mirror of
https://github.com/Ardour/ardour.git
synced 2025-12-07 23:35:03 +01:00
cleanup ArdourCanvas::WaveView
Mostly this just involved removing the private CacheEntry class that really served no further purpose once the design reverted to a single cached image
This commit is contained in:
Paul Davis
parent
645878db97
commit
c6fe6b0996
2 changed files with 221 additions and 457 deletions
|
|
@ -21,8 +21,6 @@
|
|||
#include <cmath>
|
||||
#include <cairomm/cairomm.h>
|
||||
|
||||
#include <boost/scoped_array.hpp>
|
||||
|
||||
#include "gtkmm2ext/utils.h"
|
||||
|
||||
#include "pbd/compose.h"
|
||||
|
|
@ -69,15 +67,14 @@ WaveView::WaveView (Group* parent, boost::shared_ptr<ARDOUR::AudioRegion> region
|
|||
, _gradient_depth_independent (false)
|
||||
, _amplitude_above_axis (1.0)
|
||||
, _region_start (region->start())
|
||||
, _cache (0)
|
||||
, _sample_start (-1)
|
||||
, _sample_end (-1)
|
||||
{
|
||||
VisualPropertiesChanged.connect_same_thread (invalidation_connection, boost::bind (&WaveView::handle_visual_property_change, this));
|
||||
}
|
||||
|
||||
WaveView::~WaveView ()
|
||||
{
|
||||
delete _cache;
|
||||
_cache = 0;
|
||||
}
|
||||
|
||||
void
|
||||
|
|
@ -101,7 +98,7 @@ WaveView::handle_visual_property_change ()
|
|||
}
|
||||
|
||||
if (changed) {
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -109,7 +106,7 @@ void
|
|||
WaveView::set_fill_color (Color c)
|
||||
{
|
||||
if (c != _fill_color) {
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
Fill::set_fill_color (c);
|
||||
}
|
||||
}
|
||||
|
|
@ -118,7 +115,7 @@ void
|
|||
WaveView::set_outline_color (Color c)
|
||||
{
|
||||
if (c != _outline_color) {
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
Outline::set_outline_color (c);
|
||||
}
|
||||
}
|
||||
|
|
@ -135,7 +132,7 @@ WaveView::set_samples_per_pixel (double samples_per_pixel)
|
|||
|
||||
end_change ();
|
||||
|
||||
invalidate_whole_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -151,54 +148,204 @@ window_to_image (double wave_origin, double image_start)
|
|||
return image_start - wave_origin;
|
||||
}
|
||||
|
||||
void
|
||||
WaveView::ensure_cache (framecnt_t start, framecnt_t end,
|
||||
framepos_t sample_start, framepos_t sample_end) const
|
||||
static inline float
|
||||
_log_meter (float power, double lower_db, double upper_db, double non_linearity)
|
||||
{
|
||||
if (_cache && _cache->sample_start() <= sample_start && _cache->sample_end() >= sample_end) {
|
||||
/* cache already covers required range, do nothing */
|
||||
return;
|
||||
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 clipped;
|
||||
|
||||
LineTips() : top (0.0), bot (0.0), clipped (false) {}
|
||||
};
|
||||
|
||||
void
|
||||
WaveView::draw_image (PeakData* _peaks, int n_peaks) const
|
||||
{
|
||||
_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, n_peaks, _height);
|
||||
|
||||
Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (_image);
|
||||
|
||||
boost::scoped_array<LineTips> tips (new LineTips[n_peaks]);
|
||||
|
||||
if (_shape == WaveView::Rectified) {
|
||||
|
||||
/* each peak is a line from the bottom of the waveview
|
||||
* to a point determined by max (_peaks[i].max,
|
||||
* _peaks[i].min)
|
||||
*/
|
||||
|
||||
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)))));
|
||||
}
|
||||
} 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)));
|
||||
}
|
||||
}
|
||||
|
||||
} else {
|
||||
|
||||
if (_logscaled) {
|
||||
for (int i = 0; i < n_peaks; ++i) {
|
||||
Coord top = _peaks[i].min;
|
||||
Coord bot = _peaks[i].max;
|
||||
|
||||
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) {
|
||||
tips[i].top = position (_peaks[i].min);
|
||||
tips[i].bot = position (_peaks[i].max);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (_cache) {
|
||||
delete _cache;
|
||||
_cache = 0;
|
||||
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 */
|
||||
|
||||
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.
