#include "pbd/compose.h"
#include "pbd/signals.h"
+#include "pbd/stacktrace.h"
#include "ardour/types.h"
#include "ardour/dB.h"
using namespace ARDOUR;
using namespace ArdourCanvas;
-bool WaveView::_gradient_waveforms = true;
+double WaveView::_global_gradient_depth = 0.6;
bool WaveView::_global_logscaled = false;
WaveView::Shape WaveView::_global_shape = WaveView::Normal;
+bool WaveView::_global_show_waveform_clipping = true;
PBD::Signal0<void> WaveView::VisualPropertiesChanged;
, _clip_color (0xff0000ff)
, _logscaled (_global_logscaled)
, _shape (_global_shape)
- , _amplitude (1.0)
+ , _gradient_depth (_global_gradient_depth)
, _shape_independent (false)
, _logscaled_independent (false)
- , _region_start (0)
+ , _gradient_depth_independent (false)
+ , _amplitude_above_axis (1.0)
+ , _region_start (region->start())
+ , _sample_start (-1)
+ , _sample_end (-1)
{
VisualPropertiesChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_visual_property_change, this));
}
+WaveView::~WaveView ()
+{
+}
+
void
WaveView::handle_visual_property_change ()
{
changed = true;
}
+ if (!_gradient_depth_independent && (_gradient_depth != global_gradient_depth())) {
+ _gradient_depth = global_gradient_depth();
+ changed = true;
+ }
+
if (changed) {
- invalidate_image_cache ();
+ invalidate_image ();
}
}
void
WaveView::set_fill_color (Color c)
{
- invalidate_image_cache ();
- Fill::set_fill_color (c);
+ if (c != _fill_color) {
+ invalidate_image ();
+ Fill::set_fill_color (c);
+ }
}
void
WaveView::set_outline_color (Color c)
{
- invalidate_image_cache ();
- Outline::set_outline_color (c);
+ if (c != _outline_color) {
+ invalidate_image ();
+ Outline::set_outline_color (c);
+ }
}
void
WaveView::set_samples_per_pixel (double samples_per_pixel)
{
- begin_change ();
-
- _samples_per_pixel = samples_per_pixel;
+ if (samples_per_pixel != _samples_per_pixel) {
+ begin_change ();
- _bounding_box_dirty = true;
- end_change ();
+ _samples_per_pixel = samples_per_pixel;
+
+ _bounding_box_dirty = true;
+
+ end_change ();
+
+ invalidate_image ();
+ }
+}
+
+static inline double
+image_to_window (double wave_origin, double image_start)
+{
+ return wave_origin + image_start;
+}
+
+static inline double
+window_to_image (double wave_origin, double image_start)
+{
+ return image_start - wave_origin;
+}
- invalidate_whole_cache ();
+static inline float
+_log_meter (float power, double lower_db, double upper_db, double non_linearity)
+{
+ return (power < lower_db ? 0.0 : pow((power-lower_db)/(upper_db-lower_db), non_linearity));
}
+static inline float
+alt_log_meter (float power)
+{
+ return _log_meter (power, -192.0, 0.0, 8.0);
+}
+
+struct LineTips {
+ double top;
+ double bot;
+ bool clip_max;
+ bool clip_min;
+
+ LineTips() : top (0.0), bot (0.0), clip_max (false), clip_min (false) {}
+};
+
void
-WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
+WaveView::draw_image (PeakData* _peaks, int n_peaks) const
{
- assert (_samples_per_pixel != 0);
+ _image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, n_peaks, _height);
- if (!_region) {
- return;
- }
+ Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (_image);
- /* p, start and end are offsets from the start of the source.
- area is relative to the position of the region.
- */
-
- int const start = rint (area.x0 + _region_start / _samples_per_pixel);
- int const end = rint (area.x1 + _region_start / _samples_per_pixel);
+ boost::scoped_array<LineTips> tips (new LineTips[n_peaks]);
- int p = start;
- list<CacheEntry*>::iterator cache = _cache.begin ();
+ /* Clip level nominally set to -0.9dBFS to account for inter-sample
+ interpolation possibly clipping (value may be too low).
