lib/gui/ewidgetdesktop.cpp

   1 #include <lib/gui/ewidgetdesktop.h>
   2 #include <lib/gui/ewidget.h>
   3 #include <lib/base/ebase.h>
   4 #include <lib/gdi/grc.h>
   5
   6 extern void dumpRegion(const gRegion &region);
   7
   8 void eWidgetDesktop::addRootWidget(eWidget *root)
   9 {
  10         ASSERT(!root->m_desktop);
  11
  12         int invert_sense = 0;
  13                 /* buffered mode paints back-to-front, while immediate mode is front-to-back. */
  14         if (m_comp_mode == cmBuffered)
  15                 invert_sense = 1;
  16
  17         ePtrList<eWidget>::iterator insert_position = m_root.begin();
  18
  19         for (;;)
  20         {
  21                 if ((insert_position == m_root.end()) || (invert_sense ^ (insert_position->m_z_position < root->m_z_position)))
  22                 {
  23                         m_root.insert(insert_position, root);
  24                         break;
  25                 }
  26                 ++insert_position;
  27         }
  28
  29         root->m_desktop = this;
  30
  31                 /* the creation will be postponed. */
  32         for (int i = 0; i < MAX_LAYER; ++i)
  33                 root->m_comp_buffer[i] = 0;
  34 }
  35
  36 void eWidgetDesktop::removeRootWidget(eWidget *root)
  37 {
  38         if (m_comp_mode == cmBuffered)
  39         {
  40                 for (int i = 0; i < MAX_LAYER; ++i)
  41                         removeBufferForWidget(root, i);
  42         }
  43
  44         m_root.remove(root);
  45 }
  46
  47 int eWidgetDesktop::movedWidget(eWidget *root)
  48 {
  49         if (m_comp_mode != cmBuffered)
  50                 return -1; /* native move not supported */
  51
  52         for (int i = 0; i < MAX_LAYER; ++i)
  53         {
  54                 if (root->m_comp_buffer[i])
  55                         root->m_comp_buffer[i]->m_position = root->position();
  56 //              redrawComposition(0);
  57         }
  58
  59         return 0; /* native move ok */
  60 }
  61
  62 void eWidgetDesktop::calcWidgetClipRegion(eWidget *widget, gRegion &parent_visible)
  63 {
  64                 /* start with our clip region, clipped with the parent's */
  65         if (widget->m_vis & eWidget::wVisShow)
  66         {
  67                 widget->m_visible_region = widget->m_clip_region;
  68                 widget->m_visible_region.moveBy(widget->position());
  69                 widget->m_visible_region &= parent_visible; // in parent space!
  70
  71                 if (!widget->isTransparent())
  72                                 /* remove everything this widget will contain from parent's visible list, unless widget is transparent. */
  73                         parent_visible -= widget->m_visible_region; // will remove child regions too!
