gtk2_ardour/meter_patterns.cc

   1 /*
   2     Copyright (C) 2013 Paul Davis
   3     Author: Robin Gareus
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include <gtkmm2ext/cairo_widget.h>
  21 #include <gtkmm2ext/gtk_ui.h>
  22 #include <gtkmm2ext/utils.h>
  23 #include <gtkmm2ext/rgb_macros.h>
  24
  25 #include <ardour/rc_configuration.h>
  26 #include "ardour_ui.h"
  27 #include "utils.h"
  28 #include "logmeter.h"
  29 #include "meter_patterns.h"
  30
  31 #include "i18n.h"
  32
  33 using namespace ARDOUR;
  34 using namespace PBD;
  35 using namespace Gtk;
  36 using namespace Gtkmm2ext;
  37 using namespace std;
  38 using namespace ArdourMeter;
  39
  40 static const int max_pattern_metric_size = 1026;
  41
  42 /* signals used by meters */
  43
  44 sigc::signal<void> ArdourMeter::ResetAllPeakDisplays;
  45 sigc::signal<void,ARDOUR::Route*> ArdourMeter::ResetRoutePeakDisplays;
  46 sigc::signal<void,ARDOUR::RouteGroup*> ArdourMeter::ResetGroupPeakDisplays;
  47 sigc::signal<void> ArdourMeter::RedrawMetrics;
  48
  49 sigc::signal<void, int, ARDOUR::RouteGroup*, ARDOUR::MeterType> ArdourMeter::SetMeterTypeMulti;
  50
  51
  52 /* pattern cache */
  53
  54 struct MeterMatricsMapKey {
  55         MeterMatricsMapKey (std::string n, MeterType t, int dt)
  56                 : _n(n)
  57                 , _t(t)
  58                 , _dt(dt)
  59         {}
  60         inline bool operator<(const MeterMatricsMapKey& rhs) const {
  61                 return (_n < rhs._n) || (_n == rhs._n && _t < rhs._t) || (_n == rhs._n && _t == rhs._t && _dt < rhs._dt);
  62         }
  63         std::string _n;
  64         MeterType _t;
  65         int _dt;
  66 };
  67
  68 namespace ArdourMeter {
  69         typedef std::map<MeterMatricsMapKey, cairo_pattern_t*> MetricPatternMap;
  70 }
  71
  72 static ArdourMeter::MetricPatternMap ticks_patterns;
  73 static ArdourMeter::MetricPatternMap metric_patterns;
  74
  75
  76 const std::string
  77 ArdourMeter::meter_type_string (ARDOUR::MeterType mt)
  78 {
  79         switch (mt) {
  80                 case MeterPeak:
  81                         return _("Peak");
  82                         break;
  83                 case MeterKrms:
  84                         return _("RMS + Peak");
  85                         break;
  86                 case MeterIEC1DIN:
  87                         return _("IEC1/DIN");
  88                         break;
  89                 case MeterIEC1NOR:
  90                         return _("IEC1/Nordic");
  91                         break;
  92                 case MeterIEC2BBC:
  93                         return _("IEC2/BBC");
  94                         break;
  95                 case MeterIEC2EBU:
  96                         return _("IEC2/EBU");
  97                         break;
  98                 case MeterK20:
  99                         return _("K20");
 100                         break;
 101                 case MeterK14:
 102                         return _("K14");
 103                         break;
 104                 case MeterVU:
 105                         return _("VU");
 106                         break;
 107                 default:
 108                         return _("???");
 109                         break;
 110         }
 111 }
 112
 113 static inline int types_to_bit (vector<ARDOUR::DataType> types) {
 114         int rv = 0;
 115         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 116                 rv |= 1 << (*i);
 117         }
 118         return rv;
 119 }
 120
 121 static inline float mtr_col_and_fract(
 122                 cairo_t* cr, Gdk::Color const * const c, const uint32_t peakcolor, const MeterType mt, const float val)
 123 {
 124         float fraction = 0;
 125
 126         switch (mt) {
 127                 default:
 128                 case MeterKrms:
 129                 case MeterPeak:
 130                         fraction = log_meter (val);
 131                         if (val >= 0 || val == -9) {
 132                                 cairo_set_source_rgb (cr,
 133                                                 UINT_RGBA_R_FLT(peakcolor),
 134                                                 UINT_RGBA_G_FLT(peakcolor),
 135                                                 UINT_RGBA_B_FLT(peakcolor));
 136                         } else {
 137                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 138                         }
 139                         break;
 140                 case MeterIEC2BBC:
 141                 case MeterIEC2EBU:
 142                         fraction = meter_deflect_ppm(val);
 143                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 144                         break;
 145                 case MeterIEC1NOR:
 146                         fraction = meter_deflect_nordic(val);
 147 #if 0
 148                         if (val == -18.0) {
 149                                 cairo_set_source_rgb (cr,
 150                                                 UINT_RGBA_R_FLT(peakcolor),
 151                                                 UINT_RGBA_G_FLT(peakcolor),
 152                                                 UINT_RGBA_B_FLT(peakcolor));
 153                         } else {
 154                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 155                         }
 156 #else
 157                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 158 #endif
 159                         break;
 160                 case MeterIEC1DIN:
 161                         fraction = meter_deflect_din(val);
 162                         if (val == -9.0 || val == -15 || val == -18) {
 163                                 cairo_set_source_rgb (cr,
 164                                                 UINT_RGBA_R_FLT(peakcolor),
 165                                                 UINT_RGBA_G_FLT(peakcolor),
 166                                                 UINT_RGBA_B_FLT(peakcolor));
 167                         } else {
 168                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 169                         }
 170                         break;
 171                 case MeterVU:
 172                         fraction = meter_deflect_vu(val);
 173                         if (val >= -20.0) {
 174                                 cairo_set_source_rgb (cr,
 175                                                 UINT_RGBA_R_FLT(peakcolor),
 176                                                 UINT_RGBA_G_FLT(peakcolor),
 177                                                 UINT_RGBA_B_FLT(peakcolor));
 178                         } else {
 179                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 180                         }
 181                         break;
 182                 case MeterK20:
 183                         fraction = meter_deflect_k (val, 20);
 184                         if (val >= -16.0) {
 185                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 186                         } else if (val >= -20.0) {
 187                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 188                         } else {
 189                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 190                         }