- while (p < end) {
+ We adjust by the region's own gain (but note: not by any gain
+ automation or its gain envelope) so that clip indicators are closer
+ to providing data about on-disk data. This multiplication is
+ needed because the data we get from AudioRegion::read_peaks()
+ has been scaled by scale_amplitude() already.
+ */
- /* Step through cache entries that end at or before our current position, p */
- while (cache != _cache.end() && (*cache)->end() <= p) {
- ++cache;
- }
+ const double clip_level = 0.98853 * _region->scale_amplitude();
- /* Now either:
- 1. we have run out of cache entries
- 2. the one we are looking at finishes after p but also starts after p.
- 3. the one we are looking at finishes after p and starts before p.
+ if (_shape == WaveView::Rectified) {
- Set up a pointer to the cache entry that we will use on this iteration.
- */
+ /* each peak is a line from the bottom of the waveview
+ * to a point determined by max (_peaks[i].max,
+ * _peaks[i].min)
+ */
- CacheEntry* render = 0;
+ if (_logscaled) {
+ for (int i = 0; i < n_peaks; ++i) {
+ tips[i].bot = height();
+ tips[i].top = position (alt_log_meter (fast_coefficient_to_dB (max (fabs (_peaks[i].max), fabs (_peaks[i].min)))));
- if (cache == _cache.end ()) {
+ if (fabs (_peaks[i].max) >= clip_level) {
+ tips[i].clip_max = true;
+ }
- /* Case 1: we have run out of cache entries, so make a new one for
- the whole required area and put it in the list.
- */
-
- CacheEntry* c = new CacheEntry (this, p, end);
- _cache.push_back (c);
- render = c;
+ if (fabs (_peaks[i].min) >= clip_level) {
+ tips[i].clip_min = true;
+ }
+ }
+ } else {for (int i = 0; i < n_peaks; ++i) {
+ tips[i].bot = height();
+ tips[i].top = position (max (fabs (_peaks[i].max), fabs (_peaks[i].min)));
+
+ if (fabs (_peaks[i].max) >= clip_level) {
+ tips[i].clip_max = true;
+ }
+
+ if (fabs (_peaks[i].min) >= clip_level) {
+ tips[i].clip_min = true;
+ }
+ }
+ }
- } else if ((*cache)->start() > p) {
+ } else {
- /* Case 2: we have a cache entry, but it starts after p, so we
- need another one for the missing bit.
- */
+ if (_logscaled) {
+ for (int i = 0; i < n_peaks; ++i) {
+ Coord top = _peaks[i].min;
+ Coord bot = _peaks[i].max;
- CacheEntry* c = new CacheEntry (this, p, (*cache)->start());
- cache = _cache.insert (cache, c);
- ++cache;
- render = c;
+ if (fabs (top) >= clip_level) {
+ tips[i].clip_max = true;
+ }
+
+ if (fabs (bot) >= clip_level) {
+ tips[i].clip_min = true;
+ }
+
+ if (top > 0.0) {
+ top = position (alt_log_meter (fast_coefficient_to_dB (top)));
+ } else if (top < 0.0) {
+ top = position (-alt_log_meter (fast_coefficient_to_dB (-top)));
+ } else {
+ top = position (0.0);
+ }
+
+ if (bot > 0.0) {
+ bot = position (alt_log_meter (fast_coefficient_to_dB (bot)));
+ } else if (bot < 0.0) {
+ bot = position (-alt_log_meter (fast_coefficient_to_dB (-bot)));
+ } else {
+ bot = position (0.0);
+ }
+
+ tips[i].top = top;
+ tips[i].bot = bot;
+ }
} else {
+ for (int i = 0; i < n_peaks; ++i) {
+
+ if (fabs (_peaks[i].max) >= clip_level) {
+ tips[i].clip_max = true;
+ }
- /* Case 3: we have a cache entry that will do at least some of what
- we have left, so render it.
