]> git.saurik.com Git - wxWidgets.git/blob - src/msw/dc.cpp
projects / wxWidgets.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Updated to new PyCrust
[wxWidgets.git] / src / msw / dc.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: dc.cpp
3 // Purpose: wxDC class
4 // Author: Julian Smart
5 // Modified by:
6 // Created: 01/02/97
7 // RCS-ID: $Id$
8 // Copyright: (c) Julian Smart and Markus Holzem
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ===========================================================================
13 // declarations
14 // ===========================================================================
15
16 // ---------------------------------------------------------------------------
17 // headers
18 // ---------------------------------------------------------------------------
19
20 #ifdef __GNUG__
21 #pragma implementation "dc.h"
22 #endif
23
24 // For compilers that support precompilation, includes "wx.h".
25 #include "wx/wxprec.h"
26
27 #ifdef __BORLANDC__
28 #pragma hdrstop
29 #endif
30
31 #ifndef WX_PRECOMP
32 #include "wx/window.h"
33 #include "wx/dc.h"
34 #include "wx/utils.h"
35 #include "wx/dialog.h"
36 #include "wx/app.h"
37 #include "wx/bitmap.h"
38 #include "wx/dcmemory.h"
39 #include "wx/log.h"
40 #include "wx/icon.h"
41 #endif
42
43 #include "wx/sysopt.h"
44 #include "wx/dcprint.h"
45 #include "wx/module.h"
46
47 #include <string.h>
48 #include <math.h>
49
50 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
51
52 #if wxUSE_COMMON_DIALOGS
53 #include <commdlg.h>
54 #endif
55
56 #ifndef __WIN32__
57 #include <print.h>
58 #endif
59
60 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
61
62 // ---------------------------------------------------------------------------
63 // constants
64 // ---------------------------------------------------------------------------
65
66 static const int VIEWPORT_EXTENT = 1000;
67
68 static const int MM_POINTS = 9;
69 static const int MM_METRIC = 10;
70
71 // usually this is defined in math.h
72 #ifndef M_PI
73 static const double M_PI = 3.14159265358979323846;
74 #endif // M_PI
75
76 // ROPs which don't have standard names (see "Ternary Raster Operations" in the
77 // MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
78 #define DSTCOPY 0x00AA0029 // a.k.a. NOP operation
79
80 // ---------------------------------------------------------------------------
81 // private functions
82 // ---------------------------------------------------------------------------
83
84 // convert degrees to radians
85 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
86
87 // ----------------------------------------------------------------------------
88 // private classes
89 // ----------------------------------------------------------------------------
90
91 // instead of duplicating the same code which sets and then restores text
92 // colours in each wxDC method working with wxSTIPPLE_MASK_OPAQUE brushes,
93 // encapsulate this in a small helper class
94
95 // wxColourChanger: changes the text colours in the ctor if required and
96 // restores them in the dtor
97 class wxColourChanger
98 {
99 public:
100 wxColourChanger(wxDC& dc);
101 ~wxColourChanger();
102
103 private:
104 wxDC& m_dc;
105
106 COLORREF m_colFgOld, m_colBgOld;
107
108 bool m_changed;
109 };
110
111 // ===========================================================================
112 // implementation
113 // ===========================================================================
114
115 // ----------------------------------------------------------------------------
116 // wxColourChanger
117 // ----------------------------------------------------------------------------
118
119 wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc)
120 {
121 if ( dc.GetBrush().GetStyle() == wxSTIPPLE_MASK_OPAQUE )
122 {
123 HDC hdc = GetHdcOf(dc);
124 m_colFgOld = ::GetTextColor(hdc);
125 m_colBgOld = ::GetBkColor(hdc);
126
127 // note that Windows convention is opposite to wxWindows one, this is
128 // why text colour becomes the background one and vice versa
129 const wxColour& colFg = dc.GetTextForeground();
130 if ( colFg.Ok() )
131 {
132 ::SetBkColor(hdc, colFg.GetPixel());
133 }
134
135 const wxColour& colBg = dc.GetTextBackground();
136 if ( colBg.Ok() )
137 {
138 ::SetTextColor(hdc, colBg.GetPixel());
139 }
140
141 SetBkMode(hdc,
142 dc.GetBackgroundMode() == wxTRANSPARENT ? TRANSPARENT
143 : OPAQUE);
144
145 // flag which telsl us to undo changes in the dtor
146 m_changed = TRUE;
147 }
148 else
149 {
150 // nothing done, nothing to undo
151 m_changed = FALSE;
152 }
153 }
154
155 wxColourChanger::~wxColourChanger()
156 {
157 if ( m_changed )
158 {
159 // restore the colours we changed
160 HDC hdc = GetHdcOf(m_dc);
161
162 ::SetBkMode(hdc, TRANSPARENT);
163 ::SetTextColor(hdc, m_colFgOld);
164 ::SetBkColor(hdc, m_colBgOld);
165 }
166 }
167
168 // ---------------------------------------------------------------------------
169 // wxDC
170 // ---------------------------------------------------------------------------
171
172 // Default constructor
173 wxDC::wxDC()
174 {
175 m_canvas = NULL;
176
177 m_oldBitmap = 0;
178 m_oldPen = 0;
179 m_oldBrush = 0;
180 m_oldFont = 0;
181 #if wxUSE_PALETTE
182 m_oldPalette = 0;
183 #endif // wxUSE_PALETTE
184
185 m_bOwnsDC = FALSE;
186 m_hDC = 0;
187
188 m_windowExtX = VIEWPORT_EXTENT;
189 m_windowExtY = VIEWPORT_EXTENT;
190 }
191
192
193 wxDC::~wxDC()
194 {
195 if ( m_hDC != 0 )
196 {
197 SelectOldObjects(m_hDC);
198
199 // if we own the HDC, we delete it, otherwise we just release it
200
201 if ( m_bOwnsDC )
202 {
203 ::DeleteDC(GetHdc());
204 }
205 else // we don't own our HDC
206 {
207 if (m_canvas)
208 {
209 ::ReleaseDC(GetHwndOf(m_canvas), GetHdc());
210 }
211 else
212 {
213 // Must have been a wxScreenDC
214 ::ReleaseDC((HWND) NULL, GetHdc());
215 }
216 }
217 }
218 }
219
220 // This will select current objects out of the DC,
221 // which is what you have to do before deleting the
222 // DC.
223 void wxDC::SelectOldObjects(WXHDC dc)
224 {
225 if (dc)
226 {
227 if (m_oldBitmap)
228 {
229 ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
230 if (m_selectedBitmap.Ok())
231 {
232 m_selectedBitmap.SetSelectedInto(NULL);
233 }
234 }
235 m_oldBitmap = 0;
236 if (m_oldPen)
237 {
238 ::SelectObject((HDC) dc, (HPEN) m_oldPen);
239 }
240 m_oldPen = 0;
241 if (m_oldBrush)
242 {
243 ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
244 }
245 m_oldBrush = 0;
246 if (m_oldFont)
247 {
248 ::SelectObject((HDC) dc, (HFONT) m_oldFont);
249 }
250 m_oldFont = 0;
251
252 #if wxUSE_PALETTE
253 if (m_oldPalette)
254 {
255 ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, FALSE);
256 }
257 m_oldPalette = 0;
258 #endif // wxUSE_PALETTE
259 }
260
261 m_brush = wxNullBrush;
262 m_pen = wxNullPen;
263 #if wxUSE_PALETTE
264 m_palette = wxNullPalette;
265 #endif // wxUSE_PALETTE
266 m_font = wxNullFont;
267 m_backgroundBrush = wxNullBrush;
268 m_selectedBitmap = wxNullBitmap;
269 }
270
271 // ---------------------------------------------------------------------------
272 // clipping
273 // ---------------------------------------------------------------------------
274
275 void wxDC::UpdateClipBox()
276 {
277 #ifdef __WXMICROWIN__
278 if (!GetHDC()) return;
279 #endif
280
281 RECT rect;
282 GetClipBox(GetHdc(), &rect);
283
284 m_clipX1 = (wxCoord) XDEV2LOG(rect.left);
285 m_clipY1 = (wxCoord) YDEV2LOG(rect.top);
286 m_clipX2 = (wxCoord) XDEV2LOG(rect.right);
287 m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
288 }
289
290 void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
291 {
292 #ifdef __WXMICROWIN__
293 if (!GetHDC()) return;
294 #endif
295
296 m_clipping = TRUE;
297
298 // the region coords are always the device ones, so do the translation
299 // manually
300 //
301 // FIXME: possible +/-1 error here, to check!
