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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 // Normalization: Windows doesn't draw the last point of the line
364 (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
365
366 CalcBoundingBox(x1, y1);
367 CalcBoundingBox(x2, y2);
368 }
369
370 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
371 {
372 double dx = xc-x1;
373 double dy = yc-y1;
374 double radius = (double)sqrt(dx*dx+dy*dy) ;;
375 if (x1==x2 && x2==y2)
376 {
377 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
378 return;
379 }
380
381 wxCoord xx1 = XLOG2DEV(x1);
382 wxCoord yy1 = YLOG2DEV(y1);
383 wxCoord xx2 = XLOG2DEV(x2);
384 wxCoord yy2 = YLOG2DEV(y2);
385 wxCoord xxc = XLOG2DEV(xc);
386 wxCoord yyc = YLOG2DEV(yc);
387 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
388
389 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
390 wxCoord xxx1 = (wxCoord) (xxc-ray);
391 wxCoord yyy1 = (wxCoord) (yyc-ray);
392 wxCoord xxx2 = (wxCoord) (xxc+ray);
393 wxCoord yyy2 = (wxCoord) (yyc+ray);
394 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
395 {
396 // Have to add 1 to bottom-right corner of rectangle
397 // to make semi-circles look right (crooked line otherwise).
398 // Unfortunately this is not a reliable method, depends
399 // on the size of shape.
400 // TODO: figure out why this happens!
401 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
402 xx1,yy1,xx2,yy2);
403 }
404 else
405 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
406 xx1,yy1,xx2,yy2);
407
408 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
409 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
410 }
411
412 void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
413 wxCoord width, wxCoord height)
414 {
415 wxCoord x2 = x1 + width,
416 y2 = y1 + height;
417
418 #if defined(__WIN32__) && !defined(__SC__)
419 RECT rect;
420 rect.left = x1;
421 rect.top = y1;
422 rect.right = x2;
423 rect.bottom = y2;
424
425 DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
426 #else // Win16
427 // In WIN16, draw a cross
428 HPEN blackPen = ::CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
429 HPEN whiteBrush = (HPEN)::GetStockObject(WHITE_BRUSH);
430 HPEN hPenOld = (HPEN)::SelectObject(hdcMem, blackPen);
431 HPEN hBrushOld = (HPEN)::SelectObject(hdcMem, whiteBrush);
432 ::SetROP2(GetHdc(), R2_COPYPEN);
433 Rectangle(GetHdc(), x1, y1, x2, y2);
434 MoveTo(GetHdc(), x1, y1);
435 LineTo(GetHdc(), x2, y2);
436 MoveTo(GetHdc(), x2, y1);
437 LineTo(GetHdc(), x1, y2);
438 ::SelectObject(GetHdc(), hPenOld);
439 ::SelectObject(GetHdc(), hBrushOld);
440 ::DeleteObject(blackPen);
441 #endif // Win32/16
442
443 CalcBoundingBox(x1, y1);
444 CalcBoundingBox(x2, y2);
445 }
446
447 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
448 {
449 COLORREF color = 0x00ffffff;
450 if (m_pen.Ok())
451 {
452 color = m_pen.GetColour().GetPixel();
453 }
454
455 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
456
457 CalcBoundingBox(x, y);
458 }
459
460 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
461 {
462 COLORREF old_textground = ::GetTextColor(GetHdc());
463 COLORREF old_background = ::GetBkColor(GetHdc());
464 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
465 {
466
467 if (m_textForegroundColour.Ok())
468 { //just the oposite from what is expected see help on pattern brush
469 // 1 in mask becomes bk color
470 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel() );
471 }
472 if (m_textBackgroundColour.Ok())
473 { //just the oposite from what is expected
474 // 0 in mask becomes text color
475 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel() );
476 }
477
478 if (m_backgroundMode == wxTRANSPARENT)
479 SetBkMode(GetHdc(), TRANSPARENT);
480 else
481 SetBkMode(GetHdc(), OPAQUE);
482 }
483
484 // Do things less efficiently if we have offsets
485 if (xoffset != 0 || yoffset != 0)
486 {
487 POINT *cpoints = new POINT[n];
488 int i;
489 for (i = 0; i < n; i++)
490 {
491 cpoints[i].x = (int)(points[i].x + xoffset);
492 cpoints[i].y = (int)(points[i].y + yoffset);
493
494 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
495 }
496 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
497 (void)Polygon(GetHdc(), cpoints, n);
498 SetPolyFillMode(GetHdc(),prev);
499 delete[] cpoints;
500 }
501 else
502 {
503 int i;
504 for (i = 0; i < n; i++)
505 CalcBoundingBox(points[i].x, points[i].y);
506
507 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
508 (void)Polygon(GetHdc(), (POINT*) points, n);
509 SetPolyFillMode(GetHdc(),prev);
510 }
511
512 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
513 {
514 ::SetBkMode(GetHdc(), TRANSPARENT);
515 ::SetTextColor(GetHdc(), old_textground);
516 ::SetBkColor(GetHdc(), old_background);
517 }
518 }
519
520 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
521 {
522 // Do things less efficiently if we have offsets
523 if (xoffset != 0 || yoffset != 0)
524 {
525 POINT *cpoints = new POINT[n];
526 int i;
