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(hopefully) fix double-buffering design of ArdourCanvas::Image

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This commit is contained in:
Paul Davis 2013-04-16 14:20:04 -04:00
parent ccc9b6adee
commit ef60401d92
1 changed files with 12 additions and 15 deletions
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27
libs/canvas/image.cc
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@ -35,19 +35,20 @@ Image::Image (Group* group, Cairo::Format fmt, int width, int height)
void
Image::render (Rect const& area, Cairo::RefPtr<Cairo::Context> context) const
{
if (_current) {
_surface = Cairo::ImageSurface::create (_current->data.get(),
_current->format,
_current->width,
_current->height,
_current->stride);
if (_need_render && _pending) {
_surface = Cairo::ImageSurface::create (_pending->data.get(),
_pending->format,
_pending->width,
_pending->height,
_pending->stride);
_current = _pending;
}
_current.reset ();
context->set_source (_surface, 0, 0);
context->rectangle (area.x0, area.y0, area.width(), area.height());
context->fill ();
if (_surface) {
context->set_source (_surface, 0, 0);
context->rectangle (area.x0, area.y0, area.width(), area.height());
context->fill ();
}
}
void
@ -83,11 +84,7 @@ Image::accept_data ()
/* must be executed in gui thread */
begin_change ();
_current = _pending;
_pending.reset ();
_need_render = true;
end_change (); // notify canvas that we need redrawing
}