gtk2_ardour/meter_patterns.cc

   1 /*
   2     Copyright (C) 2013 Paul Davis
   3     Author: Robin Gareus
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include <gtkmm2ext/cairo_widget.h>
  21 #include <gtkmm2ext/gtk_ui.h>
  22 #include <gtkmm2ext/utils.h>
  23 #include <gtkmm2ext/rgb_macros.h>
  24
  25 #include <ardour/rc_configuration.h>
  26 #include "ardour_ui.h"
  27 #include "utils.h"
  28 #include "logmeter.h"
  29 #include "meter_patterns.h"
  30
  31 #include "i18n.h"
  32
  33 using namespace ARDOUR;
  34 using namespace ARDOUR_UI_UTILS;
  35 using namespace PBD;
  36 using namespace Gtk;
  37 using namespace Gtkmm2ext;
  38 using namespace std;
  39 using namespace ArdourMeter;
  40
  41 static const int max_pattern_metric_size = 1026;
  42
  43 /* signals used by meters */
  44
  45 sigc::signal<void> ArdourMeter::ResetAllPeakDisplays;
  46 sigc::signal<void,ARDOUR::Route*> ArdourMeter::ResetRoutePeakDisplays;
  47 sigc::signal<void,ARDOUR::RouteGroup*> ArdourMeter::ResetGroupPeakDisplays;
  48 sigc::signal<void> ArdourMeter::RedrawMetrics;
  49
  50 sigc::signal<void, int, ARDOUR::RouteGroup*, ARDOUR::MeterType> ArdourMeter::SetMeterTypeMulti;
  51
  52
  53 /* pattern cache */
  54
  55 struct MeterMatricsMapKey {
  56         MeterMatricsMapKey (std::string n, MeterType t, int dt)
  57                 : _n(n)
  58                 , _t(t)
  59                 , _dt(dt)
  60         {}
  61         inline bool operator<(const MeterMatricsMapKey& rhs) const {
  62                 return (_n < rhs._n) || (_n == rhs._n && _t < rhs._t) || (_n == rhs._n && _t == rhs._t && _dt < rhs._dt);
  63         }
  64         std::string _n;
  65         MeterType _t;
  66         int _dt;
  67 };
  68
  69 namespace ArdourMeter {
  70         typedef std::map<MeterMatricsMapKey, cairo_pattern_t*> MetricPatternMap;
  71 }
  72
  73 static ArdourMeter::MetricPatternMap ticks_patterns;
  74 static ArdourMeter::MetricPatternMap metric_patterns;
  75
  76
  77 const std::string
  78 ArdourMeter::meter_type_string (ARDOUR::MeterType mt)
  79 {
  80         switch (mt) {
  81                 case MeterPeak:
  82                         return _("Peak");
  83                         break;
  84                 case MeterKrms:
  85                         return _("RMS + Peak");
  86                         break;
  87                 case MeterIEC1DIN:
  88                         return _("IEC1/DIN");
  89                         break;
  90                 case MeterIEC1NOR:
  91                         return _("IEC1/Nordic");
  92                         break;
  93                 case MeterIEC2BBC:
  94                         return _("IEC2/BBC");
  95                         break;
  96                 case MeterIEC2EBU:
  97                         return _("IEC2/EBU");
  98                         break;
  99                 case MeterK20:
 100                         return _("K20");
 101                         break;
 102                 case MeterK14:
 103                         return _("K14");
 104                         break;
 105                 case MeterK12:
 106                         return _("K12");
 107                         break;
 108                 case MeterVU:
 109                         return _("VU");
 110                         break;
 111                 default:
 112                         return _("???");
 113                         break;
 114         }
 115 }
 116
 117 static inline int types_to_bit (vector<ARDOUR::DataType> types) {
 118         int rv = 0;
 119         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 120                 rv |= 1 << (*i);
 121         }
 122         return rv;
 123 }
 124
 125 static inline float mtr_col_and_fract(
 126                 cairo_t* cr, Gdk::Color const * const c, const uint32_t peakcolor, const MeterType mt, const float val)
 127 {
 128         float fraction = 0;
 129
 130         switch (mt) {
 131                 default:
 132                 case MeterKrms:
 133                 case MeterPeak:
 134                         fraction = log_meter (val);
 135                         if (val >= 0 || val == -9) {
 136                                 cairo_set_source_rgb (cr,
 137                                                 UINT_RGBA_R_FLT(peakcolor),
 138                                                 UINT_RGBA_G_FLT(peakcolor),
 139                                                 UINT_RGBA_B_FLT(peakcolor));
 140                         } else {
 141                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 142                         }
 143                         break;
 144                 case MeterIEC2BBC:
 145                 case MeterIEC2EBU:
 146                         fraction = meter_deflect_ppm(val);
 147                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 148                         break;
 149                 case MeterIEC1NOR:
 150                         fraction = meter_deflect_nordic(val);
 151 #if 0
 152                         if (val == -18.0) {
 153                                 cairo_set_source_rgb (cr,
 154                                                 UINT_RGBA_R_FLT(peakcolor),
 155                                                 UINT_RGBA_G_FLT(peakcolor),
 156                                                 UINT_RGBA_B_FLT(peakcolor));
 157                         } else {
 158                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 159                         }
 160 #else
 161                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 162 #endif
 163                         break;
 164                 case MeterIEC1DIN:
 165                         fraction = meter_deflect_din(val);
 166                         if (val == -9.0 || val == -15 || val == -18) {
 167                                 cairo_set_source_rgb (cr,
 168                                                 UINT_RGBA_R_FLT(peakcolor),
 169                                                 UINT_RGBA_G_FLT(peakcolor),
 170                                                 UINT_RGBA_B_FLT(peakcolor));
 171                         } else {
 172                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 173                         }
 174                         break;
 175                 case MeterVU:
 176                         fraction = meter_deflect_vu(val);
 177                         if (val >= -20.0) {
 178                                 cairo_set_source_rgb (cr,
 179                                                 UINT_RGBA_R_FLT(peakcolor),
 180                                                 UINT_RGBA_G_FLT(peakcolor),
 181                                                 UINT_RGBA_B_FLT(peakcolor));
 182                         } else {
 183                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 184                         }
 185                         break;
 186                 case MeterK20:
 187                         fraction = meter_deflect_k (val, 20);
 188                         if (val >= -16.0) {
 189                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 190                         } else if (val >= -20.0) {
 191                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 192                         } else {
 193                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 194                         }
 195                         break;
 196                 case MeterK14:
 197                         if (val >= -10.0) {
 198                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 199                         } else if (val >= -14.0) {
 200                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 201                         } else {