527 for (i = 0; i < n; i++)
528 {
529 cpoints[i].x = (int)(points[i].x + xoffset);
530 cpoints[i].y = (int)(points[i].y + yoffset);
531
532 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
533 }
534 (void)Polyline(GetHdc(), cpoints, n);
535 delete[] cpoints;
536 }
537 else
538 {
539 int i;
540 for (i = 0; i < n; i++)
541 CalcBoundingBox(points[i].x, points[i].y);
542
543 (void)Polyline(GetHdc(), (POINT*) points, n);
544 }
545 }
546
547 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
548 {
549 COLORREF colFgOld = 0,
550 colBgOld = 0;
551
552 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
553 {
554 colFgOld = ::GetTextColor(GetHdc());
555 colBgOld = ::GetBkColor(GetHdc());
556
557 if ( m_textForegroundColour.Ok() )
558 {
559 // just the oposite from what is expected see help on pattern brush
560 // 1 in mask becomes bk color
561 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel());
562 }
563
564 if ( m_textBackgroundColour.Ok() )
565 {
566 // 0 in mask becomes text color
567 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel());
568 }
569
570 // VZ: IMHO this does strictly nothing here
571 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
572 : OPAQUE);
573 }
574
575 wxCoord x2 = x + width;
576 wxCoord y2 = y + height;
577
578 // Windows draws the filled rectangles without outline (i.e. drawn with a
579 // transparent pen) one pixel smaller in both directions and we want them
580 // to have the same size regardless of which pen is used - adjust
581 if ( m_pen.GetStyle() == wxTRANSPARENT )
582 {
583 x2++;
584 y2++;
585 }
586
587 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
588
589 CalcBoundingBox(x, y);
590 CalcBoundingBox(x2, y2);
591
592 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
593 {
594 // restore the colours we changed
595 ::SetBkMode(GetHdc(), TRANSPARENT);
596 ::SetTextColor(GetHdc(), colFgOld);
597 ::SetBkColor(GetHdc(), colBgOld);
598 }
599 }
600
601 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
602 {
603 // Now, a negative radius value is interpreted to mean
604 // 'the proportion of the smallest X or Y dimension'
605
606 if (radius < 0.0)
607 {
608 double smallest = 0.0;
609 if (width < height)
610 smallest = width;
611 else
612 smallest = height;
613 radius = (- radius * smallest);
614 }
615
616 wxCoord x2 = (x+width);
617 wxCoord y2 = (y+height);
618
619 // Windows draws the filled rectangles without outline (i.e. drawn with a
620 // transparent pen) one pixel smaller in both directions and we want them
621 // to have the same size regardless of which pen is used - adjust
622 if ( m_pen.GetStyle() == wxTRANSPARENT )
623 {
624 x2++;
625 y2++;
626 }
627
628 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
629 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
630
631 CalcBoundingBox(x, y);
632 CalcBoundingBox(x2, y2);
633 }
634
635 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
636 {
637 wxCoord x2 = (x+width);
638 wxCoord y2 = (y+height);
639
640 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
641
642 CalcBoundingBox(x, y);
643 CalcBoundingBox(x2, y2);
644 }
645
646 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
647 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
648 {
649 wxCoord x2 = (x+w);
650 wxCoord y2 = (y+h);
651
652 int rx1 = XLOG2DEV(x+w/2);
653 int ry1 = YLOG2DEV(y+h/2);
654 int rx2 = rx1;
655 int ry2 = ry1;
656
657 sa = DegToRad(sa);
658 ea = DegToRad(ea);
659
660 rx1 += (int)(100.0 * abs(w) * cos(sa));
661 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
662 rx2 += (int)(100.0 * abs(w) * cos(ea));
663 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
664
665 // draw pie with NULL_PEN first and then outline otherwise a line is
666 // drawn from the start and end points to the centre
667 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
668 if (m_signY > 0)
669 {
670 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
671 rx1, ry1, rx2, ry2);
672 }
673 else
674 {
675 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
676 rx1, ry1-1, rx2, ry2-1);
677 }
678 ::SelectObject(GetHdc(), orig_pen);
679 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
680 rx1, ry1, rx2, ry2);
681
682 CalcBoundingBox(x, y);
683 CalcBoundingBox(x2, y2);
684 }
685
686 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
687 {
688 wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
689
690 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon));
691
692 CalcBoundingBox(x, y);
693 CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
694 }
695
696 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
697 {
698 wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
699
700 int width = bmp.GetWidth(),
701 height = bmp.GetHeight();
702
703 HBITMAP hbmpMask = 0;
704
705 if ( useMask )
706 {
707 wxMask *mask = bmp.GetMask();
708 if ( mask )
709 hbmpMask = (HBITMAP)mask->GetMaskBitmap();
710
711 if ( !hbmpMask )
712 {
713 // don't give assert here because this would break existing