- */
+ if (fabs (_peaks[i].min) >= clip_level) {
+ tips[i].clip_min = true;
+ }
+
+ tips[i].top = position (_peaks[i].min);
+ tips[i].bot = position (_peaks[i].max);
- render = *cache;
- ++cache;
+ }
}
+ }
- int const this_end = min (end, render->end ());
+ if (gradient_depth() != 0.0) {
+
+ Cairo::RefPtr<Cairo::LinearGradient> gradient (Cairo::LinearGradient::create (0, 0, 0, _height));
+
+ double stops[3];
+
+ double r, g, b, a;
+
+ if (_shape == Rectified) {
+ stops[0] = 0.1;
+ stops[0] = 0.3;
+ stops[0] = 0.9;
+ } else {
+ stops[0] = 0.1;
+ stops[1] = 0.5;
+ stops[2] = 0.9;
+ }
+
+ color_to_rgba (_fill_color, r, g, b, a);
+ gradient->add_color_stop_rgba (stops[0], r, g, b, a);
+ gradient->add_color_stop_rgba (stops[2], r, g, b, a);
+
+ /* generate a new color for the middle of the gradient */
+ double h, s, v;
+ color_to_hsv (_fill_color, h, s, v);
+ /* change v towards white */
+ v *= 1.0 - gradient_depth();
+ Color center = hsv_to_color (h, s, v, a);
+ color_to_rgba (center, r, g, b, a);
+ gradient->add_color_stop_rgba (stops[1], r, g, b, a);
+
+ context->set_source (gradient);
+ } else {
+ set_source_rgba (context, _fill_color);
+ }
+
+ /* ensure single-pixel lines */
- Coord const left = p - _region_start / _samples_per_pixel;
- Coord const right = this_end - _region_start / _samples_per_pixel;
+ context->set_line_width (0.5);
+ context->translate (0.5, 0.0);
+
+ /* draw the lines */
+
+ if (_shape == WaveView::Rectified) {
+ for (int i = 0; i < n_peaks; ++i) {
+ context->move_to (i, tips[i].top); /* down 1 pixel */
+ context->line_to (i, tips[i].bot);
+ context->stroke ();
+ }
+ } else {
+ for (int i = 0; i < n_peaks; ++i) {
+ context->move_to (i, tips[i].top);
+ context->line_to (i, tips[i].bot);
+ context->stroke ();
+ }
+ }
+
+ /* now add dots to the top and bottom of each line (this is
+ * modelled on pyramix, except that we add clipping indicators.
+ */
+
+ if (_global_show_waveform_clipping) {
- context->save ();
+ context->set_source_rgba (0, 0, 0, 1.0);
- context->rectangle (left, area.y0, right, area.height());
- context->clip ();
+ /* the height of the clip-indicator should be at most 7 pixels,
+ or 5% of the height of the waveview item.