 202                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 203                         }
 204                         fraction = meter_deflect_k (val, 14);
 205                         break;
 206                 case MeterK12:
 207                         if (val >= -8.0) {
 208                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 209                         } else if (val >= -12.0) {
 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                         fraction = meter_deflect_k (val, 12);
 215                         break;
 216         }
 217         return fraction;
 218 }
 219
 220 static void mtr_red_stripe(cairo_t* cr, float l, float w, int h, float top, float bot) {
 221         if (w <= 0) return;
 222         int t = h - floorf (h * (top));
 223         int b = h - floorf (h * (bot));
 224         cairo_set_source_rgba (cr, .75, 0, 0, 0.75);
 225         cairo_rectangle (cr, l, t + .5, w, b - t);
 226         cairo_fill (cr);
 227 }
 228
 229 static void set_bg_color (Gtk::Widget& w, cairo_t* cr, MeterType type) {
 230         double r,g,b,a;
 231         switch(type) {
 232                 case MeterVU:
 233                         ArdourCanvas::color_to_rgba (ARDOUR_UI::config()->color ("meterstrip vu bg"), r, g, b, a);
 234                         break;
 235                 case MeterIEC1DIN:
 236                 case MeterIEC1NOR:
 237                 case MeterIEC2BBC:
 238                 case MeterIEC2EBU:
 239                         ArdourCanvas::color_to_rgba (ARDOUR_UI::config()->color ("meterstrip ppm bg"), r, g, b, a);
 240                         break;
 241                 case MeterK12:
 242                 case MeterK14:
 243                 case MeterK20:
 244                         ArdourCanvas::color_to_rgba (ARDOUR_UI::config()->color ("meterstrip dpm bg"), r, g, b, a);
 245                         break;
 246                 default:
 247                         {
 248                         Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_ACTIVE);
 249                         r = c.get_red_p();
 250                         g = c.get_green_p();
 251                         b = c.get_blue_p();
 252                         }
 253                         break;
 254         }
 255         cairo_set_source_rgb (cr, r, g, b);
 256 }
 257
 258 static void set_fg_color(Gtk::Widget&, MeterType type, Gdk::Color * c) {
 259         double r,g,b,a;
 260         switch(type) {
 261                 case MeterVU:
 262                         ArdourCanvas::color_to_rgba (ARDOUR_UI::config()->color ("meterstrip vu fg"), r, g, b, a);
 263                         break;
 264                 case MeterIEC1DIN:
 265                 case MeterIEC1NOR:
 266                 case MeterIEC2BBC:
 267                 case MeterIEC2EBU:
 268                         ArdourCanvas::color_to_rgba (ARDOUR_UI::config()->color ("meterstrip ppm fg"), r, g, b, a);
 269                         break;
 270                 default:
 271                         ArdourCanvas::color_to_rgba (ARDOUR_UI::config()->color ("meterstrip dpm fg"), r, g, b, a);
 272                         break;
 273         }
 274         c->set_rgb_p (r, g, b);
 275 }
 276
 277 static cairo_pattern_t*
 278 meter_render_ticks (Gtk::Widget& w, MeterType type, vector<ARDOUR::DataType> types)
 279 {
 280         Glib::RefPtr<Gdk::Window> win (w.get_window());
 281
 282         bool background;
 283         bool tickleft, tickright;
 284         gint width, height;
 285         win->get_size (width, height);
 286         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 287         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 288         background = types.size() == 0 || tickleft || tickright;
 289
 290         float box_l=0;
 291         float box_w=0;
 292         if (tickleft) {
 293                 if (w.get_name().substr(0, 3) == "Bar") {
 294                         box_l = width-2; box_w = 2;
 295                 } else if (w.get_name().substr(0, 4) == "Mark") {
 296                         box_l = width-2; box_w = 2;
 297                         background = false;
 298                 }
 299         } else if (tickright) {
 300                 if (w.get_name().substr(0, 3) == "Bar") {
 301                         box_l = 0; box_w = 2;
 302                 } else if (w.get_name().substr(0, 4) == "Mark") {
 303                         box_l = 0; box_w = 2;
 304                         background = false;
 305                 }
 306         } else {
 307                 box_l = 0; box_w = 3;
 308         }
 309
 310         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 311         cairo_t* cr = cairo_create (surface);
 312
 313         cairo_move_to (cr, 0, 0);
 314         cairo_rectangle (cr, 0, 0, width, height);
 315
 316         if (background) {
 317                 /* meterbridge */
 318                 set_bg_color(w, cr, type);
 319         } else {
 320                 /* mixer */
 321                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 322                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 323         }
 324         cairo_fill (cr);
 325
 326         height = min(max_pattern_metric_size, height);
 327         uint32_t peakcolor = ARDOUR_UI::config()->color ("meterbridge peaklabel");
 328
 329         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 330
 331                 Gdk::Color c;
 332                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 333                         /* we're overlaying more than 1 set of marks, so use different colours */
 334                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 335                 } else if (background) {
 336                         set_fg_color(w, type, &c);
 337                 } else {
 338                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 339                 }
 340
 341                 // tick-maker position in dBFS, line-thickness
 342                 std::map<float,float> points;
 343
 344                 switch (*i) {
 345                 case DataType::AUDIO:
 346
 347                         switch (type) {
 348                                 case MeterK12:
 349                                         points.insert (std::pair<float,float>(-52.0f, 1.0));
 350                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 351                                         points.insert (std::pair<float,float>(-32.0f, 1.0));
 352                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 353                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 354                                         points.insert (std::pair<float,float>(-15.0f, 1.0));
 355                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 356                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 357                                         points.insert (std::pair<float,float>( -8.0f, 0.8));
 358                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 359                                         points.insert (std::pair<float,float>( -3.0f, 1.0));
 360                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 361                                         break;
 362                                 case MeterK14:
 363                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 364                                         points.insert (std::pair<float,float>(-44.0f, 1.0));
 365                                         points.insert (std::pair<float,float>(-34.0f, 1.0));
 366                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 367                                         points.insert (std::pair<float,float>(-20.0f, 1.0));
