i].frame)
{
dma = &dmaInfo[i];
dma->frame = frame;
dma->fd = -1;
break;
}
}
/* open the buffer */
if (dma->fd == -1)
{
const uintptr_t pos = (uintptr_t)msg.mem - (uintptr_t)g_state.shm.mem;
const uintptr_t offset = (uintptr_t)frame->offset + FrameBufferStructSize;
dma->dataSize = dataSize;
dma->fd = ivshmemGetDMABuf(&g_state.shm, pos + offset, dataSize);
if (dma->fd < 0)
{
DEBUG_ERROR("Failed to get the DMA buffer for the frame");
g_state.state = APP_STATE_SHUTDOWN;
break;
}
}
}
FrameBuffer * fb = (FrameBuffer *)(((uint8_t*)frame) + frame->offset);
if (!g_state.lgr->on_frame(g_state.lgrData, fb, useDMA ? dma->fd : -1))
{
lgmpClientMessageDone(queue);
DEBUG_ERROR("renderer on frame returned failure");
g_state.state = APP_STATE_SHUTDOWN;
break;
}
atomic_fetch_add_explicit(&g_state.frameCount, 1, memory_order_relaxed);
lgSignalEvent(e_frame);
lgmpClientMessageDone(queue);
}
lgmpClientUnsubscribe(&queue);
g_state.lgr->on_restart(g_state.lgrData);
if (useDMA)
{
for(int i = 0; i < sizeof(dmaInfo) / sizeof(struct DMAFrameInfo); ++i)
if (dmaInfo[i].fd >= 0)
close(dmaInfo[i].fd);
}
return 0;
}
int spiceThread(void * arg)
{
while(g_state.state != APP_STATE_SHUTDOWN)
if (!spice_process(1000))
{
if (g_state.state != APP_STATE_SHUTDOWN)
{
g_state.state = APP_STATE_SHUTDOWN;
DEBUG_ERROR("failed to process spice messages");
}
break;
}
g_state.state = APP_STATE_SHUTDOWN;
return 0;
}
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 app_clipboardRelease(void)
{
if (!params.clipboardToVM)
return;
spice_clipboard_release();
}
void app_clipboardNotify(const LG_ClipboardData type, size_t size)
{
if (!params.clipboardToVM)
return;
if (type == LG_CLIPBOARD_DATA_NONE)
{
spice_clipboard_release();
return;
}
g_state.cbType = clipboard_type_to_spice_type(type);
g_state.cbChunked = size > 0;
g_state.cbXfer = size;
spice_clipboard_grab(g_state.cbType);
if (size)
spice_clipboard_data_start(g_state.cbType, size);
}
void app_clipboardData(const LG_ClipboardData type, uint8_t * data, size_t size)
{
if (!params.clipboardToVM)
return;
if (g_state.cbChunked && size > g_state.cbXfer)
{
DEBUG_ERROR("refusing to send more then cbXfer bytes for chunked xfer");
size = g_state.cbXfer;
}
if (!g_state.cbChunked)
spice_clipboard_data_start(g_state.cbType, size);
spice_clipboard_data(g_state.cbType, data, (uint32_t)size);
g_state.cbXfer -= size;
}
void app_clipboardRequest(const LG_ClipboardReplyFn replyFn, void * opaque)
{
if (!params.clipboardToLocal)
return;
struct CBRequest * cbr = (struct CBRequest *)malloc(sizeof(struct CBRequest));
cbr->type = g_state.cbType;
cbr->replyFn = replyFn;
cbr->opaque = opaque;
ll_push(g_state.cbRequestList, cbr);
spice_clipboard_request(g_state.cbType);
}
void spiceClipboardNotice(const SpiceDataType type)
{
if (!params.clipboardToLocal)
return;
if (!g_state.cbAvailable)
return;
g_state.cbType = type;
g_state.ds->cbNotice(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(g_state.cbRequestList, (void **)&cbr))
{
cbr->replyFn(cbr->opaque, spice_type_to_clipboard_type(type), buffer, size);
free(cbr);
}
}
void spiceClipboardRelease(void)
{
if (!params.clipboardToLocal)
return;
if (g_state.cbAvailable)
g_state.ds->cbRelease();
}
void spiceClipboardRequest(const SpiceDataType type)
{
if (!params.clipboardToVM)
return;
if (g_state.cbAvailable)
g_state.ds->cbRequest(spice_type_to_clipboard_type(type));
}
static bool warpPointer(int x, int y, bool exiting)
{
if (!g_cursor.inWindow)
return false;
if (g_cursor.warpState == WARP_STATE_OFF)
return false;
if (exiting)
g_cursor.warpState = WARP_STATE_OFF;
if (g_cursor.pos.x == x && g_cursor.pos.y == y)
return true;
g_state.ds->warpPointer(x, y, exiting);
return true;
}
static bool isValidCursorLocation(int x, int y)
{
const int displays = SDL_GetNumVideoDisplays();
for(int i = 0; i < displays; ++i)
{
SDL_Rect r;
SDL_GetDisplayBounds(i, &r);
if ((x >= r.x && x < r.x + r.w) &&
(y >= r.y && y < r.y + r.h))
return true;
}
return false;
}
static void cursorToInt(double ex, double ey, int *x, int *y)
{
/* only smooth if enabled and not using raw mode */
if (params.mouseSmoothing && !(g_cursor.grab && params.rawMouse))
{
static struct DoublePoint last = { 0 };
/* only apply smoothing to small deltas */
if (fabs(ex - last.x) < 5.0 && fabs(ey - last.y) < 5.0)
{
ex = last.x = (last.x + ex) / 2.0;
ey = last.y = (last.y + ey) / 2.0;
}
else
{
last.x = ex;
last.y = ey;
}
}
/* convert to int accumulating the fractional error */
ex += g_cursor.acc.x;
ey += g_cursor.acc.y;
g_cursor.acc.x = modf(ex, &ex);
g_cursor.acc.y = modf(ey, &ey);
*x = (int)ex;
*y = (int)ey;
}
static void setCursorInView(bool enable)
{
// if the state has not changed, don't do anything else
if (g_cursor.inView == enable)
return;
if (enable && !g_state.focused)
return;
// do not allow the view to become active if any mouse buttons are being held,
// this fixes issues with meta window resizing.
