gtk2_ardour/meter_patterns.cc

   1 /*
   2  * Copyright (C) 2013-2019 Robin Gareus <robin@gareus.org>
   3  * Copyright (C) 2014-2016 Paul Davis <paul@linuxaudiosystems.com>
   4  * Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <gtkmm/drawingarea.h>
  22
  23 #include <gtkmm2ext/cairo_widget.h>
  24 #include <gtkmm2ext/gtk_ui.h>
  25 #include <gtkmm2ext/utils.h>
  26 #include <gtkmm2ext/rgb_macros.h>
  27
  28 #include "ardour/logmeter.h"
  29 #include <ardour/rc_configuration.h>
  30
  31 #include "utils.h"
  32 #include "meter_patterns.h"
  33 #include "ui_config.h"
  34
  35 #include "pbd/i18n.h"
  36
  37 using namespace ARDOUR;
  38 using namespace ARDOUR_UI_UTILS;
  39 using namespace PBD;
  40 using namespace Gtk;
  41 using namespace Gtkmm2ext;
  42 using namespace std;
  43 using namespace ArdourMeter;
  44
  45 static const int max_pattern_metric_size = 1026;
  46
  47 /* signals used by meters */
  48
  49 sigc::signal<void> ArdourMeter::ResetAllPeakDisplays;
  50 sigc::signal<void,ARDOUR::Route*> ArdourMeter::ResetRoutePeakDisplays;
  51 sigc::signal<void,ARDOUR::RouteGroup*> ArdourMeter::ResetGroupPeakDisplays;
  52 sigc::signal<void> ArdourMeter::RedrawMetrics;
  53
  54 sigc::signal<void, int, ARDOUR::RouteGroup*, ARDOUR::MeterType> ArdourMeter::SetMeterTypeMulti;
  55
  56
  57 /* pattern cache */
  58
  59 struct MeterMatricsMapKey {
  60         MeterMatricsMapKey (std::string n, MeterType t, int dt)
  61                 : _n(n)
  62                 , _t(t)
  63                 , _dt(dt)
  64         {}
  65         inline bool operator<(const MeterMatricsMapKey& rhs) const {
  66                 return (_n < rhs._n) || (_n == rhs._n && _t < rhs._t) || (_n == rhs._n && _t == rhs._t && _dt < rhs._dt);
  67         }
  68         std::string _n;
  69         MeterType _t;
  70         int _dt;
  71 };
  72
  73 namespace ArdourMeter {
  74         typedef std::map<MeterMatricsMapKey, cairo_pattern_t*> MetricPatternMap;
  75 }
  76
  77 static ArdourMeter::MetricPatternMap ticks_patterns;
  78 static ArdourMeter::MetricPatternMap metric_patterns;
  79
  80
  81 const std::string
  82 ArdourMeter::meter_type_string (ARDOUR::MeterType mt)
  83 {
  84         switch (mt) {
  85                 case MeterPeak:
  86                         return _("Peak (+6dBFS)");
  87                         break;
  88                 case MeterPeak0dB:
  89                         return _("Peak (0dBFS)");
  90                         break;
  91                 case MeterKrms:
  92                         return _("RMS + Peak");
  93                         break;
  94                 case MeterIEC1DIN:
  95                         return _("IEC1/DIN");
  96                         break;
  97                 case MeterIEC1NOR:
  98                         return _("IEC1/Nordic");
  99                         break;
 100                 case MeterIEC2BBC:
 101                         return _("IEC2/BBC");
 102                         break;
 103                 case MeterIEC2EBU:
 104                         return _("IEC2/EBU");
 105                         break;
 106                 case MeterK20:
 107                         return _("K20/RMS");
 108                         break;
 109                 case MeterK14:
 110                         return _("K14/RMS");
 111                         break;
 112                 case MeterK12:
 113                         return _("K12/RMS");
 114                         break;
 115                 case MeterVU:
 116                         return _("VU");
 117                         break;
 118                 default:
 119                         assert(0);
 120                         return _("???");
 121                         break;
 122         }
 123 }
 124
 125 static inline int types_to_bit (vector<ARDOUR::DataType> types) {
 126         int rv = 0;
 127         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 128                 rv |= 1 << (*i);
 129         }
 130         return rv;
 131 }
 132
 133 static inline float mtr_col_and_fract(
 134                 cairo_t* cr, Gdk::Color const * const c, const uint32_t peakcolor, const MeterType mt, const float val)
 135 {
 136         float fraction = 0;
 137
 138         switch (mt) {
 139                 default:
 140                 case MeterKrms:
 141                 case MeterPeak:
 142                         fraction = log_meter (val);
 143                         if (val >= 0 || val == -9) {
 144                                 cairo_set_source_rgb (cr,
 145                                                 UINT_RGBA_R_FLT(peakcolor),
 146                                                 UINT_RGBA_G_FLT(peakcolor),
 147                                                 UINT_RGBA_B_FLT(peakcolor));
 148                         } else {
 149                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 150                         }
 151                         break;
 152                 case MeterPeak0dB:
 153                         fraction = log_meter0dB (val);
 154                         if (val >= 0 || val == -9) {
 155                                 cairo_set_source_rgb (cr,
 156                                                 UINT_RGBA_R_FLT(peakcolor),
 157                                                 UINT_RGBA_G_FLT(peakcolor),
 158                                                 UINT_RGBA_B_FLT(peakcolor));
 159                         } else {
 160                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 161                         }
 162                         break;
 163                 case MeterIEC2BBC:
 164                 case MeterIEC2EBU:
 165                         fraction = meter_deflect_ppm(val);
 166                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 167                         break;
 168                 case MeterIEC1NOR:
 169                         fraction = meter_deflect_nordic(val);
 170 #if 0
 171                         if (val == -18.0) {
 172                                 cairo_set_source_rgb (cr,
 173                                                 UINT_RGBA_R_FLT(peakcolor),
 174                                                 UINT_RGBA_G_FLT(peakcolor),
 175                                                 UINT_RGBA_B_FLT(peakcolor));
 176                         } else {
 177                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 178                         }
 179 #else
 180                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 181 #endif
 182                         break;
 183                 case MeterIEC1DIN:
 184                         fraction = meter_deflect_din(val);
 185                         if (val == -9.0 || val == -15 || val == -18) {
 186                                 cairo_set_source_rgb (cr,
 187                                                 UINT_RGBA_R_FLT(peakcolor),
 188                                                 UINT_RGBA_G_FLT(peakcolor),
 189                                                 UINT_RGBA_B_FLT(peakcolor));
 190                         } else {
 191                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 192                         }
 193                         break;
 194                 case MeterVU:
 195                         fraction = meter_deflect_vu(val);
 196                         if (val >= -20.0) {
 197                                 cairo_set_source_rgb (cr,
 198                                                 UINT_RGBA_R_FLT(peakcolor),
 199                                                 UINT_RGBA_G_FLT(peakcolor),
 200                                                 UINT_RGBA_B_FLT(peakcolor));
 201                         } else {
 202                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 203                         }
 204                         break;
 205                 case MeterK20:
 206                         fraction = meter_deflect_k (val, 20);
 207                         if (val >= -16.0) {
 208                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 209                         } else if (val >= -20.0) {
 210                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 211                         } else {
 212                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 213                         }
 214                         break;
 215                 case MeterK14:
 216                         if (val >= -10.0) {
 217                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 218                         } else if (val >= -14.0) {