 191                         break;
 192                 case MeterK14:
 193                         if (val >= -10.0) {
 194                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 195                         } else if (val >= -14.0) {
 196                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 197                         } else {
 198                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 199                         }
 200                         fraction = meter_deflect_k (val, 14);
 201                         break;
 202         }
 203         return fraction;
 204 }
 205
 206 static void mtr_red_stripe(cairo_t* cr, float l, float w, int h, float top, float bot) {
 207         if (w <= 0) return;
 208         int t = h - floorf (h * (top));
 209         int b = h - floorf (h * (bot));
 210         cairo_set_source_rgba (cr, .75, 0, 0, 0.75);
 211         cairo_rectangle (cr, l, t + .5, w, b - t);
 212         cairo_fill (cr);
 213 }
 214
 215 static void set_bg_color(Gtk::Widget& w, cairo_t* cr, MeterType type) {
 216         float r,g,b;
 217         switch(type) {
 218                 case MeterVU:
 219                         if (rgba_p_from_style("meterstripVU", &r, &g, &b, "bg")) {
 220                                 cairo_set_source_rgb (cr, r, g, b);
 221                         } else {
 222                                 cairo_set_source_rgb (cr, 1.0, 1.0, 0.85);
 223                         }
 224                         break;
 225                 case MeterIEC1DIN:
 226                 case MeterIEC1NOR:
 227                 case MeterIEC2BBC:
 228                 case MeterIEC2EBU:
 229                 case MeterK14:
 230                 case MeterK20:
 231                         if (rgba_p_from_style("meterstripPPM", &r, &g, &b, "bg")) {
 232                                 cairo_set_source_rgb (cr, r, g, b);
 233                         } else {
 234                                 cairo_set_source_rgb (cr, 0.1, 0.1, 0.1);
 235                         }
 236                         break;
 237                 default:
 238                         {
 239                         Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_ACTIVE);
 240                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 241                         }
 242                         break;
 243         }
 244 }
 245
 246 static void set_fg_color(Gtk::Widget& w, MeterType type, Gdk::Color * c) {
 247         float r,g,b;
 248         switch(type) {
 249                 case MeterVU:
 250                         if (rgba_p_from_style("meterstripVU", &r, &g, &b)) {
 251                                 c->set_rgb_p(r, g, b);
 252                         } else {
 253                                 c->set_rgb_p(0.0, 0.0, 0.0);
 254                         }
 255                         break;
 256                 default:
 257                         if (rgba_p_from_style("meterstripPPM", &r, &g, &b)) {
 258                                 c->set_rgb_p(r, g, b);
 259                         } else {
 260                                 c->set_rgb_p(1.0, 1.0, 1.0);
 261                         }
 262                         break;
 263         }
 264 }
 265
 266 static cairo_pattern_t*
 267 meter_render_ticks (Gtk::Widget& w, MeterType type, vector<ARDOUR::DataType> types)
 268 {
 269         Glib::RefPtr<Gdk::Window> win (w.get_window());
 270
 271         bool background;
 272         bool tickleft, tickright;
 273         gint width, height;
 274         win->get_size (width, height);
 275         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 276         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 277         background = types.size() == 0 || tickleft || tickright;
 278
 279         float box_l=0;
 280         float box_w=0;
 281         if (tickleft) {
 282                 if (w.get_name().substr(0, 3) == "Bar") {
 283                         box_l = width-2; box_w = 2;
 284                 }
 285         } else if (tickright) {
 286                 if (w.get_name().substr(0, 3) == "Bar") {
 287                         box_l = 0; box_w = 2;
 288                 }
 289         } else {
 290                 box_l = 0; box_w = 3;
 291         }
 292
 293         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 294         cairo_t* cr = cairo_create (surface);
 295
 296         cairo_move_to (cr, 0, 0);
 297         cairo_rectangle (cr, 0, 0, width, height);
 298
 299         if (background) {
 300                 /* meterbridge */
 301                 set_bg_color(w, cr, type);
 302         } else {
 303                 /* mixer */
 304                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 305                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 306         }
 307         cairo_fill (cr);
 308
 309         height = min(max_pattern_metric_size, height);
 310         uint32_t peakcolor = ARDOUR_UI::config()->color_by_name ("meterbridge peaklabel");
 311
 312         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 313
 314                 Gdk::Color c;
 315                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 316                         /* we're overlaying more than 1 set of marks, so use different colours */
 317                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 318                 } else if (background) {
 319                         set_fg_color(w, type, &c);
 320                 } else {
 321                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 322                 }
 323
 324                 // tick-maker position in dBFS, line-thickness
 325                 std::map<float,float> points;
 326
 327                 switch (*i) {
 328                 case DataType::AUDIO:
 329
 330                         switch (type) {
 331                                 case MeterK14:
 332                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 333                                         points.insert (std::pair<float,float>(-44.0f, 1.0));
 334                                         points.insert (std::pair<float,float>(-34.0f, 1.0));
 335                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 336                                         points.insert (std::pair<float,float>(-20.0f, 1.0));
 337                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 338                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 339                                         points.insert (std::pair<float,float>(-11.0f, 1.0));
 340                                         points.insert (std::pair<float,float>( -8.0f, 1.0));
 341                                         points.insert (std::pair<float,float>( -4.0f, 1.0));
 342                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 343                                         break;
 344                                 case MeterK20:
 345                                         points.insert (std::pair<float,float>(-60.0f, 1.0));
 346                                         points.insert (std::pair<float,float>(-50.0f, 1.0));