302 HRGN hrgn = ::CreateRectRgn(LogicalToDeviceX(x),
303 LogicalToDeviceY(y),
304 LogicalToDeviceX(x + w),
305 LogicalToDeviceY(y + h));
306 if ( !hrgn )
307 {
308 wxLogLastError(_T("CreateRectRgn"));
309 }
310 else
311 {
312 if ( ::SelectClipRgn(GetHdc(), hrgn) == ERROR )
313 {
314 wxLogLastError(_T("SelectClipRgn"));
315 }
316 DeleteObject(hrgn);
317
318 UpdateClipBox();
319 }
320 }
321
322 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
323 {
324 #ifdef __WXMICROWIN__
325 if (!GetHDC()) return;
326 #endif
327
328 wxCHECK_RET( GetHrgnOf(region), wxT("invalid clipping region") );
329
330 m_clipping = TRUE;
331
332 #ifdef __WIN16__
333 SelectClipRgn(GetHdc(), GetHrgnOf(region));
334 #else // Win32
335 ExtSelectClipRgn(GetHdc(), GetHrgnOf(region), RGN_AND);
336 #endif // Win16/32
337
338 UpdateClipBox();
339 }
340
341 void wxDC::DestroyClippingRegion()
342 {
343 #ifdef __WXMICROWIN__
344 if (!GetHDC()) return;
345 #endif
346
347 if (m_clipping && m_hDC)
348 {
349 // TODO: this should restore the previous clipping region,
350 // so that OnPaint processing works correctly, and the update clipping region
351 // doesn't get destroyed after the first DestroyClippingRegion.
352 HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
353 SelectClipRgn(GetHdc(), rgn);
354 DeleteObject(rgn);
355 }
356
357 m_clipping = FALSE;
358 }
359
360 // ---------------------------------------------------------------------------
361 // query capabilities
362 // ---------------------------------------------------------------------------
363
364 bool wxDC::CanDrawBitmap() const
365 {
366 return TRUE;
367 }
368
369 bool wxDC::CanGetTextExtent() const
370 {
371 #ifdef __WXMICROWIN__
372 // TODO Extend MicroWindows' GetDeviceCaps function
373 return TRUE;
374 #else
375 // What sort of display is it?
376 int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
377
378 return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
379 #endif
380 }
381
382 int wxDC::GetDepth() const
383 {
384 #ifdef __WXMICROWIN__
385 if (!GetHDC()) return 16;
386 #endif
387
388 return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
389 }
390
391 // ---------------------------------------------------------------------------
392 // drawing
393 // ---------------------------------------------------------------------------
394
395 void wxDC::Clear()
396 {
397 #ifdef __WXMICROWIN__
398 if (!GetHDC()) return;
399 #endif
400
401 RECT rect;
402 if ( m_canvas )
403 {
404 GetClientRect((HWND) m_canvas->GetHWND(), &rect);
405 }
406 else
407 {
408 // No, I think we should simply ignore this if printing on e.g.
409 // a printer DC.
410 // wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") );
411 if (!m_selectedBitmap.Ok())
412 return;
413
414 rect.left = 0; rect.top = 0;
415 rect.right = m_selectedBitmap.GetWidth();
416 rect.bottom = m_selectedBitmap.GetHeight();
417 }
418
419 (void) ::SetMapMode(GetHdc(), MM_TEXT);
420
421 DWORD colour = GetBkColor(GetHdc());
422 HBRUSH brush = CreateSolidBrush(colour);
423 FillRect(GetHdc(), &rect, brush);
424 DeleteObject(brush);
425
426 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
427 ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
428 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
429 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
430 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
431 }
432
433 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
434 {
435 #ifdef __WXMICROWIN__
436 if (!GetHDC()) return;
437 #endif
438
439 if ( !::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
440 col.GetPixel(),
441 style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
442 : FLOODFILLBORDER) )
443 {
444 // quoting from the MSDN docs:
445 //
446 // Following are some of the reasons this function might fail:
447 //
448 // * The filling could not be completed.
449 // * The specified point has the boundary color specified by the
450 // crColor parameter (if FLOODFILLBORDER was requested).
451 // * The specified point does not have the color specified by
452 // crColor (if FLOODFILLSURFACE was requested)
453 // * The point is outside the clipping region that is, it is not
454 // visible on the device.
455 //
456 wxLogLastError(wxT("ExtFloodFill"));
457 }
458
459 CalcBoundingBox(x, y);
460 }
461
462 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
463 {
464 #ifdef __WXMICROWIN__
465 if (!GetHDC()) return FALSE;
466 #endif
467
468 wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel") );
469
470 // get the color of the pixel
471 COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
472
473 wxRGBToColour(*col, pixelcolor);
474
475 return TRUE;
476 }
477
478 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
479 {
480 #ifdef __WXMICROWIN__
481 if (!GetHDC()) return;
482 #endif
483
484 wxCoord x1 = x-VIEWPORT_EXTENT;
485 wxCoord y1 = y-VIEWPORT_EXTENT;
486 wxCoord x2 = x+VIEWPORT_EXTENT;
487 wxCoord y2 = y+VIEWPORT_EXTENT;
488
489 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
490 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
491
492 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
493 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
494
495 CalcBoundingBox(x1, y1);
496 CalcBoundingBox(x2, y2);
497 }
498
499 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
500 {
501 #ifdef __WXMICROWIN__
502 if (!GetHDC()) return;
503 #endif
504
505 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
506 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
507
508 // Normalization: Windows doesn't draw the last point of the line.
509 // But apparently neither does GTK+, so we take it out again.
510 // (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
511
512 CalcBoundingBox(x1, y1);
513 CalcBoundingBox(x2, y2);
514 }
515
516 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
517 // and ending at (x2, y2)
518 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
519 wxCoord x2, wxCoord y2,
520 wxCoord xc, wxCoord yc)
521 {
522 #ifdef __WXMICROWIN__
523 if (!GetHDC()) return;
524 #endif
525
526 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
527
528 double dx = xc - x1;
529 double dy = yc - y1;
530 double radius = (double)sqrt(dx*dx+dy*dy);
531 wxCoord r = (wxCoord)radius;
532
533 // treat the special case of full circle separately
534 if ( x1 == x2 && y1 == y2 )
535 {
536 DrawEllipse(xc - r, yc - r, 2*r, 2*r);
537 return;
538 }
539
540 wxCoord xx1 = XLOG2DEV(x1);
541 wxCoord yy1 = YLOG2DEV(y1);
542 wxCoord xx2 = XLOG2DEV(x2);
543 wxCoord yy2 = YLOG2DEV(y2);
544 wxCoord xxc = XLOG2DEV(xc);
545 wxCoord yyc = YLOG2DEV(yc);
546 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
547
548 wxCoord xxx1 = (wxCoord) (xxc-ray);
549 wxCoord yyy1 = (wxCoord) (yyc-ray);
550 wxCoord xxx2 = (wxCoord) (xxc+ray);
551 wxCoord yyy2 = (wxCoord) (yyc+ray);
552
553 if ( m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT )
554 {
555 // Have to add 1 to bottom-right corner of rectangle
556 // to make semi-circles look right (crooked line otherwise).
