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                                         /* CHECKME: don't we need to recalculate everything? after all, our buffer has changed and is likely to be cleared */
 150                         gRegion visible_before = root->m_visible_with_childs;
 151
 152                         comp->m_background_region = gRegion(eRect(comp->m_position, comp->m_screen_size));
 153
 154                         gRegion visible_new = root->m_visible_with_childs - visible_before;
 155                         gRegion visible_lost = visible_before - root->m_visible_with_childs;
 156                         visible_new.moveBy(root->position());
 157                         visible_lost.moveBy(root->position());
 158
 159                         invalidate(visible_new, root, i);
 160                         invalidate(visible_lost, root, i);
 161
 162                         calcWidgetClipRegion(root, comp->m_background_region);
 163                 }
 164         }
 165 }
 166
 167 void eWidgetDesktop::invalidateWidgetLayer(const gRegion &region, const eWidget *widget, int layer)
 168 {
 169         if (m_comp_mode == cmImmediate)
 170         {
 171                 invalidate(region);
 172                 return;
 173         }
 174         eWidgetDesktopCompBuffer *comp = widget->m_comp_buffer[layer];
 175         if (comp)
 176                 comp->m_dirty_region |= region;
 177 }
 178
 179 void eWidgetDesktop::invalidateWidget(const gRegion &region, const eWidget *widget, int layer)
 180 {
 181         if (m_comp_mode == cmImmediate)
 182         {
 183                 invalidate(region);
 184                 return;
 185         }
 186
 187         if (!(widget->m_vis & eWidget::wVisShow))
 188                 return;
 189
 190         gRegion mregion = region;
 191         if (layer == -1)
 192                 for (int layer = 0; layer < MAX_LAYER; ++layer)
 193                         invalidateWidgetLayer(mregion, widget, layer);
 194         else
 195                 invalidateWidgetLayer(mregion, widget, layer);
 196 }
 197
 198 void eWidgetDesktop::invalidate(const gRegion &region, const eWidget *widget, int layer)
 199 {
 200         if (region.empty())
 201                 return;
 202
 203         if (m_timer && !m_require_redraw)
 204                 m_timer->start(0, 1); // start singleshot redraw timer
 205
 206         m_require_redraw = 1;
 207
 208         if (m_comp_mode == cmImmediate)
 209         {
 210                         /* in immediate mode, we don't care for widget and layer, we use the topmost. */
 211                 m_screen.m_dirty_region |= region;
 212         } else
 213         {
 214                 if (!widget)
 215                         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 216                                 invalidateWidget(region, i);
 217                 else
 218                         invalidateWidget(region, widget, layer);
 219         }
 220 }
 221
 222 void eWidgetDesktop::setBackgroundColor(eWidgetDesktopCompBuffer *comp, gRGB col)
 223 {
 224         comp->m_background_color = col;
 225
 226                 /* if there's something visible from the background, redraw it with the new color. */
 227         if (comp->m_dc && comp->m_background_region.valid() && !comp->m_background_region.empty())
 228         {
 229                         /* todo: split out "setBackgroundColor / clear"... maybe? */
 230                 gPainter painter(comp->m_dc);
 231                 painter.resetClip(comp->m_background_region);
 232                 painter.setBackgroundColor(comp->m_background_color);
 233                 painter.clear();
 234         }
 235 }
 236
 237 void eWidgetDesktop::setBackgroundColor(gRGB col)
 238 {
 239         setBackgroundColor(&m_screen, col);
 240
 241         if (m_comp_mode == cmBuffered)
 242                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 243                 {
 244                         for (int l = 0; l < MAX_LAYER; ++l)
 245                                 if (i->m_comp_buffer[l])
 246                                         setBackgroundColor(i->m_comp_buffer[l], l ? gRGB(0, 0, 0, 0) : col); /* all layers above 0 will have a transparent background */
 247                 }
 248 }
 249
 250 void eWidgetDesktop::setPalette(gPixmap &pm)
 251 {
 252 //      if (m_comp_mode == cmImmediate)
 253         {
 254                 ASSERT(m_screen.m_dc);
 255                 gPainter painter(m_screen.m_dc);
