gtk2_ardour/meter_patterns.cc

   1 /*
   2     Copyright (C) 2013 Paul Davis
   3     Author: Robin Gareus
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include <gtkmm2ext/cairo_widget.h>
  21 #include <gtkmm2ext/gtk_ui.h>
  22 #include <gtkmm2ext/utils.h>
  23 #include <gtkmm2ext/rgb_macros.h>
  24
  25 #include <ardour/rc_configuration.h>
  26 #include "ardour_ui.h"
  27 #include "utils.h"
  28 #include "logmeter.h"
  29 #include "meter_patterns.h"
  30
  31 #include "i18n.h"
  32
  33 using namespace ARDOUR;
  34 using namespace PBD;
  35 using namespace Gtk;
  36 using namespace Gtkmm2ext;
  37 using namespace std;
  38 using namespace ArdourMeter;
  39
  40 static const int max_pattern_metric_size = 1026;
  41
  42 /* signals used by meters */
  43
  44 sigc::signal<void> ArdourMeter::ResetAllPeakDisplays;
  45 sigc::signal<void,ARDOUR::Route*> ArdourMeter::ResetRoutePeakDisplays;
  46 sigc::signal<void,ARDOUR::RouteGroup*> ArdourMeter::ResetGroupPeakDisplays;
  47 sigc::signal<void> ArdourMeter::RedrawMetrics;
  48
  49 sigc::signal<void, int, ARDOUR::RouteGroup*, ARDOUR::MeterType> ArdourMeter::SetMeterTypeMulti;
  50
  51
  52 /* pattern cache */
  53
  54 struct MeterMatricsMapKey {
  55         MeterMatricsMapKey (std::string n, MeterType t, int dt)
  56                 : _n(n)
  57                 , _t(t)
  58                 , _dt(dt)
  59         {}
  60         inline bool operator<(const MeterMatricsMapKey& rhs) const {
  61                 return (_n < rhs._n) || (_n == rhs._n && _t < rhs._t) || (_n == rhs._n && _t == rhs._t && _dt < rhs._dt);
  62         }
  63         std::string _n;
  64         MeterType _t;
  65         int _dt;
  66 };
  67
  68 namespace ArdourMeter {
  69         typedef std::map<MeterMatricsMapKey, cairo_pattern_t*> MetricPatternMap;
  70 }
  71
  72 static ArdourMeter::MetricPatternMap ticks_patterns;
  73 static ArdourMeter::MetricPatternMap metric_patterns;
  74
  75
  76 const std::string
  77 ArdourMeter::meter_type_string (ARDOUR::MeterType mt)
  78 {
  79         switch (mt) {
  80                 case MeterPeak:
  81                         return _("Peak");
  82                         break;
  83                 case MeterKrms:
  84                         return _("RMS + Peak");
  85                         break;
  86                 case MeterIEC1DIN:
  87                         return _("IEC1/DIN");
  88                         break;
  89                 case MeterIEC1NOR:
  90                         return _("IEC1/Nordic");
  91                         break;
  92                 case MeterIEC2BBC:
  93                         return _("IEC2/BBC");
  94                         break;
  95                 case MeterIEC2EBU:
  96                         return _("IEC2/EBU");
  97                         break;
  98                 case MeterK20:
  99                         return _("K20");
 100                         break;
 101                 case MeterK14:
 102                         return _("K14");
 103                         break;
 104                 case MeterK12:
 105                         return _("K12");
 106                         break;
 107                 case MeterVU:
 108                         return _("VU");
 109                         break;
 110                 default:
 111                         return _("???");
 112                         break;
 113         }
 114 }
 115
 116 static inline int types_to_bit (vector<ARDOUR::DataType> types) {
 117         int rv = 0;
 118         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 119                 rv |= 1 << (*i);
 120         }
 121         return rv;
 122 }
 123
 124 static inline float mtr_col_and_fract(
 125                 cairo_t* cr, Gdk::Color const * const c, const uint32_t peakcolor, const MeterType mt, const float val)
 126 {
 127         float fraction = 0;
 128
 129         switch (mt) {
 130                 default:
 131                 case MeterKrms:
 132                 case MeterPeak:
 133                         fraction = log_meter (val);
 134                         if (val >= 0 || val == -9) {
 135                                 cairo_set_source_rgb (cr,
 136                                                 UINT_RGBA_R_FLT(peakcolor),
 137                                                 UINT_RGBA_G_FLT(peakcolor),
 138                                                 UINT_RGBA_B_FLT(peakcolor));
 139                         } else {
 140                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 141                         }
 142                         break;
 143                 case MeterIEC2BBC:
 144                 case MeterIEC2EBU:
 145                         fraction = meter_deflect_ppm(val);
 146                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 147                         break;
 148                 case MeterIEC1NOR:
 149                         fraction = meter_deflect_nordic(val);
 150 #if 0
 151                         if (val == -18.0) {
 152                                 cairo_set_source_rgb (cr,
 153                                                 UINT_RGBA_R_FLT(peakcolor),
 154                                                 UINT_RGBA_G_FLT(peakcolor),
 155                                                 UINT_RGBA_B_FLT(peakcolor));
 156                         } else {
 157                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 158                         }
 159 #else
 160                         cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 161 #endif
 162                         break;
 163                 case MeterIEC1DIN:
 164                         fraction = meter_deflect_din(val);
 165                         if (val == -9.0 || val == -15 || val == -18) {
 166                                 cairo_set_source_rgb (cr,
 167                                                 UINT_RGBA_R_FLT(peakcolor),
 168                                                 UINT_RGBA_G_FLT(peakcolor),
 169                                                 UINT_RGBA_B_FLT(peakcolor));
 170                         } else {
 171                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 172                         }
 173                         break;
 174                 case MeterVU:
 175                         fraction = meter_deflect_vu(val);
 176                         if (val >= -20.0) {
 177                                 cairo_set_source_rgb (cr,
 178                                                 UINT_RGBA_R_FLT(peakcolor),
 179                                                 UINT_RGBA_G_FLT(peakcolor),
 180                                                 UINT_RGBA_B_FLT(peakcolor));
 181                         } else {
 182                                 cairo_set_source_rgb (cr, c->get_red_p(), c->get_green_p(), c->get_blue_p());
 183                         }
 184                         break;
 185                 case MeterK20:
 186                         fraction = meter_deflect_k (val, 20);
 187                         if (val >= -16.0) {
 188                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 189                         } else if (val >= -20.0) {
 190                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 191                         } else {
 192                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 193                         }
 194                         break;
 195                 case MeterK14:
 196                         if (val >= -10.0) {
 197                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 198                         } else if (val >= -14.0) {
 199                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 200                         } else {
 201                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 202                         }
