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[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/dcprint.h"
44
45 #include <string.h>
46 #include <math.h>
47
48 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
49
50 #if wxUSE_COMMON_DIALOGS
51 #if wxUSE_NORLANDER_HEADERS
52 #include <windows.h>
53 #endif
54 #include <commdlg.h>
55 #endif
56
57 #ifndef __WIN32__
58 #include <print.h>
59 #endif
60
61 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
62
63 // ---------------------------------------------------------------------------
64 // constants
65 // ---------------------------------------------------------------------------
66
67 static const int VIEWPORT_EXTENT = 1000;
68
69 static const int MM_POINTS = 9;
70 static const int MM_METRIC = 10;
71
72 // usually this is defined in math.h
73 #ifndef M_PI
74 static const double M_PI = 3.14159265358979323846;
75 #endif // M_PI
76
77 // ---------------------------------------------------------------------------
78 // private functions
79 // ---------------------------------------------------------------------------
80
81 // convert degrees to radians
82 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
83
84 // ===========================================================================
85 // implementation
86 // ===========================================================================
87
88 // ---------------------------------------------------------------------------
89 // wxDC
90 // ---------------------------------------------------------------------------
91
92 // Default constructor
93 wxDC::wxDC()
94 {
95 m_canvas = NULL;
96
97 m_oldBitmap = 0;
98 m_oldPen = 0;
99 m_oldBrush = 0;
100 m_oldFont = 0;
101 m_oldPalette = 0;
102
103 m_bOwnsDC = FALSE;
104 m_hDC = 0;
105
106 m_windowExtX = VIEWPORT_EXTENT;
107 m_windowExtY = VIEWPORT_EXTENT;
108
109 m_hDCCount = 0;
110 }
111
112
113 wxDC::~wxDC()
114 {
115 if ( m_hDC != 0 ) {
116 SelectOldObjects(m_hDC);
117 if ( m_bOwnsDC ) {
118 if ( m_canvas == NULL )
119 ::DeleteDC(GetHdc());
120 else
121 ::ReleaseDC((HWND)m_canvas->GetHWND(), GetHdc());
122 }
123 }
124
125 }
126
127 // This will select current objects out of the DC,
128 // which is what you have to do before deleting the
129 // DC.
130 void wxDC::SelectOldObjects(WXHDC dc)
131 {
132 if (dc)
133 {
134 if (m_oldBitmap)
135 {
136 ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
137 if (m_selectedBitmap.Ok())
138 {
139 m_selectedBitmap.SetSelectedInto(NULL);
140 }
141 }
142 m_oldBitmap = 0;
143 if (m_oldPen)
144 {
145 ::SelectObject((HDC) dc, (HPEN) m_oldPen);
146 }
147 m_oldPen = 0;
148 if (m_oldBrush)
149 {
150 ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
151 }
152 m_oldBrush = 0;
153 if (m_oldFont)
154 {
155 ::SelectObject((HDC) dc, (HFONT) m_oldFont);
156 }
157 m_oldFont = 0;
158 if (m_oldPalette)
159 {
160 ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE);
161 }
162 m_oldPalette = 0;
163 }
164
165 m_brush = wxNullBrush;
166 m_pen = wxNullPen;
167 m_palette = wxNullPalette;
168 m_font = wxNullFont;
169 m_backgroundBrush = wxNullBrush;
170 m_selectedBitmap = wxNullBitmap;
171 }
172
173 // ---------------------------------------------------------------------------
174 // clipping
175 // ---------------------------------------------------------------------------
176
177 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
178 {
179 m_clipping = TRUE;
180 m_clipX1 = (int)cx;
181 m_clipY1 = (int)cy;
182 m_clipX2 = (int)(cx + cw);
183 m_clipY2 = (int)(cy + ch);
184
185 DoClipping((WXHDC) m_hDC);
186 }
187
188 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
189 {
190 wxCHECK_RET( region.GetHRGN(), wxT("invalid clipping region") );
191
192 wxRect box = region.GetBox();
193
194 m_clipping = TRUE;
195 m_clipX1 = box.x;
196 m_clipY1 = box.y;
197 m_clipX2 = box.x + box.width;
198 m_clipY2 = box.y + box.height;
199
200 #ifdef __WIN16__
201 SelectClipRgn(GetHdc(), (HRGN) region.GetHRGN());
202 #else
203 ExtSelectClipRgn(GetHdc(), (HRGN) region.GetHRGN(), RGN_AND);
204 #endif
205 }
206
207 void wxDC::DoClipping(WXHDC dc)
208 {
209 if (m_clipping && dc)
210 {
211 IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1), YLOG2DEV(m_clipY1),
212 XLOG2DEV(m_clipX2), YLOG2DEV(m_clipY2));
213 }
214 }
215
216 void wxDC::DestroyClippingRegion()
217 {
218 if (m_clipping && m_hDC)
219 {
220 // TODO: this should restore the previous clipping region,
221 // so that OnPaint processing works correctly, and the update clipping region
222 // doesn't get destroyed after the first DestroyClippingRegion.
223 HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
224 SelectClipRgn(GetHdc(), rgn);
225 DeleteObject(rgn);
226 }
227 m_clipping = FALSE;
228 }
229
230 // ---------------------------------------------------------------------------
231 // query capabilities
232 // ---------------------------------------------------------------------------
233
234 bool wxDC::CanDrawBitmap() const
235 {
236 return TRUE;
237 }
238
239 bool wxDC::CanGetTextExtent() const
240 {
241 // What sort of display is it?
