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[wxWidgets.git] / src / msw / dc.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: dc.cpp
3 // Purpose: wxDC class
4 // Author: Julian Smart
5 // Modified by:
6 // Created: 01/02/97
7 // RCS-ID: $Id$
8 // Copyright: (c) Julian Smart and Markus Holzem
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ===========================================================================
13 // declarations
14 // ===========================================================================
15
16 // ---------------------------------------------------------------------------
17 // headers
18 // ---------------------------------------------------------------------------
19
20 #ifdef __GNUG__
21 #pragma implementation "dc.h"
22 #endif
23
24 // For compilers that support precompilation, includes "wx.h".
25 #include "wx/wxprec.h"
26
27 #ifdef __BORLANDC__
28 #pragma hdrstop
29 #endif
30
31 #ifndef WX_PRECOMP
32 #include "wx/window.h"
33 #include "wx/dc.h"
34 #include "wx/utils.h"
35 #include "wx/dialog.h"
36 #include "wx/app.h"
37 #include "wx/bitmap.h"
38 #include "wx/dcmemory.h"
39 #include "wx/log.h"
40 #include "wx/icon.h"
41 #endif
42
43 #include "wx/dcprint.h"
44
45 #include <string.h>
46 #include <math.h>
47
48 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
49
50 #if wxUSE_COMMON_DIALOGS
51 #include <commdlg.h>
52 #endif
53
54 #ifndef __WIN32__
55 #include <print.h>
56 #endif
57
58 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
59
60 // ---------------------------------------------------------------------------
61 // constants
62 // ---------------------------------------------------------------------------
63
64 static const int VIEWPORT_EXTENT = 1000;
65
66 static const int MM_POINTS = 9;
67 static const int MM_METRIC = 10;
68
69 // usually this is defined in math.h
70 #ifndef M_PI
71 static const double M_PI = 3.14159265358979323846;
72 #endif // M_PI
73
74 // ROPs which don't have standard names (see "Ternary Raster Operations" in the
75 // MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
76 #define DSTCOPY 0x00AA0029 // a.k.a. NOP operation
77
78 // ---------------------------------------------------------------------------
79 // private functions
80 // ---------------------------------------------------------------------------
81
82 // convert degrees to radians
83 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
84
85 // ===========================================================================
86 // implementation
87 // ===========================================================================
88
89 // ---------------------------------------------------------------------------
90 // wxDC
91 // ---------------------------------------------------------------------------
92
93 // Default constructor
94 wxDC::wxDC()
95 {
96 m_canvas = NULL;
97
98 m_oldBitmap = 0;
99 m_oldPen = 0;
100 m_oldBrush = 0;
101 m_oldFont = 0;
102 m_oldPalette = 0;
103
104 m_bOwnsDC = FALSE;
105 m_hDC = 0;
106
107 m_windowExtX = VIEWPORT_EXTENT;
108 m_windowExtY = VIEWPORT_EXTENT;
109
110 m_hDCCount = 0;
111 }
112
113
114 wxDC::~wxDC()
115 {
116 if ( m_hDC != 0 ) {
117 SelectOldObjects(m_hDC);
118 if ( m_bOwnsDC ) {
119 if ( m_canvas == NULL )
120 ::DeleteDC(GetHdc());
121 else
122 ::ReleaseDC((HWND)m_canvas->GetHWND(), GetHdc());
123 }
124 }
125
126 }
127
128 // This will select current objects out of the DC,
129 // which is what you have to do before deleting the
130 // DC.
131 void wxDC::SelectOldObjects(WXHDC dc)
132 {
133 if (dc)
134 {
135 if (m_oldBitmap)
136 {
137 ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
138 if (m_selectedBitmap.Ok())
139 {
140 m_selectedBitmap.SetSelectedInto(NULL);
141 }
142 }
143 m_oldBitmap = 0;
144 if (m_oldPen)
145 {
146 ::SelectObject((HDC) dc, (HPEN) m_oldPen);
147 }
148 m_oldPen = 0;
149 if (m_oldBrush)
150 {
151 ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
152 }
153 m_oldBrush = 0;
154 if (m_oldFont)
155 {
156 ::SelectObject((HDC) dc, (HFONT) m_oldFont);
157 }
158 m_oldFont = 0;
159 if (m_oldPalette)
160 {
161 ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE);
162 }
163 m_oldPalette = 0;
164 }
165
166 m_brush = wxNullBrush;
167 m_pen = wxNullPen;
168 m_palette = wxNullPalette;
169 m_font = wxNullFont;
170 m_backgroundBrush = wxNullBrush;
171 m_selectedBitmap = wxNullBitmap;
172 }
173
174 // ---------------------------------------------------------------------------
175 // clipping
176 // ---------------------------------------------------------------------------
177
178 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
179 {
180 m_clipping = TRUE;
181 m_clipX1 = (int)cx;
182 m_clipY1 = (int)cy;
183 m_clipX2 = (int)(cx + cw);
184 m_clipY2 = (int)(cy + ch);
185
186 DoClipping((WXHDC) m_hDC);
187 }
188
189 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
190 {
191 wxCHECK_RET( region.GetHRGN(), wxT("invalid clipping region") );
192
193 wxRect box = region.GetBox();
194
195 m_clipping = TRUE;
196 m_clipX1 = box.x;
197 m_clipY1 = box.y;
198 m_clipX2 = box.x + box.width;
199 m_clipY2 = box.y + box.height;
200
201 #ifdef __WIN16__
202 SelectClipRgn(GetHdc(), (HRGN) region.GetHRGN());
203 #else
204 ExtSelectClipRgn(GetHdc(), (HRGN) region.GetHRGN(), RGN_AND);
205 #endif
206 }
207
208 void wxDC::DoClipping(WXHDC dc)
209 {
210 if (m_clipping && dc)
211 {
212 IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1), YLOG2DEV(m_clipY1),
213 XLOG2DEV(m_clipX2), YLOG2DEV(m_clipY2));
214 }
215 }
216
217 void wxDC::DestroyClippingRegion()
218 {
219 if (m_clipping && m_hDC)
220 {
221 // TODO: this should restore the previous clipping region,
222 // so that OnPaint processing works correctly, and the update clipping region
223 // doesn't get destroyed after the first DestroyClippingRegion.
