/*! \todo Finish function documentation!!!
* \brief
* \par Function Description
*
*/
int o_text_get_rendered_bounds (void *user_data, OBJECT *o_current,
int *min_x, int *min_y,
int *max_x, int *max_y)
{
TOPLEVEL *toplevel;
EdaRenderer *renderer;
cairo_t *cr;
cairo_matrix_t render_mtx;
int result, render_flags = 0;
double t, l, r, b;
GschemToplevel *w_current = (GschemToplevel *) user_data;
g_return_val_if_fail ((w_current != NULL), FALSE);
GschemPageView *page_view = gschem_toplevel_get_current_page_view (w_current);
g_return_val_if_fail ((page_view != NULL), FALSE);
toplevel = gschem_toplevel_get_toplevel (w_current);
g_return_val_if_fail ((toplevel != NULL), FALSE);
cr = gdk_cairo_create (gtk_widget_get_window (GTK_WIDGET(page_view)));
/* Set up renderer based on configuration in w_current. Note that we
* *don't* enable hinting, because if its enabled the calculated
* bounds are zoom-level-dependent. */
if (toplevel->show_hidden_text)
render_flags |= EDA_RENDERER_FLAG_TEXT_HIDDEN;
renderer = g_object_ref (w_current->renderer);
g_object_set (G_OBJECT (renderer),
"cairo-context", cr,
"render-flags", render_flags,
NULL);
/* We need to transform the cairo context to approximate world
* coordinates. */
cairo_matrix_init (&render_mtx, 1, 0, 0, -1, -1, 1);
cairo_set_matrix (cr, &render_mtx);
/* Use the renderer to calculate text bounds */
result = eda_renderer_get_user_bounds (renderer, o_current, &l, &t, &r, &b);
/* Clean up */
eda_renderer_destroy (renderer);
cairo_destroy (cr);
/* Round bounds to nearest integer */
*min_x = lrint (fmin (l, r));
*min_y = lrint (fmin (t, b));
*max_x = lrint (fmax (l, r));
*max_y = lrint (fmax (t, b));
return result;
}
/* Callback function registered with libgeda to allow the libgeda
* "bounds" functions to get text bounds using the renderer. If a
* "rendered bounds" function isn't provided, text objects don't get
* used when calculating the extents of the drawing. */
static gboolean
export_text_rendered_bounds (void *user_data,
const GedaObject *object,
gint *left,
gint *top,
gint *right,
gint *bottom)
{
int result;
double t, l, r, b;
EdaRenderer *renderer = EDA_RENDERER (user_data);
result = eda_renderer_get_user_bounds (renderer, object, &l, &t, &r, &b);
*left = lrint (fmin (l,r));
*top = lrint (fmin (t, b));
*right = lrint (fmax (l, r));
*bottom = lrint (fmax (t, b));
return result;
}