242 int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
243
244 return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
245 }
246
247 int wxDC::GetDepth() const
248 {
249 return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
250 }
251
252 // ---------------------------------------------------------------------------
253 // drawing
254 // ---------------------------------------------------------------------------
255
256 void wxDC::Clear()
257 {
258 RECT rect;
259 if ( m_canvas )
260 {
261 GetClientRect((HWND) m_canvas->GetHWND(), &rect);
262 }
263 else
264 {
265 // No, I think we should simply ignore this if printing on e.g.
266 // a printer DC.
267 // wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") );
268 if (!m_selectedBitmap.Ok())
269 return;
270
271 rect.left = 0; rect.top = 0;
272 rect.right = m_selectedBitmap.GetWidth();
273 rect.bottom = m_selectedBitmap.GetHeight();
274 }
275
276 (void) ::SetMapMode(GetHdc(), MM_TEXT);
277
278 DWORD colour = GetBkColor(GetHdc());
279 HBRUSH brush = CreateSolidBrush(colour);
280 FillRect(GetHdc(), &rect, brush);
281 DeleteObject(brush);
282
283 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
284 ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
285 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
286 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
287 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
288 }
289
290 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
291 {
292 if ( !::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
293 col.GetPixel(),
294 style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
295 : FLOODFILLBORDER) )
296 {
297 // quoting from the MSDN docs:
298 //
299 // Following are some of the reasons this function might fail:
300 //
301 // * The filling could not be completed.
302 // * The specified point has the boundary color specified by the
303 // crColor parameter (if FLOODFILLBORDER was requested).
304 // * The specified point does not have the color specified by
305 // crColor (if FLOODFILLSURFACE was requested)
306 // * The point is outside the clipping region that is, it is not
307 // visible on the device.
308 //
309 wxLogLastError("ExtFloodFill");
310 }
311
312 CalcBoundingBox(x, y);
313 }
314
315 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
316 {
317 // get the color of the pixel
318 COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
319
320 // get the color of the pen
321 COLORREF pencolor = 0x00ffffff;
322 if (m_pen.Ok())
323 {
324 pencolor = m_pen.GetColour().GetPixel();
325 }
326
327 // return the color of the pixel
328 if( col )
329 {
330 col->Set(GetRValue(pixelcolor),
331 GetGValue(pixelcolor),
332 GetBValue(pixelcolor));
333 }
334
335 // check, if color of the pixels is the same as the color of the current
336 // pen and return TRUE if it is, FALSE otherwise
337 return pixelcolor == pencolor;
338 }
339
340 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
341 {
342 wxCoord x1 = x-VIEWPORT_EXTENT;
343 wxCoord y1 = y-VIEWPORT_EXTENT;
344 wxCoord x2 = x+VIEWPORT_EXTENT;
345 wxCoord y2 = y+VIEWPORT_EXTENT;
346
347 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
348 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
349
350 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
351 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
352
353 CalcBoundingBox(x1, y1);
354 CalcBoundingBox(x2, y2);
355 }
356
357 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
358 {
359 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
360 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
361
362 /* MATTHEW: [6] New normalization */
363 #if WX_STANDARD_GRAPHICS
364 (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
365 #endif
366
367 CalcBoundingBox(x1, y1);
368 CalcBoundingBox(x2, y2);
369 }
370
371 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
372 {
373 double dx = xc-x1;
374 double dy = yc-y1;
375 double radius = (double)sqrt(dx*dx+dy*dy) ;;
376 if (x1==x2 && x2==y2)
377 {
378 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
379 return;
380 }
381
382 wxCoord xx1 = XLOG2DEV(x1);
383 wxCoord yy1 = YLOG2DEV(y1);
384 wxCoord xx2 = XLOG2DEV(x2);
385 wxCoord yy2 = YLOG2DEV(y2);
386 wxCoord xxc = XLOG2DEV(xc);
387 wxCoord yyc = YLOG2DEV(yc);
388 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
389
390 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
391 wxCoord xxx1 = (wxCoord) (xxc-ray);
392 wxCoord yyy1 = (wxCoord) (yyc-ray);
393 wxCoord xxx2 = (wxCoord) (xxc+ray);
394 wxCoord yyy2 = (wxCoord) (yyc+ray);
395 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
396 {
397 // Have to add 1 to bottom-right corner of rectangle
398 // to make semi-circles look right (crooked line otherwise).
399 // Unfortunately this is not a reliable method, depends
400 // on the size of shape.
401 // TODO: figure out why this happens!
