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 <gtkmm/drawingarea.h>
  21
  22 #include <gtkmm2ext/cairo_widget.h>
  23 #include <gtkmm2ext/gtk_ui.h>
  24 #include <gtkmm2ext/utils.h>
  25 #include <gtkmm2ext/rgb_macros.h>
  26
  27 #include "ardour/logmeter.h"
  28 #include <ardour/rc_configuration.h>
  29
  30 #include "utils.h"
  31 #include "meter_patterns.h"
  32 #include "ui_config.h"
  33
  34 #include "pbd/i18n.h"
  35
  36 using namespace ARDOUR;
  37 using namespace ARDOUR_UI_UTILS;
  38 using namespace PBD;
  39 using namespace Gtk;
  40 using namespace Gtkmm2ext;
  41 using namespace std;
  42 using namespace ArdourMeter;
  43
  44 static const int max_pattern_metric_size = 1026;
  45
  46 /* signals used by meters */
  47
  48 sigc::signal<void> ArdourMeter::ResetAllPeakDisplays;
  49 sigc::signal<void,ARDOUR::Route*> ArdourMeter::ResetRoutePeakDisplays;
  50 sigc::signal<void,ARDOUR::RouteGroup*> ArdourMeter::ResetGroupPeakDisplays;
  51 sigc::signal<void> ArdourMeter::RedrawMetrics;
  52
  53 sigc::signal<void, int, ARDOUR::RouteGroup*, ARDOUR::MeterType> ArdourMeter::SetMeterTypeMulti;
  54
  55
  56 /* pattern cache */
  57
  58 struct MeterMatricsMapKey {
  59         MeterMatricsMapKey (std::string n, MeterType t, int dt)
  60                 : _n(n)
  61                 , _t(t)
  62                 , _dt(dt)
  63         {}
  64         inline bool operator<(const MeterMatricsMapKey& rhs) const {
  65                 return (_n < rhs._n) || (_n == rhs._n && _t < rhs._t) || (_n == rhs._n && _t == rhs._t && _dt < rhs._dt);
  66         }
  67         std::string _n;
  68         MeterType _t;
  69         int _dt;
  70 };
  71
  72 namespace ArdourMeter {
  73         typedef std::map<MeterMatricsMapKey, cairo_pattern_t*> MetricPatternMap;
  74 }
  75
  76 static ArdourMeter::MetricPatternMap ticks_patterns;
  77 static ArdourMeter::MetricPatternMap metric_patterns;
  78
  79
  80 const std::string
  81 ArdourMeter::meter_type_string (ARDOUR::MeterType mt)
  82 {
  83         switch (mt) {
  84                 case MeterPeak:
  85                         return _("Peak (+6dBFS)");
  86                         break;
  87                 case MeterPeak0dB:
  88                         return _("Peak (0dBFS)");
  89                         break;
  90                 case MeterKrms:
  91                         return _("RMS + Peak");
  92                         break;
  93                 case MeterIEC1DIN:
  94                         return _("IEC1/DIN");
  95                         break;
  96                 case MeterIEC1NOR:
  97                         return _("IEC1/Nordic");
  98                         break;
  99                 case MeterIEC2BBC:
 100                         return _("IEC2/BBC");
 101                         break;
 102                 case MeterIEC2EBU:
 103                         return _("IEC2/EBU");
 104                         break;
 105                 case MeterK20:
 106                         return _("K20/RMS");
 107                         break;
 108                 case MeterK14:
 109                         return _("K14/RMS");
 110                         break;
 111                 case MeterK12:
 112                         return _("K12/RMS");
 113                         break;
 114                 case MeterVU:
 115                         return _("VU");
 116                         break;
 117                 default:
 118                         assert(0);
 119                         return _("???");
 120                         break;
 121         }
 122 }
 123
 124 static inline int types_to_bit (vector<ARDOUR::DataType> types) {
 125         int rv = 0;
 126         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 127                 rv |= 1 << (*i);
 128         }
 129         return rv;
 130 }
 131
 132 static inline float mtr_col_and_fract(
 133                 cairo_t* cr, Gdk::Color const * const c, const uint32_t peakcolor, const MeterType mt, const float val)
 134 {
 135         float fraction = 0;
 136
 137         switch (mt) {
 138                 default:
 139                 case MeterKrms:
 140                 case MeterPeak:
 141                         fraction = log_meter (val);
 142                         if (val >= 0 || val == -9) {
 143                                 cairo_set_source_rgb (cr,
 144                                                 UINT_RGBA_R_FLT(peakcolor),
 145                                                 UINT_RGBA_G_FLT(peakcolor),
 146                                                 UINT_RGBA_B_FLT(peakcolor));
 147                         } else {
 148                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 149                         }
 150                         break;
 151                 case MeterPeak0dB:
 152                         fraction = log_meter0dB (val);
 153                         if (val >= 0 || val == -9) {
 154                                 cairo_set_source_rgb (cr,
 155                                                 UINT_RGBA_R_FLT(peakcolor),
 156                                                 UINT_RGBA_G_FLT(peakcolor),
 157                                                 UINT_RGBA_B_FLT(peakcolor));
 158                         } else {
 159                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 160                         }
 161                         break;
 162                 case MeterIEC2BBC:
 163                 case MeterIEC2EBU:
 164                         fraction = meter_deflect_ppm(val);
 165                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 166                         break;
 167                 case MeterIEC1NOR:
 168                         fraction = meter_deflect_nordic(val);
 169 #if 0
 170                         if (val == -18.0) {
 171                                 cairo_set_source_rgb (cr,
 172                                                 UINT_RGBA_R_FLT(peakcolor),
 173                                                 UINT_RGBA_G_FLT(peakcolor),
 174                                                 UINT_RGBA_B_FLT(peakcolor));
 175                         } else {
 176                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 177                         }
 178 #else
 179                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 180 #endif
 181                         break;
 182                 case MeterIEC1DIN:
 183                         fraction = meter_deflect_din(val);
 184                         if (val == -9.0 || val == -15 || val == -18) {
 185                                 cairo_set_source_rgb (cr,
 186                                                 UINT_RGBA_R_FLT(peakcolor),
 187                                                 UINT_RGBA_G_FLT(peakcolor),
 188                                                 UINT_RGBA_B_FLT(peakcolor));
 189                         } else {
 190                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 191                         }
 192                         break;
 193                 case MeterVU:
 194                         fraction = meter_deflect_vu(val);
 195                         if (val >= -20.0) {
 196                                 cairo_set_source_rgb (cr,
 197                                                 UINT_RGBA_R_FLT(peakcolor),
 198                                                 UINT_RGBA_G_FLT(peakcolor),
 199                                                 UINT_RGBA_B_FLT(peakcolor));
 200                         } else {
 201                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 202                         }
 203                         break;
 204                 case MeterK20:
 205                         fraction = meter_deflect_k (val, 20);
 206                         if (val >= -16.0) {
 207                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 208                         } else if (val >= -20.0) {
 209                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 210                         } else {
 211                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 212                         }
 213                         break;
 214                 case MeterK14:
 215                         if (val >= -10.0) {
 216                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 217                         } else if (val >= -14.0) {
 218                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 219                         } else {
