static const char *
_spectre_render_page (const char *filename,
const char *page_label,
cairo_surface_t **surface_out)
{
static const cairo_user_data_key_t key;
SpectreDocument *document;
SpectreStatus status;
int width, height, stride;
unsigned char *pixels;
cairo_surface_t *surface;
document = spectre_document_new ();
spectre_document_load (document, filename);
status = spectre_document_status (document);
if (status) {
spectre_document_free (document);
return spectre_status_to_string (status);
}
if (page_label) {
SpectrePage *page;
SpectreRenderContext *rc;
page = spectre_document_get_page_by_label (document, page_label);
spectre_document_free (document);
if (page == NULL)
return "page not found";
spectre_page_get_size (page, &width, &height);
rc = spectre_render_context_new ();
spectre_render_context_set_page_size (rc, width, height);
spectre_page_render (page, rc, &pixels, &stride);
spectre_render_context_free (rc);
status = spectre_page_status (page);
spectre_page_free (page);
if (status) {
free (pixels);
return spectre_status_to_string (status);
}
} else {
spectre_document_get_page_size (document, &width, &height);
spectre_document_render (document, &pixels, &stride);
spectre_document_free (document);
}
surface = cairo_image_surface_create_for_data (pixels,
CAIRO_FORMAT_RGB24,
width, height,
stride);
cairo_surface_set_user_data (surface, &key,
pixels, (cairo_destroy_func_t) free);
*surface_out = surface;
return NULL;
}
static void
go_spectre_build_surface (GOSpectre *spectre)
{
guint8 *data = NULL;
int rowstride;
static const cairo_user_data_key_t key;
spectre_document_render (spectre->doc, &data, &rowstride);
if (!data)
return;
if (spectre_document_status (spectre->doc) != SPECTRE_STATUS_SUCCESS) {
g_free (data);
return;
}
spectre->surface = cairo_image_surface_create_for_data (data,
CAIRO_FORMAT_RGB24,
spectre->parent.width, spectre->parent.height,
rowstride);
cairo_surface_set_user_data (spectre->surface, &key,
data, (cairo_destroy_func_t) g_free);
}