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looking-glass/client/main.c
Geoffrey McRae 7349334811 [client] reworked polling logic and added GPU magic 
SDL_RenderPresent calls SwapBuffers which doesn't block even with vsync
enabled until the driver/gpu has buffered several frames, this is no good
for our use case where low latency is of ultimate importance. This patch
measures the swap interval, ensures the time is consumed and then calls
glFinish to ensure that there is no buffered data. The results on NVidia
hardware are exceptional, but will need verification on AMD hardware.

Polling logic has also been improved, the client will hunt for the best
delay rather then resorting to waiting on an event from the guest, avoiding
scheduler latency caused by waiting on the irq event.
2017-12-12 03:59:57 +11:00

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/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017 Geoffrey McRae <geoff@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 <getopt.h>
#include <SDL2/SDL.h>
#include <SDL_ttf.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <assert.h>
#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glu.h>
#include "debug.h"
#include "memcpySSE.h"
#include "KVMFR.h"
#include "ivshmem/ivshmem.h"
#include "spice/spice.h"
#include "kb.h"
#include "lg-renderers.h"
#define VBO_BUFFERS 2
struct AppState
{
bool hasBufferStorage;
bool running;
bool started;
TTF_Font *font;
SDL_Rect srcRect;
LG_RendererRect dstRect;
float scaleX, scaleY;
SDL_Window * window;
SDL_Renderer * renderer;
struct KVMFRHeader * shm;
unsigned int shmSize;
};
struct AppParams
{
bool vsync;
bool autoResize;
bool allowResize;
bool keepAspect;
bool borderless;
bool center;
int x, y;
unsigned int w, h;
const char * ivshmemSocket;
bool useBufferStorage;
bool useMipmap;
bool showFPS;
bool useSpice;
const char * spiceHost;
unsigned int spicePort;
bool scaleMouseInput;
bool hideMouse;
};
struct AppState state;
struct AppParams params =
{
.vsync = true,
.autoResize = false,
.allowResize = true,
.keepAspect = true,
.borderless = false,
.center = true,
.x = 0,
.y = 0,
.w = 1024,
.h = 768,
.ivshmemSocket = "/tmp/ivshmem_socket",
.useBufferStorage = true,
.useMipmap = true,
.showFPS = false,
.useSpice = true,
.spiceHost = "127.0.0.1",
.spicePort = 5900,
.scaleMouseInput = true,
.hideMouse = true
};
inline void updatePositionInfo()
{
int w, h;
SDL_GetRendererOutputSize(state.renderer, &w, &h);
if (params.keepAspect)
{
const float srcAspect = (float)state.srcRect.h / (float)state.srcRect.w;
const float wndAspect = (float)h / (float)w;
if (wndAspect < srcAspect)
{
state.dstRect.w = (float)h / srcAspect;
state.dstRect.h = h;
state.dstRect.x = (w >> 1) - (state.dstRect.w >> 1);
state.dstRect.y = 0;
}
else
{
state.dstRect.w = w;
state.dstRect.h = (float)w * srcAspect;
state.dstRect.x = 0;
state.dstRect.y = (h >> 1) - (state.dstRect.h >> 1);
}
}
else
{
state.dstRect.x = 0;
state.dstRect.y = 0;
state.dstRect.w = w;
state.dstRect.h = h;
}
state.scaleX = (float)state.srcRect.h / (float)state.dstRect.h;
state.scaleY = (float)state.srcRect.w / (float)state.dstRect.w;
}
inline bool areFormatsSame(const struct KVMFRHeader s1, const struct KVMFRHeader s2)
{
return
(s1.frameType != FRAME_TYPE_INVALID) &&
(s2.frameType != FRAME_TYPE_INVALID) &&
(s1.version == s2.version ) &&
(s1.frameType == s2.frameType) &&
(s1.width == s2.width ) &&
(s1.height == s2.height );
}
inline uint64_t microtime()
{
struct timeval time;
gettimeofday(&time, NULL);
return ((uint64_t)time.tv_sec * 1000000) + time.tv_usec;
}
uint64_t detectPresentTime()
{
// warm up first as the GPU driver may have multiple buffers
for(int i = 0; i < 10; ++i)
SDL_RenderPresent(state.renderer);
// time 10 iterations and compute the average
const uint64_t start = microtime();
for(int i = 0; i < 10; ++i)
SDL_RenderPresent(state.renderer);
const uint64_t t = (microtime() - start) / 10;