224 HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
225 SelectClipRgn(GetHdc(), rgn);
226 DeleteObject(rgn);
227 }
228 m_clipping = FALSE;
229 }
230
231 // ---------------------------------------------------------------------------
232 // query capabilities
233 // ---------------------------------------------------------------------------
234
235 bool wxDC::CanDrawBitmap() const
236 {
237 return TRUE;
238 }
239
240 bool wxDC::CanGetTextExtent() const
241 {
242 // What sort of display is it?
243 int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
244
245 return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
246 }
247
248 int wxDC::GetDepth() const
249 {
250 return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
251 }
252
253 // ---------------------------------------------------------------------------
254 // drawing
255 // ---------------------------------------------------------------------------
256
257 void wxDC::Clear()
258 {
259 RECT rect;
260 if ( m_canvas )
261 {
262 GetClientRect((HWND) m_canvas->GetHWND(), &rect);
263 }
264 else
265 {
266 // No, I think we should simply ignore this if printing on e.g.
267 // a printer DC.
268 // wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") );
269 if (!m_selectedBitmap.Ok())
270 return;
271
272 rect.left = 0; rect.top = 0;
273 rect.right = m_selectedBitmap.GetWidth();
274 rect.bottom = m_selectedBitmap.GetHeight();
275 }
276
277 (void) ::SetMapMode(GetHdc(), MM_TEXT);
278
279 DWORD colour = GetBkColor(GetHdc());
280 HBRUSH brush = CreateSolidBrush(colour);
281 FillRect(GetHdc(), &rect, brush);
282 DeleteObject(brush);
283
284 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
285 ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
286 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
287 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
288 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
289 }
290
291 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
292 {
293 if ( !::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
294 col.GetPixel(),
295 style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
296 : FLOODFILLBORDER) )
297 {
298 // quoting from the MSDN docs:
299 //
300 // Following are some of the reasons this function might fail:
301 //
302 // * The filling could not be completed.
303 // * The specified point has the boundary color specified by the
304 // crColor parameter (if FLOODFILLBORDER was requested).
305 // * The specified point does not have the color specified by
306 // crColor (if FLOODFILLSURFACE was requested)
307 // * The point is outside the clipping region that is, it is not
308 // visible on the device.
309 //
310 wxLogLastError("ExtFloodFill");
311 }
312
313 CalcBoundingBox(x, y);
314 }
315
316 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
317 {
318 // get the color of the pixel
319 COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
320
321 // get the color of the pen
322 COLORREF pencolor = 0x00ffffff;
323 if (m_pen.Ok())
324 {
325 pencolor = m_pen.GetColour().GetPixel();
326 }
327
328 // return the color of the pixel
329 if( col )
330 {
331 col->Set(GetRValue(pixelcolor),
332 GetGValue(pixelcolor),
333 GetBValue(pixelcolor));
334 }
335
336 // check, if color of the pixels is the same as the color of the current
337 // pen and return TRUE if it is, FALSE otherwise
338 return pixelcolor == pencolor;
339 }
340
341 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
342 {
343 wxCoord x1 = x-VIEWPORT_EXTENT;
344 wxCoord y1 = y-VIEWPORT_EXTENT;
345 wxCoord x2 = x+VIEWPORT_EXTENT;
346 wxCoord y2 = y+VIEWPORT_EXTENT;
347
348 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
349 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
350
351 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
352 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
353
354 CalcBoundingBox(x1, y1);
355 CalcBoundingBox(x2, y2);
356 }
357
358 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
359 {
360 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
361 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
362
363 /* MATTHEW: [6] New normalization */
364 #if WX_STANDARD_GRAPHICS
365 (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
366 #endif
367
368 CalcBoundingBox(x1, y1);
369 CalcBoundingBox(x2, y2);
370 }
371
372 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
373 {
374 double dx = xc-x1;
375 double dy = yc-y1;
376 double radius = (double)sqrt(dx*dx+dy*dy) ;;
377 if (x1==x2 && x2==y2)
378 {
379 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
380 return;
381 }
382
383 wxCoord xx1 = XLOG2DEV(x1);
384 wxCoord yy1 = YLOG2DEV(y1);
385 wxCoord xx2 = XLOG2DEV(x2);
386 wxCoord yy2 = YLOG2DEV(y2);
387 wxCoord xxc = XLOG2DEV(xc);
388 wxCoord yyc = YLOG2DEV(yc);
389 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
390
391 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
392 wxCoord xxx1 = (wxCoord) (xxc-ray);
393 wxCoord yyy1 = (wxCoord) (yyc-ray);
394 wxCoord xxx2 = (wxCoord) (xxc+ray);
395 wxCoord yyy2 = (wxCoord) (yyc+ray);
396 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
397 {
398 // Have to add 1 to bottom-right corner of rectangle
399 // to make semi-circles look right (crooked line otherwise).
400 // Unfortunately this is not a reliable method, depends
401 // on the size of shape.
402 // TODO: figure out why this happens!