  74
  75                         /* now prepare for recursing to childs */
  76                 widget->m_visible_region.moveBy(-widget->position());            // now in local space
  77         } else
  78                 widget->m_visible_region = gRegion();
  79
  80         widget->m_visible_with_childs = widget->m_visible_region;
  81
  82                         /* add childs in reverse (Z) order - we're going from front-to-bottom here. */
  83         ePtrList<eWidget>::iterator i(widget->m_childs.end());
  84
  85         for (;;)
  86         {
  87                 if (i != widget->m_childs.end())
  88                 {
  89                         if (i->m_vis & eWidget::wVisShow)
  90                                 calcWidgetClipRegion(*i, widget->m_visible_region);
  91                         else
  92                                 clearVisibility(*i);
  93                 }
  94                 if (i == widget->m_childs.begin())
  95                         break;
  96                 --i;
  97         }
  98 }
  99
 100 void eWidgetDesktop::recalcClipRegions(eWidget *root)
 101 {
 102         if (m_comp_mode == cmImmediate)
 103         {
 104                 gRegion background_before = m_screen.m_background_region;
 105
 106                 m_screen.m_background_region = gRegion(eRect(ePoint(0, 0), m_screen.m_screen_size));
 107
 108                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 109                 {
 110                         if (!(i->m_vis & eWidget::wVisShow))
 111                         {
 112                                 clearVisibility(i);
 113                                 continue;
 114                         }
 115
 116                         gRegion visible_before = i->m_visible_with_childs;
 117
 118                         calcWidgetClipRegion(*i, m_screen.m_background_region);
 119
 120                         gRegion redraw = (i->m_visible_with_childs - visible_before) | (visible_before - i->m_visible_with_childs);
 121
 122                         redraw.moveBy(i->position());
 123
 124                         invalidate(redraw);
 125                 }
 126
 127                 gRegion redraw = (background_before - m_screen.m_background_region) | (m_screen.m_background_region - background_before);
 128                 invalidate(redraw);
 129         } else if (m_comp_mode == cmBuffered)
 130         {
 131                 if (!root->m_vis & eWidget::wVisShow)
 132                 {
 133                         clearVisibility(root);
 134                         for (int i = 0; i < MAX_LAYER; ++i)
 135                                 removeBufferForWidget(root, i);
 136                         return;
 137                 }
 138
 139                 for (int i = 0; i < MAX_LAYER; ++i)
 140                 {
 141                         eWidgetDesktopCompBuffer *comp = root->m_comp_buffer[i];
 142
 143                                         /* TODO: layers might not be required to have the screen size, for memory reasons. */
 144                         if ((i == 0 && !comp) || (comp && (root->size() != comp->m_screen_size)))
 145                                 createBufferForWidget(root, 0);
 146
 147                         comp = root->m_comp_buffer[i]; /* it might have changed. */
 148
 149                         if (!comp)
 150                                 continue;  /* WAIT, don't we need to invalidate,whatever */
 151
 152                                         /* CHECKME: don't we need to recalculate everything? after all, our buffer has changed and is likely to be cleared */
 153                         gRegion visible_before = root->m_visible_with_childs;
 154
 155                         comp->m_background_region = gRegion(eRect(comp->m_position, comp->m_screen_size));
 156
 157                         gRegion visible_new = root->m_visible_with_childs - visible_before;
 158                         gRegion visible_lost = visible_before - root->m_visible_with_childs;
 159                         visible_new.moveBy(root->position());
 160                         visible_lost.moveBy(root->position());
 161
 162                         invalidate(visible_new, root, i);
 163                         invalidate(visible_lost, root, i);
 164