 347                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 348                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 349                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 350                                         points.insert (std::pair<float,float>(-23.0f, 1.0));
 351                                         points.insert (std::pair<float,float>(-20.0f, 1.0));
 352                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 353                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 354                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 355                                         points.insert (std::pair<float,float>( -5.0f, 1.0));
 356                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 357                                         break;
 358                                 case MeterIEC2EBU:
 359                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 360                                         points.insert (std::pair<float,float>(-28.0f, 0.5));
 361                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 362                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 363                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 364                                         points.insert (std::pair<float,float>(-20.0f, 0.5));
 365                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 366                                         points.insert (std::pair<float,float>(-16.0f, 0.5));
 367                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 368                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 369                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 370                                         points.insert (std::pair<float,float>( -9.0f, 0.8));
 371                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 372                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 373                                         break;
 374                                 case MeterIEC2BBC:
 375                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 376                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 377                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 378                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 379                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 380                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 381                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 382                                         break;
 383                                 case MeterIEC1NOR:
 384                                         points.insert (std::pair<float,float>(-60.0f, 1.0)); // -42
 385                                         points.insert (std::pair<float,float>(-57.0f, 0.5));
 386                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 387                                         points.insert (std::pair<float,float>(-51.0f, 0.5));
 388                                         points.insert (std::pair<float,float>(-48.0f, 1.0));
 389                                         points.insert (std::pair<float,float>(-45.0f, 0.5));
 390                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 391                                         points.insert (std::pair<float,float>(-39.0f, 0.5));
 392                                         points.insert (std::pair<float,float>(-36.0f, 1.0));
 393
 394                                         points.insert (std::pair<float,float>(-33.0f, 0.5));
 395                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 396                                         points.insert (std::pair<float,float>(-27.0f, 0.5));
 397                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 398                                         points.insert (std::pair<float,float>(-21.0f, 0.5));
 399
 400                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 401                                         points.insert (std::pair<float,float>(-15.0f, 0.5));
 402                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 403                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 404                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 405                                         mtr_red_stripe(cr, box_l, box_w, height,
 406                                                         meter_deflect_nordic(-6.0f), meter_deflect_nordic(-12.0f));
 407                                         break;
 408                                 case MeterIEC1DIN:
 409                                         points.insert (std::pair<float,float>( -3.0f, 0.5)); // "200%"
 410                                         points.insert (std::pair<float,float>( -4.0f, 1.0));
 411                                         points.insert (std::pair<float,float>( -5.0f, 0.5));
 412                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 413                                         points.insert (std::pair<float,float>( -7.0f, 0.5));
 414                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 415                                         points.insert (std::pair<float,float>( -9.0f, 1.0)); // "100%"
 416                                         points.insert (std::pair<float,float>(-10.0f, 0.5));
 417                                         points.insert (std::pair<float,float>(-11.0f, 0.5));
 418                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 419                                         points.insert (std::pair<float,float>(-13.0f, 0.5));
 420                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 421                                         points.insert (std::pair<float,float>(-15.0f, 0.8)); // "50%"
 422                                         points.insert (std::pair<float,float>(-18.0f, 0.8)); // "-9"
 423                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 424                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 425                                         points.insert (std::pair<float,float>(-29.0f, 1.0)); // "-20", "10%"
 426                                         points.insert (std::pair<float,float>(-34.0f, 0.5)); // -25
 427                                         //points.insert (std::pair<float,float>(-35.0f, 0.5)); // "5%" " -20"
 428                                         points.insert (std::pair<float,float>(-39.0f, 1.0));
 429                                         points.insert (std::pair<float,float>(-49.0f, 1.0));
 430                                         points.insert (std::pair<float,float>(-54.0f, 0.5));
 431                                         points.insert (std::pair<float,float>(-59.0f, 1.0));
 432                                         mtr_red_stripe(cr, box_l, box_w, height,
 433                                                         meter_deflect_din(0.0f), meter_deflect_din(-9.0f));
 434                                         break;
 435                                 case MeterVU:
 436                                         points.insert (std::pair<float,float>(-17.0f, 1.0)); //+3 VU
