apps/gui/skin_engine/skin_render.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id: skin_parser.c 26752 2010-06-10 21:22:16Z bieber $
   9  *
  10  * Copyright (C) 2010 Jonathan Gordon
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <stdbool.h>
  26 #include <ctype.h>
  27 #include "strlcat.h"
  28
  29 #include "config.h"
  30 #include "kernel.h"
  31 #ifdef HAVE_ALBUMART
  32 #include "albumart.h"
  33 #endif
  34 #include "skin_display.h"
  35 #include "skin_engine.h"
  36 #include "skin_parser.h"
  37 #include "tag_table.h"
  38 #include "skin_scan.h"
  39 #if CONFIG_TUNER
  40 #include "radio.h"
  41 #endif
  42 #include "viewport.h"
  43 #include "cuesheet.h"
  44 #include "language.h"
  45 #include "playback.h"
  46 #include "playlist.h"
  47 #include "root_menu.h"
  48 #include "misc.h"
  49
  50
  51 #define MAX_LINE 1024
  52
  53 struct skin_draw_info {
  54     struct gui_wps *gwps;
  55     struct skin_viewport *skin_vp;
  56     int line_number;
  57     unsigned long refresh_type;
  58
  59     char* cur_align_start;
  60     struct align_pos align;
  61     bool no_line_break;
  62     bool line_scrolls;
  63     bool force_redraw;
  64
  65     char *buf;
  66     size_t buf_size;
  67
  68     int offset; /* used by the playlist viewer */
  69 };
  70
  71 typedef bool (*skin_render_func)(struct skin_element* alternator, struct skin_draw_info *info);
  72 bool skin_render_alternator(struct skin_element* alternator, struct skin_draw_info *info);
  73
  74 #ifdef HAVE_LCD_BITMAP
  75 static void skin_render_playlistviewer(struct playlistviewer* viewer,
  76                                        struct gui_wps *gwps,
  77                                        struct skin_viewport* skin_viewport,
  78                                        unsigned long refresh_type);
  79 #endif
  80
  81 static __attribute__((noinline))  bool do_non_text_tags(struct gui_wps *gwps, struct skin_draw_info *info,
  82                              struct skin_element *element, struct viewport* vp)
  83 {
  84 #ifndef HAVE_LCD_BITMAP
  85     (void)vp; /* silence warnings */
  86 #endif
  87     struct wps_token *token = (struct wps_token *)element->data;
  88     struct wps_data *data = gwps->data;
  89     bool do_refresh = (element->tag->flags & info->refresh_type) > 0;
  90     switch (token->type)
  91     {
  92 #if (LCD_DEPTH > 1) || (defined(HAVE_REMOTE_LCD) && (LCD_REMOTE_DEPTH > 1))
  93         case SKIN_TOKEN_VIEWPORT_FGCOLOUR:
  94         {
  95             struct viewport_colour *col = token->value.data;
  96             col->vp->fg_pattern = col->colour;
  97         }
  98         break;
  99         case SKIN_TOKEN_VIEWPORT_BGCOLOUR:
 100         {
 101             struct viewport_colour *col = token->value.data;
 102             col->vp->bg_pattern = col->colour;
 103         }
 104         break;
 105 #endif
 106         case SKIN_TOKEN_VIEWPORT_ENABLE:
 107         {
 108             char *label = token->value.data;
 109             char temp = VP_DRAW_HIDEABLE;
 110             struct skin_element *viewport = gwps->data->tree;
 111             while (viewport)
 112             {
 113                 struct skin_viewport *skinvp = (struct skin_viewport*)viewport->data;
 114                 if (skinvp->label && !skinvp->is_infovp &&
 115                     !strcmp(skinvp->label, label))
 116                 {
 117                     if (skinvp->hidden_flags&VP_DRAW_HIDDEN)
 118                     {
 119                         temp |= VP_DRAW_WASHIDDEN;
 120                     }
 121                     skinvp->hidden_flags = temp;
 122                 }
 123                 viewport = viewport->next;
 124             }
 125         }
 126         break;
 127 #ifdef HAVE_LCD_BITMAP
 128         case SKIN_TOKEN_UIVIEWPORT_ENABLE:
 129             sb_set_info_vp(gwps->display->screen_type,
 130                            token->value.data);
 131             break;
 132         case SKIN_TOKEN_PEAKMETER:
 133             data->peak_meter_enabled = true;
 134             if (do_refresh)
 135                 draw_peakmeters(gwps, info->line_number, vp);
 136             break;
 137 #endif
 138         case SKIN_TOKEN_VOLUMEBAR:
 139         case SKIN_TOKEN_BATTERY_PERCENTBAR:
 140         case SKIN_TOKEN_PROGRESSBAR:
 141         {
 142 #ifdef HAVE_LCD_BITMAP