 220                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 221                         }
 222                         fraction = meter_deflect_k (val, 14);
 223                         break;
 224                 case MeterK12:
 225                         if (val >= -8.0) {
 226                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 227                         } else if (val >= -12.0) {
 228                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 229                         } else {
 230                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 231                         }
 232                         fraction = meter_deflect_k (val, 12);
 233                         break;
 234         }
 235         return fraction;
 236 }
 237
 238 static void mtr_red_stripe(cairo_t* cr, float l, float w, int h, float top, float bot) {
 239         if (w <= 0) return;
 240         int t = h - floorf (h * (top));
 241         int b = h - floorf (h * (bot));
 242         cairo_set_source_rgba (cr, .75, 0, 0, 0.75);
 243         cairo_rectangle (cr, l, t + .5, w, b - t);
 244         cairo_fill (cr);
 245 }
 246
 247 static void set_bg_color (Gtk::Widget& w, cairo_t* cr, MeterType type) {
 248         double r,g,b,a;
 249         switch(type) {
 250                 case MeterVU:
 251                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip vu bg"), r, g, b, a);
 252                         break;
 253                 case MeterIEC1DIN:
 254                 case MeterIEC1NOR:
 255                 case MeterIEC2BBC:
 256                 case MeterIEC2EBU:
 257                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip ppm bg"), r, g, b, a);
 258                         break;
 259                 case MeterK12:
 260                 case MeterK14:
 261                 case MeterK20:
 262                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip dpm bg"), r, g, b, a);
 263                         break;
 264                 default:
 265                         {
 266                         Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_ACTIVE);
 267                         r = c.get_red_p();
 268                         g = c.get_green_p();
 269                         b = c.get_blue_p();
 270                         }
 271                         break;
 272         }
 273         cairo_set_source_rgb (cr, r, g, b);
 274 }
 275
 276 static void set_fg_color(Gtk::Widget&, MeterType type, Gdk::Color * c) {
 277         double r,g,b,a;
 278         switch(type) {
 279                 case MeterVU:
 280                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip vu fg"), r, g, b, a);
 281                         break;
 282                 case MeterIEC1DIN:
 283                 case MeterIEC1NOR:
 284                 case MeterIEC2BBC:
 285                 case MeterIEC2EBU:
 286                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip ppm fg"), r, g, b, a);
 287                         break;
 288                 default:
 289                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip dpm fg"), r, g, b, a);
 290                         break;
 291         }
 292         c->set_rgb_p (r, g, b);
 293 }
 294
 295 static cairo_pattern_t*
 296 meter_render_ticks (Gtk::Widget& w, MeterType type, vector<ARDOUR::DataType> types)
 297 {
 298         Glib::RefPtr<Gdk::Window> win (w.get_window());
 299
 300         bool background;
 301         bool tickleft, tickright;
 302         gint width, height;
 303         win->get_size (width, height);
 304         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 305         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 306         background = types.size() == 0 || tickleft || tickright;
 307
 308         float box_l=0;
 309         float box_w=0;
 310 #define PX_SCALE(pxmin, dflt) rint(std::max((double)pxmin, (double)dflt * UIConfiguration::instance().get_ui_scale()))
 311         if (tickleft) {
 312                 if (w.get_name().substr(0, 3) == "Bar") {
 313                         box_w = PX_SCALE(2, 2);
 314                         box_l = width - box_w;
 315                 } else if (w.get_name().substr(0, 4) == "Mark") {
 316                         box_w = PX_SCALE(2, 2);
 317                         box_l = width - box_w;
 318                         background = false;
 319                 }
 320         } else if (tickright) {
 321                 if (w.get_name().substr(0, 3) == "Bar") {
 322                         box_l = 0; box_w = PX_SCALE(2, 2);
 323                 } else if (w.get_name().substr(0, 4) == "Mark") {
 324                         box_l = 0; box_w = PX_SCALE(2, 2);
 325                         background = false;
 326                 }
 327         } else {
 328                 box_l = 0; box_w = width;
 329         }
 330 #undef PX_SCALE
 331
 332         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 333         cairo_t* cr = cairo_create (surface);
 334
 335         cairo_move_to (cr, 0, 0);
 336         cairo_rectangle (cr, 0, 0, width, height);
 337
 338         if (background) {
 339                 /* meterbridge */
 340                 set_bg_color(w, cr, type);
 341         } else {
 342                 /* mixer */
 343                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 344                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 345         }
 346         cairo_fill (cr);
 347
 348         height = min(max_pattern_metric_size, height);
 349         uint32_t peakcolor = UIConfiguration::instance().color ("meterbridge peaklabel");
 350
 351         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 352
 353                 Gdk::Color c;
 354                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 355                         /* we're overlaying more than 1 set of marks, so use different colours */
 356                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 357                 } else if (background) {
 358                         set_fg_color(w, type, &c);
 359                 } else {
 360                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 361                 }
 362
 363                 // tick-maker position in dBFS, line-thickness
 364                 std::map<float,float> points;
 365
 366                 switch (*i) {
 367                 case DataType::AUDIO:
 368
 369                         switch (type) {
 370                                 case MeterK12:
 371                                         points.insert (std::pair<float,float>(-52.0f, 1.0));
 372                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 373                                         points.insert (std::pair<float,float>(-32.0f, 1.0));
 374                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 375                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 376                                         points.insert (std::pair<float,float>(-15.0f, 1.0));
 377                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 378                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 379                                         points.insert (std::pair<float,float>( -8.0f, 0.8));
 380                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 381                                         points.insert (std::pair<float,float>( -3.0f, 1.0));
 382                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 383                                         break;
 384                                 case MeterK14:
 385                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 386                                         points.insert (std::pair<float,float>(-44.0f, 1.0));
 387                                         points.insert (std::pair<float,float>(-34.0f, 1.0));
 388                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 389                                         points.insert (std::pair<float,float>(-20.0f, 1.0));
 390                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 391                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); //   0
 392                                         points.insert (std::pair<float,float>(-11.0f, 1.0)); //  +3
 393                                         points.insert (std::pair<float,float>(-10.0f, 0.8)); //  +4
 394                                         points.insert (std::pair<float,float>( -8.0f, 1.0)); //  +6
