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Added wxTextFile functions to make multi-line text formatting portable.
[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 HBITMAP hbmpMask = 0;
661
662 if ( useMask )
663 {
664 wxMask *mask = bmp.GetMask();
665 if ( mask )
666 hbmpMask = (HBITMAP)mask->GetMaskBitmap();
667
668 if ( !hbmpMask )
669 {
670 // don't give assert here because this would break existing
671 // programs - just silently ignore useMask parameter
672 useMask = FALSE;
673 }
674 }
675
676 if ( useMask )
677 {
678 #ifdef __WIN32__
679 HDC hdcMem = ::CreateCompatibleDC(GetHdc());
680 ::SelectObject(hdcMem, GetHbitmapOf(bmp));
681
682 // this will only work if the transparent part of our bitmap is black
683 // because it is combined with the destination rectangle using OR, so
684 // it won't be really transparent otherwise - I don't know what to do
685 // about it, may be use MAKEROP4(SRCCOPY, DSTINVERT) twice? Or create a
686 // copy of the bitmap with the transparent part replaced with black
687 // pixels?
688 bool ok = ::MaskBlt(GetHdc(), x, y, width, height,
689 hdcMem, 0, 0,
690 hbmpMask, 0, 0,
691 MAKEROP4(SRCCOPY, SRCPAINT)) != 0;
692 ::DeleteDC(hdcMem);
693
694 if ( !ok )
695 #endif // Win32
696 {
697 // VZ: this is incorrect, Blit() doesn't (and can't) draw
698 // transparently, but it's still better than nothing at all
699
700 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API level
701 wxMemoryDC memDC;
702 memDC.SelectObject(bmp);
703
704 Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
705
706 memDC.SelectObject(wxNullBitmap);
707 }
708 }
709 else // no mask, just use BitBlt()
710 {
711 HDC cdc = GetHdc();
712 HDC memdc = ::CreateCompatibleDC( cdc );
713 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
714
715 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
716
717 COLORREF old_textground = ::GetTextColor(GetHdc());
718 COLORREF old_background = ::GetBkColor(GetHdc());
719 if (m_textForegroundColour.Ok())
720 {
721 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
722 }
723 if (m_textBackgroundColour.Ok())
724 {
725 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
726 }
727
728 ::SelectObject( memdc, hbitmap );
729 ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
730 ::DeleteDC( memdc );
731
732 ::SetTextColor(GetHdc(), old_textground);
733 ::SetBkColor(GetHdc(), old_background);
734 }
735 }
736
737 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
738 {
739 DrawAnyText(text, x, y);
740
741 // update the bounding box
742 CalcBoundingBox(x, y);
743
744 wxCoord w, h;
745 GetTextExtent(text, &w, &h);
746 CalcBoundingBox(x + w, y + h);
747 }
748
749 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
750 {
751 // prepare for drawing the text
752 if ( m_textForegroundColour.Ok() )
753 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
754
755 DWORD old_background = 0;
756 if ( m_textBackgroundColour.Ok() )
757 {
758 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
759 }
760
761 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
762 : OPAQUE);
763
764 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
765 text.c_str(), text.length()) == 0 )
766 {
767 wxLogLastError("TextOut");
768 }
769
770 // restore the old parameters (text foreground colour may be left because
771 // it never is set to anything else, but background should remain
772 // transparent even if we just drew an opaque string)
773 if ( m_textBackgroundColour.Ok() )
774 (void)SetBkColor(GetHdc(), old_background);
775
776 SetBkMode(GetHdc(), TRANSPARENT);
777 }
778
779 void wxDC::DoDrawRotatedText(const wxString& text,
780 wxCoord x, wxCoord y,
781 double angle)
782 {
783 // we test that we have some font because otherwise we should still use the
784 // "else" part below to avoid that DrawRotatedText(angle = 180) and
785 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
786 // font for drawing rotated fonts unfortunately)
787 if ( (angle == 0.0) && m_font.Ok() )
788 {
789 DoDrawText(text, x, y);
790 }
791 else
792 {
793 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
794 // can't have non zero orientation/escapement
795 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
796 HFONT hfont = (HFONT)font.GetResourceHandle();
797 LOGFONT lf;
798 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
799 {
800 wxLogLastError("GetObject(hfont)");
801 }
802
803 // GDI wants the angle in tenth of degree
804 long angle10 = (long)(angle * 10);
805 lf.lfEscapement = angle10;
806 lf. lfOrientation = angle10;
807
808 hfont = ::CreateFontIndirect(&lf);
809 if ( !hfont )
810 {
811 wxLogLastError("CreateFont");
812 }
813 else
814 {
815 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
816
817 DrawAnyText(text, x, y);
818
819 (void)::SelectObject(GetHdc(), hfontOld);
820 (void)::DeleteObject(hfont);
821 }
822
823 // call the bounding box by adding all four vertices of the rectangle
824 // containing the text to it (simpler and probably not slower than
825 // determining which of them is really topmost/leftmost/...)