 143             struct progressbar *bar = (struct progressbar*)token->value.data;
 144             if (do_refresh)
 145                 draw_progressbar(gwps, info->line_number, bar);
 146 #else /* HAVE_LCD_CHARCELL */
 147             if (do_refresh)
 148             {
 149                 if (data->full_line_progressbar)
 150                     draw_player_fullbar(gwps, info->buf, info->buf_size);
 151                 else
 152                     draw_player_progress(gwps);
 153             }
 154 #endif
 155         }
 156         break;
 157 #ifdef HAVE_LCD_BITMAP
 158         case SKIN_TOKEN_IMAGE_DISPLAY_LISTICON:
 159         case SKIN_TOKEN_IMAGE_PRELOAD_DISPLAY:
 160         {
 161             struct image_display *id = token->value.data;
 162             const char* label = id->label;
 163             struct gui_img *img = find_image(label, data);
 164             if (img && img->loaded)
 165             {
 166                 if (id->token == NULL)
 167                 {
 168                     img->display = id->subimage;
 169                 }
 170                 else
 171                 {
 172                     char buf[16];
 173                     const char *out;
 174                     int a = img->num_subimages;
 175                     out = get_token_value(gwps, id->token, info->offset,
 176                                           buf, sizeof(buf), &a);
 177
 178                     /* NOTE: get_token_value() returns values starting at 1! */
 179                     if (a == -1)
 180                         a = (out && *out) ? 1 : 2;
 181                     if (token->type == SKIN_TOKEN_IMAGE_DISPLAY_LISTICON)
 182                         a -= 2; /* 2 is added in statusbar-skinned.c! */
 183                     else
 184                         a--;
 185                     a += id->offset;
 186
 187                     /* Clear the image, as in conditionals */
 188                     clear_image_pos(gwps, img);
 189
 190                     /* If the token returned a value which is higher than
 191                      * the amount of subimages, don't draw it. */
 192                     if (a >= 0 && a < img->num_subimages)
 193                     {
 194                         img->display = a;
 195                     }
 196                 }
 197             }
 198             break;
 199         }
 200 #ifdef HAVE_ALBUMART
 201         case SKIN_TOKEN_ALBUMART_DISPLAY:
 202             /* now draw the AA */
 203             if (do_refresh && data->albumart)
 204             {
 205                 int handle = playback_current_aa_hid(data->playback_aa_slot);
 206 #if CONFIG_TUNER
 207                 if (in_radio_screen() || (get_radio_status() != FMRADIO_OFF))
 208                 {
 209                     struct dim dim = {data->albumart->width, data->albumart->height};
 210                     handle = radio_get_art_hid(&dim);
 211                 }
 212 #endif
 213                 data->albumart->draw_handle = handle;
 214             }
 215             break;
 216 #endif
 217         case SKIN_TOKEN_DRAW_INBUILTBAR:
 218             gui_statusbar_draw(&(statusbars.statusbars[gwps->display->screen_type]),
 219                                info->refresh_type == SKIN_REFRESH_ALL,
 220                                token->value.data);
 221             break;
 222         case SKIN_TOKEN_VIEWPORT_CUSTOMLIST:
 223             if (do_refresh)
 224                 skin_render_playlistviewer(token->value.data, gwps,
 225                                            info->skin_vp, info->refresh_type);
 226             break;
 227
 228 #endif /* HAVE_LCD_BITMAP */
 229         default:
 230             return false;
 231     }
 232     return true;
 233 }
 234
 235
 236
 237 static __attribute__((noinline))  void do_tags_in_hidden_conditional(struct skin_element* branch,
 238                                           struct skin_draw_info *info)
 239 {
 240 #ifdef HAVE_LCD_BITMAP
 241     struct gui_wps *gwps = info->gwps;
 242     struct wps_data *data = gwps->data;
 243 #endif
 244     /* Tags here are ones which need to be "turned off" or cleared
 245      * if they are in a conditional branch which isnt being used */
 246     if (branch->type == LINE_ALTERNATOR)
 247     {
 248         int i;
 249         for (i=0; i<branch->children_count; i++)
 250         {
 251             do_tags_in_hidden_conditional(branch->children[i], info);