 219                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 220                         } else {
 221                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 222                         }
 223                         fraction = meter_deflect_k (val, 14);
 224                         break;
 225                 case MeterK12:
 226                         if (val >= -8.0) {
 227                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 228                         } else if (val >= -12.0) {
 229                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 230                         } else {
 231                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 232                         }
 233                         fraction = meter_deflect_k (val, 12);
 234                         break;
 235         }
 236         return fraction;
 237 }
 238
 239 static void mtr_red_stripe(cairo_t* cr, float l, float w, int h, float top, float bot) {
 240         if (w <= 0) return;
 241         int t = h - floorf (h * (top));
 242         int b = h - floorf (h * (bot));
 243         cairo_set_source_rgba (cr, .75, 0, 0, 0.75);
 244         cairo_rectangle (cr, l, t + .5, w, b - t);
 245         cairo_fill (cr);
 246 }
 247
 248 static void set_bg_color (Gtk::Widget& w, cairo_t* cr, MeterType type) {
 249         double r,g,b,a;
 250         switch(type) {
 251                 case MeterVU:
 252                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip vu bg"), r, g, b, a);
 253                         break;
 254                 case MeterIEC1DIN:
 255                 case MeterIEC1NOR:
 256                 case MeterIEC2BBC:
 257                 case MeterIEC2EBU:
 258                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip ppm bg"), r, g, b, a);
 259                         break;
 260                 case MeterK12:
 261                 case MeterK14:
 262                 case MeterK20:
 263                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip dpm bg"), r, g, b, a);
 264                         break;
 265                 default:
 266                         {
 267                         Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_ACTIVE);
 268                         r = c.get_red_p();
 269                         g = c.get_green_p();
 270                         b = c.get_blue_p();
 271                         }
 272                         break;
 273         }
 274         cairo_set_source_rgb (cr, r, g, b);
 275 }
 276
 277 static void set_fg_color(Gtk::Widget&, MeterType type, Gdk::Color * c) {
 278         double r,g,b,a;
 279         switch(type) {
 280                 case MeterVU:
 281                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip vu fg"), r, g, b, a);
 282                         break;
 283                 case MeterIEC1DIN:
 284                 case MeterIEC1NOR:
 285                 case MeterIEC2BBC:
 286                 case MeterIEC2EBU:
 287                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip ppm fg"), r, g, b, a);
 288                         break;
 289                 default:
 290                         Gtkmm2ext::color_to_rgba (UIConfiguration::instance().color ("meterstrip dpm fg"), r, g, b, a);
 291                         break;
 292         }
 293         c->set_rgb_p (r, g, b);
 294 }
 295
 296 static cairo_pattern_t*
 297 meter_render_ticks (Gtk::Widget& w, MeterType type, vector<ARDOUR::DataType> types)
 298 {
 299         Glib::RefPtr<Gdk::Window> win (w.get_window());
 300
 301         bool background;
 302         bool tickleft, tickright;
 303         gint width, height;
 304         win->get_size (width, height);
 305         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 306         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 307         background = types.size() == 0 || tickleft || tickright;
 308
 309         float box_l=0;
 310         float box_w=0;
 311 #define PX_SCALE(pxmin, dflt) rint(std::max((double)pxmin, (double)dflt * UIConfiguration::instance().get_ui_scale()))
 312         if (tickleft) {
 313                 if (w.get_name().substr(0, 3) == "Bar") {
 314                         box_w = PX_SCALE(2, 2);
 315                         box_l = width - box_w;
 316                 } else if (w.get_name().substr(0, 4) == "Mark") {
 317                         box_w = PX_SCALE(2, 2);
 318                         box_l = width - box_w;
 319                         background = false;
 320                 }
 321         } else if (tickright) {
 322                 if (w.get_name().substr(0, 3) == "Bar") {
 323                         box_l = 0; box_w = PX_SCALE(2, 2);
 324                 } else if (w.get_name().substr(0, 4) == "Mark") {
 325                         box_l = 0; box_w = PX_SCALE(2, 2);
 326                         background = false;
 327                 }
 328         } else {
 329                 box_l = 0; box_w = width;
 330         }
 331 #undef PX_SCALE
 332
 333         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 334         cairo_t* cr = cairo_create (surface);
 335
 336         cairo_move_to (cr, 0, 0);
 337         cairo_rectangle (cr, 0, 0, width, height);
 338
 339         if (background) {
 340                 /* meterbridge */
 341                 set_bg_color(w, cr, type);
 342         } else {
 343                 /* mixer */
 344                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 345                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 346         }
 347         cairo_fill (cr);
 348
 349         height = min(max_pattern_metric_size, height);
 350         uint32_t peakcolor = UIConfiguration::instance().color ("meterbridge peaklabel");
 351
 352         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 353
 354                 Gdk::Color c;
 355                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 356                         /* we're overlaying more than 1 set of marks, so use different colours */
 357                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 358                 } else if (background) {
 359                         set_fg_color(w, type, &c);
 360                 } else {
 361                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 362                 }
 363
 364                 // tick-maker position in dBFS, line-thickness
 365                 std::map<float,float> points;
 366
 367                 switch (*i) {
 368                 case DataType::AUDIO:
 369
 370                         switch (type) {
 371                                 case MeterK12:
 372                                         points.insert (std::pair<float,float>(-52.0f, 1.0));
 373                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 374                                         points.insert (std::pair<float,float>(-32.0f, 1.0));
 375                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 376                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 377                                         points.insert (std::pair<float,float>(-15.0f, 1.0));
 378                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 379                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 380                                         points.insert (std::pair<float,float>( -8.0f, 0.8));
 381                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 382                                         points.insert (std::pair<float,float>( -3.0f, 1.0));
 383                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 384                                         break;
 385                                 case MeterK14:
 386                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 387                                         points.insert (std::pair<float,float>(-44.0f, 1.0));
 388                                         points.insert (std::pair<float,float>(-34.0f, 1.0));
 389                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 390                                         points.insert (std::pair<float,float>(-20.0f, 1.0));
 391                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 392                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); //   0
 393                                         points.insert (std::pair<float,float>(-11.0f, 1.0)); //  +3
 394                                         points.insert (std::pair<float,float>(-10.0f, 0.8)); //  +4