 368                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 369                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); //   0
 370                                         points.insert (std::pair<float,float>(-11.0f, 1.0)); //  +3
 371                                         points.insert (std::pair<float,float>(-10.0f, 0.8)); //  +4
 372                                         points.insert (std::pair<float,float>( -8.0f, 1.0)); //  +6
 373                                         points.insert (std::pair<float,float>( -4.0f, 1.0)); // +10
 374                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 375                                         break;
 376                                 case MeterK20:
 377                                         points.insert (std::pair<float,float>(-60.0f, 1.0));
 378                                         points.insert (std::pair<float,float>(-50.0f, 1.0));
 379                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 380                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 381                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 382                                         points.insert (std::pair<float,float>(-23.0f, 1.0));
 383                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); //  0
 384                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 385                                         points.insert (std::pair<float,float>(-16.0f, 0.8));
 386                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); // +6
 387                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 388                                         points.insert (std::pair<float,float>( -5.0f, 1.0));
 389                                         points.insert (std::pair<float,float>(  0.0f, 1.0)); //+20
 390                                         break;
 391                                 case MeterIEC2EBU:
 392                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 393                                         points.insert (std::pair<float,float>(-28.0f, 0.5));
 394                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 395                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 396                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 397                                         points.insert (std::pair<float,float>(-20.0f, 0.5));
 398                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 399                                         points.insert (std::pair<float,float>(-16.0f, 0.5));
 400                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 401                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 402                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 403                                         points.insert (std::pair<float,float>( -9.0f, 0.8));
 404                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 405                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 406                                         break;
 407                                 case MeterIEC2BBC:
 408                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 409                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 410                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 411                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 412                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 413                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 414                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 415                                         break;
 416                                 case MeterIEC1NOR:
 417                                         points.insert (std::pair<float,float>(-60.0f, 1.0)); // -42
 418                                         points.insert (std::pair<float,float>(-57.0f, 0.5));
 419                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 420                                         points.insert (std::pair<float,float>(-51.0f, 0.5));
 421                                         points.insert (std::pair<float,float>(-48.0f, 1.0));
 422                                         points.insert (std::pair<float,float>(-45.0f, 0.5));
 423                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 424                                         points.insert (std::pair<float,float>(-39.0f, 0.5));
 425                                         points.insert (std::pair<float,float>(-36.0f, 1.0));
 426
 427                                         points.insert (std::pair<float,float>(-33.0f, 0.5));
 428                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 429                                         points.insert (std::pair<float,float>(-27.0f, 0.5));
 430                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 431                                         points.insert (std::pair<float,float>(-21.0f, 0.5));
 432
 433                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 434                                         points.insert (std::pair<float,float>(-15.0f, 0.5));
 435                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 436                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 437                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 438                                         mtr_red_stripe(cr, box_l, box_w, height,
 439                                                         meter_deflect_nordic(-6.0f), meter_deflect_nordic(-12.0f));
 440                                         break;
 441                                 case MeterIEC1DIN:
 442                                         points.insert (std::pair<float,float>( -3.0f, 0.5)); // "200%"
 443                                         points.insert (std::pair<float,float>( -4.0f, 1.0));
 444                                         points.insert (std::pair<float,float>( -5.0f, 0.5));
 445                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 446                                         points.insert (std::pair<float,float>( -7.0f, 0.5));
 447                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 448                                         points.insert (std::pair<float,float>( -9.0f, 1.0)); // "100%"
 449                                         points.insert (std::pair<float,float>(-10.0f, 0.5));
 450                                         points.insert (std::pair<float,float>(-11.0f, 0.5));
 451                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 452                                         points.insert (std::pair<float,float>(-13.0f, 0.5));
 453                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 454                                         points.insert (std::pair<float,float>(-15.0f, 0.8)); // "50%"
 455                                         points.insert (std::pair<float,float>(-18.0f, 0.8)); // "-9"
 456                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 457                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 458                                         points.insert (std::pair<float,float>(-29.0f, 1.0)); // "-20", "10%"
 459                                         points.insert (std::pair<float,float>(-34.0f, 0.5)); // -25
 460                                         //points.insert (std::pair<float,float>(-35.0f, 0.5)); // "5%" " -20"
 461                                         points.insert (std::pair<float,float>(-39.0f, 1.0));
