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&, 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                 } else if (w.get_name().substr(0, 4) == "Mark") {
 285                         box_l = width-2; box_w = 2;
 286                         background = false;
 287                 }
 288         } else if (tickright) {
 289                 if (w.get_name().substr(0, 3) == "Bar") {
 290                         box_l = 0; box_w = 2;
 291                 } else if (w.get_name().substr(0, 4) == "Mark") {
 292                         box_l = 0; box_w = 2;
 293                         background = false;
 294                 }
 295         } else {
 296                 box_l = 0; box_w = 3;
 297         }
 298
 299         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 300         cairo_t* cr = cairo_create (surface);
 301
 302         cairo_move_to (cr, 0, 0);
 303         cairo_rectangle (cr, 0, 0, width, height);
 304
 305         if (background) {
 306                 /* meterbridge */
 307                 set_bg_color(w, cr, type);
 308         } else {
 309                 /* mixer */
 310                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 311                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 312         }
 313         cairo_fill (cr);
 314
 315         height = min(max_pattern_metric_size, height);
 316         uint32_t peakcolor = ARDOUR_UI::config()->color_by_name ("meterbridge peaklabel");
 317
 318         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 319
 320                 Gdk::Color c;
 321                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 322                         /* we're overlaying more than 1 set of marks, so use different colours */
 323                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 324                 } else if (background) {
 325                         set_fg_color(w, type, &c);
 326                 } else {
 327                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 328                 }
 329
 330                 // tick-maker position in dBFS, line-thickness
 331                 std::map<float,float> points;
 332
 333                 switch (*i) {
 334                 case DataType::AUDIO:
 335
 336                         switch (type) {
 337                                 case MeterK14:
 338                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 339                                         points.insert (std::pair<float,float>(-44.0f, 1.0));
 340                                         points.insert (std::pair<float,float>(-34.0f, 1.0));
 341                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 342                                         points.insert (std::pair<float,float>(-20.0f, 1.0));
 343                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 344                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); //   0
 345                                         points.insert (std::pair<float,float>(-11.0f, 1.0)); //  +3
 346                                         points.insert (std::pair<float,float>(-10.0f, 0.8)); //  +4
 347                                         points.insert (std::pair<float,float>( -8.0f, 1.0)); //  +6
 348                                         points.insert (std::pair<float,float>( -4.0f, 1.0)); // +10
 349                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 350                                         break;
 351                                 case MeterK20:
 352                                         points.insert (std::pair<float,float>(-60.0f, 1.0));
 353                                         points.insert (std::pair<float,float>(-50.0f, 1.0));
 354                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 355                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 356                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 357                                         points.insert (std::pair<float,float>(-23.0f, 1.0));
 358                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); //  0
 359                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 360                                         points.insert (std::pair<float,float>(-16.0f, 0.8));
 361                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); // +6
 362                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 363                                         points.insert (std::pair<float,float>( -5.0f, 1.0));
 364                                         points.insert (std::pair<float,float>(  0.0f, 1.0)); //+20
 365                                         break;
 366                                 case MeterIEC2EBU:
 367                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 368                                         points.insert (std::pair<float,float>(-28.0f, 0.5));
 369                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 370                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 371                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 372                                         points.insert (std::pair<float,float>(-20.0f, 0.5));
 373                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 374                                         points.insert (std::pair<float,float>(-16.0f, 0.5));
 375                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 376                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 377                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 378                                         points.insert (std::pair<float,float>( -9.0f, 0.8));
 379                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 380                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 381                                         break;