402 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
403 xx1,yy1,xx2,yy2);
404 }
405 else
406 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
407 xx1,yy1,xx2,yy2);
408
409 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
410 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
411 }
412
413 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
414 {
415 COLORREF color = 0x00ffffff;
416 if (m_pen.Ok())
417 {
418 color = m_pen.GetColour().GetPixel();
419 }
420
421 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
422
423 CalcBoundingBox(x, y);
424 }
425
426 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
427 {
428 COLORREF old_textground = ::GetTextColor(GetHdc());
429 COLORREF old_background = ::GetBkColor(GetHdc());
430 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
431 {
432
433 if (m_textForegroundColour.Ok())
434 { //just the oposite from what is expected see help on pattern brush
435 // 1 in mask becomes bk color
436 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel() );
437 }
438 if (m_textBackgroundColour.Ok())
439 { //just the oposite from what is expected
440 // 0 in mask becomes text color
441 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel() );
442 }
443
444 if (m_backgroundMode == wxTRANSPARENT)
445 SetBkMode(GetHdc(), TRANSPARENT);
446 else
447 SetBkMode(GetHdc(), OPAQUE);
448 }
449
450 // Do things less efficiently if we have offsets
451 if (xoffset != 0 || yoffset != 0)
452 {
453 POINT *cpoints = new POINT[n];
454 int i;
455 for (i = 0; i < n; i++)
456 {
457 cpoints[i].x = (int)(points[i].x + xoffset);
458 cpoints[i].y = (int)(points[i].y + yoffset);
459
460 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
461 }
462 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
463 (void)Polygon(GetHdc(), cpoints, n);
464 SetPolyFillMode(GetHdc(),prev);
465 delete[] cpoints;
466 }
467 else
468 {
469 int i;
470 for (i = 0; i < n; i++)
471 CalcBoundingBox(points[i].x, points[i].y);
472
473 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
474 (void)Polygon(GetHdc(), (POINT*) points, n);
475 SetPolyFillMode(GetHdc(),prev);
476 }
477
478 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
479 {
480 ::SetBkMode(GetHdc(), TRANSPARENT);
481 ::SetTextColor(GetHdc(), old_textground);
482 ::SetBkColor(GetHdc(), old_background);
483 }
484 }
485
486 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
487 {
488 // Do things less efficiently if we have offsets
489 if (xoffset != 0 || yoffset != 0)
490 {
491 POINT *cpoints = new POINT[n];
492 int i;
493 for (i = 0; i < n; i++)
494 {
495 cpoints[i].x = (int)(points[i].x + xoffset);
496 cpoints[i].y = (int)(points[i].y + yoffset);
497
498 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
499 }
500 (void)Polyline(GetHdc(), cpoints, n);
501 delete[] cpoints;
502 }
503 else
504 {
505 int i;
506 for (i = 0; i < n; i++)
507 CalcBoundingBox(points[i].x, points[i].y);
508
509 (void)Polyline(GetHdc(), (POINT*) points, n);
510 }
511 }
512
513 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
514 {
515 COLORREF colFgOld = 0,
516 colBgOld = 0;
517
518 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
519 {
520 colFgOld = ::GetTextColor(GetHdc());
521 colBgOld = ::GetBkColor(GetHdc());
522
523 if ( m_textForegroundColour.Ok() )
524 {
525 // just the oposite from what is expected see help on pattern brush
526 // 1 in mask becomes bk color
527 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel());
528 }
529
530 if ( m_textBackgroundColour.Ok() )
531 {
532 // 0 in mask becomes text color
533 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel());
534 }
535
536 // VZ: IMHO this does strictly nothing here
537 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
538 : OPAQUE);
539 }
540
541 wxCoord x2 = x + width;
542 wxCoord y2 = y + height;
543
544 // Windows draws the filled rectangles without outline (i.e. drawn with a
545 // transparent pen) one pixel smaller in both directions and we want them
546 // to have the same size regardless of which pen is used - adjust
547 if ( m_pen.GetStyle() == wxTRANSPARENT )
548 {
549 x2++;
550 y2++;
551 }
552
553 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
554
555 CalcBoundingBox(x, y);
556 CalcBoundingBox(x2, y2);
557
558 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
559 {
560 // restore the colours we changed
561 ::SetBkMode(GetHdc(), TRANSPARENT);
562 ::SetTextColor(GetHdc(), colFgOld);
563 ::SetBkColor(GetHdc(), colBgOld);
564 }
565 }
566
567 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
568 {
569 // Now, a negative radius value is interpreted to mean
570 // 'the proportion of the smallest X or Y dimension'
571
572 if (radius < 0.0)
573 {
574 double smallest = 0.0;
575 if (width < height)
576 smallest = width;
577 else
578 smallest = height;
579 radius = (- radius * smallest);
580 }
581
582 wxCoord x2 = (x+width);
583 wxCoord y2 = (y+height);
584
585 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
586 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
587
588 CalcBoundingBox(x, y);
589 CalcBoundingBox(x2, y2);
590 }
591
592 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
593 {
594 wxCoord x2 = (x+width);
595 wxCoord y2 = (y+height);
596
597 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
598
599 CalcBoundingBox(x, y);
600 CalcBoundingBox(x2, y2);
601 }
602
603 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
604 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
605 {
606 wxCoord x2 = (x+w);
607 wxCoord y2 = (y+h);
608
609 int rx1 = XLOG2DEV(x+w/2);
610 int ry1 = YLOG2DEV(y+h/2);
611 int rx2 = rx1;
612 int ry2 = ry1;
613
614 sa = DegToRad(sa);
615 ea = DegToRad(ea);
616
617 rx1 += (int)(100.0 * abs(w) * cos(sa));
618 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
619 rx2 += (int)(100.0 * abs(w) * cos(ea));
620 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
621
622 // draw pie with NULL_PEN first and then outline otherwise a line is
623 // drawn from the start and end points to the centre
624 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
625 if (m_signY > 0)
626 {
627 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
628 rx1, ry1, rx2, ry2);
629 }
630 else
631 {
632 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
633 rx1, ry1-1, rx2, ry2-1);
634 }
635 ::SelectObject(GetHdc(), orig_pen);
636 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
637 rx1, ry1, rx2, ry2);
638
639 CalcBoundingBox(x, y);
640 CalcBoundingBox(x2, y2);