714 // programs - just silently ignore useMask parameter
715 useMask = FALSE;
716 }
717 }
718
719 if ( useMask )
720 {
721 #ifdef __WIN32__
722 HDC hdcMem = ::CreateCompatibleDC(GetHdc());
723 ::SelectObject(hdcMem, GetHbitmapOf(bmp));
724
725 // use MaskBlt() with ROP which doesn't do anything to dst in the mask
726 // points
727 bool ok = ::MaskBlt(GetHdc(), x, y, width, height,
728 hdcMem, 0, 0,
729 hbmpMask, 0, 0,
730 MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
731 ::DeleteDC(hdcMem);
732
733 if ( !ok )
734 #endif // Win32
735 {
736 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API
737 // level
738 wxMemoryDC memDC;
739 memDC.SelectObject(bmp);
740
741 Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
742
743 memDC.SelectObject(wxNullBitmap);
744 }
745 }
746 else // no mask, just use BitBlt()
747 {
748 HDC cdc = GetHdc();
749 HDC memdc = ::CreateCompatibleDC( cdc );
750 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
751
752 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
753
754 COLORREF old_textground = ::GetTextColor(GetHdc());
755 COLORREF old_background = ::GetBkColor(GetHdc());
756 if (m_textForegroundColour.Ok())
757 {
758 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
759 }
760 if (m_textBackgroundColour.Ok())
761 {
762 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
763 }
764
765 ::SelectObject( memdc, hbitmap );
766 ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
767 ::DeleteDC( memdc );
768
769 ::SetTextColor(GetHdc(), old_textground);
770 ::SetBkColor(GetHdc(), old_background);
771 }
772 }
773
774 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
775 {
776 DrawAnyText(text, x, y);
777
778 // update the bounding box
779 CalcBoundingBox(x, y);
780
781 wxCoord w, h;
782 GetTextExtent(text, &w, &h);
783 CalcBoundingBox(x + w, y + h);
784 }
785
786 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
787 {
788 // prepare for drawing the text
789 if ( m_textForegroundColour.Ok() )
790 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
791
792 DWORD old_background = 0;
793 if ( m_textBackgroundColour.Ok() )
794 {
795 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
796 }
797
798 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
799 : OPAQUE);
800
801 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
802 text.c_str(), text.length()) == 0 )
803 {
804 wxLogLastError("TextOut");
805 }
806
807 // restore the old parameters (text foreground colour may be left because
808 // it never is set to anything else, but background should remain
809 // transparent even if we just drew an opaque string)
810 if ( m_textBackgroundColour.Ok() )
811 (void)SetBkColor(GetHdc(), old_background);
812
813 SetBkMode(GetHdc(), TRANSPARENT);
814 }
815
816 void wxDC::DoDrawRotatedText(const wxString& text,
817 wxCoord x, wxCoord y,
818 double angle)
819 {
820 // we test that we have some font because otherwise we should still use the
821 // "else" part below to avoid that DrawRotatedText(angle = 180) and
822 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
823 // font for drawing rotated fonts unfortunately)
824 if ( (angle == 0.0) && m_font.Ok() )
825 {
826 DoDrawText(text, x, y);
827 }
828 else
829 {
830 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
831 // can't have non zero orientation/escapement
832 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
833 HFONT hfont = (HFONT)font.GetResourceHandle();
834 LOGFONT lf;
835 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
836 {
837 wxLogLastError("GetObject(hfont)");
838 }
839
840 // GDI wants the angle in tenth of degree
841 long angle10 = (long)(angle * 10);
842 lf.lfEscapement = angle10;
843 lf. lfOrientation = angle10;
844
845 hfont = ::CreateFontIndirect(&lf);
846 if ( !hfont )
847 {
848 wxLogLastError("CreateFont");
849 }
850 else
851 {
852 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
853
854 DrawAnyText(text, x, y);
855
856 (void)::SelectObject(GetHdc(), hfontOld);
857 (void)::DeleteObject(hfont);
858 }
859
860 // call the bounding box by adding all four vertices of the rectangle
861 // containing the text to it (simpler and probably not slower than
862 // determining which of them is really topmost/leftmost/...)
863 wxCoord w, h;
864 GetTextExtent(text, &w, &h);
865
866 double rad = DegToRad(angle);
867
868 // "upper left" and "upper right"
869 CalcBoundingBox(x, y);
870 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
871
872 // "bottom left" and "bottom right"
873 x += (wxCoord)(h*sin(rad));
874 y += (wxCoord)(h*cos(rad));
875 CalcBoundingBox(x, y);
876 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
877 }
878 }
879
880 // ---------------------------------------------------------------------------
881 // set GDI objects
882 // ---------------------------------------------------------------------------
883
884 void wxDC::SetPalette(const wxPalette& palette)
885 {
886 // Set the old object temporarily, in case the assignment deletes an object
887 // that's not yet selected out.