 252         }
 253     }
 254     else if (branch->type == LINE && branch->children_count)
 255     {
 256         struct skin_element *child = branch->children[0];
 257         struct wps_token *token;
 258         while (child)
 259         {
 260             if (child->type == CONDITIONAL)
 261             {
 262                 int i;
 263                 for (i=0; i<child->children_count; i++)
 264                 {
 265                     do_tags_in_hidden_conditional(child->children[i], info);
 266                 }
 267                 child = child->next;
 268                 continue;
 269             }
 270             else if (child->type != TAG || !child->data)
 271             {
 272                 child = child->next;
 273                 continue;
 274             }
 275             token = (struct wps_token *)child->data;
 276 #ifdef HAVE_LCD_BITMAP
 277             /* clear all pictures in the conditional and nested ones */
 278             if (token->type == SKIN_TOKEN_IMAGE_PRELOAD_DISPLAY)
 279             {
 280                 struct image_display *id = token->value.data;
 281                 struct gui_img *img = find_image(id->label, data);
 282                 clear_image_pos(gwps, img);
 283             }
 284             else if (token->type == SKIN_TOKEN_PEAKMETER)
 285             {
 286                 data->peak_meter_enabled = false;
 287             }
 288             else if (token->type == SKIN_TOKEN_VIEWPORT_ENABLE)
 289             {
 290                 char *label = token->value.data;
 291                 struct skin_element *viewport;
 292                 for (viewport = data->tree;
 293                      viewport;
 294                      viewport = viewport->next)
 295                 {
 296                     struct skin_viewport *skin_viewport = (struct skin_viewport*)viewport->data;
 297                     if (skin_viewport->label && strcmp(skin_viewport->label, label))
 298                         continue;
 299                     if (skin_viewport->hidden_flags&VP_NEVER_VISIBLE)
 300                     {
 301                         continue;
 302                     }
 303                     if (skin_viewport->hidden_flags&VP_DRAW_HIDEABLE)
 304                     {
 305                         if (skin_viewport->hidden_flags&VP_DRAW_HIDDEN)
 306                             skin_viewport->hidden_flags |= VP_DRAW_WASHIDDEN;
 307                         else
 308                         {
 309                             gwps->display->set_viewport(&skin_viewport->vp);
 310                             gwps->display->clear_viewport();
 311                             gwps->display->scroll_stop(&skin_viewport->vp);
 312                             gwps->display->set_viewport(&info->skin_vp->vp);
 313                             skin_viewport->hidden_flags |= VP_DRAW_HIDDEN;
 314                         }
 315                     }
 316                 }
 317             }
 318 #endif
 319 #ifdef HAVE_ALBUMART
 320             else if (data->albumart && token->type == SKIN_TOKEN_ALBUMART_DISPLAY)
 321             {
 322                 draw_album_art(gwps,
 323                         playback_current_aa_hid(data->playback_aa_slot), true);
 324             }
 325 #endif
 326             child = child->next;
 327         }
 328     }
 329 }
 330
 331 static __attribute__((noinline))  void fix_line_alignment(struct skin_draw_info *info, struct skin_element *element)
 332 {
 333     struct align_pos *align = &info->align;
 334     char *cur_pos = info->cur_align_start + strlen(info->cur_align_start);
 335     switch (element->tag->type)
 336     {
 337         case SKIN_TOKEN_ALIGN_LEFT:
 338             *cur_pos = '\0'; cur_pos++; *cur_pos = '\0';
 339             align->left = cur_pos;
 340             info->cur_align_start = cur_pos;
 341             break;
 342         case SKIN_TOKEN_ALIGN_LEFT_RTL:
 343             *cur_pos = '\0'; cur_pos++; *cur_pos = '\0';
 344             if (lang_is_rtl())
 345                 align->right = cur_pos;
 346             else
 347                 align->left = cur_pos;
 348             info->cur_align_start = cur_pos;
 349             break;
 350         case SKIN_TOKEN_ALIGN_CENTER:
 351             *cur_pos = '\0'; cur_pos++; *cur_pos = '\0';
 352             align->center = cur_pos;
