| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/gtk/region.cpp |
| 3 | // Purpose: |
| 4 | // Author: Robert Roebling |
| 5 | // Modified: VZ at 05.10.00: use AllocExclusive(), comparison fixed |
| 6 | // Id: $Id$ |
| 7 | // Copyright: (c) 1998 Robert Roebling |
| 8 | // Licence: wxWindows licence |
| 9 | ///////////////////////////////////////////////////////////////////////////// |
| 10 | |
| 11 | // ============================================================================ |
| 12 | // declarations |
| 13 | // ============================================================================ |
| 14 | |
| 15 | // ---------------------------------------------------------------------------- |
| 16 | // headers |
| 17 | // ---------------------------------------------------------------------------- |
| 18 | |
| 19 | // For compilers that support precompilation, includes "wx.h". |
| 20 | #include "wx/wxprec.h" |
| 21 | |
| 22 | #include "wx/region.h" |
| 23 | |
| 24 | #include <gdk/gdk.h> |
| 25 | |
| 26 | // ---------------------------------------------------------------------------- |
| 27 | // wxRegionRefData: private class containing the information about the region |
| 28 | // ---------------------------------------------------------------------------- |
| 29 | |
| 30 | class wxRegionRefData : public wxGDIRefData |
| 31 | { |
| 32 | public: |
| 33 | wxRegionRefData() |
| 34 | { |
| 35 | m_region = NULL; |
| 36 | } |
| 37 | |
| 38 | wxRegionRefData(const wxRegionRefData& refData) |
| 39 | : wxGDIRefData() |
| 40 | { |
| 41 | #ifdef __WXGTK3__ |
| 42 | m_region = cairo_region_copy(refData.m_region); |
| 43 | #else |
| 44 | m_region = gdk_region_copy(refData.m_region); |
| 45 | #endif |
| 46 | } |
| 47 | |
| 48 | virtual ~wxRegionRefData() |
| 49 | { |
| 50 | if (m_region) |
| 51 | { |
| 52 | #ifdef __WXGTK3__ |
| 53 | cairo_region_destroy(m_region); |
| 54 | #else |
| 55 | gdk_region_destroy( m_region ); |
| 56 | #endif |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | #ifdef __WXGTK3__ |
| 61 | cairo_region_t* m_region; |
| 62 | #else |
| 63 | GdkRegion *m_region; |
| 64 | #endif |
| 65 | }; |
| 66 | |
| 67 | // ---------------------------------------------------------------------------- |
| 68 | // macros |
| 69 | // ---------------------------------------------------------------------------- |
| 70 | |
| 71 | #define M_REGIONDATA static_cast<wxRegionRefData*>(m_refData) |
| 72 | #define M_REGIONDATA_OF(r) static_cast<wxRegionRefData*>(r.m_refData) |
| 73 | |
| 74 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) |
| 75 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject) |
| 76 | |
| 77 | // ---------------------------------------------------------------------------- |
| 78 | // wxRegion construction |
| 79 | // ---------------------------------------------------------------------------- |
| 80 | |
| 81 | void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h) |
| 82 | { |
| 83 | GdkRectangle rect; |
| 84 | rect.x = x; |
| 85 | rect.y = y; |
| 86 | rect.width = w; |
| 87 | rect.height = h; |
| 88 | |
| 89 | m_refData = new wxRegionRefData(); |
| 90 | |
| 91 | #ifdef __WXGTK3__ |
| 92 | M_REGIONDATA->m_region = cairo_region_create_rectangle(&rect); |
| 93 | #else |
| 94 | M_REGIONDATA->m_region = gdk_region_rectangle( &rect ); |
| 95 | #endif |
| 96 | } |
| 97 | |
| 98 | #ifndef __WXGTK3__ |
| 99 | wxRegion::wxRegion(const GdkRegion* region) |
| 100 | { |
| 101 | m_refData = new wxRegionRefData(); |
| 102 | M_REGIONDATA->m_region = gdk_region_copy(const_cast<GdkRegion*>(region)); |
| 103 | } |
| 104 | #endif |
| 105 | |
| 106 | wxRegion::wxRegion( size_t n, const wxPoint *points, |
| 107 | wxPolygonFillMode fillStyle ) |
| 108 | { |
| 109 | #ifdef __WXGTK3__ |
| 110 | // Make a cairo path from the points, draw it onto an image surface, use |
| 111 | // gdk_cairo_region_create_from_surface() to get a cairo region |
| 112 | |
| 113 | // need at least 3 points to make a useful polygon |
| 114 | if (n < 3) |
| 115 | return; |
| 116 | // get bounding rect |
| 117 | int min_x = points[0].x; |
| 118 | int max_x = min_x; |
| 119 | int min_y = points[0].y; |
| 120 | int max_y = min_y; |
| 121 | size_t i; |
| 122 | for (i = 1; i < n; i++) |
| 123 | { |
| 124 | const int x = points[i].x; |
| 125 | if (min_x > x) |
| 126 | min_x = x; |
| 127 | else if (max_x < x) |
| 128 | max_x = x; |
| 129 | const int y = points[i].y; |
| 130 | if (min_y > y) |
| 131 | min_y = y; |
| 132 | else if (max_y < y) |
| 133 | max_y = y; |
| 134 | } |
| 135 | const int w = max_x - min_x + 1; |
| 136 | const int h = max_y - min_y + 1; |
| 137 | // make surface just big enough to contain polygon (A1 is native format |
| 138 | // for gdk_cairo_region_create_from_surface) |
| 139 | cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_A1, w, h); |
| 140 | memset(cairo_image_surface_get_data(surface), 0, cairo_image_surface_get_stride(surface) * h); |
| 141 | cairo_surface_mark_dirty(surface); |
| 142 | cairo_surface_set_device_offset(surface, -min_x, -min_y); |
| 143 | cairo_t* cr = cairo_create(surface); |
| 144 | cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE); |
| 145 | if (fillStyle == wxODDEVEN_RULE) |
| 146 | cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD); |
| 147 | // make path |
| 148 | cairo_move_to(cr, points[0].x, points[0].y); |
| 149 | for (i = 1; i < n; i++) |
| 150 | cairo_line_to(cr, points[i].x, points[i].y); |
| 151 | cairo_close_path(cr); |
| 152 | cairo_fill(cr); |
| 153 | cairo_destroy(cr); |
| 154 | cairo_surface_flush(surface); |
| 155 | m_refData = new wxRegionRefData; |
| 156 | M_REGIONDATA->m_region = gdk_cairo_region_create_from_surface(surface); |
| 157 | cairo_surface_destroy(surface); |
| 158 | #else |
| 159 | GdkPoint *gdkpoints = new GdkPoint[n]; |
| 160 | for ( size_t i = 0 ; i < n ; i++ ) |
| 161 | { |
| 162 | gdkpoints[i].x = points[i].x; |
| 163 | gdkpoints[i].y = points[i].y; |
| 164 | } |
| 165 | |
| 166 | m_refData = new wxRegionRefData(); |
| 167 | |
| 168 | GdkRegion* reg = gdk_region_polygon |
| 169 | ( |
| 170 | gdkpoints, |
| 171 | n, |
| 172 | fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE |
| 173 | : GDK_EVEN_ODD_RULE |
| 174 | ); |
| 175 | |
| 176 | M_REGIONDATA->m_region = reg; |
| 177 | |
| 178 | delete [] gdkpoints; |
| 179 | #endif |
| 180 | } |
| 181 | |
| 182 | wxRegion::~wxRegion() |
| 183 | { |
| 184 | // m_refData unrefed in ~wxObject |
| 185 | } |
| 186 | |
| 187 | wxGDIRefData *wxRegion::CreateGDIRefData() const |
| 188 | { |
| 189 | // should never be called |
| 190 | wxFAIL; |
| 191 | return NULL; |
| 192 | } |
| 193 | |
| 194 | wxGDIRefData *wxRegion::CloneGDIRefData(const wxGDIRefData *data) const |
| 195 | { |
| 196 | return new wxRegionRefData(*static_cast<const wxRegionRefData*>(data)); |
| 197 | } |
| 198 | |
| 199 | // ---------------------------------------------------------------------------- |
| 200 | // wxRegion comparison |
| 201 | // ---------------------------------------------------------------------------- |
| 202 | |
| 203 | bool wxRegion::DoIsEqual(const wxRegion& region) const |
| 204 | { |
| 205 | #ifdef __WXGTK3__ |
| 206 | return cairo_region_equal( |
| 207 | M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region); |
| 208 | #else |
| 209 | return gdk_region_equal(M_REGIONDATA->m_region, |
| 210 | M_REGIONDATA_OF(region)->m_region) != 0; |
| 211 | #endif |
| 212 | } |
| 213 | |
| 214 | // ---------------------------------------------------------------------------- |
| 215 | // wxRegion operations |
| 216 | // ---------------------------------------------------------------------------- |
| 217 | |
| 218 | void wxRegion::Clear() |
| 219 | { |
| 220 | UnRef(); |
| 221 | } |
| 222 | |
| 223 | bool wxRegion::DoUnionWithRect(const wxRect& r) |
| 224 | { |
| 225 | // workaround for a strange GTK/X11 bug: taking union with an empty |
| 226 | // rectangle results in an empty region which is definitely not what we |
| 227 | // want |
| 228 | if ( r.IsEmpty() ) |
| 229 | return true; |
| 230 | |
| 231 | if ( !m_refData ) |
| 232 | { |
| 233 | InitRect(r.x, r.y, r.width, r.height); |
| 234 | } |
| 235 | else |
| 236 | { |
| 237 | AllocExclusive(); |
| 238 | |
| 239 | GdkRectangle rect; |
| 240 | rect.x = r.x; |
| 241 | rect.y = r.y; |
| 242 | rect.width = r.width; |
| 243 | rect.height = r.height; |
| 244 | |
| 245 | #ifdef __WXGTK3__ |
| 246 | cairo_region_union_rectangle(M_REGIONDATA->m_region, &rect); |
| 247 | #else |
| 248 | gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect ); |
| 249 | #endif |
| 250 | } |
| 251 | |
| 252 | return true; |
| 253 | } |
| 254 | |
| 255 | bool wxRegion::DoUnionWithRegion( const wxRegion& region ) |
| 256 | { |
| 257 | if (region.m_refData == NULL) |
| 258 | { } |
| 259 | else if (m_refData == NULL) |
| 260 | { |
| 261 | m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region)); |
| 262 | } |
| 263 | else |
| 264 | { |
| 265 | AllocExclusive(); |
| 266 | #ifdef __WXGTK3__ |
| 267 | cairo_region_union(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region); |
| 268 | #else |
| 269 | gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() ); |
| 270 | #endif |
| 271 | } |
| 272 | |
| 273 | return true; |
| 274 | } |
| 275 | |
| 276 | bool wxRegion::DoIntersect( const wxRegion& region ) |
| 277 | { |
| 278 | if (region.m_refData == NULL || m_refData == NULL) |
| 279 | return false; |
| 280 | |
| 281 | AllocExclusive(); |
| 282 | |
| 283 | #ifdef __WXGTK3__ |
| 284 | cairo_region_intersect(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region); |
| 285 | #else |
| 286 | gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() ); |
| 287 | #endif |
| 288 | |
| 289 | return true; |
| 290 | } |
| 291 | |
| 292 | bool wxRegion::DoSubtract( const wxRegion& region ) |
| 293 | { |
| 294 | if (region.m_refData == NULL || m_refData == NULL) |
| 295 | return false; |
| 296 | |
| 297 | AllocExclusive(); |
| 298 | |
| 299 | #ifdef __WXGTK3__ |
| 300 | cairo_region_subtract(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region); |
| 301 | #else |
| 302 | gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() ); |
| 303 | #endif |
| 304 | |
| 305 | return true; |
| 306 | } |
| 307 | |
| 308 | bool wxRegion::DoXor( const wxRegion& region ) |
| 309 | { |
| 310 | if (region.m_refData == NULL) |
| 311 | { } |
| 312 | else if (m_refData == NULL) |
| 313 | { |
| 314 | // XOR-ing with an invalid region is the same as XOR-ing with an empty |
| 315 | // one, i.e. it is simply a copy. |
| 316 | m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region)); |
| 317 | } |
| 318 | else |
| 319 | { |
| 320 | AllocExclusive(); |
| 321 | |
| 322 | #ifdef __WXGTK3__ |
| 323 | cairo_region_xor(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region); |
| 324 | #else |
| 325 | gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() ); |
| 326 | #endif |
| 327 | } |
| 328 | |
| 329 | return true; |
| 330 | } |
| 331 | |
| 332 | bool wxRegion::DoOffset( wxCoord x, wxCoord y ) |
| 333 | { |
| 334 | wxCHECK_MSG( m_refData, false, wxS("invalid region") ); |
| 335 | |
| 336 | AllocExclusive(); |
| 337 | |
| 338 | #ifdef __WXGTK3__ |
| 339 | cairo_region_translate(M_REGIONDATA->m_region, x, y); |
| 340 | #else |
| 341 | gdk_region_offset( M_REGIONDATA->m_region, x, y ); |
| 342 | #endif |
| 343 | |
| 344 | return true; |
| 345 | } |
| 346 | |
| 347 | // ---------------------------------------------------------------------------- |
| 348 | // wxRegion tests |
| 349 | // ---------------------------------------------------------------------------- |
| 350 | |
| 351 | bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const |
| 352 | { |
| 353 | if ( m_refData ) |
| 354 | { |
| 355 | GdkRectangle rect; |
| 356 | #ifdef __WXGTK3__ |
| 357 | cairo_region_get_extents(M_REGIONDATA->m_region, &rect); |
| 358 | #else |
| 359 | gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect ); |
| 360 | #endif |
| 361 | x = rect.x; |
| 362 | y = rect.y; |
| 363 | w = rect.width; |
| 364 | h = rect.height; |
| 365 | |
| 366 | return true; |
| 367 | } |
| 368 | else |
| 369 | { |
| 370 | x = 0; |
| 371 | y = 0; |
| 372 | w = -1; |
| 373 | h = -1; |
| 374 | |
| 375 | return false; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | bool wxRegion::IsEmpty() const |
| 380 | { |
| 381 | #ifdef __WXGTK3__ |
| 382 | return m_refData == NULL || cairo_region_is_empty(M_REGIONDATA->m_region); |
| 383 | #else |
| 384 | return m_refData == NULL || gdk_region_empty(M_REGIONDATA->m_region); |
| 385 | #endif |
| 386 | } |
| 387 | |
| 388 | wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const |
| 389 | { |
| 390 | #ifdef __WXGTK3__ |
| 391 | if (m_refData == NULL || !cairo_region_contains_point(M_REGIONDATA->m_region, x, y)) |
| 392 | #else |
| 393 | if (m_refData == NULL || !gdk_region_point_in(M_REGIONDATA->m_region, x, y)) |
| 394 | #endif |
| 395 | return wxOutRegion; |
| 396 | |
| 397 | return wxInRegion; |
| 398 | } |
| 399 | |
| 400 | wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const |
| 401 | { |
| 402 | if (!m_refData) |
| 403 | return wxOutRegion; |
| 404 | |
| 405 | GdkRectangle rect; |
| 406 | rect.x = r.x; |
| 407 | rect.y = r.y; |
| 408 | rect.width = r.width; |
| 409 | rect.height = r.height; |
| 410 | #ifdef __WXGTK3__ |
| 411 | switch (cairo_region_contains_rectangle(M_REGIONDATA->m_region, &rect)) |
| 412 | { |
| 413 | case CAIRO_REGION_OVERLAP_IN: return wxInRegion; |
| 414 | case CAIRO_REGION_OVERLAP_PART: return wxPartRegion; |
| 415 | default: break; |
| 416 | } |
| 417 | #else |
| 418 | GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect ); |
| 419 | switch (res) |
| 420 | { |
| 421 | case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion; |
| 422 | case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion; |
| 423 | case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion; |
| 424 | } |
| 425 | #endif |
| 426 | return wxOutRegion; |
| 427 | } |
| 428 | |
| 429 | #ifdef __WXGTK3__ |
| 430 | cairo_region_t* wxRegion::GetRegion() const |
| 431 | #else |
| 432 | GdkRegion *wxRegion::GetRegion() const |
| 433 | #endif |
| 434 | { |
| 435 | if (!m_refData) |
| 436 | return NULL; |
| 437 | |
| 438 | return M_REGIONDATA->m_region; |
| 439 | } |
| 440 | |
| 441 | // ---------------------------------------------------------------------------- |
| 442 | // wxRegionIterator |
| 443 | // ---------------------------------------------------------------------------- |
| 444 | |
| 445 | wxRegionIterator::wxRegionIterator() |
| 446 | { |
| 447 | Init(); |
| 448 | Reset(); |
| 449 | } |
| 450 | |
| 451 | wxRegionIterator::wxRegionIterator( const wxRegion& region ) |
| 452 | { |
| 453 | Init(); |
| 454 | Reset(region); |
| 455 | } |
| 456 | |
| 457 | void wxRegionIterator::Init() |
| 458 | { |
| 459 | m_rects = NULL; |