 203                         fraction = meter_deflect_k (val, 14);
 204                         break;
 205                 case MeterK12:
 206                         if (val >= -8.0) {
 207                                 cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); // red
 208                         } else if (val >= -12.0) {
 209                                 cairo_set_source_rgb (cr, 0.8, 0.8, 0.0); // yellow
 210                         } else {
 211                                 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); // green
 212                         }
 213                         fraction = meter_deflect_k (val, 12);
 214                         break;
 215         }
 216         return fraction;
 217 }
 218
 219 static void mtr_red_stripe(cairo_t* cr, float l, float w, int h, float top, float bot) {
 220         if (w <= 0) return;
 221         int t = h - floorf (h * (top));
 222         int b = h - floorf (h * (bot));
 223         cairo_set_source_rgba (cr, .75, 0, 0, 0.75);
 224         cairo_rectangle (cr, l, t + .5, w, b - t);
 225         cairo_fill (cr);
 226 }
 227
 228 static void set_bg_color(Gtk::Widget& w, cairo_t* cr, MeterType type) {
 229         float r,g,b;
 230         switch(type) {
 231                 case MeterVU:
 232                         if (rgba_p_from_style("meterstripVU", &r, &g, &b, "bg")) {
 233                                 cairo_set_source_rgb (cr, r, g, b);
 234                         } else {
 235                                 cairo_set_source_rgb (cr, 1.0, 1.0, 0.85);
 236                         }
 237                         break;
 238                 case MeterIEC1DIN:
 239                 case MeterIEC1NOR:
 240                 case MeterIEC2BBC:
 241                 case MeterIEC2EBU:
 242                 case MeterK12:
 243                 case MeterK14:
 244                 case MeterK20:
 245                         if (rgba_p_from_style("meterstripPPM", &r, &g, &b, "bg")) {
 246                                 cairo_set_source_rgb (cr, r, g, b);
 247                         } else {
 248                                 cairo_set_source_rgb (cr, 0.1, 0.1, 0.1);
 249                         }
 250                         break;
 251                 default:
 252                         {
 253                         Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_ACTIVE);
 254                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 255                         }
 256                         break;
 257         }
 258 }
 259
 260 static void set_fg_color(Gtk::Widget&, MeterType type, Gdk::Color * c) {
 261         float r,g,b;
 262         switch(type) {
 263                 case MeterVU:
 264                         if (rgba_p_from_style("meterstripVU", &r, &g, &b)) {
 265                                 c->set_rgb_p(r, g, b);
 266                         } else {
 267                                 c->set_rgb_p(0.0, 0.0, 0.0);
 268                         }
 269                         break;
 270                 default:
 271                         if (rgba_p_from_style("meterstripPPM", &r, &g, &b)) {
 272                                 c->set_rgb_p(r, g, b);
 273                         } else {
 274                                 c->set_rgb_p(1.0, 1.0, 1.0);
 275                         }
 276                         break;
 277         }
 278 }
 279
 280 static cairo_pattern_t*
 281 meter_render_ticks (Gtk::Widget& w, MeterType type, vector<ARDOUR::DataType> types)
 282 {
 283         Glib::RefPtr<Gdk::Window> win (w.get_window());
 284
 285         bool background;
 286         bool tickleft, tickright;
 287         gint width, height;
 288         win->get_size (width, height);
 289         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 290         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 291         background = types.size() == 0 || tickleft || tickright;
 292
 293         float box_l=0;
 294         float box_w=0;
 295         if (tickleft) {
 296                 if (w.get_name().substr(0, 3) == "Bar") {
 297                         box_l = width-2; box_w = 2;
 298                 } else if (w.get_name().substr(0, 4) == "Mark") {
 299                         box_l = width-2; box_w = 2;
 300                         background = false;
 301                 }
 302         } else if (tickright) {
 303                 if (w.get_name().substr(0, 3) == "Bar") {
 304                         box_l = 0; box_w = 2;
 305                 } else if (w.get_name().substr(0, 4) == "Mark") {
 306                         box_l = 0; box_w = 2;
 307                         background = false;
 308                 }
 309         } else {
 310                 box_l = 0; box_w = 3;
 311         }
 312
 313         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 314         cairo_t* cr = cairo_create (surface);
 315
 316         cairo_move_to (cr, 0, 0);
 317         cairo_rectangle (cr, 0, 0, width, height);
 318
 319         if (background) {
 320                 /* meterbridge */
 321                 set_bg_color(w, cr, type);
 322         } else {
 323                 /* mixer */
 324                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 325                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 326         }
 327         cairo_fill (cr);
 328
 329         height = min(max_pattern_metric_size, height);
 330         uint32_t peakcolor = ARDOUR_UI::config()->color_by_name ("meterbridge peaklabel");
 331
 332         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 333
 334                 Gdk::Color c;
 335                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 336                         /* we're overlaying more than 1 set of marks, so use different colours */
 337                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 338                 } else if (background) {
 339                         set_fg_color(w, type, &c);
 340                 } else {
 341                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 342                 }
 343
 344                 // tick-maker position in dBFS, line-thickness
 345                 std::map<float,float> points;
 346
 347                 switch (*i) {
 348                 case DataType::AUDIO:
 349
 350                         switch (type) {
 351                                 case MeterK12:
 352                                         points.insert (std::pair<float,float>(-52.0f, 1.0));
 353                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 354                                         points.insert (std::pair<float,float>(-32.0f, 1.0));
 355                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 356                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 357                                         points.insert (std::pair<float,float>(-15.0f, 1.0));
 358                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 359                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 360                                         points.insert (std::pair<float,float>( -8.0f, 0.8));
 361                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 362                                         points.insert (std::pair<float,float>( -3.0f, 1.0));
 363                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 364                                         break;
 365                                 case MeterK14:
 366                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 367                                         points.insert (std::pair<float,float>(-44.0f, 1.0));
 368                                         points.insert (std::pair<float,float>(-34.0f, 1.0));