 395                                         points.insert (std::pair<float,float>( -4.0f, 1.0)); // +10
 396                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 397                                         break;
 398                                 case MeterK20:
 399                                         points.insert (std::pair<float,float>(-60.0f, 1.0));
 400                                         points.insert (std::pair<float,float>(-50.0f, 1.0));
 401                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 402                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 403                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 404                                         points.insert (std::pair<float,float>(-23.0f, 1.0));
 405                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); //  0
 406                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 407                                         points.insert (std::pair<float,float>(-16.0f, 0.8));
 408                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); // +6
 409                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 410                                         points.insert (std::pair<float,float>( -5.0f, 1.0));
 411                                         points.insert (std::pair<float,float>(  0.0f, 1.0)); //+20
 412                                         break;
 413                                 case MeterIEC2EBU:
 414                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 415                                         points.insert (std::pair<float,float>(-28.0f, 0.5));
 416                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 417                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 418                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 419                                         points.insert (std::pair<float,float>(-20.0f, 0.5));
 420                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 421                                         points.insert (std::pair<float,float>(-16.0f, 0.5));
 422                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 423                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 424                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 425                                         points.insert (std::pair<float,float>( -9.0f, 0.8));
 426                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 427                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 428                                         break;
 429                                 case MeterIEC2BBC:
 430                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 431                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 432                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 433                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 434                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 435                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 436                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 437                                         break;
 438                                 case MeterIEC1NOR:
 439                                         points.insert (std::pair<float,float>(-60.0f, 1.0)); // -42
 440                                         points.insert (std::pair<float,float>(-57.0f, 0.5));
 441                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 442                                         points.insert (std::pair<float,float>(-51.0f, 0.5));
 443                                         points.insert (std::pair<float,float>(-48.0f, 1.0));
 444                                         points.insert (std::pair<float,float>(-45.0f, 0.5));
 445                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 446                                         points.insert (std::pair<float,float>(-39.0f, 0.5));
 447                                         points.insert (std::pair<float,float>(-36.0f, 1.0));
 448
 449                                         points.insert (std::pair<float,float>(-33.0f, 0.5));
 450                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 451                                         points.insert (std::pair<float,float>(-27.0f, 0.5));
 452                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 453                                         points.insert (std::pair<float,float>(-21.0f, 0.5));
 454
 455                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 456                                         points.insert (std::pair<float,float>(-15.0f, 0.5));
 457                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 458                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 459                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 460                                         mtr_red_stripe(cr, box_l, box_w, height,
 461                                                         meter_deflect_nordic(-6.0f), meter_deflect_nordic(-12.0f));
 462                                         break;
 463                                 case MeterIEC1DIN:
 464                                         points.insert (std::pair<float,float>( -3.0f, 0.5)); // "200%"
 465                                         points.insert (std::pair<float,float>( -4.0f, 1.0));
 466                                         points.insert (std::pair<float,float>( -5.0f, 0.5));
 467                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 468                                         points.insert (std::pair<float,float>( -7.0f, 0.5));
 469                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 470                                         points.insert (std::pair<float,float>( -9.0f, 1.0)); // "100%"
 471                                         points.insert (std::pair<float,float>(-10.0f, 0.5));
 472                                         points.insert (std::pair<float,float>(-11.0f, 0.5));
 473                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 474                                         points.insert (std::pair<float,float>(-13.0f, 0.5));
 475                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 476                                         points.insert (std::pair<float,float>(-15.0f, 0.8)); // "50%"
 477                                         points.insert (std::pair<float,float>(-18.0f, 0.8)); // "-9"
 478                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 479                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 480                                         points.insert (std::pair<float,float>(-29.0f, 1.0)); // "-20", "10%"
 481                                         points.insert (std::pair<float,float>(-34.0f, 0.5)); // -25
 482                                         //points.insert (std::pair<float,float>(-35.0f, 0.5)); // "5%" " -20"
 483                                         points.insert (std::pair<float,float>(-39.0f, 1.0));
 484                                         points.insert (std::pair<float,float>(-49.0f, 1.0));
 485                                         points.insert (std::pair<float,float>(-54.0f, 0.5));
 486                                         points.insert (std::pair<float,float>(-59.0f, 1.0));
 487                                         mtr_red_stripe(cr, box_l, box_w, height,
 488                                                         meter_deflect_din(0.0f), meter_deflect_din(-9.0f));
 489                                         break;
 490                                 case MeterVU:
 491                                         points.insert (std::pair<float,float>(-17.0f, 1.0)); //+3 VU
 492                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 493                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 494                                         points.insert (std::pair<float,float>(-19.5f, 0.5));
 495                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); // 0 VU
 496                                         points.insert (std::pair<float,float>(-20.5f, 0.5));
 497                                         points.insert (std::pair<float,float>(-21.0f, 1.0));
 498                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 499                                         points.insert (std::pair<float,float>(-23.0f, 1.0)); //-3 VU