557 // Unfortunately this is not a reliable method, depends
558 // on the size of shape.
559 // TODO: figure out why this happens!
560 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1, xx1,yy1,xx2,yy2);
561 }
562 else
563 {
564 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2, xx1,yy1,xx2,yy2);
565 }
566
567 CalcBoundingBox(xc - r, yc - r);
568 CalcBoundingBox(xc + r, yc + r);
569 }
570
571 void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
572 wxCoord width, wxCoord height)
573 {
574 #ifdef __WXMICROWIN__
575 if (!GetHDC()) return;
576 #endif
577
578 wxCoord x2 = x1 + width,
579 y2 = y1 + height;
580
581 #if defined(__WIN32__) && !defined(__SC__) && !defined(__WXMICROWIN__)
582 RECT rect;
583 rect.left = x1;
584 rect.top = y1;
585 rect.right = x2;
586 rect.bottom = y2;
587
588 DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
589 #else // Win16
590 // In WIN16, draw a cross
591 HPEN blackPen = ::CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
592 HPEN whiteBrush = (HPEN)::GetStockObject(WHITE_BRUSH);
593 HPEN hPenOld = (HPEN)::SelectObject(GetHdc(), blackPen);
594 HPEN hBrushOld = (HPEN)::SelectObject(GetHdc(), whiteBrush);
595 ::SetROP2(GetHdc(), R2_COPYPEN);
596 Rectangle(GetHdc(), x1, y1, x2, y2);
597 MoveToEx(GetHdc(), x1, y1, NULL);
598 LineTo(GetHdc(), x2, y2);
599 MoveToEx(GetHdc(), x2, y1, NULL);
600 LineTo(GetHdc(), x1, y2);
601 ::SelectObject(GetHdc(), hPenOld);
602 ::SelectObject(GetHdc(), hBrushOld);
603 ::DeleteObject(blackPen);
604 #endif // Win32/16
605
606 CalcBoundingBox(x1, y1);
607 CalcBoundingBox(x2, y2);
608 }
609
610 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
611 {
612 #ifdef __WXMICROWIN__
613 if (!GetHDC()) return;
614 #endif
615
616 COLORREF color = 0x00ffffff;
617 if (m_pen.Ok())
618 {
619 color = m_pen.GetColour().GetPixel();
620 }
621
622 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
623
624 CalcBoundingBox(x, y);
625 }
626
627 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
628 {
629 #ifdef __WXMICROWIN__
630 if (!GetHDC()) return;
631 #endif
632
633 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
634
635 // Do things less efficiently if we have offsets
636 if (xoffset != 0 || yoffset != 0)
637 {
638 POINT *cpoints = new POINT[n];
639 int i;
640 for (i = 0; i < n; i++)
641 {
642 cpoints[i].x = (int)(points[i].x + xoffset);
643 cpoints[i].y = (int)(points[i].y + yoffset);
644
645 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
646 }
647 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
648 (void)Polygon(GetHdc(), cpoints, n);
649 SetPolyFillMode(GetHdc(),prev);
650 delete[] cpoints;
651 }
652 else
653 {
654 int i;
655 for (i = 0; i < n; i++)
656 CalcBoundingBox(points[i].x, points[i].y);
657
658 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
659 (void)Polygon(GetHdc(), (POINT*) points, n);
660 SetPolyFillMode(GetHdc(),prev);
661 }
662 }
663
664 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
665 {
666 #ifdef __WXMICROWIN__
667 if (!GetHDC()) return;
668 #endif
669
670 // Do things less efficiently if we have offsets
671 if (xoffset != 0 || yoffset != 0)
672 {
673 POINT *cpoints = new POINT[n];
674 int i;
675 for (i = 0; i < n; i++)
676 {
677 cpoints[i].x = (int)(points[i].x + xoffset);
678 cpoints[i].y = (int)(points[i].y + yoffset);
679
680 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
681 }
682 (void)Polyline(GetHdc(), cpoints, n);
683 delete[] cpoints;
684 }
685 else
686 {
687 int i;
688 for (i = 0; i < n; i++)
689 CalcBoundingBox(points[i].x, points[i].y);
690
691 (void)Polyline(GetHdc(), (POINT*) points, n);
692 }
693 }
694
695 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
696 {
697 #ifdef __WXMICROWIN__
698 if (!GetHDC()) return;
699 #endif
700
701 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
702
703 wxCoord x2 = x + width;
704 wxCoord y2 = y + height;
705
706 if ((m_logicalFunction == wxCOPY) && (m_pen.GetStyle() == wxTRANSPARENT))
707 {
708 RECT rect;
709 rect.left = XLOG2DEV(x);
710 rect.top = YLOG2DEV(y);
711 rect.right = XLOG2DEV(x2);
712 rect.bottom = YLOG2DEV(y2);
713 (void)FillRect(GetHdc(), &rect, (HBRUSH)m_brush.GetResourceHandle() );
714 }
715 else
716 {
717 // Windows draws the filled rectangles without outline (i.e. drawn with a
718 // transparent pen) one pixel smaller in both directions and we want them
719 // to have the same size regardless of which pen is used - adjust
720
721 // I wonder if this shouldn´t be done after the LOG2DEV() conversions. RR.
