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new image cache design for waveviews, with various fixes.

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Rather than maintain a set of images in a cache, when we no longer have the required waveform data, create a new image that is appropriately centered and extends to roughly twice the screen width (or the limits of the region's source file(s), as necessary)
This commit is contained in:
Paul Davis 2013-06-20 14:37:31 -04:00
parent 3604bf12a2
commit 27c943f1dd
3 changed files with 84 additions and 165 deletions
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11
libs/canvas/canvas/wave_view.h
View file

@ -71,6 +71,7 @@ public:
WaveView (Group *, boost::shared_ptr<ARDOUR::AudioRegion>);
~WaveView ();
void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const;
void compute_bounding_box () const;
@ -141,7 +142,7 @@ private:
class CacheEntry
{
public:
CacheEntry (WaveView const *, double, double);
CacheEntry (WaveView const *, double, double, ARDOUR::framepos_t, ARDOUR::framepos_t);
~CacheEntry ();
double pixel_start () const {
@ -171,7 +172,7 @@ private:
Coord position (Coord) const;
WaveView const * _wave_view;
double _pixel_start;
double _pixel_end;
ARDOUR::framecnt_t _sample_start;
@ -208,8 +209,8 @@ private:
* value as the crossfade editor needs to alter it.
*/
ARDOUR::frameoffset_t _region_start;
mutable std::list<CacheEntry*> _cache;
mutable CacheEntry* _cache;
PBD::ScopedConnection invalidation_connection;
@ -220,6 +221,8 @@ private:
static PBD::Signal0<void> VisualPropertiesChanged;
void handle_visual_property_change ();
void ensure_cache (ARDOUR::framecnt_t pixel_start, ARDOUR::framecnt_t pixel_end,
ARDOUR::framepos_t sample_start, ARDOUR::framepos_t sample_end) const;
};
}