 382                                 case MeterIEC2BBC:
 383                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 384                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 385                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 386                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 387                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 388                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 389                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 390                                         break;
 391                                 case MeterIEC1NOR:
 392                                         points.insert (std::pair<float,float>(-60.0f, 1.0)); // -42
 393                                         points.insert (std::pair<float,float>(-57.0f, 0.5));
 394                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 395                                         points.insert (std::pair<float,float>(-51.0f, 0.5));
 396                                         points.insert (std::pair<float,float>(-48.0f, 1.0));
 397                                         points.insert (std::pair<float,float>(-45.0f, 0.5));
 398                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 399                                         points.insert (std::pair<float,float>(-39.0f, 0.5));
 400                                         points.insert (std::pair<float,float>(-36.0f, 1.0));
 401
 402                                         points.insert (std::pair<float,float>(-33.0f, 0.5));
 403                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 404                                         points.insert (std::pair<float,float>(-27.0f, 0.5));
 405                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 406                                         points.insert (std::pair<float,float>(-21.0f, 0.5));
 407
 408                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 409                                         points.insert (std::pair<float,float>(-15.0f, 0.5));
 410                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 411                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 412                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 413                                         mtr_red_stripe(cr, box_l, box_w, height,
 414                                                         meter_deflect_nordic(-6.0f), meter_deflect_nordic(-12.0f));
 415                                         break;
 416                                 case MeterIEC1DIN:
 417                                         points.insert (std::pair<float,float>( -3.0f, 0.5)); // "200%"
 418                                         points.insert (std::pair<float,float>( -4.0f, 1.0));
 419                                         points.insert (std::pair<float,float>( -5.0f, 0.5));
 420                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 421                                         points.insert (std::pair<float,float>( -7.0f, 0.5));
 422                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 423                                         points.insert (std::pair<float,float>( -9.0f, 1.0)); // "100%"
 424                                         points.insert (std::pair<float,float>(-10.0f, 0.5));
 425                                         points.insert (std::pair<float,float>(-11.0f, 0.5));
 426                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 427                                         points.insert (std::pair<float,float>(-13.0f, 0.5));
 428                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 429                                         points.insert (std::pair<float,float>(-15.0f, 0.8)); // "50%"
 430                                         points.insert (std::pair<float,float>(-18.0f, 0.8)); // "-9"
 431                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 432                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 433                                         points.insert (std::pair<float,float>(-29.0f, 1.0)); // "-20", "10%"
 434                                         points.insert (std::pair<float,float>(-34.0f, 0.5)); // -25
 435                                         //points.insert (std::pair<float,float>(-35.0f, 0.5)); // "5%" " -20"
 436                                         points.insert (std::pair<float,float>(-39.0f, 1.0));
 437                                         points.insert (std::pair<float,float>(-49.0f, 1.0));
 438                                         points.insert (std::pair<float,float>(-54.0f, 0.5));
 439                                         points.insert (std::pair<float,float>(-59.0f, 1.0));
 440                                         mtr_red_stripe(cr, box_l, box_w, height,
 441                                                         meter_deflect_din(0.0f), meter_deflect_din(-9.0f));
 442                                         break;
 443                                 case MeterVU:
 444                                         points.insert (std::pair<float,float>(-17.0f, 1.0)); //+3 VU
 445                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 446                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 447                                         points.insert (std::pair<float,float>(-19.5f, 0.5));
 448                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); // 0 VU
 449                                         points.insert (std::pair<float,float>(-20.5f, 0.5));
 450                                         points.insert (std::pair<float,float>(-21.0f, 1.0));
 451                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 452                                         points.insert (std::pair<float,float>(-23.0f, 1.0)); //-3 VU