888 if (m_oldPalette)
889 {
890 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
891 m_oldPalette = 0;
892 }
893
894 m_palette = palette;
895
896 if (!m_palette.Ok())
897 {
898 // Setting a NULL colourmap is a way of restoring
899 // the original colourmap
900 if (m_oldPalette)
901 {
902 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
903 m_oldPalette = 0;
904 }
905
906 return;
907 }
908
909 if (m_palette.Ok() && m_palette.GetHPALETTE())
910 {
911 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
912 if (!m_oldPalette)
913 m_oldPalette = (WXHPALETTE) oldPal;
914
915 ::RealizePalette(GetHdc());
916 }
917 }
918
919 void wxDC::SetFont(const wxFont& the_font)
920 {
921 // Set the old object temporarily, in case the assignment deletes an object
922 // that's not yet selected out.
923 if (m_oldFont)
924 {
925 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
926 m_oldFont = 0;
927 }
928
929 m_font = the_font;
930
931 if (!the_font.Ok())
932 {
933 if (m_oldFont)
934 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
935 m_oldFont = 0;
936 }
937
938 if (m_font.Ok() && m_font.GetResourceHandle())
939 {
940 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
941 if (f == (HFONT) NULL)
942 {
943 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
944 }
945 if (!m_oldFont)
946 m_oldFont = (WXHFONT) f;
947 }
948 }
949
950 void wxDC::SetPen(const wxPen& pen)
951 {
952 // Set the old object temporarily, in case the assignment deletes an object
953 // that's not yet selected out.
954 if (m_oldPen)
955 {
956 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
957 m_oldPen = 0;
958 }
959
960 m_pen = pen;
961
962 if (!m_pen.Ok())
963 {
964 if (m_oldPen)
965 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
966 m_oldPen = 0;
967 }
968
969 if (m_pen.Ok())
970 {
971 if (m_pen.GetResourceHandle())
972 {
973 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
974 if (!m_oldPen)
975 m_oldPen = (WXHPEN) p;
976 }
977 }
978 }
979
980 void wxDC::SetBrush(const wxBrush& brush)
981 {
982 // Set the old object temporarily, in case the assignment deletes an object
983 // that's not yet selected out.
984 if (m_oldBrush)
985 {
986 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
987 m_oldBrush = 0;
988 }
989
990 m_brush = brush;
991
992 if (!m_brush.Ok())
993 {
994 if (m_oldBrush)
995 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
996 m_oldBrush = 0;
997 }
998
999 if (m_brush.Ok())
1000 {
1001 if (m_brush.GetResourceHandle())
1002 {
1003 HBRUSH b = 0;
1004 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
1005 if (!m_oldBrush)
1006 m_oldBrush = (WXHBRUSH) b;
1007 }
1008 }
1009 }
1010
1011 void wxDC::SetBackground(const wxBrush& brush)
1012 {
1013 m_backgroundBrush = brush;
1014
1015 if (!m_backgroundBrush.Ok())
1016 return;
1017
1018 if (m_canvas)
1019 {
1020 bool customColours = TRUE;
1021 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
1022 // change background colours from the control-panel specified colours.
1023 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
1024 customColours = FALSE;
1025
1026 if (customColours)
1027 {
1028 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
1029 {
1030 m_canvas->SetTransparent(TRUE);
1031 }
1032 else
1033 {
1034 // New behaviour, 10/2/99: setting the background brush of a DC
1035 // doesn't affect the window background colour. However,
1036 // I'm leaving in the transparency setting because it's needed by
1037 // various controls (e.g. wxStaticText) to determine whether to draw
1038 // transparently or not. TODO: maybe this should be a new function
1039 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
1040 // parent?