 165                         calcWidgetClipRegion(root, comp->m_background_region);
 166                 }
 167         }
 168 }
 169
 170 void eWidgetDesktop::invalidateWidgetLayer(const gRegion &region, const eWidget *widget, int layer)
 171 {
 172         if (m_comp_mode == cmImmediate)
 173         {
 174                 invalidate(region);
 175                 return;
 176         }
 177         eWidgetDesktopCompBuffer *comp = widget->m_comp_buffer[layer];
 178         if (comp)
 179                 comp->m_dirty_region |= region;
 180 }
 181
 182 void eWidgetDesktop::invalidateWidget(const gRegion &region, const eWidget *widget, int layer)
 183 {
 184         if (m_comp_mode == cmImmediate)
 185         {
 186                 invalidate(region);
 187                 return;
 188         }
 189
 190         if (!(widget->m_vis & eWidget::wVisShow))
 191                 return;
 192
 193         gRegion mregion = region;
 194         if (layer == -1)
 195                 for (int layer = 0; layer < MAX_LAYER; ++layer)
 196                         invalidateWidgetLayer(mregion, widget, layer);
 197         else
 198                 invalidateWidgetLayer(mregion, widget, layer);
 199 }
 200
 201 void eWidgetDesktop::invalidate(const gRegion &region, const eWidget *widget, int layer)
 202 {
 203         if (region.empty())
 204                 return;
 205
 206         if (m_timer && !m_require_redraw)
 207                 m_timer->start(0, 1); // start singleshot redraw timer
 208
 209         m_require_redraw = 1;
 210
 211         if (m_comp_mode == cmImmediate)
 212         {
 213                         /* in immediate mode, we don't care for widget and layer, we use the topmost. */
 214                 m_screen.m_dirty_region |= region;
 215         } else
 216         {
 217                 if (!widget)
 218                         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 219                                 invalidateWidget(region, i);
 220                 else
 221                         invalidateWidget(region, widget, layer);
 222         }
 223 }
 224
 225 void eWidgetDesktop::setBackgroundColor(eWidgetDesktopCompBuffer *comp, gRGB col)
 226 {
 227         comp->m_background_color = col;
 228
 229                 /* if there's something visible from the background, redraw it with the new color. */
 230         if (comp->m_dc && comp->m_background_region.valid() && !comp->m_background_region.empty())
 231         {
 232                         /* todo: split out "setBackgroundColor / clear"... maybe? */
 233                 gPainter painter(comp->m_dc);
 234                 painter.resetClip(comp->m_background_region);
 235                 painter.setBackgroundColor(comp->m_background_color);
 236                 painter.clear();
 237         }
 238 }
 239
 240 void eWidgetDesktop::setBackgroundColor(gRGB col)
 241 {
 242         setBackgroundColor(&m_screen, col);
 243
 244         if (m_comp_mode == cmBuffered)
 245                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 246                 {
 247                         for (int l = 0; l < MAX_LAYER; ++l)
 248                                 if (i->m_comp_buffer[l])
 249                                         setBackgroundColor(i->m_comp_buffer[l], l ? gRGB(0, 0, 0, 0) : col); /* all layers above 0 will have a transparent background */
 250                 }
 251 }
 252
 253 void eWidgetDesktop::setPalette(gPixmap &pm)
 254 {
 255 //      if (m_comp_mode == cmImmediate)
 256         {
 257                 ASSERT(m_screen.m_dc);
 258                 gPainter painter(m_screen.m_dc);
 259                 painter.setPalette(&pm);
 260         }
 261
 262         if (m_comp_mode == cmBuffered)
 263         {
 264                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 265                 {
 266                         for (int l = 0; l < MAX_LAYER; ++l)
 267                         {
 268                                 if (!i->m_comp_buffer[l])
 269                                         continue;
 270                                 ASSERT(i->m_comp_buffer[l]->m_dc);
 271                                 gPainter painter(i->m_comp_buffer[l]->m_dc);
 272                                 painter.setPalette(&pm);
