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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 // But apparently neither does GTK+, so we take it out again.
365 // (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
366
367 CalcBoundingBox(x1, y1);
368 CalcBoundingBox(x2, y2);
369 }
370
371 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
372 {
373 double dx = xc-x1;
374 double dy = yc-y1;
375 double radius = (double)sqrt(dx*dx+dy*dy) ;;
376 if (x1==x2 && x2==y2)
377 {
378 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
379 return;
380 }
381
382 wxCoord xx1 = XLOG2DEV(x1);
383 wxCoord yy1 = YLOG2DEV(y1);
384 wxCoord xx2 = XLOG2DEV(x2);
385 wxCoord yy2 = YLOG2DEV(y2);
386 wxCoord xxc = XLOG2DEV(xc);
387 wxCoord yyc = YLOG2DEV(yc);
388 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
389
390 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
391 wxCoord xxx1 = (wxCoord) (xxc-ray);
392 wxCoord yyy1 = (wxCoord) (yyc-ray);
393 wxCoord xxx2 = (wxCoord) (xxc+ray);
394 wxCoord yyy2 = (wxCoord) (yyc+ray);
395 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
396 {
397 // Have to add 1 to bottom-right corner of rectangle
398 // to make semi-circles look right (crooked line otherwise).
399 // Unfortunately this is not a reliable method, depends
400 // on the size of shape.
401 // TODO: figure out why this happens!
402 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
403 xx1,yy1,xx2,yy2);
404 }
405 else
406 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
407 xx1,yy1,xx2,yy2);
408
409 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
410 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
411 }
412
413 void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
414 wxCoord width, wxCoord height)
415 {
416 wxCoord x2 = x1 + width,
417 y2 = y1 + height;
418
419 #if defined(__WIN32__) && !defined(__SC__)
420 RECT rect;
421 rect.left = x1;
422 rect.top = y1;
423 rect.right = x2;
424 rect.bottom = y2;
425
426 DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
427 #else // Win16
428 // In WIN16, draw a cross
429 HPEN blackPen = ::CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
430 HPEN whiteBrush = (HPEN)::GetStockObject(WHITE_BRUSH);
431 HPEN hPenOld = (HPEN)::SelectObject(hdcMem, blackPen);
432 HPEN hBrushOld = (HPEN)::SelectObject(hdcMem, whiteBrush);
433 ::SetROP2(GetHdc(), R2_COPYPEN);
434 Rectangle(GetHdc(), x1, y1, x2, y2);
435 MoveTo(GetHdc(), x1, y1);
436 LineTo(GetHdc(), x2, y2);
437 MoveTo(GetHdc(), x2, y1);
438 LineTo(GetHdc(), x1, y2);
439 ::SelectObject(GetHdc(), hPenOld);
440 ::SelectObject(GetHdc(), hBrushOld);
441 ::DeleteObject(blackPen);
442 #endif // Win32/16
443
444 CalcBoundingBox(x1, y1);
445 CalcBoundingBox(x2, y2);
446 }
447
448 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
449 {
450 COLORREF color = 0x00ffffff;
451 if (m_pen.Ok())
452 {
453 color = m_pen.GetColour().GetPixel();
454 }
455
456 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
457
458 CalcBoundingBox(x, y);
459 }
460
461 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
462 {
463 COLORREF old_textground = ::GetTextColor(GetHdc());
464 COLORREF old_background = ::GetBkColor(GetHdc());
465 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
466 {
467
468 if (m_textForegroundColour.Ok())
469 { //just the oposite from what is expected see help on pattern brush
470 // 1 in mask becomes bk color
471 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel() );
472 }
473 if (m_textBackgroundColour.Ok())
474 { //just the oposite from what is expected
475 // 0 in mask becomes text color
476 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel() );
477 }
478
479 if (m_backgroundMode == wxTRANSPARENT)
480 SetBkMode(GetHdc(), TRANSPARENT);
481 else
482 SetBkMode(GetHdc(), OPAQUE);
483 }
484
485 // Do things less efficiently if we have offsets
486 if (xoffset != 0 || yoffset != 0)
487 {
488 POINT *cpoints = new POINT[n];
489 int i;
490 for (i = 0; i < n; i++)
491 {
492 cpoints[i].x = (int)(points[i].x + xoffset);
493 cpoints[i].y = (int)(points[i].y + yoffset);
494
495 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
496 }
497 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
498 (void)Polygon(GetHdc(), cpoints, n);
499 SetPolyFillMode(GetHdc(),prev);
500 delete[] cpoints;
501 }
502 else
503 {
504 int i;
505 for (i = 0; i < n; i++)
506 CalcBoundingBox(points[i].x, points[i].y);
507
508 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
509 (void)Polygon(GetHdc(), (POINT*) points, n);
510 SetPolyFillMode(GetHdc(),prev);
511 }
512
513 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
514 {
515 ::SetBkMode(GetHdc(), TRANSPARENT);
516 ::SetTextColor(GetHdc(), old_textground);
517 ::SetBkColor(GetHdc(), old_background);
518 }
519 }
520
521 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
522 {
523 // Do things less efficiently if we have offsets