+ */
+ const double clip_height = min (7.0, ceil (_height * 0.05));
- context->translate (left, 0);
+ for (int i = 0; i < n_peaks; ++i) {
+ context->move_to (i, tips[i].top);
+
+ bool show_top_clip = (_shape == WaveView::Rectified && (tips[i].clip_max || tips[i].clip_min)) ||
+ tips[i].clip_max;
+
+ if (show_top_clip) {
+ context->set_source_rgba (1.0, 0, 0, 1.0);
+ context->rel_line_to (0, clip_height);
+ context->stroke ();
+ context->set_source_rgba (0.0, 0, 0, 1.0);
+ } else {
+ context->rel_line_to (0, 1.0);
+ context->stroke ();
+ }
- context->set_source (render->image(), render->start() - p, 0);
- context->paint ();
-
- context->restore ();
+ if (_shape != WaveView::Rectified) {
+ context->move_to (i, tips[i].bot);
+ if (tips[i].clip_min) {
+ context->set_source_rgba (1.0, 0, 0, 1.0);
+ context->rel_line_to (0, -clip_height);
+ context->stroke ();
+ context->set_source_rgba (0.0, 0, 0, 1.0);
+ } else {
+ context->rel_line_to (0, -1.0);
+ context->stroke ();
+ }
+ }
+ }
+ }
- p = min (end, render->end ());
+ if (show_zero_line()) {
+ set_source_rgba (context, _zero_color);
+ context->move_to (0, position (0.0));
+ context->line_to (n_peaks, position (0.0));
+ context->stroke ();
}
}
void
-WaveView::compute_bounding_box () const
+WaveView::ensure_cache (framepos_t start, framepos_t end) const
{
- if (_region) {
- _bounding_box = Rect (0, 0, _region->length() / _samples_per_pixel, _height);
- } else {
- _bounding_box = boost::optional<Rect> ();
+ if (_image && _sample_start <= start && _sample_end >= end) {
+ /* cache already covers required range, do nothing */
+ return;
}
+
+ /* sample position is canonical here, and we want to generate
+ * an image that spans about twice the canvas width
+ */
- _bounding_box_dirty = false;
-}
-
-void
-WaveView::set_height (Distance height)
-{
- begin_change ();
+ const framepos_t center = start + ((end - start) / 2);
+ const framecnt_t canvas_samples = 2 * (_canvas->visible_area().width() * _samples_per_pixel);
+
+ /* we can request data from anywhere in the Source, between 0 and its length
+ */
- _height = height;
+ _sample_start = max ((framepos_t) 0, (center - canvas_samples));
+ _sample_end = min (center + canvas_samples, _region->source_length (0));
- _bounding_box_dirty = true;
- end_change ();
+ double pixel_start = floor (_sample_start / (double) _samples_per_pixel);
+ double pixel_end = ceil (_sample_end / (double) _samples_per_pixel);
+ int n_peaks = llrintf (pixel_end - pixel_start);
+
+ boost::scoped_array<ARDOUR::PeakData> peaks (new PeakData[n_peaks]);
- invalidate_image_cache ();
+ _region->read_peaks (peaks.get(), n_peaks,
+ _sample_start, _sample_end - _sample_start,
+ _channel,
+ _samples_per_pixel);
+
+ draw_image (peaks.get(), n_peaks);
}
void
-WaveView::set_channel (int channel)
+WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
- begin_change ();
+ assert (_samples_per_pixel != 0);
+
+ if (!_region) {
+ return;
+ }
+
+ Rect self = item_to_window (Rect (0.0, 0.0, floor (_region->length() / _samples_per_pixel), _height));
+ boost::optional<Rect> d = self.intersection (area);
+
+ if (!d) {
+ return;
+ }
- _channel = channel;
+ Rect draw = d.get();
- _bounding_box_dirty = true;
- end_change ();
+ /* window coordinates - pixels where x=0 is the left edge of the canvas
+ * window. We round up and down in case we were asked to
+ * draw "between" pixels at the start and/or end.
+ */
+
+ const double draw_start = floor (draw.x0);
+ const double draw_end = ceil (draw.x1);
- invalidate_whole_cache ();
+ // cerr << "Need to draw " << draw_start << " .. " << draw_end << endl;
+
+ /* image coordnates: pixels where x=0 is the start of this waveview,
+ * wherever it may be positioned. thus image_start=N means "an image
+ * that beings N pixels after the start of region that this waveview is
+ * representing.