 500                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 501                                         points.insert (std::pair<float,float>(-25.0f, 1.0));
 502                                         points.insert (std::pair<float,float>(-26.0f, 0.5));
 503                                         points.insert (std::pair<float,float>(-27.0f, 1.0)); //-7 VU
 504                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 505                                         points.insert (std::pair<float,float>(-35.0f, 0.5));
 506                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 507                                         mtr_red_stripe(cr, box_l, box_w, height,
 508                                                         meter_deflect_vu(-17.0f), meter_deflect_vu(-20.0f));
 509                                         break;
 510
 511                                 default:
 512                                         points.insert (std::pair<float,float>(  0, 1.0));
 513                                         points.insert (std::pair<float,float>(  1, 0.5));
 514                                         points.insert (std::pair<float,float>(  2, 0.5));
 515                                         points.insert (std::pair<float,float>(  3, 1.0));
 516                                         points.insert (std::pair<float,float>(  4, 0.5));
 517                                         points.insert (std::pair<float,float>(  5, 0.5));
 518                                         /* fall through */
 519                                 case MeterPeak0dB:
 520                                         points.insert (std::pair<float,float>(-60, 0.5));
 521                                         points.insert (std::pair<float,float>(-50, 1.0));
 522                                         points.insert (std::pair<float,float>(-40, 1.0));
 523                                         points.insert (std::pair<float,float>(-30, 1.0));
 524                                         if (UIConfiguration::instance().get_meter_line_up_level() == MeteringLineUp24) {
 525                                                 points.insert (std::pair<float,float>(-24, 1.0));
 526                                         } else {
 527                                                 points.insert (std::pair<float,float>(-25, 1.0));
 528                                         }
 529                                         points.insert (std::pair<float,float>(-20, 1.0));
 530
 531                                         points.insert (std::pair<float,float>(-19, 0.5));
 532                                         points.insert (std::pair<float,float>(-18, 1.0));
 533                                         points.insert (std::pair<float,float>(-17, 0.5));
 534                                         points.insert (std::pair<float,float>(-16, 0.5));
 535                                         points.insert (std::pair<float,float>(-15, 1.0));
 536
 537                                         points.insert (std::pair<float,float>(-14, 0.5));
 538                                         points.insert (std::pair<float,float>(-13, 0.5));
 539                                         points.insert (std::pair<float,float>(-12, 0.5));
 540                                         points.insert (std::pair<float,float>(-11, 0.5));
 541                                         points.insert (std::pair<float,float>(-10, 1.0));
 542
 543                                         points.insert (std::pair<float,float>( -9, 1.0));
 544                                         points.insert (std::pair<float,float>( -8, 0.5));
 545                                         points.insert (std::pair<float,float>( -7, 0.5));
 546                                         points.insert (std::pair<float,float>( -6, 0.5));
 547                                         points.insert (std::pair<float,float>( -5, 1.0));
 548                                         points.insert (std::pair<float,float>( -4, 0.5));
 549                                         points.insert (std::pair<float,float>( -3, 1.0));
 550                                         points.insert (std::pair<float,float>( -2, 0.5));
 551                                         points.insert (std::pair<float,float>( -1, 0.5));
 552                                         break;
 553                         }
 554                         break;
 555
 556                 case DataType::MIDI:
 557                         points.insert (std::pair<float,float>(  0, 1.0));
 558                         points.insert (std::pair<float,float>( 16, 0.5));
 559                         points.insert (std::pair<float,float>( 32, 0.5));
 560                         points.insert (std::pair<float,float>( 48, 0.5));
 561                         points.insert (std::pair<float,float>( 64, 1.0));
 562                         points.insert (std::pair<float,float>( 80, 0.5));
 563                         points.insert (std::pair<float,float>( 96, 0.5));
 564                         points.insert (std::pair<float,float>(100, 1.0));
 565                         points.insert (std::pair<float,float>(112, 0.5));
 566                         points.insert (std::pair<float,float>(127, 1.0));
 567                         break;
 568                 }
 569
 570                 for (std::map<float,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
 571                         cairo_set_line_width (cr, (j->second));
 572
 573                         float fraction = 0;
 574                         gint pos;
 575
 576                         switch (*i) {
 577                         case DataType::AUDIO:
 578                                 fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 579
 580                                 pos = height - (gint) floor (height * fraction);
 581                                 pos = max (pos, 1);
 582                                 cairo_move_to(cr, 0, pos + .5);
 583                                 cairo_line_to(cr, width, pos + .5);
 584                                 cairo_stroke (cr);
 585                                 break;
 586                         case DataType::MIDI:
 587                                 fraction = (j->first) / 127.0;
 588                                 pos = 1 + height - (gint) floor (height * fraction);
 589                                 pos = min (pos, height);
 590                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 591                                 cairo_arc(cr, width * .5, pos + .5, 1.0, 0, 2 * M_PI);
 592                                 cairo_fill(cr);
 593                                 break;
 594                         }
 595                 }
 596         }
 597
 598         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 599
 600         cairo_destroy (cr);
 601         cairo_surface_destroy (surface);
 602
 603         return pattern;
 604 }
 605
 606 static cairo_pattern_t*
 607 meter_render_metrics (Gtk::Widget& w, MeterType type, vector<DataType> types)
 608 {
 609         Glib::RefPtr<Gdk::Window> win (w.get_window());
 610
 611         bool tickleft, tickright;
 612         bool background;
 613         int overlay_midi = 1;
 614         gint width, height;
 615         win->get_size (width, height);
 616
 617         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 618         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 619         background = types.size() == 0 || tickleft || tickright;
 620
 621         if (!tickleft && !tickright) {
 622                 tickright = true;
 623         }
 624
 625 #ifdef NO_OVERSAMPLE
 626         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 627         cairo_t* cr = cairo_create (surface);
 628 #else
 629         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width*2, height*2);
 630         cairo_t* cr = cairo_create (surface);
 631         cairo_scale(cr, 2.0, 2.0);
 632 #endif
 633         Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
 634
 635         Pango::AttrList audio_font_attributes;
 636         Pango::AttrList midi_font_attributes;
 637         Pango::AttrList unit_font_attributes;
 638
 639         Pango::AttrFontDesc* font_attr;
 640         Pango::FontDescription font;
 641
 642         font = Pango::FontDescription (UIConfiguration::instance().get_SmallMonospaceFont());
 643 #ifdef __APPLE__
 644         const double fixfontsize = 1.0;
 645 #else
 646         // counter-act global font-scaling.
