1. wxFileDialog patch for multiple selection applied (with some small changes),
[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 #if wxUSE_COMMON_DIALOGS
49 #if wxUSE_NORLANDER_HEADERS
50 #include <windows.h>
51 #endif
52 #include <commdlg.h>
53 #endif
54
55 #ifndef __WIN32__
56 #include <print.h>
57 #endif
58
59 #include "wx/msw/private.h"
60
61 #if !USE_SHARED_LIBRARY
62 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
63 #endif
64
65 // ---------------------------------------------------------------------------
66 // constants
67 // ---------------------------------------------------------------------------
68
69 static const int VIEWPORT_EXTENT = 1000;
70
71 static const int MM_POINTS = 9;
72 static const int MM_METRIC = 10;
73
74 // usually this is defined in math.h
75 #ifndef M_PI
76 static const double M_PI = 3.14159265358979323846;
77 #endif // M_PI
78
79 // ---------------------------------------------------------------------------
80 // private functions
81 // ---------------------------------------------------------------------------
82
83 // convert degrees to radians
84 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
85
86 // ===========================================================================
87 // implementation
88 // ===========================================================================
89
90 // ---------------------------------------------------------------------------
91 // wxDC
92 // ---------------------------------------------------------------------------
93
94 // Default constructor
95 wxDC::wxDC()
96 {
97 m_canvas = NULL;
98
99 m_oldBitmap = 0;
100 m_oldPen = 0;
101 m_oldBrush = 0;
102 m_oldFont = 0;
103 m_oldPalette = 0;
104
105 m_bOwnsDC = FALSE;
106 m_hDC = 0;
107
108 m_windowExtX = VIEWPORT_EXTENT;
109 m_windowExtY = VIEWPORT_EXTENT;
110
111 m_hDCCount = 0;
112 }
113
114
115 wxDC::~wxDC()
116 {
117 if ( m_hDC != 0 ) {
118 SelectOldObjects(m_hDC);
119 if ( m_bOwnsDC ) {
120 if ( m_canvas == NULL )
121 ::DeleteDC(GetHdc());
122 else
123 ::ReleaseDC((HWND)m_canvas->GetHWND(), GetHdc());
124 }
125 }
126
127 }
128
129 // This will select current objects out of the DC,
130 // which is what you have to do before deleting the
131 // DC.
132 void wxDC::SelectOldObjects(WXHDC dc)
133 {
134 if (dc)
135 {
136 if (m_oldBitmap)
137 {
138 ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
139 if (m_selectedBitmap.Ok())
140 {
141 m_selectedBitmap.SetSelectedInto(NULL);
142 }
143 }
144 m_oldBitmap = 0;
145 if (m_oldPen)
146 {
147 ::SelectObject((HDC) dc, (HPEN) m_oldPen);
148 }
149 m_oldPen = 0;
150 if (m_oldBrush)
151 {
152 ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
153 }
154 m_oldBrush = 0;
155 if (m_oldFont)
156 {
157 ::SelectObject((HDC) dc, (HFONT) m_oldFont);
158 }
159 m_oldFont = 0;
160 if (m_oldPalette)
161 {
162 ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE);
163 }
164 m_oldPalette = 0;
165 }
166
167 m_brush = wxNullBrush;
168 m_pen = wxNullPen;
169 m_palette = wxNullPalette;
170 m_font = wxNullFont;
171 m_backgroundBrush = wxNullBrush;
172 m_selectedBitmap = wxNullBitmap;
173 }
174
175 // ---------------------------------------------------------------------------
176 // clipping
177 // ---------------------------------------------------------------------------
178
179 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
180 {
181 m_clipping = TRUE;
182 m_clipX1 = (int)cx;
183 m_clipY1 = (int)cy;
184 m_clipX2 = (int)(cx + cw);
185 m_clipY2 = (int)(cy + ch);
186
187 DoClipping((WXHDC) m_hDC);
188 }
189
190 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
191 {
192 wxCHECK_RET( region.GetHRGN(), wxT("invalid clipping region") );
193
194 wxRect box = region.GetBox();
195
196 m_clipping = TRUE;
197 m_clipX1 = box.x;
198 m_clipY1 = box.y;
199 m_clipX2 = box.x + box.width;
200 m_clipY2 = box.y + box.height;
201
202 #ifdef __WIN16__
203 SelectClipRgn(GetHdc(), (HRGN) region.GetHRGN());
204 #else
205 ExtSelectClipRgn(GetHdc(), (HRGN) region.GetHRGN(), RGN_AND);
206 #endif
207 }
208
209 void wxDC::DoClipping(WXHDC dc)
210 {
211 if (m_clipping && dc)
212 {
213 IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1), YLOG2DEV(m_clipY1),
214 XLOG2DEV(m_clipX2), YLOG2DEV(m_clipY2));
215 }
216 }
217
218 void wxDC::DestroyClippingRegion()
219 {
220 if (m_clipping && m_hDC)
221 {
222 // TODO: this should restore the previous clipping region,
223 // so that OnPaint processing works correctly, and the update clipping region
224 // doesn't get destroyed after the first DestroyClippingRegion.
225 HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
226 SelectClipRgn(GetHdc(), rgn);
227 DeleteObject(rgn);
228 }
229 m_clipping = FALSE;
230 }
231
232 // ---------------------------------------------------------------------------
233 // query capabilities
234 // ---------------------------------------------------------------------------
235
236 bool wxDC::CanDrawBitmap() const
237 {
238 return TRUE;
239 }
240
241 bool wxDC::CanGetTextExtent() const
242 {
243 // What sort of display is it?