if (enable && g_cursor.buttons)
return;
g_cursor.inView = enable;
g_cursor.draw = params.alwaysShowCursor ? true : enable;
g_cursor.redraw = true;
/* if the display server does not support warp, then we can not operate in
* always relative mode and we should not grab the pointer */
bool warpSupport = true;
app_getProp(LG_DS_WARP_SUPPORT, &warpSupport);
g_cursor.warpState = enable ? WARP_STATE_ON : WARP_STATE_OFF;
if (enable)
{
if (params.hideMouse)
SDL_ShowCursor(SDL_DISABLE);
if (warpSupport)
g_state.ds->grabPointer();
}
else
{
if (params.hideMouse)
SDL_ShowCursor(SDL_ENABLE);
if (warpSupport)
g_state.ds->ungrabPointer();
setGrabQuiet(false);
}
g_cursor.warpState = WARP_STATE_ON;
}
void app_handleMouseGrabbed(double ex, double ey)
{
/* do not pass mouse events to the guest if we do not have focus */
if (!g_state.focused)
return;
if (!app_inputEnabled())
return;
int x, y;
if (params.rawMouse && !g_cursor.useScale)
{
/* raw unscaled input are always round numbers */
x = floor(ex);
y = floor(ey);
}
else
{
/* apply sensitivity */
ex = (ex / 10.0) * (g_cursor.sens + 10);
ey = (ey / 10.0) * (g_cursor.sens + 10);
cursorToInt(ex, ey, &x, &y);
}
if (x == 0 && y == 0)
return;
if (!spice_mouse_motion(x, y))
DEBUG_ERROR("failed to send mouse motion message");
}
void app_handleButtonPress(int button)
{
if (!app_inputEnabled() || !g_cursor.inView)
return;
g_cursor.buttons |= (1U << button);
if (!spice_mouse_press(button))
DEBUG_ERROR("SDL_MOUSEBUTTONDOWN: failed to send message");
}
void app_handleButtonRelease(int button)
{
if (!app_inputEnabled())
return;
g_cursor.buttons &= ~(1U << button);
if (!spice_mouse_release(button))
DEBUG_ERROR("SDL_MOUSEBUTTONUP: failed to send message");
}
void app_handleKeyPress(int sc)
{
if (sc == params.escapeKey && !g_state.escapeActive)
{
g_state.escapeActive = true;
g_state.escapeAction = -1;
return;
}
if (g_state.escapeActive)
{
g_state.escapeAction = sc;
return;
}
if (!app_inputEnabled())
return;
if (params.ignoreWindowsKeys && (sc == KEY_LEFTMETA || sc == KEY_RIGHTMETA))
return;
if (!g_state.keyDown[sc])
{
uint32_t ps2 = xfree86_to_ps2[sc];
if (!ps2)
return;
if (spice_key_down(ps2))
g_state.keyDown[sc] = true;
else
{
DEBUG_ERROR("SDL_KEYDOWN: failed to send message");
return;
}
}
}
void app_handleKeyRelease(int sc)
{
if (g_state.escapeActive)
{
if (g_state.escapeAction == -1)
{
if (params.useSpiceInput)
setGrab(!g_cursor.grab);
}
else
{
KeybindHandle handle = g_state.bindings[sc];
if (handle)
{
handle->callback(sc, handle->opaque);
return;
}
}
if (sc == params.escapeKey)
g_state.escapeActive = false;
}
if (!app_inputEnabled())
return;
// avoid sending key up events when we didn't send a down
if (!g_state.keyDown[sc])
return;
if (params.ignoreWindowsKeys && (sc == KEY_LEFTMETA || sc == KEY_RIGHTMETA))
return;
uint32_t ps2 = xfree86_to_ps2[sc];
if (!ps2)
return;
if (spice_key_up(ps2))
g_state.keyDown[sc] = false;
else
{
DEBUG_ERROR("SDL_KEYUP: failed to send message");
return;
}
}
static void rotatePoint(struct DoublePoint *point)
{
double temp;
switch((g_state.rotate + params.winRotate) % LG_ROTATE_MAX)