 453                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 454                                         points.insert (std::pair<float,float>(-25.0f, 1.0));
 455                                         points.insert (std::pair<float,float>(-26.0f, 0.5));
 456                                         points.insert (std::pair<float,float>(-27.0f, 1.0)); //-7 VU
 457                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 458                                         points.insert (std::pair<float,float>(-35.0f, 0.5));
 459                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 460                                         mtr_red_stripe(cr, box_l, box_w, height,
 461                                                         meter_deflect_vu(-17.0f), meter_deflect_vu(-20.0f));
 462                                         break;
 463
 464                                 default:
 465                                         points.insert (std::pair<float,float>(-60, 0.5));
 466                                         points.insert (std::pair<float,float>(-50, 1.0));
 467                                         points.insert (std::pair<float,float>(-40, 1.0));
 468                                         points.insert (std::pair<float,float>(-30, 1.0));
 469                                         if (Config->get_meter_line_up_level() == MeteringLineUp24) {
 470                                                 points.insert (std::pair<float,float>(-24, 1.0));
 471                                         } else {
 472                                                 points.insert (std::pair<float,float>(-25, 1.0));
 473                                         }
 474                                         points.insert (std::pair<float,float>(-20, 1.0));
 475
 476                                         points.insert (std::pair<float,float>(-19, 0.5));
 477                                         points.insert (std::pair<float,float>(-18, 1.0));
 478                                         points.insert (std::pair<float,float>(-17, 0.5));
 479                                         points.insert (std::pair<float,float>(-16, 0.5));
 480                                         points.insert (std::pair<float,float>(-15, 1.0));
 481
 482                                         points.insert (std::pair<float,float>(-14, 0.5));
 483                                         points.insert (std::pair<float,float>(-13, 0.5));
 484                                         points.insert (std::pair<float,float>(-12, 0.5));
 485                                         points.insert (std::pair<float,float>(-11, 0.5));
 486                                         points.insert (std::pair<float,float>(-10, 1.0));
 487
 488                                         points.insert (std::pair<float,float>( -9, 1.0));
 489                                         points.insert (std::pair<float,float>( -8, 0.5));
 490                                         points.insert (std::pair<float,float>( -7, 0.5));
 491                                         points.insert (std::pair<float,float>( -6, 0.5));
 492                                         points.insert (std::pair<float,float>( -5, 1.0));
 493                                         points.insert (std::pair<float,float>( -4, 0.5));
 494                                         points.insert (std::pair<float,float>( -3, 1.0));
 495                                         points.insert (std::pair<float,float>( -2, 0.5));
 496                                         points.insert (std::pair<float,float>( -1, 0.5));
 497
 498                                         points.insert (std::pair<float,float>(  0, 1.0));
 499                                         points.insert (std::pair<float,float>(  1, 0.5));
 500                                         points.insert (std::pair<float,float>(  2, 0.5));
 501                                         points.insert (std::pair<float,float>(  3, 1.0));
 502                                         points.insert (std::pair<float,float>(  4, 0.5));
 503                                         points.insert (std::pair<float,float>(  5, 0.5));
 504                                         break;
 505                         }
 506                         break;
 507
 508                 case DataType::MIDI:
 509                         points.insert (std::pair<float,float>(  0, 1.0));
 510                         points.insert (std::pair<float,float>( 16, 0.5));
 511                         points.insert (std::pair<float,float>( 32, 0.5));
 512                         points.insert (std::pair<float,float>( 48, 0.5));
 513                         points.insert (std::pair<float,float>( 64, 1.0));
 514                         points.insert (std::pair<float,float>( 80, 0.5));
 515                         points.insert (std::pair<float,float>( 96, 0.5));
 516                         points.insert (std::pair<float,float>(100, 1.0));
 517                         points.insert (std::pair<float,float>(112, 0.5));
 518                         points.insert (std::pair<float,float>(127, 1.0));
 519                         break;
 520                 }
 521
 522                 for (std::map<float,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
 523                         cairo_set_line_width (cr, (j->second));
 524
 525                         float fraction = 0;
 526                         gint pos;
 527
 528                         switch (*i) {
 529                         case DataType::AUDIO:
 530                                 fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 531
 532                                 pos = height - (gint) floor (height * fraction);
 533                                 pos = max (pos, 1);
 534                                 cairo_move_to(cr, 0, pos + .5);
 535                                 cairo_line_to(cr, 3, pos + .5);
 536                                 cairo_stroke (cr);