 647         const double fixfontsize = std::min(1.0, 0.9 / sqrtf(UIConfiguration::instance().get_ui_scale()));
 648 #endif
 649
 650         font.set_weight (Pango::WEIGHT_NORMAL);
 651         font.set_size (8.0 * fixfontsize * PANGO_SCALE);
 652         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 653         audio_font_attributes.change (*font_attr);
 654         delete font_attr;
 655
 656         font.set_weight (Pango::WEIGHT_ULTRALIGHT);
 657         font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
 658         font.set_size (7.0 * fixfontsize * PANGO_SCALE);
 659         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 660         midi_font_attributes.change (*font_attr);
 661         delete font_attr;
 662
 663         font.set_size (6.0 * fixfontsize * PANGO_SCALE);
 664         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 665         unit_font_attributes.change (*font_attr);
 666         delete font_attr;
 667
 668         cairo_move_to (cr, 0, 0);
 669         cairo_rectangle (cr, 0, 0, width, height);
 670         if (background) {
 671                 /* meterbridge */
 672                 set_bg_color(w, cr, type);
 673         } else {
 674                 /* mixer */
 675                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 676                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 677         }
 678         cairo_fill (cr);
 679
 680         cairo_set_line_width (cr, 1.0);
 681
 682         height = min(max_pattern_metric_size, height);
 683         uint32_t peakcolor = UIConfiguration::instance().color ("meterbridge peaklabel");
 684         Gdk::Color c; // default text color
 685
 686         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 687
 688                 if (types.size() > 1 && (*i) == DataType::MIDI && overlay_midi == 0) {
 689                         continue;
 690                 }
 691
 692                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 693                         /* we're overlaying more than 1 set of marks, so use different colours */
 694                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 695                 } else if (background) {
 696                         set_fg_color(w, type, &c);
 697                 } else {
 698                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 699                 }
 700
 701                 std::map<float,string> points; // map: label-pos in dBFS, label-text
 702
 703                 switch (*i) {
 704                 case DataType::AUDIO:
 705                         layout->set_attributes (audio_font_attributes);
 706                         if (type == MeterPeak0dB) {
 707                                 overlay_midi = 4;
 708                         }
 709                         switch (type) {
 710                                 case MeterK12:
 711                                         overlay_midi = 0;
 712                                         points.insert (std::pair<float,string>(-52.0f, "-40"));
 713                                         points.insert (std::pair<float,string>(-42.0f, "-30"));
 714                                         points.insert (std::pair<float,string>(-32.0f, "-20"));
 715                                         points.insert (std::pair<float,string>(-22.0f, "-10"));
 716                                         points.insert (std::pair<float,string>(-18.0f,  "-6"));
 717                                         points.insert (std::pair<float,string>(-15.0f,  "-3"));
 718                                         points.insert (std::pair<float,string>(-12.0f,  " 0"));
 719                                         points.insert (std::pair<float,string>( -9.0f,  "+3"));
 720                                         points.insert (std::pair<float,string>( -6.0f,  "+6"));
 721                                         points.insert (std::pair<float,string>( -3.0f,  "+9"));
 722                                         points.insert (std::pair<float,string>(  0.0f, "+12"));
 723                                         break;
 724                                 case MeterK14:
 725                                         overlay_midi = 0;
 726                                         points.insert (std::pair<float,string>(-54.0f, "-40"));
 727                                         points.insert (std::pair<float,string>(-44.0f, "-30"));
 728                                         points.insert (std::pair<float,string>(-34.0f, "-20"));
 729                                         points.insert (std::pair<float,string>(-24.0f, "-10"));
 730                                         points.insert (std::pair<float,string>(-20.0f,  "-6"));
 731                                         points.insert (std::pair<float,string>(-17.0f,  "-3"));
 732                                         points.insert (std::pair<float,string>(-14.0f,  " 0"));
 733                                         points.insert (std::pair<float,string>(-11.0f,  "+3"));
 734                                         points.insert (std::pair<float,string>( -8.0f,  "+6"));
 735                                         points.insert (std::pair<float,string>( -4.0f, "+10"));
 736                                         points.insert (std::pair<float,string>(  0.0f, "+14"));
 737                                         break;
 738                                 case MeterK20:
 739                                         overlay_midi = 0;
 740                                         points.insert (std::pair<float,string>(-60.0f, "-40"));
 741                                         points.insert (std::pair<float,string>(-50.0f, "-30"));
 742                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 743                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 744                                         points.insert (std::pair<float,string>(-26.0f,  "-6"));
 745                                         points.insert (std::pair<float,string>(-23.0f,  "-3"));
 746                                         points.insert (std::pair<float,string>(-20.0f,  " 0"));
 747                                         points.insert (std::pair<float,string>(-17.0f,  "+3"));
 748                                         points.insert (std::pair<float,string>(-14.0f,  "+6"));
 749                                         points.insert (std::pair<float,string>(-10.0f, "+10"));
 750                                         points.insert (std::pair<float,string>( -5.0f, "+15"));
 751                                         points.insert (std::pair<float,string>(  0.0f, "+20"));
 752                                         break;
 753                                 case MeterPeak:
 754                                         /* fall through */
 755                                 case MeterKrms:
 756                                         /* fall through */
 757                                 default:
 758                                         points.insert (std::pair<float,string>(  3.0f, "+3"));
 759                                         /* fall through */
 760                                 case MeterPeak0dB:
 761                                         points.insert (std::pair<float,string>(-50.0f, "-50"));
 762                                         points.insert (std::pair<float,string>(-40.0f, "-40"));
 763                                         points.insert (std::pair<float,string>(-30.0f, "-30"));
 764                                         points.insert (std::pair<float,string>(-20.0f, "-20"));
 765                                         if (types.size() == 1) {