403 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
404 xx1,yy1,xx2,yy2);
405 }
406 else
407 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
408 xx1,yy1,xx2,yy2);
409
410 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
411 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
412 }
413
414 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
415 {
416 COLORREF color = 0x00ffffff;
417 if (m_pen.Ok())
418 {
419 color = m_pen.GetColour().GetPixel();
420 }
421
422 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
423
424 CalcBoundingBox(x, y);
425 }
426
427 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
428 {
429 COLORREF old_textground = ::GetTextColor(GetHdc());
430 COLORREF old_background = ::GetBkColor(GetHdc());
431 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
432 {
433
434 if (m_textForegroundColour.Ok())
435 { //just the oposite from what is expected see help on pattern brush
436 // 1 in mask becomes bk color
437 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel() );
438 }
439 if (m_textBackgroundColour.Ok())
440 { //just the oposite from what is expected
441 // 0 in mask becomes text color
442 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel() );
443 }
444
445 if (m_backgroundMode == wxTRANSPARENT)
446 SetBkMode(GetHdc(), TRANSPARENT);
447 else
448 SetBkMode(GetHdc(), OPAQUE);
449 }
450
451 // Do things less efficiently if we have offsets
452 if (xoffset != 0 || yoffset != 0)
453 {
454 POINT *cpoints = new POINT[n];
455 int i;
456 for (i = 0; i < n; i++)
457 {
458 cpoints[i].x = (int)(points[i].x + xoffset);
459 cpoints[i].y = (int)(points[i].y + yoffset);
460
461 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
462 }
463 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
464 (void)Polygon(GetHdc(), cpoints, n);
465 SetPolyFillMode(GetHdc(),prev);
466 delete[] cpoints;
467 }
468 else
469 {
470 int i;
471 for (i = 0; i < n; i++)
472 CalcBoundingBox(points[i].x, points[i].y);
473
474 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
475 (void)Polygon(GetHdc(), (POINT*) points, n);
476 SetPolyFillMode(GetHdc(),prev);
477 }
478
479 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
480 {
481 ::SetBkMode(GetHdc(), TRANSPARENT);
482 ::SetTextColor(GetHdc(), old_textground);
483 ::SetBkColor(GetHdc(), old_background);
484 }
485 }
486
487 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
488 {
489 // Do things less efficiently if we have offsets
490 if (xoffset != 0 || yoffset != 0)
491 {
492 POINT *cpoints = new POINT[n];
493 int i;
494 for (i = 0; i < n; i++)
495 {
496 cpoints[i].x = (int)(points[i].x + xoffset);
497 cpoints[i].y = (int)(points[i].y + yoffset);
498
499 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
500 }
501 (void)Polyline(GetHdc(), cpoints, n);
502 delete[] cpoints;
503 }
504 else
505 {
506 int i;
507 for (i = 0; i < n; i++)
508 CalcBoundingBox(points[i].x, points[i].y);
509
510 (void)Polyline(GetHdc(), (POINT*) points, n);
511 }
512 }
513
514 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
515 {
516 COLORREF colFgOld = 0,
517 colBgOld = 0;
518
519 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
520 {
521 colFgOld = ::GetTextColor(GetHdc());
522 colBgOld = ::GetBkColor(GetHdc());
523
524 if ( m_textForegroundColour.Ok() )
525 {
526 // just the oposite from what is expected see help on pattern brush
527 // 1 in mask becomes bk color
528 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel());
529 }
530
531 if ( m_textBackgroundColour.Ok() )
532 {
533 // 0 in mask becomes text color
534 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel());
535 }
536
537 // VZ: IMHO this does strictly nothing here
538 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
539 : OPAQUE);
540 }
541
542 wxCoord x2 = x + width;
543 wxCoord y2 = y + height;
544
545 // Windows draws the filled rectangles without outline (i.e. drawn with a
546 // transparent pen) one pixel smaller in both directions and we want them
547 // to have the same size regardless of which pen is used - adjust
548 if ( m_pen.GetStyle() == wxTRANSPARENT )
549 {
550 x2++;
551 y2++;
552 }
553
554 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
555
556 CalcBoundingBox(x, y);
557 CalcBoundingBox(x2, y2);
558
559 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
560 {
561 // restore the colours we changed
562 ::SetBkMode(GetHdc(), TRANSPARENT);
563 ::SetTextColor(GetHdc(), colFgOld);
564 ::SetBkColor(GetHdc(), colBgOld);
565 }
566 }
567
568 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
569 {
570 // Now, a negative radius value is interpreted to mean
571 // 'the proportion of the smallest X or Y dimension'
572
573 if (radius < 0.0)
574 {
575 double smallest = 0.0;
576 if (width < height)
577 smallest = width;
578 else
579 smallest = height;
580 radius = (- radius * smallest);
581 }
582
583 wxCoord x2 = (x+width);
584 wxCoord y2 = (y+height);
585
586 // Windows draws the filled rectangles without outline (i.e. drawn with a
587 // transparent pen) one pixel smaller in both directions and we want them
588 // to have the same size regardless of which pen is used - adjust
589 if ( m_pen.GetStyle() == wxTRANSPARENT )
590 {
591 x2++;
592 y2++;
593 }
594
595 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
596 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
597
598 CalcBoundingBox(x, y);
599 CalcBoundingBox(x2, y2);
600 }
601
602 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
603 {
604 wxCoord x2 = (x+width);
605 wxCoord y2 = (y+height);
606
607 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
608
609 CalcBoundingBox(x, y);
610 CalcBoundingBox(x2, y2);
611 }
612
613 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
614 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
615 {
616 wxCoord x2 = (x+w);
617 wxCoord y2 = (y+h);
618
619 int rx1 = XLOG2DEV(x+w/2);
620 int ry1 = YLOG2DEV(y+h/2);
621 int rx2 = rx1;
622 int ry2 = ry1;
623
624 sa = DegToRad(sa);
625 ea = DegToRad(ea);
626
627 rx1 += (int)(100.0 * abs(w) * cos(sa));
628 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
629 rx2 += (int)(100.0 * abs(w) * cos(ea));
630 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
631
632 // draw pie with NULL_PEN first and then outline otherwise a line is