 353             info->cur_align_start = cur_pos;
 354             break;
 355         case SKIN_TOKEN_ALIGN_RIGHT:
 356             *cur_pos = '\0'; cur_pos++; *cur_pos = '\0';
 357             align->right = cur_pos;
 358             info->cur_align_start = cur_pos;
 359             break;
 360         case SKIN_TOKEN_ALIGN_RIGHT_RTL:
 361             *cur_pos = '\0'; cur_pos++; *cur_pos = '\0';
 362             if (lang_is_rtl())
 363                 align->left = cur_pos;
 364             else
 365                 align->right = cur_pos;
 366             info->cur_align_start = cur_pos;
 367             break;
 368         default:
 369             break;
 370     }
 371 }
 372
 373 /* Draw a LINE element onto the display */
 374 static __attribute__((noinline))  bool skin_render_line(struct skin_element* line, struct skin_draw_info *info)
 375 {
 376     bool needs_update = false;
 377     int last_value, value;
 378
 379     if (line->children_count == 0)
 380         return false; /* empty line, do nothing */
 381
 382     struct skin_element *child = line->children[0];
 383     struct conditional *conditional;
 384     skin_render_func func = skin_render_line;
 385     int old_refresh_mode = info->refresh_type;
 386     while (child)
 387     {
 388         switch (child->type)
 389         {
 390             case CONDITIONAL:
 391                 conditional = (struct conditional*)child->data;
 392                 last_value = conditional->last_value;
 393                 value = evaluate_conditional(info->gwps, info->offset,
 394                                              conditional, child->children_count);
 395                 conditional->last_value = value;
 396                 if (child->children_count == 1)
 397                 {
 398                     /* special handling so
 399                      * %?aa<true> and %?<true|false> need special handlng here */
 400
 401                     if (value == -1) /* tag is false */
 402                     {
 403                         /* we are in a false branch of a %?aa<true> conditional */
 404                         if (last_value == 0)
 405                             do_tags_in_hidden_conditional(child->children[0], info);
 406                         break;
 407                     }
 408                 }
 409                 else
 410                 {
 411                     if (last_value >= 0 && value != last_value && last_value < child->children_count)
 412                         do_tags_in_hidden_conditional(child->children[last_value], info);
 413                 }
 414                 if (child->children[value]->type == LINE_ALTERNATOR)
 415                 {
 416                     func = skin_render_alternator;
 417                 }
 418                 else if (child->children[value]->type == LINE)
 419                     func = skin_render_line;
 420
 421                 if (value != last_value)
 422                 {
 423                     info->refresh_type = SKIN_REFRESH_ALL;
 424                     info->force_redraw = true;
 425                 }
 426
 427                 if (func(child->children[value], info))
 428                     needs_update = true;
 429                 else
 430                     needs_update = needs_update || (last_value != value);
 431
 432                 info->refresh_type = old_refresh_mode;
 433                 break;
 434             case TAG:
 435                 if (child->tag->flags & NOBREAK)
 436                     info->no_line_break = true;
 437                 if (child->tag->type == SKIN_TOKEN_SUBLINE_SCROLL)
 438                     info->line_scrolls = true;
 439
 440                 fix_line_alignment(info, child);
 441
 442                 if (!child->data)
 443                 {
 444                     break;
 445                 }
 446                 if (!do_non_text_tags(info->gwps, info, child, &info->skin_vp->vp))
 447                 {
 448                     static char tempbuf[128];
 449                     const char *value = get_token_value(info->gwps, child->data,
 450                                                         info->offset, tempbuf,
 451                                                         sizeof(tempbuf), NULL);
 452                     if (value)
 453                     {
 454 #if CONFIG_RTC
 455                         if (child->tag->flags&SKIN_RTC_REFRESH)