244 int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
245
246 return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
247 }
248
249 int wxDC::GetDepth() const
250 {
251 return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
252 }
253
254 // ---------------------------------------------------------------------------
255 // drawing
256 // ---------------------------------------------------------------------------
257
258 void wxDC::Clear()
259 {
260 RECT rect;
261 if ( m_canvas )
262 {
263 GetClientRect((HWND) m_canvas->GetHWND(), &rect);
264 }
265 else
266 {
267 wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") );
268
269 rect.left = 0; rect.top = 0;
270 rect.right = m_selectedBitmap.GetWidth();
271 rect.bottom = m_selectedBitmap.GetHeight();
272 }
273
274 (void) ::SetMapMode(GetHdc(), MM_TEXT);
275
276 DWORD colour = GetBkColor(GetHdc());
277 HBRUSH brush = CreateSolidBrush(colour);
278 FillRect(GetHdc(), &rect, brush);
279 DeleteObject(brush);
280
281 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
282 ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
283 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
284 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
285 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
286 }
287
288 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
289 {
290 (void)ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
291 col.GetPixel(),
292 style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
293 : FLOODFILLBORDER);
294
295 CalcBoundingBox(x, y);
296 }
297
298 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
299 {
300 // added by steve 29.12.94 (copied from DrawPoint)
301 // returns TRUE for pixels in the color of the current pen
302 // and FALSE for all other pixels colors
303 // if col is non-NULL return the color of the pixel
304
305 // get the color of the pixel
306 COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
307 // get the color of the pen
308 COLORREF pencolor = 0x00ffffff;
309 if (m_pen.Ok())
310 {
311 pencolor = m_pen.GetColour().GetPixel();
312 }
313
314 // return the color of the pixel
315 if(col)
316 col->Set(GetRValue(pixelcolor),GetGValue(pixelcolor),GetBValue(pixelcolor));
317
318 // check, if color of the pixels is the same as the color
319 // of the current pen
320 return(pixelcolor==pencolor);
321 }
322
323 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
324 {
325 wxCoord x1 = x-VIEWPORT_EXTENT;
326 wxCoord y1 = y-VIEWPORT_EXTENT;
327 wxCoord x2 = x+VIEWPORT_EXTENT;
328 wxCoord y2 = y+VIEWPORT_EXTENT;
329
330 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
331 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
332
333 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
334 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
335
336 CalcBoundingBox(x1, y1);
337 CalcBoundingBox(x2, y2);
338 }
339
340 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
341 {
342 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
343 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
344
345 /* MATTHEW: [6] New normalization */
346 #if WX_STANDARD_GRAPHICS
347 (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
348 #endif
349
350 CalcBoundingBox(x1, y1);
351 CalcBoundingBox(x2, y2);
352 }
353
354 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
355 {
356 double dx = xc-x1;
357 double dy = yc-y1;
358 double radius = (double)sqrt(dx*dx+dy*dy) ;;
359 if (x1==x2 && x2==y2)
360 {
361 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
362 return;
363 }
364
365 wxCoord xx1 = XLOG2DEV(x1);
366 wxCoord yy1 = YLOG2DEV(y1);
367 wxCoord xx2 = XLOG2DEV(x2);
368 wxCoord yy2 = YLOG2DEV(y2);
369 wxCoord xxc = XLOG2DEV(xc);
370 wxCoord yyc = YLOG2DEV(yc);
371 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
372
373 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
374 wxCoord xxx1 = (wxCoord) (xxc-ray);
375 wxCoord yyy1 = (wxCoord) (yyc-ray);
376 wxCoord xxx2 = (wxCoord) (xxc+ray);
377 wxCoord yyy2 = (wxCoord) (yyc+ray);
378 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
379 {
380 // Have to add 1 to bottom-right corner of rectangle
381 // to make semi-circles look right (crooked line otherwise).
382 // Unfortunately this is not a reliable method, depends
383 // on the size of shape.
384 // TODO: figure out why this happens!