// ensure all buffers are flushed
glFinish();
DEBUG_INFO("detected: %lu (%f Hz)", t, 1000000.0f / t);
return t;
}
int renderThread(void * unused)
{
bool error = false;
struct KVMFRHeader header;
const LG_Renderer * lgr = NULL;
void * lgrData;
unsigned int frameCount = 0;
SDL_Texture * textTexture = NULL;
SDL_Rect textRect;
const uint64_t presentTime = detectPresentTime();
uint64_t pollDelay = 0;
uint64_t pollStep = 0;
uint64_t drawStart = 0;
uint64_t drawTime = 0;
uint64_t fpsStart = 0;
uint64_t fpsTime = 0;
while(state.running)
{
DEBUG_INFO("delay: %lu", pollDelay);
usleep(pollDelay);
if(header.dataPos == state.shm->dataPos)
{
pollStep = 0;
do
{
++pollStep;
if (pollDelay + pollStep < 30000)
pollDelay += pollStep;
usleep(1);
}
while(header.dataPos == state.shm->dataPos && state.running);
if (!state.running)
break;
}
else
{
// we were late, step back a chunk
pollStep += 100;
if (pollDelay > pollStep)
pollDelay -= pollStep;
}
if (!state.running)
break;
// sleep for the remainder of the presentation time
if (frameCount > 0)
{
drawTime = microtime() - drawStart;
if (drawTime < presentTime)
{
uint64_t delta = presentTime - drawTime;
if (delta > 1000)
usleep(delta - 1000);
}
// ensure buffers are flushed
glFinish();
}
drawStart = microtime();
// we must take a copy of the header, both to let the guest advance and to
// prevent the contained arguments being abused to overflow buffers
memcpy(&header, state.shm, sizeof(struct KVMFRHeader));
ivshmem_kick_irq(header.guestID, 0);
// check the header's magic and version are valid
if (
memcmp(header.magic, KVMFR_HEADER_MAGIC, sizeof(KVMFR_HEADER_MAGIC)) != 0 ||
header.version != KVMFR_HEADER_VERSION
)
{
usleep(1000);
continue;
}
// setup the renderer format with the frame format details
LG_RendererFormat lgrFormat;
lgrFormat.width = header.width;
lgrFormat.height = header.height;
lgrFormat.stride = header.stride;
switch(header.frameType)
{
case FRAME_TYPE_ARGB:
lgrFormat.pitch = header.stride * 4;
lgrFormat.bpp = 32;
break;
case FRAME_TYPE_RGB:
lgrFormat.pitch = header.stride * 3;
lgrFormat.bpp = 24;
break;
default:
DEBUG_ERROR("Unsupported frameType");
error = true;
break;
}
if (error)
break;
// check the header's dataPos is sane
const size_t dataSize = lgrFormat.height * lgrFormat.pitch;
if (header.dataPos + dataSize > state.shmSize)
{
DEBUG_ERROR("The guest sent an invalid dataPos");
break;
}
// check if we have a compatible renderer
if (!lgr || !lgr->is_compatible(lgrData, lgrFormat))
{
LG_RendererParams lgrParams;
lgrParams.window = state.window;
lgrParams.renderer = state.renderer;
DEBUG_INFO("Data Format: w=%u, h=%u, s=%u, p=%u, bpp=%u",
lgrFormat.width, lgrFormat.height, lgrFormat.stride, lgrFormat.pitch, lgrFormat.bpp);
// first try to reinitialize any existing renderer
if (lgr)
{
lgr->deinitialize(lgrData);
if (lgr->initialize(&lgrData, lgrParams, lgrFormat))
{
DEBUG_INFO("Reinitialized %s", lgr->get_name());
}
else
{
DEBUG_ERROR("Failed to reinitialize %s, trying other renderers", lgr->get_name());
lgr->deinitialize(lgrData);
lgr = NULL;
}
}
if (!lgr)
{
// probe for a a suitable renderer
for(const LG_Renderer **r = &LG_Renderers[0]; *r; ++r)
{
if (!IS_LG_RENDERER_VALID(*r))
{
DEBUG_ERROR("FIXME: Renderer %d is invalid, skpping", (int)(r - &LG_Renderers[0]));
continue;
}
lgrData = NULL;
if (!(*r)->initialize(&lgrData, lgrParams, lgrFormat))
{
(*r)->deinitialize(lgrData);
continue;
}
lgr = *r;
DEBUG_INFO("Initialized %s", (*r)->get_name());
break;
}
if (!lgr)
{
DEBUG_INFO("Unable to find a suitable renderer");
return -1;
}
}
state.srcRect.x = 0;
state.srcRect.y = 0;
state.srcRect.w = header.width;
state.srcRect.h = header.height;
updatePositionInfo();
}
if (!lgr->render(
lgrData,
state.dstRect,
(uint8_t *)state.shm + header.dataPos,
params.useMipmap
))
{
DEBUG_ERROR("Failed to render the frame");
break;
}
if (params.showFPS)
{
// for now render the frame counter here, we really should
// move this into the renderers though.