633 // drawn from the start and end points to the centre
634 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
635 if (m_signY > 0)
636 {
637 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
638 rx1, ry1, rx2, ry2);
639 }
640 else
641 {
642 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
643 rx1, ry1-1, rx2, ry2-1);
644 }
645 ::SelectObject(GetHdc(), orig_pen);
646 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
647 rx1, ry1, rx2, ry2);
648
649 CalcBoundingBox(x, y);
650 CalcBoundingBox(x2, y2);
651 }
652
653 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
654 {
655 wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
656
657 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon));
658
659 CalcBoundingBox(x, y);
660 CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
661 }
662
663 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
664 {
665 wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
666
667 int width = bmp.GetWidth(),
668 height = bmp.GetHeight();
669
670 HBITMAP hbmpMask = 0;
671
672 if ( useMask )
673 {
674 wxMask *mask = bmp.GetMask();
675 if ( mask )
676 hbmpMask = (HBITMAP)mask->GetMaskBitmap();
677
678 if ( !hbmpMask )
679 {
680 // don't give assert here because this would break existing
681 // programs - just silently ignore useMask parameter
682 useMask = FALSE;
683 }
684 }
685
686 if ( useMask )
687 {
688 #ifdef __WIN32__
689 HDC hdcMem = ::CreateCompatibleDC(GetHdc());
690 ::SelectObject(hdcMem, GetHbitmapOf(bmp));
691
692 // use MaskBlt() with ROP which doesn't do anything to dst in the mask
693 // points
694 bool ok = ::MaskBlt(GetHdc(), x, y, width, height,
695 hdcMem, 0, 0,
696 hbmpMask, 0, 0,
697 MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
698 ::DeleteDC(hdcMem);
699
700 if ( !ok )
701 #endif // Win32
702 {
703 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API
704 // level
705 wxMemoryDC memDC;
706 memDC.SelectObject(bmp);
707
708 Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
709
710 memDC.SelectObject(wxNullBitmap);
711 }
712 }
713 else // no mask, just use BitBlt()
714 {
715 HDC cdc = GetHdc();
716 HDC memdc = ::CreateCompatibleDC( cdc );
717 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
718
719 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
720
721 COLORREF old_textground = ::GetTextColor(GetHdc());
722 COLORREF old_background = ::GetBkColor(GetHdc());
723 if (m_textForegroundColour.Ok())
724 {
725 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
726 }
727 if (m_textBackgroundColour.Ok())
728 {
729 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
730 }
731
732 ::SelectObject( memdc, hbitmap );
733 ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
734 ::DeleteDC( memdc );
735
736 ::SetTextColor(GetHdc(), old_textground);
737 ::SetBkColor(GetHdc(), old_background);
738 }
739 }
740
741 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
742 {
743 DrawAnyText(text, x, y);
744
745 // update the bounding box
746 CalcBoundingBox(x, y);
747
748 wxCoord w, h;
749 GetTextExtent(text, &w, &h);
750 CalcBoundingBox(x + w, y + h);
751 }
752
753 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
754 {
755 // prepare for drawing the text
756 if ( m_textForegroundColour.Ok() )
757 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
758
759 DWORD old_background = 0;
760 if ( m_textBackgroundColour.Ok() )
761 {
762 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
763 }
764
765 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
766 : OPAQUE);
767
768 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
769 text.c_str(), text.length()) == 0 )
770 {
771 wxLogLastError("TextOut");
772 }
773
774 // restore the old parameters (text foreground colour may be left because
775 // it never is set to anything else, but background should remain
776 // transparent even if we just drew an opaque string)
777 if ( m_textBackgroundColour.Ok() )
778 (void)SetBkColor(GetHdc(), old_background);
779
780 SetBkMode(GetHdc(), TRANSPARENT);
781 }
782
783 void wxDC::DoDrawRotatedText(const wxString& text,
784 wxCoord x, wxCoord y,
785 double angle)
786 {
787 // we test that we have some font because otherwise we should still use the
788 // "else" part below to avoid that DrawRotatedText(angle = 180) and
789 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
790 // font for drawing rotated fonts unfortunately)
791 if ( (angle == 0.0) && m_font.Ok() )
792 {
793 DoDrawText(text, x, y);
794 }
795 else
796 {
797 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
798 // can't have non zero orientation/escapement
799 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
800 HFONT hfont = (HFONT)font.GetResourceHandle();
801 LOGFONT lf;
802 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
803 {
804 wxLogLastError("GetObject(hfont)");
805 }
806
807 // GDI wants the angle in tenth of degree
808 long angle10 = (long)(angle * 10);
809 lf.lfEscapement = angle10;
810 lf. lfOrientation = angle10;
811
812 hfont = ::CreateFontIndirect(&lf);
813 if ( !hfont )
814 {
815 wxLogLastError("CreateFont");
816 }
817 else
818 {
819 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
820
821 DrawAnyText(text, x, y);
822
823 (void)::SelectObject(GetHdc(), hfontOld);
824 (void)::DeleteObject(hfont);
825 }
826
827 // call the bounding box by adding all four vertices of the rectangle
828 // containing the text to it (simpler and probably not slower than
829 // determining which of them is really topmost/leftmost/...)
830 wxCoord w, h;
831 GetTextExtent(text, &w, &h);
832
833 double rad = DegToRad(angle);
834
835 // "upper left" and "upper right"
836 CalcBoundingBox(x, y);
837 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
838
839 // "bottom left" and "bottom right"
840 x += (wxCoord)(h*sin(rad));
841 y += (wxCoord)(h*cos(rad));
842 CalcBoundingBox(x, y);
843 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
844 }
845 }
846
847 // ---------------------------------------------------------------------------
848 // set GDI objects
849 // ---------------------------------------------------------------------------
850
851 void wxDC::SetPalette(const wxPalette& palette)
852 {
853 // Set the old object temporarily, in case the assignment deletes an object
854 // that's not yet selected out.