 395                                         points.insert (std::pair<float,float>( -8.0f, 1.0)); //  +6
 396                                         points.insert (std::pair<float,float>( -4.0f, 1.0)); // +10
 397                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 398                                         break;
 399                                 case MeterK20:
 400                                         points.insert (std::pair<float,float>(-60.0f, 1.0));
 401                                         points.insert (std::pair<float,float>(-50.0f, 1.0));
 402                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 403                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 404                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 405                                         points.insert (std::pair<float,float>(-23.0f, 1.0));
 406                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); //  0
 407                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 408                                         points.insert (std::pair<float,float>(-16.0f, 0.8));
 409                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); // +6
 410                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 411                                         points.insert (std::pair<float,float>( -5.0f, 1.0));
 412                                         points.insert (std::pair<float,float>(  0.0f, 1.0)); //+20
 413                                         break;
 414                                 case MeterIEC2EBU:
 415                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 416                                         points.insert (std::pair<float,float>(-28.0f, 0.5));
 417                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 418                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 419                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 420                                         points.insert (std::pair<float,float>(-20.0f, 0.5));
 421                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 422                                         points.insert (std::pair<float,float>(-16.0f, 0.5));
 423                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 424                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 425                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 426                                         points.insert (std::pair<float,float>( -9.0f, 0.8));
 427                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 428                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 429                                         break;
 430                                 case MeterIEC2BBC:
 431                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 432                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 433                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 434                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 435                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 436                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 437                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 438                                         break;
 439                                 case MeterIEC1NOR:
 440                                         points.insert (std::pair<float,float>(-60.0f, 1.0)); // -42
 441                                         points.insert (std::pair<float,float>(-57.0f, 0.5));
 442                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 443                                         points.insert (std::pair<float,float>(-51.0f, 0.5));
 444                                         points.insert (std::pair<float,float>(-48.0f, 1.0));
 445                                         points.insert (std::pair<float,float>(-45.0f, 0.5));
 446                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 447                                         points.insert (std::pair<float,float>(-39.0f, 0.5));
 448                                         points.insert (std::pair<float,float>(-36.0f, 1.0));
 449
 450                                         points.insert (std::pair<float,float>(-33.0f, 0.5));
 451                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 452                                         points.insert (std::pair<float,float>(-27.0f, 0.5));
 453                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 454                                         points.insert (std::pair<float,float>(-21.0f, 0.5));
 455
 456                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 457                                         points.insert (std::pair<float,float>(-15.0f, 0.5));
 458                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 459                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 460                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 461                                         mtr_red_stripe(cr, box_l, box_w, height,
 462                                                         meter_deflect_nordic(-6.0f), meter_deflect_nordic(-12.0f));
 463                                         break;
 464                                 case MeterIEC1DIN:
 465                                         points.insert (std::pair<float,float>( -3.0f, 0.5)); // "200%"
 466                                         points.insert (std::pair<float,float>( -4.0f, 1.0));
 467                                         points.insert (std::pair<float,float>( -5.0f, 0.5));
 468                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 469                                         points.insert (std::pair<float,float>( -7.0f, 0.5));
 470                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 471                                         points.insert (std::pair<float,float>( -9.0f, 1.0)); // "100%"
 472                                         points.insert (std::pair<float,float>(-10.0f, 0.5));
 473                                         points.insert (std::pair<float,float>(-11.0f, 0.5));
 474                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 475                                         points.insert (std::pair<float,float>(-13.0f, 0.5));
 476                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 477                                         points.insert (std::pair<float,float>(-15.0f, 0.8)); // "50%"
 478                                         points.insert (std::pair<float,float>(-18.0f, 0.8)); // "-9"
 479                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 480                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 481                                         points.insert (std::pair<float,float>(-29.0f, 1.0)); // "-20", "10%"
 482                                         points.insert (std::pair<float,float>(-34.0f, 0.5)); // -25
 483                                         //points.insert (std::pair<float,float>(-35.0f, 0.5)); // "5%" " -20"
 484                                         points.insert (std::pair<float,float>(-39.0f, 1.0));
 485                                         points.insert (std::pair<float,float>(-49.0f, 1.0));
 486                                         points.insert (std::pair<float,float>(-54.0f, 0.5));
 487                                         points.insert (std::pair<float,float>(-59.0f, 1.0));
 488                                         mtr_red_stripe(cr, box_l, box_w, height,
 489                                                         meter_deflect_din(0.0f), meter_deflect_din(-9.0f));
 490                                         break;
 491                                 case MeterVU:
 492                                         points.insert (std::pair<float,float>(-17.0f, 1.0)); //+3 VU
 493                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 494                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 495                                         points.insert (std::pair<float,float>(-19.5f, 0.5));
 496                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); // 0 VU
 497                                         points.insert (std::pair<float,float>(-20.5f, 0.5));
 498                                         points.insert (std::pair<float,float>(-21.0f, 1.0));
 499                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 500                                         points.insert (std::pair<float,float>(-23.0f, 1.0)); //-3 VU