 456                             needs_update = needs_update || info->refresh_type&SKIN_REFRESH_DYNAMIC;
 457 #endif
 458                         needs_update = needs_update ||
 459                                 ((child->tag->flags&info->refresh_type)!=0);
 460                         strlcat(info->cur_align_start, value,
 461                                 info->buf_size - (info->cur_align_start-info->buf));
 462                     }
 463                 }
 464                 break;
 465             case TEXT:
 466                 strlcat(info->cur_align_start, child->data,
 467                         info->buf_size - (info->cur_align_start-info->buf));
 468                 needs_update = needs_update ||
 469                                 (info->refresh_type&SKIN_REFRESH_STATIC) != 0;
 470                 break;
 471             case COMMENT:
 472             default:
 473                 break;
 474         }
 475
 476         child = child->next;
 477     }
 478     return needs_update;
 479 }
 480
 481 static __attribute__((noinline))  int get_subline_timeout(struct gui_wps *gwps, struct skin_element* line)
 482 {
 483     struct skin_element *element=line;
 484     struct wps_token *token;
 485     int retval = DEFAULT_SUBLINE_TIME_MULTIPLIER*TIMEOUT_UNIT;
 486     if (element->type == LINE)
 487     {
 488         if (element->children_count == 0)
 489             return retval; /* empty line, so force redraw */
 490         element = element->children[0];
 491     }
 492     while (element)
 493     {
 494         if (element->type == TAG &&
 495             element->tag->type == SKIN_TOKEN_SUBLINE_TIMEOUT )
 496         {
 497             token = element->data;
 498             return token->value.i;
 499         }
 500         else if (element->type == CONDITIONAL)
 501         {
 502             struct conditional *conditional = element->data;
 503             int val = evaluate_conditional(gwps, 0, conditional,
 504                                            element->children_count);
 505             if (val >= 0)
 506             {
 507                 retval = get_subline_timeout(gwps, element->children[val]);
 508                 if (retval >= 0)
 509                     return retval;
 510             }
 511         }
 512         element = element->next;
 513     }
 514     return retval;
 515 }
 516
 517 bool __attribute__((noinline))  skin_render_alternator(struct skin_element* element, struct skin_draw_info *info)
 518 {
 519     bool changed_lines = false;
 520     struct line_alternator *alternator = (struct line_alternator*)element->data;
 521     unsigned old_refresh = info->refresh_type;
 522     if (info->refresh_type == SKIN_REFRESH_ALL)
 523     {
 524         alternator->current_line = element->children_count-1;
 525         changed_lines = true;
 526     }
 527     else if (TIME_AFTER(current_tick, alternator->next_change_tick))
 528     {
 529         changed_lines = true;
 530     }
 531
 532     if (changed_lines)
 533     {
 534         struct skin_element *current_line = element->children[alternator->current_line];
 535         int start = alternator->current_line;
 536         int try_line = start;
 537         bool suitable = false;
 538         int rettimeout = DEFAULT_SUBLINE_TIME_MULTIPLIER*TIMEOUT_UNIT;
 539
 540         /* find a subline which has at least one token in it,
 541          * and that line doesnt have a timeout set to 0 through conditionals */
 542         do {
 543             try_line++;
 544             if (try_line >= element->children_count)
 545                 try_line = 0;
 546             if (element->children[try_line]->children_count != 0)
 547             {
 548                 current_line = element->children[try_line];
 549                 rettimeout = get_subline_timeout(info->gwps,
 550                                                  current_line->children[0]);
 551                 if (rettimeout > 0)
 552                 {
 553                     suitable = true;
 554                 }
 555             }
 556         }
 557         while (try_line != start && !suitable);
 558
 559         if (suitable)
 560         {
 561             alternator->current_line = try_line;
 562             alternator->next_change_tick = current_tick + rettimeout;
 563         }
 564
 565         info->refresh_type = SKIN_REFRESH_ALL;