 766                                                 if (UIConfiguration::instance().get_meter_line_up_level() == MeteringLineUp24) {
 767                                                         points.insert (std::pair<float,string>(-24.0f, "-24"));
 768                                                 } else {
 769                                                         points.insert (std::pair<float,string>(-25.0f, "-25"));
 770                                                 }
 771                                                 points.insert (std::pair<float,string>(-15.0f, "-15"));
 772                                         }
 773                                         points.insert (std::pair<float,string>(-18.0f, "-18"));
 774                                         points.insert (std::pair<float,string>(-10.0f, "-10"));
 775                                         points.insert (std::pair<float,string>( -5.0f, "-5"));
 776                                         points.insert (std::pair<float,string>( -3.0f, "-3"));
 777                                         points.insert (std::pair<float,string>(  0.0f, "+0"));
 778                                         break;
 779
 780                                 case MeterIEC2EBU:
 781                                         overlay_midi = 3;
 782                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 783                                         points.insert (std::pair<float,string>(-26.0f, "-8"));
 784                                         points.insert (std::pair<float,string>(-22.0f, "-4"));
 785                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 786                                         points.insert (std::pair<float,string>(-14.0f, "+4"));
 787                                         points.insert (std::pair<float,string>(-10.0f, "+8"));
 788                                         points.insert (std::pair<float,string>( -6.0f, "+12"));
 789                                         break;
 790
 791                                 case MeterIEC2BBC:
 792                                         overlay_midi = 3;
 793                                         points.insert (std::pair<float,string>(-30.0f, " 1 "));
 794                                         points.insert (std::pair<float,string>(-26.0f, " 2 "));
 795                                         points.insert (std::pair<float,string>(-22.0f, " 3 "));
 796                                         points.insert (std::pair<float,string>(-18.0f, " 4 "));
 797                                         points.insert (std::pair<float,string>(-14.0f, " 5 "));
 798                                         points.insert (std::pair<float,string>(-10.0f, " 6 "));
 799                                         points.insert (std::pair<float,string>( -6.0f, " 7 "));
 800                                         break;
 801
 802                                 case MeterIEC1NOR:
 803                                         overlay_midi = 0;
 804                                         //points.insert (std::pair<float,string>(-60.0f, "-42"));
 805                                         points.insert (std::pair<float,string>(-54.0f, "-36"));
 806                                         points.insert (std::pair<float,string>(-48.0f, "-30"));
 807                                         points.insert (std::pair<float,string>(-42.0f, "-24"));
 808                                         points.insert (std::pair<float,string>(-36.0f, "-18"));
 809
 810                                         //points.insert (std::pair<float,string>(-33.0f, "-15"));
 811                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 812                                         //points.insert (std::pair<float,string>(-27.0f, "-9"));
 813                                         points.insert (std::pair<float,string>(-24.0f, "-6"));
 814                                         //points.insert (std::pair<float,string>(-21.0f, "-3"));
 815
 816                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 817                                         //points.insert (std::pair<float,string>(-15.0f, "+3"));
 818                                         points.insert (std::pair<float,string>(-12.0f, "+6"));
 819                                         points.insert (std::pair<float,string>( -9.0f, "+9"));
 820                                         //points.insert (std::pair<float,string>( -6.0f, "+12"));
 821                                         break;
 822
 823                                 case MeterIEC1DIN:
 824                                         overlay_midi = 2;
 825                                         //points.insert (std::pair<float,string>( -3.0f, "200%"));
 826                                         points.insert (std::pair<float,string>( -4.0f, "+5"));
 827                                         points.insert (std::pair<float,string>( -9.0f, "0")); // "100%";
 828                                         points.insert (std::pair<float,string>(-14.0f, "-5"));
 829                                         //points.insert (std::pair<float,string>(-15.0f, "50%"));
 830                                         //points.insert (std::pair<float,string>(-18.0f, "-9"));
 831                                         points.insert (std::pair<float,string>(-19.0f, "-10")); // "30%"
 832                                         points.insert (std::pair<float,string>(-29.0f, "-20")); // "10%"
 833                                         //points.insert (std::pair<float,string>(-35.0f, "5%")); // "5%"
 834                                         points.insert (std::pair<float,string>(-39.0f, "-30"));
 835                                         //points.insert (std::pair<float,string>(-49.0f, "1%"));
 836                                         points.insert (std::pair<float,string>(-59.0f, "-50"));
 837                                         break;
 838
 839                                 case MeterVU:
 840                                         overlay_midi = 0;
 841                                         points.insert (std::pair<float,string>(-17.0f, "+3"));
 842                                         points.insert (std::pair<float,string>(-18.0f, "+2"));
 843                                         points.insert (std::pair<float,string>(-19.0f, "+1"));
 844                                         points.insert (std::pair<float,string>(-20.0f, " 0"));
 845                                         points.insert (std::pair<float,string>(-21.0f, "-1"));
 846                                         points.insert (std::pair<float,string>(-22.0f, "-2"));
 847                                         points.insert (std::pair<float,string>(-23.0f, "-3"));
 848                                         points.insert (std::pair<float,string>(-25.0f, "-5"));
 849                                         points.insert (std::pair<float,string>(-27.0f, "-7"));
 850                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 851                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 852                                         break;
 853                         }
 854                         break;
 855                 case DataType::MIDI:
 856                         layout->set_attributes (midi_font_attributes);
 857                         if (types.size() == 1) {
 858                                 points.insert (std::pair<float,string>(  0, "0"));
 859                                 points.insert (std::pair<float,string>( 16,  "16"));