 501                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 502                                         points.insert (std::pair<float,float>(-25.0f, 1.0));
 503                                         points.insert (std::pair<float,float>(-26.0f, 0.5));
 504                                         points.insert (std::pair<float,float>(-27.0f, 1.0)); //-7 VU
 505                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 506                                         points.insert (std::pair<float,float>(-35.0f, 0.5));
 507                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 508                                         mtr_red_stripe(cr, box_l, box_w, height,
 509                                                         meter_deflect_vu(-17.0f), meter_deflect_vu(-20.0f));
 510                                         break;
 511
 512                                 default:
 513                                         points.insert (std::pair<float,float>(  0, 1.0));
 514                                         points.insert (std::pair<float,float>(  1, 0.5));
 515                                         points.insert (std::pair<float,float>(  2, 0.5));
 516                                         points.insert (std::pair<float,float>(  3, 1.0));
 517                                         points.insert (std::pair<float,float>(  4, 0.5));
 518                                         points.insert (std::pair<float,float>(  5, 0.5));
 519                                         /* fallthrough */
 520                                 case MeterPeak0dB:
 521                                         points.insert (std::pair<float,float>(-60, 0.5));
 522                                         points.insert (std::pair<float,float>(-50, 1.0));
 523                                         points.insert (std::pair<float,float>(-40, 1.0));
 524                                         points.insert (std::pair<float,float>(-30, 1.0));
 525                                         if (UIConfiguration::instance().get_meter_line_up_level() == MeteringLineUp24) {
 526                                                 points.insert (std::pair<float,float>(-24, 1.0));
 527                                         } else {
 528                                                 points.insert (std::pair<float,float>(-25, 1.0));
 529                                         }
 530                                         points.insert (std::pair<float,float>(-20, 1.0));
 531
 532                                         points.insert (std::pair<float,float>(-19, 0.5));
 533                                         points.insert (std::pair<float,float>(-18, 1.0));
 534                                         points.insert (std::pair<float,float>(-17, 0.5));
 535                                         points.insert (std::pair<float,float>(-16, 0.5));
 536                                         points.insert (std::pair<float,float>(-15, 1.0));
 537
 538                                         points.insert (std::pair<float,float>(-14, 0.5));
 539                                         points.insert (std::pair<float,float>(-13, 0.5));
 540                                         points.insert (std::pair<float,float>(-12, 0.5));
 541                                         points.insert (std::pair<float,float>(-11, 0.5));
 542                                         points.insert (std::pair<float,float>(-10, 1.0));
 543
 544                                         points.insert (std::pair<float,float>( -9, 1.0));
 545                                         points.insert (std::pair<float,float>( -8, 0.5));
 546                                         points.insert (std::pair<float,float>( -7, 0.5));
 547                                         points.insert (std::pair<float,float>( -6, 0.5));
 548                                         points.insert (std::pair<float,float>( -5, 1.0));
 549                                         points.insert (std::pair<float,float>( -4, 0.5));
 550                                         points.insert (std::pair<float,float>( -3, 1.0));
 551                                         points.insert (std::pair<float,float>( -2, 0.5));
 552                                         points.insert (std::pair<float,float>( -1, 0.5));
 553                                         break;
 554                         }
 555                         break;
 556
 557                 case DataType::MIDI:
 558                         points.insert (std::pair<float,float>(  0, 1.0));
 559                         points.insert (std::pair<float,float>( 16, 0.5));
 560                         points.insert (std::pair<float,float>( 32, 0.5));
 561                         points.insert (std::pair<float,float>( 48, 0.5));
 562                         points.insert (std::pair<float,float>( 64, 1.0));
 563                         points.insert (std::pair<float,float>( 80, 0.5));
 564                         points.insert (std::pair<float,float>( 96, 0.5));
 565                         points.insert (std::pair<float,float>(100, 1.0));
 566                         points.insert (std::pair<float,float>(112, 0.5));
 567                         points.insert (std::pair<float,float>(127, 1.0));
 568                         break;
 569                 }
 570
 571                 for (std::map<float,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
 572                         cairo_set_line_width (cr, (j->second));
 573
 574                         float fraction = 0;
 575                         gint pos;
 576
 577                         switch (*i) {
 578                         case DataType::AUDIO:
 579                                 fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 580
 581                                 pos = height - (gint) floor (height * fraction);
 582                                 pos = max (pos, 1);
 583                                 cairo_move_to(cr, 0, pos + .5);
 584                                 cairo_line_to(cr, width, pos + .5);
 585                                 cairo_stroke (cr);
 586                                 break;
 587                         case DataType::MIDI:
 588                                 fraction = (j->first) / 127.0;
 589                                 pos = 1 + height - (gint) floor (height * fraction);
 590                                 pos = min (pos, height);
 591                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 592                                 cairo_arc(cr, width * .5, pos + .5, 1.0, 0, 2 * M_PI);
 593                                 cairo_fill(cr);
 594                                 break;
 595                         }
 596                 }
 597         }
 598
 599         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 600
 601         cairo_destroy (cr);
 602         cairo_surface_destroy (surface);
 603
 604         return pattern;
 605 }
 606
 607 static cairo_pattern_t*
 608 meter_render_metrics (Gtk::Widget& w, MeterType type, vector<DataType> types)
 609 {
 610         Glib::RefPtr<Gdk::Window> win (w.get_window());
 611
 612         bool tickleft, tickright;
 613         bool background;
 614         int overlay_midi = 1;
 615         gint width, height;
 616         win->get_size (width, height);
 617
 618         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 619         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 620         background = types.size() == 0 || tickleft || tickright;
 621
 622         if (!tickleft && !tickright) {
 623                 tickright = true;
 624         }
 625
 626 #ifdef NO_OVERSAMPLE
 627         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 628         cairo_t* cr = cairo_create (surface);
 629 #else
 630         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width*2, height*2);
 631         cairo_t* cr = cairo_create (surface);
 632         cairo_scale(cr, 2.0, 2.0);
 633 #endif
 634         Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
 635
 636         Pango::AttrList audio_font_attributes;
 637         Pango::AttrList midi_font_attributes;
 638         Pango::AttrList unit_font_attributes;
 639
 640         Pango::AttrFontDesc* font_attr;
 641         Pango::FontDescription font;
 642
 643         font = Pango::FontDescription (UIConfiguration::instance().get_SmallMonospaceFont());
 644 #ifdef __APPLE__
 645         const double fixfontsize = 1.0;
 646 #else
 647         // counter-act global font-scaling.