 566         info->force_redraw = true;
 567     }
 568     bool ret = skin_render_line(element->children[alternator->current_line], info);
 569     info->refresh_type = old_refresh;
 570     return changed_lines || ret;
 571 }
 572
 573 static __attribute__((noinline))  void skin_render_viewport(struct skin_element* viewport, struct gui_wps *gwps,
 574                                  struct skin_viewport* skin_viewport, unsigned long refresh_type)
 575 {
 576     struct screen *display = gwps->display;
 577     char linebuf[MAX_LINE];
 578     skin_render_func func = skin_render_line;
 579     struct skin_element* line = viewport;
 580     struct skin_draw_info info = {
 581         .gwps = gwps,
 582         .buf = linebuf,
 583         .buf_size = sizeof(linebuf),
 584         .line_number = 0,
 585         .no_line_break = false,
 586         .line_scrolls = false,
 587         .refresh_type = refresh_type,
 588         .skin_vp = skin_viewport,
 589         .offset = 0
 590     };
 591
 592     struct align_pos * align = &info.align;
 593     bool needs_update;
 594 #ifdef HAVE_LCD_BITMAP
 595     /* Set images to not to be displayed */
 596     struct skin_token_list *imglist = gwps->data->images;
 597     while (imglist)
 598     {
 599         struct gui_img *img = (struct gui_img *)imglist->token->value.data;
 600         img->display = -1;
 601         imglist = imglist->next;
 602     }
 603 #endif
 604
 605     while (line)
 606     {
 607         linebuf[0] = '\0';
 608         info.no_line_break = false;
 609         info.line_scrolls = false;
 610         info.force_redraw = false;
 611
 612         info.cur_align_start = info.buf;
 613         align->left = info.buf;
 614         align->center = NULL;
 615         align->right = NULL;
 616
 617
 618         if (line->type == LINE_ALTERNATOR)
 619             func = skin_render_alternator;
 620         else if (line->type == LINE)
 621             func = skin_render_line;
 622
 623         needs_update = func(line, &info);
 624
 625         /* only update if the line needs to be, and there is something to write */
 626         if (refresh_type && needs_update)
 627         {
 628             if (info.line_scrolls)
 629             {
 630                 /* if the line is a scrolling one we don't want to update
 631                    too often, so that it has the time to scroll */
 632                 if ((refresh_type & SKIN_REFRESH_SCROLL) || info.force_redraw)
 633                     write_line(display, align, info.line_number, true);
 634             }
 635             else
 636                 write_line(display, align, info.line_number, false);
 637         }
 638         if (!info.no_line_break)
 639             info.line_number++;
 640         line = line->next;
 641     }
 642 #ifdef HAVE_LCD_BITMAP
 643     wps_display_images(gwps, &skin_viewport->vp);
 644 #endif
 645 }
 646
 647 void skin_render(struct gui_wps *gwps, unsigned refresh_mode)
 648 {
 649     struct wps_data *data = gwps->data;
 650     struct screen *display = gwps->display;
 651
 652     struct skin_element* viewport = data->tree;
 653     struct skin_viewport* skin_viewport;
 654
 655     int old_refresh_mode = refresh_mode;
 656
 657 #ifdef HAVE_LCD_CHARCELLS
 658     int i;
 659     for (i = 0; i < 8; i++)
 660     {
 661         if (data->wps_progress_pat[i] == 0)
 662             data->wps_progress_pat[i] = display->get_locked_pattern();
 663     }
 664 #endif
 665     viewport = data->tree;
 666     skin_viewport = (struct skin_viewport *)viewport->data;
 667     if (skin_viewport->label && viewport->next &&
 668         !strcmp(skin_viewport->label,VP_DEFAULT_LABEL))
 669         refresh_mode = 0;
 670
 671     for (viewport = data->tree;
 672          viewport;
 673          viewport = viewport->next)
 674     {
 675         /* SETUP */
 676         skin_viewport = (struct skin_viewport*)viewport->data;
 677         unsigned vp_refresh_mode = refresh_mode;
 678 #if (LCD_DEPTH > 1) || (defined(HAVE_REMOTE_LCD) && LCD_REMOTE_DEPTH > 1)
 679         skin_viewport->vp.fg_pattern = skin_viewport->start_fgcolour;
 680         skin_viewport->vp.bg_pattern = skin_viewport->start_bgcolour;
 681 #endif
 682
 683         /* dont redraw the viewport if its disabled */
 684         if (skin_viewport->hidden_flags&VP_NEVER_VISIBLE)