722 if ( m_pen.GetStyle() == wxTRANSPARENT )
723 {
724 x2++;
725 y2++;
726 }
727
728 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
729 }
730
731
732 CalcBoundingBox(x, y);
733 CalcBoundingBox(x2, y2);
734 }
735
736 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
737 {
738 #ifdef __WXMICROWIN__
739 if (!GetHDC()) return;
740 #endif
741
742 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
743
744 // Now, a negative radius value is interpreted to mean
745 // 'the proportion of the smallest X or Y dimension'
746
747 if (radius < 0.0)
748 {
749 double smallest = 0.0;
750 if (width < height)
751 smallest = width;
752 else
753 smallest = height;
754 radius = (- radius * smallest);
755 }
756
757 wxCoord x2 = (x+width);
758 wxCoord y2 = (y+height);
759
760 // Windows draws the filled rectangles without outline (i.e. drawn with a
761 // transparent pen) one pixel smaller in both directions and we want them
762 // to have the same size regardless of which pen is used - adjust
763 if ( m_pen.GetStyle() == wxTRANSPARENT )
764 {
765 x2++;
766 y2++;
767 }
768
769 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
770 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
771
772 CalcBoundingBox(x, y);
773 CalcBoundingBox(x2, y2);
774 }
775
776 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
777 {
778 #ifdef __WXMICROWIN__
779 if (!GetHDC()) return;
780 #endif
781
782 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
783
784 wxCoord x2 = (x+width);
785 wxCoord y2 = (y+height);
786
787 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
788
789 CalcBoundingBox(x, y);
790 CalcBoundingBox(x2, y2);
791 }
792
793 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
794 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
795 {
796 #ifdef __WXMICROWIN__
797 if (!GetHDC()) return;
798 #endif
799
800 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
801
802 wxCoord x2 = x + w;
803 wxCoord y2 = y + h;
804
805 int rx1 = XLOG2DEV(x+w/2);
806 int ry1 = YLOG2DEV(y+h/2);
807 int rx2 = rx1;
808 int ry2 = ry1;
809
810 sa = DegToRad(sa);
811 ea = DegToRad(ea);
812
813 rx1 += (int)(100.0 * abs(w) * cos(sa));
814 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
815 rx2 += (int)(100.0 * abs(w) * cos(ea));
816 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
817
818 // draw pie with NULL_PEN first and then outline otherwise a line is
819 // drawn from the start and end points to the centre
820 HPEN hpenOld = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
821 if (m_signY > 0)
822 {
823 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
824 rx1, ry1, rx2, ry2);
825 }
826 else
827 {
828 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
829 rx1, ry1-1, rx2, ry2-1);
830 }
831
832 ::SelectObject(GetHdc(), hpenOld);
833
834 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
835 rx1, ry1, rx2, ry2);
836
837 CalcBoundingBox(x, y);
838 CalcBoundingBox(x2, y2);
839 }
840
841 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
842 {
843 #ifdef __WXMICROWIN__
844 if (!GetHDC()) return;
845 #endif
846
847 wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
848
849 #ifdef __WIN32__
850 ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon), icon.GetWidth(), icon.GetHeight(), 0, NULL, DI_NORMAL);
851 #else
852 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon));
853 #endif
854
855 CalcBoundingBox(x, y);
856 CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
857 }
858
859 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
860 {
861 #ifdef __WXMICROWIN__
862 if (!GetHDC()) return;
863 #endif
864
865 wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
866
867 int width = bmp.GetWidth(),
868 height = bmp.GetHeight();
869
870 HBITMAP hbmpMask = 0;
871 HPALETTE oldPal = 0;
872
873 if ( useMask )
874 {
875 wxMask *mask = bmp.GetMask();
876 if ( mask )
877 hbmpMask = (HBITMAP)mask->GetMaskBitmap();
878
879 if ( !hbmpMask )
880 {
881 // don't give assert here because this would break existing
882 // programs - just silently ignore useMask parameter
883 useMask = FALSE;
884 }
885 }
886
887 if ( useMask )
888 {
889 #ifdef __WIN32__
890 // use MaskBlt() with ROP which doesn't do anything to dst in the mask
891 // points
892 // On some systems, MaskBlt succeeds yet is much much slower
893 // than the wxWindows fall-back implementation. So we need
894 // to be able to switch this on and off at runtime.
895 bool ok = FALSE;
896 #if wxUSE_SYSTEM_OPTIONS
897 if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
898 #endif
899 {
900 HDC cdc = GetHdc();
901 HDC hdcMem = ::CreateCompatibleDC(GetHdc());
902 ::SelectObject(hdcMem, GetHbitmapOf(bmp));
903 if (bmp.GetPalette() && (::GetDeviceCaps(cdc,BITSPIXEL) <= 8)) {
904 oldPal = ::SelectPalette( hdcMem, (HPALETTE)bmp.GetPalette()->GetHPALETTE(), FALSE);
905 ::RealizePalette(hdcMem);
906 }
907 ok = ::MaskBlt(cdc, x, y, width, height,
908 hdcMem, 0, 0,
909 hbmpMask, 0, 0,
910 MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
911 if (oldPal)
912 ::SelectPalette(hdcMem, oldPal, FALSE);
913 ::DeleteDC(hdcMem);
914 }
915
916 if ( !ok )
917 #endif // Win32
918 {
919 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API
920 // level
921 wxMemoryDC memDC;
922 memDC.SelectObject(bmp);
923
924 Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
925
926 memDC.SelectObject(wxNullBitmap);
927 }
928 }
929 else // no mask, just use BitBlt()
930 {
931 HDC cdc = GetHdc();
932 HDC memdc = ::CreateCompatibleDC( cdc );
933 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
934
935 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
936
937 COLORREF old_textground = ::GetTextColor(GetHdc());
938 COLORREF old_background = ::GetBkColor(GetHdc());
939 if (m_textForegroundColour.Ok())
940 {
941 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
942 }
943 if (m_textBackgroundColour.Ok())
944 {
945 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
946 }
947
948 if (bmp.GetPalette() && (::GetDeviceCaps(cdc,BITSPIXEL) <= 8)) {
949 oldPal = ::SelectPalette( memdc, (HPALETTE)bmp.GetPalette()->GetHPALETTE(), FALSE);
950 ::RealizePalette(memdc);
951 }
952 ::SelectObject( memdc, hbitmap );
953 ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
954 if (oldPal)
955 ::SelectPalette(memdc, oldPal, FALSE);
956 ::DeleteDC( memdc );
957
958 ::SetTextColor(GetHdc(), old_textground);
959 ::SetBkColor(GetHdc(), old_background);
960 }
961 }
962
963 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
964 {
965 #ifdef __WXMICROWIN__
966 if (!GetHDC()) return;
967 #endif
968
969 DrawAnyText(text, x, y);
970
971 // update the bounding box
972 CalcBoundingBox(x, y);
973
974 wxCoord w, h;
975 GetTextExtent(text, &w, &h);
976 CalcBoundingBox(x + w, y + h);
977 }
978
979 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
980 {
981 #ifdef __WXMICROWIN__
982 if (!GetHDC()) return;
983 #endif
984
985 // prepare for drawing the text
986 if ( m_textForegroundColour.Ok() )
987 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
988
989 DWORD old_background = 0;
990 if ( m_textBackgroundColour.Ok() )
991 {
992 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
993 }
994
995 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
996 : OPAQUE);
997
998 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
999 text.c_str(), text.length()) == 0 )
1000 {
1001 wxLogLastError(wxT("TextOut"));
1002 }
1003
1004 // restore the old parameters (text foreground colour may be left because
1005 // it never is set to anything else, but background should remain
1006 // transparent even if we just drew an opaque string)
1007 if ( m_textBackgroundColour.Ok() )
1008 (void)SetBkColor(GetHdc(), old_background);
1009
1010 SetBkMode(GetHdc(), TRANSPARENT);
1011 }
1012
1013 void wxDC::DoDrawRotatedText(const wxString& text,
1014 wxCoord x, wxCoord y,
1015 double angle)
1016 {
1017 #ifdef __WXMICROWIN__
1018 if (!GetHDC()) return;
1019 #endif
1020
1021 // we test that we have some font because otherwise we should still use the
1022 // "else" part below to avoid that DrawRotatedText(angle = 180) and
1023 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
1024 // font for drawing rotated fonts unfortunately)
1025 if ( (angle == 0.0) && m_font.Ok() )
1026 {
1027 DoDrawText(text, x, y);
1028 }
1029 #ifndef __WXMICROWIN__
1030 else
1031 {
1032 // NB: don't take DEFAULT_GUI_FONT (a.k.a. wxSYS_DEFAULT_GUI_FONT)
1033 // because it's not TrueType and so can't have non zero
1034 // orientation/escapement under Win9x
1035 wxFont font = m_font.Ok() ? m_font : *wxSWISS_FONT;
1036 HFONT hfont = (HFONT)font.GetResourceHandle();
1037 LOGFONT lf;
1038 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
1039 {
1040 wxLogLastError(wxT("GetObject(hfont)"));
1041 }
1042
1043 // GDI wants the angle in tenth of degree
1044 long angle10 = (long)(angle * 10);
1045 lf.lfEscapement = angle10;
1046 lf. lfOrientation = angle10;
1047
1048 hfont = ::CreateFontIndirect(&lf);
1049 if ( !hfont )
1050 {
1051 wxLogLastError(wxT("CreateFont"));
1052 }
1053 else
1054 {
1055 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
1056
1057 DrawAnyText(text, x, y);
1058
1059 (void)::SelectObject(GetHdc(), hfontOld);
1060 (void)::DeleteObject(hfont);
1061 }
1062
1063 // call the bounding box by adding all four vertices of the rectangle
1064 // containing the text to it (simpler and probably not slower than
1065 // determining which of them is really topmost/leftmost/...)