 860                                 points.insert (std::pair<float,string>( 32,  "32"));
 861                                 points.insert (std::pair<float,string>( 48,  "48"));
 862                                 points.insert (std::pair<float,string>( 64,  "64"));
 863                                 points.insert (std::pair<float,string>( 80,  "80"));
 864                                 points.insert (std::pair<float,string>( 96,  "96"));
 865                                 points.insert (std::pair<float,string>(100, "100"));
 866                                 points.insert (std::pair<float,string>(112, "112"));
 867                                 points.insert (std::pair<float,string>(127, "127"));
 868                         } else {
 869                                 switch (overlay_midi) {
 870                                         case 1:
 871                                                 /* labels that don't overlay with dBFS */
 872                                                 points.insert (std::pair<float,string>(  0, "0"));
 873                                                 points.insert (std::pair<float,string>( 24, "24"));
 874                                                 points.insert (std::pair<float,string>( 48, "48"));
 875                                                 points.insert (std::pair<float,string>( 72, "72"));
 876                                                 points.insert (std::pair<float,string>(127, "127"));
 877                                                 break;
 878                                         case 2:
 879                                                 /* labels that don't overlay with DIN */
 880                                                 points.insert (std::pair<float,string>(  0, "0"));
 881                                                 points.insert (std::pair<float,string>( 16,  "16"));
 882                                                 points.insert (std::pair<float,string>( 40,  "40"));
 883                                                 points.insert (std::pair<float,string>( 64,  "64"));
 884                                                 points.insert (std::pair<float,string>(112, "112"));
 885                                                 points.insert (std::pair<float,string>(127, "127"));
 886                                                 break;
 887                                         case 3:
 888                                                 /* labels that don't overlay with BBC nor EBU*/
 889                                                 points.insert (std::pair<float,string>(  0, "0"));
 890                                                 points.insert (std::pair<float,string>( 16, "16"));
 891                                                 points.insert (std::pair<float,string>( 56, "56"));
 892                                                 points.insert (std::pair<float,string>( 72, "72"));
 893                                                 points.insert (std::pair<float,string>(112, "112"));
 894                                                 points.insert (std::pair<float,string>(127, "127"));
 895                                                 break;
 896                                         case 4:
 897                                                 /* labels that don't overlay with 0dBFS*/
 898                                                 points.insert (std::pair<float,string>(  0, "0"));
 899                                                 points.insert (std::pair<float,string>( 16, "16"));
 900                                                 points.insert (std::pair<float,string>( 48, "48"));
 901                                                 points.insert (std::pair<float,string>( 84, "84"));
 902                                                 points.insert (std::pair<float,string>(100, "100"));
 903                                         default:
 904                                                 break;
 905                                 }
 906                         }
 907                         break;
 908                 }
 909
 910                 gint pos = -1;
 911
 912                 for (std::map<float,string>::const_iterator j = points.begin(); j != points.end(); ++j) {
 913                         float fraction = 0;
 914                         bool align_center = background; // this is true for meterbridge meters w/ fixed background
 915                         switch (*i) {
 916                                 case DataType::AUDIO:
 917                                         fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 918
 919                                         pos = height - (gint) floor (height * fraction);
 920                                         pos = max (pos, 1);
 921                                         if (tickleft) {
 922                                                 cairo_move_to(cr, width-1.5, pos + .5);
 923                                                 cairo_line_to(cr, width, pos + .5);
 924                                                 cairo_stroke (cr);
 925                                         } else if (tickright) {
 926                                                 cairo_move_to(cr, 0, pos + .5);
 927                                                 cairo_line_to(cr, 1.5, pos + .5);
 928                                                 cairo_stroke (cr);
 929                                         }
 930                                         break;
 931                                 case DataType::MIDI:
 932                                         align_center = false; // don't bleed into legend
 933                                         fraction = (j->first) / 127.0;
 934                                         pos = 1 + height - (gint) lrintf (height * fraction);
 935                                         pos = min (pos, height);
 936                                         break;
 937                         }
 938
 939                         if (pos < 0) continue;
 940
 941                         layout->set_text(j->second.c_str());
 942
 943                         int tw, th;
 944                         layout->get_pixel_size(tw, th);
 945
 946                         int p = pos - (th / 2) - 1;
 947                         p = min (p, height - th);
 948                         p = max (p, 0);
 949
 950                         if (align_center) {
 951                                 cairo_move_to (cr, (width-tw)/2.0, p);
 952                         } else {
 953                                 cairo_move_to (cr, width-3-tw, p);
 954                         }
 955
 956                         cairo_set_line_width(cr, 0.12);
 957                         cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
 958                         pango_cairo_layout_path(cr, layout->gobj());
 959                         cairo_stroke_preserve (cr);
 960                         cairo_set_line_width(cr, 1.0);
 961
 962                         if ((*i) == DataType::AUDIO) {
 963                                 mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 964                         } else {
 965                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 966                         }
 967
 968                         pango_cairo_show_layout (cr, layout->gobj());
 969                         cairo_new_path(cr);
 970                 }
 971         }
 972
 973         // add legend
 974         if (types.size() == 1 || overlay_midi == 0) {
 975                 int tw, th;
 976                 layout->set_attributes (unit_font_attributes);