|
||||
*/
|
||||
|
||||
context->set_source_rgba (0, 0, 0, 1.0);
|
||||
|
||||
for (int i = 0; i < n_peaks; ++i) {
|
||||
context->move_to (i, tips[i].top);
|
||||
context->rel_line_to (0, 1.0);
|
||||
context->stroke ();
|
||||
if (_shape != WaveView::Rectified) {
|
||||
context->move_to (i, tips[i].bot);
|
||||
context->rel_line_to (0, -1.0);
|
||||
context->stroke ();
|
||||
}
|
||||
}
|
||||
|
||||
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::ensure_cache (framepos_t start, framepos_t end) const
|
||||
{
|
||||
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
|
||||
*/
|
||||
|
||||
const framepos_t center = sample_start + ((sample_end - sample_start) / 2);
|
||||
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
|
||||
*/
|
||||
|
||||
sample_start = max ((framepos_t) 0, (center - canvas_samples));
|
||||
sample_end = min (center + canvas_samples, _region->source_length (0));
|
||||
_sample_start = max ((framepos_t) 0, (center - canvas_samples));
|
||||
_sample_end = min (center + canvas_samples, _region->source_length (0));
|
||||
|
||||
#if 0
|
||||
if (sample_end <= sample_start) {
|
||||
cerr << "sample start = " << sample_start << endl;
|
||||
cerr << "center+ = " << center<< endl;
|
||||
cerr << "CS = " << canvas_samples << endl;
|
||||
cerr << "pui = " << center + canvas_samples << endl;
|
||||
cerr << "sl = " << _region->source_length (0) << endl;
|
||||
cerr << "st = " << _region->start () << endl;
|
||||
cerr << "END: " << sample_end << endl;
|
||||
assert (false);
|
||||
}
|
||||
#endif
|
||||
|
||||
start = floor (sample_start / (double) _samples_per_pixel);
|
||||
end = ceil (sample_end / (double) _samples_per_pixel);
|
||||
|
||||
assert (end > start);
|
||||
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);
|
||||
|
||||
// cerr << name << " cache miss - new CE, span " << start << " .. " << end << " (" << sample_start << " .. " << sample_end << ")\n";
|
||||
boost::scoped_array<ARDOUR::PeakData> peaks (new PeakData[n_peaks]);
|
||||
|
||||
_cache = new CacheEntry (this, start, end, sample_start, sample_end);
|
||||
_region->read_peaks (peaks.get(), n_peaks,
|
||||
_sample_start, _sample_end - _sample_start,
|
||||
_channel,
|
||||
_samples_per_pixel);
|
||||
|
||||
draw_image (peaks.get(), n_peaks);
|
||||
}
|
||||
|
||||
void
|
||||
|
|
@ -246,13 +393,13 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons
|
|||
|
||||
// cerr << "Sample space: " << sample_start << " .. " << sample_end << endl;
|
||||
|
||||
ensure_cache (image_start, image_end, sample_start, sample_end);
|
||||
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 = (_cache->sample_start() - _region->start()) / _samples_per_pixel;
|
||||
double image_offset = (_sample_start - _region->start()) / _samples_per_pixel;
|
||||
|
||||
// cerr << "Offset into image to place at zero: " << image_offset << endl;
|
||||
|
||||
|
|
@ -269,7 +416,7 @@ WaveView::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons
|
|||
y = round (y);
|
||||
context->device_to_user (x, y);
|
||||
|
||||
context->set_source (_cache->image(), x, y);
|
||||
context->set_source (_image, x, y);
|
||||
context->fill ();
|
||||
}
|
||||
|
||||
|
|
@ -296,7 +443,7 @@ WaveView::set_height (Distance height)
|
|||
_bounding_box_dirty = true;
|
||||
end_change ();
|
||||
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -311,38 +458,36 @@ WaveView::set_channel (int channel)
|
|||
_bounding_box_dirty = true;
|
||||
end_change ();
|
||||
|
||||
