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allow Canvas::Text to have outline drawn in a contrasting color (based on actual color)

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This commit is contained in:
Paul Davis 2014-06-30 10:39:26 -04:00
parent 471570705d
commit 5974f4730b
1 changed files with 16 additions and 3 deletions
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19
libs/canvas/text.cc
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@ -41,6 +41,7 @@ Text::Text (Canvas* c)
, _need_redraw (false)
, _clamped_width (COORD_MAX)
{
_outline = false;
}
Text::Text (Item* parent)
@ -53,6 +54,7 @@ Text::Text (Item* parent)
, _need_redraw (false)
, _clamped_width (COORD_MAX)
{
_outline = false;
}
Text::~Text ()
@ -121,9 +123,17 @@ Text::_redraw (Glib::RefPtr<Pango::Layout> layout) const
/* and draw, in the appropriate color of course */
set_source_rgba (img_context, _color);
layout->show_in_cairo_context (img_context);
if (_outline) {
set_source_rgba (img_context, _outline_color);
layout->update_from_cairo_context (img_context);
pango_cairo_layout_path (img_context->cobj(), layout->gobj());
img_context->stroke_preserve ();
set_source_rgba (img_context, _color);
img_context->fill ();
} else {
set_source_rgba (img_context, _color);
layout->show_in_cairo_context (img_context);
}
/* text has now been rendered in _image and is ready for blit in
* ::render
@ -211,6 +221,9 @@ Text::set_color (Color color)
begin_change ();
_color = color;
if (_outline) {
set_outline_color (contrasting_text_color (_color));
}
_need_redraw = true;
end_change ();