826 wxCoord w, h;
827 GetTextExtent(text, &w, &h);
828
829 double rad = DegToRad(angle);
830
831 // "upper left" and "upper right"
832 CalcBoundingBox(x, y);
833 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
834
835 // "bottom left" and "bottom right"
836 x += (wxCoord)(h*sin(rad));
837 y += (wxCoord)(h*cos(rad));
838 CalcBoundingBox(x, y);
839 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
840 }
841 }
842
843 // ---------------------------------------------------------------------------
844 // set GDI objects
845 // ---------------------------------------------------------------------------
846
847 void wxDC::SetPalette(const wxPalette& palette)
848 {
849 // Set the old object temporarily, in case the assignment deletes an object
850 // that's not yet selected out.
851 if (m_oldPalette)
852 {
853 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
854 m_oldPalette = 0;
855 }
856
857 m_palette = palette;
858
859 if (!m_palette.Ok())
860 {
861 // Setting a NULL colourmap is a way of restoring
862 // the original colourmap
863 if (m_oldPalette)
864 {
865 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
866 m_oldPalette = 0;
867 }
868
869 return;
870 }
871
872 if (m_palette.Ok() && m_palette.GetHPALETTE())
873 {
874 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
875 if (!m_oldPalette)
876 m_oldPalette = (WXHPALETTE) oldPal;
877
878 ::RealizePalette(GetHdc());
879 }
880 }
881
882 void wxDC::SetFont(const wxFont& the_font)
883 {
884 // Set the old object temporarily, in case the assignment deletes an object
885 // that's not yet selected out.
886 if (m_oldFont)
887 {
888 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
889 m_oldFont = 0;
890 }
891
892 m_font = the_font;
893
894 if (!the_font.Ok())
895 {
896 if (m_oldFont)
897 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
898 m_oldFont = 0;
899 }
900
901 if (m_font.Ok() && m_font.GetResourceHandle())
902 {
903 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
904 if (f == (HFONT) NULL)
905 {
906 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
907 }
908 if (!m_oldFont)
909 m_oldFont = (WXHFONT) f;
910 }
911 }
912
913 void wxDC::SetPen(const wxPen& pen)
914 {
915 // Set the old object temporarily, in case the assignment deletes an object
916 // that's not yet selected out.
917 if (m_oldPen)
918 {
919 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
920 m_oldPen = 0;
921 }
922
923 m_pen = pen;
924
925 if (!m_pen.Ok())
926 {
927 if (m_oldPen)
928 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
929 m_oldPen = 0;
930 }
931
932 if (m_pen.Ok())
933 {
934 if (m_pen.GetResourceHandle())
935 {
936 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
937 if (!m_oldPen)
938 m_oldPen = (WXHPEN) p;
939 }
940 }
941 }
942
943 void wxDC::SetBrush(const wxBrush& brush)
944 {
945 // Set the old object temporarily, in case the assignment deletes an object
946 // that's not yet selected out.
947 if (m_oldBrush)
948 {
949 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
950 m_oldBrush = 0;
951 }
952
953 m_brush = brush;
954
955 if (!m_brush.Ok())
956 {
957 if (m_oldBrush)
958 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
959 m_oldBrush = 0;
960 }
961
962 if (m_brush.Ok())
963 {
964 if (m_brush.GetResourceHandle())
965 {
966 HBRUSH b = 0;
967 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
968 if (!m_oldBrush)
969 m_oldBrush = (WXHBRUSH) b;
970 }
971 }
972 }
973
974 void wxDC::SetBackground(const wxBrush& brush)
975 {
976 m_backgroundBrush = brush;
977
978 if (!m_backgroundBrush.Ok())
979 return;
980
981 if (m_canvas)
982 {
983 bool customColours = TRUE;
984 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
985 // change background colours from the control-panel specified colours.