invalidate_whole_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
WaveView::invalidate_whole_cache ()
|
||||
WaveView::invalidate_image ()
|
||||
{
|
||||
begin_visual_change ();
|
||||
delete _cache;
|
||||
_cache = 0;
|
||||
|
||||
_image.clear ();
|
||||
_sample_start = -1;
|
||||
_sample_end = -1;
|
||||
|
||||
end_visual_change ();
|
||||
}
|
||||
|
||||
void
|
||||
WaveView::invalidate_image_cache ()
|
||||
{
|
||||
invalidate_whole_cache ();
|
||||
}
|
||||
|
||||
void
|
||||
WaveView::set_logscaled (bool yn)
|
||||
{
|
||||
if (_logscaled != yn) {
|
||||
_logscaled = yn;
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
WaveView::gain_changed ()
|
||||
{
|
||||
invalidate_whole_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
|
||||
void
|
||||
|
|
@ -350,7 +495,7 @@ WaveView::set_zero_color (Color c)
|
|||
{
|
||||
if (_zero_color != c) {
|
||||
_zero_color = c;
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -359,7 +504,7 @@ WaveView::set_clip_color (Color c)
|
|||
{
|
||||
if (_clip_color != c) {
|
||||
_clip_color = c;
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -368,7 +513,7 @@ WaveView::set_show_zero_line (bool yn)
|
|||
{
|
||||
if (_show_zero != yn) {
|
||||
_show_zero = yn;
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -377,7 +522,7 @@ WaveView::set_shape (Shape s)
|
|||
{
|
||||
if (_shape != s) {
|
||||
_shape = s;
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -386,7 +531,7 @@ WaveView::set_amplitude_above_axis (double a)
|
|||
{
|
||||
if (_amplitude_above_axis != a) {
|
||||
_amplitude_above_axis = a;
|
||||
invalidate_image_cache ();
|
||||
invalidate_image ();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -429,349 +574,22 @@ WaveView::region_resized ()
|
|||
end_change ();
|
||||
}
|
||||
|
||||
WaveView::CacheEntry::CacheEntry (WaveView const * wave_view, double pixel_start, double pixel_end,
|
||||
framepos_t sample_start,framepos_t sample_end)
|
||||
: _wave_view (wave_view)
|
||||
, _pixel_start (pixel_start)
|
||||
, _pixel_end (pixel_end)
|
||||
, _sample_start (sample_start)
|
||||
, _sample_end (sample_end)
|
||||
, _n_peaks (_pixel_end - _pixel_start)
|
||||
{
|
||||
_peaks.reset (new PeakData[_n_peaks]);
|
||||
|
||||
_wave_view->_region->read_peaks (_peaks.get(), _n_peaks,
|
||||
_sample_start, _sample_end - _sample_start,
|
||||
_wave_view->_channel,
|
||||
_wave_view->_samples_per_pixel);
|
||||
}
|
||||
|
||||
WaveView::CacheEntry::~CacheEntry ()
|
||||
{
|
||||
}
|
||||
|
||||
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 clipped;
|
||||
|
||||
LineTips() : top (0.0), bot (0.0), clipped (false) {}
|
||||
};
|
||||
|
||||
Cairo::RefPtr<Cairo::ImageSurface>
|
||||
WaveView::CacheEntry::image ()
|
||||
{
|
||||
if (!_image) {
|
||||
|
||||
_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, _n_peaks, _wave_view->_height);
|
||||
Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (_image);
|
||||
|
||||
#ifdef AREA_DRAW_AND_FILL
|
||||
|
||||
/* 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 (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 (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) {
|
||||
y = position (alt_log_meter (fast_coefficient_to_dB (y)));
|
||||
} else if (y < 0.0) {
|
||||
y = position (-alt_log_meter (fast_coefficient_to_dB (-y)));
|
||||
} else {
|
||||
y = position (0.0);
|
||||
}
|
||||
context->line_to (i + 0.5, y);
|
||||
}
|
||||
} else {
|
||||
for (int i = 0; i < _n_peaks; ++i) {
|
||||