{
case LG_ROTATE_0:
break;
case LG_ROTATE_90:
temp = point->x;
point->x = point->y;
point->y = -temp;
break;
case LG_ROTATE_180:
point->x = -point->x;
point->y = -point->y;
break;
case LG_ROTATE_270:
temp = point->x;
point->x = -point->y;
point->y = temp;
break;
}
}
static bool guestCurToLocal(struct DoublePoint *local)
{
if (!g_cursor.guest.valid || !g_state.posInfoValid)
return false;
const struct DoublePoint point =
{
.x = g_cursor.guest.x + g_cursor.guest.hx,
.y = g_cursor.guest.y + g_cursor.guest.hy
};
switch((g_state.rotate + params.winRotate) % LG_ROTATE_MAX)
{
case LG_ROTATE_0:
local->x = (point.x / g_cursor.scale.x) + g_state.dstRect.x;
local->y = (point.y / g_cursor.scale.y) + g_state.dstRect.y;;
break;
case LG_ROTATE_90:
local->x = (g_state.dstRect.x + g_state.dstRect.w) -
point.y / g_cursor.scale.y;
local->y = (point.x / g_cursor.scale.x) + g_state.dstRect.y;
break;
case LG_ROTATE_180:
local->x = (g_state.dstRect.x + g_state.dstRect.w) -
point.x / g_cursor.scale.x;
local->y = (g_state.dstRect.y + g_state.dstRect.h) -
point.y / g_cursor.scale.y;
break;
case LG_ROTATE_270:
local->x = (point.y / g_cursor.scale.y) + g_state.dstRect.x;
local->y = (g_state.dstRect.y + g_state.dstRect.h) -
point.x / g_cursor.scale.x;
break;
}
return true;
}
inline static void localCurToGuest(struct DoublePoint *guest)
{
const struct DoublePoint point =
g_cursor.pos;
switch((g_state.rotate + params.winRotate) % LG_ROTATE_MAX)
{
case LG_ROTATE_0:
guest->x = (point.x - g_state.dstRect.x) * g_cursor.scale.x;
guest->y = (point.y - g_state.dstRect.y) * g_cursor.scale.y;
break;
case LG_ROTATE_90:
guest->x = (point.y - g_state.dstRect.y) * g_cursor.scale.y;
guest->y = (g_state.dstRect.w - point.x + g_state.dstRect.x)
* g_cursor.scale.x;
break;
case LG_ROTATE_180:
guest->x = (g_state.dstRect.w - point.x + g_state.dstRect.x)
* g_cursor.scale.x;
guest->y = (g_state.dstRect.h - point.y + g_state.dstRect.y)
* g_cursor.scale.y;
break;
case LG_ROTATE_270:
guest->x = (g_state.dstRect.h - point.y + g_state.dstRect.y)
* g_cursor.scale.y;
guest->y = (point.x - g_state.dstRect.x) * g_cursor.scale.x;
break;
}
}
void app_handleMouseNormal(double ex, double ey)
{
// prevent cursor handling outside of capture if the position is not known
if (!g_cursor.guest.valid)
return;
if (!app_inputEnabled())
return;
/* scale the movement to the guest */
if (g_cursor.useScale && params.scaleMouseInput)
{
ex *= g_cursor.scale.x / g_cursor.dpiScale;
ey *= g_cursor.scale.y / g_cursor.dpiScale;
}
bool testExit = true;
if (!g_cursor.inView)
{
const bool inView =
g_cursor.pos.x >= g_state.dstRect.x &&
g_cursor.pos.x < g_state.dstRect.x + g_state.dstRect.w &&
g_cursor.pos.y >= g_state.dstRect.y &&
g_cursor.pos.y < g_state.dstRect.y + g_state.dstRect.h;
setCursorInView(inView);
}
/* nothing to do if we are outside the viewport */
if (!g_cursor.inView)
return;
/*
* do not pass mouse events to the guest if we do not have focus, this must be
* done after the inView test has been performed so that when focus is gained
* we know if we should be drawing the cursor.