 437                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 438                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 439                                         points.insert (std::pair<float,float>(-19.5f, 0.5));
 440                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); // 0 VU
 441                                         points.insert (std::pair<float,float>(-20.5f, 0.5));
 442                                         points.insert (std::pair<float,float>(-21.0f, 1.0));
 443                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 444                                         points.insert (std::pair<float,float>(-23.0f, 1.0)); //-3 VU
 445                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 446                                         points.insert (std::pair<float,float>(-25.0f, 1.0));
 447                                         points.insert (std::pair<float,float>(-26.0f, 0.5));
 448                                         points.insert (std::pair<float,float>(-27.0f, 1.0)); //-7 VU
 449                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 450                                         points.insert (std::pair<float,float>(-35.0f, 0.5));
 451                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 452                                         mtr_red_stripe(cr, box_l, box_w, height,
 453                                                         meter_deflect_vu(-17.0f), meter_deflect_vu(-20.0f));
 454                                         break;
 455
 456                                 default:
 457                                         points.insert (std::pair<float,float>(-60, 0.5));
 458                                         points.insert (std::pair<float,float>(-50, 1.0));
 459                                         points.insert (std::pair<float,float>(-40, 1.0));
 460                                         points.insert (std::pair<float,float>(-30, 1.0));
 461                                         if (Config->get_meter_line_up_level() == MeteringLineUp24) {
 462                                                 points.insert (std::pair<float,float>(-24, 1.0));
 463                                         } else {
 464                                                 points.insert (std::pair<float,float>(-25, 1.0));
 465                                         }
 466                                         points.insert (std::pair<float,float>(-20, 1.0));
 467
 468                                         points.insert (std::pair<float,float>(-19, 0.5));
 469                                         points.insert (std::pair<float,float>(-18, 1.0));
 470                                         points.insert (std::pair<float,float>(-17, 0.5));
 471                                         points.insert (std::pair<float,float>(-16, 0.5));
 472                                         points.insert (std::pair<float,float>(-15, 1.0));
 473
 474                                         points.insert (std::pair<float,float>(-14, 0.5));
 475                                         points.insert (std::pair<float,float>(-13, 0.5));
 476                                         points.insert (std::pair<float,float>(-12, 0.5));
 477                                         points.insert (std::pair<float,float>(-11, 0.5));
 478                                         points.insert (std::pair<float,float>(-10, 1.0));
 479
 480                                         points.insert (std::pair<float,float>( -9, 1.0));
 481                                         points.insert (std::pair<float,float>( -8, 0.5));
 482                                         points.insert (std::pair<float,float>( -7, 0.5));
 483                                         points.insert (std::pair<float,float>( -6, 0.5));
 484                                         points.insert (std::pair<float,float>( -5, 1.0));
 485                                         points.insert (std::pair<float,float>( -4, 0.5));
 486                                         points.insert (std::pair<float,float>( -3, 1.0));
 487                                         points.insert (std::pair<float,float>( -2, 0.5));
 488                                         points.insert (std::pair<float,float>( -1, 0.5));
 489
 490                                         points.insert (std::pair<float,float>(  0, 1.0));
 491                                         points.insert (std::pair<float,float>(  1, 0.5));
 492                                         points.insert (std::pair<float,float>(  2, 0.5));
 493                                         points.insert (std::pair<float,float>(  3, 1.0));
 494                                         points.insert (std::pair<float,float>(  4, 0.5));
 495                                         points.insert (std::pair<float,float>(  5, 0.5));
 496                                         break;
 497                         }
 498                         break;
 499
 500                 case DataType::MIDI:
 501                         points.insert (std::pair<float,float>(  0, 1.0));
 502                         points.insert (std::pair<float,float>( 16, 0.5));
 503                         points.insert (std::pair<float,float>( 32, 0.5));
 504                         points.insert (std::pair<float,float>( 48, 0.5));
 505                         points.insert (std::pair<float,float>( 64, 1.0));
 506                         points.insert (std::pair<float,float>( 80, 0.5));
 507                         points.insert (std::pair<float,float>( 96, 0.5));
 508                         points.insert (std::pair<float,float>(100, 1.0));
 509                         points.insert (std::pair<float,float>(112, 0.5));
 510                         points.insert (std::pair<float,float>(127, 1.0));
 511                         break;
 512                 }
 513
 514                 for (std::map<float,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
 515                         cairo_set_line_width (cr, (j->second));
 516
 517                         float fraction = 0;
 518                         gint pos;
 519
 520                         switch (*i) {
 521                         case DataType::AUDIO:
 522                                 fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 523
 524                                 pos = height - (gint) floor (height * fraction);
 525                                 pos = max (pos, 1);
 526                                 cairo_move_to(cr, 0, pos + .5);
 527                                 cairo_line_to(cr, 3, pos + .5);
 528                                 cairo_stroke (cr);
 529                                 break;
 530                         case DataType::MIDI:
 531                                 fraction = (j->first) / 127.0;
 532                                 pos = 1 + height - (gint) floor (height * fraction);
 533                                 pos = min (pos, height);
 534                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 535                                 cairo_arc(cr, 1.5, pos + .5, 1.0, 0, 2 * M_PI);
 536                                 cairo_fill(cr);
 537                                 break;
 538                         }
 539                 }
 540         }
 541