641 }
642
643 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
644 {
645 wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
646
647 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon));
648
649 CalcBoundingBox(x, y);
650 CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
651 }
652
653 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
654 {
655 wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
656
657 int width = bmp.GetWidth(),
658 height = bmp.GetHeight();
659
660 if ( !useMask )
661 {
662 HDC cdc = GetHdc();
663 HDC memdc = ::CreateCompatibleDC( cdc );
664 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
665
666 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
667
668 COLORREF old_textground = ::GetTextColor(GetHdc());
669 COLORREF old_background = ::GetBkColor(GetHdc());
670 if (m_textForegroundColour.Ok())
671 {
672 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
673 }
674 if (m_textBackgroundColour.Ok())
675 {
676 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
677 }
678
679 ::SelectObject( memdc, hbitmap );
680 ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
681 ::DeleteDC( memdc );
682
683 ::SetTextColor(GetHdc(), old_textground);
684 ::SetBkColor(GetHdc(), old_background);
685 }
686 else
687 {
688 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API level
689 wxMemoryDC memDC;
690 memDC.SelectObject(bmp);
691
692 Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
693
694 memDC.SelectObject(wxNullBitmap);
695 }
696 }
697
698 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
699 {
700 DrawAnyText(text, x, y);
701
702 // update the bounding box
703 CalcBoundingBox(x, y);
704
705 wxCoord w, h;
706 GetTextExtent(text, &w, &h);
707 CalcBoundingBox(x + w, y + h);
708 }
709
710 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
711 {
712 // prepare for drawing the text
713 if ( m_textForegroundColour.Ok() )
714 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
715
716 DWORD old_background = 0;
717 if ( m_textBackgroundColour.Ok() )
718 {
719 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
720 }
721
722 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
723 : OPAQUE);
724
725 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
726 text.c_str(), text.length()) == 0 )
727 {
728 wxLogLastError("TextOut");
729 }
730
731 // restore the old parameters (text foreground colour may be left because
732 // it never is set to anything else, but background should remain
733 // transparent even if we just drew an opaque string)
734 if ( m_textBackgroundColour.Ok() )
735 (void)SetBkColor(GetHdc(), old_background);
736
737 SetBkMode(GetHdc(), TRANSPARENT);
738 }
739
740 void wxDC::DoDrawRotatedText(const wxString& text,
741 wxCoord x, wxCoord y,
742 double angle)
743 {
744 // we test that we have some font because otherwise we should still use the
745 // "else" part below to avoid that DrawRotatedText(angle = 180) and
746 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
747 // font for drawing rotated fonts unfortunately)
748 if ( (angle == 0.0) && m_font.Ok() )
749 {
750 DoDrawText(text, x, y);
751 }
752 else
753 {
754 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
755 // can't have non zero orientation/escapement
756 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
757 HFONT hfont = (HFONT)font.GetResourceHandle();
758 LOGFONT lf;
759 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
760 {
761 wxLogLastError("GetObject(hfont)");
762 }
763
764 // GDI wants the angle in tenth of degree
765 long angle10 = (long)(angle * 10);
766 lf.lfEscapement = angle10;
767 lf. lfOrientation = angle10;
768
769 hfont = ::CreateFontIndirect(&lf);
770 if ( !hfont )
771 {
772 wxLogLastError("CreateFont");
773 }
774 else
775 {
776 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
777
778 DrawAnyText(text, x, y);
779
780 (void)::SelectObject(GetHdc(), hfontOld);
781 (void)::DeleteObject(hfont);
782 }
783
784 // call the bounding box by adding all four vertices of the rectangle
785 // containing the text to it (simpler and probably not slower than
786 // determining which of them is really topmost/leftmost/...)
787 wxCoord w, h;
788 GetTextExtent(text, &w, &h);
789
790 double rad = DegToRad(angle);
791
792 // "upper left" and "upper right"
793 CalcBoundingBox(x, y);
794 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
795
796 // "bottom left" and "bottom right"
797 x += (wxCoord)(h*sin(rad));
798 y += (wxCoord)(h*cos(rad));
799 CalcBoundingBox(x, y);
800 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
801 }
802 }
803
804 // ---------------------------------------------------------------------------
805 // set GDI objects
806 // ---------------------------------------------------------------------------
807
808 void wxDC::SetPalette(const wxPalette& palette)
809 {
810 // Set the old object temporarily, in case the assignment deletes an object
811 // that's not yet selected out.
812 if (m_oldPalette)
813 {
814 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
815 m_oldPalette = 0;
816 }
817
818 m_palette = palette;
819
820 if (!m_palette.Ok())
821 {
822 // Setting a NULL colourmap is a way of restoring
823 // the original colourmap
824 if (m_oldPalette)
825 {
826 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
827 m_oldPalette = 0;
828 }
829
830 return;
831 }
832
833 if (m_palette.Ok() && m_palette.GetHPALETTE())
834 {
835 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
836 if (!m_oldPalette)
837 m_oldPalette = (WXHPALETTE) oldPal;
838
839 ::RealizePalette(GetHdc());
840 }
841 }
842
843 void wxDC::SetFont(const wxFont& the_font)
844 {
845 // Set the old object temporarily, in case the assignment deletes an object
846 // that's not yet selected out.
847 if (m_oldFont)
848 {
849 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
850 m_oldFont = 0;
851 }
852
853 m_font = the_font;
854
855 if (!the_font.Ok())
856 {
857 if (m_oldFont)
858 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
859 m_oldFont = 0;
860 }
861
862 if (m_font.Ok() && m_font.GetResourceHandle())
863 {
864 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
865 if (f == (HFONT) NULL)
866 {
867 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
868 }
869 if (!m_oldFont)
870 m_oldFont = (WXHFONT) f;
871 }
872 }
873
874 void wxDC::SetPen(const wxPen& pen)
875 {
876 // Set the old object temporarily, in case the assignment deletes an object
877 // that's not yet selected out.