*/
if (!g_state.focused)
return;
/* if we have been instructed to realign */
if (g_cursor.realign)
{
g_cursor.realign = false;
struct DoublePoint guest;
localCurToGuest(&guest);
/* add the difference to the offset */
ex += guest.x - (g_cursor.guest.x + g_cursor.guest.hx);
ey += guest.y - (g_cursor.guest.y + g_cursor.guest.hy);
/* don't test for an exit as we just entered, we can get into a enter/exit
* loop otherwise */
testExit = false;
}
/* if we are in "autoCapture" and the delta was large don't test for exit */
if (params.autoCapture &&
(fabs(ex) > 100.0 / g_cursor.scale.x || fabs(ey) > 100.0 / g_cursor.scale.y))
testExit = false;
/* if any buttons are held we should not allow exit to happen */
if (g_cursor.buttons)
testExit = false;
if (testExit)
{
/* translate the move to the guests orientation */
struct DoublePoint move = {.x = ex, .y = ey};
rotatePoint(&move);
/* translate the guests position to our coordinate space */
struct DoublePoint local;
guestCurToLocal(&local);
/* check if the move would push the cursor outside the guest's viewport */
if (
local.x + move.x < g_state.dstRect.x ||
local.y + move.y < g_state.dstRect.y ||
local.x + move.x >= g_state.dstRect.x + g_state.dstRect.w ||
local.y + move.y >= g_state.dstRect.y + g_state.dstRect.h)
{
local.x += move.x;
local.y += move.y;
const int tx = (local.x <= 0.0) ? floor(local.x) : ceil(local.x);
const int ty = (local.y <= 0.0) ? floor(local.y) : ceil(local.y);
if (isValidCursorLocation(
g_state.windowPos.x + g_state.border.x + tx,
g_state.windowPos.y + g_state.border.y + ty))
{
setCursorInView(false);
/* preempt the window leave flag if the warp will leave our window */
if (tx < 0 || ty < 0 || tx > g_state.windowW || ty > g_state.windowH)
g_cursor.inWindow = false;
/* ungrab the pointer and move the local cursor to the exit point */
g_state.ds->ungrabPointer();
warpPointer(tx, ty, true);
return;
}
}
}
int x, y;
cursorToInt(ex, ey, &x, &y);
if (x == 0 && y == 0)
return;
if (params.autoCapture)
{
g_cursor.delta.x += x;
g_cursor.delta.y += y;
if (fabs(g_cursor.delta.x) > 50.0 || fabs(g_cursor.delta.y) > 50.0)
{
g_cursor.delta.x = 0;
g_cursor.delta.y = 0;
warpPointer(g_state.windowCX, g_state.windowCY, false);
}
g_cursor.guest.x = g_state.srcSize.x / 2;
g_cursor.guest.y = g_state.srcSize.y / 2;
}
else
{
/* assume the mouse will move to the location we attempt to move it to so we
* avoid warp out of window issues. The cursorThread will correct this if
* wrong after the movement has ocurred on the guest */
g_cursor.guest.x += x;
g_cursor.guest.y += y;
}
if (!spice_mouse_motion(x, y))
DEBUG_ERROR("failed to send mouse motion message");
}
// On some display servers normal cursor logic does not work due to the lack of
// cursor warp support. Instead, we attempt a best-effort emulation which works
// with a 1:1 mouse movement patch applied in the guest. For anything fancy, use
// capture mode.
void app_handleMouseBasic()
{
/* do not pass mouse events to the guest if we do not have focus */
if (!g_state.focused)
return;
if (!app_inputEnabled())
return;
const bool inView =
g_cursor.pos.x >= g_state.dstRect.x &&
g_cursor.pos.x < g_state.dstRect.x + g_state.dstRect.w &&
g_cursor.pos.y >= g_state.dstRect.y &&
g_cursor.pos.y < g_state.dstRect.y + g_state.dstRect.h;
setCursorInView(inView);
if (g_cursor.guest.dpiScale == 0)
return;
double px = g_cursor.pos.x;
double py = g_cursor.pos.y;
if (px < g_state.dstRect.x)
px = g_state.dstRect.x;
else if (px > g_state.dstRect.x + g_state.dstRect.w)
px = g_state.dstRect.x + g_state.dstRect.w;
if (py < g_state.dstRect.y)
py = g_state.dstRect.y;
else if (py > g_state.dstRect.y + g_state.dstRect.h)
py = g_state.dstRect.y + g_state.dstRect.h;
/* translate the guests position to our coordinate space */
struct DoublePoint local;
guestCurToLocal(&local);
double lx = (px - local.x) / g_cursor.dpiScale;
double ly = (py - local.y) / g_cursor.dpiScale;
int x, y;
cursorToInt(lx, ly, &x, &y);
g_cursor.guest.x += x;
g_cursor.guest.y += y;
if (!spice_mouse_motion(x, y))
DEBUG_ERROR("failed to send mouse motion message");
}
void app_updateWindowPos(int x, int y)
{
g_state.windowPos.x = x;