524 if (xoffset != 0 || yoffset != 0)
525 {
526 POINT *cpoints = new POINT[n];
527 int i;
528 for (i = 0; i < n; i++)
529 {
530 cpoints[i].x = (int)(points[i].x + xoffset);
531 cpoints[i].y = (int)(points[i].y + yoffset);
532
533 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
534 }
535 (void)Polyline(GetHdc(), cpoints, n);
536 delete[] cpoints;
537 }
538 else
539 {
540 int i;
541 for (i = 0; i < n; i++)
542 CalcBoundingBox(points[i].x, points[i].y);
543
544 (void)Polyline(GetHdc(), (POINT*) points, n);
545 }
546 }
547
548 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
549 {
550 COLORREF colFgOld = 0,
551 colBgOld = 0;
552
553 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
554 {
555 colFgOld = ::GetTextColor(GetHdc());
556 colBgOld = ::GetBkColor(GetHdc());
557
558 if ( m_textForegroundColour.Ok() )
559 {
560 // just the oposite from what is expected see help on pattern brush
561 // 1 in mask becomes bk color
562 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel());
563 }
564
565 if ( m_textBackgroundColour.Ok() )
566 {
567 // 0 in mask becomes text color
568 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel());
569 }
570
571 // VZ: IMHO this does strictly nothing here
572 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
573 : OPAQUE);
574 }
575
576 wxCoord x2 = x + width;
577 wxCoord y2 = y + height;
578
579 if ((m_logicalFunction == wxCOPY) && (m_pen.GetStyle() == wxTRANSPARENT))
580 {
581 RECT rect;
582 rect.left = XLOG2DEV(x);
583 rect.top = YLOG2DEV(y);
584 rect.right = XLOG2DEV(x2);
585 rect.bottom = YLOG2DEV(y2);
586 (void)FillRect(GetHdc(), &rect, (HBRUSH)m_brush.GetResourceHandle() );
587 }
588 else
589 {
590 // Windows draws the filled rectangles without outline (i.e. drawn with a
591 // transparent pen) one pixel smaller in both directions and we want them
592 // to have the same size regardless of which pen is used - adjust
593
594 // I wonder if this shouldn´t be done after the LOG2DEV() conversions. RR.
595 if ( m_pen.GetStyle() == wxTRANSPARENT )
596 {
597 x2++;
598 y2++;
599 }
600
601 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
602 }
603
604
605 CalcBoundingBox(x, y);
606 CalcBoundingBox(x2, y2);
607
608 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
609 {
610 // restore the colours we changed
611 ::SetBkMode(GetHdc(), TRANSPARENT);
612 ::SetTextColor(GetHdc(), colFgOld);
613 ::SetBkColor(GetHdc(), colBgOld);
614 }
615 }
616
617 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
618 {
619 // Now, a negative radius value is interpreted to mean
620 // 'the proportion of the smallest X or Y dimension'
621
622 if (radius < 0.0)
623 {
624 double smallest = 0.0;
625 if (width < height)
626 smallest = width;
627 else
628 smallest = height;
629 radius = (- radius * smallest);
630 }
631
632 wxCoord x2 = (x+width);
633 wxCoord y2 = (y+height);
634
635 // Windows draws the filled rectangles without outline (i.e. drawn with a
636 // transparent pen) one pixel smaller in both directions and we want them
637 // to have the same size regardless of which pen is used - adjust
638 if ( m_pen.GetStyle() == wxTRANSPARENT )
639 {
640 x2++;
641 y2++;
642 }
643
644 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
645 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
646
647 CalcBoundingBox(x, y);
648 CalcBoundingBox(x2, y2);
649 }
650
651 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
652 {
653 wxCoord x2 = (x+width);
654 wxCoord y2 = (y+height);
655
656 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
657
658 CalcBoundingBox(x, y);
659 CalcBoundingBox(x2, y2);
660 }
661
662 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
663 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
664 {
665 wxCoord x2 = (x+w);
666 wxCoord y2 = (y+h);
667
668 int rx1 = XLOG2DEV(x+w/2);
669 int ry1 = YLOG2DEV(y+h/2);
670 int rx2 = rx1;
671 int ry2 = ry1;
672
673 sa = DegToRad(sa);
674 ea = DegToRad(ea);
675
676 rx1 += (int)(100.0 * abs(w) * cos(sa));
677 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
678 rx2 += (int)(100.0 * abs(w) * cos(ea));
679 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
680
681 // draw pie with NULL_PEN first and then outline otherwise a line is
682 // drawn from the start and end points to the centre
683 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
684 if (m_signY > 0)
685 {
686 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
687 rx1, ry1, rx2, ry2);
688 }
689 else
690 {
691 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
692 rx1, ry1-1, rx2, ry2-1);
693 }
694 ::SelectObject(GetHdc(), orig_pen);
695 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
696 rx1, ry1, rx2, ry2);
697
698 CalcBoundingBox(x, y);
699 CalcBoundingBox(x2, y2);
700 }
701
702 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
703 {