855 if (m_oldPalette)
856 {
857 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
858 m_oldPalette = 0;
859 }
860
861 m_palette = palette;
862
863 if (!m_palette.Ok())
864 {
865 // Setting a NULL colourmap is a way of restoring
866 // the original colourmap
867 if (m_oldPalette)
868 {
869 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
870 m_oldPalette = 0;
871 }
872
873 return;
874 }
875
876 if (m_palette.Ok() && m_palette.GetHPALETTE())
877 {
878 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
879 if (!m_oldPalette)
880 m_oldPalette = (WXHPALETTE) oldPal;
881
882 ::RealizePalette(GetHdc());
883 }
884 }
885
886 void wxDC::SetFont(const wxFont& the_font)
887 {
888 // Set the old object temporarily, in case the assignment deletes an object
889 // that's not yet selected out.
890 if (m_oldFont)
891 {
892 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
893 m_oldFont = 0;
894 }
895
896 m_font = the_font;
897
898 if (!the_font.Ok())
899 {
900 if (m_oldFont)
901 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
902 m_oldFont = 0;
903 }
904
905 if (m_font.Ok() && m_font.GetResourceHandle())
906 {
907 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
908 if (f == (HFONT) NULL)
909 {
910 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
911 }
912 if (!m_oldFont)
913 m_oldFont = (WXHFONT) f;
914 }
915 }
916
917 void wxDC::SetPen(const wxPen& pen)
918 {
919 // Set the old object temporarily, in case the assignment deletes an object
920 // that's not yet selected out.
921 if (m_oldPen)
922 {
923 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
924 m_oldPen = 0;
925 }
926
927 m_pen = pen;
928
929 if (!m_pen.Ok())
930 {
931 if (m_oldPen)
932 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
933 m_oldPen = 0;
934 }
935
936 if (m_pen.Ok())
937 {
938 if (m_pen.GetResourceHandle())
939 {
940 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
941 if (!m_oldPen)
942 m_oldPen = (WXHPEN) p;
943 }
944 }
945 }
946
947 void wxDC::SetBrush(const wxBrush& brush)
948 {
949 // Set the old object temporarily, in case the assignment deletes an object
950 // that's not yet selected out.
951 if (m_oldBrush)
952 {
953 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
954 m_oldBrush = 0;
955 }
956
957 m_brush = brush;
958
959 if (!m_brush.Ok())
960 {
961 if (m_oldBrush)
962 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
963 m_oldBrush = 0;
964 }
965
966 if (m_brush.Ok())
967 {
968 if (m_brush.GetResourceHandle())
969 {
970 HBRUSH b = 0;
971 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
972 if (!m_oldBrush)
973 m_oldBrush = (WXHBRUSH) b;
974 }
975 }
976 }
977
978 void wxDC::SetBackground(const wxBrush& brush)
979 {
980 m_backgroundBrush = brush;
981
982 if (!m_backgroundBrush.Ok())
983 return;
984
985 if (m_canvas)
986 {
987 bool customColours = TRUE;
988 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
989 // change background colours from the control-panel specified colours.
990 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
991 customColours = FALSE;
992
993 if (customColours)
994 {
995 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
996 {
997 m_canvas->SetTransparent(TRUE);
998 }
999 else
1000 {
1001 // New behaviour, 10/2/99: setting the background brush of a DC
1002 // doesn't affect the window background colour. However,
1003 // I'm leaving in the transparency setting because it's needed by
1004 // various controls (e.g. wxStaticText) to determine whether to draw
1005 // transparently or not. TODO: maybe this should be a new function
1006 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
1007 // parent?
1008 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
1009 m_canvas->SetTransparent(FALSE);
1010 }
1011 }
1012 }
1013 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
1014 {
1015 (void)SetBkColor(GetHdc(), new_color);
1016 }
1017 }
1018
1019 void wxDC::SetBackgroundMode(int mode)
1020 {
1021 m_backgroundMode = mode;
1022
1023 // SetBackgroundColour now only refers to text background
1024 // and m_backgroundMode is used there
1025
1026 /*
1027 if (m_backgroundMode == wxTRANSPARENT)
1028 ::SetBkMode(GetHdc(), TRANSPARENT);
1029 else
1030 ::SetBkMode(GetHdc(), OPAQUE);
1031 */
1032 }
1033
1034 void wxDC::SetLogicalFunction(int function)
1035 {
1036 m_logicalFunction = function;
1037
1038 SetRop(m_hDC);
1039 }
1040
1041 void wxDC::SetRop(WXHDC dc)
1042 {
1043 if ( !dc || m_logicalFunction < 0 )
1044 return;
1045
1046 int rop;
1047
1048 switch (m_logicalFunction)
1049 {
1050 case wxCLEAR: rop = R2_BLACK; break;
1051 case wxXOR: rop = R2_XORPEN; break;
1052 case wxINVERT: rop = R2_NOT; break;
1053 case wxOR_REVERSE: rop = R2_MERGEPENNOT; break;
1054 case wxAND_REVERSE: rop = R2_MASKPENNOT; break;
1055 case wxCOPY: rop = R2_COPYPEN; break;
1056 case wxAND: rop = R2_MASKPEN; break;
1057 case wxAND_INVERT: rop = R2_MASKNOTPEN; break;
1058 case wxNO_OP: rop = R2_NOP; break;
1059 case wxNOR: rop = R2_NOTMERGEPEN; break;
1060 case wxEQUIV: rop = R2_NOTXORPEN; break;
1061 case wxSRC_INVERT: rop = R2_NOTCOPYPEN; break;
1062 case wxOR_INVERT: rop = R2_MERGENOTPEN; break;
1063 case wxNAND: rop = R2_NOTMASKPEN; break;
1064 case wxOR: rop = R2_MERGEPEN; break;
1065 case wxSET: rop = R2_WHITE; break;
1066
1067 default:
1068 wxFAIL_MSG( wxT("unsupported logical function") );
1069 return;
1070 }
1071
1072 SetROP2(GetHdc(), rop);
1073 }
1074
1075 bool wxDC::StartDoc(const wxString& message)
1076 {
1077 // We might be previewing, so return TRUE to let it continue.