1041 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
1042 m_canvas->SetTransparent(FALSE);
1043 }
1044 }
1045 }
1046 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
1047 {
1048 (void)SetBkColor(GetHdc(), new_color);
1049 }
1050 }
1051
1052 void wxDC::SetBackgroundMode(int mode)
1053 {
1054 m_backgroundMode = mode;
1055
1056 // SetBackgroundColour now only refers to text background
1057 // and m_backgroundMode is used there
1058
1059 /*
1060 if (m_backgroundMode == wxTRANSPARENT)
1061 ::SetBkMode(GetHdc(), TRANSPARENT);
1062 else
1063 ::SetBkMode(GetHdc(), OPAQUE);
1064 */
1065 }
1066
1067 void wxDC::SetLogicalFunction(int function)
1068 {
1069 m_logicalFunction = function;
1070
1071 SetRop(m_hDC);
1072 }
1073
1074 void wxDC::SetRop(WXHDC dc)
1075 {
1076 if ( !dc || m_logicalFunction < 0 )
1077 return;
1078
1079 int rop;
1080
1081 switch (m_logicalFunction)
1082 {
1083 case wxCLEAR: rop = R2_BLACK; break;
1084 case wxXOR: rop = R2_XORPEN; break;
1085 case wxINVERT: rop = R2_NOT; break;
1086 case wxOR_REVERSE: rop = R2_MERGEPENNOT; break;
1087 case wxAND_REVERSE: rop = R2_MASKPENNOT; break;
1088 case wxCOPY: rop = R2_COPYPEN; break;
1089 case wxAND: rop = R2_MASKPEN; break;
1090 case wxAND_INVERT: rop = R2_MASKNOTPEN; break;
1091 case wxNO_OP: rop = R2_NOP; break;
1092 case wxNOR: rop = R2_NOTMERGEPEN; break;
1093 case wxEQUIV: rop = R2_NOTXORPEN; break;
1094 case wxSRC_INVERT: rop = R2_NOTCOPYPEN; break;
1095 case wxOR_INVERT: rop = R2_MERGENOTPEN; break;
1096 case wxNAND: rop = R2_NOTMASKPEN; break;
1097 case wxOR: rop = R2_MERGEPEN; break;
1098 case wxSET: rop = R2_WHITE; break;
1099
1100 default:
1101 wxFAIL_MSG( wxT("unsupported logical function") );
1102 return;
1103 }
1104
1105 SetROP2(GetHdc(), rop);
1106 }
1107
1108 bool wxDC::StartDoc(const wxString& message)
1109 {
1110 // We might be previewing, so return TRUE to let it continue.
1111 return TRUE;
1112 }
1113
1114 void wxDC::EndDoc()
1115 {
1116 }
1117
1118 void wxDC::StartPage()
1119 {
1120 }
1121
1122 void wxDC::EndPage()
1123 {
1124 }
1125
1126 // ---------------------------------------------------------------------------
1127 // text metrics
1128 // ---------------------------------------------------------------------------
1129
1130 wxCoord wxDC::GetCharHeight() const
1131 {
1132 TEXTMETRIC lpTextMetric;
1133
1134 GetTextMetrics(GetHdc(), &lpTextMetric);
1135
1136 return YDEV2LOGREL(lpTextMetric.tmHeight);
1137 }
1138
1139 wxCoord wxDC::GetCharWidth() const
1140 {
1141 TEXTMETRIC lpTextMetric;
1142
1143 GetTextMetrics(GetHdc(), &lpTextMetric);
1144
1145 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1146 }
1147
1148 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1149 wxCoord *descent, wxCoord *externalLeading,
1150 wxFont *theFont) const
1151 {
1152 wxFont *fontToUse = (wxFont*) theFont;
1153 if (!fontToUse)
1154 fontToUse = (wxFont*) &m_font;
1155
1156 SIZE sizeRect;
1157 TEXTMETRIC tm;
1158
1159 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1160 GetTextMetrics(GetHdc(), &tm);
1161
1162 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1163 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1164 if (descent) *descent = tm.tmDescent;
1165 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1166 }
1167
1168 void wxDC::SetMapMode(int mode)
1169 {
1170 m_mappingMode = mode;
1171
1172 int pixel_width = 0;
1173 int pixel_height = 0;
1174 int mm_width = 0;
1175 int mm_height = 0;
1176
1177 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1178 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1179 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1180 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1181
1182 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1183 {
1184 return;
1185 }
1186
1187 double mm2pixelsX = pixel_width/mm_width;
1188 double mm2pixelsY = pixel_height/mm_height;
1189
1190 switch (mode)
1191 {
1192 case wxMM_TWIPS:
1193 {
1194 m_logicalScaleX = (twips2mm * mm2pixelsX);
1195 m_logicalScaleY = (twips2mm * mm2pixelsY);
1196 break;
1197 }
1198 case wxMM_POINTS:
1199 {
1200 m_logicalScaleX = (pt2mm * mm2pixelsX);
1201 m_logicalScaleY = (pt2mm * mm2pixelsY);
1202 break;
1203 }
1204 case wxMM_METRIC:
1205 {
1206 m_logicalScaleX = mm2pixelsX;
1207 m_logicalScaleY = mm2pixelsY;
1208 break;
1209 }
1210 case wxMM_LOMETRIC:
1211 {
1212 m_logicalScaleX = (mm2pixelsX/10.0);
1213 m_logicalScaleY = (mm2pixelsY/10.0);
1214 break;
1215 }
1216 default:
1217 case wxMM_TEXT:
1218 {
1219 m_logicalScaleX = 1.0;
1220 m_logicalScaleY = 1.0;
1221 break;
1222 }
1223 }
1224
1225 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1226 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1227
1228 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1229 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1230 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1231 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1232 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1233 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1234 }
1235
1236 void wxDC::SetUserScale(double x, double y)
1237 {
1238 m_userScaleX = x;
1239 m_userScaleY = y;
1240
1241 SetMapMode(m_mappingMode);
1242 }
1243
1244 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1245 {
1246 m_signX = xLeftRight ? 1 : -1;
1247 m_signY = yBottomUp ? -1 : 1;
