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added wxUSE_TOOLBAR_SIMPLE setting, enabled wxLongLong in configure by default
[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
738 // "bottom left" and "bottom right"
739 x += (wxCoord)(h*sin(rad));
740 y += (wxCoord)(h*cos(rad));
741 CalcBoundingBox(x, y);
742 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
743 }
744 }
745
746 // ---------------------------------------------------------------------------
747 // set GDI objects
748 // ---------------------------------------------------------------------------
749
750 void wxDC::SetPalette(const wxPalette& palette)
751 {
752 // Set the old object temporarily, in case the assignment deletes an object
753 // that's not yet selected out.
754 if (m_oldPalette)
755 {
756 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
757 m_oldPalette = 0;
758 }
759
760 m_palette = palette;
761
762 if (!m_palette.Ok())
763 {
764 // Setting a NULL colourmap is a way of restoring
765 // the original colourmap
766 if (m_oldPalette)
767 {
768 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
769 m_oldPalette = 0;
770 }
771
772 return;
773 }
774
775 if (m_palette.Ok() && m_palette.GetHPALETTE())
776 {
777 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
778 if (!m_oldPalette)
779 m_oldPalette = (WXHPALETTE) oldPal;
780
781 ::RealizePalette(GetHdc());
782 }
783 }
784
785 void wxDC::SetFont(const wxFont& the_font)
786 {
787 // Set the old object temporarily, in case the assignment deletes an object
788 // that's not yet selected out.
789 if (m_oldFont)
790 {
791 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
792 m_oldFont = 0;
793 }
794
795 m_font = the_font;
796
797 if (!the_font.Ok())
798 {
799 if (m_oldFont)
800 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
801 m_oldFont = 0;
802 }
803
804 if (m_font.Ok() && m_font.GetResourceHandle())
805 {
806 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
807 if (f == (HFONT) NULL)
808 {
809 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
810 }
811 if (!m_oldFont)
812 m_oldFont = (WXHFONT) f;
813 }
814 }
815
816 void wxDC::SetPen(const wxPen& pen)
817 {
818 // Set the old object temporarily, in case the assignment deletes an object
819 // that's not yet selected out.
820 if (m_oldPen)
821 {
822 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
823 m_oldPen = 0;
824 }
825
826 m_pen = pen;
827
828 if (!m_pen.Ok())
829 {
830 if (m_oldPen)
831 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
832 m_oldPen = 0;
833 }
834
835 if (m_pen.Ok())
836 {
837 if (m_pen.GetResourceHandle())
838 {
839 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
840 if (!m_oldPen)
841 m_oldPen = (WXHPEN) p;
842 }
843 }
844 }
845
846 void wxDC::SetBrush(const wxBrush& brush)
847 {
848 // Set the old object temporarily, in case the assignment deletes an object
849 // that's not yet selected out.
850 if (m_oldBrush)
851 {
852 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
853 m_oldBrush = 0;
854 }
855
856 m_brush = brush;
857
858 if (!m_brush.Ok())
859 {
860 if (m_oldBrush)
861 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
862 m_oldBrush = 0;
863 }
864
865 if (m_brush.Ok())
866 {
867 if (m_brush.GetResourceHandle())
868 {
869 HBRUSH b = 0;
870 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
871 if (!m_oldBrush)
872 m_oldBrush = (WXHBRUSH) b;
873 }
874 }
875 }
876
877 void wxDC::SetBackground(const wxBrush& brush)
878 {
879 m_backgroundBrush = brush;
880
881 if (!m_backgroundBrush.Ok())
882 return;
883
884 if (m_canvas)
885 {
886 bool customColours = TRUE;
887 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
888 // change background colours from the control-panel specified colours.
889 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
890 customColours = FALSE;
891
892 if (customColours)
893 {
894 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
895 {
896 m_canvas->SetTransparent(TRUE);
897 }
898 else
899 {
900 // New behaviour, 10/2/99: setting the background brush of a DC
901 // doesn't affect the window background colour. However,
902 // I'm leaving in the transparency setting because it's needed by
903 // various controls (e.g. wxStaticText) to determine whether to draw
904 // transparently or not. TODO: maybe this should be a new function
905 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
906 // parent?