if (fpsTime > 1000000)
{
SDL_Surface *textSurface = NULL;
if (textTexture)
{
SDL_DestroyTexture(textTexture);
textTexture = NULL;
}
char str[32];
const float avgFPS = 1000.0f / (((float)fpsTime / frameCount) / 1000.0f);
snprintf(str, sizeof(str), "FPS: %8.4f", avgFPS);
SDL_Color color = {0xff, 0xff, 0xff};
if (!(textSurface = TTF_RenderText_Blended(state.font, str, color)))
{
DEBUG_ERROR("Failed to render text");
break;
}
textRect.x = 5;
textRect.y = 5;
textRect.w = textSurface->w;
textRect.h = textSurface->h;
textTexture = SDL_CreateTextureFromSurface(state.renderer, textSurface);
SDL_SetTextureBlendMode(textTexture, SDL_BLENDMODE_BLEND);
SDL_FreeSurface(textSurface);
fpsTime = 0;
frameCount = 0;
}
if (textTexture)
{
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4f(0.0f, 0.0f, 1.0f, 0.5f);
glBegin(GL_TRIANGLE_STRIP);
glVertex2i(textRect.x , textRect.y );
glVertex2i(textRect.x + textRect.w, textRect.y );
glVertex2i(textRect.x , textRect.y + textRect.h);
glVertex2i(textRect.x + textRect.w, textRect.y + textRect.h);
glEnd();
float tw, th;
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
SDL_GL_BindTexture(textTexture, &tw, &th);
glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(0.0f, 0.0f); glVertex2i(textRect.x , textRect.y );
glTexCoord2f(tw , 0.0f); glVertex2i(textRect.x + textRect.w, textRect.y );
glTexCoord2f(0.0f, th ); glVertex2i(textRect.x , textRect.y + textRect.h);
glTexCoord2f(tw , th ); glVertex2i(textRect.x + textRect.w, textRect.y + textRect.h);
glEnd();
glDisable(GL_BLEND);
SDL_GL_UnbindTexture(textTexture);
}
}
SDL_RenderPresent(state.renderer);
++frameCount;
uint64_t t = microtime();
fpsTime += t - fpsStart;
fpsStart = t;
}
if (lgr)
lgr->deinitialize(lgrData);
return 0;
}
int ivshmemThread(void * arg)
{
while(state.running)
if (!ivshmem_process())
{
if (state.running)
{
state.running = false;
DEBUG_ERROR("failed to process ivshmem messages");
}
break;
}
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;
}
spice_disconnect();
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;
}
int eventThread(void * arg)
{
bool serverMode = false;
bool realignGuest = true;
bool keyDown[SDL_NUM_SCANCODES];
memset(keyDown, 0, sizeof(keyDown));
// ensure mouse acceleration is identical in server mode
SDL_SetHintWithPriority(SDL_HINT_MOUSE_RELATIVE_MODE_WARP, "1", SDL_HINT_OVERRIDE);
while(state.running)
{
SDL_Event event;
if (!SDL_PollEvent(&event))
{
usleep(1000);
continue;
}
if (event.type == SDL_QUIT)
{
state.running = false;
break;
}
if (!params.useSpice)
continue;
switch(event.type)
{
case SDL_KEYDOWN:
{
SDL_Scancode sc = event.key.keysym.scancode;
if (sc == SDL_SCANCODE_SCROLLLOCK)
{
if (event.key.repeat)
break;
serverMode = !serverMode;
spice_mouse_mode(serverMode);
SDL_SetRelativeMouseMode(serverMode);
if (!serverMode)
realignGuest = true;
break;
}
uint32_t scancode = mapScancode(sc);
if (scancode == 0)
break;
if (spice_key_down(scancode))
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 (sc == SDL_SCANCODE_SCROLLLOCK)
break;
// avoid sending key up events when we didn't send a down
if (!keyDown[sc])
break;
uint32_t scancode = mapScancode(sc);
if (scancode == 0)
break;
if (spice_key_up(scancode))
keyDown[sc] = false;
else
{
DEBUG_ERROR("SDL_KEYUP: failed to send message");
break;
}
break;
}
case SDL_MOUSEWHEEL:
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_MOUSEMOTION:
{
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)
{
