/* initialize controller */
struct nvstusb_context *
nvstusb_init(void)
{
/* initialize usb */
if (!nvstusb_usb_init()) return 0;
/* open device */
struct nvstusb_usb_device *dev = nvstusb_usb_open_device("nvstusb.fw");
if (0 == dev) return 0;
/* allocate context */
struct nvstusb_context *ctx = malloc(sizeof(*ctx));
if (0 == ctx) {
fprintf(stderr, "nvstusb: Could not allocate %d bytes for nvstusb_context...\n", (int)sizeof(*ctx));
nvstusb_usb_close_device(dev);
nvstusb_usb_deinit();
return 0;
}
ctx->rate = 0.0;
ctx->eye = 0;
ctx->device = dev;
ctx->vblank_method = 0;
ctx->toggled3D = 0;
ctx->invert_eyes = 0;
ctx->b_thread_running = 0;
return ctx;
}
/* initialize controller */
struct nvstusb_context *
nvstusb_init(void)
{
/* initialize usb */
if (!nvstusb_usb_init()) return 0;
/* open device */
struct nvstusb_usb_device *dev = nvstusb_usb_open_device("nvstusb.fw");
if (0 == dev) return 0;
/* allocate context */
struct nvstusb_context *ctx = malloc(sizeof(*ctx));
if (0 == ctx) {
fprintf(stderr, "nvstusb: Could not allocate %d bytes for nvstusb_context...\n", (int)sizeof(*ctx));
nvstusb_usb_close_device(dev);
nvstusb_usb_deinit();
return 0;
}
ctx->rate = 0.0;
ctx->eye = 0;
ctx->device = dev;
ctx->vblank_method = 0;
ctx->toggled3D = 0;
ctx->invert_eyes = 0;
ctx->b_thread_running = 0;
/* Vblank init */
/* NVIDIA VBlank syncing environment variable defined, signal it and disable
* any attempt to application side method */
if (getenv ("__GL_SYNC_TO_VBLANK"))
{
fprintf (stderr, "__GL_SYNC_TO_VBLANK defined in environment\n");
ctx->vblank_method = 2;
goto out_err;
}
/* Swap interval */
glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddress("glXSwapIntervalSGI");
if (NULL != glXSwapIntervalSGI) {
fprintf(stderr, "nvstusb: forcing vsync\n");
ctx->vblank_method = 3;
}
/* Sync Video */
glXGetVideoSyncSGI = (PFNGLXGETVIDEOSYNCSGIPROC)glXGetProcAddress("glXGetVideoSyncSGI");
glXWaitVideoSyncSGI = (PFNGLXWAITVIDEOSYNCSGIPROC)glXGetProcAddress("glXWaitVideoSyncSGI");
if (NULL == glXWaitVideoSyncSGI) {
glXGetVideoSyncSGI = 0;
} else {
ctx->vblank_method = 1;
}
if (NULL != glXGetVideoSyncSGI ) {
fprintf(stderr, "nvstusb: GLX_SGI_video_sync supported!\n");
}
fprintf(stderr, "nvstusb:selected vblank method: %d\n", ctx->vblank_method);
out_err:
return ctx;
}