1078 return TRUE;
1079 }
1080
1081 void wxDC::EndDoc()
1082 {
1083 }
1084
1085 void wxDC::StartPage()
1086 {
1087 }
1088
1089 void wxDC::EndPage()
1090 {
1091 }
1092
1093 // ---------------------------------------------------------------------------
1094 // text metrics
1095 // ---------------------------------------------------------------------------
1096
1097 wxCoord wxDC::GetCharHeight() const
1098 {
1099 TEXTMETRIC lpTextMetric;
1100
1101 GetTextMetrics(GetHdc(), &lpTextMetric);
1102
1103 return YDEV2LOGREL(lpTextMetric.tmHeight);
1104 }
1105
1106 wxCoord wxDC::GetCharWidth() const
1107 {
1108 TEXTMETRIC lpTextMetric;
1109
1110 GetTextMetrics(GetHdc(), &lpTextMetric);
1111
1112 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1113 }
1114
1115 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1116 wxCoord *descent, wxCoord *externalLeading,
1117 wxFont *theFont) const
1118 {
1119 wxFont *fontToUse = (wxFont*) theFont;
1120 if (!fontToUse)
1121 fontToUse = (wxFont*) &m_font;
1122
1123 SIZE sizeRect;
1124 TEXTMETRIC tm;
1125
1126 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1127 GetTextMetrics(GetHdc(), &tm);
1128
1129 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1130 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1131 if (descent) *descent = tm.tmDescent;
1132 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1133 }
1134
1135 void wxDC::SetMapMode(int mode)
1136 {
1137 m_mappingMode = mode;
1138
1139 int pixel_width = 0;
1140 int pixel_height = 0;
1141 int mm_width = 0;
1142 int mm_height = 0;
1143
1144 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1145 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1146 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1147 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1148
1149 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1150 {
1151 return;
1152 }
1153
1154 double mm2pixelsX = pixel_width/mm_width;
1155 double mm2pixelsY = pixel_height/mm_height;
1156
1157 switch (mode)
1158 {
1159 case wxMM_TWIPS:
1160 {
1161 m_logicalScaleX = (twips2mm * mm2pixelsX);
1162 m_logicalScaleY = (twips2mm * mm2pixelsY);
1163 break;
1164 }
1165 case wxMM_POINTS:
1166 {
1167 m_logicalScaleX = (pt2mm * mm2pixelsX);
1168 m_logicalScaleY = (pt2mm * mm2pixelsY);
1169 break;
1170 }
1171 case wxMM_METRIC:
1172 {
1173 m_logicalScaleX = mm2pixelsX;
1174 m_logicalScaleY = mm2pixelsY;
1175 break;
1176 }
1177 case wxMM_LOMETRIC:
1178 {
1179 m_logicalScaleX = (mm2pixelsX/10.0);
1180 m_logicalScaleY = (mm2pixelsY/10.0);
1181 break;
1182 }
1183 default:
1184 case wxMM_TEXT:
1185 {
1186 m_logicalScaleX = 1.0;
1187 m_logicalScaleY = 1.0;
1188 break;
1189 }
1190 }
1191
1192 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1193 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1194
1195 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1196 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1197 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1198 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1199 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1200 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1201 }
1202
1203 void wxDC::SetUserScale(double x, double y)
1204 {
1205 m_userScaleX = x;
1206 m_userScaleY = y;
1207
1208 SetMapMode(m_mappingMode);
1209 }
1210
1211 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1212 {
1213 m_signX = xLeftRight ? 1 : -1;
1214 m_signY = yBottomUp ? -1 : 1;
1215
1216 SetMapMode(m_mappingMode);
1217 }
1218
1219 void wxDC::SetSystemScale(double x, double y)
1220 {
1221 m_scaleX = x;
1222 m_scaleY = y;
1223
1224 SetMapMode(m_mappingMode);
1225 }
1226
1227 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1228 {
1229 m_logicalOriginX = x;
1230 m_logicalOriginY = y;
1231
1232 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1233 }
1234
1235 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1236 {
1237 m_deviceOriginX = x;
1238 m_deviceOriginY = y;
1239
1240 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1241 }
1242
1243 // ---------------------------------------------------------------------------
1244 // coordinates transformations
1245 // ---------------------------------------------------------------------------
1246
1247 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1248 {
1249 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1250 }
1251
1252 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1253 {
1254 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1255 }
1256
1257 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1258 {
1259 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1260 }
1261
1262 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1263 {
1264 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1265 }
1266
1267 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1268 {
1269 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1270 }
1271
1272 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1273 {
1274 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1275 }
1276
1277 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1278 {
1279 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1280 }
1281
1282 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1283 {
1284 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1285 }
1286
1287 // ---------------------------------------------------------------------------
1288 // bit blit
