Finished surface
Christophe TROESTLER <[email protected]>
| Newsgroups | gmane.comp.lib.cairo |
|---|---|
| Organization | Universite de Mons (http://math.umons.ac.be/anum/) |
| Message-ID | <20130808.205055.1072367653407245036.Christophe.Troestler@umons.ac.be> |
Hi, According to the manual¹, after a surface is finished, "Further drawing to the surface will [...] trigger a CAIRO_STATUS_SURFACE_FINISHED error." However the attached code shows that cairo_stroke aborts the program instead of setting the appropriate error. Is this considered the right behavior? Is there a way to avoid the abort and have an error instead (I did not see any way of testing whether a surface is finished or not — this would alow testing before running cairo_stroke). Best, Chris ¹ http://www.cairographics.org/manual/cairo-cairo-surface-t.html#cairo-surface-finish -- cairo mailing list [email protected] http://lists.cairographics.org/mailman/listinfo/cairo
finish.c
(text/plain, 745 B)
#include <stdio.h>
#include <cairo/cairo.h>
#include <cairo/cairo-svg.h>
void print_status(cairo_t *ctx)
{
cairo_status_t st;
st = cairo_status(ctx);
printf("status = %s\n", cairo_status_to_string(st));
fflush(stdout);
}
int main(void)
{
cairo_surface_t * surf;
cairo_t *ctx;
surf = cairo_svg_surface_create("finish.svg", 100., 100.);
ctx = cairo_create(surf);
cairo_set_line_width(ctx, 1.);
cairo_move_to(ctx, 0., 0.);
cairo_line_to(ctx, 100., 100.);
cairo_stroke(ctx);
cairo_surface_finish(surf);
cairo_line_to(ctx, 100., 100.);
print_status(ctx);
cairo_stroke(ctx);
print_status(ctx);
return(0);
}
/* Local Variables: */
/* compile-command: "gcc -o finish finish.c -lcairo" */
/* End: */