986 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
987 customColours = FALSE;
988
989 if (customColours)
990 {
991 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
992 {
993 m_canvas->SetTransparent(TRUE);
994 }
995 else
996 {
997 // New behaviour, 10/2/99: setting the background brush of a DC
998 // doesn't affect the window background colour. However,
999 // I'm leaving in the transparency setting because it's needed by
1000 // various controls (e.g. wxStaticText) to determine whether to draw
1001 // transparently or not. TODO: maybe this should be a new function
1002 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
1003 // parent?
1004 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
1005 m_canvas->SetTransparent(FALSE);
1006 }
1007 }
1008 }
1009 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
1010 {
1011 (void)SetBkColor(GetHdc(), new_color);
1012 }
1013 }
1014
1015 void wxDC::SetBackgroundMode(int mode)
1016 {
1017 m_backgroundMode = mode;
1018
1019 // SetBackgroundColour now only refers to text background
1020 // and m_backgroundMode is used there
1021
1022 /*
1023 if (m_backgroundMode == wxTRANSPARENT)
1024 ::SetBkMode(GetHdc(), TRANSPARENT);
1025 else
1026 ::SetBkMode(GetHdc(), OPAQUE);
1027 */
1028 }
1029
1030 void wxDC::SetLogicalFunction(int function)
1031 {
1032 m_logicalFunction = function;
1033
1034 SetRop(m_hDC);
1035 }
1036
1037 void wxDC::SetRop(WXHDC dc)
1038 {
1039 if ( !dc || m_logicalFunction < 0 )
1040 return;
1041
1042 int rop;
1043
1044 switch (m_logicalFunction)
1045 {
1046 case wxXOR: rop = R2_XORPEN; break;
1047 case wxINVERT: rop = R2_NOT; break;
1048 case wxOR_REVERSE: rop = R2_MERGEPENNOT; break;
1049 case wxAND_REVERSE: rop = R2_MASKPENNOT; break;
1050 case wxCLEAR: rop = R2_WHITE; break;
1051 case wxSET: rop = R2_BLACK; break;
1052 case wxOR_INVERT: rop = R2_MERGENOTPEN; break;
1053 case wxAND: rop = R2_MASKPEN; break;
1054 case wxOR: rop = R2_MERGEPEN; break;
1055 case wxEQUIV: rop = R2_NOTXORPEN; break;
1056 case wxNAND: rop = R2_NOTMASKPEN; break;
1057 case wxAND_INVERT: rop = R2_MASKNOTPEN; break;
1058 case wxCOPY: rop = R2_COPYPEN; break;
1059 case wxNO_OP: rop = R2_NOP; break;
1060 case wxSRC_INVERT: rop = R2_NOTCOPYPEN; break;
1061 case wxNOR: rop = R2_NOTMERGEPEN; break;
1062 default:
1063 wxFAIL_MSG( wxT("unsupported logical function") );
1064 return;
1065 }
1066
1067 SetROP2(GetHdc(), rop);
1068 }
1069
1070 bool wxDC::StartDoc(const wxString& message)
1071 {
1072 // We might be previewing, so return TRUE to let it continue.