context->line_to (i + 0.5, position (_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 (alt_log_meter (fast_coefficient_to_dB (y))));
|
||||
} else if (y < 0.0) {
|
||||
context->line_to (i + 0.5, position (-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 (_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 (_wave_view->gradient_depth() != 0.0) {
|
||||
|
||||
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 *= 1.0 - _wave_view->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, _wave_view->_fill_color);
|
||||
}
|
||||
|
||||
context->fill_preserve ();
|
||||
_wave_view->setup_outline_context (context);
|
||||
context->stroke ();
|
||||
|
||||
#else
|
||||
boost::scoped_array<LineTips> tips (new LineTips[_n_peaks]);
|
||||
|
||||
if (_wave_view->_shape == WaveView::Rectified) {
|
||||
|
||||
/* each peak is a line from the bottom of the waveview
|
||||
* to a point determined by max (_peaks[i].max,
|
||||
* _peaks[i].min)
|
||||
*/
|
||||
|
||||
if (_wave_view->_logscaled) {
|
||||
for (int i = 0; i < _n_peaks; ++i) {
|
||||
tips[i].bot = _wave_view->height();
|
||||
tips[i].top = position (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) {
|
||||
tips[i].bot = _wave_view->height();
|
||||
tips[i].top = position (max (fabs (_peaks[i].max), fabs (_peaks[i].min)));
|
||||
}
|
||||
}
|
||||
|
||||
} else {
|
||||
|
||||
if (_wave_view->_logscaled) {
|
||||
for (int i = 0; i < _n_peaks; ++i) {
|
||||
Coord top = _peaks[i].min;
|
||||
Coord bot = _peaks[i].max;
|
||||
|
||||
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) {
|
||||
tips[i].top = position (_peaks[i].min);
|
||||
tips[i].bot = position (_peaks[i].max);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (_wave_view->gradient_depth() != 0.0) {
|
||||
|
||||
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);
|
||||
/* change v towards white */
|
||||
v *= 1.0 - _wave_view->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, _wave_view->_fill_color);
|
||||
}
|
||||
|
||||
/* ensure single-pixel lines */
|
||||
|
||||
context->set_line_width (0.5);
|
||||
context->translate (0.5, 0.0);
|
||||
|
||||
/* draw the lines */
|
||||
|
||||
if (_wave_view->_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.
|
||||
*/
|
||||
|
||||
context->set_source_rgba (0, 0, 0, 1.0);
|
||||
|
||||
for (int i = 0; i < _n_peaks; ++i) {
|
||||
context->move_to (i, tips[i].top);
|
||||
context->rel_line_to (0, 1.0);
|
||||
context->stroke ();
|
||||
if (_wave_view->_shape != WaveView::Rectified) {
|
||||
context->move_to (i, tips[i].bot);
|
||||
context->rel_line_to (0, -1.0);
|
||||
context->stroke ();
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
|
||||
Coord
|
||||
WaveView::CacheEntry::position (double s) const
|
||||
WaveView::position (double s) const
|
||||
{
|
||||
/* it is important that this returns an integral value, so that we
|
||||
can ensure correct single pixel behaviour.
|
||||
*/
|
||||
|
||||
switch (_wave_view->_shape) {
|
||||
switch (_shape) {
|
||||
case Rectified:
|
||||
return floor (_wave_view->_height - (s * _wave_view->_height));
|
||||
return floor (_height - (s * _height));
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return floor ((1.0-s) * (_wave_view->_height / 2.0));
|
||||
return floor ((1.0-s) * (_height / 2.0));
|
||||
}
|
||||
|
||||
void
|
||||
WaveView::CacheEntry::clear_image ()
|
||||
{
|
||||
_image.clear ();
|
||||
}
|
||||
|
||||
void
|
||||
WaveView::set_global_gradient_depth (double depth)
|
||||
{
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue