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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 // JACS: what was this for?
322 #if 0
323 // get the color of the pen
324 COLORREF pencolor = 0x00ffffff;
325 if (m_pen.Ok())
326 {
327 pencolor = m_pen.GetColour().GetPixel();
328 }
329 #endif
330
331 // return the color of the pixel
332 if( col )
333 {
334 col->Set(GetRValue(pixelcolor),
335 GetGValue(pixelcolor),
336 GetBValue(pixelcolor));
337 }
338
339 // check, if color of the pixels is the same as the color of the current
340 // pen and return TRUE if it is, FALSE otherwise
341 // JACS, 24/02/2000: can't understand the reason for this, so returning TRUE instead.
342 // return pixelcolor == pencolor;
343
344 return TRUE;
345 }
346
347 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
348 {
349 wxCoord x1 = x-VIEWPORT_EXTENT;
350 wxCoord y1 = y-VIEWPORT_EXTENT;
351 wxCoord x2 = x+VIEWPORT_EXTENT;
352 wxCoord y2 = y+VIEWPORT_EXTENT;
353
354 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
355 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
356
357 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
358 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
359
360 CalcBoundingBox(x1, y1);
361 CalcBoundingBox(x2, y2);
362 }
363
364 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
365 {
366 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
367 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
368
369 // Normalization: Windows doesn't draw the last point of the line.
370 // But apparently neither does GTK+, so we take it out again.
371 // (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
372
373 CalcBoundingBox(x1, y1);
374 CalcBoundingBox(x2, y2);
375 }
376
377 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
378 {
379 double dx = xc-x1;
380 double dy = yc-y1;
381 double radius = (double)sqrt(dx*dx+dy*dy) ;;
382 if (x1==x2 && x2==y2)
383 {
384 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
385 return;
386 }
387
388 wxCoord xx1 = XLOG2DEV(x1);
389 wxCoord yy1 = YLOG2DEV(y1);
390 wxCoord xx2 = XLOG2DEV(x2);
391 wxCoord yy2 = YLOG2DEV(y2);
392 wxCoord xxc = XLOG2DEV(xc);
393 wxCoord yyc = YLOG2DEV(yc);
394 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
395
396 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
397 wxCoord xxx1 = (wxCoord) (xxc-ray);
398 wxCoord yyy1 = (wxCoord) (yyc-ray);
399 wxCoord xxx2 = (wxCoord) (xxc+ray);
400 wxCoord yyy2 = (wxCoord) (yyc+ray);
401 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
402 {
403 // Have to add 1 to bottom-right corner of rectangle
404 // to make semi-circles look right (crooked line otherwise).
405 // Unfortunately this is not a reliable method, depends
406 // on the size of shape.
407 // TODO: figure out why this happens!
408 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
409 xx1,yy1,xx2,yy2);
410 }
411 else
412 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
413 xx1,yy1,xx2,yy2);
414
415 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
416 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
417 }
418
419 void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
420 wxCoord width, wxCoord height)
421 {
422 wxCoord x2 = x1 + width,
423 y2 = y1 + height;
424
425 #if defined(__WIN32__) && !defined(__SC__)
426 RECT rect;
427 rect.left = x1;
428 rect.top = y1;
429 rect.right = x2;
430 rect.bottom = y2;
431
432 DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
433 #else // Win16
434 // In WIN16, draw a cross
435 HPEN blackPen = ::CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
436 HPEN whiteBrush = (HPEN)::GetStockObject(WHITE_BRUSH);
437 HPEN hPenOld = (HPEN)::SelectObject(GetHdc(), blackPen);
438 HPEN hBrushOld = (HPEN)::SelectObject(GetHdc(), whiteBrush);
439 ::SetROP2(GetHdc(), R2_COPYPEN);
440 Rectangle(GetHdc(), x1, y1, x2, y2);
441 MoveTo(GetHdc(), x1, y1);
442 LineTo(GetHdc(), x2, y2);
443 MoveTo(GetHdc(), x2, y1);
444 LineTo(GetHdc(), x1, y2);
445 ::SelectObject(GetHdc(), hPenOld);
446 ::SelectObject(GetHdc(), hBrushOld);
447 ::DeleteObject(blackPen);
448 #endif // Win32/16
449
450 CalcBoundingBox(x1, y1);
451 CalcBoundingBox(x2, y2);