878 if (m_oldPen)
879 {
880 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
881 m_oldPen = 0;
882 }
883
884 m_pen = pen;
885
886 if (!m_pen.Ok())
887 {
888 if (m_oldPen)
889 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
890 m_oldPen = 0;
891 }
892
893 if (m_pen.Ok())
894 {
895 if (m_pen.GetResourceHandle())
896 {
897 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
898 if (!m_oldPen)
899 m_oldPen = (WXHPEN) p;
900 }
901 }
902 }
903
904 void wxDC::SetBrush(const wxBrush& brush)
905 {
906 // Set the old object temporarily, in case the assignment deletes an object
907 // that's not yet selected out.
908 if (m_oldBrush)
909 {
910 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
911 m_oldBrush = 0;
912 }
913
914 m_brush = brush;
915
916 if (!m_brush.Ok())
917 {
918 if (m_oldBrush)
919 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
920 m_oldBrush = 0;
921 }
922
923 if (m_brush.Ok())
924 {
925 if (m_brush.GetResourceHandle())
926 {
927 HBRUSH b = 0;
928 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
929 if (!m_oldBrush)
930 m_oldBrush = (WXHBRUSH) b;
931 }
932 }
933 }
934
935 void wxDC::SetBackground(const wxBrush& brush)
936 {
937 m_backgroundBrush = brush;
938
939 if (!m_backgroundBrush.Ok())
940 return;
941
942 if (m_canvas)
943 {
944 bool customColours = TRUE;
945 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
946 // change background colours from the control-panel specified colours.
947 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
948 customColours = FALSE;
949
950 if (customColours)
951 {
952 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
953 {
954 m_canvas->SetTransparent(TRUE);
955 }
956 else
957 {
958 // New behaviour, 10/2/99: setting the background brush of a DC
959 // doesn't affect the window background colour. However,
960 // I'm leaving in the transparency setting because it's needed by
961 // various controls (e.g. wxStaticText) to determine whether to draw
962 // transparently or not. TODO: maybe this should be a new function
963 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
964 // parent?
965 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
966 m_canvas->SetTransparent(FALSE);
967 }
968 }
969 }
970 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
971 {
972 (void)SetBkColor(GetHdc(), new_color);
973 }
974 }
975
976 void wxDC::SetBackgroundMode(int mode)
977 {
978 m_backgroundMode = mode;
979
980 // SetBackgroundColour now only refers to text background
981 // and m_backgroundMode is used there
982
983 /*
984 if (m_backgroundMode == wxTRANSPARENT)
985 ::SetBkMode(GetHdc(), TRANSPARENT);
986 else
987 ::SetBkMode(GetHdc(), OPAQUE);
988 */
989 }
990
991 void wxDC::SetLogicalFunction(int function)
992 {
993 m_logicalFunction = function;
994
995 SetRop((WXHDC) m_hDC);
996 }
997
998 void wxDC::SetRop(WXHDC dc)
999 {
1000 if (!dc || m_logicalFunction < 0)
1001 return;
1002
1003 int c_rop;
1004
1005 // These may be wrong
1006 switch (m_logicalFunction)
1007 {
1008 // case wxXOR: c_rop = R2_XORPEN; break;
1009 case wxXOR: c_rop = R2_NOTXORPEN; break;
1010 case wxINVERT: c_rop = R2_NOT; break;
1011 case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break;
1012 case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break;
1013 case wxCLEAR: c_rop = R2_WHITE; break;
1014 case wxSET: c_rop = R2_BLACK; break;
1015 case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break;
1016 case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break;
1017 case wxAND: c_rop = R2_MASKPEN; break;
1018 case wxOR: c_rop = R2_MERGEPEN; break;
1019 case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break;
1020 case wxEQUIV:
1021 case wxNAND:
1022 case wxCOPY:
1023
1024 #if 0
1025 // these probably wouldn't be wrong, RR
1026
1027 case wxXOR: c_rop = R2_XORPEN; break;
1028 case wxINVERT: c_rop = R2_NOT; break;
1029 case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break;
1030 case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break;
1031 case wxCLEAR: c_rop = R2_BLACK; break;
1032 case wxSET: c_rop = R2_WHITE; break;
1033 case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break;
1034 case wxAND: c_rop = R2_MASKPEN; break;
1035 case wxOR: c_rop = R2_MERGEPEN; break;
1036 case wxEQUIV: c_rop = R2_NOTXORPEN; break;
1037 case wxNAND: c_rop = R2_NOTMASKPEN; break;
1038 case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break;
1039 case wxCOPY: c_rop = R2_COPYPEN; break;
1040 case wxNO_OP: c_rop = R2_NOP; break;
1041 case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break;
1042
1043 // what is this one?
1044 case wxNOR: c_rop = R2_COPYPEN; break;
1045
1046 // these are actually ternary ROPs
1047 case wxSRC_AND: c_rop = R2_MASKPEN; break;
1048 case wxSRC_OR: c_rop = R2_MERGEPEN; break;
1049 #endif
1050
1051 default:
1052 c_rop = R2_COPYPEN; break;
1053 }
1054 SetROP2((HDC) dc, c_rop);
1055 }
1056
1057 bool wxDC::StartDoc(const wxString& message)
1058 {
1059 // We might be previewing, so return TRUE to let it continue.