x = event.motion.x - state.dstRect.x;
y = event.motion.y - state.dstRect.y;
if (params.scaleMouseInput)
{
x = (float)x * state.scaleX;
y = (float)y * state.scaleY;
}
x -= state.shm->mouseX;
y -= state.shm->mouseY;
realignGuest = false;
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)
{
x = (float)x * state.scaleX;
y = (float)y * state.scaleY;
}
if (!spice_mouse_motion(x, y))
{
DEBUG_ERROR("SDL_MOUSEMOTION: failed to send message");
break;
}
}
break;
}
case SDL_MOUSEBUTTONDOWN:
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 (
!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;
case SDL_WINDOWEVENT:
{
switch(event.window.event)
{
case SDL_WINDOWEVENT_ENTER:
realignGuest = true;
break;
case SDL_WINDOWEVENT_SIZE_CHANGED:
updatePositionInfo();
realignGuest = true;
break;
}
break;
}
default:
break;
}
}
return 0;
}
int run()
{
memset(&state, 0, sizeof(state));
state.running = true;
state.scaleX = 1.0f;
state.scaleY = 1.0f;
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
DEBUG_ERROR("SDL_Init Failed");
return -1;
}
if (params.showFPS)
{
if (TTF_Init() < 0)
{
DEBUG_ERROR("TTL_Init Failed");
return -1;
}
state.font = TTF_OpenFont("/usr/share/fonts/truetype/freefont/FreeMono.ttf", 16);
if (!state.font)
{
DEBUG_ERROR("TTL_OpenFont Failed");
return -1;
}
}
state.window = SDL_CreateWindow(
"Looking Glass (Client)",
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)
)
);
if (!state.window)
{
DEBUG_ERROR("failed to create window");
return -1;
}
SDL_Cursor *cursor = NULL;
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);
}
state.renderer = SDL_CreateRenderer(state.window, -1,
SDL_RENDERER_ACCELERATED |
(params.vsync ? SDL_RENDERER_PRESENTVSYNC : 0)
);
if (!state.renderer)
{
DEBUG_ERROR("failed to create renderer");
return -1;
}
SDL_GL_SetSwapInterval(params.vsync ? 1 : 0);
if (params.useBufferStorage)
{
const GLubyte * extensions = glGetString(GL_EXTENSIONS);
if (gluCheckExtension((const GLubyte *)"GL_ARB_buffer_storage", extensions))
{
DEBUG_INFO("Using GL_ARB_buffer_storage");
state.hasBufferStorage = true;
}
}
int shm_fd = 0;
SDL_Thread *t_ivshmem = NULL;
SDL_Thread *t_spice = NULL;
SDL_Thread *t_event = NULL;
while(1)
{
if (!ivshmem_connect(params.ivshmemSocket))
{
DEBUG_ERROR("failed to connect to the ivshmem server");
break;
}
if (!(t_ivshmem = SDL_CreateThread(ivshmemThread, "ivshmemThread", NULL)))
{
DEBUG_ERROR("ivshmem create thread failed");
break;
}
state.shm = (struct KVMFRHeader *)ivshmem_get_map();
if (!state.shm)
{
DEBUG_ERROR("Failed to map memory");
break;
}
state.shmSize = ivshmem_get_map_size();
state.shm->hostID = ivshmem_get_id();
if (params.useSpice)
{
if (!spice_connect(params.spiceHost, params.spicePort, ""))
{
DEBUG_ERROR("Failed to connect to spice server");
return 0;
}
while(state.running && !spice_ready())
if (!spice_process())
{
state.running = false;
DEBUG_ERROR("Failed to process spice messages");
break;
}
if (!(t_spice = SDL_CreateThread(spiceThread, "spiceThread", NULL)))
{
DEBUG_ERROR("spice create thread failed");
break;
}
}
if (!(t_event = SDL_CreateThread(eventThread, "eventThread", NULL)))
{
DEBUG_ERROR("gpu create thread failed");
break;
}
while(state.running)
renderThread(NULL);
break;
}
state.running = false;
if (t_event)
SDL_WaitThread(t_event, NULL);
// this needs to happen here to abort any waiting reads
// as ivshmem uses recvmsg which has no timeout
ivshmem_disconnect();
if (t_ivshmem)
SDL_WaitThread(t_ivshmem, NULL);
if (t_spice)
