/** \brief Free a \e libcaca canvas.
*
* Free all resources allocated by caca_create_canvas(). The canvas
* pointer becomes invalid and must no longer be used unless a new call
* to caca_create_canvas() is made.
*
* If an error occurs, -1 is returned and \b errno is set accordingly:
* - \c EBUSY The canvas is in use by a display driver and cannot be freed.
*
* \param cv A libcaca canvas.
* \return 0 in case of success, -1 if an error occurred.
*/
int caca_free_canvas(caca_canvas_t *cv)
{
int f;
if(cv->refcount)
{
seterrno(EBUSY);
return -1;
}
for(f = 0; f < cv->framecount; f++)
{
free(cv->frames[f].chars);
free(cv->frames[f].attrs);
free(cv->frames[f].name);
}
caca_canvas_set_figfont(cv, NULL);
free(cv->frames);
free(cv);
return 0;
}
int main(int argc, char *argv[]) {
caca_canvas_t *cv;
caca_canvas_t *figcv;
caca_display_t *dp;
uint32_t w, h, fw, fh;
char *format = "%R:%S";
char *font = "/usr/share/figlet/mono12.tlf";
for(;;)
{
int option_index = 0;
static struct caca_option long_options[] =
{
{ "font", 1, NULL, 'f' },
{ "dateformat", 1, NULL, 'd' },
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'v' },
};
int c = caca_getopt(argc, argv, "f:d:hv",
long_options, &option_index);
if(c == -1)
break;
switch(c)
{
case 'h': /* --help */
usage(argc, argv);
return 0;
break;
case 'v': /* --version */
version();
return 0;
break;
case 'f': /* --font */
font = caca_optarg;
break;
case 'd': /* --dateformat */
format = caca_optarg;
break;
default:
return 1;
break;
}
}
cv = caca_create_canvas(0, 0);
figcv = caca_create_canvas(0, 0);
if(!cv || !figcv)
{
fprintf(stderr, "%s: unable to initialise libcaca\n", argv[0]);
return 1;
}
if(caca_canvas_set_figfont(figcv, font))
{
fprintf(stderr, "Could not open font\n");
return -1;
}
dp = caca_create_display(cv);
if(!dp) {
printf("Can't open window. CACA_DRIVER problem ?\n");
return -1;
}
caca_set_color_ansi(figcv, CACA_DEFAULT, CACA_DEFAULT);
caca_clear_canvas(cv);
for(;;) {
caca_event_t ev;
while(caca_get_event(dp, CACA_EVENT_KEY_PRESS
| CACA_EVENT_QUIT, &ev, 1))
{
if(caca_get_event_type(&ev))
goto end;
}
char *d = get_date(format);
uint32_t o = 0;
// figfont API is not complete, and does not allow us to put a string
// at another position than 0,0
// So, we have to create a canvas which will hold the figfont string,
// then blit this canvas to the main one at the desired position.
caca_clear_canvas(cv);
caca_clear_canvas(figcv);
while(d[o])
{
caca_put_figchar(figcv, d[o++]);
}
caca_flush_figlet (figcv);
free(d);
w = caca_get_canvas_width (cv);
h = caca_get_canvas_height(cv);
fw = caca_get_canvas_width (figcv);
fh = caca_get_canvas_height(figcv);
uint32_t x = (w/2) - (fw/2);
uint32_t y = (h/2) - (fh/2);
caca_blit(cv, x, y, figcv, NULL);
caca_refresh_display(dp);
usleep(250000);
}
end:
caca_free_canvas(figcv);
caca_free_canvas(cv);
caca_free_display(dp);
return 0;
}