 462                                         points.insert (std::pair<float,float>(-49.0f, 1.0));
 463                                         points.insert (std::pair<float,float>(-54.0f, 0.5));
 464                                         points.insert (std::pair<float,float>(-59.0f, 1.0));
 465                                         mtr_red_stripe(cr, box_l, box_w, height,
 466                                                         meter_deflect_din(0.0f), meter_deflect_din(-9.0f));
 467                                         break;
 468                                 case MeterVU:
 469                                         points.insert (std::pair<float,float>(-17.0f, 1.0)); //+3 VU
 470                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 471                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 472                                         points.insert (std::pair<float,float>(-19.5f, 0.5));
 473                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); // 0 VU
 474                                         points.insert (std::pair<float,float>(-20.5f, 0.5));
 475                                         points.insert (std::pair<float,float>(-21.0f, 1.0));
 476                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 477                                         points.insert (std::pair<float,float>(-23.0f, 1.0)); //-3 VU
 478                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 479                                         points.insert (std::pair<float,float>(-25.0f, 1.0));
 480                                         points.insert (std::pair<float,float>(-26.0f, 0.5));
 481                                         points.insert (std::pair<float,float>(-27.0f, 1.0)); //-7 VU
 482                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 483                                         points.insert (std::pair<float,float>(-35.0f, 0.5));
 484                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 485                                         mtr_red_stripe(cr, box_l, box_w, height,
 486                                                         meter_deflect_vu(-17.0f), meter_deflect_vu(-20.0f));
 487                                         break;
 488
 489                                 default:
 490                                         points.insert (std::pair<float,float>(-60, 0.5));
 491                                         points.insert (std::pair<float,float>(-50, 1.0));
 492                                         points.insert (std::pair<float,float>(-40, 1.0));
 493                                         points.insert (std::pair<float,float>(-30, 1.0));
 494                                         if (ARDOUR_UI::config()->get_meter_line_up_level() == MeteringLineUp24) {
 495                                                 points.insert (std::pair<float,float>(-24, 1.0));
 496                                         } else {
 497                                                 points.insert (std::pair<float,float>(-25, 1.0));
 498                                         }
 499                                         points.insert (std::pair<float,float>(-20, 1.0));
 500
 501                                         points.insert (std::pair<float,float>(-19, 0.5));
 502                                         points.insert (std::pair<float,float>(-18, 1.0));
 503                                         points.insert (std::pair<float,float>(-17, 0.5));
 504                                         points.insert (std::pair<float,float>(-16, 0.5));
 505                                         points.insert (std::pair<float,float>(-15, 1.0));
 506
 507                                         points.insert (std::pair<float,float>(-14, 0.5));
 508                                         points.insert (std::pair<float,float>(-13, 0.5));
 509                                         points.insert (std::pair<float,float>(-12, 0.5));
 510                                         points.insert (std::pair<float,float>(-11, 0.5));
 511                                         points.insert (std::pair<float,float>(-10, 1.0));
 512
 513                                         points.insert (std::pair<float,float>( -9, 1.0));
 514                                         points.insert (std::pair<float,float>( -8, 0.5));
 515                                         points.insert (std::pair<float,float>( -7, 0.5));
 516                                         points.insert (std::pair<float,float>( -6, 0.5));
 517                                         points.insert (std::pair<float,float>( -5, 1.0));
 518                                         points.insert (std::pair<float,float>( -4, 0.5));
 519                                         points.insert (std::pair<float,float>( -3, 1.0));
 520                                         points.insert (std::pair<float,float>( -2, 0.5));
 521                                         points.insert (std::pair<float,float>( -1, 0.5));
 522
 523                                         points.insert (std::pair<float,float>(  0, 1.0));
 524                                         points.insert (std::pair<float,float>(  1, 0.5));
 525                                         points.insert (std::pair<float,float>(  2, 0.5));
 526                                         points.insert (std::pair<float,float>(  3, 1.0));
 527                                         points.insert (std::pair<float,float>(  4, 0.5));
 528                                         points.insert (std::pair<float,float>(  5, 0.5));
 529                                         break;
 530                         }
 531                         break;
 532
 533                 case DataType::MIDI:
 534                         points.insert (std::pair<float,float>(  0, 1.0));
 535                         points.insert (std::pair<float,float>( 16, 0.5));
 536                         points.insert (std::pair<float,float>( 32, 0.5));
 537                         points.insert (std::pair<float,float>( 48, 0.5));
 538                         points.insert (std::pair<float,float>( 64, 1.0));
 539                         points.insert (std::pair<float,float>( 80, 0.5));
 540                         points.insert (std::pair<float,float>( 96, 0.5));
 541                         points.insert (std::pair<float,float>(100, 1.0));
 542                         points.insert (std::pair<float,float>(112, 0.5));
 543                         points.insert (std::pair<float,float>(127, 1.0));
 544                         break;
 545                 }
 546
 547                 for (std::map<float,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
 548                         cairo_set_line_width (cr, (j->second));
 549
 550                         float fraction = 0;
 551                         gint pos;
 552
 553                         switch (*i) {
 554                         case DataType::AUDIO:
 555                                 fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 556
 557                                 pos = height - (gint) floor (height * fraction);
 558                                 pos = max (pos, 1);
 559                                 cairo_move_to(cr, 0, pos + .5);
 560                                 cairo_line_to(cr, 3, pos + .5);
 561                                 cairo_stroke (cr);
 562                                 break;
 563                         case DataType::MIDI:
 564                                 fraction = (j->first) / 127.0;
 565                                 pos = 1 + height - (gint) floor (height * fraction);
 566                                 pos = min (pos, height);