+ */
+
+ const framepos_t image_start = window_to_image (self.x0, draw_start);
+ const framepos_t image_end = window_to_image (self.x0, draw_end);
+
+ // cerr << "Image/WV space: " << image_start << " .. " << image_end << endl;
+
+ /* sample coordinates - note, these are not subject to rounding error */
+ framepos_t sample_start = _region_start + (image_start * _samples_per_pixel);
+ framepos_t sample_end = _region_start + (image_end * _samples_per_pixel);
+
+ // cerr << "Sample space: " << sample_start << " .. " << sample_end << endl;
+
+ ensure_cache (sample_start, sample_end);
+
+ // cerr << "Cache contains " << _cache->pixel_start() << " .. " << _cache->pixel_end() << " / "
+ // << _cache->sample_start() << " .. " << _cache->sample_end()
+ // << endl;
+
+ double image_offset = (_sample_start - _region->start()) / _samples_per_pixel;
+
+ // cerr << "Offset into image to place at zero: " << image_offset << endl;
+
+ context->rectangle (draw_start, draw.y0, draw_end - draw_start, draw.height());
+
+ /* round image origin position to an exact pixel in device space to
+ * avoid blurring
+ */
+
+ double x = self.x0 + image_offset;
+ double y = self.y0;
+ context->user_to_device (x, y);
+ x = round (x);
+ y = round (y);
+ context->device_to_user (x, y);
+
+ context->set_source (_image, x, y);
+ context->fill ();
}
void
-WaveView::invalidate_whole_cache ()
+WaveView::compute_bounding_box () const
+{
+ if (_region) {
+ _bounding_box = Rect (0.0, 0.0, _region->length() / _samples_per_pixel, _height);
+ } else {
+ _bounding_box = boost::optional<Rect> ();
+ }
+
+ _bounding_box_dirty = false;
+}
+
+void
+WaveView::set_height (Distance height)
{
- for (list<CacheEntry*>::iterator i = _cache.begin(); i != _cache.end(); ++i) {
- delete *i;
+ if (height != _height) {
+ begin_change ();
+
+ _height = height;
+
+ _bounding_box_dirty = true;
+ end_change ();
+
+ invalidate_image ();
}
-
- _cache.clear ();
- _canvas->item_visual_property_changed (this);
}
void
-WaveView::invalidate_image_cache ()
+WaveView::set_channel (int channel)
{
- for (list<CacheEntry*>::iterator i = _cache.begin(); i != _cache.end(); ++i) {
- (*i)->clear_image ();
+ if (channel != _channel) {
+ begin_change ();
+
+ _channel = channel;
+
+ _bounding_box_dirty = true;
+ end_change ();
+
+ invalidate_image ();
}
- _canvas->item_visual_property_changed (this);
}
void
-WaveView::region_resized ()
+WaveView::invalidate_image ()
{
- _bounding_box_dirty = true;
+ begin_visual_change ();
+
+ _image.clear ();
+ _sample_start = -1;
+ _sample_end = -1;
+
+ end_visual_change ();
}
+
void
WaveView::set_logscaled (bool yn)
{
if (_logscaled != yn) {
_logscaled = yn;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
void
-WaveView::set_amplitude (double a)
+WaveView::gain_changed ()
{
- if (_amplitude != a) {
- _amplitude = a;
- invalidate_image_cache ();
- }
+ invalidate_image ();
}
void
{
if (_zero_color != c) {
_zero_color = c;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
{
if (_clip_color != c) {
_clip_color = c;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
{
if (_show_zero != yn) {
_show_zero = yn;
- invalidate_image_cache ();
+ invalidate_image ();
}
}
{
if (_shape != s) {
_shape = s;
- invalidate_image_cache ();
+ invalidate_image ();
+ }
+}
+
+void
+WaveView::set_amplitude_above_axis (double a)
+{
+ if (_amplitude_above_axis != a) {
+ _amplitude_above_axis = a;
+ invalidate_image ();
}
}
if (_global_logscaled != yn) {
_global_logscaled = yn;
VisualPropertiesChanged (); /* EMIT SIGNAL */
-
}
}
void
-WaveView::set_region_start (frameoffset_t start)
+WaveView::region_resized ()
{
- _region_start = start;
- _bounding_box_dirty = true;
-}
+ if (!_region) {
+ return;
+ }
-/** Construct a new CacheEntry with peak data between two offsets
- * in the source.