 256                 painter.setPalette(&pm);
 257         }
 258
 259         if (m_comp_mode == cmBuffered)
 260         {
 261                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 262                 {
 263                         for (int l = 0; l < MAX_LAYER; ++l)
 264                         {
 265                                 if (!i->m_comp_buffer[l])
 266                                         continue;
 267                                 ASSERT(i->m_comp_buffer[l]->m_dc);
 268                                 gPainter painter(i->m_comp_buffer[l]->m_dc);
 269                                 painter.setPalette(&pm);
 270                         }
 271                 }
 272         }
 273 }
 274
 275 void eWidgetDesktop::paintBackground(eWidgetDesktopCompBuffer *comp)
 276 {
 277         if (!comp)
 278                 return;
 279
 280         comp->m_dirty_region &= comp->m_background_region;
 281
 282         gPainter painter(comp->m_dc);
 283
 284         painter.resetClip(comp->m_dirty_region);
 285         painter.setBackgroundColor(comp->m_background_color);
 286         painter.clear();
 287
 288         comp->m_dirty_region = gRegion();
 289 }
 290
 291
 292 void eWidgetDesktop::paintLayer(eWidget *widget, int layer)
 293 {
 294         eWidgetDesktopCompBuffer *comp = (m_comp_mode == cmImmediate) ? &m_screen : widget->m_comp_buffer[layer];
 295         if (m_comp_mode == cmImmediate)
 296                 ASSERT(layer == 0);
 297         if (!comp)
 298                 return;
 299         gPainter painter(comp->m_dc);
 300         painter.moveOffset(-comp->m_position);
 301         widget->doPaint(painter, comp->m_dirty_region, layer);
 302         painter.resetOffset();
 303 }
 304
 305 void eWidgetDesktop::paint()
 306 {
 307         m_require_redraw = 0;
 308
 309                 /* walk all root windows. */
 310         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 311         {
 312
 313                 if (!(i->m_vis & eWidget::wVisShow))
 314                         continue;
 315
 316                 if (m_comp_mode == cmImmediate)
 317                         paintLayer(i, 0);
 318                 else
 319                         for (int l = 0; l < MAX_LAYER; ++l)
 320                         {
 321                                 paintLayer(i, l);
 322                                 paintBackground(i->m_comp_buffer[l]);
 323                         }
 324         }
 325
 326         if (m_comp_mode == cmImmediate)
 327                 paintBackground(&m_screen);
 328
 329         if (m_comp_mode == cmBuffered)
 330         {
 331 //              redrawComposition(0);
 332         }
 333 }
 334
 335 void eWidgetDesktop::setDC(gDC *dc)
 336 {
 337         m_screen.m_dc = dc;
 338         if (m_comp_mode == cmBuffered)
 339                 redrawComposition(1);
 340 }
 341
 342 void eWidgetDesktop::setRedrawTask(eMainloop &ml)
 343 {
 344         if (m_mainloop)
 345         {
 346                 m_timer = 0;
 347                 m_mainloop = 0;
 348         }
 349         m_mainloop = &ml;
 350         m_timer = eTimer::create(m_mainloop);
 351         CONNECT(m_timer->timeout, eWidgetDesktop::paint);
 352
 353         if (m_require_redraw)
 354                 m_timer->start(0, 1);
 355 }
 356
 357 void eWidgetDesktop::makeCompatiblePixmap(ePtr<gPixmap> &pm)
 358 {
 359         makeCompatiblePixmap(*(pm.operator->()));
 360 }
 361
 362 void eWidgetDesktop::makeCompatiblePixmap(gPixmap &pm)
 363 {
 364         if (m_comp_mode != cmImmediate)
 365                 return;
 366
 367 //      eDebug("widgetDesktop: make compatible pixmap of %p", &pm);
 368         if (!m_screen.m_dc)
 369         {
 370                 eWarning("eWidgetDesktop: no DC to make pixmap compatible with!");
 371                 return;
 372         }
 373
 374         ePtr<gPixmap> target_pixmap;
 375         m_screen.m_dc->getPixmap(target_pixmap);
 376
 377         assert(target_pixmap);
 378
 379         if (target_pixmap->surface && target_pixmap->surface->bpp > 8)
 380                 return;
 381
 382         ePtr<gDC> pixmap_dc = new gDC(&pm);
 383         gPainter pixmap_painter(pixmap_dc);
 384
 385         pixmap_painter.mergePalette(target_pixmap);
 386 }
 387
 388 void eWidgetDesktop::setCompositionMode(int mode)
 389 {
 390         m_comp_mode = mode;
 391
 392         if (mode == cmBuffered)
 393                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 394                         createBufferForWidget(*i, 0);
 395         else
 396                 for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 397                         for (int l = 0; l < MAX_LAYER; ++l)
 398                                 removeBufferForWidget(*i, l);
 399 }
 400
 401 eWidgetDesktop::eWidgetDesktop(eSize size): m_mainloop(0)
 402 {
 403         m_screen.m_dirty_region = gRegion(eRect(ePoint(0, 0), size));
 404         m_screen.m_screen_size = size;
 405         m_require_redraw = 0;
 406         m_style_id = 0;
 407
 408         CONNECT(gRC::getInstance()->notify, eWidgetDesktop::notify);
 409         setCompositionMode(cmImmediate);
 410 }
 411
 412 eWidgetDesktop::~eWidgetDesktop()
 413 {
 414                 /* tell registered root windows that they no longer have a desktop. */
 415         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); )
 416         {
 417                 i->m_desktop = 0;
 418                 i = m_root.erase(i);
 419         }
 420                 /* destroy all buffers */
 421         setCompositionMode(-1);
 422 }
 423
 424 void eWidgetDesktop::createBufferForWidget(eWidget *widget, int layer)
 425 {
 426         removeBufferForWidget(widget, layer);
 427
 428         eWidgetDesktopCompBuffer *comp = widget->m_comp_buffer[layer] = new eWidgetDesktopCompBuffer;
 429
 430         eDebug("create buffer for widget layer %d, %d x %d\n", layer, widget->size().width(), widget->size().height());
 431
 432         eRect bbox = eRect(widget->position(), widget->size());
 433         comp->m_position = bbox.topLeft();
 434         comp->m_dirty_region = gRegion(eRect(ePoint(0, 0), bbox.size()));
 435         comp->m_screen_size = bbox.size();
 436                 /* TODO: configurable bit depth. */
 437
 438                 /* clone palette. FIXME. */
 439         ePtr<gPixmap> pm = new gPixmap(comp->m_screen_size, 32, 1), pm_screen;
 440         pm->surface->clut.data = new gRGB[256];
 441         pm->surface->clut.colors = 256;
 442         pm->surface->clut.start = 0;
 443
 444         m_screen.m_dc->getPixmap(pm_screen);
 445
 446         memcpy(pm->surface->clut.data, pm_screen->surface->clut.data, 256 * sizeof(gRGB));
 447
 448         comp->m_dc = new gDC(pm);
 449 }
 450
 451 void eWidgetDesktop::removeBufferForWidget(eWidget *widget, int layer)
 452 {
 453         if (widget->m_comp_buffer[layer])
 454         {
 455                 delete widget->m_comp_buffer[layer];
 456                 widget->m_comp_buffer[layer] = 0;
 457         }
 458 }
 459
 460 void eWidgetDesktop::redrawComposition(int notified)
 461 {
 462         if (m_comp_mode != cmBuffered)
 463                 return;
 464
 465         assert(m_screen.m_dc);
 466
 467         gPainter p(m_screen.m_dc);
 468         p.resetClip(eRect(ePoint(0, 0), m_screen.m_screen_size));
 469         p.setBackgroundColor(m_screen.m_background_color);
 470         p.clear();
 471
 472         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 473         {
 474                 if (!i->isVisible())
 475                         continue;
 476                 for (int layer = 0; layer < MAX_LAYER; ++layer)
 477                 {
 478                         ePtr<gPixmap> pm;
 479                         if (!i->m_comp_buffer[layer])
 480                                 continue;
 481                         i->m_comp_buffer[layer]->m_dc->getPixmap(pm);
 482                         p.blit(pm, i->m_comp_buffer[layer]->m_position, eRect(), gPixmap::blitAlphaBlend);
 483                 }
 484         }
 485
 486                 // flip activates on next vsync.
 487         p.flip();
 488         p.waitVSync();
 489
 490         if (notified)
 491                 p.notify();
 492
 493         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
 494                 if (i->m_animation.m_active)
 495                         i->m_animation.tick(1);
 496 }
 497
 498 void eWidgetDesktop::notify()
 499 {
 500         redrawComposition(1);
 501 }
 502
 503 void eWidgetDesktop::clearVisibility(eWidget *widget)
 504 {
 505         widget->m_visible_with_childs = gRegion();
 506         for (ePtrList<eWidget>::iterator i(widget->m_childs.begin()); i != widget->m_childs.end(); ++i)
 507                 clearVisibility(*i);
 508 }
 509
 510 void eWidgetDesktop::resize(eSize size)
 511 {
 512         m_screen.m_dirty_region = gRegion(eRect(ePoint(0, 0), size));
 513         m_screen.m_screen_size = size;
 514 }