 567                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 568                                 cairo_arc(cr, 1.5, pos + .5, 1.0, 0, 2 * M_PI);
 569                                 cairo_fill(cr);
 570                                 break;
 571                         }
 572                 }
 573         }
 574
 575         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 576
 577         cairo_destroy (cr);
 578         cairo_surface_destroy (surface);
 579
 580         return pattern;
 581 }
 582
 583 static cairo_pattern_t*
 584 meter_render_metrics (Gtk::Widget& w, MeterType type, vector<DataType> types)
 585 {
 586         Glib::RefPtr<Gdk::Window> win (w.get_window());
 587
 588         bool tickleft, tickright;
 589         bool background;
 590         int overlay_midi = 1;
 591         gint width, height;
 592         win->get_size (width, height);
 593
 594         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 595         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 596         background = types.size() == 0 || tickleft || tickright;
 597
 598         if (!tickleft && !tickright) {
 599                 tickright = true;
 600         }
 601
 602         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 603         cairo_t* cr = cairo_create (surface);
 604         Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
 605
 606         Pango::AttrList audio_font_attributes;
 607         Pango::AttrList midi_font_attributes;
 608         Pango::AttrList unit_font_attributes;
 609
 610         Pango::AttrFontDesc* font_attr;
 611         Pango::FontDescription font;
 612
 613         font = Pango::FontDescription (ARDOUR_UI::config()->get_SmallMonospaceFont());
 614         double fixfontsize = 81920.0 / (double) ARDOUR_UI::config()->get_font_scale();
 615
 616         font.set_weight (Pango::WEIGHT_NORMAL);
 617         font.set_size (9.0 * PANGO_SCALE * fixfontsize);
 618         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 619         audio_font_attributes.change (*font_attr);
 620         delete font_attr;
 621
 622         font.set_weight (Pango::WEIGHT_ULTRALIGHT);
 623         font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
 624         font.set_size (8.0 * PANGO_SCALE * fixfontsize);
 625         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 626         midi_font_attributes.change (*font_attr);
 627         delete font_attr;
 628
 629         font.set_size (6.0 * PANGO_SCALE * fixfontsize);
 630         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 631         unit_font_attributes.change (*font_attr);
 632         delete font_attr;
 633
 634         cairo_move_to (cr, 0, 0);
 635         cairo_rectangle (cr, 0, 0, width, height);
 636         if (background) {
 637                 /* meterbridge */
 638                 set_bg_color(w, cr, type);
 639         } else {
 640                 /* mixer */
 641                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 642                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 643         }
 644         cairo_fill (cr);
 645
 646         cairo_set_line_width (cr, 1.0);
 647
 648         height = min(max_pattern_metric_size, height);
 649         uint32_t peakcolor = ARDOUR_UI::config()->color ("meterbridge peaklabel");
 650         Gdk::Color c; // default text color
 651
 652         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 653
 654                 if (types.size() > 1 && (*i) == DataType::MIDI && overlay_midi == 0) {
 655                         continue;
 656                 }
 657
 658                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 659                         /* we're overlaying more than 1 set of marks, so use different colours */
 660                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 661                 } else if (background) {
 662                         set_fg_color(w, type, &c);
 663                 } else {
 664                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 665                 }
 666
 667                 std::map<float,string> points; // map: label-pos in dBFS, label-text
 668
 669                 switch (*i) {
 670                 case DataType::AUDIO:
 671                         layout->set_attributes (audio_font_attributes);
 672                         switch (type) {
 673                                 case MeterK12:
 674                                         overlay_midi = 0;
 675                                         points.insert (std::pair<float,string>(-52.0f, "-40"));
 676                                         points.insert (std::pair<float,string>(-42.0f, "-30"));
 677                                         points.insert (std::pair<float,string>(-32.0f, "-20"));
 678                                         points.insert (std::pair<float,string>(-22.0f, "-10"));
 679                                         points.insert (std::pair<float,string>(-18.0f,  "-6"));
 680                                         points.insert (std::pair<float,string>(-15.0f,  "-3"));
 681                                         points.insert (std::pair<float,string>(-12.0f,  " 0"));
 682                                         points.insert (std::pair<float,string>( -9.0f,  "+3"));
 683                                         points.insert (std::pair<float,string>( -6.0f,  "+6"));
 684                                         points.insert (std::pair<float,string>( -3.0f,  "+9"));
 685                                         points.insert (std::pair<float,string>(  0.0f, "+12"));
 686                                         break;
 687                                 case MeterK14:
 688                                         overlay_midi = 0;
 689                                         points.insert (std::pair<float,string>(-54.0f, "-40"));
 690                                         points.insert (std::pair<float,string>(-44.0f, "-30"));
 691                                         points.insert (std::pair<float,string>(-34.0f, "-20"));
 692                                         points.insert (std::pair<float,string>(-24.0f, "-10"));
 693                                         points.insert (std::pair<float,string>(-20.0f,  "-6"));
 694                                         points.insert (std::pair<float,string>(-17.0f,  "-3"));
 695                                         points.insert (std::pair<float,string>(-14.0f,  " 0"));
 696                                         points.insert (std::pair<float,string>(-11.0f,  "+3"));
 697                                         points.insert (std::pair<float,string>( -8.0f,  "+6"));
 698                                         points.insert (std::pair<float,string>( -4.0f, "+10"));
 699                                         points.insert (std::pair<float,string>(  0.0f, "+14"));
 700                                         break;
 701                                 case MeterK20:
 702                                         overlay_midi = 0;
 703                                         points.insert (std::pair<float,string>(-60.0f, "-40"));
 704                                         points.insert (std::pair<float,string>(-50.0f, "-30"));
 705                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 706                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 707                                         points.insert (std::pair<float,string>(-26.0f,  "-6"));
 708                                         points.insert (std::pair<float,string>(-23.0f,  "-3"));
 709                                         points.insert (std::pair<float,string>(-20.0f,  " 0"));
 710                                         points.insert (std::pair<float,string>(-17.0f,  "+3"));