- */
-WaveView::CacheEntry::CacheEntry (
- WaveView const * wave_view,
- int start,
- int end
- )
- : _wave_view (wave_view)
- , _start (start)
- , _end (end)
-{
- _n_peaks = _end - _start;
- _peaks.reset (new PeakData[_n_peaks]);
-
- _wave_view->_region->read_peaks (
- _peaks.get(),
- _n_peaks,
- _start * _wave_view->_samples_per_pixel,
- (_end - _start) * _wave_view->_samples_per_pixel,
- _wave_view->_channel,
- _wave_view->_samples_per_pixel
- );
-}
+ /* special: do not use _region->length() here to compute
+ bounding box because it will already have changed.
+
+ if we have a bounding box, use it.
+ */
-WaveView::CacheEntry::~CacheEntry ()
-{
-}
+ _pre_change_bounding_box = _bounding_box;
-static inline float
-_log_meter (float power, double lower_db, double upper_db, double non_linearity)
-{
- return (power < lower_db ? 0.0 : pow((power-lower_db)/(upper_db-lower_db), non_linearity));
-}
+ _bounding_box_dirty = true;
+ compute_bounding_box ();
-static inline float
-alt_log_meter (float power)
-{
- return _log_meter (power, -192.0, 0.0, 8.0);
+ end_change ();
}
-Cairo::RefPtr<Cairo::ImageSurface>
-WaveView::CacheEntry::image ()
+Coord
+WaveView::position (double s) const
{
- if (!_image) {
-
- _image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _n_peaks, _wave_view->_height);
- Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (_image);
-
- /* Draw the edge of the waveform, top half first, the loop back
- * for the bottom half to create a clockwise path
- */
-
- context->begin_new_path();
-
-
- if (_wave_view->_shape == WaveView::Rectified) {
-
- /* top edge of waveform is based on max (fabs (peak_min, peak_max))
- */
-
- if (_wave_view->_logscaled) {
- for (int i = 0; i < _n_peaks; ++i) {
- context->line_to (i + 0.5, position (_wave_view->amplitude() *
- alt_log_meter (fast_coefficient_to_dB (
- max (fabs (_peaks[i].max), fabs (_peaks[i].min))))));
- }
- } else {
- for (int i = 0; i < _n_peaks; ++i) {
- context->line_to (i + 0.5, position (_wave_view->amplitude() * max (fabs (_peaks[i].max), fabs (_peaks[i].min))));
- }
- }
-
- } else {
- if (_wave_view->_logscaled) {
- for (int i = 0; i < _n_peaks; ++i) {
- Coord y = _peaks[i].max;
- if (y > 0.0) {
- context->line_to (i + 0.5, position (_wave_view->amplitude() * alt_log_meter (fast_coefficient_to_dB (y))));
- } else if (y < 0.0) {
- context->line_to (i + 0.5, position (_wave_view->amplitude() * -alt_log_meter (fast_coefficient_to_dB (-y))));
- } else {
- context->line_to (i + 0.5, position (0.0));
- }
- }
- } else {
- for (int i = 0; i < _n_peaks; ++i) {
- context->line_to (i + 0.5, position (_wave_view->amplitude() * _peaks[i].max));
- }
- }
- }
-
- /* from final top point, move out of the clip zone */
-
- context->line_to (_n_peaks + 10, position (0.0));
-
-
- /* bottom half, in reverse */
-
- if (_wave_view->_shape == WaveView::Rectified) {
-
- /* lower half: drop to the bottom, then a line back to
- * beyond the left edge of the clip region
- */
-
- context->line_to (_n_peaks + 10, _wave_view->_height);
- context->line_to (-10.0, _wave_view->_height);
-
- } else {
-
