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#include <cairo-script.h>
#include <cairo-script-interpreter.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <setjmp.h>
#include <time.h>
static jmp_buf jmp;
static time_t timeout;
static cairo_format_t
format_from_content (cairo_content_t content)
{
switch (content) {
case CAIRO_CONTENT_ALPHA: return CAIRO_FORMAT_A8;
case CAIRO_CONTENT_COLOR: return CAIRO_FORMAT_RGB24;
default:
case CAIRO_CONTENT_COLOR_ALPHA: return CAIRO_FORMAT_ARGB32;
}
}
static cairo_surface_t *
_script_surface_create (void *closure,
cairo_content_t content,
double width, double height,
long uid)
{
cairo_surface_t *surface, *image;
cairo_rectangle_t extents;
/* use a image target so that we can use this surface as a source */
image = cairo_image_surface_create (format_from_content (content),
ceil (width), ceil (height));
surface = cairo_script_surface_create_for_target (closure, image);
cairo_surface_destroy (image);
return surface;
}
static cairo_t *
_script_context_create (void *closure,
cairo_surface_t *surface)
{
if (timeout && time (NULL) > timeout)
longjmp (jmp, 1);
return cairo_create (surface);
}
static cairo_status_t
write (void *closure, const unsigned char *data, unsigned int length)
{
if (fwrite (data, length, 1, closure) != 1)
return CAIRO_STATUS_WRITE_ERROR;
return CAIRO_STATUS_SUCCESS;
}
int
main (int argc, char **argv)
{
const cairo_script_interpreter_hooks_t hooks = {
.closure = cairo_script_create_for_stream (write, stdout),
.surface_create = _script_surface_create,
.context_create = _script_context_create,
};
cairo_script_interpreter_t *csi;
int i;
for (i = 1; i < argc; i++) {
if (strcmp (argv[i], "--trim") == 0) {
timeout = atoi (argv[i+1]);
i++;
} else if (strncmp (argv[i], "--trim=", 7) == 0) {
timeout = atoi (argv[i] + 7);
} else if (strcmp (argv[i], "--version")) {
printf ("%s: version %s\n", argv[0], __DATE__);
exit (0);
} else if (strcmp (argv[i], "--help")) {
printf ("usage: %s [--trim=max.seconds] < in > out\n", argv[0]);
exit (0);
}
}
if (timeout)
timeout += time (NULL);
csi = cairo_script_interpreter_create ();
cairo_script_interpreter_install_hooks (csi, &hooks);
if (setjmp (jmp) == 0)
cairo_script_interpreter_feed_stream (csi, stdin);
cairo_device_destroy (hooks.closure);
return cairo_script_interpreter_destroy (csi);
}
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