385 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
386 xx1,yy1,xx2,yy2);
387 }
388 else
389 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
390 xx1,yy1,xx2,yy2);
391
392 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
393 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
394 }
395
396 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
397 {
398 COLORREF color = 0x00ffffff;
399 if (m_pen.Ok())
400 {
401 color = m_pen.GetColour().GetPixel();
402 }
403
404 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
405
406 CalcBoundingBox(x, y);
407 }
408
409 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
410 {
411 // Do things less efficiently if we have offsets
412 if (xoffset != 0 || yoffset != 0)
413 {
414 POINT *cpoints = new POINT[n];
415 int i;
416 for (i = 0; i < n; i++)
417 {
418 cpoints[i].x = (int)(points[i].x + xoffset);
419 cpoints[i].y = (int)(points[i].y + yoffset);
420
421 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
422 }
423 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
424 (void)Polygon(GetHdc(), cpoints, n);
425 SetPolyFillMode(GetHdc(),prev);
426 delete[] cpoints;
427 }
428 else
429 {
430 int i;
431 for (i = 0; i < n; i++)
432 CalcBoundingBox(points[i].x, points[i].y);
433
434 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
435 (void)Polygon(GetHdc(), (POINT*) points, n);
436 SetPolyFillMode(GetHdc(),prev);
437 }
438 }
439
440 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
441 {
442 // Do things less efficiently if we have offsets
443 if (xoffset != 0 || yoffset != 0)
444 {
445 POINT *cpoints = new POINT[n];
446 int i;
447 for (i = 0; i < n; i++)
448 {
449 cpoints[i].x = (int)(points[i].x + xoffset);
450 cpoints[i].y = (int)(points[i].y + yoffset);
451
452 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
453 }
454 (void)Polyline(GetHdc(), cpoints, n);
455 delete[] cpoints;
456 }
457 else
458 {
459 int i;
460 for (i = 0; i < n; i++)
461 CalcBoundingBox(points[i].x, points[i].y);
462
463 (void)Polyline(GetHdc(), (POINT*) points, n);
464 }
465 }
466
467 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
468 {
469 wxCoord x2 = x + width;
470 wxCoord y2 = y + height;
471
472 /* MATTHEW: [6] new normalization */
473 #if WX_STANDARD_GRAPHICS
474 bool do_brush, do_pen;
475
476 do_brush = m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT;
477 do_pen = m_pen.Ok() && m_pen.GetStyle() != wxTRANSPARENT;
478
479 if (do_brush) {
480 HPEN orig_pen = NULL;
481
482 if (do_pen || !m_pen.Ok())
483 orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
484
485 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
486 XLOG2DEV(x2) + 1, YLOG2DEV(y2) + 1);
487
488 if (do_pen || !m_pen.Ok())
489 ::SelectObject(GetHdc() , orig_pen);
490 }
491 if (do_pen) {
492 HBRUSH orig_brush = NULL;
493
494 if (do_brush || !m_brush.Ok())
495 orig_brush = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH) ::GetStockObject(NULL_BRUSH));
496
497 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
498 XLOG2DEV(x2), YLOG2DEV(y2));
499
500 if (do_brush || !m_brush.Ok())
501 ::SelectObject(GetHdc(), orig_brush);
502 }
503 #else
504 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
505 #endif
506
507 CalcBoundingBox(x, y);
508 CalcBoundingBox(x2, y2);
509 }
510
511 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
512 {
513 // Now, a negative radius value is interpreted to mean
514 // 'the proportion of the smallest X or Y dimension'
515
516 if (radius < 0.0)
517 {
518 double smallest = 0.0;
519 if (width < height)
520 smallest = width;
521 else
522 smallest = height;
523 radius = (- radius * smallest);
524 }
525
526 wxCoord x2 = (x+width);
527 wxCoord y2 = (y+height);
528
529 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
530 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
531
532 CalcBoundingBox(x, y);
533 CalcBoundingBox(x2, y2);
534 }
535
536 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
537 {
538 wxCoord x2 = (x+width);
539 wxCoord y2 = (y+height);
540
541 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
542
543 CalcBoundingBox(x, y);
544 CalcBoundingBox(x2, y2);
545 }
546
547 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
548 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
549 {
550 wxCoord x2 = (x+w);
551 wxCoord y2 = (y+h);
552
553 int rx1 = XLOG2DEV(x+w/2);
554 int ry1 = YLOG2DEV(y+h/2);
555 int rx2 = rx1;
556 int ry2 = ry1;
557
558 sa = DegToRad(sa);
559 ea = DegToRad(ea);
560
561 rx1 += (int)(100.0 * abs(w) * cos(sa));
562 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
563 rx2 += (int)(100.0 * abs(w) * cos(ea));
564 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
565
566 // draw pie with NULL_PEN first and then outline otherwise a line is
567 // drawn from the start and end points to the centre
568 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
569 if (m_signY > 0)
570 {
571 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
572 rx1, ry1, rx2, ry2);
573 }
574 else
575 {
576 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
577 rx1, ry1-1, rx2, ry2-1);
578 }
579 ::SelectObject(GetHdc(), orig_pen);
580 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
581 rx1, ry1, rx2, ry2);
582
583 CalcBoundingBox(x, y);
584 CalcBoundingBox(x2, y2);
585 }
586
587 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
588 {
589 #if defined(__WIN32__) && !defined(__SC__) && !defined(__TWIN32__)
590 ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON(),
591 icon.GetWidth(), icon.GetHeight(), 0, 0, DI_NORMAL);
592 #else
593 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON());
594 #endif
595
596 CalcBoundingBox(x, y);
597 CalcBoundingBox(x+icon.GetWidth(), y+icon.GetHeight());
598 }
599
600 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
601 {
602 if (!bmp.Ok())
603 return;
604
605 // If we're not drawing transparently, and not drawing to a printer,
606 // optimize this function to use Windows functions.
607 if (!useMask && !IsKindOf(CLASSINFO(wxPrinterDC)))
608 {
609 HDC cdc = GetHdc();
610 HDC memdc = ::CreateCompatibleDC( cdc );
611 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
612
613 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
614
615 ::SelectObject( memdc, hbitmap );
616 ::BitBlt( cdc, x, y, bmp.GetWidth(), bmp.GetHeight(), memdc, 0, 0, SRCCOPY);
617 ::DeleteDC( memdc );
618 }
619 else
620 {
621 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API level
622 wxMemoryDC memDC;
623 memDC.SelectObject(bmp);
624
625 /* Not sure if we need this. The mask should leave the
626 * masked areas as per the original background of this DC.
627 */
628 /*
629 // There might be transparent areas, so make these
630 // the same colour as this DC
631 memDC.SetBackground(* GetBackground());
632 memDC.Clear();
633 */
634
635 Blit(x, y, bmp.GetWidth(), bmp.GetHeight(), & memDC, 0, 0, wxCOPY, useMask);
636
637 memDC.SelectObject(wxNullBitmap);
638 }
639 }
640
641 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
642 {
643 DrawAnyText(text, x, y);
644
645 // update the bounding box
646 CalcBoundingBox(x, y);
647
648 wxCoord w, h;
649 GetTextExtent(text, &w, &h);
650 CalcBoundingBox(x + w, y + h);
651 }
652
653 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
654 {
655 // prepare for drawing the text
656 if ( m_textForegroundColour.Ok() )
657 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
658
659 DWORD old_background = 0;
660 if ( m_textBackgroundColour.Ok() )
661 {
662 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
663 }
664
665 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
666 : OPAQUE);
667
668 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
669 text.c_str(), text.length()) == 0 )
670 {
671 wxLogLastError("TextOut");
672 }
673
674 // restore the old parameters (text foreground colour may be left because
675 // it never is set to anything else, but background should remain
676 // transparent even if we just drew an opaque string)
677 if ( m_textBackgroundColour.Ok() )
678 (void)SetBkColor(GetHdc(), old_background);
679
680 SetBkMode(GetHdc(), TRANSPARENT);
681 }
682
683 void wxDC::DoDrawRotatedText(const wxString& text,
684 wxCoord x, wxCoord y,
685 double angle)
686 {
687 // we test that we have some font because otherwise we should still use the
688 // "else" part below to avoid that DrawRotatedText(angle = 180) and
689 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
690 // font for drawing rotated fonts unfortunately)
691 if ( (angle == 0.0) && m_font.Ok() )
692 {
693 DoDrawText(text, x, y);
694 }
695 else
696 {
697 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
698 // can't have non zero orientation/escapement
699 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
700 HFONT hfont = (HFONT)font.GetResourceHandle();
701 LOGFONT lf;
702 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
703 {
704 wxLogLastError("GetObject(hfont)");
705 }
706
707 // GDI wants the angle in tenth of degree
708 long angle10 = (long)(angle * 10);
709 lf.lfEscapement = angle10;
710 lf. lfOrientation = angle10;
711
712 hfont = ::CreateFontIndirect(&lf);
713 if ( !hfont )
714 {
715 wxLogLastError("CreateFont");
716 }
717 else
718 {
719 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
720
721 DrawAnyText(text, x, y);
722
723 (void)::SelectObject(GetHdc(), hfontOld);
724 }
725
726 // call the bounding box by adding all four vertices of the rectangle
727 // containing the text to it (simpler and probably not slower than
728 // determining which of them is really topmost/leftmost/...)
729 wxCoord w, h;
730 GetTextExtent(text, &w, &h);
731
732 double rad = DegToRad(angle);
733
734 // "upper left" and "upper right"
735 CalcBoundingBox(x, y);
736 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
737 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
738
739 // "bottom left" and "bottom right"
740 x += (wxCoord)(h*sin(rad));
741 y += (wxCoord)(h*cos(rad));
742 CalcBoundingBox(x, y);
743 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
744 }
745 }
746
747 // ---------------------------------------------------------------------------
748 // set GDI objects
749 // ---------------------------------------------------------------------------
750
751 void wxDC::SetPalette(const wxPalette& palette)
752 {
753 // Set the old object temporarily, in case the assignment deletes an object
754 // that's not yet selected out.
755 if (m_oldPalette)
756 {
757 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
758 m_oldPalette = 0;
759 }
760
761 m_palette = palette;
762
763 if (!m_palette.Ok())
764 {
765 // Setting a NULL colourmap is a way of restoring
766 // the original colourmap
767 if (m_oldPalette)
768 {
769 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
770 m_oldPalette = 0;
771 }
772
773 return;
774 }
775
776 if (m_palette.Ok() && m_palette.GetHPALETTE())
777 {
778 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
779 if (!m_oldPalette)
780 m_oldPalette = (WXHPALETTE) oldPal;
781
782 ::RealizePalette(GetHdc());
783 }
784 }
785
786 void wxDC::SetFont(const wxFont& the_font)
787 {
788 // Set the old object temporarily, in case the assignment deletes an object
789 // that's not yet selected out.
790 if (m_oldFont)
791 {
792 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
793 m_oldFont = 0;
794 }
795
796 m_font = the_font;
797
798 if (!the_font.Ok())
799 {
800 if (m_oldFont)
801 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
802 m_oldFont = 0;
803 }
804
805 if (m_font.Ok() && m_font.GetResourceHandle())
806 {
807 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
808 if (f == (HFONT) NULL)
809 {
810 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
811 }
812 if (!m_oldFont)
813 m_oldFont = (WXHFONT) f;
814 }
815 }
816
817 void wxDC::SetPen(const wxPen& pen)
818 {
819 // Set the old object temporarily, in case the assignment deletes an object
820 // that's not yet selected out.
821 if (m_oldPen)
822 {
823 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
824 m_oldPen = 0;
825 }
826
827 m_pen = pen;
828
829 if (!m_pen.Ok())
830 {
831 if (m_oldPen)
832 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
833 m_oldPen = 0;
834 }
835
836 if (m_pen.Ok())
837 {
838 if (m_pen.GetResourceHandle())
839 {
840 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
841 if (!m_oldPen)
842 m_oldPen = (WXHPEN) p;
843 }
844 }
845 }
846
847 void wxDC::SetBrush(const wxBrush& brush)
848 {
849 // Set the old object temporarily, in case the assignment deletes an object
850 // that's not yet selected out.
851 if (m_oldBrush)
852 {
853 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
854 m_oldBrush = 0;
855 }
856
857 m_brush = brush;
858
859 if (!m_brush.Ok())
860 {
861 if (m_oldBrush)
862 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
863 m_oldBrush = 0;
864 }
865
866 if (m_brush.Ok())
867 {
868 if (m_brush.GetResourceHandle())
869 {
870 HBRUSH b = 0;
871 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
872 if (!m_oldBrush)
873 m_oldBrush = (WXHBRUSH) b;
874 }
875 }
876 }
877
878 void wxDC::SetBackground(const wxBrush& brush)
879 {
880 m_backgroundBrush = brush;
881
882 if (!m_backgroundBrush.Ok())
883 return;
884
885 if (m_canvas)
886 {
887 bool customColours = TRUE;
888 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
889 // change background colours from the control-panel specified colours.
890 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
891 customColours = FALSE;
892
893 if (customColours)
894 {
895 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
896 {
897 m_canvas->SetTransparent(TRUE);
898 }
899 else
900 {
901 // New behaviour, 10/2/99: setting the background brush of a DC
902 // doesn't affect the window background colour. However,
903 // I'm leaving in the transparency setting because it's needed by
904 // various controls (e.g. wxStaticText) to determine whether to draw
905 // transparently or not. TODO: maybe this should be a new function
906 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
907 // parent?
908 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
909 m_canvas->SetTransparent(FALSE);
910 }
911 }
912 }
913 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
914 {
915 (void)SetBkColor(GetHdc(), new_color);
916 }
917 }
918
919 void wxDC::SetBackgroundMode(int mode)
920 {
921 m_backgroundMode = mode;
922
923 // SetBackgroundColour now only refers to text background
924 // and m_backgroundMode is used there
925
926 /*
927 if (m_backgroundMode == wxTRANSPARENT)
928 ::SetBkMode(GetHdc(), TRANSPARENT);
929 else
930 ::SetBkMode(GetHdc(), OPAQUE);
931 */
932 }
933
934 void wxDC::SetLogicalFunction(int function)
935 {
936 m_logicalFunction = function;
937
938 SetRop((WXHDC) m_hDC);
939 }
940
941 void wxDC::SetRop(WXHDC dc)
942 {
943 if (!dc || m_logicalFunction < 0)
944 return;
945
946 int c_rop;
947 // These may be wrong
948 switch (m_logicalFunction)
949 {
950 // case wxXOR: c_rop = R2_XORPEN; break;
951 case wxXOR: c_rop = R2_NOTXORPEN; break;
952 case wxINVERT: c_rop = R2_NOT; break;
953 case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break;
954 case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break;
955 case wxCLEAR: c_rop = R2_WHITE; break;
956 case wxSET: c_rop = R2_BLACK; break;
957 case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break;
958 case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break;
959 case wxAND: c_rop = R2_MASKPEN; break;
960 case wxOR: c_rop = R2_MERGEPEN; break;
961 case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break;
962 case wxEQUIV:
963 case wxNAND:
964 case wxCOPY:
965 default:
966 c_rop = R2_COPYPEN; break;
967 }
968 SetROP2((HDC) dc, c_rop);
969 }
970
971 bool wxDC::StartDoc(const wxString& message)
972 {
973 // We might be previewing, so return TRUE to let it continue.
974 return TRUE;
975 }
976
977 void wxDC::EndDoc()
978 {
979 }
980
981 void wxDC::StartPage()
982 {
983 }
984
985 void wxDC::EndPage()
986 {
987 }
988
989 // ---------------------------------------------------------------------------
990 // text metrics
991 // ---------------------------------------------------------------------------
992
993 wxCoord wxDC::GetCharHeight() const
994 {
995 TEXTMETRIC lpTextMetric;
996
997 GetTextMetrics(GetHdc(), &lpTextMetric);
998
999 return YDEV2LOGREL(lpTextMetric.tmHeight);
1000 }
1001
1002 wxCoord wxDC::GetCharWidth() const
1003 {
1004 TEXTMETRIC lpTextMetric;
1005
1006 GetTextMetrics(GetHdc(), &lpTextMetric);
1007
1008 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1009 }
1010
1011 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1012 wxCoord *descent, wxCoord *externalLeading,
1013 wxFont *theFont) const
1014 {
1015 wxFont *fontToUse = (wxFont*) theFont;
1016 if (!fontToUse)
1017 fontToUse = (wxFont*) &m_font;
1018
1019 SIZE sizeRect;
1020 TEXTMETRIC tm;
1021
1022 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1023 GetTextMetrics(GetHdc(), &tm);
1024
1025 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1026 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1027 if (descent) *descent = tm.tmDescent;
1028 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1029 }
1030
1031 void wxDC::SetMapMode(int mode)
1032 {
1033 m_mappingMode = mode;
1034
1035 int pixel_width = 0;
1036 int pixel_height = 0;
1037 int mm_width = 0;
1038 int mm_height = 0;
1039
1040 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1041 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1042 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1043 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1044
1045 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1046 {
1047 return;
1048 }
1049
1050 double mm2pixelsX = pixel_width/mm_width;
1051 double mm2pixelsY = pixel_height/mm_height;
1052
1053 switch (mode)
1054 {
1055 case wxMM_TWIPS:
1056 {
1057 m_logicalScaleX = (twips2mm * mm2pixelsX);
1058 m_logicalScaleY = (twips2mm * mm2pixelsY);
1059 break;
1060 }
1061 case wxMM_POINTS:
1062 {
1063 m_logicalScaleX = (pt2mm * mm2pixelsX);
1064 m_logicalScaleY = (pt2mm * mm2pixelsY);
1065 break;
1066 }
1067 case wxMM_METRIC:
1068 {
1069 m_logicalScaleX = mm2pixelsX;
1070 m_logicalScaleY = mm2pixelsY;
1071 break;
1072 }
1073 case wxMM_LOMETRIC:
1074 {
1075 m_logicalScaleX = (mm2pixelsX/10.0);
1076 m_logicalScaleY = (mm2pixelsY/10.0);
1077 break;
1078 }
1079 default:
1080 case wxMM_TEXT:
1081 {
1082 m_logicalScaleX = 1.0;
1083 m_logicalScaleY = 1.0;
1084 break;
1085 }
1086 }
1087
1088 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1089 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1090
1091 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1092 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1093 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1094 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1095 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1096 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1097 }
1098
1099 void wxDC::SetUserScale(double x, double y)
1100 {
1101 m_userScaleX = x;
1102 m_userScaleY = y;
1103
1104 SetMapMode(m_mappingMode);
1105 }
1106
1107 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1108 {
1109 m_signX = xLeftRight ? 1 : -1;
1110 m_signY = yBottomUp ? -1 : 1;
1111
1112 SetMapMode(m_mappingMode);
1113 }
1114
1115 void wxDC::SetSystemScale(double x, double y)
1116 {
1117 m_scaleX = x;
1118 m_scaleY = y;
1119
1120 SetMapMode(m_mappingMode);
1121 }
1122
1123 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1124 {
1125 m_logicalOriginX = x;
1126 m_logicalOriginY = y;
1127
1128 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1129 }
1130
1131 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1132 {
1133 m_deviceOriginX = x;
1134 m_deviceOriginY = y;
1135
1136 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1137 }
1138
1139 // ---------------------------------------------------------------------------
1140 // coordinates transformations
1141 // ---------------------------------------------------------------------------
1142
1143 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1144 {
1145 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1146 }
1147
1148 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1149 {
1150 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1151 }
1152
1153 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1154 {
1155 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1156 }
1157
1158 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1159 {
1160 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1161 }
1162
1163 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1164 {
1165 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1166 }
1167
1168 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1169 {
1170 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1171 }
1172
1173 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1174 {
1175 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1176 }
1177
1178 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1179 {
1180 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1181 }
1182
1183 // ---------------------------------------------------------------------------
1184 // bit blit
1185 // ---------------------------------------------------------------------------
1186 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
1187 wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop, bool useMask)
1188 {
1189 wxCoord xdest1 = xdest;
1190 wxCoord ydest1 = ydest;
1191 wxCoord xsrc1 = xsrc;
1192 wxCoord ysrc1 = ysrc;
1193
1194 // Chris Breeze 18/5/98: use text foreground/background colours
1195 // when blitting from 1-bit bitmaps
1196 COLORREF old_textground = ::GetTextColor(GetHdc());
1197 COLORREF old_background = ::GetBkColor(GetHdc());
1198 if (m_textForegroundColour.Ok())
1199 {
1200 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1201 }
1202 if (m_textBackgroundColour.Ok())
1203 {
1204 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1205 }
1206
1207 DWORD dwRop = rop == wxCOPY ? SRCCOPY :
1208 rop == wxCLEAR ? WHITENESS :
1209 rop == wxSET ? BLACKNESS :
1210 rop == wxINVERT ? DSTINVERT :
1211 rop == wxAND ? MERGECOPY :
1212 rop == wxOR ? MERGEPAINT :
1213 rop == wxSRC_INVERT ? NOTSRCCOPY :
1214 rop == wxXOR ? SRCINVERT :
1215 rop == wxOR_REVERSE ? MERGEPAINT :
1216 rop == wxAND_REVERSE ? SRCERASE :
1217 rop == wxSRC_OR ? SRCPAINT :
1218 rop == wxSRC_AND ? SRCAND :
1219 SRCCOPY;
1220
1221 bool success = TRUE;
1222 if (useMask && source->m_selectedBitmap.Ok() && source->m_selectedBitmap.GetMask())
1223 {
1224
1225 #if 0 // __WIN32__
1226 // Not implemented under Win95 (or maybe a specific device?)
1227 if (MaskBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1228 (HDC) source->m_hDC, xsrc1, ysrc1, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap(),
1229 0, 0, 0xAACC0020))
1230 {
1231 // Success
1232 }
1233 else
1234 #endif
1235 {
1236 // Old code
1237 #if 0
1238 HDC dc_mask = CreateCompatibleDC((HDC) source->m_hDC);
1239 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1240 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1241 dc_mask, xsrc1, ysrc1, 0x00220326 /* NOTSRCAND */) != 0);
1242 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1243 (HDC) source->m_hDC, xsrc1, ysrc1, SRCPAINT) != 0);
1244 ::SelectObject(dc_mask, 0);
1245 ::DeleteDC(dc_mask);
1246 #endif
1247 // New code from Chris Breeze, 15/7/98
1248 // Blit bitmap with mask
1249
1250 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1251 {
1252 // If we are printing source colours are screen colours
1253 // not printer colours and so we need copy the bitmap
1254 // pixel by pixel.
1255 RECT rect;
1256 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1257 HDC dc_src = (HDC) source->m_hDC;
1258
1259 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1260 for (int x = 0; x < width; x++)
1261 {
1262 for (int y = 0; y < height; y++)
1263 {
1264 COLORREF cref = ::GetPixel(dc_mask, x, y);
1265 if (cref)
1266 {
1267 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1268 rect.left = xdest1 + x; rect.right = rect.left + 1;
1269 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1270 ::FillRect(GetHdc(), &rect, brush);
1271 ::DeleteObject(brush);
1272 }
1273 }
1274 }
1275 ::SelectObject(dc_mask, 0);
1276 ::DeleteDC(dc_mask);
1277 }
1278 else
1279 {
1280 // create a temp buffer bitmap and DCs to access it and the mask
1281 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1282 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1283 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1284 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1285 ::SelectObject(dc_buffer, buffer_bmap);
1286
1287 // copy dest to buffer
1288 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1289 GetHdc(), xdest1, ydest1, SRCCOPY);
1290
1291 // copy src to buffer using selected raster op
1292 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1293 (HDC) source->m_hDC, xsrc1, ysrc1, dwRop);
1294
1295 // set masked area in buffer to BLACK (pixel value 0)
1296 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1297 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1298 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1299 dc_mask, xsrc1, ysrc1, SRCAND);
1300
1301 // set unmasked area in dest to BLACK
1302 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1303 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1304 ::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1305 dc_mask, xsrc1, ysrc1, SRCAND);
1306 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1307 ::SetTextColor(GetHdc(), prevCol);
1308
1309 // OR buffer to dest
1310 success = (::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1311 dc_buffer, 0, 0, SRCPAINT) != 0);
1312
1313 // tidy up temporary DCs and bitmap
1314 ::SelectObject(dc_mask, 0);
1315 ::DeleteDC(dc_mask);
1316 ::SelectObject(dc_buffer, 0);
1317 ::DeleteDC(dc_buffer);
1318 ::DeleteObject(buffer_bmap);
1319 }
1320 }
1321 }
1322 else
1323 {
1324 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1325 {
1326 // If we are printing, source colours are screen colours
1327 // not printer colours and so we need copy the bitmap
1328 // pixel by pixel.
1329 HDC dc_src = (HDC) source->m_hDC;
1330 RECT rect;
1331 for (int x = 0; x < width; x++)
1332 {
1333 for (int y = 0; y < height; y++)
1334 {
1335 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1336 rect.left = xdest1 + x; rect.right = rect.left + 1;
1337 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1338 ::FillRect(GetHdc(), &rect, brush);
1339 ::DeleteObject(brush);
1340 }
1341 }
1342 }
1343 else
1344 {
1345 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height, (HDC) source->m_hDC,
1346 xsrc1, ysrc1, dwRop) != 0);
1347 }
1348 }
1349 ::SetTextColor(GetHdc(), old_textground);
1350 ::SetBkColor(GetHdc(), old_background);
1351
1352 return success;
1353 }
1354
1355 void wxDC::DoGetSize(int *w, int *h) const
1356 {
1357 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1358 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1359 }
1360
1361 void wxDC::DoGetSizeMM(int *w, int *h) const
1362 {
1363 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1364 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1365 }
1366
1367 wxSize wxDC::GetPPI() const
1368 {
1369 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1370 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1371
1372 return wxSize(x, y);
1373 }
1374
1375 // For use by wxWindows only, unless custom units are required.
1376 void wxDC::SetLogicalScale(double x, double y)
1377 {
1378 m_logicalScaleX = x;
1379 m_logicalScaleY = y;
1380 }
1381
1382 #if WXWIN_COMPATIBILITY
1383 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1384 float *descent, float *externalLeading,
1385 wxFont *theFont, bool use16bit) const
1386 {
1387 wxCoord x1, y1, descent1, externalLeading1;
1388 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1389 *x = x1; *y = y1;
1390 if (descent)
1391 *descent = descent1;
1392 if (externalLeading)
1393 *externalLeading = externalLeading1;
1394 }
1395 #endif
1396
1397 // ---------------------------------------------------------------------------
1398 // spline drawing code
1399 // ---------------------------------------------------------------------------
1400
1401 #if wxUSE_SPLINES
1402
1403 class wxSpline: public wxObject
1404 {
1405 public:
1406 int type;
1407 wxList *points;
1408
1409 wxSpline(wxList *list);
1410 void DeletePoints();
1411
1412 // Doesn't delete points
1413 ~wxSpline();
1414 };
1415
1416 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1417
1418 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1419 double a3, double b3, double a4, double b4);
1420 void wx_clear_stack();
1421 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1422 double *y3, double *x4, double *y4);
1423 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1424 double x4, double y4);