1060 return TRUE;
1061 }
1062
1063 void wxDC::EndDoc()
1064 {
1065 }
1066
1067 void wxDC::StartPage()
1068 {
1069 }
1070
1071 void wxDC::EndPage()
1072 {
1073 }
1074
1075 // ---------------------------------------------------------------------------
1076 // text metrics
1077 // ---------------------------------------------------------------------------
1078
1079 wxCoord wxDC::GetCharHeight() const
1080 {
1081 TEXTMETRIC lpTextMetric;
1082
1083 GetTextMetrics(GetHdc(), &lpTextMetric);
1084
1085 return YDEV2LOGREL(lpTextMetric.tmHeight);
1086 }
1087
1088 wxCoord wxDC::GetCharWidth() const
1089 {
1090 TEXTMETRIC lpTextMetric;
1091
1092 GetTextMetrics(GetHdc(), &lpTextMetric);
1093
1094 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1095 }
1096
1097 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1098 wxCoord *descent, wxCoord *externalLeading,
1099 wxFont *theFont) const
1100 {
1101 wxFont *fontToUse = (wxFont*) theFont;
1102 if (!fontToUse)
1103 fontToUse = (wxFont*) &m_font;
1104
1105 SIZE sizeRect;
1106 TEXTMETRIC tm;
1107
1108 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1109 GetTextMetrics(GetHdc(), &tm);
1110
1111 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1112 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1113 if (descent) *descent = tm.tmDescent;
1114 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1115 }
1116
1117 void wxDC::SetMapMode(int mode)
1118 {
1119 m_mappingMode = mode;
1120
1121 int pixel_width = 0;
1122 int pixel_height = 0;
1123 int mm_width = 0;
1124 int mm_height = 0;
1125
1126 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1127 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1128 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1129 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1130
1131 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1132 {
1133 return;
1134 }
1135
1136 double mm2pixelsX = pixel_width/mm_width;
1137 double mm2pixelsY = pixel_height/mm_height;
1138
1139 switch (mode)
1140 {
1141 case wxMM_TWIPS:
1142 {
1143 m_logicalScaleX = (twips2mm * mm2pixelsX);
1144 m_logicalScaleY = (twips2mm * mm2pixelsY);
1145 break;
1146 }
1147 case wxMM_POINTS:
1148 {
1149 m_logicalScaleX = (pt2mm * mm2pixelsX);
1150 m_logicalScaleY = (pt2mm * mm2pixelsY);
1151 break;
1152 }
1153 case wxMM_METRIC:
1154 {
1155 m_logicalScaleX = mm2pixelsX;
1156 m_logicalScaleY = mm2pixelsY;
1157 break;
1158 }
1159 case wxMM_LOMETRIC:
1160 {
1161 m_logicalScaleX = (mm2pixelsX/10.0);
1162 m_logicalScaleY = (mm2pixelsY/10.0);
1163 break;
1164 }
1165 default:
1166 case wxMM_TEXT:
1167 {
1168 m_logicalScaleX = 1.0;
1169 m_logicalScaleY = 1.0;
1170 break;
1171 }
1172 }
1173
1174 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1175 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1176
1177 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1178 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1179 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1180 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1181 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1182 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1183 }
1184
1185 void wxDC::SetUserScale(double x, double y)
1186 {
1187 m_userScaleX = x;
1188 m_userScaleY = y;
1189
1190 SetMapMode(m_mappingMode);
1191 }
1192
1193 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1194 {
1195 m_signX = xLeftRight ? 1 : -1;
1196 m_signY = yBottomUp ? -1 : 1;
1197
1198 SetMapMode(m_mappingMode);
1199 }
1200
1201 void wxDC::SetSystemScale(double x, double y)
1202 {
1203 m_scaleX = x;
1204 m_scaleY = y;
1205
1206 SetMapMode(m_mappingMode);
1207 }
1208
1209 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1210 {
1211 m_logicalOriginX = x;
1212 m_logicalOriginY = y;
1213
1214 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1215 }
1216
1217 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1218 {
1219 m_deviceOriginX = x;
1220 m_deviceOriginY = y;
1221
1222 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1223 }
1224
1225 // ---------------------------------------------------------------------------
1226 // coordinates transformations
1227 // ---------------------------------------------------------------------------
1228
1229 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1230 {
1231 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1232 }
1233
1234 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1235 {
1236 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1237 }
1238
1239 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1240 {
1241 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1242 }
1243
1244 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1245 {
1246 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1247 }
1248
1249 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1250 {
1251 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1252 }
1253
1254 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1255 {
1256 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1257 }
1258
1259 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1260 {
1261 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1262 }
1263
1264 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1265 {
1266 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1267 }
