static void
add_underline (PangoRenderer *renderer,
LineState *state,
PangoFontMetrics *metrics,
int base_x,
int base_y,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect)
{
PangoRectangle *current_rect = &state->underline_rect;
PangoRectangle new_rect;
int underline_thickness = pango_font_metrics_get_underline_thickness (metrics);
int underline_position = pango_font_metrics_get_underline_position (metrics);
new_rect.x = base_x + logical_rect->x;
new_rect.width = logical_rect->width;
new_rect.height = underline_thickness;
new_rect.y = base_y;
switch (renderer->underline)
{
case PANGO_UNDERLINE_NONE:
g_assert_not_reached ();
break;
case PANGO_UNDERLINE_SINGLE:
case PANGO_UNDERLINE_DOUBLE:
case PANGO_UNDERLINE_ERROR:
new_rect.y -= underline_position;
break;
case PANGO_UNDERLINE_LOW:
new_rect.y += ink_rect->y + ink_rect->height + underline_thickness;
break;
}
if (renderer->underline == state->underline &&
new_rect.y == current_rect->y &&
new_rect.height == current_rect->height)
{
current_rect->width = new_rect.x + new_rect.width - current_rect->x;
}
else
{
draw_underline (renderer, state);
*current_rect = new_rect;
state->underline = renderer->underline;
}
}
static int
get_pango_vertical_offset (PangoLayout *layout)
{
const PangoFontDescription *desc;
PangoContext *context;
PangoLanguage *language;
PangoFontMetrics *metrics;
int baseline;
int strikethrough;
int thickness;
context = pango_layout_get_context (layout);
language = pango_language_get_default ();
desc = pango_layout_get_font_description (layout);
metrics = pango_context_get_metrics (context, desc, language);
baseline = pango_layout_get_baseline (layout);
strikethrough = pango_font_metrics_get_strikethrough_position (metrics);
thickness = pango_font_metrics_get_underline_thickness (metrics);
return PANGO_PIXELS (baseline - strikethrough - thickness / 2);
}
/* Helper function to draw the underline for one layout run; the descent field gives
* the descent of the ink for the actual text in the layout run.
*/
static void
draw_underline (GnomePrintContext *gpc, PangoFontMetrics *metrics, PangoUnderline uline, gint x, gint width, gint descent)
{
gint underline_thickness = pango_font_metrics_get_underline_thickness (metrics);
gint underline_position = pango_font_metrics_get_underline_position (metrics);
gint y_off = 0; /* Quiet GCC */
switch (uline) {
case PANGO_UNDERLINE_NONE:
g_assert_not_reached();
break;
case PANGO_UNDERLINE_SINGLE:
y_off = underline_position - underline_thickness;
break;
case PANGO_UNDERLINE_DOUBLE:
y_off = underline_position - underline_thickness;
break;
case PANGO_UNDERLINE_LOW:
y_off = - 2 * underline_thickness - descent;
break;
case PANGO_UNDERLINE_ERROR:
draw_error_underline (gpc,
(gdouble) x / PANGO_SCALE,
(gdouble) (underline_position - 3 * underline_thickness) / PANGO_SCALE,
(gdouble) width / PANGO_SCALE,
(gdouble) (3 * underline_thickness) / PANGO_SCALE);
return;
}
rect_filled (gpc,
x, y_off,
width, underline_thickness);
if (uline == PANGO_UNDERLINE_DOUBLE)
rect_filled (gpc,
x, y_off - 2 * underline_thickness,
width, underline_thickness);
}