704 wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
705
706 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon));
707
708 CalcBoundingBox(x, y);
709 CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
710 }
711
712 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
713 {
714 wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
715
716 int width = bmp.GetWidth(),
717 height = bmp.GetHeight();
718
719 HBITMAP hbmpMask = 0;
720
721 if ( useMask )
722 {
723 wxMask *mask = bmp.GetMask();
724 if ( mask )
725 hbmpMask = (HBITMAP)mask->GetMaskBitmap();
726
727 if ( !hbmpMask )
728 {
729 // don't give assert here because this would break existing
730 // programs - just silently ignore useMask parameter
731 useMask = FALSE;
732 }
733 }
734
735 if ( useMask )
736 {
737 #ifdef __WIN32__
738 HDC hdcMem = ::CreateCompatibleDC(GetHdc());
739 ::SelectObject(hdcMem, GetHbitmapOf(bmp));
740
741 // use MaskBlt() with ROP which doesn't do anything to dst in the mask
742 // points
743 bool ok = ::MaskBlt(GetHdc(), x, y, width, height,
744 hdcMem, 0, 0,
745 hbmpMask, 0, 0,
746 MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
747 ::DeleteDC(hdcMem);
748
749 if ( !ok )
750 #endif // Win32
751 {
752 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API
753 // level
754 wxMemoryDC memDC;
755 memDC.SelectObject(bmp);
756
757 Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
758
759 memDC.SelectObject(wxNullBitmap);
760 }
761 }
762 else // no mask, just use BitBlt()
763 {
764 HDC cdc = GetHdc();
765 HDC memdc = ::CreateCompatibleDC( cdc );
766 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
767
768 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
769
770 COLORREF old_textground = ::GetTextColor(GetHdc());
771 COLORREF old_background = ::GetBkColor(GetHdc());
772 if (m_textForegroundColour.Ok())
773 {
774 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
775 }
776 if (m_textBackgroundColour.Ok())
777 {
778 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
779 }
780
781 ::SelectObject( memdc, hbitmap );
782 ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
783 ::DeleteDC( memdc );
784
785 ::SetTextColor(GetHdc(), old_textground);
786 ::SetBkColor(GetHdc(), old_background);
787 }
788 }
789
790 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
791 {
792 DrawAnyText(text, x, y);
793
794 // update the bounding box
795 CalcBoundingBox(x, y);
796
797 wxCoord w, h;
798 GetTextExtent(text, &w, &h);
799 CalcBoundingBox(x + w, y + h);
800 }
801
802 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
803 {
804 // prepare for drawing the text
805 if ( m_textForegroundColour.Ok() )
806 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
807
808 DWORD old_background = 0;
809 if ( m_textBackgroundColour.Ok() )
810 {
811 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
812 }
813
814 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
815 : OPAQUE);
816
817 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
818 text.c_str(), text.length()) == 0 )
819 {
820 wxLogLastError("TextOut");
821 }
822
823 // restore the old parameters (text foreground colour may be left because
824 // it never is set to anything else, but background should remain
825 // transparent even if we just drew an opaque string)
826 if ( m_textBackgroundColour.Ok() )
827 (void)SetBkColor(GetHdc(), old_background);
828
829 SetBkMode(GetHdc(), TRANSPARENT);
830 }
831
832 void wxDC::DoDrawRotatedText(const wxString& text,
833 wxCoord x, wxCoord y,
834 double angle)
835 {
836 // we test that we have some font because otherwise we should still use the
837 // "else" part below to avoid that DrawRotatedText(angle = 180) and
838 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
839 // font for drawing rotated fonts unfortunately)
840 if ( (angle == 0.0) && m_font.Ok() )
841 {
842 DoDrawText(text, x, y);
843 }
844 else
845 {
846 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
847 // can't have non zero orientation/escapement
848 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
849 HFONT hfont = (HFONT)font.GetResourceHandle();
850 LOGFONT lf;
851 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
852 {
853 wxLogLastError("GetObject(hfont)");
854 }
855
856 // GDI wants the angle in tenth of degree
857 long angle10 = (long)(angle * 10);
858 lf.lfEscapement = angle10;
859 lf. lfOrientation = angle10;
860
861 hfont = ::CreateFontIndirect(&lf);
862 if ( !hfont )
863 {
864 wxLogLastError("CreateFont");
865 }
866 else
867 {
868 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
869
870 DrawAnyText(text, x, y);
871
872 (void)::SelectObject(GetHdc(), hfontOld);
873 (void)::DeleteObject(hfont);
874 }
875
876 // call the bounding box by adding all four vertices of the rectangle
877 // containing the text to it (simpler and probably not slower than
878 // determining which of them is really topmost/leftmost/...)