 542         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 543
 544         cairo_destroy (cr);
 545         cairo_surface_destroy (surface);
 546
 547         return pattern;
 548 }
 549
 550 static cairo_pattern_t*
 551 meter_render_metrics (Gtk::Widget& w, MeterType type, vector<DataType> types)
 552 {
 553         Glib::RefPtr<Gdk::Window> win (w.get_window());
 554
 555         bool tickleft, tickright;
 556         bool background;
 557         int overlay_midi = 1;
 558         gint width, height;
 559         win->get_size (width, height);
 560
 561         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 562         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 563         background = types.size() == 0 || tickleft || tickright;
 564
 565         if (!tickleft && !tickright) {
 566                 tickright = true;
 567         }
 568
 569         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 570         cairo_t* cr = cairo_create (surface);
 571         Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
 572
 573         Pango::AttrList audio_font_attributes;
 574         Pango::AttrList midi_font_attributes;
 575         Pango::AttrList unit_font_attributes;
 576
 577         Pango::AttrFontDesc* font_attr;
 578         Pango::FontDescription font;
 579
 580         font = Pango::FontDescription ("ArdourMono");
 581         double fixfontsize = 81920.0 / (double) ARDOUR::Config->get_font_scale();
 582
 583         font.set_weight (Pango::WEIGHT_NORMAL);
 584         font.set_size (9.0 * PANGO_SCALE * fixfontsize);
 585         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 586         audio_font_attributes.change (*font_attr);
 587         delete font_attr;
 588
 589         font.set_weight (Pango::WEIGHT_ULTRALIGHT);
 590         font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
 591         font.set_size (8.0 * PANGO_SCALE * fixfontsize);
 592         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 593         midi_font_attributes.change (*font_attr);
 594         delete font_attr;
 595
 596         font.set_size (6.0 * PANGO_SCALE * fixfontsize);
 597         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 598         unit_font_attributes.change (*font_attr);
 599         delete font_attr;
 600
 601         cairo_move_to (cr, 0, 0);
 602         cairo_rectangle (cr, 0, 0, width, height);
 603         if (background) {
 604                 /* meterbridge */
 605                 set_bg_color(w, cr, type);
 606         } else {
 607                 /* mixer */
 608                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 609                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 610         }
 611         cairo_fill (cr);
 612
 613         cairo_set_line_width (cr, 1.0);
 614
 615         height = min(max_pattern_metric_size, height);
 616         uint32_t peakcolor = ARDOUR_UI::config()->color_by_name ("meterbridge peaklabel");
 617         Gdk::Color c; // default text color
 618
 619         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 620
 621                 if (types.size() > 1 && (*i) == DataType::MIDI && overlay_midi == 0) {
 622                         continue;
 623                 }
 624
 625                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 626                         /* we're overlaying more than 1 set of marks, so use different colours */
 627                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 628                 } else if (background) {
 629                         set_fg_color(w, type, &c);
 630                 } else {
 631                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 632                 }
 633
 634                 std::map<float,string> points; // map: label-pos in dBFS, label-text
 635
 636                 switch (*i) {
 637                 case DataType::AUDIO:
 638                         layout->set_attributes (audio_font_attributes);
 639                         switch (type) {
 640                                 case MeterK14:
 641                                         overlay_midi = 0;
 642                                         points.insert (std::pair<float,string>(-54.0f, "-40"));
 643                                         points.insert (std::pair<float,string>(-44.0f, "-30"));
 644                                         points.insert (std::pair<float,string>(-34.0f, "-20"));
 645                                         points.insert (std::pair<float,string>(-24.0f, "-10"));
 646                                         points.insert (std::pair<float,string>(-20.0f,  "-6"));
 647                                         points.insert (std::pair<float,string>(-17.0f,  "-3"));
 648                                         points.insert (std::pair<float,string>(-14.0f,  " 0"));
 649                                         points.insert (std::pair<float,string>(-11.0f,  "+3"));
 650                                         points.insert (std::pair<float,string>( -8.0f,  "+6"));
 651                                         points.insert (std::pair<float,string>( -4.0f, "+10"));
 652                                         points.insert (std::pair<float,string>(  0.0f, "+14"));
 653                                         break;
 654                                 case MeterK20:
 655                                         overlay_midi = 0;
 656                                         points.insert (std::pair<float,string>(-60.0f, "-40"));
 657                                         points.insert (std::pair<float,string>(-50.0f, "-30"));
 658                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 659                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 660                                         points.insert (std::pair<float,string>(-26.0f,  "-6"));
 661                                         points.insert (std::pair<float,string>(-23.0f,  "-3"));
 662                                         points.insert (std::pair<float,string>(-20.0f,  " 0"));
 663                                         points.insert (std::pair<float,string>(-17.0f,  "+3"));
 664                                         points.insert (std::pair<float,string>(-14.0f,  "+6"));
 665                                         points.insert (std::pair<float,string>(-10.0f, "+10"));
 666                                         points.insert (std::pair<float,string>( -5.0f, "+15"));
 667                                         points.insert (std::pair<float,string>(  0.0f, "+20"));
 668                                         break;
 669                                 default:
 670                                 case MeterPeak:
 671                                 case MeterKrms:
 672                                         points.insert (std::pair<float,string>(-50.0f, "-50"));
 673                                         points.insert (std::pair<float,string>(-40.0f, "-40"));
 674                                         points.insert (std::pair<float,string>(-30.0f, "-30"));
 675                                         points.insert (std::pair<float,string>(-20.0f, "-20"));
 676                                         if (types.size() == 1) {
 677                                                 if (Config->get_meter_line_up_level() == MeteringLineUp24) {