452 }
453
454 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
455 {
456 COLORREF color = 0x00ffffff;
457 if (m_pen.Ok())
458 {
459 color = m_pen.GetColour().GetPixel();
460 }
461
462 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
463
464 CalcBoundingBox(x, y);
465 }
466
467 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
468 {
469 COLORREF old_textground = ::GetTextColor(GetHdc());
470 COLORREF old_background = ::GetBkColor(GetHdc());
471 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
472 {
473
474 if (m_textForegroundColour.Ok())
475 { //just the oposite from what is expected see help on pattern brush
476 // 1 in mask becomes bk color
477 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel() );
478 }
479 if (m_textBackgroundColour.Ok())
480 { //just the oposite from what is expected
481 // 0 in mask becomes text color
482 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel() );
483 }
484
485 if (m_backgroundMode == wxTRANSPARENT)
486 SetBkMode(GetHdc(), TRANSPARENT);
487 else
488 SetBkMode(GetHdc(), OPAQUE);
489 }
490
491 // Do things less efficiently if we have offsets
492 if (xoffset != 0 || yoffset != 0)
493 {
494 POINT *cpoints = new POINT[n];
495 int i;
496 for (i = 0; i < n; i++)
497 {
498 cpoints[i].x = (int)(points[i].x + xoffset);
499 cpoints[i].y = (int)(points[i].y + yoffset);
500
501 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
502 }
503 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
504 (void)Polygon(GetHdc(), cpoints, n);
505 SetPolyFillMode(GetHdc(),prev);
506 delete[] cpoints;
507 }
508 else
509 {
510 int i;
511 for (i = 0; i < n; i++)
512 CalcBoundingBox(points[i].x, points[i].y);
513
514 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
515 (void)Polygon(GetHdc(), (POINT*) points, n);
516 SetPolyFillMode(GetHdc(),prev);
517 }
518
519 if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE)
520 {
521 ::SetBkMode(GetHdc(), TRANSPARENT);
522 ::SetTextColor(GetHdc(), old_textground);
523 ::SetBkColor(GetHdc(), old_background);
524 }
525 }
526
527 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
528 {
529 // Do things less efficiently if we have offsets
530 if (xoffset != 0 || yoffset != 0)
531 {
532 POINT *cpoints = new POINT[n];
533 int i;
534 for (i = 0; i < n; i++)
535 {
536 cpoints[i].x = (int)(points[i].x + xoffset);
537 cpoints[i].y = (int)(points[i].y + yoffset);
538
539 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
540 }
541 (void)Polyline(GetHdc(), cpoints, n);
542 delete[] cpoints;
543 }
544 else
545 {
546 int i;
547 for (i = 0; i < n; i++)
548 CalcBoundingBox(points[i].x, points[i].y);
549
550 (void)Polyline(GetHdc(), (POINT*) points, n);
551 }
552 }
553
554 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
555 {
556 COLORREF colFgOld = 0,
557 colBgOld = 0;
558
559 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
560 {
561 colFgOld = ::GetTextColor(GetHdc());
562 colBgOld = ::GetBkColor(GetHdc());
563
564 if ( m_textForegroundColour.Ok() )
565 {
566 // just the oposite from what is expected see help on pattern brush
567 // 1 in mask becomes bk color
568 ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel());
569 }
570
571 if ( m_textBackgroundColour.Ok() )
572 {
573 // 0 in mask becomes text color
574 ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel());
575 }
576
577 // VZ: IMHO this does strictly nothing here
578 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
579 : OPAQUE);
580 }
581
582 wxCoord x2 = x + width;
583 wxCoord y2 = y + height;
584
585 if ((m_logicalFunction == wxCOPY) && (m_pen.GetStyle() == wxTRANSPARENT))
586 {
587 RECT rect;
588 rect.left = XLOG2DEV(x);
589 rect.top = YLOG2DEV(y);
590 rect.right = XLOG2DEV(x2);
591 rect.bottom = YLOG2DEV(y2);
592 (void)FillRect(GetHdc(), &rect, (HBRUSH)m_brush.GetResourceHandle() );
593 }
594 else
595 {
596 // Windows draws the filled rectangles without outline (i.e. drawn with a
597 // transparent pen) one pixel smaller in both directions and we want them
598 // to have the same size regardless of which pen is used - adjust
599
600 // I wonder if this shouldn´t be done after the LOG2DEV() conversions. RR.