879 wxCoord w, h;
880 GetTextExtent(text, &w, &h);
881
882 double rad = DegToRad(angle);
883
884 // "upper left" and "upper right"
885 CalcBoundingBox(x, y);
886 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
887
888 // "bottom left" and "bottom right"
889 x += (wxCoord)(h*sin(rad));
890 y += (wxCoord)(h*cos(rad));
891 CalcBoundingBox(x, y);
892 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
893 }
894 }
895
896 // ---------------------------------------------------------------------------
897 // set GDI objects
898 // ---------------------------------------------------------------------------
899
900 void wxDC::SetPalette(const wxPalette& palette)
901 {
902 // Set the old object temporarily, in case the assignment deletes an object
903 // that's not yet selected out.
904 if (m_oldPalette)
905 {
906 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
907 m_oldPalette = 0;
908 }
909
910 m_palette = palette;
911
912 if (!m_palette.Ok())
913 {
914 // Setting a NULL colourmap is a way of restoring
915 // the original colourmap
916 if (m_oldPalette)
917 {
918 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
919 m_oldPalette = 0;
920 }
921
922 return;
923 }
924
925 if (m_palette.Ok() && m_palette.GetHPALETTE())
926 {
927 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
928 if (!m_oldPalette)
929 m_oldPalette = (WXHPALETTE) oldPal;
930
931 ::RealizePalette(GetHdc());
932 }
933 }
934
935 void wxDC::SetFont(const wxFont& the_font)
936 {
937 // Set the old object temporarily, in case the assignment deletes an object
938 // that's not yet selected out.
939 if (m_oldFont)
940 {
941 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
942 m_oldFont = 0;
943 }
944
945 m_font = the_font;
946
947 if (!the_font.Ok())
948 {
949 if (m_oldFont)
950 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
951 m_oldFont = 0;
952 }
953
954 if (m_font.Ok() && m_font.GetResourceHandle())
955 {
956 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
957 if (f == (HFONT) NULL)
958 {
959 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
960 }
961 if (!m_oldFont)
962 m_oldFont = (WXHFONT) f;
963 }
964 }
965
966 void wxDC::SetPen(const wxPen& pen)
967 {
968 // Set the old object temporarily, in case the assignment deletes an object
969 // that's not yet selected out.
970 if (m_oldPen)
971 {
972 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
973 m_oldPen = 0;
974 }
975
976 m_pen = pen;
977
978 if (!m_pen.Ok())
979 {
980 if (m_oldPen)
981 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
982 m_oldPen = 0;
983 }
984
985 if (m_pen.Ok())
986 {
987 if (m_pen.GetResourceHandle())
988 {
989 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
990 if (!m_oldPen)
991 m_oldPen = (WXHPEN) p;
992 }
993 }
994 }
995
996 void wxDC::SetBrush(const wxBrush& brush)
997 {
998 // Set the old object temporarily, in case the assignment deletes an object
999 // that's not yet selected out.
1000 if (m_oldBrush)
1001 {
1002 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
1003 m_oldBrush = 0;
1004 }
1005
1006 m_brush = brush;
1007
1008 if (!m_brush.Ok())
1009 {
1010 if (m_oldBrush)
1011 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
1012 m_oldBrush = 0;
1013 }
1014
1015 if (m_brush.Ok())
1016 {
1017 if (m_brush.GetResourceHandle())
1018 {
1019 HBRUSH b = 0;
1020 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
1021 if (!m_oldBrush)
1022 m_oldBrush = (WXHBRUSH) b;
1023 }
1024 }
1025 }
1026
1027 void wxDC::SetBackground(const wxBrush& brush)
1028 {
1029 m_backgroundBrush = brush;
1030
1031 if (!m_backgroundBrush.Ok())
1032 return;
1033
1034 if (m_canvas)
1035 {
1036 bool customColours = TRUE;
1037 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
1038 // change background colours from the control-panel specified colours.
1039 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
1040 customColours = FALSE;
1041
1042 if (customColours)
1043 {
1044 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
1045 {
1046 m_canvas->SetTransparent(TRUE);
1047 }
1048 else
1049 {
1050 // New behaviour, 10/2/99: setting the background brush of a DC
1051 // doesn't affect the window background colour. However,
1052 // I'm leaving in the transparency setting because it's needed by
1053 // various controls (e.g. wxStaticText) to determine whether to draw
1054 // transparently or not. TODO: maybe this should be a new function
1055 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
1056 // parent?