1248
1249 SetMapMode(m_mappingMode);
1250 }
1251
1252 void wxDC::SetSystemScale(double x, double y)
1253 {
1254 m_scaleX = x;
1255 m_scaleY = y;
1256
1257 SetMapMode(m_mappingMode);
1258 }
1259
1260 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1261 {
1262 m_logicalOriginX = x;
1263 m_logicalOriginY = y;
1264
1265 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1266 }
1267
1268 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1269 {
1270 m_deviceOriginX = x;
1271 m_deviceOriginY = y;
1272
1273 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1274 }
1275
1276 // ---------------------------------------------------------------------------
1277 // coordinates transformations
1278 // ---------------------------------------------------------------------------
1279
1280 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1281 {
1282 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1283 }
1284
1285 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1286 {
1287 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1288 }
1289
1290 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1291 {
1292 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1293 }
1294
1295 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1296 {
1297 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1298 }
1299
1300 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1301 {
1302 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1303 }
1304
1305 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1306 {
1307 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1308 }
1309
1310 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1311 {
1312 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1313 }
1314
1315 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1316 {
1317 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1318 }
1319
1320 // ---------------------------------------------------------------------------
1321 // bit blit
1322 // ---------------------------------------------------------------------------
1323
1324 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1325 wxCoord width, wxCoord height,
1326 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1327 int rop, bool useMask)
1328 {
1329 wxMask *mask = NULL;
1330 if ( useMask )
1331 {
1332 const wxBitmap& bmp = source->m_selectedBitmap;
1333 mask = bmp.GetMask();
1334
1335 if ( !(bmp.Ok() && mask && mask->GetMaskBitmap()) )
1336 {
1337 // don't give assert here because this would break existing
1338 // programs - just silently ignore useMask parameter
1339 useMask = FALSE;
1340 }
1341 }
1342
1343 COLORREF old_textground = ::GetTextColor(GetHdc());
1344 COLORREF old_background = ::GetBkColor(GetHdc());
1345 if (m_textForegroundColour.Ok())
1346 {
1347 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1348 }
1349 if (m_textBackgroundColour.Ok())
1350 {
1351 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1352 }
1353
1354 DWORD dwRop = SRCCOPY;
1355 switch (rop)
1356 {
1357 case wxXOR: dwRop = SRCINVERT; break;
1358 case wxINVERT: dwRop = DSTINVERT; break;
1359 case wxOR_REVERSE: dwRop = 0x00DD0228; break;
1360 case wxAND_REVERSE: dwRop = SRCERASE; break;
1361 case wxCLEAR: dwRop = BLACKNESS; break;
1362 case wxSET: dwRop = WHITENESS; break;
1363 case wxOR_INVERT: dwRop = MERGEPAINT; break;
1364 case wxAND: dwRop = SRCAND; break;
1365 case wxOR: dwRop = SRCPAINT; break;
1366 case wxEQUIV: dwRop = 0x00990066; break;
1367 case wxNAND: dwRop = 0x007700E6; break;
1368 case wxAND_INVERT: dwRop = 0x00220326; break;
1369 case wxCOPY: dwRop = SRCCOPY; break;
1370 case wxNO_OP: dwRop = DSTCOPY; break;
1371 case wxSRC_INVERT: dwRop = NOTSRCCOPY; break;
1372 case wxNOR: dwRop = NOTSRCCOPY; break;
1373 default:
1374 wxFAIL_MSG( wxT("unsupported logical function") );
1375 return FALSE;
1376 }
1377
1378 bool success;
1379
1380 if (useMask)
1381 {
1382 #ifdef __WIN32__
1383 // we want the part of the image corresponding to the mask to be
1384 // transparent, so use "DSTCOPY" ROP for the mask points (the usual
1385 // meaning of fg and bg is inverted which corresponds to wxWin notion
1386 // of the mask which is also contrary to the Windows one)
1387 success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
1388 GetHdcOf(*source), xsrc, ysrc,
1389 (HBITMAP)mask->GetMaskBitmap(), 0, 0,
1390 MAKEROP4(dwRop, DSTCOPY)) != 0;
1391
1392 if ( !success )
1393 #endif // Win32
1394 {
1395 // Blit bitmap with mask
1396
1397 // create a temp buffer bitmap and DCs to access it and the mask
1398 HDC dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
1399 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1400 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1401 ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
1402 ::SelectObject(dc_buffer, buffer_bmap);
1403
1404 // copy dest to buffer
1405 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1406 GetHdc(), xdest, ydest, SRCCOPY) )
1407 {
1408 wxLogLastError("BitBlt");
1409 }
1410
1411 // copy src to buffer using selected raster op
1412 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1413 GetHdcOf(*source), xsrc, ysrc, dwRop) )
1414 {
1415 wxLogLastError("BitBlt");
1416 }
1417
1418 // set masked area in buffer to BLACK (pixel value 0)