 273                         }
 274                 }
 275         }
 276 }
 277
 278 void eWidgetDesktop::paintBackground(eWidgetDesktopCompBuffer *comp)
 279 {
 280         if (!comp)
 281                 return;
 282
 283         comp->m_dirty_region &= comp->m_background_region;
 284
 285         gPainter painter(comp->m_dc);
 286
 287         painter.resetClip(comp->m_dirty_region);
 288         painter.setBackgroundColor(comp->m_background_color);
 289         painter.clear();
 290
 291         comp->m_dirty_region = gRegion();
 292 }
 293
 294
 295 void eWidgetDesktop::paintLayer(eWidget *widget, int layer)
 296 {
 297         eWidgetDesktopCompBuffer *comp = (m_comp_mode == cmImmediate) ? &m_screen : widget->m_comp_buffer[layer];
 298         if (m_comp_mode == cmImmediate)
 299                 ASSERT(layer == 0);
 300         if (!comp)
 301                 return;
 302         gPainter painter(comp->m_dc);
 303         painter.moveOffset(-comp->m_position);
 304         widget->doPaint(painter, comp->m_dirty_region, layer);
 305         painter.resetOffset();
 306 }
 307
 308 void eWidgetDesktop::paint()
 309 {
 310         m_require_redraw = 0;
 311
 312                 /* walk all root windows. */
 313         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 314         {
 315
 316                 if (!(i->m_vis & eWidget::wVisShow))
 317                         continue;
 318
 319                 if (m_comp_mode == cmImmediate)
 320                         paintLayer(i, 0);
 321                 else
 322                         for (int l = 0; l < MAX_LAYER; ++l)
 323                         {
 324                                 paintLayer(i, l);
 325                                 paintBackground(i->m_comp_buffer[l]);
 326                         }
 327         }
 328
 329         if (m_comp_mode == cmImmediate)
 330                 paintBackground(&m_screen);
 331
 332         if (m_comp_mode == cmBuffered)
 333         {
 334 //              redrawComposition(0);
 335         } else
 336         {
 337                 gPainter painter(m_screen.m_dc);
 338                 painter.flush();
 339         }
 340 }
 341
 342 void eWidgetDesktop::setDC(gDC *dc)
 343 {
 344         m_screen.m_dc = dc;
 345         if (m_comp_mode == cmBuffered)
 346                 redrawComposition(1);
 347 }
 348
 349 void eWidgetDesktop::setRedrawTask(eMainloop &ml)
 350 {
 351         if (m_mainloop)
 352         {
 353                 m_timer = 0;
 354                 m_mainloop = 0;
 355         }
 356         m_mainloop = &ml;
 357         m_timer = eTimer::create(m_mainloop);
 358         CONNECT(m_timer->timeout, eWidgetDesktop::paint);
 359
 360         if (m_require_redraw)
 361                 m_timer->start(0, 1);
 362 }
 363
 364 void eWidgetDesktop::makeCompatiblePixmap(ePtr<gPixmap> &pm)
 365 {
 366         makeCompatiblePixmap(*(pm.operator->()));
 367 }
 368
 369 void eWidgetDesktop::makeCompatiblePixmap(gPixmap &pm)
 370 {
 371         if (m_comp_mode != cmImmediate)
 372                 return;
 373
 374 //      eDebug("widgetDesktop: make compatible pixmap of %p", &pm);
 375         if (!m_screen.m_dc)
 376         {
 377                 eWarning("eWidgetDesktop: no DC to make pixmap compatible with!");
 378                 return;
 379         }
 380
 381         ePtr<gPixmap> target_pixmap;
 382         m_screen.m_dc->getPixmap(target_pixmap);
 383
 384         if (!target_pixmap) {
 385                 eDebug("no target pixmap! assuming bpp > 8 for accelerated graphics.");
 386                 return;
 387         }
 388
 389         if (target_pixmap->surface && target_pixmap->surface->bpp > 8)
 390                 return;
 391
 392         ePtr<gDC> pixmap_dc = new gDC(&pm);
 393         gPainter pixmap_painter(pixmap_dc);
 394
 395         pixmap_painter.mergePalette(target_pixmap);
 396 }
 397
 398 void eWidgetDesktop::setCompositionMode(int mode)
 399 {
 400         m_comp_mode = mode;
 401
 402         if (mode == cmBuffered)
 403                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 404                         createBufferForWidget(*i, 0);
 405         else
 406                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 407                         for (int l = 0; l < MAX_LAYER; ++l)