g_state.windowPos.y = y;
}
void app_handleResizeEvent(int w, int h)
{
SDL_GetWindowBordersSize(g_state.window,
&g_state.border.y,
&g_state.border.x,
&g_state.border.h,
&g_state.border.w
);
/* don't do anything else if the window dimensions have not changed */
if (g_state.windowW == w && g_state.windowH == h)
return;
g_state.windowW = w;
g_state.windowH = h;
g_state.windowCX = w / 2;
g_state.windowCY = h / 2;
updatePositionInfo();
if (app_inputEnabled())
{
/* if the window is moved/resized causing a loss of focus while grabbed, it
* makes it impossible to re-focus the window, so we quietly re-enter
* capture if we were already in it */
if (g_cursor.grab)
{
setGrabQuiet(false);
setGrabQuiet(true);
}
alignToGuest();
}
}
void app_handleWindowLeave(void)
{
g_cursor.inWindow = false;
setCursorInView(false);
if (!app_inputEnabled())
return;
if (!params.alwaysShowCursor)
g_cursor.draw = false;
g_cursor.redraw = true;
}
void app_handleWindowEnter(void)
{
g_cursor.inWindow = true;
if (!app_inputEnabled())
return;
g_cursor.realign = true;
}
static void setGrab(bool enable)
{
setGrabQuiet(enable);
app_alert(
g_cursor.grab ? LG_ALERT_SUCCESS : LG_ALERT_WARNING,
g_cursor.grab ? "Capture Enabled" : "Capture Disabled"
);
}
static void setGrabQuiet(bool enable)
{
/* we always do this so that at init the cursor is in the right state */
if (params.captureInputOnly && params.hideMouse)
SDL_ShowCursor(enable ? SDL_DISABLE : SDL_ENABLE);
if (g_cursor.grab == enable)
return;
g_cursor.grab = enable;
g_cursor.acc.x = 0.0;
g_cursor.acc.y = 0.0;
/* if the display server does not support warp we need to grab the pointer
* here instead of in the move handler */
bool warpSupport = true;
app_getProp(LG_DS_WARP_SUPPORT, &warpSupport);
if (enable)
{
setCursorInView(true);
g_state.ignoreInput = false;
if (params.grabKeyboard)
g_state.ds->grabKeyboard();
if (!warpSupport)
g_state.ds->grabPointer();
}
else
{
if (params.grabKeyboard)
{
if (!g_state.focused || !params.grabKeyboardOnFocus)
g_state.ds->ungrabKeyboard();
}
if (!warpSupport)
g_state.ds->ungrabPointer();
// if exiting capture when input on capture only, we want to show the cursor
if (params.captureInputOnly || !params.hideMouse)
alignToGuest();
}
}
int eventFilter(void * userdata, SDL_Event * event)
{
if (g_state.ds->eventFilter(event))
return 0;
// always include the default handler (SDL) for any unhandled events
if (g_state.ds != LG_DisplayServers[0])
if (LG_DisplayServers[0]->eventFilter(event))
return 0;
if (event->type == e_SDLEvent)
{
switch(event->user.code)
{
case LG_EVENT_ALIGN_TO_GUEST:
{
if (!g_cursor.guest.valid || !g_state.focused)
break;
struct DoublePoint local;
if (guestCurToLocal(&local))
if (warpPointer(round(local.x), round(local.y), false))
setCursorInView(true);
break;
}
}
return 0;
}
// consume all events
return 0;
}
void int_handler(int signal)
{
switch(signal)
{
case SIGINT:
case SIGTERM:
DEBUG_INFO("Caught signal, shutting down...");
g_state.state = APP_STATE_SHUTDOWN;
break;
}
}
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
g_state.lgrData = NULL;
if (!r->create(&g_state.lgrData, lgrParams))
return false;
// initialize the renderer
if (!r->initialize(g_state.lgrData, sdlFlags))
{
r->deinitialize(g_state.lgrData);
return false;
}
DEBUG_INFO("Using Renderer: %s", r->get_name());
return true;
}
static void toggle_fullscreen(uint32_t scancode, void * opaque)
{
SDL_SetWindowFullscreen(g_state.window, params.fullscreen ? 0 : SDL_WINDOW_FULLSCREEN_DESKTOP);
params.fullscreen = !params.fullscreen;
}
static void toggle_video(uint32_t scancode, void * opaque)
{
g_state.stopVideo = !g_state.stopVideo;
app_alert(
LG_ALERT_INFO,
g_state.stopVideo ? "Video Stream Disabled" : "Video Stream Enabled"
);
if (!g_state.stopVideo)
{
if (t_frame)
{
lgJoinThread(t_frame, NULL);
t_frame = NULL;
}
if (!lgCreateThread("frameThread", frameThread, NULL, &t_frame))
DEBUG_ERROR("frame create thread failed");
}
}
static void toggle_rotate(uint32_t scancode, void * opaque)
{
if (params.winRotate == LG_ROTATE_MAX-1)
params.winRotate = 0;
else
++params.winRotate;
updatePositionInfo();
}
static void toggle_input(uint32_t scancode, void * opaque)
{