1289 // ---------------------------------------------------------------------------
1290
1291 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1292 wxCoord width, wxCoord height,
1293 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1294 int rop, bool useMask)
1295 {
1296 wxMask *mask = NULL;
1297 if ( useMask )
1298 {
1299 const wxBitmap& bmp = source->m_selectedBitmap;
1300 mask = bmp.GetMask();
1301
1302 if ( !(bmp.Ok() && mask && mask->GetMaskBitmap()) )
1303 {
1304 // don't give assert here because this would break existing
1305 // programs - just silently ignore useMask parameter
1306 useMask = FALSE;
1307 }
1308 }
1309
1310 COLORREF old_textground = ::GetTextColor(GetHdc());
1311 COLORREF old_background = ::GetBkColor(GetHdc());
1312 if (m_textForegroundColour.Ok())
1313 {
1314 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1315 }
1316 if (m_textBackgroundColour.Ok())
1317 {
1318 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1319 }
1320
1321 DWORD dwRop = SRCCOPY;
1322 switch (rop)
1323 {
1324 case wxXOR: dwRop = SRCINVERT; break;
1325 case wxINVERT: dwRop = DSTINVERT; break;
1326 case wxOR_REVERSE: dwRop = 0x00DD0228; break;
1327 case wxAND_REVERSE: dwRop = SRCERASE; break;
1328 case wxCLEAR: dwRop = BLACKNESS; break;
1329 case wxSET: dwRop = WHITENESS; break;
1330 case wxOR_INVERT: dwRop = MERGEPAINT; break;
1331 case wxAND: dwRop = SRCAND; break;
1332 case wxOR: dwRop = SRCPAINT; break;
1333 case wxEQUIV: dwRop = 0x00990066; break;
1334 case wxNAND: dwRop = 0x007700E6; break;
1335 case wxAND_INVERT: dwRop = 0x00220326; break;
1336 case wxCOPY: dwRop = SRCCOPY; break;
1337 case wxNO_OP: dwRop = DSTCOPY; break;
1338 case wxSRC_INVERT: dwRop = NOTSRCCOPY; break;
1339 case wxNOR: dwRop = NOTSRCCOPY; break;
1340 default:
1341 wxFAIL_MSG( wxT("unsupported logical function") );
1342 return FALSE;
1343 }
1344
1345 bool success;
1346
1347 if (useMask)
1348 {
1349 #ifdef __WIN32__
1350 // we want the part of the image corresponding to the mask to be
1351 // transparent, so use "DSTCOPY" ROP for the mask points (the usual
1352 // meaning of fg and bg is inverted which corresponds to wxWin notion
1353 // of the mask which is also contrary to the Windows one)
1354 success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
1355 GetHdcOf(*source), xsrc, ysrc,
1356 (HBITMAP)mask->GetMaskBitmap(), 0, 0,
1357 MAKEROP4(dwRop, DSTCOPY)) != 0;
1358
1359 if ( !success )
1360 #endif // Win32
1361 {
1362 // Blit bitmap with mask
1363
1364 // create a temp buffer bitmap and DCs to access it and the mask
1365 HDC dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
1366 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1367 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1368 ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
1369 ::SelectObject(dc_buffer, buffer_bmap);
1370
1371 // copy dest to buffer
1372 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1373 GetHdc(), xdest, ydest, SRCCOPY) )
1374 {
1375 wxLogLastError("BitBlt");
1376 }
1377
1378 // copy src to buffer using selected raster op
1379 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1380 GetHdcOf(*source), xsrc, ysrc, dwRop) )
1381 {
1382 wxLogLastError("BitBlt");
1383 }
1384
1385 // set masked area in buffer to BLACK (pixel value 0)
1386 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1387 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1388 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1389 dc_mask, xsrc, ysrc, SRCAND) )
1390 {
1391 wxLogLastError("BitBlt");
1392 }
1393
1394 // set unmasked area in dest to BLACK
1395 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1396 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1397 if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height,
1398 dc_mask, xsrc, ysrc, SRCAND) )
1399 {
1400 wxLogLastError("BitBlt");
1401 }
1402 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1403 ::SetTextColor(GetHdc(), prevCol);
1404
1405 // OR buffer to dest
1406 success = ::BitBlt(GetHdc(), xdest, ydest,
1407 (int)width, (int)height,
1408 dc_buffer, 0, 0, SRCPAINT) != 0;
1409 if ( !success )
1410 {
1411 wxLogLastError("BitBlt");
1412 }
1413
1414 // tidy up temporary DCs and bitmap
1415 ::SelectObject(dc_mask, 0);
1416 ::DeleteDC(dc_mask);
1417 ::SelectObject(dc_buffer, 0);
1418 ::DeleteDC(dc_buffer);
1419 ::DeleteObject(buffer_bmap);
1420 }
1421 }
1422 else // no mask, just BitBlt() it
1423 {
1424 success = ::BitBlt(GetHdc(), xdest, ydest,
1425 (int)width, (int)height,
1426 GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
1427 if ( !success )
1428 {
1429 wxLogLastError("BitBlt");
1430 }
1431 }
1432 ::SetTextColor(GetHdc(), old_textground);
1433 ::SetBkColor(GetHdc(), old_background);
1434
1435 return success;
1436 }
1437
1438 void wxDC::DoGetSize(int *w, int *h) const
1439 {
1440 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1441 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1442 }
1443
1444 void wxDC::DoGetSizeMM(int *w, int *h) const
1445 {
1446 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1447 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1448 }
1449
1450 wxSize wxDC::GetPPI() const
1451 {
1452 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1453 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1454
1455 return wxSize(x, y);
1456 }
1457
1458 // For use by wxWindows only, unless custom units are required.