 711                                         points.insert (std::pair<float,string>(-14.0f,  "+6"));
 712                                         points.insert (std::pair<float,string>(-10.0f, "+10"));
 713                                         points.insert (std::pair<float,string>( -5.0f, "+15"));
 714                                         points.insert (std::pair<float,string>(  0.0f, "+20"));
 715                                         break;
 716                                 default:
 717                                 case MeterPeak:
 718                                 case MeterKrms:
 719                                         points.insert (std::pair<float,string>(-50.0f, "-50"));
 720                                         points.insert (std::pair<float,string>(-40.0f, "-40"));
 721                                         points.insert (std::pair<float,string>(-30.0f, "-30"));
 722                                         points.insert (std::pair<float,string>(-20.0f, "-20"));
 723                                         if (types.size() == 1) {
 724                                                 if (ARDOUR_UI::config()->get_meter_line_up_level() == MeteringLineUp24) {
 725                                                         points.insert (std::pair<float,string>(-24.0f, "-24"));
 726                                                 } else {
 727                                                         points.insert (std::pair<float,string>(-25.0f, "-25"));
 728                                                 }
 729                                                 points.insert (std::pair<float,string>(-15.0f, "-15"));
 730                                         }
 731                                         points.insert (std::pair<float,string>(-18.0f, "-18"));
 732                                         points.insert (std::pair<float,string>(-10.0f, "-10"));
 733                                         points.insert (std::pair<float,string>( -5.0f, "-5"));
 734                                         points.insert (std::pair<float,string>( -3.0f, "-3"));
 735                                         points.insert (std::pair<float,string>(  0.0f, "+0"));
 736                                         points.insert (std::pair<float,string>(  3.0f, "+3"));
 737                                         break;
 738
 739                                 case MeterIEC2EBU:
 740                                         overlay_midi = 3;
 741                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 742                                         points.insert (std::pair<float,string>(-26.0f, "-8"));
 743                                         points.insert (std::pair<float,string>(-22.0f, "-4"));
 744                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 745                                         points.insert (std::pair<float,string>(-14.0f, "+4"));
 746                                         points.insert (std::pair<float,string>(-10.0f, "+8"));
 747                                         points.insert (std::pair<float,string>( -6.0f, "+12"));
 748                                         break;
 749
 750                                 case MeterIEC2BBC:
 751                                         overlay_midi = 3;
 752                                         points.insert (std::pair<float,string>(-30.0f, " 1 "));
 753                                         points.insert (std::pair<float,string>(-26.0f, " 2 "));
 754                                         points.insert (std::pair<float,string>(-22.0f, " 3 "));
 755                                         points.insert (std::pair<float,string>(-18.0f, " 4 "));
 756                                         points.insert (std::pair<float,string>(-14.0f, " 5 "));
 757                                         points.insert (std::pair<float,string>(-10.0f, " 6 "));
 758                                         points.insert (std::pair<float,string>( -6.0f, " 7 "));
 759                                         break;
 760
 761                                 case MeterIEC1NOR:
 762                                         overlay_midi = 0;
 763                                         //points.insert (std::pair<float,string>(-60.0f, "-42"));
 764                                         points.insert (std::pair<float,string>(-54.0f, "-36"));
 765                                         points.insert (std::pair<float,string>(-48.0f, "-30"));
 766                                         points.insert (std::pair<float,string>(-42.0f, "-24"));
 767                                         points.insert (std::pair<float,string>(-36.0f, "-18"));
 768
 769                                         //points.insert (std::pair<float,string>(-33.0f, "-15"));
 770                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 771                                         //points.insert (std::pair<float,string>(-27.0f, "-9"));
 772                                         points.insert (std::pair<float,string>(-24.0f, "-6"));
 773                                         //points.insert (std::pair<float,string>(-21.0f, "-3"));
 774
 775                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 776                                         //points.insert (std::pair<float,string>(-15.0f, "+3"));
 777                                         points.insert (std::pair<float,string>(-12.0f, "+6"));
 778                                         points.insert (std::pair<float,string>( -9.0f, "+9"));
 779                                         //points.insert (std::pair<float,string>( -6.0f, "+12"));
 780                                         break;
 781
 782                                 case MeterIEC1DIN:
 783                                         overlay_midi = 2;
 784                                         //points.insert (std::pair<float,string>( -3.0f, "200%"));
 785                                         points.insert (std::pair<float,string>( -4.0f, "+5"));
 786                                         points.insert (std::pair<float,string>( -9.0f, "0")); // "100%";
 787                                         points.insert (std::pair<float,string>(-14.0f, "-5"));
 788                                         //points.insert (std::pair<float,string>(-15.0f, "50%"));
 789                                         //points.insert (std::pair<float,string>(-18.0f, "-9"));
 790                                         points.insert (std::pair<float,string>(-19.0f, "-10")); // "30%"
 791                                         points.insert (std::pair<float,string>(-29.0f, "-20")); // "10%"
 792                                         //points.insert (std::pair<float,string>(-35.0f, "5%")); // "5%"
 793                                         points.insert (std::pair<float,string>(-39.0f, "-30"));
 794                                         //points.insert (std::pair<float,string>(-49.0f, "1%"));
 795                                         points.insert (std::pair<float,string>(-59.0f, "-50"));
 796                                         break;
 797
 798                                 case MeterVU:
 799                                         overlay_midi = 0;
 800                                         points.insert (std::pair<float,string>(-17.0f, "+3"));
 801                                         points.insert (std::pair<float,string>(-18.0f, "+2"));
 802                                         points.insert (std::pair<float,string>(-19.0f, "+1"));
 803                                         points.insert (std::pair<float,string>(-20.0f, " 0"));
 804                                         points.insert (std::pair<float,string>(-21.0f, "-1"));