SDL_WaitThread(t_spice, NULL);
if (state.renderer)
SDL_DestroyRenderer(state.renderer);
if (state.window)
SDL_DestroyWindow(state.window);
if (cursor)
SDL_FreeCursor(cursor);
if (shm_fd)
close(shm_fd);
TTF_Quit();
SDL_Quit();
return 0;
}
void doHelp(char * app)
{
char x[8], y[8];
snprintf(x, sizeof(x), "%d", params.x);
snprintf(y, sizeof(y), "%d", params.y);
fprintf(stderr,
"Looking Glass Client\n"
"Usage: %s [OPTION]...\n"
"Example: %s -h\n"
"\n"
" -h Print out this help\n"
"\n"
" -f PATH Specify the path to the ivshmem socket [current: %s]\n"
"\n"
" -s Disable spice client\n"
" -c HOST Specify the spice host [current: %s]\n"
" -p PORT Specify the spice port [current: %d]\n"
" -j Disable cursor position scaling\n"
" -M Don't hide the host cursor\n"
"\n"
" -g Disable OpenGL 4.3 Buffer Storage (GL_ARB_buffer_storage)\n"
" -m Disable mipmapping\n"
" -v Disable VSync\n"
" -k Enable FPS display\n"
"\n"
" -a Auto resize the window to the guest\n"
" -n Don't allow the window to be manually resized\n"
" -r Don't maintain the aspect ratio\n"
" -d Borderless mode\n"
" -x XPOS Initial window X position [current: %s]\n"
" -y YPOS Initial window Y position [current: %s]\n"
" -w WIDTH Initial window width [current: %u]\n"
" -b HEIGHT Initial window height [current: %u]\n"
"\n"
" -l License information\n"
"\n",
app,
app,
params.ivshmemSocket,
params.spiceHost,
params.spicePort,
params.center ? "center" : x,
params.center ? "center" : y,
params.w,
params.h
);
}
void doLicense()
{
fprintf(stderr,
"\n"
"Looking Glass - KVM FrameRelay (KVMFR) Client\n"
"Copyright(C) 2017 Geoffrey McRae <geoff@hostfission.com>\n"
"\n"
"This program is free software; you can redistribute it and / or modify it under\n"
"the terms of the GNU General Public License as published by the Free Software\n"
"Foundation; either version 2 of the License, or (at your option) any later\n"
"version.\n"
"\n"
"This program is distributed in the hope that it will be useful, but WITHOUT ANY\n"
"WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A\n"
"PARTICULAR PURPOSE.See the GNU General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU General Public License along with\n"
"this program; if not, write to the Free Software Foundation, Inc., 59 Temple\n"
"Place, Suite 330, Boston, MA 02111 - 1307 USA\n"
"\n"
);
}
int main(int argc, char * argv[])
{
int c;
while((c = getopt(argc, argv, "hf:sc:p:jMgmvkanrdx:y:w:b:l")) != -1)
switch(c)
{
case '?':
case 'h':
default :
doHelp(argv[0]);
return (c == 'h') ? 0 : -1;
case 'f':
params.ivshmemSocket = optarg;
break;
case 's':
params.useSpice = false;
break;
case 'c':
params.spiceHost = optarg;
break;
case 'p':
params.spicePort = atoi(optarg);
break;
case 'j':
params.scaleMouseInput = false;
break;
case 'M':
params.hideMouse = false;
break;
case 'g':
params.useBufferStorage = false;
break;
case 'm':
params.useMipmap = false;
break;
case 'v':
params.vsync = false;
break;
case 'k':
params.showFPS = true;
break;
case 'a':
params.autoResize = true;
break;
case 'n':
params.allowResize = false;
break;
case 'r':
params.keepAspect = false;
break;
case 'd':
params.borderless = true;
break;
case 'x':
params.center = false;
params.x = atoi(optarg);
break;
case 'y':
params.center = false;
params.y = atoi(optarg);
break;
case 'w':
params.w = atoi(optarg);
break;
case 'b':
params.h = atoi(optarg);
break;
case 'l':
doLicense();
return 0;
}
return run();
}
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