 537                                 break;
 538                         case DataType::MIDI:
 539                                 fraction = (j->first) / 127.0;
 540                                 pos = 1 + height - (gint) floor (height * fraction);
 541                                 pos = min (pos, height);
 542                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 543                                 cairo_arc(cr, 1.5, pos + .5, 1.0, 0, 2 * M_PI);
 544                                 cairo_fill(cr);
 545                                 break;
 546                         }
 547                 }
 548         }
 549
 550         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 551
 552         cairo_destroy (cr);
 553         cairo_surface_destroy (surface);
 554
 555         return pattern;
 556 }
 557
 558 static cairo_pattern_t*
 559 meter_render_metrics (Gtk::Widget& w, MeterType type, vector<DataType> types)
 560 {
 561         Glib::RefPtr<Gdk::Window> win (w.get_window());
 562
 563         bool tickleft, tickright;
 564         bool background;
 565         int overlay_midi = 1;
 566         gint width, height;
 567         win->get_size (width, height);
 568
 569         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 570         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 571         background = types.size() == 0 || tickleft || tickright;
 572
 573         if (!tickleft && !tickright) {
 574                 tickright = true;
 575         }
 576
 577         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 578         cairo_t* cr = cairo_create (surface);
 579         Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
 580
 581         Pango::AttrList audio_font_attributes;
 582         Pango::AttrList midi_font_attributes;
 583         Pango::AttrList unit_font_attributes;
 584
 585         Pango::AttrFontDesc* font_attr;
 586         Pango::FontDescription font;
 587
 588         font = Pango::FontDescription ("ArdourMono");
 589         double fixfontsize = 81920.0 / (double) ARDOUR::Config->get_font_scale();
 590
 591         font.set_weight (Pango::WEIGHT_NORMAL);
 592         font.set_size (9.0 * PANGO_SCALE * fixfontsize);
 593         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 594         audio_font_attributes.change (*font_attr);
 595         delete font_attr;
 596
 597         font.set_weight (Pango::WEIGHT_ULTRALIGHT);
 598         font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
 599         font.set_size (8.0 * PANGO_SCALE * fixfontsize);
 600         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 601         midi_font_attributes.change (*font_attr);
 602         delete font_attr;
 603
 604         font.set_size (6.0 * PANGO_SCALE * fixfontsize);
 605         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 606         unit_font_attributes.change (*font_attr);
 607         delete font_attr;
 608
 609         cairo_move_to (cr, 0, 0);
 610         cairo_rectangle (cr, 0, 0, width, height);
 611         if (background) {
 612                 /* meterbridge */
 613                 set_bg_color(w, cr, type);
 614         } else {
 615                 /* mixer */
 616                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 617                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 618         }
 619         cairo_fill (cr);
 620
 621         cairo_set_line_width (cr, 1.0);
 622
 623         height = min(max_pattern_metric_size, height);
 624         uint32_t peakcolor = ARDOUR_UI::config()->color_by_name ("meterbridge peaklabel");
 625         Gdk::Color c; // default text color
 626
 627         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 628
 629                 if (types.size() > 1 && (*i) == DataType::MIDI && overlay_midi == 0) {
 630                         continue;
 631                 }
 632
 633                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 634                         /* we're overlaying more than 1 set of marks, so use different colours */
 635                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 636                 } else if (background) {
 637                         set_fg_color(w, type, &c);
 638                 } else {
 639                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 640                 }
 641
 642                 std::map<float,string> points; // map: label-pos in dBFS, label-text
 643
 644                 switch (*i) {
 645                 case DataType::AUDIO:
 646                         layout->set_attributes (audio_font_attributes);
 647                         switch (type) {
 648                                 case MeterK14:
 649                                         overlay_midi = 0;
 650                                         points.insert (std::pair<float,string>(-54.0f, "-40"));
 651                                         points.insert (std::pair<float,string>(-44.0f, "-30"));
 652                                         points.insert (std::pair<float,string>(-34.0f, "-20"));
 653                                         points.insert (std::pair<float,string>(-24.0f, "-10"));
 654                                         points.insert (std::pair<float,string>(-20.0f,  "-6"));
 655                                         points.insert (std::pair<float,string>(-17.0f,  "-3"));
 656                                         points.insert (std::pair<float,string>(-14.0f,  " 0"));
 657                                         points.insert (std::pair<float,string>(-11.0f,  "+3"));
 658                                         points.insert (std::pair<float,string>( -8.0f,  "+6"));
 659                                         points.insert (std::pair<float,string>( -4.0f, "+10"));
 660                                         points.insert (std::pair<float,string>(  0.0f, "+14"));
 661                                         break;
 662                                 case MeterK20:
 663                                         overlay_midi = 0;
 664                                         points.insert (std::pair<float,string>(-60.0f, "-40"));
 665                                         points.insert (std::pair<float,string>(-50.0f, "-30"));
 666                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 667                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 668                                         points.insert (std::pair<float,string>(-26.0f,  "-6"));
 669                                         points.insert (std::pair<float,string>(-23.0f,  "-3"));
 670                                         points.insert (std::pair<float,string>(-20.0f,  " 0"));
 671                                         points.insert (std::pair<float,string>(-17.0f,  "+3"));
 672                                         points.insert (std::pair<float,string>(-14.0f,  "+6"));
 673                                         points.insert (std::pair<float,string>(-10.0f, "+10"));
 674                                         points.insert (std::pair<float,string>( -5.0f, "+15"));
 675                                         points.insert (std::pair<float,string>(  0.0f, "+20"));
 676                                         break;
 677                                 default:
 678                                 case MeterPeak:
 679                                 case MeterKrms:
 680                                         points.insert (std::pair<float,string>(-50.0f, "-50"));
 681                                         points.insert (std::pair<float,string>(-40.0f, "-40"));
 682                                         points.insert (std::pair<float,string>(-30.0f, "-30"));
 683                                         points.insert (std::pair<float,string>(-20.0f, "-20"));
 684                                         if (types.size() == 1) {
 685                                                 if (Config->get_meter_line_up_level() == MeteringLineUp24) {
 686                                                         points.insert (std::pair<float,string>(-24.0f, "-24"));
 687                                                 } else {
 688                                                         points.insert (std::pair<float,string>(-25.0f, "-25"));
 689                                                 }
 690                                                 points.insert (std::pair<float,string>(-15.0f, "-15"));
 691                                         }
 692                                         points.insert (std::pair<float,string>(-18.0f, "-18"));
 693                                         points.insert (std::pair<float,string>(-10.0f, "-10"));
 694                                         points.insert (std::pair<float,string>( -5.0f, "-5"));
 695                                         points.insert (std::pair<float,string>( -3.0f, "-3"));
 696                                         points.insert (std::pair<float,string>(  0.0f, "+0"));
 697                                         points.insert (std::pair<float,string>(  3.0f, "+3"));
 698                                         break;
 699
 700                                 case MeterIEC2EBU:
 701                                         overlay_midi = 3;
 702                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 703                                         points.insert (std::pair<float,string>(-26.0f, "-8"));
 704                                         points.insert (std::pair<float,string>(-22.0f, "-4"));
 705                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 706                                         points.insert (std::pair<float,string>(-14.0f, "+4"));
 707                                         points.insert (std::pair<float,string>(-10.0f, "+8"));
 708                                         points.insert (std::pair<float,string>( -6.0f, "+12"));
 709                                         break;
 710
 711                                 case MeterIEC2BBC:
 712                                         overlay_midi = 3;
 713                                         points.insert (std::pair<float,string>(-30.0f, " 1 "));
 714                                         points.insert (std::pair<float,string>(-26.0f, " 2 "));
 715                                         points.insert (std::pair<float,string>(-22.0f, " 3 "));
 716                                         points.insert (std::pair<float,string>(-18.0f, " 4 "));
 717                                         points.insert (std::pair<float,string>(-14.0f, " 5 "));
 718                                         points.insert (std::pair<float,string>(-10.0f, " 6 "));
 719                                         points.insert (std::pair<float,string>( -6.0f, " 7 "));
 720                                         break;
 721
 722                                 case MeterIEC1NOR:
 723                                         overlay_midi = 0;
 724                                         //points.insert (std::pair<float,string>(-60.0f, "-42"));
 725                                         points.insert (std::pair<float,string>(-54.0f, "-36"));
 726                                         points.insert (std::pair<float,string>(-48.0f, "-30"));
 727                                         points.insert (std::pair<float,string>(-42.0f, "-24"));
 728                                         points.insert (std::pair<float,string>(-36.0f, "-18"));
 729
 730                                         //points.insert (std::pair<float,string>(-33.0f, "-15"));
 731                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 732                                         //points.insert (std::pair<float,string>(-27.0f, "-9"));
 733                                         points.insert (std::pair<float,string>(-24.0f, "-6"));
 734                                         //points.insert (std::pair<float,string>(-21.0f, "-3"));