 369                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 370                                         points.insert (std::pair<float,float>(-20.0f, 1.0));
 371                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 372                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); //   0
 373                                         points.insert (std::pair<float,float>(-11.0f, 1.0)); //  +3
 374                                         points.insert (std::pair<float,float>(-10.0f, 0.8)); //  +4
 375                                         points.insert (std::pair<float,float>( -8.0f, 1.0)); //  +6
 376                                         points.insert (std::pair<float,float>( -4.0f, 1.0)); // +10
 377                                         points.insert (std::pair<float,float>(  0.0f, 1.0));
 378                                         break;
 379                                 case MeterK20:
 380                                         points.insert (std::pair<float,float>(-60.0f, 1.0));
 381                                         points.insert (std::pair<float,float>(-50.0f, 1.0));
 382                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 383                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 384                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 385                                         points.insert (std::pair<float,float>(-23.0f, 1.0));
 386                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); //  0
 387                                         points.insert (std::pair<float,float>(-17.0f, 1.0));
 388                                         points.insert (std::pair<float,float>(-16.0f, 0.8));
 389                                         points.insert (std::pair<float,float>(-14.0f, 1.0)); // +6
 390                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 391                                         points.insert (std::pair<float,float>( -5.0f, 1.0));
 392                                         points.insert (std::pair<float,float>(  0.0f, 1.0)); //+20
 393                                         break;
 394                                 case MeterIEC2EBU:
 395                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 396                                         points.insert (std::pair<float,float>(-28.0f, 0.5));
 397                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 398                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 399                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 400                                         points.insert (std::pair<float,float>(-20.0f, 0.5));
 401                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 402                                         points.insert (std::pair<float,float>(-16.0f, 0.5));
 403                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 404                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 405                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 406                                         points.insert (std::pair<float,float>( -9.0f, 0.8));
 407                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 408                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 409                                         break;
 410                                 case MeterIEC2BBC:
 411                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 412                                         points.insert (std::pair<float,float>(-26.0f, 1.0));
 413                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 414                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 415                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 416                                         points.insert (std::pair<float,float>(-10.0f, 1.0));
 417                                         points.insert (std::pair<float,float>( -6.0f, 1.0));
 418                                         break;
 419                                 case MeterIEC1NOR:
 420                                         points.insert (std::pair<float,float>(-60.0f, 1.0)); // -42
 421                                         points.insert (std::pair<float,float>(-57.0f, 0.5));
 422                                         points.insert (std::pair<float,float>(-54.0f, 1.0));
 423                                         points.insert (std::pair<float,float>(-51.0f, 0.5));
 424                                         points.insert (std::pair<float,float>(-48.0f, 1.0));
 425                                         points.insert (std::pair<float,float>(-45.0f, 0.5));
 426                                         points.insert (std::pair<float,float>(-42.0f, 1.0));
 427                                         points.insert (std::pair<float,float>(-39.0f, 0.5));
 428                                         points.insert (std::pair<float,float>(-36.0f, 1.0));
 429
 430                                         points.insert (std::pair<float,float>(-33.0f, 0.5));
 431                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 432                                         points.insert (std::pair<float,float>(-27.0f, 0.5));
 433                                         points.insert (std::pair<float,float>(-24.0f, 1.0));
 434                                         points.insert (std::pair<float,float>(-21.0f, 0.5));
 435
 436                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 437                                         points.insert (std::pair<float,float>(-15.0f, 0.5));
 438                                         points.insert (std::pair<float,float>(-12.0f, 1.0));
 439                                         points.insert (std::pair<float,float>( -9.0f, 1.0));
 440                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 441                                         mtr_red_stripe(cr, box_l, box_w, height,
 442                                                         meter_deflect_nordic(-6.0f), meter_deflect_nordic(-12.0f));
 443                                         break;
 444                                 case MeterIEC1DIN:
 445                                         points.insert (std::pair<float,float>( -3.0f, 0.5)); // "200%"
 446                                         points.insert (std::pair<float,float>( -4.0f, 1.0));
 447                                         points.insert (std::pair<float,float>( -5.0f, 0.5));
 448                                         points.insert (std::pair<float,float>( -6.0f, 0.5));
 449                                         points.insert (std::pair<float,float>( -7.0f, 0.5));
 450                                         points.insert (std::pair<float,float>( -8.0f, 0.5));
 451                                         points.insert (std::pair<float,float>( -9.0f, 1.0)); // "100%"
 452                                         points.insert (std::pair<float,float>(-10.0f, 0.5));
 453                                         points.insert (std::pair<float,float>(-11.0f, 0.5));
 454                                         points.insert (std::pair<float,float>(-12.0f, 0.5));
 455                                         points.insert (std::pair<float,float>(-13.0f, 0.5));
 456                                         points.insert (std::pair<float,float>(-14.0f, 1.0));
 457                                         points.insert (std::pair<float,float>(-15.0f, 0.8)); // "50%"
 458                                         points.insert (std::pair<float,float>(-18.0f, 0.8)); // "-9"
 459                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 460                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 461                                         points.insert (std::pair<float,float>(-29.0f, 1.0)); // "-20", "10%"