g_state.ignoreInput = !g_state.ignoreInput;
if (g_state.ignoreInput)
setCursorInView(false);
app_alert(
LG_ALERT_INFO,
g_state.ignoreInput ? "Input Disabled" : "Input Enabled"
);
}
static void quit(uint32_t scancode, void * opaque)
{
g_state.state = APP_STATE_SHUTDOWN;
}
static void mouse_sens_inc(uint32_t scancode, void * opaque)
{
char * msg;
if (g_cursor.sens < 9)
++g_cursor.sens;
alloc_sprintf(&msg, "Sensitivity: %s%d", g_cursor.sens > 0 ? "+" : "", g_cursor.sens);
app_alert(
LG_ALERT_INFO,
msg
);
free(msg);
}
static void mouse_sens_dec(uint32_t scancode, void * opaque)
{
char * msg;
if (g_cursor.sens > -9)
--g_cursor.sens;
alloc_sprintf(&msg, "Sensitivity: %s%d", g_cursor.sens > 0 ? "+" : "", g_cursor.sens);
app_alert(
LG_ALERT_INFO,
msg
);
free(msg);
}
static void ctrl_alt_fn(uint32_t key, void * opaque)
{
const uint32_t ctrl = xfree86_to_ps2[KEY_LEFTCTRL];
const uint32_t alt = xfree86_to_ps2[KEY_LEFTALT ];
const uint32_t fn = xfree86_to_ps2[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 key_passthrough(uint32_t sc, void * opaque)
{
sc = xfree86_to_ps2[sc];
spice_key_down(sc);
spice_key_up (sc);
}
static void register_key_binds(void)
{
g_state.kbFS = app_register_keybind(KEY_F , toggle_fullscreen, NULL);
g_state.kbVideo = app_register_keybind(KEY_V , toggle_video , NULL);
g_state.kbRotate = app_register_keybind(KEY_R , toggle_rotate , NULL);
g_state.kbInput = app_register_keybind(KEY_I , toggle_input , NULL);
g_state.kbQuit = app_register_keybind(KEY_Q , quit , NULL);
g_state.kbMouseSensInc = app_register_keybind(KEY_INSERT, mouse_sens_inc , NULL);
g_state.kbMouseSensDec = app_register_keybind(KEY_DELETE, mouse_sens_dec , NULL);
g_state.kbCtrlAltFn[0 ] = app_register_keybind(KEY_F1 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[1 ] = app_register_keybind(KEY_F2 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[2 ] = app_register_keybind(KEY_F3 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[3 ] = app_register_keybind(KEY_F4 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[4 ] = app_register_keybind(KEY_F5 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[5 ] = app_register_keybind(KEY_F6 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[6 ] = app_register_keybind(KEY_F7 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[7 ] = app_register_keybind(KEY_F8 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[8 ] = app_register_keybind(KEY_F9 , ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[9 ] = app_register_keybind(KEY_F10, ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[10] = app_register_keybind(KEY_F11, ctrl_alt_fn, NULL);
g_state.kbCtrlAltFn[11] = app_register_keybind(KEY_F12, ctrl_alt_fn, NULL);
g_state.kbPass[0] = app_register_keybind(KEY_LEFTMETA , key_passthrough, NULL);
g_state.kbPass[1] = app_register_keybind(KEY_RIGHTMETA, key_passthrough, NULL);
}
static void release_key_binds(void)
{
app_release_keybind(&g_state.kbFS );
app_release_keybind(&g_state.kbVideo);
app_release_keybind(&g_state.kbInput);
app_release_keybind(&g_state.kbQuit );
app_release_keybind(&g_state.kbMouseSensInc);
app_release_keybind(&g_state.kbMouseSensDec);
for(int i = 0; i < 12; ++i)
app_release_keybind(&g_state.kbCtrlAltFn[i]);
for(int i = 0; i < 2; ++i)
app_release_keybind(&g_state.kbPass[i]);
}
static void initSDLCursor(void)
{
const uint8_t data[4] = {0xf, 0x9, 0x9, 0xf};
const uint8_t mask[4] = {0xf, 0xf, 0xf, 0xf};
cursor = SDL_CreateCursor(data, mask, 8, 4, 4, 0);
SDL_SetCursor(cursor);
}
static int lg_run(void)
{
memset(&g_state, 0, sizeof(g_state));
lgInit();
g_cursor.sens = params.mouseSens;
if (g_cursor.sens < -9) g_cursor.sens = -9;
else if (g_cursor.sens > 9) g_cursor.sens = 9;
// 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(warpPointer);
SET_FALLBACK(realignPointer);
SET_FALLBACK(inhibitIdle);
SET_FALLBACK(uninhibitIdle);
SET_FALLBACK(cbInit);
SET_FALLBACK(cbNotice);
SET_FALLBACK(cbRelease);
SET_FALLBACK(cbRequest);
#undef SET_FALLBACK
// init the subsystem
if (!g_state.ds->earlyInit())
{
DEBUG_ERROR("Subsystem early init failed");
return -1;
}
// Allow screensavers for now: we will enable and disable as needed.