1066 wxCoord w, h;
1067 GetTextExtent(text, &w, &h);
1068
1069 double rad = DegToRad(angle);
1070
1071 // "upper left" and "upper right"
1072 CalcBoundingBox(x, y);
1073 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
1074
1075 // "bottom left" and "bottom right"
1076 x += (wxCoord)(h*sin(rad));
1077 y += (wxCoord)(h*cos(rad));
1078 CalcBoundingBox(x, y);
1079 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
1080 }
1081 #endif
1082 }
1083
1084 // ---------------------------------------------------------------------------
1085 // set GDI objects
1086 // ---------------------------------------------------------------------------
1087
1088 #if wxUSE_PALETTE
1089
1090 void wxDC::SetPalette(const wxPalette& palette)
1091 {
1092 #ifdef __WXMICROWIN__
1093 if (!GetHDC()) return;
1094 #endif
1095
1096 // Set the old object temporarily, in case the assignment deletes an object
1097 // that's not yet selected out.
1098 if (m_oldPalette)
1099 {
1100 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, FALSE);
1101 m_oldPalette = 0;
1102 }
1103
1104 m_palette = palette;
1105
1106 if (!m_palette.Ok())
1107 {
1108 // Setting a NULL colourmap is a way of restoring
1109 // the original colourmap
1110 if (m_oldPalette)
1111 {
1112 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, FALSE);
1113 m_oldPalette = 0;
1114 }
1115
1116 return;
1117 }
1118
1119 if (m_palette.Ok() && m_palette.GetHPALETTE())
1120 {
1121 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), FALSE);
1122 if (!m_oldPalette)
1123 m_oldPalette = (WXHPALETTE) oldPal;
1124
1125 ::RealizePalette(GetHdc());
1126 }
1127 }
1128
1129 #endif // wxUSE_PALETTE
1130
1131 void wxDC::SetFont(const wxFont& the_font)
1132 {
1133 #ifdef __WXMICROWIN__
1134 if (!GetHDC()) return;
1135 #endif
1136
1137 // Set the old object temporarily, in case the assignment deletes an object
1138 // that's not yet selected out.
1139 if (m_oldFont)
1140 {
1141 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
1142 m_oldFont = 0;
1143 }
1144
1145 m_font = the_font;
1146
1147 if (!the_font.Ok())
1148 {
1149 if (m_oldFont)
1150 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
1151 m_oldFont = 0;
1152 }
1153
1154 if (m_font.Ok() && m_font.GetResourceHandle())
1155 {
1156 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
1157 if (f == (HFONT) NULL)
1158 {
1159 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
1160 }
1161 if (!m_oldFont)
1162 m_oldFont = (WXHFONT) f;
1163 }
1164 }
1165
1166 void wxDC::SetPen(const wxPen& pen)
1167 {
1168 #ifdef __WXMICROWIN__
1169 if (!GetHDC()) return;
1170 #endif
1171
1172 // Set the old object temporarily, in case the assignment deletes an object
1173 // that's not yet selected out.
1174 if (m_oldPen)
1175 {
1176 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
1177 m_oldPen = 0;
1178 }
1179
1180 m_pen = pen;
1181
1182 if (!m_pen.Ok())
1183 {
1184 if (m_oldPen)
1185 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
1186 m_oldPen = 0;
1187 }
1188
1189 if (m_pen.Ok())
1190 {
1191 if (m_pen.GetResourceHandle())
1192 {
1193 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
1194 if (!m_oldPen)
1195 m_oldPen = (WXHPEN) p;
1196 }
1197 }
1198 }
1199
1200 void wxDC::SetBrush(const wxBrush& brush)
1201 {
1202 #ifdef __WXMICROWIN__
1203 if (!GetHDC()) return;
1204 #endif
1205
1206 // Set the old object temporarily, in case the assignment deletes an object
1207 // that's not yet selected out.
1208 if (m_oldBrush)
1209 {
1210 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
1211 m_oldBrush = 0;
1212 }
1213
1214 m_brush = brush;
1215
1216 if (!m_brush.Ok())
1217 {
1218 if (m_oldBrush)
1219 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
1220 m_oldBrush = 0;
1221 }
1222
1223 if (m_brush.Ok())
1224 {
1225 // to make sure the brush is alligned with the logical coordinates
1226 wxBitmap *stipple = m_brush.GetStipple();
1227 if ( stipple && stipple->Ok() )
1228 {
1229 #ifdef __WIN32__
1230 ::SetBrushOrgEx(GetHdc(),
1231 m_deviceOriginX % stipple->GetWidth(),
1232 m_deviceOriginY % stipple->GetHeight(),
1233 NULL); // don't need previous brush origin
1234 #else
1235 ::SetBrushOrg(GetHdc(),
1236 m_deviceOriginX % stipple->GetWidth(),
1237 m_deviceOriginY % stipple->GetHeight());
1238 #endif
1239 }
1240
1241 if ( m_brush.GetResourceHandle() )
1242 {
1243 HBRUSH b = 0;
1244 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
1245 if (!m_oldBrush)
1246 m_oldBrush = (WXHBRUSH) b;
1247 }
1248 }
1249 }
1250
1251 void wxDC::SetBackground(const wxBrush& brush)
1252 {
1253 #ifdef __WXMICROWIN__
1254 if (!GetHDC()) return;
1255 #endif
1256
1257 m_backgroundBrush = brush;
1258
1259 if (!m_backgroundBrush.Ok())
1260 return;
1261
1262 if (m_canvas)
1263 {
1264 bool customColours = TRUE;
1265 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
1266 // change background colours from the control-panel specified colours.
1267 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
1268 customColours = FALSE;
1269
1270 if (customColours)
1271 {
1272 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
1273 {
1274 m_canvas->SetTransparent(TRUE);
1275 }
1276 else
1277 {
1278 // New behaviour, 10/2/99: setting the background brush of a DC
1279 // doesn't affect the window background colour. However,
1280 // I'm leaving in the transparency setting because it's needed by
1281 // various controls (e.g. wxStaticText) to determine whether to draw
1282 // transparently or not. TODO: maybe this should be a new function
1283 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
1284 // parent?