 462                                         points.insert (std::pair<float,float>(-34.0f, 0.5)); // -25
 463                                         //points.insert (std::pair<float,float>(-35.0f, 0.5)); // "5%" " -20"
 464                                         points.insert (std::pair<float,float>(-39.0f, 1.0));
 465                                         points.insert (std::pair<float,float>(-49.0f, 1.0));
 466                                         points.insert (std::pair<float,float>(-54.0f, 0.5));
 467                                         points.insert (std::pair<float,float>(-59.0f, 1.0));
 468                                         mtr_red_stripe(cr, box_l, box_w, height,
 469                                                         meter_deflect_din(0.0f), meter_deflect_din(-9.0f));
 470                                         break;
 471                                 case MeterVU:
 472                                         points.insert (std::pair<float,float>(-17.0f, 1.0)); //+3 VU
 473                                         points.insert (std::pair<float,float>(-18.0f, 1.0));
 474                                         points.insert (std::pair<float,float>(-19.0f, 1.0));
 475                                         points.insert (std::pair<float,float>(-19.5f, 0.5));
 476                                         points.insert (std::pair<float,float>(-20.0f, 1.0)); // 0 VU
 477                                         points.insert (std::pair<float,float>(-20.5f, 0.5));
 478                                         points.insert (std::pair<float,float>(-21.0f, 1.0));
 479                                         points.insert (std::pair<float,float>(-22.0f, 1.0));
 480                                         points.insert (std::pair<float,float>(-23.0f, 1.0)); //-3 VU
 481                                         points.insert (std::pair<float,float>(-24.0f, 0.5));
 482                                         points.insert (std::pair<float,float>(-25.0f, 1.0));
 483                                         points.insert (std::pair<float,float>(-26.0f, 0.5));
 484                                         points.insert (std::pair<float,float>(-27.0f, 1.0)); //-7 VU
 485                                         points.insert (std::pair<float,float>(-30.0f, 1.0));
 486                                         points.insert (std::pair<float,float>(-35.0f, 0.5));
 487                                         points.insert (std::pair<float,float>(-40.0f, 1.0));
 488                                         mtr_red_stripe(cr, box_l, box_w, height,
 489                                                         meter_deflect_vu(-17.0f), meter_deflect_vu(-20.0f));
 490                                         break;
 491
 492                                 default:
 493                                         points.insert (std::pair<float,float>(-60, 0.5));
 494                                         points.insert (std::pair<float,float>(-50, 1.0));
 495                                         points.insert (std::pair<float,float>(-40, 1.0));
 496                                         points.insert (std::pair<float,float>(-30, 1.0));
 497                                         if (Config->get_meter_line_up_level() == MeteringLineUp24) {
 498                                                 points.insert (std::pair<float,float>(-24, 1.0));
 499                                         } else {
 500                                                 points.insert (std::pair<float,float>(-25, 1.0));
 501                                         }
 502                                         points.insert (std::pair<float,float>(-20, 1.0));
 503
 504                                         points.insert (std::pair<float,float>(-19, 0.5));
 505                                         points.insert (std::pair<float,float>(-18, 1.0));
 506                                         points.insert (std::pair<float,float>(-17, 0.5));
 507                                         points.insert (std::pair<float,float>(-16, 0.5));
 508                                         points.insert (std::pair<float,float>(-15, 1.0));
 509
 510                                         points.insert (std::pair<float,float>(-14, 0.5));
 511                                         points.insert (std::pair<float,float>(-13, 0.5));
 512                                         points.insert (std::pair<float,float>(-12, 0.5));
 513                                         points.insert (std::pair<float,float>(-11, 0.5));
 514                                         points.insert (std::pair<float,float>(-10, 1.0));
 515
 516                                         points.insert (std::pair<float,float>( -9, 1.0));
 517                                         points.insert (std::pair<float,float>( -8, 0.5));
 518                                         points.insert (std::pair<float,float>( -7, 0.5));
 519                                         points.insert (std::pair<float,float>( -6, 0.5));
 520                                         points.insert (std::pair<float,float>( -5, 1.0));
 521                                         points.insert (std::pair<float,float>( -4, 0.5));
 522                                         points.insert (std::pair<float,float>( -3, 1.0));
 523                                         points.insert (std::pair<float,float>( -2, 0.5));
 524                                         points.insert (std::pair<float,float>( -1, 0.5));
 525
 526                                         points.insert (std::pair<float,float>(  0, 1.0));
 527                                         points.insert (std::pair<float,float>(  1, 0.5));
 528                                         points.insert (std::pair<float,float>(  2, 0.5));
 529                                         points.insert (std::pair<float,float>(  3, 1.0));
 530                                         points.insert (std::pair<float,float>(  4, 0.5));
 531                                         points.insert (std::pair<float,float>(  5, 0.5));
 532                                         break;
 533                         }
 534                         break;
 535
 536                 case DataType::MIDI:
 537                         points.insert (std::pair<float,float>(  0, 1.0));
 538                         points.insert (std::pair<float,float>( 16, 0.5));
 539                         points.insert (std::pair<float,float>( 32, 0.5));
 540                         points.insert (std::pair<float,float>( 48, 0.5));
 541                         points.insert (std::pair<float,float>( 64, 1.0));
 542                         points.insert (std::pair<float,float>( 80, 0.5));
 543                         points.insert (std::pair<float,float>( 96, 0.5));
 544                         points.insert (std::pair<float,float>(100, 1.0));
 545                         points.insert (std::pair<float,float>(112, 0.5));
 546                         points.insert (std::pair<float,float>(127, 1.0));
 547                         break;
 548                 }
 549
 550                 for (std::map<float,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
 551                         cairo_set_line_width (cr, (j->second));
 552
 553                         float fraction = 0;
 554                         gint pos;
 555
 556                         switch (*i) {
 557                         case DataType::AUDIO:
 558                                 fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 559
 560                                 pos = height - (gint) floor (height * fraction);
 561                                 pos = max (pos, 1);
 562                                 cairo_move_to(cr, 0, pos + .5);
 563                                 cairo_line_to(cr, 3, pos + .5);
 564                                 cairo_stroke (cr);