- if (_wave_view->_logscaled) {
- for (int i = _n_peaks-1; i >= 0; --i) {
- Coord y = _peaks[i].min;
- if (y > 0.0) {
- context->line_to (i + 0.5, position (_wave_view->amplitude() * alt_log_meter (fast_coefficient_to_dB (y))));
- } else if (y < 0.0) {
- context->line_to (i + 0.5, position (_wave_view->amplitude() * -alt_log_meter (fast_coefficient_to_dB (-y))));
- } else {
- context->line_to (i + 0.5, position (0.0));
- }
- }
- } else {
- for (int i = _n_peaks-1; i >= 0; --i) {
- context->line_to (i + 0.5, position (_wave_view->amplitude() * _peaks[i].min));
- }
- }
-
- /* from final bottom point, move out of the clip zone */
-
- context->line_to (-10.0, position (0.0));
- }
-
- context->close_path ();
-
- if (WaveView::gradient_waveforms()) {
-
- Cairo::RefPtr<Cairo::LinearGradient> gradient (Cairo::LinearGradient::create (0, 0, 0, _wave_view->_height));
-
- double stops[3];
-
- double r, g, b, a;
-
- if (_wave_view->_shape == Rectified) {
- stops[0] = 0.1;
- stops[0] = 0.3;
- stops[0] = 0.9;
- } else {
- stops[0] = 0.1;
- stops[1] = 0.5;
- stops[2] = 0.9;
- }
-
- color_to_rgba (_wave_view->_fill_color, r, g, b, a);
- gradient->add_color_stop_rgba (stops[0], r, g, b, a);
- gradient->add_color_stop_rgba (stops[2], r, g, b, a);
-
- /* generate a new color for the middle of the gradient */
- double h, s, v;
- color_to_hsv (_wave_view->_fill_color, h, s, v);
- /* tone down the saturation */
- s *= 0.60;
- Color center = hsv_to_color (h, s, v, a);
- color_to_rgba (center, r, g, b, a);
- gradient->add_color_stop_rgba (stops[1], r, g, b, a);
-
- context->set_source (gradient);
- } else {
- set_source_rgba (context, _wave_view->_fill_color);
- }
-
- context->fill_preserve ();
- _wave_view->setup_outline_context (context);
- context->stroke ();
-
- if (_wave_view->show_zero_line()) {
- set_source_rgba (context, _wave_view->_zero_color);
- context->move_to (0, position (0.0));
- context->line_to (_n_peaks, position (0.0));
- context->stroke ();
- }
- }
-
- return _image;
-}
+ /* it is important that this returns an integral value, so that we
+ can ensure correct single pixel behaviour.
+ */
+ Coord pos;
-Coord
-WaveView::CacheEntry::position (double s) const
-{
- switch (_wave_view->_shape) {
+ switch (_shape) {
case Rectified:
- return _wave_view->_height - (s * _wave_view->_height);
+ pos = floor (_height - (s * _height));
default:
+ pos = floor ((1.0-s) * (_height / 2.0));
break;
}
- return (s+1.0) * (_wave_view->_height / 2.0);
+
+ return min (_height, (max (0.0, pos)));
}
void
-WaveView::CacheEntry::clear_image ()
+WaveView::set_global_gradient_depth (double depth)
{
- _image.clear ();
+ if (_global_gradient_depth != depth) {
+ _global_gradient_depth = depth;
+ VisualPropertiesChanged (); /* EMIT SIGNAL */
+ }
}
-
+
void
-WaveView::set_gradient_waveforms (bool yn)
+WaveView::set_global_show_waveform_clipping (bool yn)
{
- if (_gradient_waveforms != yn) {
- _gradient_waveforms = yn;
+ if (_global_show_waveform_clipping != yn) {
+ _global_show_waveform_clipping = yn;
VisualPropertiesChanged (); /* EMIT SIGNAL */
}
}
+
projects / ardour.git / blobdiff