 408                                 removeBufferForWidget(*i, l);
 409 }
 410
 411 eWidgetDesktop::eWidgetDesktop(eSize size): m_mainloop(0)
 412 {
 413         m_screen.m_dirty_region = gRegion(eRect(ePoint(0, 0), size));
 414         m_screen.m_screen_size = size;
 415         m_require_redraw = 0;
 416         m_style_id = 0;
 417
 418         CONNECT(gRC::getInstance()->notify, eWidgetDesktop::notify);
 419         setCompositionMode(cmImmediate);
 420 }
 421
 422 eWidgetDesktop::~eWidgetDesktop()
 423 {
 424                 /* tell registered root windows that they no longer have a desktop. */
 425         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); )
 426         {
 427                 i->m_desktop = 0;
 428                 i = m_root.erase(i);
 429         }
 430                 /* destroy all buffers */
 431         setCompositionMode(-1);
 432 }
 433
 434 void eWidgetDesktop::createBufferForWidget(eWidget *widget, int layer)
 435 {
 436         removeBufferForWidget(widget, layer);
 437
 438         eWidgetDesktopCompBuffer *comp = widget->m_comp_buffer[layer] = new eWidgetDesktopCompBuffer;
 439
 440         eDebug("create buffer for widget layer %d, %d x %d\n", layer, widget->size().width(), widget->size().height());
 441
 442         eRect bbox = eRect(widget->position(), widget->size());
 443         comp->m_position = bbox.topLeft();
 444         comp->m_dirty_region = gRegion(eRect(ePoint(0, 0), bbox.size()));
 445         comp->m_screen_size = bbox.size();
 446                 /* TODO: configurable bit depth. */
 447
 448                 /* clone palette. FIXME. */
 449         ePtr<gPixmap> pm = new gPixmap(comp->m_screen_size, 32, 1), pm_screen;
 450         pm->surface->clut.data = new gRGB[256];
 451         pm->surface->clut.colors = 256;
 452         pm->surface->clut.start = 0;
 453
 454         m_screen.m_dc->getPixmap(pm_screen);
 455
 456         memcpy(pm->surface->clut.data, pm_screen->surface->clut.data, 256 * sizeof(gRGB));
 457
 458         comp->m_dc = new gDC(pm);
 459 }
 460
 461 void eWidgetDesktop::removeBufferForWidget(eWidget *widget, int layer)
 462 {
 463         if (widget->m_comp_buffer[layer])
 464         {
 465                 delete widget->m_comp_buffer[layer];
 466                 widget->m_comp_buffer[layer] = 0;
 467         }
 468 }
 469
 470 void eWidgetDesktop::redrawComposition(int notified)
 471 {
 472         if (m_comp_mode != cmBuffered)
 473                 return;
 474
 475         ASSERT(m_screen.m_dc);
 476
 477         gPainter p(m_screen.m_dc);
 478         p.resetClip(eRect(ePoint(0, 0), m_screen.m_screen_size));
 479         p.setBackgroundColor(m_screen.m_background_color);
 480         p.clear();
 481
 482         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 483         {
 484                 if (!i->isVisible())
 485                         continue;
 486                 for (int layer = 0; layer < MAX_LAYER; ++layer)
 487                 {
 488                         ePtr<gPixmap> pm;
 489                         if (!i->m_comp_buffer[layer])
 490                                 continue;
 491                         i->m_comp_buffer[layer]->m_dc->getPixmap(pm);
 492                         p.blit(pm, i->m_comp_buffer[layer]->m_position, eRect(), gPixmap::blitAlphaBlend);
 493                 }
 494         }
 495
 496                 // flip activates on next vsync.
 497         p.flip();
 498         p.waitVSync();
 499
 500         if (notified)
 501                 p.notify();
 502
 503         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 504                 if (i->m_animation.m_active)
 505                         i->m_animation.tick(1);
 506 }
 507
 508 void eWidgetDesktop::notify()
 509 {
 510         redrawComposition(1);
 511 }
 512
 513 void eWidgetDesktop::clearVisibility(eWidget *widget)
 514 {
 515         widget->m_visible_with_childs = gRegion();
 516         for (ePtrList<eWidget>::iterator i(widget->m_childs.begin()); i != widget->m_childs.end(); ++i)
 517                 clearVisibility(*i);
 518 }
 519
 520 void eWidgetDesktop::resize(eSize size)
 521 {
 522         m_screen.m_dirty_region = gRegion(eRect(ePoint(0, 0), size));
 523         m_screen.m_screen_size = size;
 524 }