SDL_SetHint(SDL_HINT_VIDEO_ALLOW_SCREENSAVER, "1");
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
if (!ivshmemOpen(&g_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(g_state.state != APP_STATE_SHUTDOWN && !spice_ready())
if (!spice_process(1000))
{
g_state.state = APP_STATE_SHUTDOWN;
DEBUG_ERROR("Failed to process spice messages");
return -1;
}
spice_mouse_mode(true);
if (!lgCreateThread("spiceThread", spiceThread, NULL, &t_spice))
{
DEBUG_ERROR("spice create thread failed");
return -1;
}
}
// select and init a renderer
LG_RendererParams lgrParams;
lgrParams.showFPS = params.showFPS;
lgrParams.quickSplash = params.quickSplash;
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;
}
g_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))
{
g_state.lgr = LG_Renderers[i];
break;
}
}
}
if (!g_state.lgr)
{
DEBUG_INFO("Unable to find a suitable renderer");
return -1;
}
// all our ducks are in a line, create the window
g_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.allowResize ? SDL_WINDOW_RESIZABLE : 0) |
(params.borderless ? SDL_WINDOW_BORDERLESS : 0) |
(params.maximize ? SDL_WINDOW_MAXIMIZED : 0) |
sdlFlags
)
);
if (g_state.window == NULL)
{
DEBUG_ERROR("Could not create an SDL window: %s\n", SDL_GetError());
return 1;
}
SDL_VERSION(&g_state.wminfo.version);
if (!SDL_GetWindowWMInfo(g_state.window, &g_state.wminfo))
{
DEBUG_ERROR("Could not get SDL window information %s", SDL_GetError());
return -1;
}
// enable WM events
SDL_EventState(SDL_SYSWMEVENT, SDL_ENABLE);
g_state.ds->init(&g_state.wminfo);
SDL_SetHint(SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS,
params.minimizeOnFocusLoss ? "1" : "0");
if (params.fullscreen)
SDL_SetWindowFullscreen(g_state.window, SDL_WINDOW_FULLSCREEN_DESKTOP);
if (!params.center)
SDL_SetWindowPosition(g_state.window, params.x, params.y);
if (!params.noScreensaver)
g_state.ds->inhibitIdle();
// ensure the initial window size is stored in the state
SDL_GetWindowSize(g_state.window, &g_state.windowW, &g_state.windowH);
// ensure renderer viewport is aware of the current window size
updatePositionInfo();
if (params.fpsMin <= 0)
{
// default 30 fps
g_state.frameTime = 1000000000ULL / 30ULL;
}
else
{
DEBUG_INFO("Using the FPS minimum from args: %d", params.fpsMin);
g_state.frameTime = 1000000000ULL / (unsigned long long)params.fpsMin;
}
// create our custom event
e_SDLEvent = SDL_RegisterEvents(1);
register_key_binds();
initSDLCursor();
if (params.hideMouse)
SDL_ShowCursor(SDL_DISABLE);
// setup the startup condition
if (!(e_startup = lgCreateEvent(false, 0)))
{
DEBUG_ERROR("failed to create the startup event");
return -1;
}
// setup the new frame event
if (!(e_frame = lgCreateEvent(true, 0)))
{
DEBUG_ERROR("failed to create the frame event");
return -1;
}
// start the renderThread so we don't just display junk
if (!lgCreateThread("renderThread", renderThread, NULL, &t_render))
{
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);
// wait for startup to complete so that any error messages below are output at
// the end of the output
lgWaitEvent(e_startup, TIMEOUT_INFINITE);
g_state.ds->startup();
g_state.cbAvailable = g_state.ds->cbInit && g_state.ds->cbInit();
if (g_state.cbAvailable)
g_state.cbRequestList = ll_new();
LGMP_STATUS status;
while(g_state.state == APP_STATE_RUNNING)
{
if ((status = lgmpClientInit(g_state.shm.mem, g_state.shm.size, &g_state.lgmp)) == LGMP_OK)
break;
DEBUG_ERROR("lgmpClientInit Failed: %s", lgmpStatusString(status));
return -1;
}
/* this short timeout is to allow the LGMP host to update the timestamp before
* we start checking for a valid session */
SDL_WaitEventTimeout(NULL, 200);
if (params.captureOnStart)
setGrab(true);
uint32_t udataSize;
KVMFR *udata;
int waitCount = 0;
restart:
while(g_state.state == APP_STATE_RUNNING)
{
if ((status = lgmpClientSessionInit(g_state.lgmp, &udataSize, (uint8_t **)&udata)) == LGMP_OK)
break;
if (status != LGMP_ERR_INVALID_SESSION && status != LGMP_ERR_INVALID_MAGIC)