 685         {   /* don't draw anything into this one */
 686             vp_refresh_mode = 0;
 687         }
 688         else if ((skin_viewport->hidden_flags&VP_DRAW_HIDDEN))
 689         {
 690             skin_viewport->hidden_flags |= VP_DRAW_WASHIDDEN;
 691             continue;
 692         }
 693         else if (((skin_viewport->hidden_flags&
 694                    (VP_DRAW_WASHIDDEN|VP_DRAW_HIDEABLE))
 695                     == (VP_DRAW_WASHIDDEN|VP_DRAW_HIDEABLE)))
 696         {
 697             vp_refresh_mode = SKIN_REFRESH_ALL;
 698             skin_viewport->hidden_flags = VP_DRAW_HIDEABLE;
 699         }
 700
 701         display->set_viewport(&skin_viewport->vp);
 702         if ((vp_refresh_mode&SKIN_REFRESH_ALL) == SKIN_REFRESH_ALL)
 703         {
 704             display->clear_viewport();
 705         }
 706         /* render */
 707         skin_render_viewport(viewport->children[0], gwps,
 708                              skin_viewport, vp_refresh_mode);
 709         refresh_mode = old_refresh_mode;
 710     }
 711
 712     /* Restore the default viewport */
 713     display->set_viewport(NULL);
 714     display->update();
 715 }
 716
 717 #ifdef HAVE_LCD_BITMAP
 718 static __attribute__((noinline))  void skin_render_playlistviewer(struct playlistviewer* viewer,
 719                                        struct gui_wps *gwps,
 720                                        struct skin_viewport* skin_viewport,
 721                                        unsigned long refresh_type)
 722 {
 723     struct screen *display = gwps->display;
 724     char linebuf[MAX_LINE];
 725     skin_render_func func = skin_render_line;
 726     struct skin_element* line;
 727     struct skin_draw_info info = {
 728         .gwps = gwps,
 729         .buf = linebuf,
 730         .buf_size = sizeof(linebuf),
 731         .line_number = 0,
 732         .no_line_break = false,
 733         .line_scrolls = false,
 734         .refresh_type = refresh_type,
 735         .skin_vp = skin_viewport,
 736         .offset = viewer->start_offset
 737     };
 738
 739     struct align_pos * align = &info.align;
 740     bool needs_update;
 741     int cur_pos, start_item, max;
 742     int nb_lines = viewport_get_nb_lines(viewer->vp);
 743 #if CONFIG_TUNER
 744     if (current_screen() == GO_TO_FM)
 745     {
 746         cur_pos = radio_current_preset();
 747         start_item = cur_pos + viewer->start_offset;
 748         max = start_item+radio_preset_count();
 749     }
 750     else
 751 #endif
 752     {
 753         struct cuesheet *cue = skin_get_global_state()->id3 ?
 754                                skin_get_global_state()->id3->cuesheet : NULL;
 755         cur_pos = playlist_get_display_index();
 756         max = playlist_amount()+1;
 757         if (cue)
 758             max += cue->track_count;
 759         start_item = MAX(0, cur_pos + viewer->start_offset);
 760     }
 761     if (max-start_item > nb_lines)
 762         max = start_item + nb_lines;
 763
 764     line = viewer->line;
 765     while (start_item < max)
 766     {
 767         linebuf[0] = '\0';
 768         info.no_line_break = false;
 769         info.line_scrolls = false;
 770         info.force_redraw = false;
 771
 772         info.cur_align_start = info.buf;
 773         align->left = info.buf;
 774         align->center = NULL;
 775         align->right = NULL;
 776
 777
 778         if (line->type == LINE_ALTERNATOR)
 779             func = skin_render_alternator;
 780         else if (line->type == LINE)
 781             func = skin_render_line;
 782
 783         needs_update = func(line, &info);
 784
 785         /* only update if the line needs to be, and there is something to write */
 786         if (refresh_type && needs_update)
 787         {
 788             if (info.line_scrolls)
 789             {
 790                 /* if the line is a scrolling one we don't want to update
 791                    too often, so that it has the time to scroll */
 792                 if ((refresh_type & SKIN_REFRESH_SCROLL) || info.force_redraw)
 793                     write_line(display, align, info.line_number, true);
 794             }
 795             else
 796                 write_line(display, align, info.line_number, false);
 797         }
 798         info.line_number++;
 799         info.offset++;
 800         start_item++;
 801     }
 802 }
 803 #endif