 648         const double fixfontsize = std::min(1.0, 0.9 / sqrtf(UIConfiguration::instance().get_ui_scale()));
 649 #endif
 650
 651         font.set_weight (Pango::WEIGHT_NORMAL);
 652         font.set_size (8.0 * fixfontsize * PANGO_SCALE);
 653         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 654         audio_font_attributes.change (*font_attr);
 655         delete font_attr;
 656
 657         font.set_weight (Pango::WEIGHT_ULTRALIGHT);
 658         font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
 659         font.set_size (7.0 * fixfontsize * PANGO_SCALE);
 660         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 661         midi_font_attributes.change (*font_attr);
 662         delete font_attr;
 663
 664         font.set_size (6.0 * fixfontsize * PANGO_SCALE);
 665         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 666         unit_font_attributes.change (*font_attr);
 667         delete font_attr;
 668
 669         cairo_move_to (cr, 0, 0);
 670         cairo_rectangle (cr, 0, 0, width, height);
 671         if (background) {
 672                 /* meterbridge */
 673                 set_bg_color(w, cr, type);
 674         } else {
 675                 /* mixer */
 676                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 677                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 678         }
 679         cairo_fill (cr);
 680
 681         cairo_set_line_width (cr, 1.0);
 682
 683         height = min(max_pattern_metric_size, height);
 684         uint32_t peakcolor = UIConfiguration::instance().color ("meterbridge peaklabel");
 685         Gdk::Color c; // default text color
 686
 687         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 688
 689                 if (types.size() > 1 && (*i) == DataType::MIDI && overlay_midi == 0) {
 690                         continue;
 691                 }
 692
 693                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 694                         /* we're overlaying more than 1 set of marks, so use different colours */
 695                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 696                 } else if (background) {
 697                         set_fg_color(w, type, &c);
 698                 } else {
 699                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 700                 }
 701
 702                 std::map<float,string> points; // map: label-pos in dBFS, label-text
 703
 704                 switch (*i) {
 705                 case DataType::AUDIO:
 706                         layout->set_attributes (audio_font_attributes);
 707                         if (type == MeterPeak0dB) {
 708                                 overlay_midi = 4;
 709                         }
 710                         switch (type) {
 711                                 case MeterK12:
 712                                         overlay_midi = 0;
 713                                         points.insert (std::pair<float,string>(-52.0f, "-40"));
 714                                         points.insert (std::pair<float,string>(-42.0f, "-30"));
 715                                         points.insert (std::pair<float,string>(-32.0f, "-20"));
 716                                         points.insert (std::pair<float,string>(-22.0f, "-10"));
 717                                         points.insert (std::pair<float,string>(-18.0f,  "-6"));
 718                                         points.insert (std::pair<float,string>(-15.0f,  "-3"));
 719                                         points.insert (std::pair<float,string>(-12.0f,  " 0"));
 720                                         points.insert (std::pair<float,string>( -9.0f,  "+3"));
 721                                         points.insert (std::pair<float,string>( -6.0f,  "+6"));
 722                                         points.insert (std::pair<float,string>( -3.0f,  "+9"));
 723                                         points.insert (std::pair<float,string>(  0.0f, "+12"));
 724                                         break;
 725                                 case MeterK14:
 726                                         overlay_midi = 0;
 727                                         points.insert (std::pair<float,string>(-54.0f, "-40"));
 728                                         points.insert (std::pair<float,string>(-44.0f, "-30"));
 729                                         points.insert (std::pair<float,string>(-34.0f, "-20"));
 730                                         points.insert (std::pair<float,string>(-24.0f, "-10"));
 731                                         points.insert (std::pair<float,string>(-20.0f,  "-6"));
 732                                         points.insert (std::pair<float,string>(-17.0f,  "-3"));
 733                                         points.insert (std::pair<float,string>(-14.0f,  " 0"));
 734                                         points.insert (std::pair<float,string>(-11.0f,  "+3"));
 735                                         points.insert (std::pair<float,string>( -8.0f,  "+6"));
 736                                         points.insert (std::pair<float,string>( -4.0f, "+10"));
 737                                         points.insert (std::pair<float,string>(  0.0f, "+14"));
 738                                         break;
 739                                 case MeterK20:
 740                                         overlay_midi = 0;
 741                                         points.insert (std::pair<float,string>(-60.0f, "-40"));
 742                                         points.insert (std::pair<float,string>(-50.0f, "-30"));
 743                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 744                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 745                                         points.insert (std::pair<float,string>(-26.0f,  "-6"));
 746                                         points.insert (std::pair<float,string>(-23.0f,  "-3"));
 747                                         points.insert (std::pair<float,string>(-20.0f,  " 0"));
 748                                         points.insert (std::pair<float,string>(-17.0f,  "+3"));
 749                                         points.insert (std::pair<float,string>(-14.0f,  "+6"));
 750                                         points.insert (std::pair<float,string>(-10.0f, "+10"));
 751                                         points.insert (std::pair<float,string>( -5.0f, "+15"));
 752                                         points.insert (std::pair<float,string>(  0.0f, "+20"));
 753                                         break;
 754                                 case MeterPeak:
 755                                         /* fallthrough */
 756                                 case MeterKrms:
 757                                         /* fallthrough */
 758                                 default:
 759                                         points.insert (std::pair<float,string>(  3.0f, "+3"));
 760                                         /* fallthrough */
 761                                 case MeterPeak0dB:
 762                                         points.insert (std::pair<float,string>(-50.0f, "-50"));
 763                                         points.insert (std::pair<float,string>(-40.0f, "-40"));
 764                                         points.insert (std::pair<float,string>(-30.0f, "-30"));
 765                                         points.insert (std::pair<float,string>(-20.0f, "-20"));
 766                                         if (types.size() == 1) {