1057 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
1058 m_canvas->SetTransparent(FALSE);
1059 }
1060 }
1061 }
1062 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
1063 {
1064 (void)SetBkColor(GetHdc(), new_color);
1065 }
1066 }
1067
1068 void wxDC::SetBackgroundMode(int mode)
1069 {
1070 m_backgroundMode = mode;
1071
1072 // SetBackgroundColour now only refers to text background
1073 // and m_backgroundMode is used there
1074
1075 /*
1076 if (m_backgroundMode == wxTRANSPARENT)
1077 ::SetBkMode(GetHdc(), TRANSPARENT);
1078 else
1079 ::SetBkMode(GetHdc(), OPAQUE);
1080 */
1081 }
1082
1083 void wxDC::SetLogicalFunction(int function)
1084 {
1085 m_logicalFunction = function;
1086
1087 SetRop(m_hDC);
1088 }
1089
1090 void wxDC::SetRop(WXHDC dc)
1091 {
1092 if ( !dc || m_logicalFunction < 0 )
1093 return;
1094
1095 int rop;
1096
1097 switch (m_logicalFunction)
1098 {
1099 case wxCLEAR: rop = R2_BLACK; break;
1100 case wxXOR: rop = R2_XORPEN; break;
1101 case wxINVERT: rop = R2_NOT; break;
1102 case wxOR_REVERSE: rop = R2_MERGEPENNOT; break;
1103 case wxAND_REVERSE: rop = R2_MASKPENNOT; break;
1104 case wxCOPY: rop = R2_COPYPEN; break;
1105 case wxAND: rop = R2_MASKPEN; break;
1106 case wxAND_INVERT: rop = R2_MASKNOTPEN; break;
1107 case wxNO_OP: rop = R2_NOP; break;
1108 case wxNOR: rop = R2_NOTMERGEPEN; break;
1109 case wxEQUIV: rop = R2_NOTXORPEN; break;
1110 case wxSRC_INVERT: rop = R2_NOTCOPYPEN; break;
1111 case wxOR_INVERT: rop = R2_MERGENOTPEN; break;
1112 case wxNAND: rop = R2_NOTMASKPEN; break;
1113 case wxOR: rop = R2_MERGEPEN; break;
1114 case wxSET: rop = R2_WHITE; break;
1115
1116 default:
1117 wxFAIL_MSG( wxT("unsupported logical function") );
1118 return;
1119 }
1120
1121 SetROP2(GetHdc(), rop);
1122 }
1123
1124 bool wxDC::StartDoc(const wxString& message)
1125 {
1126 // We might be previewing, so return TRUE to let it continue.
1127 return TRUE;
1128 }
1129
1130 void wxDC::EndDoc()
1131 {
1132 }
1133
1134 void wxDC::StartPage()
1135 {
1136 }
1137
1138 void wxDC::EndPage()
1139 {
1140 }
1141
1142 // ---------------------------------------------------------------------------
1143 // text metrics
1144 // ---------------------------------------------------------------------------
1145
1146 wxCoord wxDC::GetCharHeight() const
1147 {
1148 TEXTMETRIC lpTextMetric;
1149
1150 GetTextMetrics(GetHdc(), &lpTextMetric);
1151
1152 return YDEV2LOGREL(lpTextMetric.tmHeight);
1153 }
1154
1155 wxCoord wxDC::GetCharWidth() const
1156 {
1157 TEXTMETRIC lpTextMetric;
1158
1159 GetTextMetrics(GetHdc(), &lpTextMetric);
1160
1161 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1162 }
1163
1164 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1165 wxCoord *descent, wxCoord *externalLeading,
1166 wxFont *theFont) const
1167 {
1168 wxFont *fontToUse = (wxFont*) theFont;
1169 if (!fontToUse)
1170 fontToUse = (wxFont*) &m_font;
1171
1172 SIZE sizeRect;
1173 TEXTMETRIC tm;
1174
1175 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1176 GetTextMetrics(GetHdc(), &tm);
1177
1178 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1179 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1180 if (descent) *descent = tm.tmDescent;
1181 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1182 }
1183
1184 void wxDC::SetMapMode(int mode)
1185 {
1186 m_mappingMode = mode;
1187
1188 int pixel_width = 0;
1189 int pixel_height = 0;
1190 int mm_width = 0;
1191 int mm_height = 0;
1192
1193 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1194 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1195 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1196 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1197
1198 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1199 {
1200 return;
1201 }
1202
1203 double mm2pixelsX = pixel_width/mm_width;
1204 double mm2pixelsY = pixel_height/mm_height;
1205
1206 switch (mode)
1207 {
1208 case wxMM_TWIPS:
1209 {
1210 m_logicalScaleX = (twips2mm * mm2pixelsX);
1211 m_logicalScaleY = (twips2mm * mm2pixelsY);
1212 break;
1213 }
1214 case wxMM_POINTS:
1215 {
1216 m_logicalScaleX = (pt2mm * mm2pixelsX);
1217 m_logicalScaleY = (pt2mm * mm2pixelsY);
1218 break;
1219 }
1220 case wxMM_METRIC:
1221 {
1222 m_logicalScaleX = mm2pixelsX;
1223 m_logicalScaleY = mm2pixelsY;
1224 break;
1225 }
1226 case wxMM_LOMETRIC:
1227 {
1228 m_logicalScaleX = (mm2pixelsX/10.0);
1229 m_logicalScaleY = (mm2pixelsY/10.0);
1230 break;
1231 }
1232 default:
1233 case wxMM_TEXT:
1234 {
1235 m_logicalScaleX = 1.0;
1236 m_logicalScaleY = 1.0;
1237 break;
1238 }
1239 }
1240
1241 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1242 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1243
1244 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1245 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1246 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1247 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1248 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1249 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1250 }
1251
1252 void wxDC::SetUserScale(double x, double y)
1253 {
1254 m_userScaleX = x;
1255 m_userScaleY = y;
1256
1257 SetMapMode(m_mappingMode);
1258 }
1259
1260 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1261 {
1262 m_signX = xLeftRight ? 1 : -1;
1263 m_signY = yBottomUp ? -1 : 1;