 735
 736                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 737                                         //points.insert (std::pair<float,string>(-15.0f, "+3"));
 738                                         points.insert (std::pair<float,string>(-12.0f, "+6"));
 739                                         points.insert (std::pair<float,string>( -9.0f, "+9"));
 740                                         //points.insert (std::pair<float,string>( -6.0f, "+12"));
 741                                         break;
 742
 743                                 case MeterIEC1DIN:
 744                                         overlay_midi = 2;
 745                                         //points.insert (std::pair<float,string>( -3.0f, "200%"));
 746                                         points.insert (std::pair<float,string>( -4.0f, "+5"));
 747                                         points.insert (std::pair<float,string>( -9.0f, "0")); // "100%";
 748                                         points.insert (std::pair<float,string>(-14.0f, "-5"));
 749                                         //points.insert (std::pair<float,string>(-15.0f, "50%"));
 750                                         //points.insert (std::pair<float,string>(-18.0f, "-9"));
 751                                         points.insert (std::pair<float,string>(-19.0f, "-10")); // "30%"
 752                                         points.insert (std::pair<float,string>(-29.0f, "-20")); // "10%"
 753                                         //points.insert (std::pair<float,string>(-35.0f, "5%")); // "5%"
 754                                         points.insert (std::pair<float,string>(-39.0f, "-30"));
 755                                         //points.insert (std::pair<float,string>(-49.0f, "1%"));
 756                                         points.insert (std::pair<float,string>(-59.0f, "-50"));
 757                                         break;
 758
 759                                 case MeterVU:
 760                                         overlay_midi = 0;
 761                                         points.insert (std::pair<float,string>(-17.0f, "+3"));
 762                                         points.insert (std::pair<float,string>(-18.0f, "+2"));
 763                                         points.insert (std::pair<float,string>(-19.0f, "+1"));
 764                                         points.insert (std::pair<float,string>(-20.0f, " 0"));
 765                                         points.insert (std::pair<float,string>(-21.0f, "-1"));
 766                                         points.insert (std::pair<float,string>(-22.0f, "-2"));
 767                                         points.insert (std::pair<float,string>(-23.0f, "-3"));
 768                                         points.insert (std::pair<float,string>(-25.0f, "-5"));
 769                                         points.insert (std::pair<float,string>(-27.0f, "-7"));
 770                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 771                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 772                                         break;
 773                         }
 774                         break;
 775                 case DataType::MIDI:
 776                         layout->set_attributes (midi_font_attributes);
 777                         if (types.size() == 1) {
 778                                 points.insert (std::pair<float,string>(  0, "0"));
 779                                 points.insert (std::pair<float,string>( 16,  "16"));
 780                                 points.insert (std::pair<float,string>( 32,  "32"));
 781                                 points.insert (std::pair<float,string>( 48,  "48"));
 782                                 points.insert (std::pair<float,string>( 64,  "64"));
 783                                 points.insert (std::pair<float,string>( 80,  "80"));
 784                                 points.insert (std::pair<float,string>( 96,  "96"));
 785                                 points.insert (std::pair<float,string>(100, "100"));
 786                                 points.insert (std::pair<float,string>(112, "112"));
 787                         } else {
 788                                 switch (overlay_midi) {
 789                                         case 1:
 790                                                 /* labels that don't overlay with dBFS */
 791                                                 points.insert (std::pair<float,string>(  0, "0"));
 792                                                 points.insert (std::pair<float,string>( 24, "24"));
 793                                                 points.insert (std::pair<float,string>( 48, "48"));
 794                                                 points.insert (std::pair<float,string>( 72, "72"));
 795                                                 points.insert (std::pair<float,string>(127, "127"));
 796                                                 break;
 797                                         case 2:
 798                                                 /* labels that don't overlay with DIN */
 799                                                 points.insert (std::pair<float,string>(  0, "0"));
 800                                                 points.insert (std::pair<float,string>( 16,  "16"));
 801                                                 points.insert (std::pair<float,string>( 40,  "40"));
 802                                                 points.insert (std::pair<float,string>( 64,  "64"));
 803                                                 points.insert (std::pair<float,string>(112, "112"));
 804                                                 points.insert (std::pair<float,string>(127, "127"));
 805                                                 break;
 806                                         case 3:
 807                                                 /* labels that don't overlay with BBC nor EBU*/
 808                                                 points.insert (std::pair<float,string>(  0, "0"));
 809                                                 points.insert (std::pair<float,string>( 16, "16"));
 810                                                 points.insert (std::pair<float,string>( 56, "56"));
 811                                                 points.insert (std::pair<float,string>( 72, "72"));
 812                                                 points.insert (std::pair<float,string>(112, "112"));
 813                                                 points.insert (std::pair<float,string>(127, "127"));
 814                                         default:
 815                                                 break;
 816                                 }
 817                         }
 818                         break;
 819                 }
 820
 821                 gint pos = -1;
 822
 823                 for (std::map<float,string>::const_iterator j = points.begin(); j != points.end(); ++j) {
 824                         float fraction = 0;
 825                         bool align_center = background; // this is true for meterbridge meters w/ fixed background
 826                         switch (*i) {
 827                                 case DataType::AUDIO:
 828                                         fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 829
 830                                         pos = height - (gint) floor (height * fraction);
 831                                         pos = max (pos, 1);
 832                                         if (tickleft) {
 833                                                 cairo_move_to(cr, width-1.5, pos + .5);
 834                                                 cairo_line_to(cr, width, pos + .5);
 835                                                 cairo_stroke (cr);
 836                                         } else if (tickright) {
 837                                                 cairo_move_to(cr, 0, pos + .5);
 838                                                 cairo_line_to(cr, 1.5, pos + .5);
 839                                                 cairo_stroke (cr);
 840                                         }
 841                                         break;
 842
 843                                 case DataType::MIDI:
 844                                         align_center = false; // don't bleed into legend
 845                                         fraction = (j->first) / 127.0;
 846                                         pos = 1 + height - (gint) lrintf (height * fraction);
 847                                         pos = min (pos, height);
 848                                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 849                                         if (tickleft) {
 850                                                 cairo_arc(cr, width - 2.0, pos + .5, 1.0, 0, 2 * M_PI);
 851                                                 cairo_fill(cr);
 852                                         } else if (tickright) {
 853                                                 cairo_arc(cr, 3, pos + .5, 1.0, 0, 2 * M_PI);
 854                                                 cairo_fill(cr);
 855                                         }
 856                                         break;
 857                         }
 858
 859                         if (pos < 0) continue;
 860
 861                         layout->set_text(j->second.c_str());
 862
 863                         int tw, th;
 864                         layout->get_pixel_size(tw, th);
 865
 866                         int p = pos - (th / 2) - 1;
 867                         p = min (p, height - th);
 868                         p = max (p, 0);
 869
 870                         if (align_center) {
 871                                 cairo_move_to (cr, (width-tw)/2.0, p);
 872                         } else {
 873                                 cairo_move_to (cr, width-3-tw, p);
 874                         }
 875
 876                         cairo_set_line_width(cr, 0.12);
 877                         cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
 878                         pango_cairo_layout_path(cr, layout->gobj());
 879                         cairo_stroke_preserve (cr);
 880                         cairo_set_line_width(cr, 1.0);
 881
 882                         if ((*i) == DataType::AUDIO) {
 883                                 mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 884                         } else {
 885                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 886                         }
 887
 888                         pango_cairo_show_layout (cr, layout->gobj());
 889                         cairo_new_path(cr);
 890                 }
 891         }
 892
 893         // add legend
 894         if (types.size() == 1 || overlay_midi == 0) {
 895                 int tw, th;
 896                 layout->set_attributes (unit_font_attributes);
 897                 switch (types.at(0)) {
 898                         case DataType::AUDIO:
 899                                 switch (type) {
 900                                         case MeterK20:
 901                                                 layout->set_text("K20");
 902                                                 break;
 903                                         case MeterK14:
 904                                                 layout->set_text("K14");
 905                                                 break;
 906                                         default:
 907                                         case MeterPeak:
 908                                         case MeterKrms:
 909                                                 layout->set_text("dBFS");
 910                                                 break;