1459 void wxDC::SetLogicalScale(double x, double y)
1460 {
1461 m_logicalScaleX = x;
1462 m_logicalScaleY = y;
1463 }
1464
1465 #if WXWIN_COMPATIBILITY
1466 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1467 float *descent, float *externalLeading,
1468 wxFont *theFont, bool use16bit) const
1469 {
1470 wxCoord x1, y1, descent1, externalLeading1;
1471 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1472 *x = x1; *y = y1;
1473 if (descent)
1474 *descent = descent1;
1475 if (externalLeading)
1476 *externalLeading = externalLeading1;
1477 }
1478 #endif
1479
1480 // ---------------------------------------------------------------------------
1481 // spline drawing code
1482 // ---------------------------------------------------------------------------
1483
1484 #if wxUSE_SPLINES
1485
1486 class wxSpline: public wxObject
1487 {
1488 public:
1489 int type;
1490 wxList *points;
1491
1492 wxSpline(wxList *list);
1493 void DeletePoints();
1494
1495 // Doesn't delete points
1496 ~wxSpline();
1497 };
1498
1499 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1500
1501 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1502 double a3, double b3, double a4, double b4);
1503 void wx_clear_stack();
1504 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1505 double *y3, double *x4, double *y4);
1506 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1507 double x4, double y4);
1508 static bool wx_spline_add_point(double x, double y);
1509 static void wx_spline_draw_point_array(wxDC *dc);
1510 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1511
1512 void wxDC::DoDrawSpline(wxList *list)
1513 {
1514 wxSpline spline(list);
1515
1516 wx_draw_open_spline(this, &spline);
1517 }
1518
1519 wxList wx_spline_point_list;
1520
1521 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1522 {
1523 wxPoint *p;
1524 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1525 double x1, y1, x2, y2;
1526
1527 wxNode *node = spline->points->First();
1528 p = (wxPoint *)node->Data();
1529
1530 x1 = p->x;
1531 y1 = p->y;
1532
1533 node = node->Next();
1534 p = (wxPoint *)node->Data();
1535
1536 x2 = p->x;
1537 y2 = p->y;
1538 cx1 = (double)((x1 + x2) / 2);
1539 cy1 = (double)((y1 + y2) / 2);
1540 cx2 = (double)((cx1 + x2) / 2);
1541 cy2 = (double)((cy1 + y2) / 2);
1542
1543 wx_spline_add_point(x1, y1);
1544
1545 while ((node = node->Next()) != NULL)
1546 {
1547 p = (wxPoint *)node->Data();
1548 x1 = x2;
1549 y1 = y2;
1550 x2 = p->x;
1551 y2 = p->y;
1552 cx4 = (double)(x1 + x2) / 2;
1553 cy4 = (double)(y1 + y2) / 2;
1554 cx3 = (double)(x1 + cx4) / 2;
1555 cy3 = (double)(y1 + cy4) / 2;
1556
1557 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1558
1559 cx1 = cx4;
1560 cy1 = cy4;
1561 cx2 = (double)(cx1 + x2) / 2;
1562 cy2 = (double)(cy1 + y2) / 2;
1563 }
1564
1565 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1566 wx_spline_add_point(x2, y2);
1567
1568 wx_spline_draw_point_array(dc);
1569
1570 }
1571
1572 /********************* CURVES FOR SPLINES *****************************
1573
1574 The following spline drawing routine is from
1575
1576 "An Algorithm for High-Speed Curve Generation"
1577 by George Merrill Chaikin,
1578 Computer Graphics and Image Processing, 3, Academic Press,
1579 1974, 346-349.
1580
1581 and
1582
1583 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1584 Computer Graphics and Image Processing, 4, Academic Press,
1585 1975, 304-310.
1586
1587 ***********************************************************************/
1588
1589 #define half(z1, z2) ((z1+z2)/2.0)
1590 #define THRESHOLD 5
1591
1592 /* iterative version */
1593
1594 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1595 double b4)
1596 {
1597 register double xmid, ymid;
1598 double x1, y1, x2, y2, x3, y3, x4, y4;
1599
1600 wx_clear_stack();
1601 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1602
1603 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1604 xmid = (double)half(x2, x3);
1605 ymid = (double)half(y2, y3);
1606 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1607 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1608 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1609 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1610 } else {
1611 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1612 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1613 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1614 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1615 }
1616 }
1617 }
1618
1619
1620 /* utilities used by spline drawing routines */
1621
1622
1623 typedef struct wx_spline_stack_struct {
1624 double x1, y1, x2, y2, x3, y3, x4, y4;
1625 }
1626 Stack;
1627
1628 #define SPLINE_STACK_DEPTH 20
1629 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1630 static Stack *wx_stack_top;
1631 static int wx_stack_count;
1632
1633 void wx_clear_stack()
1634 {
1635 wx_stack_top = wx_spline_stack;
1636 wx_stack_count = 0;
1637 }
1638
1639 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1640 {
1641 wx_stack_top->x1 = x1;
1642 wx_stack_top->y1 = y1;
1643 wx_stack_top->x2 = x2;
1644 wx_stack_top->y2 = y2;
1645 wx_stack_top->x3 = x3;
1646 wx_stack_top->y3 = y3;
1647 wx_stack_top->x4 = x4;
1648 wx_stack_top->y4 = y4;
1649 wx_stack_top++;
1650 wx_stack_count++;
1651 }
1652
1653 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1654 double *x3, double *y3, double *x4, double *y4)
1655 {
1656 if (wx_stack_count == 0)
1657 return (0);
1658 wx_stack_top--;
1659 wx_stack_count--;
1660 *x1 = wx_stack_top->x1;
1661 *y1 = wx_stack_top->y1;
1662 *x2 = wx_stack_top->x2;
1663 *y2 = wx_stack_top->y2;
1664 *x3 = wx_stack_top->x3;
1665 *y3 = wx_stack_top->y3;
1666 *x4 = wx_stack_top->x4;
1667 *y4 = wx_stack_top->y4;
1668 return (1);
1669 }
1670
1671 static bool wx_spline_add_point(double x, double y)
1672 {
1673 wxPoint *point = new wxPoint;
1674 point->x = (int) x;
1675 point->y = (int) y;
1676 wx_spline_point_list.Append((wxObject*)point);
1677 return TRUE;
1678 }
1679
1680 static void wx_spline_draw_point_array(wxDC *dc)
1681 {
1682 dc->DrawLines(&wx_spline_point_list, 0, 0);
1683 wxNode *node = wx_spline_point_list.First();
1684 while (node)
1685 {
1686 wxPoint *point = (wxPoint *)node->Data();
1687 delete point;
1688 delete node;
1689 node = wx_spline_point_list.First();
1690 }
1691 }
1692
1693 wxSpline::wxSpline(wxList *list)
1694 {
1695 points = list;
1696 }
1697
1698 wxSpline::~wxSpline()
1699 {
1700 }
1701
1702 void wxSpline::DeletePoints()
1703 {
1704 for(wxNode *node = points->First(); node; node = points->First())
1705 {
1706 wxPoint *point = (wxPoint *)node->Data();
1707 delete point;
1708 delete node;
1709 }
1710 delete points;
1711 }
1712
1713
1714 #endif // wxUSE_SPLINES
1715
wxWidgets (Impactor)