1264
1265 SetMapMode(m_mappingMode);
1266 }
1267
1268 void wxDC::SetSystemScale(double x, double y)
1269 {
1270 m_scaleX = x;
1271 m_scaleY = y;
1272
1273 SetMapMode(m_mappingMode);
1274 }
1275
1276 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1277 {
1278 m_logicalOriginX = x;
1279 m_logicalOriginY = y;
1280
1281 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1282 }
1283
1284 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1285 {
1286 m_deviceOriginX = x;
1287 m_deviceOriginY = y;
1288
1289 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1290 }
1291
1292 // ---------------------------------------------------------------------------
1293 // coordinates transformations
1294 // ---------------------------------------------------------------------------
1295
1296 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1297 {
1298 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1299 }
1300
1301 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1302 {
1303 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1304 }
1305
1306 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1307 {
1308 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1309 }
1310
1311 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1312 {
1313 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1314 }
1315
1316 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1317 {
1318 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1319 }
1320
1321 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1322 {
1323 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1324 }
1325
1326 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1327 {
1328 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1329 }
1330
1331 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1332 {
1333 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1334 }
1335
1336 // ---------------------------------------------------------------------------
1337 // bit blit
1338 // ---------------------------------------------------------------------------
1339
1340 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1341 wxCoord width, wxCoord height,
1342 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1343 int rop, bool useMask)
1344 {
1345 wxMask *mask = NULL;
1346 if ( useMask )
1347 {
1348 const wxBitmap& bmp = source->m_selectedBitmap;
1349 mask = bmp.GetMask();
1350
1351 if ( !(bmp.Ok() && mask && mask->GetMaskBitmap()) )
1352 {
1353 // don't give assert here because this would break existing
1354 // programs - just silently ignore useMask parameter
1355 useMask = FALSE;
1356 }
1357 }
1358
1359 COLORREF old_textground = ::GetTextColor(GetHdc());
1360 COLORREF old_background = ::GetBkColor(GetHdc());
1361 if (m_textForegroundColour.Ok())
1362 {
1363 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1364 }
1365 if (m_textBackgroundColour.Ok())
1366 {
1367 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1368 }
1369
1370 DWORD dwRop = SRCCOPY;
1371 switch (rop)
1372 {
1373 case wxXOR: dwRop = SRCINVERT; break;
1374 case wxINVERT: dwRop = DSTINVERT; break;
1375 case wxOR_REVERSE: dwRop = 0x00DD0228; break;
1376 case wxAND_REVERSE: dwRop = SRCERASE; break;
1377 case wxCLEAR: dwRop = BLACKNESS; break;
1378 case wxSET: dwRop = WHITENESS; break;
1379 case wxOR_INVERT: dwRop = MERGEPAINT; break;
1380 case wxAND: dwRop = SRCAND; break;
1381 case wxOR: dwRop = SRCPAINT; break;
1382 case wxEQUIV: dwRop = 0x00990066; break;
1383 case wxNAND: dwRop = 0x007700E6; break;
1384 case wxAND_INVERT: dwRop = 0x00220326; break;
1385 case wxCOPY: dwRop = SRCCOPY; break;
1386 case wxNO_OP: dwRop = DSTCOPY; break;
1387 case wxSRC_INVERT: dwRop = NOTSRCCOPY; break;
1388 case wxNOR: dwRop = NOTSRCCOPY; break;
1389 default:
1390 wxFAIL_MSG( wxT("unsupported logical function") );
1391 return FALSE;
1392 }
1393
1394 bool success;
1395
1396 if (useMask)
1397 {
1398 #ifdef __WIN32__
1399 // we want the part of the image corresponding to the mask to be
1400 // transparent, so use "DSTCOPY" ROP for the mask points (the usual
1401 // meaning of fg and bg is inverted which corresponds to wxWin notion
1402 // of the mask which is also contrary to the Windows one)
1403 success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
1404 GetHdcOf(*source), xsrc, ysrc,
1405 (HBITMAP)mask->GetMaskBitmap(), 0, 0,
1406 MAKEROP4(dwRop, DSTCOPY)) != 0;
1407
1408 if ( !success )
1409 #endif // Win32
1410 {
1411 // Blit bitmap with mask
1412
1413 // create a temp buffer bitmap and DCs to access it and the mask
1414 HDC dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
1415 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1416 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1417 ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
1418 ::SelectObject(dc_buffer, buffer_bmap);
1419
1420 // copy dest to buffer
1421 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1422 GetHdc(), xdest, ydest, SRCCOPY) )
1423 {
1424 wxLogLastError("BitBlt");
1425 }
1426
1427 // copy src to buffer using selected raster op
1428 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1429 GetHdcOf(*source), xsrc, ysrc, dwRop) )
1430 {
1431 wxLogLastError("BitBlt");
1432 }
1433
1434 // set masked area in buffer to BLACK (pixel value 0)