 911                                         case MeterIEC2EBU:
 912                                                 layout->set_text("EBU");
 913                                                 break;
 914                                         case MeterIEC2BBC:
 915                                                 layout->set_text("BBC");
 916                                                 break;
 917                                         case MeterIEC1DIN:
 918                                                 layout->set_text("DIN");
 919                                                 break;
 920                                         case MeterIEC1NOR:
 921                                                 layout->set_text("NOR");
 922                                                 break;
 923                                         case MeterVU:
 924                                                 layout->set_text("VU");
 925                                                 break;
 926                                 }
 927                                 layout->get_pixel_size(tw, th);
 928                                 break;
 929                         case DataType::MIDI:
 930                                 layout->set_text("mid");
 931                                 layout->get_pixel_size(tw, th);
 932                                 break;
 933                 }
 934                 if (!background) {
 935                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 936                 }
 937                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 938                 if (tickleft) {
 939                         cairo_move_to (cr, width - 2 - tw, height - th - 0.5);
 940                 } else {
 941                         cairo_move_to (cr, 2, height - th - 0.5);
 942                 }
 943                 pango_cairo_show_layout (cr, layout->gobj());
 944         }
 945
 946         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 947
 948         cairo_destroy (cr);
 949         cairo_surface_destroy (surface);
 950
 951         return pattern;
 952 }
 953
 954 gint
 955 ArdourMeter::meter_expose_ticks (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mta)
 956 {
 957         Glib::RefPtr<Gdk::Window> win (mta->get_window());
 958         cairo_t* cr;
 959
 960         cr = gdk_cairo_create (win->gobj());
 961
 962         /* clip to expose area */
 963
 964         gdk_cairo_rectangle (cr, &ev->area);
 965         cairo_clip (cr);
 966
 967         cairo_pattern_t* pattern;
 968         const MeterMatricsMapKey key (mta->get_name(), type, types_to_bit(types));
 969         MetricPatternMap::iterator i = ticks_patterns.find (key);
 970
 971         if (i == ticks_patterns.end()) {
 972                 pattern = meter_render_ticks (*mta, type, types);
 973                 ticks_patterns[key] = pattern;
 974         } else {
 975                 pattern = i->second;
 976         }
 977
 978         cairo_move_to (cr, 0, 0);
 979         cairo_set_source (cr, pattern);
 980
 981         gint width, height;
 982         win->get_size (width, height);
 983
 984         cairo_rectangle (cr, 0, 0, width, height);
 985         cairo_fill (cr);
 986
 987         cairo_destroy (cr);
 988
 989         return true;
 990 }
 991
 992 gint
 993 ArdourMeter::meter_expose_metrics (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mma)
 994 {
 995         Glib::RefPtr<Gdk::Window> win (mma->get_window());
 996         cairo_t* cr;
 997
 998         cr = gdk_cairo_create (win->gobj());
 999
1000         /* clip to expose area */
1001
1002         gdk_cairo_rectangle (cr, &ev->area);
1003         cairo_clip (cr);
1004
1005         cairo_pattern_t* pattern;
1006         const MeterMatricsMapKey key (mma->get_name(), type, types_to_bit(types));
1007         MetricPatternMap::iterator i = metric_patterns.find (key);
1008
1009         if (i == metric_patterns.end()) {
1010                 pattern = meter_render_metrics (*mma, type, types);
1011                 metric_patterns[key] = pattern;
1012         } else {
1013                 pattern = i->second;
1014         }
1015
1016         cairo_move_to (cr, 0, 0);
1017         cairo_set_source (cr, pattern);
1018
1019         gint width, height;
1020         win->get_size (width, height);
1021
1022         cairo_rectangle (cr, 0, 0, width, height);
1023         cairo_fill (cr);
1024
1025         cairo_destroy (cr);
1026
1027         return true;
1028 }
1029
1030 void
1031 ArdourMeter::meter_clear_pattern_cache(int which) {
1032         MetricPatternMap::iterator i = metric_patterns.begin();
1033         MetricPatternMap::iterator j = ticks_patterns.begin();
1034
1035         while (i != metric_patterns.end()) {
1036                 int m = 4;
1037                 MeterMatricsMapKey const * const key = &(i->first);
1038                 std::string n = key->_n;
1039                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1040                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1041                 if (which & m) {
1042                         cairo_pattern_destroy(i->second);
1043                         metric_patterns.erase(i++);
1044                 } else {
1045                         ++i;
1046                 }
1047         }
1048
1049         while (j != ticks_patterns.end()) {
1050                 int m = 4;
1051                 MeterMatricsMapKey const * const key = &(j->first);
1052                 std::string n = key->_n;
1053                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1054                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1055                 if (which & m) {
1056                         cairo_pattern_destroy(j->second);
1057                         ticks_patterns.erase(j++);
1058                 } else {
1059                         ++j;
1060                 }
1061         }
1062         RedrawMetrics();
1063 }