1419 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1420 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1421 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1422 dc_mask, xsrc, ysrc, SRCAND) )
1423 {
1424 wxLogLastError("BitBlt");
1425 }
1426
1427 // set unmasked area in dest to BLACK
1428 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1429 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1430 if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height,
1431 dc_mask, xsrc, ysrc, SRCAND) )
1432 {
1433 wxLogLastError("BitBlt");
1434 }
1435 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1436 ::SetTextColor(GetHdc(), prevCol);
1437
1438 // OR buffer to dest
1439 success = ::BitBlt(GetHdc(), xdest, ydest,
1440 (int)width, (int)height,
1441 dc_buffer, 0, 0, SRCPAINT) != 0;
1442 if ( !success )
1443 {
1444 wxLogLastError("BitBlt");
1445 }
1446
1447 // tidy up temporary DCs and bitmap
1448 ::SelectObject(dc_mask, 0);
1449 ::DeleteDC(dc_mask);
1450 ::SelectObject(dc_buffer, 0);
1451 ::DeleteDC(dc_buffer);
1452 ::DeleteObject(buffer_bmap);
1453 }
1454 }
1455 else // no mask, just BitBlt() it
1456 {
1457 success = ::BitBlt(GetHdc(), xdest, ydest,
1458 (int)width, (int)height,
1459 GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
1460 if ( !success )
1461 {
1462 wxLogLastError("BitBlt");
1463 }
1464 }
1465 ::SetTextColor(GetHdc(), old_textground);
1466 ::SetBkColor(GetHdc(), old_background);
1467
1468 return success;
1469 }
1470
1471 void wxDC::DoGetSize(int *w, int *h) const
1472 {
1473 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1474 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1475 }
1476
1477 void wxDC::DoGetSizeMM(int *w, int *h) const
1478 {
1479 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1480 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1481 }
1482
1483 wxSize wxDC::GetPPI() const
1484 {
1485 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1486 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1487
1488 return wxSize(x, y);
1489 }
1490
1491 // For use by wxWindows only, unless custom units are required.
1492 void wxDC::SetLogicalScale(double x, double y)
1493 {
1494 m_logicalScaleX = x;
1495 m_logicalScaleY = y;
1496 }
1497
1498 #if WXWIN_COMPATIBILITY
1499 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1500 float *descent, float *externalLeading,
1501 wxFont *theFont, bool use16bit) const
1502 {
1503 wxCoord x1, y1, descent1, externalLeading1;
1504 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1505 *x = x1; *y = y1;
1506 if (descent)
1507 *descent = descent1;
1508 if (externalLeading)
1509 *externalLeading = externalLeading1;
1510 }
1511 #endif
1512
1513 // ---------------------------------------------------------------------------
1514 // spline drawing code
1515 // ---------------------------------------------------------------------------
1516
1517 #if wxUSE_SPLINES
1518
1519 class wxSpline: public wxObject
1520 {
1521 public:
1522 int type;
1523 wxList *points;
1524
1525 wxSpline(wxList *list);
1526 void DeletePoints();
1527
1528 // Doesn't delete points
1529 ~wxSpline();
1530 };
1531
1532 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1533
1534 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1535 double a3, double b3, double a4, double b4);
1536 void wx_clear_stack();
1537 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1538 double *y3, double *x4, double *y4);
1539 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1540 double x4, double y4);
1541 static bool wx_spline_add_point(double x, double y);
1542 static void wx_spline_draw_point_array(wxDC *dc);
1543 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1544
1545 void wxDC::DoDrawSpline(wxList *list)
1546 {
1547 wxSpline spline(list);
1548
1549 wx_draw_open_spline(this, &spline);
1550 }
1551
1552 wxList wx_spline_point_list;
1553
1554 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1555 {
1556 wxPoint *p;
1557 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1558 double x1, y1, x2, y2;
1559
1560 wxNode *node = spline->points->First();
1561 p = (wxPoint *)node->Data();
1562
1563 x1 = p->x;
1564 y1 = p->y;
1565
1566 node = node->Next();
1567 p = (wxPoint *)node->Data();
1568
1569 x2 = p->x;
1570 y2 = p->y;
1571 cx1 = (double)((x1 + x2) / 2);
1572 cy1 = (double)((y1 + y2) / 2);
1573 cx2 = (double)((cx1 + x2) / 2);
1574 cy2 = (double)((cy1 + y2) / 2);
1575
1576 wx_spline_add_point(x1, y1);
1577
1578 while ((node = node->Next()) != NULL)
1579 {
1580 p = (wxPoint *)node->Data();
1581 x1 = x2;
1582 y1 = y2;
1583 x2 = p->x;
1584 y2 = p->y;
1585 cx4 = (double)(x1 + x2) / 2;
1586 cy4 = (double)(y1 + y2) / 2;
1587 cx3 = (double)(x1 + cx4) / 2;
1588 cy3 = (double)(y1 + cy4) / 2;
1589
1590 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1591
1592 cx1 = cx4;
1593 cy1 = cy4;
1594 cx2 = (double)(cx1 + x2) / 2;
1595 cy2 = (double)(cy1 + y2) / 2;
1596 }
1597
1598 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1599 wx_spline_add_point(x2, y2);
1600
1601 wx_spline_draw_point_array(dc);
1602
1603 }
1604
1605 /********************* CURVES FOR SPLINES *****************************
1606
1607 The following spline drawing routine is from
1608
1609 "An Algorithm for High-Speed Curve Generation"
1610 by George Merrill Chaikin,
1611 Computer Graphics and Image Processing, 3, Academic Press,
1612 1974, 346-349.