 767                                                 if (UIConfiguration::instance().get_meter_line_up_level() == MeteringLineUp24) {
 768                                                         points.insert (std::pair<float,string>(-24.0f, "-24"));
 769                                                 } else {
 770                                                         points.insert (std::pair<float,string>(-25.0f, "-25"));
 771                                                 }
 772                                                 points.insert (std::pair<float,string>(-15.0f, "-15"));
 773                                         }
 774                                         points.insert (std::pair<float,string>(-18.0f, "-18"));
 775                                         points.insert (std::pair<float,string>(-10.0f, "-10"));
 776                                         points.insert (std::pair<float,string>( -5.0f, "-5"));
 777                                         points.insert (std::pair<float,string>( -3.0f, "-3"));
 778                                         points.insert (std::pair<float,string>(  0.0f, "+0"));
 779                                         break;
 780
 781                                 case MeterIEC2EBU:
 782                                         overlay_midi = 3;
 783                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 784                                         points.insert (std::pair<float,string>(-26.0f, "-8"));
 785                                         points.insert (std::pair<float,string>(-22.0f, "-4"));
 786                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 787                                         points.insert (std::pair<float,string>(-14.0f, "+4"));
 788                                         points.insert (std::pair<float,string>(-10.0f, "+8"));
 789                                         points.insert (std::pair<float,string>( -6.0f, "+12"));
 790                                         break;
 791
 792                                 case MeterIEC2BBC:
 793                                         overlay_midi = 3;
 794                                         points.insert (std::pair<float,string>(-30.0f, " 1 "));
 795                                         points.insert (std::pair<float,string>(-26.0f, " 2 "));
 796                                         points.insert (std::pair<float,string>(-22.0f, " 3 "));
 797                                         points.insert (std::pair<float,string>(-18.0f, " 4 "));
 798                                         points.insert (std::pair<float,string>(-14.0f, " 5 "));
 799                                         points.insert (std::pair<float,string>(-10.0f, " 6 "));
 800                                         points.insert (std::pair<float,string>( -6.0f, " 7 "));
 801                                         break;
 802
 803                                 case MeterIEC1NOR:
 804                                         overlay_midi = 0;
 805                                         //points.insert (std::pair<float,string>(-60.0f, "-42"));
 806                                         points.insert (std::pair<float,string>(-54.0f, "-36"));
 807                                         points.insert (std::pair<float,string>(-48.0f, "-30"));
 808                                         points.insert (std::pair<float,string>(-42.0f, "-24"));
 809                                         points.insert (std::pair<float,string>(-36.0f, "-18"));
 810
 811                                         //points.insert (std::pair<float,string>(-33.0f, "-15"));
 812                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 813                                         //points.insert (std::pair<float,string>(-27.0f, "-9"));
 814                                         points.insert (std::pair<float,string>(-24.0f, "-6"));
 815                                         //points.insert (std::pair<float,string>(-21.0f, "-3"));
 816
 817                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 818                                         //points.insert (std::pair<float,string>(-15.0f, "+3"));
 819                                         points.insert (std::pair<float,string>(-12.0f, "+6"));
 820                                         points.insert (std::pair<float,string>( -9.0f, "+9"));
 821                                         //points.insert (std::pair<float,string>( -6.0f, "+12"));
 822                                         break;
 823
 824                                 case MeterIEC1DIN:
 825                                         overlay_midi = 2;
 826                                         //points.insert (std::pair<float,string>( -3.0f, "200%"));
 827                                         points.insert (std::pair<float,string>( -4.0f, "+5"));
 828                                         points.insert (std::pair<float,string>( -9.0f, "0")); // "100%";
 829                                         points.insert (std::pair<float,string>(-14.0f, "-5"));
 830                                         //points.insert (std::pair<float,string>(-15.0f, "50%"));
 831                                         //points.insert (std::pair<float,string>(-18.0f, "-9"));
 832                                         points.insert (std::pair<float,string>(-19.0f, "-10")); // "30%"
 833                                         points.insert (std::pair<float,string>(-29.0f, "-20")); // "10%"
 834                                         //points.insert (std::pair<float,string>(-35.0f, "5%")); // "5%"
 835                                         points.insert (std::pair<float,string>(-39.0f, "-30"));
 836                                         //points.insert (std::pair<float,string>(-49.0f, "1%"));
 837                                         points.insert (std::pair<float,string>(-59.0f, "-50"));
 838                                         break;
 839
 840                                 case MeterVU:
 841                                         overlay_midi = 0;
 842                                         points.insert (std::pair<float,string>(-17.0f, "+3"));
 843                                         points.insert (std::pair<float,string>(-18.0f, "+2"));
 844                                         points.insert (std::pair<float,string>(-19.0f, "+1"));
 845                                         points.insert (std::pair<float,string>(-20.0f, " 0"));
 846                                         points.insert (std::pair<float,string>(-21.0f, "-1"));
 847                                         points.insert (std::pair<float,string>(-22.0f, "-2"));
 848                                         points.insert (std::pair<float,string>(-23.0f, "-3"));
 849                                         points.insert (std::pair<float,string>(-25.0f, "-5"));
 850                                         points.insert (std::pair<float,string>(-27.0f, "-7"));
 851                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 852                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 853                                         break;
 854                         }
 855                         break;
 856                 case DataType::MIDI:
 857                         layout->set_attributes (midi_font_attributes);
 858                         if (types.size() == 1) {
 859                                 points.insert (std::pair<float,string>(  0, "0"));
 860                                 points.insert (std::pair<float,string>( 16,  "16"));
