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use existing partial existing waveview images (if they exist) while waiting for the full ones

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This commit is contained in:
Paul Davis 2015-06-04 17:45:58 -04:00
parent 9e44e46c4a
commit bc945bb3d3
2 changed files with 92 additions and 21 deletions
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15
libs/canvas/canvas/wave_view.h
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@ -143,7 +143,8 @@ class LIBCANVAS_API WaveViewCache
Coord height,
float amplitude,
Color fill_color,
double samples_per_pixel);
double samples_per_pixel,
bool& full_image);
private:
/* an unsorted, unindexd collection of cache entries associated with
@ -250,6 +251,8 @@ public:
double gradient_depth() const { return _gradient_depth; }
void set_shape (Shape);
void set_always_get_image_in_thread (bool yn);
/* currently missing because we don't need them (yet):
set_shape_independent();
set_logscaled_independent()
@ -330,6 +333,12 @@ public:
*/
mutable bool get_image_in_thread;
/** If true, calls to get_image() will render a missing wave image
in the calling thread. Set true for waveviews we expect to
keep updating (e.g. while recording)
*/
bool always_get_image_in_thread;
/** Set to true by render(). Used so that we know if the wave view
* has actually been displayed on screen. ::set_height() when this
* is true does not use get_image_in_thread, because it implies
@ -351,8 +360,8 @@ public:
void handle_visual_property_change ();
void handle_clip_level_change ();
boost::shared_ptr<WaveViewCache::Entry> get_image (framepos_t start, framepos_t end) const;
boost::shared_ptr<WaveViewCache::Entry> get_image_from_cache (framepos_t start, framepos_t end) const;
boost::shared_ptr<WaveViewCache::Entry> get_image (framepos_t start, framepos_t end, bool& full_image) const;
boost::shared_ptr<WaveViewCache::Entry> get_image_from_cache (framepos_t start, framepos_t end, bool& full_image) const;
ArdourCanvas::Coord y_extent (double, bool) const;
void draw_image (Cairo::RefPtr<Cairo::ImageSurface>&, ARDOUR::PeakData*, int n_peaks, boost::shared_ptr<WaveViewThreadRequest>) const;