/* Render layout in a specified format to an open FILE */
int gvRender(GVC_t *gvc, graph_t *g, const char *format, FILE *out)
{
int rc;
GVJ_t *job;
g = g->root;
/* create a job for the required format */
rc = gvjobs_output_langname(gvc, format);
job = gvc->job;
if (rc == NO_SUPPORT) {
agerr (AGERR, "Format: \"%s\" not recognized. Use one of:%s\n",
format, gvplugin_list(gvc, API_device, format));
return -1;
}
job->output_lang = gvrender_select(job, job->output_langname);
if (!LAYOUT_DONE(g) && !(job->flags & LAYOUT_NOT_REQUIRED)) {
agerrorf( "Layout was not done\n");
return -1;
}
job->output_file = out;
if (out == NULL)
job->flags |= OUTPUT_NOT_REQUIRED;
rc = gvRenderJobs(gvc, g);
gvrender_end_job(job);
gvjobs_delete(gvc);
return rc;
}
/* Render layout in a specified format to an external context */
int gvRenderContext(GVC_t *gvc, graph_t *g, const char *format, void *context)
{
int rc;
GVJ_t *job;
g = g->root;
/* create a job for the required format */
rc = gvjobs_output_langname(gvc, format);
job = gvc->job;
if (rc == NO_SUPPORT) {
agerr(AGERR, "Format: \"%s\" not recognized. Use one of:%s\n",
format, gvplugin_list(gvc, API_device, format));
return -1;
}
job->output_lang = gvrender_select(job, job->output_langname);
if (!GD_drawing(g) && !(job->flags & LAYOUT_NOT_REQUIRED)) {
fprintf(stderr, "Layout was not done\n");
return -1;
}
job->context = context;
job->external_context = TRUE;
gvRenderJobs(gvc, g);
gvrender_end_job(job);
gvdevice_finalize(job);
gvjobs_delete(gvc);
return 0;
}
/* Render layout in a specified format to a malloc'ed string */
int gvRenderData(GVC_t *gvc, graph_t *g, const char *format, char **result, unsigned int *length)
{
int rc;
GVJ_t *job;
g = g->root;
/* create a job for the required format */
rc = gvjobs_output_langname(gvc, format);
job = gvc->job;
if (rc == NO_SUPPORT) {
agerr(AGERR, "Format: \"%s\" not recognized. Use one of:%s\n",
format, gvplugin_list(gvc, API_device, format));
return -1;
}
job->output_lang = gvrender_select(job, job->output_langname);
if (!LAYOUT_DONE(g) && !(job->flags & LAYOUT_NOT_REQUIRED)) {
agerrorf( "Layout was not done\n");
return -1;
}
/* page size on Linux, Mac OS X and Windows */
#define OUTPUT_DATA_INITIAL_ALLOCATION 4096
if(!result || !(*result = malloc(OUTPUT_DATA_INITIAL_ALLOCATION))) {
agerr(AGERR, "failure malloc'ing for result string");
return -1;
}
job->output_data = *result;
job->output_data_allocated = OUTPUT_DATA_INITIAL_ALLOCATION;
job->output_data_position = 0;
rc = gvRenderJobs(gvc, g);
gvrender_end_job(job);
if (rc == 0) {
*result = job->output_data;
*length = job->output_data_position;
}
gvjobs_delete(gvc);
return rc;
}