1268
1269 // ---------------------------------------------------------------------------
1270 // bit blit
1271 // ---------------------------------------------------------------------------
1272
1273 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1274 wxCoord width, wxCoord height,
1275 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1276 int rop, bool useMask)
1277 {
1278 wxMask *mask = NULL;
1279 if ( useMask )
1280 {
1281 const wxBitmap& bmp = source->m_selectedBitmap;
1282 mask = bmp.GetMask();
1283
1284 if ( !(bmp.Ok() && mask && mask->GetMaskBitmap()) )
1285 {
1286 // don't give assert here because this would break existing
1287 // programs - just silently ignore useMask parameter
1288 useMask = FALSE;
1289 }
1290 }
1291
1292 COLORREF old_textground = ::GetTextColor(GetHdc());
1293 COLORREF old_background = ::GetBkColor(GetHdc());
1294 if (m_textForegroundColour.Ok())
1295 {
1296 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1297 }
1298 if (m_textBackgroundColour.Ok())
1299 {
1300 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1301 }
1302
1303 DWORD dwRop = rop == wxCOPY ? SRCCOPY :
1304 rop == wxCLEAR ? WHITENESS :
1305 rop == wxSET ? BLACKNESS :
1306 rop == wxINVERT ? DSTINVERT :
1307 rop == wxAND ? MERGECOPY :
1308 rop == wxOR ? MERGEPAINT :
1309 rop == wxSRC_INVERT ? NOTSRCCOPY :
1310 rop == wxXOR ? SRCINVERT :
1311 rop == wxOR_REVERSE ? MERGEPAINT :
1312 rop == wxAND_REVERSE ? SRCERASE :
1313 rop == wxSRC_OR ? SRCPAINT :
1314 rop == wxSRC_AND ? SRCAND :
1315 SRCCOPY;
1316
1317 bool success;
1318
1319 if (useMask)
1320 {
1321 #ifdef __WIN32__
1322 HBITMAP hbmpMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
1323
1324 // we want the part of the image corresponding to the mask to be
1325 // transparent, i.e. do PATCOPY there and apply dwRop elsewhere
1326 const wxColour& colBg = m_backgroundBrush.GetColour();
1327 HBRUSH hbrBg = (HBRUSH)::CreateSolidBrush(wxColourToRGB(colBg));
1328 HBRUSH hbrOld = (HBRUSH)::SelectObject(GetHdc(), hbrBg);
1329
1330 success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
1331 GetHdcOf(*source), xsrc, ysrc,
1332 hbmpMask, 0, 0,
1333 MAKEROP4(PATCOPY, dwRop)) != 0;
1334
1335 (void)::SelectObject(GetHdc(), hbrOld);
1336 ::DeleteObject(hbrOld);
1337 ::DeleteObject(hbmpMask);
1338
1339 if ( !success )
1340 #endif // Win32
1341 {
1342 // Blit bitmap with mask
1343
1344 // create a temp buffer bitmap and DCs to access it and the mask
1345 HDC dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
1346 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1347 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1348 ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
1349 ::SelectObject(dc_buffer, buffer_bmap);
1350
1351 // copy dest to buffer
1352 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1353 GetHdc(), xdest, ydest, SRCCOPY) )
1354 {
1355 wxLogLastError("BitBlt");
1356 }
1357
1358 // copy src to buffer using selected raster op
1359 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1360 GetHdcOf(*source), xsrc, ysrc, dwRop) )
1361 {
1362 wxLogLastError("BitBlt");
1363 }
1364
1365 // set masked area in buffer to BLACK (pixel value 0)
1366 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1367 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1368 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1369 dc_mask, xsrc, ysrc, SRCAND) )
1370 {
1371 wxLogLastError("BitBlt");
1372 }
1373
1374 // set unmasked area in dest to BLACK
1375 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1376 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1377 if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height,
1378 dc_mask, xsrc, ysrc, SRCAND) )
1379 {
1380 wxLogLastError("BitBlt");
1381 }
1382 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1383 ::SetTextColor(GetHdc(), prevCol);
1384
1385 // OR buffer to dest
1386 success = ::BitBlt(GetHdc(), xdest, ydest,
1387 (int)width, (int)height,
1388 dc_buffer, 0, 0, SRCPAINT) != 0;
1389 if ( !success )
1390 {
1391 wxLogLastError("BitBlt");
1392 }
1393
1394 // tidy up temporary DCs and bitmap
1395 ::SelectObject(dc_mask, 0);
1396 ::DeleteDC(dc_mask);
1397 ::SelectObject(dc_buffer, 0);
1398 ::DeleteDC(dc_buffer);
1399 ::DeleteObject(buffer_bmap);
1400 }
1401 }
1402 else // no mask, just BitBlt() it
1403 {
1404 success = ::BitBlt(GetHdc(), xdest, ydest,
1405 (int)width, (int)height,
1406 GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
1407 if ( !success )
1408 {
1409 wxLogLastError("BitBlt");
1410 }
1411 }
1412 ::SetTextColor(GetHdc(), old_textground);
1413 ::SetBkColor(GetHdc(), old_background);
1414
1415 return success;
1416 }
1417
1418 void wxDC::DoGetSize(int *w, int *h) const
1419 {
1420 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1421 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1422 }
1423
1424 void wxDC::DoGetSizeMM(int *w, int *h) const
1425 {
1426 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1427 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1428 }
1429
1430 wxSize wxDC::GetPPI() const
1431 {
1432 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1433 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1434
1435 return wxSize(x, y);
1436 }
1437
1438 // For use by wxWindows only, unless custom units are required.