1285 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
1286 m_canvas->SetTransparent(FALSE);
1287 }
1288 }
1289 }
1290 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
1291 {
1292 (void)SetBkColor(GetHdc(), new_color);
1293 }
1294 }
1295
1296 void wxDC::SetBackgroundMode(int mode)
1297 {
1298 #ifdef __WXMICROWIN__
1299 if (!GetHDC()) return;
1300 #endif
1301
1302 m_backgroundMode = mode;
1303
1304 // SetBackgroundColour now only refers to text background
1305 // and m_backgroundMode is used there
1306
1307 /*
1308 if (m_backgroundMode == wxTRANSPARENT)
1309 ::SetBkMode(GetHdc(), TRANSPARENT);
1310 else
1311 ::SetBkMode(GetHdc(), OPAQUE);
1312 Last change: AC 29 Jan 101 8:54 pm
1313 */
1314 }
1315
1316 void wxDC::SetLogicalFunction(int function)
1317 {
1318 #ifdef __WXMICROWIN__
1319 if (!GetHDC()) return;
1320 #endif
1321
1322 m_logicalFunction = function;
1323
1324 SetRop(m_hDC);
1325 }
1326
1327 void wxDC::SetRop(WXHDC dc)
1328 {
1329 if ( !dc || m_logicalFunction < 0 )
1330 return;
1331
1332 int rop;
1333
1334 switch (m_logicalFunction)
1335 {
1336 case wxCLEAR: rop = R2_BLACK; break;
1337 case wxXOR: rop = R2_XORPEN; break;
1338 case wxINVERT: rop = R2_NOT; break;
1339 case wxOR_REVERSE: rop = R2_MERGEPENNOT; break;
1340 case wxAND_REVERSE: rop = R2_MASKPENNOT; break;
1341 case wxCOPY: rop = R2_COPYPEN; break;
1342 case wxAND: rop = R2_MASKPEN; break;
1343 case wxAND_INVERT: rop = R2_MASKNOTPEN; break;
1344 case wxNO_OP: rop = R2_NOP; break;
1345 case wxNOR: rop = R2_NOTMERGEPEN; break;
1346 case wxEQUIV: rop = R2_NOTXORPEN; break;
1347 case wxSRC_INVERT: rop = R2_NOTCOPYPEN; break;
1348 case wxOR_INVERT: rop = R2_MERGENOTPEN; break;
1349 case wxNAND: rop = R2_NOTMASKPEN; break;
1350 case wxOR: rop = R2_MERGEPEN; break;
1351 case wxSET: rop = R2_WHITE; break;
1352
1353 default:
1354 wxFAIL_MSG( wxT("unsupported logical function") );
1355 return;
1356 }
1357
1358 SetROP2(GetHdc(), rop);
1359 }
1360
1361 bool wxDC::StartDoc(const wxString& WXUNUSED(message))
1362 {
1363 // We might be previewing, so return TRUE to let it continue.
1364 return TRUE;
1365 }
1366
1367 void wxDC::EndDoc()
1368 {
1369 }
1370
1371 void wxDC::StartPage()
1372 {
1373 }
1374
1375 void wxDC::EndPage()
1376 {
1377 }
1378
1379 // ---------------------------------------------------------------------------
1380 // text metrics
1381 // ---------------------------------------------------------------------------
1382
1383 wxCoord wxDC::GetCharHeight() const
1384 {
1385 #ifdef __WXMICROWIN__
1386 if (!GetHDC()) return 0;
1387 #endif
1388
1389 TEXTMETRIC lpTextMetric;
1390
1391 GetTextMetrics(GetHdc(), &lpTextMetric);
1392
1393 return YDEV2LOGREL(lpTextMetric.tmHeight);
1394 }
1395
1396 wxCoord wxDC::GetCharWidth() const
1397 {
1398 #ifdef __WXMICROWIN__
1399 if (!GetHDC()) return 0;
1400 #endif
1401
1402 TEXTMETRIC lpTextMetric;
1403
1404 GetTextMetrics(GetHdc(), &lpTextMetric);
1405
1406 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1407 }
1408
1409 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1410 wxCoord *descent, wxCoord *externalLeading,
1411 wxFont *font) const
1412 {
1413 #ifdef __WXMICROWIN__
1414 if (!GetHDC())
1415 {
1416 if (x) *x = 0;
1417 if (y) *y = 0;
1418 if (descent) *descent = 0;
1419 if (externalLeading) *externalLeading = 0;
1420 return;
1421 }
1422 #endif
1423
1424 HFONT hfontOld;
1425 if ( font )
1426 {
1427 wxASSERT_MSG( font->Ok(), _T("invalid font in wxDC::GetTextExtent") );
1428
1429 hfontOld = (HFONT)::SelectObject(GetHdc(), GetHfontOf(*font));
1430 }
1431 else // don't change the font
1432 {
1433 hfontOld = 0;
1434 }
1435
1436 SIZE sizeRect;
1437 TEXTMETRIC tm;
1438
1439 GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
1440 GetTextMetrics(GetHdc(), &tm);
1441
1442 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1443 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1444 if (descent) *descent = tm.tmDescent;
1445 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1446
1447 if ( hfontOld )
1448 {
1449 ::SelectObject(GetHdc(), hfontOld);
1450 }
1451 }
1452
1453 void wxDC::SetMapMode(int mode)
1454 {
1455 #ifdef __WXMICROWIN__
1456 if (!GetHDC()) return;
1457 #endif
1458
1459 m_mappingMode = mode;
1460
1461 int pixel_width = 0;
1462 int pixel_height = 0;
1463 int mm_width = 0;
1464 int mm_height = 0;
1465
1466 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1467 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1468 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1469 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1470
1471 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1472 {
1473 return;
1474 }
1475
1476 double mm2pixelsX = pixel_width/mm_width;
1477 double mm2pixelsY = pixel_height/mm_height;
1478
1479 switch (mode)
1480 {
1481 case wxMM_TWIPS:
1482 {
1483 m_logicalScaleX = (twips2mm * mm2pixelsX);
1484 m_logicalScaleY = (twips2mm * mm2pixelsY);
1485 break;
1486 }
1487 case wxMM_POINTS:
1488 {
1489 m_logicalScaleX = (pt2mm * mm2pixelsX);
1490 m_logicalScaleY = (pt2mm * mm2pixelsY);
1491 break;
1492 }
1493 case wxMM_METRIC:
1494 {
1495 m_logicalScaleX = mm2pixelsX;
1496 m_logicalScaleY = mm2pixelsY;
1497 break;
1498 }
1499 case wxMM_LOMETRIC:
1500 {
1501 m_logicalScaleX = (mm2pixelsX/10.0);
1502 m_logicalScaleY = (mm2pixelsY/10.0);
1503 break;
1504 }
1505 default:
1506 case wxMM_TEXT:
1507 {
1508 m_logicalScaleX = 1.0;
1509 m_logicalScaleY = 1.0;
1510 break;
1511 }
1512 }
1513
1514 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1515 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1516
1517 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1518 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1519 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1520 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1521 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1522 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1523 }
1524
1525 void wxDC::SetUserScale(double x, double y)
1526 {
1527 #ifdef __WXMICROWIN__
1528 if (!GetHDC()) return;
1529 #endif
1530
1531 m_userScaleX = x;
1532 m_userScaleY = y;
1533
1534 SetMapMode(m_mappingMode);
1535 }
1536
1537 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1538 {
1539 #ifdef __WXMICROWIN__
1540 if (!GetHDC()) return;
1541 #endif
1542
1543 m_signX = xLeftRight ? 1 : -1;
1544 m_signY = yBottomUp ? -1 : 1;
1545
1546 SetMapMode(m_mappingMode);
1547 }
1548
1549 void wxDC::SetSystemScale(double x, double y)
1550 {
1551 #ifdef __WXMICROWIN__
1552 if (!GetHDC()) return;
1553 #endif
1554
1555 m_scaleX = x;
1556 m_scaleY = y;
1557
1558 SetMapMode(m_mappingMode);
1559 }
1560
1561 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1562 {
1563 #ifdef __WXMICROWIN__
1564 if (!GetHDC()) return;
1565 #endif
1566
1567 m_logicalOriginX = x;
1568 m_logicalOriginY = y;
1569
1570 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1571 }
1572
1573 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1574 {
1575 #ifdef __WXMICROWIN__
1576 if (!GetHDC()) return;
1577 #endif
1578
1579 m_deviceOriginX = x;
1580 m_deviceOriginY = y;
1581
1582 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1583 }
1584
1585 // ---------------------------------------------------------------------------
1586 // coordinates transformations
1587 // ---------------------------------------------------------------------------
1588
1589 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1590 {
1591 double xRel = x - m_deviceOriginX;
1592 xRel /= m_logicalScaleX*m_userScaleX*m_signX*m_scaleX;
1593 return (wxCoord)(xRel + m_logicalOriginX);
1594 }
1595
1596 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1597 {
1598 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1599 }
1600
1601 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1602 {
1603 double yRel = y - m_deviceOriginY;
1604 yRel /= m_logicalScaleY*m_userScaleY*m_signY*m_scaleY;
1605 return (wxCoord)(yRel + m_logicalOriginY);
1606 }
1607
1608 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1609 {
1610 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1611 }
1612
1613 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1614 {
1615 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1616 }
1617
1618 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1619 {
1620 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1621 }
1622
1623 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1624 {
1625 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1626 }
1627
1628 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1629 {
1630 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1631 }
1632
1633 // ---------------------------------------------------------------------------
1634 // bit blit
1635 // ---------------------------------------------------------------------------
1636
1637 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1638 wxCoord width, wxCoord height,
1639 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1640 int rop, bool useMask,
1641 wxCoord xsrcMask, wxCoord ysrcMask)
1642 {
1643 #ifdef __WXMICROWIN__
1644 if (!GetHDC()) return FALSE;
1645 #endif
1646
1647 wxMask *mask = NULL;
1648 if ( useMask )
1649 {
1650 const wxBitmap& bmp = source->m_selectedBitmap;
1651 mask = bmp.GetMask();
1652
1653 if ( !(bmp.Ok() && mask && mask->GetMaskBitmap()) )
1654 {
1655 // don't give assert here because this would break existing
1656 // programs - just silently ignore useMask parameter
1657 useMask = FALSE;
1658 }
1659 }
1660
1661 if (xsrcMask == -1 && ysrcMask == -1)
1662 {
1663 xsrcMask = xsrc; ysrcMask = ysrc;
1664 }
1665
1666 COLORREF old_textground = ::GetTextColor(GetHdc());
1667 COLORREF old_background = ::GetBkColor(GetHdc());
1668 if (m_textForegroundColour.Ok())
1669 {
1670 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1671 }
1672 if (m_textBackgroundColour.Ok())
1673 {
1674 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1675 }
1676
1677 DWORD dwRop = SRCCOPY;
1678 switch (rop)
1679 {
1680 case wxXOR: dwRop = SRCINVERT; break;
1681 case wxINVERT: dwRop = DSTINVERT; break;
1682 case wxOR_REVERSE: dwRop = 0x00DD0228; break;
1683 case wxAND_REVERSE: dwRop = SRCERASE; break;
1684 case wxCLEAR: dwRop = BLACKNESS; break;
1685 case wxSET: dwRop = WHITENESS; break;
1686 case wxOR_INVERT: dwRop = MERGEPAINT; break;
1687 case wxAND: dwRop = SRCAND; break;
1688 case wxOR: dwRop = SRCPAINT; break;
1689 case wxEQUIV: dwRop = 0x00990066; break;
1690 case wxNAND: dwRop = 0x007700E6; break;
1691 case wxAND_INVERT: dwRop = 0x00220326; break;
1692 case wxCOPY: dwRop = SRCCOPY; break;
1693 case wxNO_OP: dwRop = DSTCOPY; break;
1694 case wxSRC_INVERT: dwRop = NOTSRCCOPY; break;
1695 case wxNOR: dwRop = NOTSRCCOPY; break;
1696 default:
1697 wxFAIL_MSG( wxT("unsupported logical function") );
1698 return FALSE;
1699 }
1700
1701 bool success = FALSE;
1702
1703 if (useMask)
1704 {
1705 #ifdef __WIN32__
1706 // we want the part of the image corresponding to the mask to be
1707 // transparent, so use "DSTCOPY" ROP for the mask points (the usual
1708 // meaning of fg and bg is inverted which corresponds to wxWin notion
1709 // of the mask which is also contrary to the Windows one)
1710
1711 // On some systems, MaskBlt succeeds yet is much much slower
1712 // than the wxWindows fall-back implementation. So we need
1713 // to be able to switch this on and off at runtime.
1714 #if wxUSE_SYSTEM_OPTIONS
1715 if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
1716 #endif
1717 {
1718 success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
1719 GetHdcOf(*source), xsrc, ysrc,
1720 (HBITMAP)mask->GetMaskBitmap(), xsrcMask, ysrcMask,
1721 MAKEROP4(dwRop, DSTCOPY)) != 0;
1722 }
1723
1724 if ( !success )
1725 #endif // Win32
1726 {
1727 // Blit bitmap with mask
1728 HDC dc_mask ;
1729 HDC dc_buffer ;
1730 HBITMAP buffer_bmap ;
1731
1732 #if wxUSE_DC_CACHEING
1733 // create a temp buffer bitmap and DCs to access it and the mask
1734 wxDCCacheEntry* dcCacheEntry1 = FindDCInCache(NULL, source->GetHDC());
1735 dc_mask = (HDC) dcCacheEntry1->m_dc;
1736
1737 wxDCCacheEntry* dcCacheEntry2 = FindDCInCache(dcCacheEntry1, GetHDC());
1738 dc_buffer = (HDC) dcCacheEntry2->m_dc;
1739
1740 wxDCCacheEntry* bitmapCacheEntry = FindBitmapInCache(GetHDC(),
1741 width, height);
1742
1743 buffer_bmap = (HBITMAP) bitmapCacheEntry->m_bitmap;
1744 #else // !wxUSE_DC_CACHEING
1745 // create a temp buffer bitmap and DCs to access it and the mask
1746 dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
1747 dc_buffer = ::CreateCompatibleDC(GetHdc());
1748 buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1749 #endif // wxUSE_DC_CACHEING/!wxUSE_DC_CACHEING
1750 ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
1751 ::SelectObject(dc_buffer, buffer_bmap);
1752
1753 // copy dest to buffer
1754 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1755 GetHdc(), xdest, ydest, SRCCOPY) )
1756 {
1757 wxLogLastError(wxT("BitBlt"));
1758 }
1759
1760 // copy src to buffer using selected raster op
1761 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1762 GetHdcOf(*source), xsrc, ysrc, dwRop) )
1763 {
1764 wxLogLastError(wxT("BitBlt"));
1765 }
1766
1767 // set masked area in buffer to BLACK (pixel value 0)
1768 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1769 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1770 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1771 dc_mask, xsrcMask, ysrcMask, SRCAND) )
1772 {
1773 wxLogLastError(wxT("BitBlt"));
1774 }
1775
1776 // set unmasked area in dest to BLACK
1777 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1778 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1779 if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height,
1780 dc_mask, xsrcMask, ysrcMask, SRCAND) )
1781 {
1782 wxLogLastError(wxT("BitBlt"));
1783 }
1784 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1785 ::SetTextColor(GetHdc(), prevCol);
1786
1787 // OR buffer to dest
1788 success = ::BitBlt(GetHdc(), xdest, ydest,
1789 (int)width, (int)height,
1790 dc_buffer, 0, 0, SRCPAINT) != 0;
1791 if ( !success )
1792 {
1793 wxLogLastError(wxT("BitBlt"));
1794 }
1795
1796 // tidy up temporary DCs and bitmap
1797 ::SelectObject(dc_mask, 0);
1798 ::SelectObject(dc_buffer, 0);
1799
1800 #if !wxUSE_DC_CACHEING
1801 {
1802 ::DeleteDC(dc_mask);
1803 ::DeleteDC(dc_buffer);
1804 ::DeleteObject(buffer_bmap);
1805 }
1806 #endif
1807 }
1808 }
1809 else // no mask, just BitBlt() it
1810 {
1811 success = ::BitBlt(GetHdc(), xdest, ydest,
1812 (int)width, (int)height,
1813 GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
1814 if ( !success )
1815 {
1816 wxLogLastError(wxT("BitBlt"));
1817 }
1818 }
1819 ::SetTextColor(GetHdc(), old_textground);
1820 ::SetBkColor(GetHdc(), old_background);
1821
1822 return success;
1823 }
1824
1825 void wxDC::DoGetSize(int *w, int *h) const
1826 {
1827 #ifdef __WXMICROWIN__
1828 if (!GetHDC()) return;
1829 #endif
1830
1831 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1832 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1833 }
1834
1835 void wxDC::DoGetSizeMM(int *w, int *h) const
1836 {
1837 #ifdef __WXMICROWIN__
1838 if (!GetHDC()) return;
1839 #endif
1840
1841 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1842 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1843 }
1844
1845 wxSize wxDC::GetPPI() const
1846 {
1847 #ifdef __WXMICROWIN__
1848 if (!GetHDC()) return wxSize();
1849 #endif
1850
1851 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1852 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1853
1854 return wxSize(x, y);
1855 }
1856
1857 // For use by wxWindows only, unless custom units are required.