1073 return TRUE;
1074 }
1075
1076 void wxDC::EndDoc()
1077 {
1078 }
1079
1080 void wxDC::StartPage()
1081 {
1082 }
1083
1084 void wxDC::EndPage()
1085 {
1086 }
1087
1088 // ---------------------------------------------------------------------------
1089 // text metrics
1090 // ---------------------------------------------------------------------------
1091
1092 wxCoord wxDC::GetCharHeight() const
1093 {
1094 TEXTMETRIC lpTextMetric;
1095
1096 GetTextMetrics(GetHdc(), &lpTextMetric);
1097
1098 return YDEV2LOGREL(lpTextMetric.tmHeight);
1099 }
1100
1101 wxCoord wxDC::GetCharWidth() const
1102 {
1103 TEXTMETRIC lpTextMetric;
1104
1105 GetTextMetrics(GetHdc(), &lpTextMetric);
1106
1107 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1108 }
1109
1110 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1111 wxCoord *descent, wxCoord *externalLeading,
1112 wxFont *theFont) const
1113 {
1114 wxFont *fontToUse = (wxFont*) theFont;
1115 if (!fontToUse)
1116 fontToUse = (wxFont*) &m_font;
1117
1118 SIZE sizeRect;
1119 TEXTMETRIC tm;
1120
1121 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1122 GetTextMetrics(GetHdc(), &tm);
1123
1124 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1125 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1126 if (descent) *descent = tm.tmDescent;
1127 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1128 }
1129
1130 void wxDC::SetMapMode(int mode)
1131 {
1132 m_mappingMode = mode;
1133
1134 int pixel_width = 0;
1135 int pixel_height = 0;
1136 int mm_width = 0;
1137 int mm_height = 0;
1138
1139 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1140 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1141 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1142 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1143
1144 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1145 {
1146 return;
1147 }
1148
1149 double mm2pixelsX = pixel_width/mm_width;
1150 double mm2pixelsY = pixel_height/mm_height;
1151
1152 switch (mode)
1153 {
1154 case wxMM_TWIPS:
1155 {
1156 m_logicalScaleX = (twips2mm * mm2pixelsX);
1157 m_logicalScaleY = (twips2mm * mm2pixelsY);
1158 break;
1159 }
1160 case wxMM_POINTS:
1161 {
1162 m_logicalScaleX = (pt2mm * mm2pixelsX);
1163 m_logicalScaleY = (pt2mm * mm2pixelsY);
1164 break;
1165 }
1166 case wxMM_METRIC:
1167 {
1168 m_logicalScaleX = mm2pixelsX;
1169 m_logicalScaleY = mm2pixelsY;
1170 break;
1171 }
1172 case wxMM_LOMETRIC:
1173 {
1174 m_logicalScaleX = (mm2pixelsX/10.0);
1175 m_logicalScaleY = (mm2pixelsY/10.0);
1176 break;
1177 }
1178 default:
1179 case wxMM_TEXT:
1180 {
1181 m_logicalScaleX = 1.0;
1182 m_logicalScaleY = 1.0;
1183 break;
1184 }
1185 }
1186
1187 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1188 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1189
1190 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1191 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1192 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1193 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1194 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1195 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1196 }
1197
1198 void wxDC::SetUserScale(double x, double y)
1199 {
1200 m_userScaleX = x;
1201 m_userScaleY = y;
1202
1203 SetMapMode(m_mappingMode);
1204 }
1205
1206 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1207 {
1208 m_signX = xLeftRight ? 1 : -1;
1209 m_signY = yBottomUp ? -1 : 1;
1210
1211 SetMapMode(m_mappingMode);
1212 }
1213
1214 void wxDC::SetSystemScale(double x, double y)
1215 {
1216 m_scaleX = x;
1217 m_scaleY = y;
1218
1219 SetMapMode(m_mappingMode);
1220 }
1221
1222 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1223 {
1224 m_logicalOriginX = x;
1225 m_logicalOriginY = y;
1226
1227 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1228 }
1229
1230 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1231 {
1232 m_deviceOriginX = x;
1233 m_deviceOriginY = y;
1234
1235 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1236 }
1237
1238 // ---------------------------------------------------------------------------
1239 // coordinates transformations
1240 // ---------------------------------------------------------------------------
1241
1242 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1243 {
1244 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1245 }
1246
1247 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1248 {
1249 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1250 }
1251
1252 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1253 {
1254 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1255 }
1256
1257 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1258 {
1259 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1260 }
1261
1262 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1263 {