 805                                         points.insert (std::pair<float,string>(-22.0f, "-2"));
 806                                         points.insert (std::pair<float,string>(-23.0f, "-3"));
 807                                         points.insert (std::pair<float,string>(-25.0f, "-5"));
 808                                         points.insert (std::pair<float,string>(-27.0f, "-7"));
 809                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 810                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 811                                         break;
 812                         }
 813                         break;
 814                 case DataType::MIDI:
 815                         layout->set_attributes (midi_font_attributes);
 816                         if (types.size() == 1) {
 817                                 points.insert (std::pair<float,string>(  0, "0"));
 818                                 points.insert (std::pair<float,string>( 16,  "16"));
 819                                 points.insert (std::pair<float,string>( 32,  "32"));
 820                                 points.insert (std::pair<float,string>( 48,  "48"));
 821                                 points.insert (std::pair<float,string>( 64,  "64"));
 822                                 points.insert (std::pair<float,string>( 80,  "80"));
 823                                 points.insert (std::pair<float,string>( 96,  "96"));
 824                                 points.insert (std::pair<float,string>(100, "100"));
 825                                 points.insert (std::pair<float,string>(112, "112"));
 826                         } else {
 827                                 switch (overlay_midi) {
 828                                         case 1:
 829                                                 /* labels that don't overlay with dBFS */
 830                                                 points.insert (std::pair<float,string>(  0, "0"));
 831                                                 points.insert (std::pair<float,string>( 24, "24"));
 832                                                 points.insert (std::pair<float,string>( 48, "48"));
 833                                                 points.insert (std::pair<float,string>( 72, "72"));
 834                                                 points.insert (std::pair<float,string>(127, "127"));
 835                                                 break;
 836                                         case 2:
 837                                                 /* labels that don't overlay with DIN */
 838                                                 points.insert (std::pair<float,string>(  0, "0"));
 839                                                 points.insert (std::pair<float,string>( 16,  "16"));
 840                                                 points.insert (std::pair<float,string>( 40,  "40"));
 841                                                 points.insert (std::pair<float,string>( 64,  "64"));
 842                                                 points.insert (std::pair<float,string>(112, "112"));
 843                                                 points.insert (std::pair<float,string>(127, "127"));
 844                                                 break;
 845                                         case 3:
 846                                                 /* labels that don't overlay with BBC nor EBU*/
 847                                                 points.insert (std::pair<float,string>(  0, "0"));
 848                                                 points.insert (std::pair<float,string>( 16, "16"));
 849                                                 points.insert (std::pair<float,string>( 56, "56"));
 850                                                 points.insert (std::pair<float,string>( 72, "72"));
 851                                                 points.insert (std::pair<float,string>(112, "112"));
 852                                                 points.insert (std::pair<float,string>(127, "127"));
 853                                         default:
 854                                                 break;
 855                                 }
 856                         }
 857                         break;
 858                 }
 859
 860                 gint pos = -1;
 861
 862                 for (std::map<float,string>::const_iterator j = points.begin(); j != points.end(); ++j) {
 863                         float fraction = 0;
 864                         bool align_center = background; // this is true for meterbridge meters w/ fixed background
 865                         switch (*i) {
 866                                 case DataType::AUDIO:
 867                                         fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 868
 869                                         pos = height - (gint) floor (height * fraction);
 870                                         pos = max (pos, 1);
 871                                         if (tickleft) {
 872                                                 cairo_move_to(cr, width-1.5, pos + .5);
 873                                                 cairo_line_to(cr, width, pos + .5);
 874                                                 cairo_stroke (cr);
 875                                         } else if (tickright) {
 876                                                 cairo_move_to(cr, 0, pos + .5);
 877                                                 cairo_line_to(cr, 1.5, pos + .5);
 878                                                 cairo_stroke (cr);
 879                                         }
 880                                         break;
 881
 882                                 case DataType::MIDI:
 883                                         align_center = false; // don't bleed into legend
 884                                         fraction = (j->first) / 127.0;
 885                                         pos = 1 + height - (gint) lrintf (height * fraction);
 886                                         pos = min (pos, height);
 887                                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 888                                         if (tickleft) {
 889                                                 cairo_arc(cr, width - 2.0, pos + .5, 1.0, 0, 2 * M_PI);
 890                                                 cairo_fill(cr);
 891                                         } else if (tickright) {
 892                                                 cairo_arc(cr, 3, pos + .5, 1.0, 0, 2 * M_PI);
 893                                                 cairo_fill(cr);
 894                                         }
 895                                         break;
 896                         }
 897
 898                         if (pos < 0) continue;
 899
 900                         layout->set_text(j->second.c_str());
 901
 902                         int tw, th;
 903                         layout->get_pixel_size(tw, th);
 904
 905                         int p = pos - (th / 2) - 1;
 906                         p = min (p, height - th);
 907                         p = max (p, 0);
 908
 909                         if (align_center) {
 910                                 cairo_move_to (cr, (width-tw)/2.0, p);
 911                         } else {
 912                                 cairo_move_to (cr, width-3-tw, p);
 913                         }
 914
 915                         cairo_set_line_width(cr, 0.12);
 916                         cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
 917                         pango_cairo_layout_path(cr, layout->gobj());
 918                         cairo_stroke_preserve (cr);