 861                                 points.insert (std::pair<float,string>( 32,  "32"));
 862                                 points.insert (std::pair<float,string>( 48,  "48"));
 863                                 points.insert (std::pair<float,string>( 64,  "64"));
 864                                 points.insert (std::pair<float,string>( 80,  "80"));
 865                                 points.insert (std::pair<float,string>( 96,  "96"));
 866                                 points.insert (std::pair<float,string>(100, "100"));
 867                                 points.insert (std::pair<float,string>(112, "112"));
 868                                 points.insert (std::pair<float,string>(127, "127"));
 869                         } else {
 870                                 switch (overlay_midi) {
 871                                         case 1:
 872                                                 /* labels that don't overlay with dBFS */
 873                                                 points.insert (std::pair<float,string>(  0, "0"));
 874                                                 points.insert (std::pair<float,string>( 24, "24"));
 875                                                 points.insert (std::pair<float,string>( 48, "48"));
 876                                                 points.insert (std::pair<float,string>( 72, "72"));
 877                                                 points.insert (std::pair<float,string>(127, "127"));
 878                                                 break;
 879                                         case 2:
 880                                                 /* labels that don't overlay with DIN */
 881                                                 points.insert (std::pair<float,string>(  0, "0"));
 882                                                 points.insert (std::pair<float,string>( 16,  "16"));
 883                                                 points.insert (std::pair<float,string>( 40,  "40"));
 884                                                 points.insert (std::pair<float,string>( 64,  "64"));
 885                                                 points.insert (std::pair<float,string>(112, "112"));
 886                                                 points.insert (std::pair<float,string>(127, "127"));
 887                                                 break;
 888                                         case 3:
 889                                                 /* labels that don't overlay with BBC nor EBU*/
 890                                                 points.insert (std::pair<float,string>(  0, "0"));
 891                                                 points.insert (std::pair<float,string>( 16, "16"));
 892                                                 points.insert (std::pair<float,string>( 56, "56"));
 893                                                 points.insert (std::pair<float,string>( 72, "72"));
 894                                                 points.insert (std::pair<float,string>(112, "112"));
 895                                                 points.insert (std::pair<float,string>(127, "127"));
 896                                                 break;
 897                                         case 4:
 898                                                 /* labels that don't overlay with 0dBFS*/
 899                                                 points.insert (std::pair<float,string>(  0, "0"));
 900                                                 points.insert (std::pair<float,string>( 16, "16"));
 901                                                 points.insert (std::pair<float,string>( 48, "48"));
 902                                                 points.insert (std::pair<float,string>( 84, "84"));
 903                                                 points.insert (std::pair<float,string>(100, "100"));
 904                                         default:
 905                                                 break;
 906                                 }
 907                         }
 908                         break;
 909                 }
 910
 911                 gint pos = -1;
 912
 913                 for (std::map<float,string>::const_iterator j = points.begin(); j != points.end(); ++j) {
 914                         float fraction = 0;
 915                         bool align_center = background; // this is true for meterbridge meters w/ fixed background
 916                         switch (*i) {
 917                                 case DataType::AUDIO:
 918                                         fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 919
 920                                         pos = height - (gint) floor (height * fraction);
 921                                         pos = max (pos, 1);
 922                                         if (tickleft) {
 923                                                 cairo_move_to(cr, width-1.5, pos + .5);
 924                                                 cairo_line_to(cr, width, pos + .5);
 925                                                 cairo_stroke (cr);
 926                                         } else if (tickright) {
 927                                                 cairo_move_to(cr, 0, pos + .5);
 928                                                 cairo_line_to(cr, 1.5, pos + .5);
 929                                                 cairo_stroke (cr);
 930                                         }
 931                                         break;
 932                                 case DataType::MIDI:
 933                                         align_center = false; // don't bleed into legend
 934                                         fraction = (j->first) / 127.0;
 935                                         pos = 1 + height - (gint) lrintf (height * fraction);
 936                                         pos = min (pos, height);
 937                                         break;
 938                         }
 939
 940                         if (pos < 0) continue;
 941
 942                         layout->set_text(j->second.c_str());
 943
 944                         int tw, th;
 945                         layout->get_pixel_size(tw, th);
 946
 947                         int p = pos - (th / 2) - 1;
 948                         p = min (p, height - th);
 949                         p = max (p, 0);
 950
 951                         if (align_center) {
 952                                 cairo_move_to (cr, (width-tw)/2.0, p);
 953                         } else {
 954                                 cairo_move_to (cr, width-3-tw, p);
 955                         }
 956
 957                         cairo_set_line_width(cr, 0.12);
 958                         cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
 959                         pango_cairo_layout_path(cr, layout->gobj());
 960                         cairo_stroke_preserve (cr);
 961                         cairo_set_line_width(cr, 1.0);
 962
 963                         if ((*i) == DataType::AUDIO) {
 964                                 mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 965                         } else {
 966                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 967                         }
 968
 969                         pango_cairo_show_layout (cr, layout->gobj());
 970                         cairo_new_path(cr);
 971                 }
 972         }
 973
 974         // add legend
 975         if (types.size() == 1 || overlay_midi == 0) {
 976                 int tw, th;
 977                 layout->set_attributes (unit_font_attributes);