907 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
908 m_canvas->SetTransparent(FALSE);
909 }
910 }
911 }
912 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
913 {
914 (void)SetBkColor(GetHdc(), new_color);
915 }
916 }
917
918 void wxDC::SetBackgroundMode(int mode)
919 {
920 m_backgroundMode = mode;
921
922 // SetBackgroundColour now only refers to text background
923 // and m_backgroundMode is used there
924
925 /*
926 if (m_backgroundMode == wxTRANSPARENT)
927 ::SetBkMode(GetHdc(), TRANSPARENT);
928 else
929 ::SetBkMode(GetHdc(), OPAQUE);
930 */
931 }
932
933 void wxDC::SetLogicalFunction(int function)
934 {
935 m_logicalFunction = function;
936
937 SetRop((WXHDC) m_hDC);
938 }
939
940 void wxDC::SetRop(WXHDC dc)
941 {
942 if (!dc || m_logicalFunction < 0)
943 return;
944
945 int c_rop;
946 // These may be wrong
947 switch (m_logicalFunction)
948 {
949 // case wxXOR: c_rop = R2_XORPEN; break;
950 case wxXOR: c_rop = R2_NOTXORPEN; break;
951 case wxINVERT: c_rop = R2_NOT; break;
952 case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break;
953 case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break;
954 case wxCLEAR: c_rop = R2_WHITE; break;
955 case wxSET: c_rop = R2_BLACK; break;
956 case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break;
957 case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break;
958 case wxAND: c_rop = R2_MASKPEN; break;
959 case wxOR: c_rop = R2_MERGEPEN; break;
960 case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break;
961 case wxEQUIV:
962 case wxNAND:
963 case wxCOPY:
964 default:
965 c_rop = R2_COPYPEN; break;
966 }
967 SetROP2((HDC) dc, c_rop);
968 }
969
970 bool wxDC::StartDoc(const wxString& message)
971 {
972 // We might be previewing, so return TRUE to let it continue.
973 return TRUE;
974 }
975
976 void wxDC::EndDoc()
977 {
978 }
979
980 void wxDC::StartPage()
981 {
982 }
983
984 void wxDC::EndPage()
985 {
986 }
987
988 // ---------------------------------------------------------------------------
989 // text metrics
990 // ---------------------------------------------------------------------------
991
992 wxCoord wxDC::GetCharHeight() const
993 {
994 TEXTMETRIC lpTextMetric;
995
996 GetTextMetrics(GetHdc(), &lpTextMetric);
997
998 return YDEV2LOGREL(lpTextMetric.tmHeight);
999 }
1000
1001 wxCoord wxDC::GetCharWidth() const
1002 {
1003 TEXTMETRIC lpTextMetric;
1004
1005 GetTextMetrics(GetHdc(), &lpTextMetric);
1006
1007 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1008 }
1009
1010 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1011 wxCoord *descent, wxCoord *externalLeading,
1012 wxFont *theFont) const
1013 {
1014 wxFont *fontToUse = (wxFont*) theFont;
1015 if (!fontToUse)
1016 fontToUse = (wxFont*) &m_font;
1017
1018 SIZE sizeRect;
1019 TEXTMETRIC tm;
1020
1021 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1022 GetTextMetrics(GetHdc(), &tm);
1023
1024 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1025 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1026 if (descent) *descent = tm.tmDescent;
1027 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1028 }
1029
1030 void wxDC::SetMapMode(int mode)
1031 {
1032 m_mappingMode = mode;
1033
1034 int pixel_width = 0;
1035 int pixel_height = 0;
1036 int mm_width = 0;
1037 int mm_height = 0;
1038
1039 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1040 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1041 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1042 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1043
1044 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1045 {
1046 return;
1047 }
1048
1049 double mm2pixelsX = pixel_width/mm_width;
1050 double mm2pixelsY = pixel_height/mm_height;
1051
1052 switch (mode)
1053 {
1054 case wxMM_TWIPS:
1055 {
1056 m_logicalScaleX = (twips2mm * mm2pixelsX);
1057 m_logicalScaleY = (twips2mm * mm2pixelsY);
1058 break;
1059 }
1060 case wxMM_POINTS:
1061 {
1062 m_logicalScaleX = (pt2mm * mm2pixelsX);
1063 m_logicalScaleY = (pt2mm * mm2pixelsY);
1064 break;
1065 }
1066 case wxMM_METRIC:
1067 {
1068 m_logicalScaleX = mm2pixelsX;
1069 m_logicalScaleY = mm2pixelsY;
1070 break;
1071 }
1072 case wxMM_LOMETRIC:
1073 {
1074 m_logicalScaleX = (mm2pixelsX/10.0);
1075 m_logicalScaleY = (mm2pixelsY/10.0);
1076 break;
1077 }
1078 default:
1079 case wxMM_TEXT:
1080 {
1081 m_logicalScaleX = 1.0;
1082 m_logicalScaleY = 1.0;
1083 break;
1084 }
1085 }
1086
1087 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1088 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1089
1090 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1091 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1092 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1093 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1094 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1095 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1096 }
1097
1098 void wxDC::SetUserScale(double x, double y)
1099 {
1100 m_userScaleX = x;
1101 m_userScaleY = y;
1102
1103 SetMapMode(m_mappingMode);
1104 }
1105
1106 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1107 {
1108 m_signX = xLeftRight ? 1 : -1;
1109 m_signY = yBottomUp ? -1 : 1;
1110
1111 SetMapMode(m_mappingMode);
1112 }
1113
1114 void wxDC::SetSystemScale(double x, double y)
1115 {
1116 m_scaleX = x;
1117 m_scaleY = y;
1118
1119 SetMapMode(m_mappingMode);
1120 }
1121
1122 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1123 {
1124 m_logicalOriginX = x;
1125 m_logicalOriginY = y;
1126
1127 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1128 }
1129
1130 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1131 {
1132 m_deviceOriginX = x;
1133 m_deviceOriginY = y;
1134
1135 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1136 }
1137
1138 // ---------------------------------------------------------------------------
1139 // coordinates transformations
1140 // ---------------------------------------------------------------------------
1141
1142 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1143 {
1144 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1145 }
1146
1147 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1148 {
1149 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1150 }
1151
1152 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1153 {
1154 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1155 }
1156
1157 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1158 {
1159 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1160 }
1161
1162 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1163 {
1164 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1165 }
1166
1167 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1168 {
1169 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1170 }
1171
1172 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1173 {
1174 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1175 }
1176
1177 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1178 {
1179 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1180 }
1181
1182 // ---------------------------------------------------------------------------
1183 // bit blit
1184 // ---------------------------------------------------------------------------
1185 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
1186 wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop, bool useMask)
1187 {
1188 wxCoord xdest1 = xdest;
1189 wxCoord ydest1 = ydest;
1190 wxCoord xsrc1 = xsrc;
1191 wxCoord ysrc1 = ysrc;
1192
1193 // Chris Breeze 18/5/98: use text foreground/background colours
1194 // when blitting from 1-bit bitmaps
1195 COLORREF old_textground = ::GetTextColor(GetHdc());
1196 COLORREF old_background = ::GetBkColor(GetHdc());
1197 if (m_textForegroundColour.Ok())
1198 {
1199 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1200 }
1201 if (m_textBackgroundColour.Ok())
1202 {
1203 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1204 }
1205
1206 DWORD dwRop = rop == wxCOPY ? SRCCOPY :
1207 rop == wxCLEAR ? WHITENESS :
1208 rop == wxSET ? BLACKNESS :
1209 rop == wxINVERT ? DSTINVERT :
1210 rop == wxAND ? MERGECOPY :
1211 rop == wxOR ? MERGEPAINT :
1212 rop == wxSRC_INVERT ? NOTSRCCOPY :
1213 rop == wxXOR ? SRCINVERT :
1214 rop == wxOR_REVERSE ? MERGEPAINT :
1215 rop == wxAND_REVERSE ? SRCERASE :
1216 rop == wxSRC_OR ? SRCPAINT :
1217 rop == wxSRC_AND ? SRCAND :
1218 SRCCOPY;
1219
1220 bool success = TRUE;
1221 if (useMask && source->m_selectedBitmap.Ok() && source->m_selectedBitmap.GetMask())
1222 {
1223
1224 #if 0 // __WIN32__
1225 // Not implemented under Win95 (or maybe a specific device?)
