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remove intermediate GdkPixbuf from waveview rendering, and use shared_array<> to manage peak data

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This commit is contained in:
Paul Davis 2013-04-10 15:27:55 -04:00
parent 204da61f98
commit ae2b39b2e3
2 changed files with 62 additions and 24 deletions
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53
libs/canvas/wave_view.cc
View file

@ -1,3 +1,23 @@
/*
Copyright (C) 2011-2013 Paul Davis
Author: Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cairomm/cairomm.h>
#include "gtkmm2ext/utils.h"
@ -124,7 +144,7 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons
context->translate (left, 0);
Gdk::Cairo::set_source_pixbuf (context, render->pixbuf (), render->start() - p, 0);
context->set_source (render->image(), render->start() - p, 0);
context->paint ();
context->restore ();
@ -168,7 +188,7 @@ WaveView::set_height (Distance height)
_bounding_box_dirty = true;
end_change ();
invalidate_pixbuf_cache ();
invalidate_image_cache ();
}
void
@ -195,10 +215,10 @@ WaveView::invalidate_whole_cache ()
}
void
WaveView::invalidate_pixbuf_cache ()
WaveView::invalidate_image_cache ()
{
for (list<CacheEntry*>::iterator i = _cache.begin(); i != _cache.end(); ++i) {
(*i)->clear_pixbuf ();
(*i)->clear_image ();
}
}
@ -228,10 +248,10 @@ WaveView::CacheEntry::CacheEntry (
, _end (end)
{
_n_peaks = _end - _start;
_peaks = new PeakData[_n_peaks];
_peaks.reset (new PeakData[_n_peaks]);
_wave_view->_region->read_peaks (
_peaks,
_peaks.get(),
_n_peaks,
_start * _wave_view->_frames_per_pixel,
(_end - _start) * _wave_view->_frames_per_pixel,
@ -242,16 +262,15 @@ WaveView::CacheEntry::CacheEntry (
WaveView::CacheEntry::~CacheEntry ()
{
delete[] _peaks;
}
Glib::RefPtr<Gdk::Pixbuf>
WaveView::CacheEntry::pixbuf ()
Cairo::RefPtr<Cairo::ImageSurface>
WaveView::CacheEntry::image ()
{
if (!_pixbuf) {
_pixbuf = Gdk::Pixbuf::create (Gdk::COLORSPACE_RGB, true, 8, _n_peaks, _wave_view->_height);
Cairo::RefPtr<Cairo::ImageSurface> surface = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _n_peaks, _wave_view->_height);
Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (surface);
if (!_image) {
_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _n_peaks, _wave_view->_height);
Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (_image);
_wave_view->setup_outline_context (context);
context->move_to (0.5, position (_peaks[0].min));
@ -272,11 +291,9 @@ WaveView::CacheEntry::pixbuf ()
context->line_to (i + 0.5, position (_peaks[i].min) + 1);
context->stroke ();
}
Gtkmm2ext::convert_bgra_to_rgba (surface->get_data(), _pixbuf->get_pixels(), _n_peaks, _wave_view->_height);
}
return _pixbuf;
return _image;
}
@ -287,9 +304,9 @@ WaveView::CacheEntry::position (float s) const
}
void
WaveView::CacheEntry::clear_pixbuf ()
WaveView::CacheEntry::clear_image ()
{
_pixbuf.reset ();
_image.clear ();
}