 678                                                         points.insert (std::pair<float,string>(-24.0f, "-24"));
 679                                                 } else {
 680                                                         points.insert (std::pair<float,string>(-25.0f, "-25"));
 681                                                 }
 682                                                 points.insert (std::pair<float,string>(-15.0f, "-15"));
 683                                         }
 684                                         points.insert (std::pair<float,string>(-18.0f, "-18"));
 685                                         points.insert (std::pair<float,string>(-10.0f, "-10"));
 686                                         points.insert (std::pair<float,string>( -5.0f, "-5"));
 687                                         points.insert (std::pair<float,string>( -3.0f, "-3"));
 688                                         points.insert (std::pair<float,string>(  0.0f, "+0"));
 689                                         points.insert (std::pair<float,string>(  3.0f, "+3"));
 690                                         break;
 691
 692                                 case MeterIEC2EBU:
 693                                         overlay_midi = 3;
 694                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 695                                         points.insert (std::pair<float,string>(-26.0f, "-8"));
 696                                         points.insert (std::pair<float,string>(-22.0f, "-4"));
 697                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 698                                         points.insert (std::pair<float,string>(-14.0f, "+4"));
 699                                         points.insert (std::pair<float,string>(-10.0f, "+8"));
 700                                         points.insert (std::pair<float,string>( -6.0f, "+12"));
 701                                         break;
 702
 703                                 case MeterIEC2BBC:
 704                                         overlay_midi = 3;
 705                                         points.insert (std::pair<float,string>(-30.0f, " 1 "));
 706                                         points.insert (std::pair<float,string>(-26.0f, " 2 "));
 707                                         points.insert (std::pair<float,string>(-22.0f, " 3 "));
 708                                         points.insert (std::pair<float,string>(-18.0f, " 4 "));
 709                                         points.insert (std::pair<float,string>(-14.0f, " 5 "));
 710                                         points.insert (std::pair<float,string>(-10.0f, " 6 "));
 711                                         points.insert (std::pair<float,string>( -6.0f, " 7 "));
 712                                         break;
 713
 714                                 case MeterIEC1NOR:
 715                                         overlay_midi = 0;
 716                                         //points.insert (std::pair<float,string>(-60.0f, "-42"));
 717                                         points.insert (std::pair<float,string>(-54.0f, "-36"));
 718                                         points.insert (std::pair<float,string>(-48.0f, "-30"));
 719                                         points.insert (std::pair<float,string>(-42.0f, "-24"));
 720                                         points.insert (std::pair<float,string>(-36.0f, "-18"));
 721
 722                                         //points.insert (std::pair<float,string>(-33.0f, "-15"));
 723                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 724                                         //points.insert (std::pair<float,string>(-27.0f, "-9"));
 725                                         points.insert (std::pair<float,string>(-24.0f, "-6"));
 726                                         //points.insert (std::pair<float,string>(-21.0f, "-3"));
 727
 728                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 729                                         //points.insert (std::pair<float,string>(-15.0f, "+3"));
 730                                         points.insert (std::pair<float,string>(-12.0f, "+6"));
 731                                         points.insert (std::pair<float,string>( -9.0f, "+9"));
 732                                         //points.insert (std::pair<float,string>( -6.0f, "+12"));
 733                                         break;
 734
 735                                 case MeterIEC1DIN:
 736                                         overlay_midi = 2;
 737                                         //points.insert (std::pair<float,string>( -3.0f, "200%"));
 738                                         points.insert (std::pair<float,string>( -4.0f, "+5"));
 739                                         points.insert (std::pair<float,string>( -9.0f, "0")); // "100%";
 740                                         points.insert (std::pair<float,string>(-14.0f, "-5"));
 741                                         //points.insert (std::pair<float,string>(-15.0f, "50%"));
 742                                         //points.insert (std::pair<float,string>(-18.0f, "-9"));
 743                                         points.insert (std::pair<float,string>(-19.0f, "-10")); // "30%"
 744                                         points.insert (std::pair<float,string>(-29.0f, "-20")); // "10%"
 745                                         //points.insert (std::pair<float,string>(-35.0f, "5%")); // "5%"
 746                                         points.insert (std::pair<float,string>(-39.0f, "-30"));
 747                                         //points.insert (std::pair<float,string>(-49.0f, "1%"));
 748                                         points.insert (std::pair<float,string>(-59.0f, "-50"));
 749                                         break;
 750
 751                                 case MeterVU:
 752                                         overlay_midi = 0;
 753                                         points.insert (std::pair<float,string>(-17.0f, "+3"));
 754                                         points.insert (std::pair<float,string>(-18.0f, "+2"));
 755                                         points.insert (std::pair<float,string>(-19.0f, "+1"));
 756                                         points.insert (std::pair<float,string>(-20.0f, " 0"));
 757                                         points.insert (std::pair<float,string>(-21.0f, "-1"));
 758                                         points.insert (std::pair<float,string>(-22.0f, "-2"));
 759                                         points.insert (std::pair<float,string>(-23.0f, "-3"));
 760                                         points.insert (std::pair<float,string>(-25.0f, "-5"));
 761                                         points.insert (std::pair<float,string>(-27.0f, "-7"));
 762                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 763                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 764                                         break;
 765                         }
 766                         break;
 767                 case DataType::MIDI:
 768                         layout->set_attributes (midi_font_attributes);
 769                         if (types.size() == 1) {
 770                                 points.insert (std::pair<float,string>(  0, "0"));
 771                                 points.insert (std::pair<float,string>( 16,  "16"));
 772                                 points.insert (std::pair<float,string>( 32,  "32"));
 773                                 points.insert (std::pair<float,string>( 48,  "48"));
 774                                 points.insert (std::pair<float,string>( 64,  "64"));
 775                                 points.insert (std::pair<float,string>( 80,  "80"));
 776                                 points.insert (std::pair<float,string>( 96,  "96"));
 777                                 points.insert (std::pair<float,string>(100, "100"));
 778                                 points.insert (std::pair<float,string>(112, "112"));
 779                         } else {
 780                                 switch (overlay_midi) {
 781                                         case 1:
 782                                                 /* labels that don't overlay with dBFS */
 783                                                 points.insert (std::pair<float,string>(  0, "0"));
 784                                                 points.insert (std::pair<float,string>( 24, "24"));
 785                                                 points.insert (std::pair<float,string>( 48, "48"));
 786                                                 points.insert (std::pair<float,string>( 72, "72"));
 787                                                 points.insert (std::pair<float,string>(127, "127"));
 788                                                 break;
 789                                         case 2:
 790                                                 /* labels that don't overlay with DIN */
 791                                                 points.insert (std::pair<float,string>(  0, "0"));
 792                                                 points.insert (std::pair<float,string>( 16,  "16"));
 793                                                 points.insert (std::pair<float,string>( 40,  "40"));
 794                                                 points.insert (std::pair<float,string>( 64,  "64"));
 795                                                 points.insert (std::pair<float,string>(112, "112"));
 796                                                 points.insert (std::pair<float,string>(127, "127"));
 797                                                 break;
 798                                         case 3:
 799                                                 /* labels that don't overlay with BBC nor EBU*/
 800                                                 points.insert (std::pair<float,string>(  0, "0"));
 801                                                 points.insert (std::pair<float,string>( 16, "16"));
 802                                                 points.insert (std::pair<float,string>( 56, "56"));
 803                                                 points.insert (std::pair<float,string>( 72, "72"));
 804                                                 points.insert (std::pair<float,string>(112, "112"));
 805                                                 points.insert (std::pair<float,string>(127, "127"));
 806                                         default:
 807                                                 break;
 808                                 }
 809                         }
 810                         break;
 811                 }
 812
 813                 gint pos;
 814
 815                 for (std::map<float,string>::const_iterator j = points.begin(); j != points.end(); ++j) {
 816                         float fraction = 0;
 817                         bool align_center = background; // this is true for meterbridge meters w/ fixed background
 818                         switch (*i) {
 819                                 case DataType::AUDIO:
 820                                         fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 821
 822                                         pos = height - (gint) floor (height * fraction);
 823                                         pos = max (pos, 1);
 824                                         if (tickleft) {
 825                                                 cairo_move_to(cr, width-1.5, pos + .5);
 826                                                 cairo_line_to(cr, width, pos + .5);
 827                                                 cairo_stroke (cr);
 828                                         } else if (tickright) {
 829                                                 cairo_move_to(cr, 0, pos + .5);
 830                                                 cairo_line_to(cr, 1.5, pos + .5);
 831                                                 cairo_stroke (cr);
 832                                         }
 833                                         break;
 834
 835                                 case DataType::MIDI:
 836                                         align_center = false; // don't bleed into legend
 837                                         fraction = (j->first) / 127.0;
 838                                         pos = 1 + height - (gint) rintf (height * fraction);
 839                                         pos = min (pos, height);
 840                                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 841                                         if (tickleft) {
 842                                                 cairo_arc(cr, width - 2.0, pos + .5, 1.0, 0, 2 * M_PI);
 843                                                 cairo_fill(cr);
 844                                         } else if (tickright) {
 845                                                 cairo_arc(cr, 3, pos + .5, 1.0, 0, 2 * M_PI);
 846                                                 cairo_fill(cr);
 847                                         }
 848                                         break;
 849                         }
 850
 851                         layout->set_text(j->second.c_str());
 852
 853                         int tw, th;
 854                         layout->get_pixel_size(tw, th);
 855
 856                         int p = pos - (th / 2) - 1;
 857                         p = min (p, height - th);
 858                         p = max (p, 0);
 859
 860                         if (align_center) {
 861                                 cairo_move_to (cr, (width-tw)/2.0, p);
 862                         } else {
 863                                 cairo_move_to (cr, width-3-tw, p);
 864                         }
 865
 866                         cairo_set_line_width(cr, 0.12);
 867                         cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
 868                         pango_cairo_layout_path(cr, layout->gobj());
 869                         cairo_stroke_preserve (cr);
 870                         cairo_set_line_width(cr, 1.0);
 871
 872                         if ((*i) == DataType::AUDIO) {
 873                                 mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 874                         } else {