 978                 switch (types.at(0)) {
 979                         case DataType::AUDIO:
 980                                 switch (type) {
 981                                         case MeterK20:
 982                                                 layout->set_text("K20");
 983                                                 break;
 984                                         case MeterK14:
 985                                                 layout->set_text("K14");
 986                                                 break;
 987                                         case MeterK12:
 988                                                 layout->set_text("K12");
 989                                                 break;
 990                                         default:
 991                                         case MeterPeak:
 992                                         case MeterPeak0dB:
 993                                         case MeterKrms:
 994                                                 layout->set_text("dBFS");
 995                                                 break;
 996                                         case MeterIEC2EBU:
 997                                                 layout->set_text("EBU");
 998                                                 break;
 999                                         case MeterIEC2BBC:
1000                                                 layout->set_text("BBC");
1001                                                 break;
1002                                         case MeterIEC1DIN:
1003                                                 layout->set_text("DIN");
1004                                                 break;
1005                                         case MeterIEC1NOR:
1006                                                 layout->set_text("NOR");
1007                                                 break;
1008                                         case MeterVU:
1009                                                 layout->set_text("VU");
1010                                                 break;
1011                                 }
1012                                 layout->get_pixel_size(tw, th);
1013                                 break;
1014                         case DataType::MIDI:
1015                                 layout->set_text("mid");
1016                                 layout->get_pixel_size(tw, th);
1017                                 break;
1018                         default: // DataType::NIL;
1019                                 layout->set_text("");
1020                                 tw = th = 0;
1021                                 assert (0); // not reached
1022                                 break;
1023                 }
1024                 if (!background) {
1025                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
1026                 }
1027                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
1028                 if (tickleft) {
1029                         cairo_move_to (cr, width - 2 - tw, height - th - 0.5);
1030                 } else {
1031                         cairo_move_to (cr, 2, height - th - 0.5);
1032                 }
1033                 pango_cairo_show_layout (cr, layout->gobj());
1034         }
1035
1036         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
1037
1038         cairo_destroy (cr);
1039         cairo_surface_destroy (surface);
1040
1041         return pattern;
1042 }
1043
1044 gint
1045 ArdourMeter::meter_expose_ticks (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mta)
1046 {
1047         Glib::RefPtr<Gdk::Window> win (mta->get_window());
1048         cairo_t* cr;
1049
1050         cr = gdk_cairo_create (win->gobj());
1051
1052         /* clip to expose area */
1053
1054         gdk_cairo_rectangle (cr, &ev->area);
1055         cairo_clip (cr);
1056
1057         cairo_pattern_t* pattern;
1058         const MeterMatricsMapKey key (mta->get_name(), type, types_to_bit(types));
1059         MetricPatternMap::iterator i = ticks_patterns.find (key);
1060
1061         if (i == ticks_patterns.end()) {
1062                 pattern = meter_render_ticks (*mta, type, types);
1063                 ticks_patterns[key] = pattern;
1064         } else {
1065                 pattern = i->second;
1066         }
1067
1068         cairo_move_to (cr, 0, 0);
1069         cairo_set_source (cr, pattern);
1070
1071         gint width, height;
1072         win->get_size (width, height);
1073
1074         cairo_rectangle (cr, 0, 0, width, height);
1075         cairo_fill (cr);
1076
1077         cairo_destroy (cr);
1078
1079         return true;
1080 }
1081
1082 gint
1083 ArdourMeter::meter_expose_metrics (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mma)
1084 {
1085         Glib::RefPtr<Gdk::Window> win (mma->get_window());
1086         cairo_t* cr;
1087
1088         cr = gdk_cairo_create (win->gobj());
1089
1090         /* clip to expose area */
1091
1092         gdk_cairo_rectangle (cr, &ev->area);
1093         cairo_clip (cr);
1094
1095         cairo_pattern_t* pattern;
1096         const MeterMatricsMapKey key (mma->get_name(), type, types_to_bit(types));
1097         MetricPatternMap::iterator i = metric_patterns.find (key);
1098
1099         if (i == metric_patterns.end()) {
1100                 pattern = meter_render_metrics (*mma, type, types);
1101                 metric_patterns[key] = pattern;
1102         } else {
1103                 pattern = i->second;
1104         }
1105
1106         cairo_move_to (cr, 0, 0);
1107
1108         gint width, height;
1109         win->get_size (width, height);
1110 #ifdef NO_OVERSAMPLE
1111         cairo_set_source (cr, pattern);
1112         cairo_rectangle (cr, 0, 0, width, height);
1113 #else
1114         cairo_scale(cr, 0.5, 0.5);
1115         cairo_set_antialias(cr, CAIRO_ANTIALIAS_BEST);
1116         cairo_set_source (cr, pattern);
1117         cairo_rectangle (cr, 0, 0, width * 2., height * 2.);
1118 #endif
1119
1120         cairo_fill (cr);
1121
1122         cairo_destroy (cr);
1123
1124         return true;
1125 }
1126
1127 void
1128 ArdourMeter::meter_clear_pattern_cache(int which) {
1129         MetricPatternMap::iterator i = metric_patterns.begin();
1130         MetricPatternMap::iterator j = ticks_patterns.begin();
1131
1132         while (i != metric_patterns.end()) {
1133                 int m = 4;
1134                 MeterMatricsMapKey const * const key = &(i->first);
1135                 std::string n = key->_n;
1136                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1137                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1138                 if (which & m) {
1139                         cairo_pattern_destroy(i->second);
1140                         metric_patterns.erase(i++);
1141                 } else {
1142                         ++i;
1143                 }
1144         }
1145
1146         while (j != ticks_patterns.end()) {
1147                 int m = 4;
1148                 MeterMatricsMapKey const * const key = &(j->first);
1149                 std::string n = key->_n;
1150                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1151                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1152                 if (which & m) {
1153                         cairo_pattern_destroy(j->second);
1154                         ticks_patterns.erase(j++);
1155                 } else {
1156                         ++j;
1157                 }
1158         }
1159         RedrawMetrics(); /* EMIT SIGNAL */
1160 }