 565                                 break;
 566                         case DataType::MIDI:
 567                                 fraction = (j->first) / 127.0;
 568                                 pos = 1 + height - (gint) floor (height * fraction);
 569                                 pos = min (pos, height);
 570                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 571                                 cairo_arc(cr, 1.5, pos + .5, 1.0, 0, 2 * M_PI);
 572                                 cairo_fill(cr);
 573                                 break;
 574                         }
 575                 }
 576         }
 577
 578         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 579
 580         cairo_destroy (cr);
 581         cairo_surface_destroy (surface);
 582
 583         return pattern;
 584 }
 585
 586 static cairo_pattern_t*
 587 meter_render_metrics (Gtk::Widget& w, MeterType type, vector<DataType> types)
 588 {
 589         Glib::RefPtr<Gdk::Window> win (w.get_window());
 590
 591         bool tickleft, tickright;
 592         bool background;
 593         int overlay_midi = 1;
 594         gint width, height;
 595         win->get_size (width, height);
 596
 597         tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
 598         tickright = w.get_name().substr(w.get_name().length() - 5) == "Right";
 599         background = types.size() == 0 || tickleft || tickright;
 600
 601         if (!tickleft && !tickright) {
 602                 tickright = true;
 603         }
 604
 605         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 606         cairo_t* cr = cairo_create (surface);
 607         Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
 608
 609         Pango::AttrList audio_font_attributes;
 610         Pango::AttrList midi_font_attributes;
 611         Pango::AttrList unit_font_attributes;
 612
 613         Pango::AttrFontDesc* font_attr;
 614         Pango::FontDescription font;
 615
 616         font = Pango::FontDescription (ARDOUR_UI::config()->get_canvasvar_SmallMonospaceFont());
 617         double fixfontsize = 81920.0 / (double) ARDOUR::Config->get_font_scale();
 618
 619         font.set_weight (Pango::WEIGHT_NORMAL);
 620         font.set_size (9.0 * PANGO_SCALE * fixfontsize);
 621         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 622         audio_font_attributes.change (*font_attr);
 623         delete font_attr;
 624
 625         font.set_weight (Pango::WEIGHT_ULTRALIGHT);
 626         font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
 627         font.set_size (8.0 * PANGO_SCALE * fixfontsize);
 628         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 629         midi_font_attributes.change (*font_attr);
 630         delete font_attr;
 631
 632         font.set_size (6.0 * PANGO_SCALE * fixfontsize);
 633         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 634         unit_font_attributes.change (*font_attr);
 635         delete font_attr;
 636
 637         cairo_move_to (cr, 0, 0);
 638         cairo_rectangle (cr, 0, 0, width, height);
 639         if (background) {
 640                 /* meterbridge */
 641                 set_bg_color(w, cr, type);
 642         } else {
 643                 /* mixer */
 644                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 645                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 646         }
 647         cairo_fill (cr);
 648
 649         cairo_set_line_width (cr, 1.0);
 650
 651         height = min(max_pattern_metric_size, height);
 652         uint32_t peakcolor = ARDOUR_UI::config()->color_by_name ("meterbridge peaklabel");
 653         Gdk::Color c; // default text color
 654
 655         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 656
 657                 if (types.size() > 1 && (*i) == DataType::MIDI && overlay_midi == 0) {
 658                         continue;
 659                 }
 660
 661                 if (types.size() > 1 && (*i) == DataType::MIDI) {
 662                         /* we're overlaying more than 1 set of marks, so use different colours */
 663                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 664                 } else if (background) {
 665                         set_fg_color(w, type, &c);
 666                 } else {
 667                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 668                 }
 669
 670                 std::map<float,string> points; // map: label-pos in dBFS, label-text
 671
 672                 switch (*i) {
 673                 case DataType::AUDIO:
 674                         layout->set_attributes (audio_font_attributes);
 675                         switch (type) {
 676                                 case MeterK12:
 677                                         overlay_midi = 0;
 678                                         points.insert (std::pair<float,string>(-52.0f, "-40"));
 679                                         points.insert (std::pair<float,string>(-42.0f, "-30"));
 680                                         points.insert (std::pair<float,string>(-32.0f, "-20"));
 681                                         points.insert (std::pair<float,string>(-22.0f, "-10"));
 682                                         points.insert (std::pair<float,string>(-18.0f,  "-6"));
 683                                         points.insert (std::pair<float,string>(-15.0f,  "-3"));
 684                                         points.insert (std::pair<float,string>(-12.0f,  " 0"));
 685                                         points.insert (std::pair<float,string>( -9.0f,  "+3"));
 686                                         points.insert (std::pair<float,string>( -6.0f,  "+6"));
 687                                         points.insert (std::pair<float,string>( -3.0f,  "+9"));
 688                                         points.insert (std::pair<float,string>(  0.0f, "+12"));
 689                                         break;
 690                                 case MeterK14:
 691                                         overlay_midi = 0;
 692                                         points.insert (std::pair<float,string>(-54.0f, "-40"));
 693                                         points.insert (std::pair<float,string>(-44.0f, "-30"));
 694                                         points.insert (std::pair<float,string>(-34.0f, "-20"));
 695                                         points.insert (std::pair<float,string>(-24.0f, "-10"));
 696                                         points.insert (std::pair<float,string>(-20.0f,  "-6"));
 697                                         points.insert (std::pair<float,string>(-17.0f,  "-3"));
 698                                         points.insert (std::pair<float,string>(-14.0f,  " 0"));
 699                                         points.insert (std::pair<float,string>(-11.0f,  "+3"));
 700                                         points.insert (std::pair<float,string>( -8.0f,  "+6"));
 701                                         points.insert (std::pair<float,string>( -4.0f, "+10"));
 702                                         points.insert (std::pair<float,string>(  0.0f, "+14"));
 703                                         break;
 704                                 case MeterK20:
 705                                         overlay_midi = 0;
 706                                         points.insert (std::pair<float,string>(-60.0f, "-40"));
 707                                         points.insert (std::pair<float,string>(-50.0f, "-30"));
 708                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 709                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 710                                         points.insert (std::pair<float,string>(-26.0f,  "-6"));
 711                                         points.insert (std::pair<float,string>(-23.0f,  "-3"));