 875                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 876                         }
 877
 878                         pango_cairo_show_layout (cr, layout->gobj());
 879                         cairo_new_path(cr);
 880                 }
 881         }
 882
 883         // add legend
 884         if (types.size() == 1 || overlay_midi == 0) {
 885                 int tw, th;
 886                 layout->set_attributes (unit_font_attributes);
 887                 switch (types.at(0)) {
 888                         case DataType::AUDIO:
 889                                 switch (type) {
 890                                         case MeterK20:
 891                                                 layout->set_text("K20");
 892                                                 break;
 893                                         case MeterK14:
 894                                                 layout->set_text("K14");
 895                                                 break;
 896                                         default:
 897                                         case MeterPeak:
 898                                         case MeterKrms:
 899                                                 layout->set_text("dBFS");
 900                                                 break;
 901                                         case MeterIEC2EBU:
 902                                                 layout->set_text("EBU");
 903                                                 break;
 904                                         case MeterIEC2BBC:
 905                                                 layout->set_text("BBC");
 906                                                 break;
 907                                         case MeterIEC1DIN:
 908                                                 layout->set_text("DIN");
 909                                                 break;
 910                                         case MeterIEC1NOR:
 911                                                 layout->set_text("NOR");
 912                                                 break;
 913                                         case MeterVU:
 914                                                 layout->set_text("VU");
 915                                                 break;
 916                                 }
 917                                 layout->get_pixel_size(tw, th);
 918                                 break;
 919                         case DataType::MIDI:
 920                                 layout->set_text("mid");
 921                                 layout->get_pixel_size(tw, th);
 922                                 break;
 923                 }
 924                 if (!background) {
 925                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 926                 }
 927                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 928                 if (tickleft) {
 929                         cairo_move_to (cr, width - 2 - tw, height - th - 0.5);
 930                 } else {
 931                         cairo_move_to (cr, 2, height - th - 0.5);
 932                 }
 933                 pango_cairo_show_layout (cr, layout->gobj());
 934         }
 935
 936         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 937
 938         cairo_destroy (cr);
 939         cairo_surface_destroy (surface);
 940
 941         return pattern;
 942 }
 943
 944 gint
 945 ArdourMeter::meter_expose_ticks (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mta)
 946 {
 947         Glib::RefPtr<Gdk::Window> win (mta->get_window());
 948         cairo_t* cr;
 949
 950         cr = gdk_cairo_create (win->gobj());
 951
 952         /* clip to expose area */
 953
 954         gdk_cairo_rectangle (cr, &ev->area);
 955         cairo_clip (cr);
 956
 957         cairo_pattern_t* pattern;
 958         const MeterMatricsMapKey key (mta->get_name(), type, types_to_bit(types));
 959         MetricPatternMap::iterator i = ticks_patterns.find (key);
 960
 961         if (i == ticks_patterns.end()) {
 962                 pattern = meter_render_ticks (*mta, type, types);
 963                 ticks_patterns[key] = pattern;
 964         } else {
 965                 pattern = i->second;
 966         }
 967
 968         cairo_move_to (cr, 0, 0);
 969         cairo_set_source (cr, pattern);
 970
 971         gint width, height;
 972         win->get_size (width, height);
 973
 974         cairo_rectangle (cr, 0, 0, width, height);
 975         cairo_fill (cr);
 976
 977         cairo_destroy (cr);
 978
 979         return true;
 980 }
 981
 982 gint
 983 ArdourMeter::meter_expose_metrics (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mma)
 984 {
 985         Glib::RefPtr<Gdk::Window> win (mma->get_window());
 986         cairo_t* cr;
 987
 988         cr = gdk_cairo_create (win->gobj());
 989
 990         /* clip to expose area */
 991
 992         gdk_cairo_rectangle (cr, &ev->area);
 993         cairo_clip (cr);
 994
 995         cairo_pattern_t* pattern;
 996         const MeterMatricsMapKey key (mma->get_name(), type, types_to_bit(types));
 997         MetricPatternMap::iterator i = metric_patterns.find (key);
 998
 999         if (i == metric_patterns.end()) {
1000                 pattern = meter_render_metrics (*mma, type, types);
1001                 metric_patterns[key] = pattern;
1002         } else {
1003                 pattern = i->second;
1004         }
1005
1006         cairo_move_to (cr, 0, 0);
1007         cairo_set_source (cr, pattern);
1008
1009         gint width, height;
1010         win->get_size (width, height);
1011
1012         cairo_rectangle (cr, 0, 0, width, height);
1013         cairo_fill (cr);
1014
1015         cairo_destroy (cr);
1016
1017         return true;
1018 }
1019
1020 void
1021 ArdourMeter::meter_clear_pattern_cache(int which) {
1022         MetricPatternMap::iterator i = metric_patterns.begin();
1023         MetricPatternMap::iterator j = ticks_patterns.begin();
1024
1025         while (i != metric_patterns.end()) {
1026                 int m = 4;
1027                 MeterMatricsMapKey const * const key = &(i->first);
1028                 std::string n = key->_n;
1029                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1030                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1031                 if (which & m) {
1032                         cairo_pattern_destroy(i->second);
1033                         metric_patterns.erase(i++);
1034                 } else {
1035                         ++i;
1036                 }
1037         }
1038
1039         while (j != ticks_patterns.end()) {
1040                 int m = 4;
1041                 MeterMatricsMapKey const * const key = &(j->first);
1042                 std::string n = key->_n;
1043                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1044                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1045                 if (which & m) {
1046                         cairo_pattern_destroy(j->second);
1047                         ticks_patterns.erase(j++);
1048                 } else {
1049                         ++j;
1050                 }
1051         }
1052         RedrawMetrics();
1053 }