1858 void wxDC::SetLogicalScale(double x, double y)
1859 {
1860 #ifdef __WXMICROWIN__
1861 if (!GetHDC()) return;
1862 #endif
1863
1864 m_logicalScaleX = x;
1865 m_logicalScaleY = y;
1866 }
1867
1868 #if WXWIN_COMPATIBILITY
1869 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1870 float *descent, float *externalLeading,
1871 wxFont *theFont, bool use16bit) const
1872 {
1873 #ifdef __WXMICROWIN__
1874 if (!GetHDC()) return;
1875 #endif
1876
1877 wxCoord x1, y1, descent1, externalLeading1;
1878 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1879 *x = x1; *y = y1;
1880 if (descent)
1881 *descent = descent1;
1882 if (externalLeading)
1883 *externalLeading = externalLeading1;
1884 }
1885 #endif
1886
1887 #if wxUSE_DC_CACHEING
1888
1889 /*
1890 * This implementation is a bit ugly and uses the old-fashioned wxList class, so I will
1891 * improve it in due course, either using arrays, or simply storing pointers to one
1892 * entry for the bitmap, and two for the DCs. -- JACS
1893 */
1894
1895 wxList wxDC::sm_bitmapCache;
1896 wxList wxDC::sm_dcCache;
1897
1898 wxDCCacheEntry::wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth)
1899 {
1900 m_bitmap = hBitmap;
1901 m_dc = 0;
1902 m_width = w;
1903 m_height = h;
1904 m_depth = depth;
1905 }
1906
1907 wxDCCacheEntry::wxDCCacheEntry(WXHDC hDC, int depth)
1908 {
1909 m_bitmap = 0;
1910 m_dc = hDC;
1911 m_width = 0;
1912 m_height = 0;
1913 m_depth = depth;
1914 }
1915
1916 wxDCCacheEntry::~wxDCCacheEntry()
1917 {
1918 if (m_bitmap)
1919 ::DeleteObject((HBITMAP) m_bitmap);
1920 if (m_dc)
1921 ::DeleteDC((HDC) m_dc);
1922 }
1923
1924 wxDCCacheEntry* wxDC::FindBitmapInCache(WXHDC dc, int w, int h)
1925 {
1926 int depth = ::GetDeviceCaps((HDC) dc, PLANES) * ::GetDeviceCaps((HDC) dc, BITSPIXEL);
1927 wxNode* node = sm_bitmapCache.First();
1928 while (node)
1929 {
1930 wxDCCacheEntry* entry = (wxDCCacheEntry*) node->Data();
1931
1932 if (entry->m_depth == depth)
1933 {
1934 if (entry->m_width < w || entry->m_height < h)
1935 {
1936 ::DeleteObject((HBITMAP) entry->m_bitmap);
1937 entry->m_bitmap = (WXHBITMAP) ::CreateCompatibleBitmap((HDC) dc, w, h);
1938 if ( !entry->m_bitmap)
1939 {
1940 wxLogLastError(wxT("CreateCompatibleBitmap"));
1941 }
1942 entry->m_width = w; entry->m_height = h;
1943 return entry;
1944 }
1945 return entry;
1946 }
1947
1948 node = node->Next();
1949 }
1950 WXHBITMAP hBitmap = (WXHBITMAP) ::CreateCompatibleBitmap((HDC) dc, w, h);
1951 if ( !hBitmap)
1952 {
1953 wxLogLastError(wxT("CreateCompatibleBitmap"));
1954 }
1955 wxDCCacheEntry* entry = new wxDCCacheEntry(hBitmap, w, h, depth);
1956 AddToBitmapCache(entry);
1957 return entry;
1958 }
1959
1960 wxDCCacheEntry* wxDC::FindDCInCache(wxDCCacheEntry* notThis, WXHDC dc)
1961 {
1962 int depth = ::GetDeviceCaps((HDC) dc, PLANES) * ::GetDeviceCaps((HDC) dc, BITSPIXEL);
1963 wxNode* node = sm_dcCache.First();
1964 while (node)
1965 {
1966 wxDCCacheEntry* entry = (wxDCCacheEntry*) node->Data();
1967
1968 // Don't return the same one as we already have
1969 if (!notThis || (notThis != entry))
1970 {
1971 if (entry->m_depth == depth)
1972 {
1973 return entry;
1974 }
1975 }
1976
1977 node = node->Next();
1978 }
1979 WXHDC hDC = (WXHDC) ::CreateCompatibleDC((HDC) dc);
1980 if ( !hDC)
1981 {
1982 wxLogLastError(wxT("CreateCompatibleDC"));
1983 }
1984 wxDCCacheEntry* entry = new wxDCCacheEntry(hDC, depth);
1985 AddToDCCache(entry);
1986 return entry;
1987 }
1988
1989 void wxDC::AddToBitmapCache(wxDCCacheEntry* entry)
1990 {
1991 sm_bitmapCache.Append(entry);
1992 }
1993
1994 void wxDC::AddToDCCache(wxDCCacheEntry* entry)
1995 {
1996 sm_dcCache.Append(entry);
1997 }
1998
1999 void wxDC::ClearCache()
2000 {
2001 sm_bitmapCache.DeleteContents(TRUE);
2002 sm_bitmapCache.Clear();
2003 sm_bitmapCache.DeleteContents(FALSE);
2004 sm_dcCache.DeleteContents(TRUE);
2005 sm_dcCache.Clear();
2006 sm_dcCache.DeleteContents(FALSE);
2007 }
2008
2009 // Clean up cache at app exit
2010 class wxDCModule : public wxModule
2011 {
2012 public:
2013 virtual bool OnInit() { return TRUE; }
2014 virtual void OnExit() { wxDC::ClearCache(); }
2015
2016 private:
2017 DECLARE_DYNAMIC_CLASS(wxDCModule)
2018 };
2019
2020 IMPLEMENT_DYNAMIC_CLASS(wxDCModule, wxModule)
2021
2022 #endif
2023 // wxUSE_DC_CACHEING
2024
wxWidgets (Impactor)