 712                                         points.insert (std::pair<float,string>(-20.0f,  " 0"));
 713                                         points.insert (std::pair<float,string>(-17.0f,  "+3"));
 714                                         points.insert (std::pair<float,string>(-14.0f,  "+6"));
 715                                         points.insert (std::pair<float,string>(-10.0f, "+10"));
 716                                         points.insert (std::pair<float,string>( -5.0f, "+15"));
 717                                         points.insert (std::pair<float,string>(  0.0f, "+20"));
 718                                         break;
 719                                 default:
 720                                 case MeterPeak:
 721                                 case MeterKrms:
 722                                         points.insert (std::pair<float,string>(-50.0f, "-50"));
 723                                         points.insert (std::pair<float,string>(-40.0f, "-40"));
 724                                         points.insert (std::pair<float,string>(-30.0f, "-30"));
 725                                         points.insert (std::pair<float,string>(-20.0f, "-20"));
 726                                         if (types.size() == 1) {
 727                                                 if (Config->get_meter_line_up_level() == MeteringLineUp24) {
 728                                                         points.insert (std::pair<float,string>(-24.0f, "-24"));
 729                                                 } else {
 730                                                         points.insert (std::pair<float,string>(-25.0f, "-25"));
 731                                                 }
 732                                                 points.insert (std::pair<float,string>(-15.0f, "-15"));
 733                                         }
 734                                         points.insert (std::pair<float,string>(-18.0f, "-18"));
 735                                         points.insert (std::pair<float,string>(-10.0f, "-10"));
 736                                         points.insert (std::pair<float,string>( -5.0f, "-5"));
 737                                         points.insert (std::pair<float,string>( -3.0f, "-3"));
 738                                         points.insert (std::pair<float,string>(  0.0f, "+0"));
 739                                         points.insert (std::pair<float,string>(  3.0f, "+3"));
 740                                         break;
 741
 742                                 case MeterIEC2EBU:
 743                                         overlay_midi = 3;
 744                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 745                                         points.insert (std::pair<float,string>(-26.0f, "-8"));
 746                                         points.insert (std::pair<float,string>(-22.0f, "-4"));
 747                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 748                                         points.insert (std::pair<float,string>(-14.0f, "+4"));
 749                                         points.insert (std::pair<float,string>(-10.0f, "+8"));
 750                                         points.insert (std::pair<float,string>( -6.0f, "+12"));
 751                                         break;
 752
 753                                 case MeterIEC2BBC:
 754                                         overlay_midi = 3;
 755                                         points.insert (std::pair<float,string>(-30.0f, " 1 "));
 756                                         points.insert (std::pair<float,string>(-26.0f, " 2 "));
 757                                         points.insert (std::pair<float,string>(-22.0f, " 3 "));
 758                                         points.insert (std::pair<float,string>(-18.0f, " 4 "));
 759                                         points.insert (std::pair<float,string>(-14.0f, " 5 "));
 760                                         points.insert (std::pair<float,string>(-10.0f, " 6 "));
 761                                         points.insert (std::pair<float,string>( -6.0f, " 7 "));
 762                                         break;
 763
 764                                 case MeterIEC1NOR:
 765                                         overlay_midi = 0;
 766                                         //points.insert (std::pair<float,string>(-60.0f, "-42"));
 767                                         points.insert (std::pair<float,string>(-54.0f, "-36"));
 768                                         points.insert (std::pair<float,string>(-48.0f, "-30"));
 769                                         points.insert (std::pair<float,string>(-42.0f, "-24"));
 770                                         points.insert (std::pair<float,string>(-36.0f, "-18"));
 771
 772                                         //points.insert (std::pair<float,string>(-33.0f, "-15"));
 773                                         points.insert (std::pair<float,string>(-30.0f, "-12"));
 774                                         //points.insert (std::pair<float,string>(-27.0f, "-9"));
 775                                         points.insert (std::pair<float,string>(-24.0f, "-6"));
 776                                         //points.insert (std::pair<float,string>(-21.0f, "-3"));
 777
 778                                         points.insert (std::pair<float,string>(-18.0f, "TST"));
 779                                         //points.insert (std::pair<float,string>(-15.0f, "+3"));
 780                                         points.insert (std::pair<float,string>(-12.0f, "+6"));
 781                                         points.insert (std::pair<float,string>( -9.0f, "+9"));
 782                                         //points.insert (std::pair<float,string>( -6.0f, "+12"));
 783                                         break;
 784
 785                                 case MeterIEC1DIN:
 786                                         overlay_midi = 2;
 787                                         //points.insert (std::pair<float,string>( -3.0f, "200%"));
 788                                         points.insert (std::pair<float,string>( -4.0f, "+5"));
 789                                         points.insert (std::pair<float,string>( -9.0f, "0")); // "100%";
 790                                         points.insert (std::pair<float,string>(-14.0f, "-5"));
 791                                         //points.insert (std::pair<float,string>(-15.0f, "50%"));
 792                                         //points.insert (std::pair<float,string>(-18.0f, "-9"));
 793                                         points.insert (std::pair<float,string>(-19.0f, "-10")); // "30%"
 794                                         points.insert (std::pair<float,string>(-29.0f, "-20")); // "10%"
 795                                         //points.insert (std::pair<float,string>(-35.0f, "5%")); // "5%"
 796                                         points.insert (std::pair<float,string>(-39.0f, "-30"));
 797                                         //points.insert (std::pair<float,string>(-49.0f, "1%"));
 798                                         points.insert (std::pair<float,string>(-59.0f, "-50"));
 799                                         break;
 800
 801                                 case MeterVU:
 802                                         overlay_midi = 0;
 803                                         points.insert (std::pair<float,string>(-17.0f, "+3"));
 804                                         points.insert (std::pair<float,string>(-18.0f, "+2"));
 805                                         points.insert (std::pair<float,string>(-19.0f, "+1"));
 806                                         points.insert (std::pair<float,string>(-20.0f, " 0"));