{
DEBUG_ERROR("lgmpClientSessionInit Failed: %s", lgmpStatusString(status));
return -1;
}
if (waitCount++ == 0)
{
DEBUG_BREAK();
DEBUG_INFO("The host application seems to not be running");
DEBUG_INFO("Waiting for the host application to start...");
}
if (waitCount == 30)
{
DEBUG_BREAK();
DEBUG_INFO("Please check the host application is running and is the correct version");
DEBUG_INFO("Check the host log in your guest at %%TEMP%%\\looking-glass-host.txt");
DEBUG_INFO("Continuing to wait...");
}
SDL_WaitEventTimeout(NULL, 1000);
}
if (g_state.state != APP_STATE_RUNNING)
return -1;
// dont show warnings again after the first startup
waitCount = 100;
const bool magicMatches = memcmp(udata->magic, KVMFR_MAGIC, sizeof(udata->magic)) == 0;
if (udataSize != sizeof(KVMFR) || !magicMatches || udata->version != KVMFR_VERSION)
{
DEBUG_BREAK();
DEBUG_ERROR("The host application is not compatible with this client");
DEBUG_ERROR("This is not a Looking Glass error, do not report this");
DEBUG_ERROR("Please install the matching host application for this client");
if (magicMatches)
{
DEBUG_ERROR("Expected KVMFR version %d, got %d", KVMFR_VERSION, udata->version);
DEBUG_ERROR("Client version: %s", BUILD_VERSION);
if (udata->version >= 2)
DEBUG_ERROR(" Host version: %s", udata->hostver);
}
else
DEBUG_ERROR("Invalid KVMFR magic");
DEBUG_BREAK();
if (magicMatches)
{
DEBUG_INFO("Waiting for you to upgrade the host application");
while (g_state.state == APP_STATE_RUNNING && udata->version != KVMFR_VERSION)
SDL_WaitEventTimeout(NULL, 1000);
if (g_state.state != APP_STATE_RUNNING)
return -1;
goto restart;
}
else
return -1;
}
DEBUG_INFO("Host ready, reported version: %s", udata->hostver);
DEBUG_INFO("Starting session");
if (!lgCreateThread("cursorThread", cursorThread, NULL, &t_cursor))
{
DEBUG_ERROR("cursor create thread failed");
return 1;
}
if (!lgCreateThread("frameThread", frameThread, NULL, &t_frame))
{
DEBUG_ERROR("frame create thread failed");
return -1;
}
while(g_state.state == APP_STATE_RUNNING)
{
if (!lgmpClientSessionValid(g_state.lgmp))
{
g_state.state = APP_STATE_RESTART;
break;
}
SDL_WaitEventTimeout(NULL, 100);
}
if (g_state.state == APP_STATE_RESTART)
{
lgSignalEvent(e_startup);
lgSignalEvent(e_frame);
lgJoinThread(t_frame , NULL);
lgJoinThread(t_cursor, NULL);
t_frame = NULL;
t_cursor = NULL;
lgInit();
g_state.lgr->on_restart(g_state.lgrData);
DEBUG_INFO("Waiting for the host to restart...");
goto restart;
}
return 0;
}
static void lg_shutdown(void)
{
g_state.state = APP_STATE_SHUTDOWN;
if (t_render)
{
lgSignalEvent(e_startup);
lgSignalEvent(e_frame);
lgJoinThread(t_render, NULL);
}
lgmpClientFree(&g_state.lgmp);
if (e_frame)
{
lgFreeEvent(e_frame);
e_frame = NULL;
}
if (e_startup)
{
lgFreeEvent(e_startup);
e_startup = NULL;
}
// if spice is still connected send key up events for any pressed keys
if (params.useSpiceInput && spice_ready())
{
for(uint32_t scancode = 0; scancode < KEY_MAX; ++scancode)
if (g_state.keyDown[scancode])
{
g_state.keyDown[scancode] = false;
spice_key_up(scancode);
}
spice_disconnect();
if (t_spice)
lgJoinThread(t_spice, NULL);
}
if (g_state.ds)
g_state.ds->shutdown();
if (g_state.cbRequestList)
{
ll_free(g_state.cbRequestList);
g_state.cbRequestList = NULL;
}
if (g_state.window)
{
g_state.ds->free();
SDL_DestroyWindow(g_state.window);
}
if (cursor)
SDL_FreeCursor(cursor);
ivshmemClose(&g_state.shm);
release_key_binds();
SDL_Quit();
}
int main(int argc, char * argv[])
{
if (getuid() == 0)
{
DEBUG_ERROR("Do not run looking glass as root!");
return -1;
}
DEBUG_INFO("Looking Glass (%s)", BUILD_VERSION);
DEBUG_INFO("Locking Method: " LG_LOCK_MODE);
if (!installCrashHandler("/proc/self/exe"))
DEBUG_WARN("Failed to install the crash handler");
config_init();
ivshmemOptionsInit();
// 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;
const int ret = lg_run();
lg_shutdown();
config_free();
return ret;
}
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