 977                 switch (types.at(0)) {
 978                         case DataType::AUDIO:
 979                                 switch (type) {
 980                                         case MeterK20:
 981                                                 layout->set_text("K20");
 982                                                 break;
 983                                         case MeterK14:
 984                                                 layout->set_text("K14");
 985                                                 break;
 986                                         case MeterK12:
 987                                                 layout->set_text("K12");
 988                                                 break;
 989                                         default:
 990                                         case MeterPeak:
 991                                         case MeterPeak0dB:
 992                                         case MeterKrms:
 993                                                 layout->set_text("dBFS");
 994                                                 break;
 995                                         case MeterIEC2EBU:
 996                                                 layout->set_text("EBU");
 997                                                 break;
 998                                         case MeterIEC2BBC:
 999                                                 layout->set_text("BBC");
1000                                                 break;
1001                                         case MeterIEC1DIN:
1002                                                 layout->set_text("DIN");
1003                                                 break;
1004                                         case MeterIEC1NOR:
1005                                                 layout->set_text("NOR");
1006                                                 break;
1007                                         case MeterVU:
1008                                                 layout->set_text("VU");
1009                                                 break;
1010                                 }
1011                                 layout->get_pixel_size(tw, th);
1012                                 break;
1013                         case DataType::MIDI:
1014                                 layout->set_text("mid");
1015                                 layout->get_pixel_size(tw, th);
1016                                 break;
1017                         default: // DataType::NIL;
1018                                 layout->set_text("");
1019                                 tw = th = 0;
1020                                 assert (0); // not reached
1021                                 break;
1022                 }
1023                 if (!background) {
1024                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
1025                 }
1026                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
1027                 if (tickleft) {
1028                         cairo_move_to (cr, width - 2 - tw, height - th - 0.5);
1029                 } else {
1030                         cairo_move_to (cr, 2, height - th - 0.5);
1031                 }
1032                 pango_cairo_show_layout (cr, layout->gobj());
1033         }
1034
1035         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
1036
1037         cairo_destroy (cr);
1038         cairo_surface_destroy (surface);
1039
1040         return pattern;
1041 }
1042
1043 gint
1044 ArdourMeter::meter_expose_ticks (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mta)
1045 {
1046         Glib::RefPtr<Gdk::Window> win (mta->get_window());
1047         cairo_t* cr;
1048
1049         cr = gdk_cairo_create (win->gobj());
1050
1051         /* clip to expose area */
1052
1053         gdk_cairo_rectangle (cr, &ev->area);
1054         cairo_clip (cr);
1055
1056         cairo_pattern_t* pattern;
1057         const MeterMatricsMapKey key (mta->get_name(), type, types_to_bit(types));
1058         MetricPatternMap::iterator i = ticks_patterns.find (key);
1059
1060         if (i == ticks_patterns.end()) {
1061                 pattern = meter_render_ticks (*mta, type, types);
1062                 ticks_patterns[key] = pattern;
1063         } else {
1064                 pattern = i->second;
1065         }
1066
1067         cairo_move_to (cr, 0, 0);
1068         cairo_set_source (cr, pattern);
1069
1070         gint width, height;
1071         win->get_size (width, height);
1072
1073         cairo_rectangle (cr, 0, 0, width, height);
1074         cairo_fill (cr);
1075
1076         cairo_destroy (cr);
1077
1078         return true;
1079 }
1080
1081 gint
1082 ArdourMeter::meter_expose_metrics (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mma)
1083 {
1084         Glib::RefPtr<Gdk::Window> win (mma->get_window());
1085         cairo_t* cr;
1086
1087         cr = gdk_cairo_create (win->gobj());
1088
1089         /* clip to expose area */
1090
1091         gdk_cairo_rectangle (cr, &ev->area);
1092         cairo_clip (cr);
1093
1094         cairo_pattern_t* pattern;
1095         const MeterMatricsMapKey key (mma->get_name(), type, types_to_bit(types));
1096         MetricPatternMap::iterator i = metric_patterns.find (key);
1097
1098         if (i == metric_patterns.end()) {
1099                 pattern = meter_render_metrics (*mma, type, types);
1100                 metric_patterns[key] = pattern;
1101         } else {
1102                 pattern = i->second;
1103         }
1104
1105         cairo_move_to (cr, 0, 0);
1106
1107         gint width, height;
1108         win->get_size (width, height);
1109 #ifdef NO_OVERSAMPLE
1110         cairo_set_source (cr, pattern);
1111         cairo_rectangle (cr, 0, 0, width, height);
1112 #else
1113         cairo_scale(cr, 0.5, 0.5);
1114         cairo_set_antialias(cr, CAIRO_ANTIALIAS_BEST);
1115         cairo_set_source (cr, pattern);
1116         cairo_rectangle (cr, 0, 0, width * 2., height * 2.);
1117 #endif
1118
1119         cairo_fill (cr);
1120
1121         cairo_destroy (cr);
1122
1123         return true;
1124 }
1125
1126 void
1127 ArdourMeter::meter_clear_pattern_cache(int which) {
1128         MetricPatternMap::iterator i = metric_patterns.begin();
1129         MetricPatternMap::iterator j = ticks_patterns.begin();
1130
1131         while (i != metric_patterns.end()) {
1132                 int m = 4;
1133                 MeterMatricsMapKey const * const key = &(i->first);
1134                 std::string n = key->_n;
1135                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1136                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1137                 if (which & m) {
1138                         cairo_pattern_destroy(i->second);
1139                         metric_patterns.erase(i++);
1140                 } else {
1141                         ++i;
1142                 }
1143         }
1144
1145         while (j != ticks_patterns.end()) {
1146                 int m = 4;
1147                 MeterMatricsMapKey const * const key = &(j->first);
1148                 std::string n = key->_n;
1149                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1150                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1151                 if (which & m) {
1152                         cairo_pattern_destroy(j->second);
1153                         ticks_patterns.erase(j++);
1154                 } else {
1155                         ++j;
1156                 }
1157         }
1158         RedrawMetrics();
1159 }