 919                         cairo_set_line_width(cr, 1.0);
 920
 921                         if ((*i) == DataType::AUDIO) {
 922                                 mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 923                         } else {
 924                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 925                         }
 926
 927                         pango_cairo_show_layout (cr, layout->gobj());
 928                         cairo_new_path(cr);
 929                 }
 930         }
 931
 932         // add legend
 933         if (types.size() == 1 || overlay_midi == 0) {
 934                 int tw, th;
 935                 layout->set_attributes (unit_font_attributes);
 936                 switch (types.at(0)) {
 937                         case DataType::AUDIO:
 938                                 switch (type) {
 939                                         case MeterK20:
 940                                                 layout->set_text("K20");
 941                                                 break;
 942                                         case MeterK14:
 943                                                 layout->set_text("K14");
 944                                                 break;
 945                                         case MeterK12:
 946                                                 layout->set_text("K12");
 947                                                 break;
 948                                         default:
 949                                         case MeterPeak:
 950                                         case MeterKrms:
 951                                                 layout->set_text("dBFS");
 952                                                 break;
 953                                         case MeterIEC2EBU:
 954                                                 layout->set_text("EBU");
 955                                                 break;
 956                                         case MeterIEC2BBC:
 957                                                 layout->set_text("BBC");
 958                                                 break;
 959                                         case MeterIEC1DIN:
 960                                                 layout->set_text("DIN");
 961                                                 break;
 962                                         case MeterIEC1NOR:
 963                                                 layout->set_text("NOR");
 964                                                 break;
 965                                         case MeterVU:
 966                                                 layout->set_text("VU");
 967                                                 break;
 968                                 }
 969                                 layout->get_pixel_size(tw, th);
 970                                 break;
 971                         case DataType::MIDI:
 972                                 layout->set_text("mid");
 973                                 layout->get_pixel_size(tw, th);
 974                                 break;
 975                 }
 976                 if (!background) {
 977                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 978                 }
 979                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 980                 if (tickleft) {
 981                         cairo_move_to (cr, width - 2 - tw, height - th - 0.5);
 982                 } else {
 983                         cairo_move_to (cr, 2, height - th - 0.5);
 984                 }
 985                 pango_cairo_show_layout (cr, layout->gobj());
 986         }
 987
 988         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 989
 990         cairo_destroy (cr);
 991         cairo_surface_destroy (surface);
 992
 993         return pattern;
 994 }
 995
 996 gint
 997 ArdourMeter::meter_expose_ticks (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mta)
 998 {
 999         Glib::RefPtr<Gdk::Window> win (mta->get_window());
1000         cairo_t* cr;
1001
1002         cr = gdk_cairo_create (win->gobj());
1003
1004         /* clip to expose area */
1005
1006         gdk_cairo_rectangle (cr, &ev->area);
1007         cairo_clip (cr);
1008
1009         cairo_pattern_t* pattern;
1010         const MeterMatricsMapKey key (mta->get_name(), type, types_to_bit(types));
1011         MetricPatternMap::iterator i = ticks_patterns.find (key);
1012
1013         if (i == ticks_patterns.end()) {
1014                 pattern = meter_render_ticks (*mta, type, types);
1015                 ticks_patterns[key] = pattern;
1016         } else {
1017                 pattern = i->second;
1018         }
1019
1020         cairo_move_to (cr, 0, 0);
1021         cairo_set_source (cr, pattern);
1022
1023         gint width, height;
1024         win->get_size (width, height);
1025
1026         cairo_rectangle (cr, 0, 0, width, height);
1027         cairo_fill (cr);
1028
1029         cairo_destroy (cr);
1030
1031         return true;
1032 }
1033
1034 gint
1035 ArdourMeter::meter_expose_metrics (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mma)
1036 {
1037         Glib::RefPtr<Gdk::Window> win (mma->get_window());
1038         cairo_t* cr;
1039
1040         cr = gdk_cairo_create (win->gobj());
1041
1042         /* clip to expose area */
1043
1044         gdk_cairo_rectangle (cr, &ev->area);
1045         cairo_clip (cr);
1046
1047         cairo_pattern_t* pattern;
1048         const MeterMatricsMapKey key (mma->get_name(), type, types_to_bit(types));
1049         MetricPatternMap::iterator i = metric_patterns.find (key);
1050
1051         if (i == metric_patterns.end()) {
1052                 pattern = meter_render_metrics (*mma, type, types);
1053                 metric_patterns[key] = pattern;
1054         } else {
1055                 pattern = i->second;
1056         }
1057
1058         cairo_move_to (cr, 0, 0);
1059         cairo_set_source (cr, pattern);
1060
1061         gint width, height;
1062         win->get_size (width, height);
1063
1064         cairo_rectangle (cr, 0, 0, width, height);
1065         cairo_fill (cr);
1066
1067         cairo_destroy (cr);
1068
1069         return true;
1070 }
1071
1072 void
1073 ArdourMeter::meter_clear_pattern_cache(int which) {
1074         MetricPatternMap::iterator i = metric_patterns.begin();
1075         MetricPatternMap::iterator j = ticks_patterns.begin();
1076
1077         while (i != metric_patterns.end()) {
1078                 int m = 4;
1079                 MeterMatricsMapKey const * const key = &(i->first);
1080                 std::string n = key->_n;
1081                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1082                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1083                 if (which & m) {
1084                         cairo_pattern_destroy(i->second);
1085                         metric_patterns.erase(i++);
1086                 } else {
1087                         ++i;
1088                 }
1089         }
1090
1091         while (j != ticks_patterns.end()) {
1092                 int m = 4;
1093                 MeterMatricsMapKey const * const key = &(j->first);
1094                 std::string n = key->_n;
1095                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1096                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1097                 if (which & m) {
1098                         cairo_pattern_destroy(j->second);
1099                         ticks_patterns.erase(j++);
1100                 } else {
1101                         ++j;
1102                 }
1103         }
1104         RedrawMetrics();
1105 }