1264 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1265 }
1266
1267 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1268 {
1269 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1270 }
1271
1272 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1273 {
1274 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1275 }
1276
1277 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1278 {
1279 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1280 }
1281
1282 // ---------------------------------------------------------------------------
1283 // bit blit
1284 // ---------------------------------------------------------------------------
1285
1286 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1287 wxCoord width, wxCoord height,
1288 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1289 int rop, bool useMask)
1290 {
1291 wxMask *mask = NULL;
1292 if ( useMask )
1293 {
1294 const wxBitmap& bmp = source->m_selectedBitmap;
1295 mask = bmp.GetMask();
1296
1297 if ( !(bmp.Ok() && mask && mask->GetMaskBitmap()) )
1298 {
1299 // don't give assert here because this would break existing
1300 // programs - just silently ignore useMask parameter
1301 useMask = FALSE;
1302 }
1303 }
1304
1305 COLORREF old_textground = ::GetTextColor(GetHdc());
1306 COLORREF old_background = ::GetBkColor(GetHdc());
1307 if (m_textForegroundColour.Ok())
1308 {
1309 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1310 }
1311 if (m_textBackgroundColour.Ok())
1312 {
1313 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1314 }
1315
1316 DWORD dwRop = SRCCOPY;
1317 switch (rop)
1318 {
1319 case wxXOR: dwRop = SRCINVERT; break;
1320 case wxINVERT: dwRop = DSTINVERT; break;
1321 case wxOR_REVERSE: dwRop = 0x00DD0228; break;
1322 case wxAND_REVERSE: dwRop = SRCERASE; break;
1323 case wxCLEAR: dwRop = BLACKNESS; break;
1324 case wxSET: dwRop = WHITENESS; break;
1325 case wxOR_INVERT: dwRop = MERGEPAINT; break;
1326 case wxAND: dwRop = SRCAND; break;
1327 case wxOR: dwRop = SRCPAINT; break;
1328 case wxEQUIV: dwRop = 0x00990066; break;
1329 case wxNAND: dwRop = 0x007700E6; break;
1330 case wxAND_INVERT: dwRop = 0x00220326; break;
1331 case wxCOPY: dwRop = SRCCOPY; break;
1332 case wxNO_OP: dwRop = 0x00AA0029; break;
1333 case wxSRC_INVERT: dwRop = NOTSRCCOPY; break;
1334 case wxNOR: dwRop = NOTSRCCOPY; break;
1335 default:
1336 wxFAIL_MSG( wxT("unsupported logical function") );
1337 return FALSE;
1338 }
1339
1340
1341 bool success;
1342
1343 if (useMask)
1344 {
1345 #ifdef __WIN32__
1346 // prepare the mask bitmap
1347 HBITMAP hbmpMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
1348
1349 // select the correct brush: the current one by default, background one
1350 // if none
1351 HBRUSH hbrNew;
1352 if ( m_brush.Ok() )
1353 {
1354 hbrNew = (HBRUSH)m_brush.GetResourceHandle();
1355 }
1356 else if ( m_backgroundBrush.Ok() )
1357 {
1358 hbrNew = (HBRUSH)m_backgroundBrush.GetResourceHandle();
1359 }
1360 else
1361 {
1362 hbrNew = 0;
1363 }
1364
1365 HGDIOBJ hbrOld = hbrNew ? ::SelectObject(GetHdc(), hbrNew) : 0;
1366
1367 // we want the part of the image corresponding to the mask to be
1368 // transparent, i.e. do PATCOPY there and apply dwRop elsewhere
1369
1370 success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
1371 GetHdcOf(*source), xsrc, ysrc,
1372 hbmpMask, 0, 0,
1373 MAKEROP4(PATCOPY, dwRop)) != 0;
1374
1375 if ( hbrNew )
1376 {
1377 (void)::SelectObject(GetHdc(), hbrOld);
1378 }
1379
1380 ::DeleteObject(hbmpMask);
1381
1382 if ( !success )
1383 #endif // Win32
1384 {
1385 // Blit bitmap with mask
1386
1387 // create a temp buffer bitmap and DCs to access it and the mask
1388 HDC dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
1389 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1390 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1391 ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
1392 ::SelectObject(dc_buffer, buffer_bmap);
1393
1394 // copy dest to buffer
1395 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1396 GetHdc(), xdest, ydest, SRCCOPY) )
1397 {
1398 wxLogLastError("BitBlt");
1399 }
1400
1401 // copy src to buffer using selected raster op
1402 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1403 GetHdcOf(*source), xsrc, ysrc, dwRop) )
1404 {
1405 wxLogLastError("BitBlt");
1406 }
1407
1408 // set masked area in buffer to BLACK (pixel value 0)
1409 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1410 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1411 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1412 dc_mask, xsrc, ysrc, SRCAND) )
1413 {
1414 wxLogLastError("BitBlt");
1415 }
1416
1417 // set unmasked area in dest to BLACK
1418 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1419 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1420 if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height,
1421 dc_mask, xsrc, ysrc, SRCAND) )