1226 if (MaskBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1227 (HDC) source->m_hDC, xsrc1, ysrc1, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap(),
1228 0, 0, 0xAACC0020))
1229 {
1230 // Success
1231 }
1232 else
1233 #endif
1234 {
1235 // Old code
1236 #if 0
1237 HDC dc_mask = CreateCompatibleDC((HDC) source->m_hDC);
1238 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1239 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1240 dc_mask, xsrc1, ysrc1, 0x00220326 /* NOTSRCAND */) != 0);
1241 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1242 (HDC) source->m_hDC, xsrc1, ysrc1, SRCPAINT) != 0);
1243 ::SelectObject(dc_mask, 0);
1244 ::DeleteDC(dc_mask);
1245 #endif
1246 // New code from Chris Breeze, 15/7/98
1247 // Blit bitmap with mask
1248
1249 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1250 {
1251 // If we are printing source colours are screen colours
1252 // not printer colours and so we need copy the bitmap
1253 // pixel by pixel.
1254 RECT rect;
1255 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1256 HDC dc_src = (HDC) source->m_hDC;
1257
1258 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1259 for (int x = 0; x < width; x++)
1260 {
1261 for (int y = 0; y < height; y++)
1262 {
1263 COLORREF cref = ::GetPixel(dc_mask, x, y);
1264 if (cref)
1265 {
1266 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1267 rect.left = xdest1 + x; rect.right = rect.left + 1;
1268 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1269 ::FillRect(GetHdc(), &rect, brush);
1270 ::DeleteObject(brush);
1271 }
1272 }
1273 }
1274 ::SelectObject(dc_mask, 0);
1275 ::DeleteDC(dc_mask);
1276 }
1277 else
1278 {
1279 // create a temp buffer bitmap and DCs to access it and the mask
1280 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1281 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1282 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1283 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1284 ::SelectObject(dc_buffer, buffer_bmap);
1285
1286 // copy dest to buffer
1287 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1288 GetHdc(), xdest1, ydest1, SRCCOPY);
1289
1290 // copy src to buffer using selected raster op
1291 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1292 (HDC) source->m_hDC, xsrc1, ysrc1, dwRop);
1293
1294 // set masked area in buffer to BLACK (pixel value 0)
1295 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1296 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1297 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1298 dc_mask, xsrc1, ysrc1, SRCAND);
1299
1300 // set unmasked area in dest to BLACK
1301 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1302 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1303 ::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1304 dc_mask, xsrc1, ysrc1, SRCAND);
1305 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1306 ::SetTextColor(GetHdc(), prevCol);
1307
1308 // OR buffer to dest
1309 success = (::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1310 dc_buffer, 0, 0, SRCPAINT) != 0);
1311
1312 // tidy up temporary DCs and bitmap
1313 ::SelectObject(dc_mask, 0);
1314 ::DeleteDC(dc_mask);
1315 ::SelectObject(dc_buffer, 0);
1316 ::DeleteDC(dc_buffer);
1317 ::DeleteObject(buffer_bmap);
1318 }
1319 }
1320 }
1321 else
1322 {
1323 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1324 {
1325 // If we are printing, source colours are screen colours
1326 // not printer colours and so we need copy the bitmap
1327 // pixel by pixel.