1613
1614 and
1615
1616 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1617 Computer Graphics and Image Processing, 4, Academic Press,
1618 1975, 304-310.
1619
1620 ***********************************************************************/
1621
1622 #define half(z1, z2) ((z1+z2)/2.0)
1623 #define THRESHOLD 5
1624
1625 /* iterative version */
1626
1627 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1628 double b4)
1629 {
1630 register double xmid, ymid;
1631 double x1, y1, x2, y2, x3, y3, x4, y4;
1632
1633 wx_clear_stack();
1634 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1635
1636 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1637 xmid = (double)half(x2, x3);
1638 ymid = (double)half(y2, y3);
1639 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1640 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1641 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1642 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1643 } else {
1644 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1645 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1646 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1647 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1648 }
1649 }
1650 }
1651
1652
1653 /* utilities used by spline drawing routines */
1654
1655
1656 typedef struct wx_spline_stack_struct {
1657 double x1, y1, x2, y2, x3, y3, x4, y4;
1658 }
1659 Stack;
1660
1661 #define SPLINE_STACK_DEPTH 20
1662 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1663 static Stack *wx_stack_top;
1664 static int wx_stack_count;
1665
1666 void wx_clear_stack()
1667 {
1668 wx_stack_top = wx_spline_stack;
1669 wx_stack_count = 0;
1670 }
1671
1672 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1673 {
1674 wx_stack_top->x1 = x1;
1675 wx_stack_top->y1 = y1;
1676 wx_stack_top->x2 = x2;
1677 wx_stack_top->y2 = y2;
1678 wx_stack_top->x3 = x3;
1679 wx_stack_top->y3 = y3;
1680 wx_stack_top->x4 = x4;
1681 wx_stack_top->y4 = y4;
1682 wx_stack_top++;
1683 wx_stack_count++;
1684 }
1685
1686 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1687 double *x3, double *y3, double *x4, double *y4)
1688 {
1689 if (wx_stack_count == 0)
1690 return (0);
1691 wx_stack_top--;
1692 wx_stack_count--;
1693 *x1 = wx_stack_top->x1;
1694 *y1 = wx_stack_top->y1;
1695 *x2 = wx_stack_top->x2;
1696 *y2 = wx_stack_top->y2;
1697 *x3 = wx_stack_top->x3;
1698 *y3 = wx_stack_top->y3;
1699 *x4 = wx_stack_top->x4;
1700 *y4 = wx_stack_top->y4;
1701 return (1);
1702 }
1703
1704 static bool wx_spline_add_point(double x, double y)
1705 {
1706 wxPoint *point = new wxPoint;
1707 point->x = (int) x;
1708 point->y = (int) y;
1709 wx_spline_point_list.Append((wxObject*)point);
1710 return TRUE;
1711 }
1712
1713 static void wx_spline_draw_point_array(wxDC *dc)
1714 {
1715 dc->DrawLines(&wx_spline_point_list, 0, 0);
1716 wxNode *node = wx_spline_point_list.First();
1717 while (node)
1718 {
1719 wxPoint *point = (wxPoint *)node->Data();
1720 delete point;
1721 delete node;
1722 node = wx_spline_point_list.First();
1723 }
1724 }
1725
1726 wxSpline::wxSpline(wxList *list)
1727 {
1728 points = list;
1729 }
1730
1731 wxSpline::~wxSpline()
1732 {
1733 }
1734
1735 void wxSpline::DeletePoints()
1736 {
1737 for(wxNode *node = points->First(); node; node = points->First())
1738 {
1739 wxPoint *point = (wxPoint *)node->Data();
1740 delete point;
1741 delete node;
1742 }
1743 delete points;
1744 }
1745
1746
1747 #endif // wxUSE_SPLINES
1748
wxWidgets (Impactor)