1422 {
1423 wxLogLastError("BitBlt");
1424 }
1425 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1426 ::SetTextColor(GetHdc(), prevCol);
1427
1428 // OR buffer to dest
1429 success = ::BitBlt(GetHdc(), xdest, ydest,
1430 (int)width, (int)height,
1431 dc_buffer, 0, 0, SRCPAINT) != 0;
1432 if ( !success )
1433 {
1434 wxLogLastError("BitBlt");
1435 }
1436
1437 // tidy up temporary DCs and bitmap
1438 ::SelectObject(dc_mask, 0);
1439 ::DeleteDC(dc_mask);
1440 ::SelectObject(dc_buffer, 0);
1441 ::DeleteDC(dc_buffer);
1442 ::DeleteObject(buffer_bmap);
1443 }
1444 }
1445 else // no mask, just BitBlt() it
1446 {
1447 success = ::BitBlt(GetHdc(), xdest, ydest,
1448 (int)width, (int)height,
1449 GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
1450 if ( !success )
1451 {
1452 wxLogLastError("BitBlt");
1453 }
1454 }
1455 ::SetTextColor(GetHdc(), old_textground);
1456 ::SetBkColor(GetHdc(), old_background);
1457
1458 return success;
1459 }
1460
1461 void wxDC::DoGetSize(int *w, int *h) const
1462 {
1463 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1464 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1465 }
1466
1467 void wxDC::DoGetSizeMM(int *w, int *h) const
1468 {
1469 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1470 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1471 }
1472
1473 wxSize wxDC::GetPPI() const
1474 {
1475 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1476 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1477
1478 return wxSize(x, y);
1479 }
1480
1481 // For use by wxWindows only, unless custom units are required.
1482 void wxDC::SetLogicalScale(double x, double y)
1483 {
1484 m_logicalScaleX = x;
1485 m_logicalScaleY = y;
1486 }
1487
1488 #if WXWIN_COMPATIBILITY
1489 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1490 float *descent, float *externalLeading,
1491 wxFont *theFont, bool use16bit) const
1492 {
1493 wxCoord x1, y1, descent1, externalLeading1;
1494 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1495 *x = x1; *y = y1;
1496 if (descent)
1497 *descent = descent1;
1498 if (externalLeading)
1499 *externalLeading = externalLeading1;
1500 }
1501 #endif
1502
1503 // ---------------------------------------------------------------------------
1504 // spline drawing code
1505 // ---------------------------------------------------------------------------
1506
1507 #if wxUSE_SPLINES
1508
1509 class wxSpline: public wxObject
1510 {
1511 public:
1512 int type;
1513 wxList *points;
1514
1515 wxSpline(wxList *list);
1516 void DeletePoints();
1517
1518 // Doesn't delete points
1519 ~wxSpline();
1520 };
1521
1522 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1523
1524 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1525 double a3, double b3, double a4, double b4);
1526 void wx_clear_stack();
1527 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1528 double *y3, double *x4, double *y4);
1529 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1530 double x4, double y4);
1531 static bool wx_spline_add_point(double x, double y);
1532 static void wx_spline_draw_point_array(wxDC *dc);
1533 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1534
1535 void wxDC::DoDrawSpline(wxList *list)
1536 {
1537 wxSpline spline(list);
1538
1539 wx_draw_open_spline(this, &spline);
1540 }
1541
1542 wxList wx_spline_point_list;
1543
1544 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1545 {
1546 wxPoint *p;
1547 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1548 double x1, y1, x2, y2;
1549
1550 wxNode *node = spline->points->First();
1551 p = (wxPoint *)node->Data();
1552
1553 x1 = p->x;
1554 y1 = p->y;
1555
1556 node = node->Next();
1557 p = (wxPoint *)node->Data();
1558
1559 x2 = p->x;
1560 y2 = p->y;
1561 cx1 = (double)((x1 + x2) / 2);
1562 cy1 = (double)((y1 + y2) / 2);
1563 cx2 = (double)((cx1 + x2) / 2);
1564 cy2 = (double)((cy1 + y2) / 2);
1565
1566 wx_spline_add_point(x1, y1);
1567
1568 while ((node = node->Next()) != NULL)
1569 {
1570 p = (wxPoint *)node->Data();
1571 x1 = x2;
1572 y1 = y2;
1573 x2 = p->x;
1574 y2 = p->y;
1575 cx4 = (double)(x1 + x2) / 2;
1576 cy4 = (double)(y1 + y2) / 2;
1577 cx3 = (double)(x1 + cx4) / 2;
1578 cy3 = (double)(y1 + cy4) / 2;
1579
1580 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1581
1582 cx1 = cx4;
1583 cy1 = cy4;
1584 cx2 = (double)(cx1 + x2) / 2;
1585 cy2 = (double)(cy1 + y2) / 2;
1586 }
1587
1588 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1589 wx_spline_add_point(x2, y2);
1590
1591 wx_spline_draw_point_array(dc);
1592
1593 }
1594
1595 /********************* CURVES FOR SPLINES *****************************
1596
1597 The following spline drawing routine is from
1598
1599 "An Algorithm for High-Speed Curve Generation"
1600 by George Merrill Chaikin,
1601 Computer Graphics and Image Processing, 3, Academic Press,
1602 1974, 346-349.