1425 static bool wx_spline_add_point(double x, double y);
1426 static void wx_spline_draw_point_array(wxDC *dc);
1427 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1428
1429 void wxDC::DoDrawSpline(wxList *list)
1430 {
1431 wxSpline spline(list);
1432
1433 wx_draw_open_spline(this, &spline);
1434 }
1435
1436 wxList wx_spline_point_list;
1437
1438 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1439 {
1440 wxPoint *p;
1441 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1442 double x1, y1, x2, y2;
1443
1444 wxNode *node = spline->points->First();
1445 p = (wxPoint *)node->Data();
1446
1447 x1 = p->x;
1448 y1 = p->y;
1449
1450 node = node->Next();
1451 p = (wxPoint *)node->Data();
1452
1453 x2 = p->x;
1454 y2 = p->y;
1455 cx1 = (double)((x1 + x2) / 2);
1456 cy1 = (double)((y1 + y2) / 2);
1457 cx2 = (double)((cx1 + x2) / 2);
1458 cy2 = (double)((cy1 + y2) / 2);
1459
1460 wx_spline_add_point(x1, y1);
1461
1462 while ((node = node->Next()) != NULL)
1463 {
1464 p = (wxPoint *)node->Data();
1465 x1 = x2;
1466 y1 = y2;
1467 x2 = p->x;
1468 y2 = p->y;
1469 cx4 = (double)(x1 + x2) / 2;
1470 cy4 = (double)(y1 + y2) / 2;
1471 cx3 = (double)(x1 + cx4) / 2;
1472 cy3 = (double)(y1 + cy4) / 2;
1473
1474 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1475
1476 cx1 = cx4;
1477 cy1 = cy4;
1478 cx2 = (double)(cx1 + x2) / 2;
1479 cy2 = (double)(cy1 + y2) / 2;
1480 }
1481
1482 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1483 wx_spline_add_point(x2, y2);
1484
1485 wx_spline_draw_point_array(dc);
1486
1487 }
1488
1489 /********************* CURVES FOR SPLINES *****************************
1490
1491 The following spline drawing routine is from
1492
1493 "An Algorithm for High-Speed Curve Generation"
1494 by George Merrill Chaikin,
1495 Computer Graphics and Image Processing, 3, Academic Press,
1496 1974, 346-349.
1497
1498 and
1499
1500 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1501 Computer Graphics and Image Processing, 4, Academic Press,
1502 1975, 304-310.
1503
1504 ***********************************************************************/
1505
1506 #define half(z1, z2) ((z1+z2)/2.0)
1507 #define THRESHOLD 5
1508
1509 /* iterative version */
1510
1511 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1512 double b4)
1513 {
1514 register double xmid, ymid;
1515 double x1, y1, x2, y2, x3, y3, x4, y4;
1516
1517 wx_clear_stack();
1518 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1519
1520 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1521 xmid = (double)half(x2, x3);
1522 ymid = (double)half(y2, y3);
1523 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1524 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1525 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1526 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1527 } else {
1528 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1529 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1530 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1531 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1532 }
1533 }
1534 }
1535
1536
1537 /* utilities used by spline drawing routines */
1538
1539
1540 typedef struct wx_spline_stack_struct {
1541 double x1, y1, x2, y2, x3, y3, x4, y4;
1542 }
1543 Stack;
1544
1545 #define SPLINE_STACK_DEPTH 20
1546 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1547 static Stack *wx_stack_top;
1548 static int wx_stack_count;
1549
1550 void wx_clear_stack()
1551 {
1552 wx_stack_top = wx_spline_stack;
1553 wx_stack_count = 0;
1554 }
1555
1556 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1557 {
1558 wx_stack_top->x1 = x1;
1559 wx_stack_top->y1 = y1;
1560 wx_stack_top->x2 = x2;
1561 wx_stack_top->y2 = y2;
1562 wx_stack_top->x3 = x3;
1563 wx_stack_top->y3 = y3;
1564 wx_stack_top->x4 = x4;
1565 wx_stack_top->y4 = y4;
1566 wx_stack_top++;
1567 wx_stack_count++;
1568 }
1569
1570 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1571 double *x3, double *y3, double *x4, double *y4)
1572 {
1573 if (wx_stack_count == 0)
1574 return (0);
1575 wx_stack_top--;
1576 wx_stack_count--;
1577 *x1 = wx_stack_top->x1;
1578 *y1 = wx_stack_top->y1;
1579 *x2 = wx_stack_top->x2;
1580 *y2 = wx_stack_top->y2;
1581 *x3 = wx_stack_top->x3;
1582 *y3 = wx_stack_top->y3;
1583 *x4 = wx_stack_top->x4;
1584 *y4 = wx_stack_top->y4;
1585 return (1);
1586 }
1587
1588 static bool wx_spline_add_point(double x, double y)
1589 {
1590 wxPoint *point = new wxPoint;
1591 point->x = (int) x;
1592 point->y = (int) y;
1593 wx_spline_point_list.Append((wxObject*)point);
1594 return TRUE;
1595 }
1596
1597 static void wx_spline_draw_point_array(wxDC *dc)
1598 {
1599 dc->DrawLines(&wx_spline_point_list, 0, 0);
1600 wxNode *node = wx_spline_point_list.First();
1601 while (node)
1602 {
1603 wxPoint *point = (wxPoint *)node->Data();
1604 delete point;
1605 delete node;
1606 node = wx_spline_point_list.First();
1607 }
1608 }
1609
1610 wxSpline::wxSpline(wxList *list)
1611 {
1612 points = list;
1613 }
1614
1615 wxSpline::~wxSpline()
1616 {
1617 }
1618
1619 void wxSpline::DeletePoints()
1620 {
1621 for(wxNode *node = points->First(); node; node = points->First())
1622 {
1623 wxPoint *point = (wxPoint *)node->Data();
1624 delete point;
1625 delete node;
1626 }
1627 delete points;
1628 }
1629
1630
1631 #endif // wxUSE_SPLINES
1632