1328 HDC dc_src = (HDC) source->m_hDC;
1329 RECT rect;
1330 for (int x = 0; x < width; x++)
1331 {
1332 for (int y = 0; y < height; y++)
1333 {
1334 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1335 rect.left = xdest1 + x; rect.right = rect.left + 1;
1336 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1337 ::FillRect(GetHdc(), &rect, brush);
1338 ::DeleteObject(brush);
1339 }
1340 }
1341 }
1342 else
1343 {
1344 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height, (HDC) source->m_hDC,
1345 xsrc1, ysrc1, dwRop) != 0);
1346 }
1347 }
1348 ::SetTextColor(GetHdc(), old_textground);
1349 ::SetBkColor(GetHdc(), old_background);
1350
1351 return success;
1352 }
1353
1354 void wxDC::DoGetSize(int *w, int *h) const
1355 {
1356 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1357 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1358 }
1359
1360 void wxDC::DoGetSizeMM(int *w, int *h) const
1361 {
1362 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1363 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1364 }
1365
1366 wxSize wxDC::GetPPI() const
1367 {
1368 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1369 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1370
1371 return wxSize(x, y);
1372 }
1373
1374 // For use by wxWindows only, unless custom units are required.
1375 void wxDC::SetLogicalScale(double x, double y)
1376 {
1377 m_logicalScaleX = x;
1378 m_logicalScaleY = y;
1379 }
1380
1381 #if WXWIN_COMPATIBILITY
1382 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1383 float *descent, float *externalLeading,
1384 wxFont *theFont, bool use16bit) const
1385 {
1386 wxCoord x1, y1, descent1, externalLeading1;
1387 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1388 *x = x1; *y = y1;
1389 if (descent)
1390 *descent = descent1;
1391 if (externalLeading)
1392 *externalLeading = externalLeading1;
1393 }
1394 #endif
1395
1396 // ---------------------------------------------------------------------------
1397 // spline drawing code
1398 // ---------------------------------------------------------------------------
1399
1400 #if wxUSE_SPLINES
1401
1402 class wxSpline: public wxObject
1403 {
1404 public:
1405 int type;
1406 wxList *points;
1407
1408 wxSpline(wxList *list);
1409 void DeletePoints();
1410
1411 // Doesn't delete points
1412 ~wxSpline();
1413 };
1414
1415 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1416
1417 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1418 double a3, double b3, double a4, double b4);
1419 void wx_clear_stack();
1420 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1421 double *y3, double *x4, double *y4);
1422 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1423 double x4, double y4);
1424 static bool wx_spline_add_point(double x, double y);
1425 static void wx_spline_draw_point_array(wxDC *dc);
1426 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1427
1428 void wxDC::DoDrawSpline(wxList *list)
1429 {
1430 wxSpline spline(list);
1431
1432 wx_draw_open_spline(this, &spline);
1433 }
1434
1435 wxList wx_spline_point_list;
1436
1437 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1438 {
1439 wxPoint *p;
1440 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1441 double x1, y1, x2, y2;
1442
1443 wxNode *node = spline->points->First();
1444 p = (wxPoint *)node->Data();
1445
1446 x1 = p->x;
1447 y1 = p->y;
1448
1449 node = node->Next();
1450 p = (wxPoint *)node->Data();
1451
1452 x2 = p->x;
1453 y2 = p->y;
1454 cx1 = (double)((x1 + x2) / 2);
1455 cy1 = (double)((y1 + y2) / 2);
1456 cx2 = (double)((cx1 + x2) / 2);
1457 cy2 = (double)((cy1 + y2) / 2);
1458
1459 wx_spline_add_point(x1, y1);
1460
1461 while ((node = node->Next()) != NULL)
1462 {
1463 p = (wxPoint *)node->Data();
1464 x1 = x2;
1465 y1 = y2;
1466 x2 = p->x;
1467 y2 = p->y;
1468 cx4 = (double)(x1 + x2) / 2;
1469 cy4 = (double)(y1 + y2) / 2;
1470 cx3 = (double)(x1 + cx4) / 2;
1471 cy3 = (double)(y1 + cy4) / 2;
1472
1473 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1474
1475 cx1 = cx4;
1476 cy1 = cy4;
1477 cx2 = (double)(cx1 + x2) / 2;
1478 cy2 = (double)(cy1 + y2) / 2;
1479 }
1480
1481 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1482 wx_spline_add_point(x2, y2);
1483
1484 wx_spline_draw_point_array(dc);
1485
1486 }
1487
1488 /********************* CURVES FOR SPLINES *****************************
1489
1490 The following spline drawing routine is from
1491
1492 "An Algorithm for High-Speed Curve Generation"
1493 by George Merrill Chaikin,
1494 Computer Graphics and Image Processing, 3, Academic Press,
1495 1974, 346-349.