1603
1604 and
1605
1606 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1607 Computer Graphics and Image Processing, 4, Academic Press,
1608 1975, 304-310.
1609
1610 ***********************************************************************/
1611
1612 #define half(z1, z2) ((z1+z2)/2.0)
1613 #define THRESHOLD 5
1614
1615 /* iterative version */
1616
1617 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1618 double b4)
1619 {
1620 register double xmid, ymid;
1621 double x1, y1, x2, y2, x3, y3, x4, y4;
1622
1623 wx_clear_stack();
1624 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1625
1626 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1627 xmid = (double)half(x2, x3);
1628 ymid = (double)half(y2, y3);
1629 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1630 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1631 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1632 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1633 } else {
1634 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1635 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1636 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1637 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1638 }
1639 }
1640 }
1641
1642
1643 /* utilities used by spline drawing routines */
1644
1645
1646 typedef struct wx_spline_stack_struct {
1647 double x1, y1, x2, y2, x3, y3, x4, y4;
1648 }
1649 Stack;
1650
1651 #define SPLINE_STACK_DEPTH 20
1652 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1653 static Stack *wx_stack_top;
1654 static int wx_stack_count;
1655
1656 void wx_clear_stack()
1657 {
1658 wx_stack_top = wx_spline_stack;
1659 wx_stack_count = 0;
1660 }
1661
1662 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1663 {
1664 wx_stack_top->x1 = x1;
1665 wx_stack_top->y1 = y1;
1666 wx_stack_top->x2 = x2;
1667 wx_stack_top->y2 = y2;
1668 wx_stack_top->x3 = x3;
1669 wx_stack_top->y3 = y3;
1670 wx_stack_top->x4 = x4;
1671 wx_stack_top->y4 = y4;
1672 wx_stack_top++;
1673 wx_stack_count++;
1674 }
1675
1676 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1677 double *x3, double *y3, double *x4, double *y4)
1678 {
1679 if (wx_stack_count == 0)
1680 return (0);
1681 wx_stack_top--;
1682 wx_stack_count--;
1683 *x1 = wx_stack_top->x1;
1684 *y1 = wx_stack_top->y1;
1685 *x2 = wx_stack_top->x2;
1686 *y2 = wx_stack_top->y2;
1687 *x3 = wx_stack_top->x3;
1688 *y3 = wx_stack_top->y3;
1689 *x4 = wx_stack_top->x4;
1690 *y4 = wx_stack_top->y4;
1691 return (1);
1692 }
1693
1694 static bool wx_spline_add_point(double x, double y)
1695 {
1696 wxPoint *point = new wxPoint;
1697 point->x = (int) x;
1698 point->y = (int) y;
1699 wx_spline_point_list.Append((wxObject*)point);
1700 return TRUE;
1701 }
1702
1703 static void wx_spline_draw_point_array(wxDC *dc)
1704 {
1705 dc->DrawLines(&wx_spline_point_list, 0, 0);
1706 wxNode *node = wx_spline_point_list.First();
1707 while (node)
1708 {
1709 wxPoint *point = (wxPoint *)node->Data();
1710 delete point;
1711 delete node;
1712 node = wx_spline_point_list.First();
1713 }
1714 }
1715
1716 wxSpline::wxSpline(wxList *list)
1717 {
1718 points = list;
1719 }
1720
1721 wxSpline::~wxSpline()
1722 {
1723 }
1724
1725 void wxSpline::DeletePoints()
1726 {
1727 for(wxNode *node = points->First(); node; node = points->First())
1728 {
1729 wxPoint *point = (wxPoint *)node->Data();
1730 delete point;
1731 delete node;
1732 }
1733 delete points;
1734 }
1735
1736
1737 #endif // wxUSE_SPLINES
1738
wxWidgets (Impactor)