1435 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1436 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1437 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1438 dc_mask, xsrc, ysrc, SRCAND) )
1439 {
1440 wxLogLastError("BitBlt");
1441 }
1442
1443 // set unmasked area in dest to BLACK
1444 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1445 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1446 if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height,
1447 dc_mask, xsrc, ysrc, SRCAND) )
1448 {
1449 wxLogLastError("BitBlt");
1450 }
1451 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1452 ::SetTextColor(GetHdc(), prevCol);
1453
1454 // OR buffer to dest
1455 success = ::BitBlt(GetHdc(), xdest, ydest,
1456 (int)width, (int)height,
1457 dc_buffer, 0, 0, SRCPAINT) != 0;
1458 if ( !success )
1459 {
1460 wxLogLastError("BitBlt");
1461 }
1462
1463 // tidy up temporary DCs and bitmap
1464 ::SelectObject(dc_mask, 0);
1465 ::DeleteDC(dc_mask);
1466 ::SelectObject(dc_buffer, 0);
1467 ::DeleteDC(dc_buffer);
1468 ::DeleteObject(buffer_bmap);
1469 }
1470 }
1471 else // no mask, just BitBlt() it
1472 {
1473 success = ::BitBlt(GetHdc(), xdest, ydest,
1474 (int)width, (int)height,
1475 GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
1476 if ( !success )
1477 {
1478 wxLogLastError("BitBlt");
1479 }
1480 }
1481 ::SetTextColor(GetHdc(), old_textground);
1482 ::SetBkColor(GetHdc(), old_background);
1483
1484 return success;
1485 }
1486
1487 void wxDC::DoGetSize(int *w, int *h) const
1488 {
1489 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1490 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1491 }
1492
1493 void wxDC::DoGetSizeMM(int *w, int *h) const
1494 {
1495 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1496 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1497 }
1498
1499 wxSize wxDC::GetPPI() const
1500 {
1501 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1502 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1503
1504 return wxSize(x, y);
1505 }
1506
1507 // For use by wxWindows only, unless custom units are required.
1508 void wxDC::SetLogicalScale(double x, double y)
1509 {
1510 m_logicalScaleX = x;
1511 m_logicalScaleY = y;
1512 }
1513
1514 #if WXWIN_COMPATIBILITY
1515 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1516 float *descent, float *externalLeading,
1517 wxFont *theFont, bool use16bit) const
1518 {
1519 wxCoord x1, y1, descent1, externalLeading1;
1520 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1521 *x = x1; *y = y1;
1522 if (descent)
1523 *descent = descent1;
1524 if (externalLeading)
1525 *externalLeading = externalLeading1;
1526 }
1527 #endif
1528
1529 // ---------------------------------------------------------------------------
1530 // spline drawing code
1531 // ---------------------------------------------------------------------------
1532
1533 #if wxUSE_SPLINES
1534
1535 class wxSpline: public wxObject
1536 {
1537 public:
1538 int type;
1539 wxList *points;
1540
1541 wxSpline(wxList *list);
1542 void DeletePoints();
1543
1544 // Doesn't delete points
1545 ~wxSpline();
1546 };
1547
1548 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1549
1550 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1551 double a3, double b3, double a4, double b4);
1552 void wx_clear_stack();
1553 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1554 double *y3, double *x4, double *y4);
1555 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1556 double x4, double y4);
1557 static bool wx_spline_add_point(double x, double y);
1558 static void wx_spline_draw_point_array(wxDC *dc);
1559 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1560
1561 void wxDC::DoDrawSpline(wxList *list)
1562 {
1563 wxSpline spline(list);
1564
1565 wx_draw_open_spline(this, &spline);
1566 }
1567
1568 wxList wx_spline_point_list;
1569
1570 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1571 {
1572 wxPoint *p;
1573 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1574 double x1, y1, x2, y2;
1575
1576 wxNode *node = spline->points->First();
1577 p = (wxPoint *)node->Data();
1578
1579 x1 = p->x;
1580 y1 = p->y;
1581
1582 node = node->Next();
1583 p = (wxPoint *)node->Data();
1584
1585 x2 = p->x;
1586 y2 = p->y;
1587 cx1 = (double)((x1 + x2) / 2);
1588 cy1 = (double)((y1 + y2) / 2);
1589 cx2 = (double)((cx1 + x2) / 2);
1590 cy2 = (double)((cy1 + y2) / 2);
1591
1592 wx_spline_add_point(x1, y1);
1593
1594 while ((node = node->Next()) != NULL)
1595 {
1596 p = (wxPoint *)node->Data();
1597 x1 = x2;
1598 y1 = y2;
1599 x2 = p->x;
1600 y2 = p->y;
1601 cx4 = (double)(x1 + x2) / 2;
1602 cy4 = (double)(y1 + y2) / 2;
1603 cx3 = (double)(x1 + cx4) / 2;
1604 cy3 = (double)(y1 + cy4) / 2;
1605
1606 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1607
1608 cx1 = cx4;
1609 cy1 = cy4;
1610 cx2 = (double)(cx1 + x2) / 2;
1611 cy2 = (double)(cy1 + y2) / 2;
1612 }
1613
1614 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1615 wx_spline_add_point(x2, y2);
1616
1617 wx_spline_draw_point_array(dc);
1618
1619 }
1620
1621 /********************* CURVES FOR SPLINES *****************************
1622
1623 The following spline drawing routine is from
1624
1625 "An Algorithm for High-Speed Curve Generation"
1626 by George Merrill Chaikin,
1627 Computer Graphics and Image Processing, 3, Academic Press,
1628 1974, 346-349.