 807                                         points.insert (std::pair<float,string>(-21.0f, "-1"));
 808                                         points.insert (std::pair<float,string>(-22.0f, "-2"));
 809                                         points.insert (std::pair<float,string>(-23.0f, "-3"));
 810                                         points.insert (std::pair<float,string>(-25.0f, "-5"));
 811                                         points.insert (std::pair<float,string>(-27.0f, "-7"));
 812                                         points.insert (std::pair<float,string>(-30.0f, "-10"));
 813                                         points.insert (std::pair<float,string>(-40.0f, "-20"));
 814                                         break;
 815                         }
 816                         break;
 817                 case DataType::MIDI:
 818                         layout->set_attributes (midi_font_attributes);
 819                         if (types.size() == 1) {
 820                                 points.insert (std::pair<float,string>(  0, "0"));
 821                                 points.insert (std::pair<float,string>( 16,  "16"));
 822                                 points.insert (std::pair<float,string>( 32,  "32"));
 823                                 points.insert (std::pair<float,string>( 48,  "48"));
 824                                 points.insert (std::pair<float,string>( 64,  "64"));
 825                                 points.insert (std::pair<float,string>( 80,  "80"));
 826                                 points.insert (std::pair<float,string>( 96,  "96"));
 827                                 points.insert (std::pair<float,string>(100, "100"));
 828                                 points.insert (std::pair<float,string>(112, "112"));
 829                         } else {
 830                                 switch (overlay_midi) {
 831                                         case 1:
 832                                                 /* labels that don't overlay with dBFS */
 833                                                 points.insert (std::pair<float,string>(  0, "0"));
 834                                                 points.insert (std::pair<float,string>( 24, "24"));
 835                                                 points.insert (std::pair<float,string>( 48, "48"));
 836                                                 points.insert (std::pair<float,string>( 72, "72"));
 837                                                 points.insert (std::pair<float,string>(127, "127"));
 838                                                 break;
 839                                         case 2:
 840                                                 /* labels that don't overlay with DIN */
 841                                                 points.insert (std::pair<float,string>(  0, "0"));
 842                                                 points.insert (std::pair<float,string>( 16,  "16"));
 843                                                 points.insert (std::pair<float,string>( 40,  "40"));
 844                                                 points.insert (std::pair<float,string>( 64,  "64"));
 845                                                 points.insert (std::pair<float,string>(112, "112"));
 846                                                 points.insert (std::pair<float,string>(127, "127"));
 847                                                 break;
 848                                         case 3:
 849                                                 /* labels that don't overlay with BBC nor EBU*/
 850                                                 points.insert (std::pair<float,string>(  0, "0"));
 851                                                 points.insert (std::pair<float,string>( 16, "16"));
 852                                                 points.insert (std::pair<float,string>( 56, "56"));
 853                                                 points.insert (std::pair<float,string>( 72, "72"));
 854                                                 points.insert (std::pair<float,string>(112, "112"));
 855                                                 points.insert (std::pair<float,string>(127, "127"));
 856                                         default:
 857                                                 break;
 858                                 }
 859                         }
 860                         break;
 861                 }
 862
 863                 gint pos = -1;
 864
 865                 for (std::map<float,string>::const_iterator j = points.begin(); j != points.end(); ++j) {
 866                         float fraction = 0;
 867                         bool align_center = background; // this is true for meterbridge meters w/ fixed background
 868                         switch (*i) {
 869                                 case DataType::AUDIO:
 870                                         fraction = mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 871
 872                                         pos = height - (gint) floor (height * fraction);
 873                                         pos = max (pos, 1);
 874                                         if (tickleft) {
 875                                                 cairo_move_to(cr, width-1.5, pos + .5);
 876                                                 cairo_line_to(cr, width, pos + .5);
 877                                                 cairo_stroke (cr);
 878                                         } else if (tickright) {
 879                                                 cairo_move_to(cr, 0, pos + .5);
 880                                                 cairo_line_to(cr, 1.5, pos + .5);
 881                                                 cairo_stroke (cr);
 882                                         }
 883                                         break;
 884
 885                                 case DataType::MIDI:
 886                                         align_center = false; // don't bleed into legend
 887                                         fraction = (j->first) / 127.0;
 888                                         pos = 1 + height - (gint) lrintf (height * fraction);
 889                                         pos = min (pos, height);
 890                                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 891                                         if (tickleft) {
 892                                                 cairo_arc(cr, width - 2.0, pos + .5, 1.0, 0, 2 * M_PI);
 893                                                 cairo_fill(cr);
 894                                         } else if (tickright) {
 895                                                 cairo_arc(cr, 3, pos + .5, 1.0, 0, 2 * M_PI);
 896                                                 cairo_fill(cr);
 897                                         }
 898                                         break;
 899                         }
 900
 901                         if (pos < 0) continue;
 902
 903                         layout->set_text(j->second.c_str());
 904
 905                         int tw, th;
 906                         layout->get_pixel_size(tw, th);
 907
 908                         int p = pos - (th / 2) - 1;
 909                         p = min (p, height - th);
 910                         p = max (p, 0);
 911
 912                         if (align_center) {
 913                                 cairo_move_to (cr, (width-tw)/2.0, p);
 914                         } else {
 915                                 cairo_move_to (cr, width-3-tw, p);
 916                         }
 917
 918                         cairo_set_line_width(cr, 0.12);
 919                         cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