| 460 | m_numRects = 0; |
| 461 | } |
| 462 | |
| 463 | wxRegionIterator::~wxRegionIterator() |
| 464 | { |
| 465 | wxDELETEA(m_rects); |
| 466 | } |
| 467 | |
| 468 | void wxRegionIterator::CreateRects( const wxRegion& region ) |
| 469 | { |
| 470 | wxDELETEA(m_rects); |
| 471 | m_numRects = 0; |
| 472 | |
| 473 | #ifdef __WXGTK3__ |
| 474 | cairo_region_t* cairoRegion = region.GetRegion(); |
| 475 | if (cairoRegion == NULL) |
| 476 | return; |
| 477 | m_numRects = cairo_region_num_rectangles(cairoRegion); |
| 478 | |
| 479 | if (m_numRects) |
| 480 | { |
| 481 | m_rects = new wxRect[m_numRects]; |
| 482 | for (int i = 0; i < m_numRects; i++) |
| 483 | { |
| 484 | GdkRectangle gr; |
| 485 | cairo_region_get_rectangle(cairoRegion, i, &gr); |
| 486 | wxRect &wr = m_rects[i]; |
| 487 | wr.x = gr.x; |
| 488 | wr.y = gr.y; |
| 489 | wr.width = gr.width; |
| 490 | wr.height = gr.height; |
| 491 | } |
| 492 | } |
| 493 | #else |
| 494 | GdkRegion *gdkregion = region.GetRegion(); |
| 495 | if (!gdkregion) |
| 496 | return; |
| 497 | |
| 498 | GdkRectangle* gdkrects; |
| 499 | gdk_region_get_rectangles(gdkregion, &gdkrects, &m_numRects); |
| 500 | |
| 501 | if (m_numRects) |
| 502 | { |
| 503 | m_rects = new wxRect[m_numRects]; |
| 504 | for (int i = 0; i < m_numRects; ++i) |
| 505 | { |
| 506 | GdkRectangle &gr = gdkrects[i]; |
| 507 | wxRect &wr = m_rects[i]; |
| 508 | wr.x = gr.x; |
| 509 | wr.y = gr.y; |
| 510 | wr.width = gr.width; |
| 511 | wr.height = gr.height; |
| 512 | } |
| 513 | } |
| 514 | g_free( gdkrects ); |
| 515 | #endif |
| 516 | } |
| 517 | |
| 518 | void wxRegionIterator::Reset( const wxRegion& region ) |
| 519 | { |
| 520 | m_region = region; |
| 521 | CreateRects(region); |
| 522 | Reset(); |
| 523 | } |
| 524 | |
| 525 | bool wxRegionIterator::HaveRects() const |
| 526 | { |
| 527 | return m_current < m_numRects; |
| 528 | } |
| 529 | |
| 530 | wxRegionIterator& wxRegionIterator::operator ++ () |
| 531 | { |
| 532 | if (HaveRects()) |
| 533 | ++m_current; |
| 534 | |
| 535 | return *this; |
| 536 | } |
| 537 | |
| 538 | wxRegionIterator wxRegionIterator::operator ++ (int) |
| 539 | { |
| 540 | wxRegionIterator tmp = *this; |
| 541 | |
| 542 | if (HaveRects()) |
| 543 | ++m_current; |
| 544 | |
| 545 | return tmp; |
| 546 | } |
| 547 | |
| 548 | wxCoord wxRegionIterator::GetX() const |
| 549 | { |
| 550 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 551 | |
| 552 | return m_rects[m_current].x; |
| 553 | } |
| 554 | |
| 555 | wxCoord wxRegionIterator::GetY() const |
| 556 | { |
| 557 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 558 | |
| 559 | return m_rects[m_current].y; |
| 560 | } |
| 561 | |
| 562 | wxCoord wxRegionIterator::GetW() const |
| 563 | { |
| 564 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 565 | |
| 566 | return m_rects[m_current].width; |
| 567 | } |
| 568 | |
| 569 | wxCoord wxRegionIterator::GetH() const |
| 570 | { |
| 571 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 572 | |
| 573 | return m_rects[m_current].height; |
| 574 | } |
| 575 | |
| 576 | wxRect wxRegionIterator::GetRect() const |
| 577 | { |
| 578 | wxRect r; |
| 579 | if( HaveRects() ) |
| 580 | r = m_rects[m_current]; |
| 581 | |
| 582 | return r; |
| 583 | } |
| 584 | |
| 585 | wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri) |
| 586 | { |
| 587 | if (this != &ri) |
| 588 | { |
| 589 | wxDELETEA(m_rects); |
| 590 | |
| 591 | m_current = ri.m_current; |
| 592 | m_numRects = ri.m_numRects; |
| 593 | if ( m_numRects ) |
| 594 | { |
| 595 | m_rects = new wxRect[m_numRects]; |
| 596 | memcpy(m_rects, ri.m_rects, m_numRects * sizeof m_rects[0]); |
| 597 | } |
| 598 | } |
| 599 | return *this; |
| 600 | } |