1629
1630 and
1631
1632 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1633 Computer Graphics and Image Processing, 4, Academic Press,
1634 1975, 304-310.
1635
1636 ***********************************************************************/
1637
1638 #define half(z1, z2) ((z1+z2)/2.0)
1639 #define THRESHOLD 5
1640
1641 /* iterative version */
1642
1643 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1644 double b4)
1645 {
1646 register double xmid, ymid;
1647 double x1, y1, x2, y2, x3, y3, x4, y4;
1648
1649 wx_clear_stack();
1650 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1651
1652 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1653 xmid = (double)half(x2, x3);
1654 ymid = (double)half(y2, y3);
1655 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1656 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1657 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1658 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1659 } else {
1660 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1661 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1662 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1663 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1664 }
1665 }
1666 }
1667
1668
1669 /* utilities used by spline drawing routines */
1670
1671
1672 typedef struct wx_spline_stack_struct {
1673 double x1, y1, x2, y2, x3, y3, x4, y4;
1674 }
1675 Stack;
1676
1677 #define SPLINE_STACK_DEPTH 20
1678 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1679 static Stack *wx_stack_top;
1680 static int wx_stack_count;
1681
1682 void wx_clear_stack()
1683 {
1684 wx_stack_top = wx_spline_stack;
1685 wx_stack_count = 0;
1686 }
1687
1688 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1689 {
1690 wx_stack_top->x1 = x1;
1691 wx_stack_top->y1 = y1;
1692 wx_stack_top->x2 = x2;
1693 wx_stack_top->y2 = y2;
1694 wx_stack_top->x3 = x3;
1695 wx_stack_top->y3 = y3;
1696 wx_stack_top->x4 = x4;
1697 wx_stack_top->y4 = y4;
1698 wx_stack_top++;
1699 wx_stack_count++;
1700 }
1701
1702 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1703 double *x3, double *y3, double *x4, double *y4)
1704 {
1705 if (wx_stack_count == 0)
1706 return (0);
1707 wx_stack_top--;
1708 wx_stack_count--;
1709 *x1 = wx_stack_top->x1;
1710 *y1 = wx_stack_top->y1;
1711 *x2 = wx_stack_top->x2;
1712 *y2 = wx_stack_top->y2;
1713 *x3 = wx_stack_top->x3;
1714 *y3 = wx_stack_top->y3;
1715 *x4 = wx_stack_top->x4;
1716 *y4 = wx_stack_top->y4;
1717 return (1);
1718 }
1719
1720 static bool wx_spline_add_point(double x, double y)
1721 {
1722 wxPoint *point = new wxPoint;
1723 point->x = (int) x;
1724 point->y = (int) y;
1725 wx_spline_point_list.Append((wxObject*)point);
1726 return TRUE;
1727 }
1728
1729 static void wx_spline_draw_point_array(wxDC *dc)
1730 {
1731 dc->DrawLines(&wx_spline_point_list, 0, 0);
1732 wxNode *node = wx_spline_point_list.First();
1733 while (node)
1734 {
1735 wxPoint *point = (wxPoint *)node->Data();
1736 delete point;
1737 delete node;
1738 node = wx_spline_point_list.First();
1739 }
1740 }
1741
1742 wxSpline::wxSpline(wxList *list)
1743 {
1744 points = list;
1745 }
1746
1747 wxSpline::~wxSpline()
1748 {
1749 }
1750
1751 void wxSpline::DeletePoints()
1752 {
1753 for(wxNode *node = points->First(); node; node = points->First())
1754 {
1755 wxPoint *point = (wxPoint *)node->Data();
1756 delete point;
1757 delete node;
1758 }
1759 delete points;
1760 }
1761
1762
1763 #endif // wxUSE_SPLINES
1764
wxWidgets (Impactor)