1439 void wxDC::SetLogicalScale(double x, double y)
1440 {
1441 m_logicalScaleX = x;
1442 m_logicalScaleY = y;
1443 }
1444
1445 #if WXWIN_COMPATIBILITY
1446 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1447 float *descent, float *externalLeading,
1448 wxFont *theFont, bool use16bit) const
1449 {
1450 wxCoord x1, y1, descent1, externalLeading1;
1451 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1452 *x = x1; *y = y1;
1453 if (descent)
1454 *descent = descent1;
1455 if (externalLeading)
1456 *externalLeading = externalLeading1;
1457 }
1458 #endif
1459
1460 // ---------------------------------------------------------------------------
1461 // spline drawing code
1462 // ---------------------------------------------------------------------------
1463
1464 #if wxUSE_SPLINES
1465
1466 class wxSpline: public wxObject
1467 {
1468 public:
1469 int type;
1470 wxList *points;
1471
1472 wxSpline(wxList *list);
1473 void DeletePoints();
1474
1475 // Doesn't delete points
1476 ~wxSpline();
1477 };
1478
1479 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1480
1481 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1482 double a3, double b3, double a4, double b4);
1483 void wx_clear_stack();
1484 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1485 double *y3, double *x4, double *y4);
1486 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1487 double x4, double y4);
1488 static bool wx_spline_add_point(double x, double y);
1489 static void wx_spline_draw_point_array(wxDC *dc);
1490 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1491
1492 void wxDC::DoDrawSpline(wxList *list)
1493 {
1494 wxSpline spline(list);
1495
1496 wx_draw_open_spline(this, &spline);
1497 }
1498
1499 wxList wx_spline_point_list;
1500
1501 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1502 {
1503 wxPoint *p;
1504 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1505 double x1, y1, x2, y2;
1506
1507 wxNode *node = spline->points->First();
1508 p = (wxPoint *)node->Data();
1509
1510 x1 = p->x;
1511 y1 = p->y;
1512
1513 node = node->Next();
1514 p = (wxPoint *)node->Data();
1515
1516 x2 = p->x;
1517 y2 = p->y;
1518 cx1 = (double)((x1 + x2) / 2);
1519 cy1 = (double)((y1 + y2) / 2);
1520 cx2 = (double)((cx1 + x2) / 2);
1521 cy2 = (double)((cy1 + y2) / 2);
1522
1523 wx_spline_add_point(x1, y1);
1524
1525 while ((node = node->Next()) != NULL)
1526 {
1527 p = (wxPoint *)node->Data();
1528 x1 = x2;
1529 y1 = y2;
1530 x2 = p->x;
1531 y2 = p->y;
1532 cx4 = (double)(x1 + x2) / 2;
1533 cy4 = (double)(y1 + y2) / 2;
1534 cx3 = (double)(x1 + cx4) / 2;
1535 cy3 = (double)(y1 + cy4) / 2;
1536
1537 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1538
1539 cx1 = cx4;
1540 cy1 = cy4;
1541 cx2 = (double)(cx1 + x2) / 2;
1542 cy2 = (double)(cy1 + y2) / 2;
1543 }
1544
1545 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1546 wx_spline_add_point(x2, y2);
1547
1548 wx_spline_draw_point_array(dc);
1549
1550 }
1551
1552 /********************* CURVES FOR SPLINES *****************************
1553
1554 The following spline drawing routine is from
1555
1556 "An Algorithm for High-Speed Curve Generation"
1557 by George Merrill Chaikin,
1558 Computer Graphics and Image Processing, 3, Academic Press,
1559 1974, 346-349.
1560
1561 and
1562
1563 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1564 Computer Graphics and Image Processing, 4, Academic Press,
1565 1975, 304-310.
1566
1567 ***********************************************************************/
1568
1569 #define half(z1, z2) ((z1+z2)/2.0)
1570 #define THRESHOLD 5
1571
1572 /* iterative version */
1573
1574 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1575 double b4)
1576 {
1577 register double xmid, ymid;
1578 double x1, y1, x2, y2, x3, y3, x4, y4;
1579
1580 wx_clear_stack();
1581 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1582
1583 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1584 xmid = (double)half(x2, x3);
1585 ymid = (double)half(y2, y3);
1586 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1587 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1588 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1589 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1590 } else {
1591 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1592 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1593 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1594 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1595 }
1596 }
1597 }
1598
1599
1600 /* utilities used by spline drawing routines */
1601
1602
1603 typedef struct wx_spline_stack_struct {
1604 double x1, y1, x2, y2, x3, y3, x4, y4;
1605 }
1606 Stack;
1607
1608 #define SPLINE_STACK_DEPTH 20
1609 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1610 static Stack *wx_stack_top;
1611 static int wx_stack_count;
1612
1613 void wx_clear_stack()
1614 {
1615 wx_stack_top = wx_spline_stack;
1616 wx_stack_count = 0;
1617 }
1618
1619 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1620 {
1621 wx_stack_top->x1 = x1;
1622 wx_stack_top->y1 = y1;
1623 wx_stack_top->x2 = x2;
1624 wx_stack_top->y2 = y2;
1625 wx_stack_top->x3 = x3;
1626 wx_stack_top->y3 = y3;
1627 wx_stack_top->x4 = x4;
1628 wx_stack_top->y4 = y4;
1629 wx_stack_top++;
1630 wx_stack_count++;
1631 }
1632
1633 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1634 double *x3, double *y3, double *x4, double *y4)
1635 {
1636 if (wx_stack_count == 0)
1637 return (0);
1638 wx_stack_top--;
1639 wx_stack_count--;
1640 *x1 = wx_stack_top->x1;
1641 *y1 = wx_stack_top->y1;
1642 *x2 = wx_stack_top->x2;
1643 *y2 = wx_stack_top->y2;
1644 *x3 = wx_stack_top->x3;
1645 *y3 = wx_stack_top->y3;
1646 *x4 = wx_stack_top->x4;
1647 *y4 = wx_stack_top->y4;
1648 return (1);
1649 }
1650
1651 static bool wx_spline_add_point(double x, double y)
1652 {
1653 wxPoint *point = new wxPoint;
1654 point->x = (int) x;
1655 point->y = (int) y;
1656 wx_spline_point_list.Append((wxObject*)point);
1657 return TRUE;
1658 }
1659
1660 static void wx_spline_draw_point_array(wxDC *dc)
1661 {
1662 dc->DrawLines(&wx_spline_point_list, 0, 0);
1663 wxNode *node = wx_spline_point_list.First();
1664 while (node)
1665 {
1666 wxPoint *point = (wxPoint *)node->Data();
1667 delete point;
1668 delete node;
1669 node = wx_spline_point_list.First();
1670 }
1671 }
1672
1673 wxSpline::wxSpline(wxList *list)
1674 {
1675 points = list;
1676 }
1677
1678 wxSpline::~wxSpline()
1679 {
1680 }
1681
1682 void wxSpline::DeletePoints()
1683 {
1684 for(wxNode *node = points->First(); node; node = points->First())
1685 {
1686 wxPoint *point = (wxPoint *)node->Data();
1687 delete point;
1688 delete node;
1689 }
1690 delete points;
1691 }
1692
1693
1694 #endif // wxUSE_SPLINES
1695
wxWidgets (Impactor)