1496
1497 and
1498
1499 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1500 Computer Graphics and Image Processing, 4, Academic Press,
1501 1975, 304-310.
1502
1503 ***********************************************************************/
1504
1505 #define half(z1, z2) ((z1+z2)/2.0)
1506 #define THRESHOLD 5
1507
1508 /* iterative version */
1509
1510 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1511 double b4)
1512 {
1513 register double xmid, ymid;
1514 double x1, y1, x2, y2, x3, y3, x4, y4;
1515
1516 wx_clear_stack();
1517 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1518
1519 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1520 xmid = (double)half(x2, x3);
1521 ymid = (double)half(y2, y3);
1522 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1523 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1524 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1525 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1526 } else {
1527 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1528 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1529 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1530 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1531 }
1532 }
1533 }
1534
1535
1536 /* utilities used by spline drawing routines */
1537
1538
1539 typedef struct wx_spline_stack_struct {
1540 double x1, y1, x2, y2, x3, y3, x4, y4;
1541 }
1542 Stack;
1543
1544 #define SPLINE_STACK_DEPTH 20
1545 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1546 static Stack *wx_stack_top;
1547 static int wx_stack_count;
1548
1549 void wx_clear_stack()
1550 {
1551 wx_stack_top = wx_spline_stack;
1552 wx_stack_count = 0;
1553 }
1554
1555 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1556 {
1557 wx_stack_top->x1 = x1;
1558 wx_stack_top->y1 = y1;
1559 wx_stack_top->x2 = x2;
1560 wx_stack_top->y2 = y2;
1561 wx_stack_top->x3 = x3;
1562 wx_stack_top->y3 = y3;
1563 wx_stack_top->x4 = x4;
1564 wx_stack_top->y4 = y4;
1565 wx_stack_top++;
1566 wx_stack_count++;
1567 }
1568
1569 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1570 double *x3, double *y3, double *x4, double *y4)
1571 {
1572 if (wx_stack_count == 0)
1573 return (0);
1574 wx_stack_top--;
1575 wx_stack_count--;
1576 *x1 = wx_stack_top->x1;
1577 *y1 = wx_stack_top->y1;
1578 *x2 = wx_stack_top->x2;
1579 *y2 = wx_stack_top->y2;
1580 *x3 = wx_stack_top->x3;
1581 *y3 = wx_stack_top->y3;
1582 *x4 = wx_stack_top->x4;
1583 *y4 = wx_stack_top->y4;
1584 return (1);
1585 }
1586
1587 static bool wx_spline_add_point(double x, double y)
1588 {
1589 wxPoint *point = new wxPoint;
1590 point->x = (int) x;
1591 point->y = (int) y;
1592 wx_spline_point_list.Append((wxObject*)point);
1593 return TRUE;
1594 }
1595
1596 static void wx_spline_draw_point_array(wxDC *dc)
1597 {
1598 dc->DrawLines(&wx_spline_point_list, 0, 0);
1599 wxNode *node = wx_spline_point_list.First();
1600 while (node)
1601 {
1602 wxPoint *point = (wxPoint *)node->Data();
1603 delete point;
1604 delete node;
1605 node = wx_spline_point_list.First();
1606 }
1607 }
1608
1609 wxSpline::wxSpline(wxList *list)
1610 {
1611 points = list;
1612 }
1613
1614 wxSpline::~wxSpline()
1615 {
1616 }
1617
1618 void wxSpline::DeletePoints()
1619 {
1620 for(wxNode *node = points->First(); node; node = points->First())
1621 {
1622 wxPoint *point = (wxPoint *)node->Data();
1623 delete point;
1624 delete node;
1625 }
1626 delete points;
1627 }
1628
1629
1630 #endif // wxUSE_SPLINES
1631
wxWidgets (Impactor)