 920                         pango_cairo_layout_path(cr, layout->gobj());
 921                         cairo_stroke_preserve (cr);
 922                         cairo_set_line_width(cr, 1.0);
 923
 924                         if ((*i) == DataType::AUDIO) {
 925                                 mtr_col_and_fract(cr, &c, peakcolor, type, j->first);
 926                         } else {
 927                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 928                         }
 929
 930                         pango_cairo_show_layout (cr, layout->gobj());
 931                         cairo_new_path(cr);
 932                 }
 933         }
 934
 935         // add legend
 936         if (types.size() == 1 || overlay_midi == 0) {
 937                 int tw, th;
 938                 layout->set_attributes (unit_font_attributes);
 939                 switch (types.at(0)) {
 940                         case DataType::AUDIO:
 941                                 switch (type) {
 942                                         case MeterK20:
 943                                                 layout->set_text("K20");
 944                                                 break;
 945                                         case MeterK14:
 946                                                 layout->set_text("K14");
 947                                                 break;
 948                                         case MeterK12:
 949                                                 layout->set_text("K12");
 950                                                 break;
 951                                         default:
 952                                         case MeterPeak:
 953                                         case MeterKrms:
 954                                                 layout->set_text("dBFS");
 955                                                 break;
 956                                         case MeterIEC2EBU:
 957                                                 layout->set_text("EBU");
 958                                                 break;
 959                                         case MeterIEC2BBC:
 960                                                 layout->set_text("BBC");
 961                                                 break;
 962                                         case MeterIEC1DIN:
 963                                                 layout->set_text("DIN");
 964                                                 break;
 965                                         case MeterIEC1NOR:
 966                                                 layout->set_text("NOR");
 967                                                 break;
 968                                         case MeterVU:
 969                                                 layout->set_text("VU");
 970                                                 break;
 971                                 }
 972                                 layout->get_pixel_size(tw, th);
 973                                 break;
 974                         case DataType::MIDI:
 975                                 layout->set_text("mid");
 976                                 layout->get_pixel_size(tw, th);
 977                                 break;
 978                 }
 979                 if (!background) {
 980                         c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 981                 }
 982                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 983                 if (tickleft) {
 984                         cairo_move_to (cr, width - 2 - tw, height - th - 0.5);
 985                 } else {
 986                         cairo_move_to (cr, 2, height - th - 0.5);
 987                 }
 988                 pango_cairo_show_layout (cr, layout->gobj());
 989         }
 990
 991         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 992
 993         cairo_destroy (cr);
 994         cairo_surface_destroy (surface);
 995
 996         return pattern;
 997 }
 998
 999 gint
1000 ArdourMeter::meter_expose_ticks (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mta)
1001 {
1002         Glib::RefPtr<Gdk::Window> win (mta->get_window());
1003         cairo_t* cr;
1004
1005         cr = gdk_cairo_create (win->gobj());
1006
1007         /* clip to expose area */
1008
1009         gdk_cairo_rectangle (cr, &ev->area);
1010         cairo_clip (cr);
1011
1012         cairo_pattern_t* pattern;
1013         const MeterMatricsMapKey key (mta->get_name(), type, types_to_bit(types));
1014         MetricPatternMap::iterator i = ticks_patterns.find (key);
1015
1016         if (i == ticks_patterns.end()) {
1017                 pattern = meter_render_ticks (*mta, type, types);
1018                 ticks_patterns[key] = pattern;
1019         } else {
1020                 pattern = i->second;
1021         }
1022
1023         cairo_move_to (cr, 0, 0);
1024         cairo_set_source (cr, pattern);
1025
1026         gint width, height;
1027         win->get_size (width, height);
1028
1029         cairo_rectangle (cr, 0, 0, width, height);
1030         cairo_fill (cr);
1031
1032         cairo_destroy (cr);
1033
1034         return true;
1035 }
1036
1037 gint
1038 ArdourMeter::meter_expose_metrics (GdkEventExpose *ev, MeterType type, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mma)
1039 {
1040         Glib::RefPtr<Gdk::Window> win (mma->get_window());
1041         cairo_t* cr;
1042
1043         cr = gdk_cairo_create (win->gobj());
1044
1045         /* clip to expose area */
1046
1047         gdk_cairo_rectangle (cr, &ev->area);
1048         cairo_clip (cr);
1049
1050         cairo_pattern_t* pattern;
1051         const MeterMatricsMapKey key (mma->get_name(), type, types_to_bit(types));
1052         MetricPatternMap::iterator i = metric_patterns.find (key);
1053
1054         if (i == metric_patterns.end()) {
1055                 pattern = meter_render_metrics (*mma, type, types);
1056                 metric_patterns[key] = pattern;
1057         } else {
1058                 pattern = i->second;
1059         }
1060
1061         cairo_move_to (cr, 0, 0);
1062         cairo_set_source (cr, pattern);
1063
1064         gint width, height;
1065         win->get_size (width, height);
1066
1067         cairo_rectangle (cr, 0, 0, width, height);
1068         cairo_fill (cr);
1069
1070         cairo_destroy (cr);
1071
1072         return true;
1073 }
1074
1075 void
1076 ArdourMeter::meter_clear_pattern_cache(int which) {
1077         MetricPatternMap::iterator i = metric_patterns.begin();
1078         MetricPatternMap::iterator j = ticks_patterns.begin();
1079
1080         while (i != metric_patterns.end()) {
1081                 int m = 4;
1082                 MeterMatricsMapKey const * const key = &(i->first);
1083                 std::string n = key->_n;
1084                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1085                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1086                 if (which & m) {
1087                         cairo_pattern_destroy(i->second);
1088                         metric_patterns.erase(i++);
1089                 } else {
1090                         ++i;
1091                 }
1092         }
1093
1094         while (j != ticks_patterns.end()) {
1095                 int m = 4;
1096                 MeterMatricsMapKey const * const key = &(j->first);
1097                 std::string n = key->_n;
1098                 if (n.substr(n.length() - 4) == "Left")  { m = 1; }
1099                 if (n.substr(n.length() - 5) == "Right") { m = 2; }
1100                 if (which & m) {
1101                         cairo_pattern_destroy(j->second);
1102                         ticks_patterns.erase(j++);
1103                 } else {
1104                         ++j;
1105                 }
1106         }
1107         RedrawMetrics();
1108 }