601 if ( m_pen.GetStyle() == wxTRANSPARENT )
602 {
603 x2++;
604 y2++;
605 }
606
607 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
608 }
609
610
611 CalcBoundingBox(x, y);
612 CalcBoundingBox(x2, y2);
613
614 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
615 {
616 // restore the colours we changed
617 ::SetBkMode(GetHdc(), TRANSPARENT);
618 ::SetTextColor(GetHdc(), colFgOld);
619 ::SetBkColor(GetHdc(), colBgOld);
620 }
621 }
622
623 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
624 {
625 // Now, a negative radius value is interpreted to mean
626 // 'the proportion of the smallest X or Y dimension'
627
628 if (radius < 0.0)
629 {
630 double smallest = 0.0;
631 if (width < height)
632 smallest = width;
633 else
634 smallest = height;
635 radius = (- radius * smallest);
636 }
637
638 wxCoord x2 = (x+width);
639 wxCoord y2 = (y+height);
640
641 // Windows draws the filled rectangles without outline (i.e. drawn with a
642 // transparent pen) one pixel smaller in both directions and we want them
643 // to have the same size regardless of which pen is used - adjust
644 if ( m_pen.GetStyle() == wxTRANSPARENT )
645 {
646 x2++;
647 y2++;
648 }
649
650 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
651 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
652
653 CalcBoundingBox(x, y);
654 CalcBoundingBox(x2, y2);
655 }
656
657 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
658 {
659 wxCoord x2 = (x+width);
660 wxCoord y2 = (y+height);
661
662 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
663
664 CalcBoundingBox(x, y);
665 CalcBoundingBox(x2, y2);
666 }
667
668 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
669 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
670 {
671 wxCoord x2 = (x+w);
672 wxCoord y2 = (y+h);
673
674 int rx1 = XLOG2DEV(x+w/2);
675 int ry1 = YLOG2DEV(y+h/2);
676 int rx2 = rx1;
677 int ry2 = ry1;
678
679 sa = DegToRad(sa);
680 ea = DegToRad(ea);
681
682 rx1 += (int)(100.0 * abs(w) * cos(sa));
683 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
684 rx2 += (int)(100.0 * abs(w) * cos(ea));
685 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
686
687 // draw pie with NULL_PEN first and then outline otherwise a line is
688 // drawn from the start and end points to the centre
689 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
690 if (m_signY > 0)
691 {
692 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
693 rx1, ry1, rx2, ry2);
694 }
695 else
696 {
697 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
698 rx1, ry1-1, rx2, ry2-1);
699 }
700 ::SelectObject(GetHdc(), orig_pen);
701 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
702 rx1, ry1, rx2, ry2);
703
704 CalcBoundingBox(x, y);
705 CalcBoundingBox(x2, y2);
706 }
707
708 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
709 {
710 wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
711
712 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon));
713
714 CalcBoundingBox(x, y);
715 CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
716 }
717
718 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
719 {
720 wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
721
722 int width = bmp.GetWidth(),
723 height = bmp.GetHeight();
724
725 HBITMAP hbmpMask = 0;
726
727 if ( useMask )
728 {
729 wxMask *mask = bmp.GetMask();
730 if ( mask )
731 hbmpMask = (HBITMAP)mask->GetMaskBitmap();
732
733 if ( !hbmpMask )
734 {
735 // don't give assert here because this would break existing
736 // programs - just silently ignore useMask parameter
737 useMask = FALSE;
738 }
739 }
740
741 if ( useMask )
742 {
743 #ifdef __WIN32__
744 HDC hdcMem = ::CreateCompatibleDC(GetHdc());
745 ::SelectObject(hdcMem, GetHbitmapOf(bmp));
746
747 // use MaskBlt() with ROP which doesn't do anything to dst in the mask
748 // points
749 bool ok = ::MaskBlt(GetHdc(), x, y, width, height,
750 hdcMem, 0, 0,
751 hbmpMask, 0, 0,
752 MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
753 ::DeleteDC(hdcMem);
754
755 if ( !ok )
756 #endif // Win32
757 {
758 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API
759 // level
760 wxMemoryDC memDC;
761 memDC.SelectObject(bmp);
762
763 Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
764
765 memDC.SelectObject(wxNullBitmap);
766 }
767 }
768 else // no mask, just use BitBlt()
769 {
770 HDC cdc = GetHdc();
771 HDC memdc = ::CreateCompatibleDC( cdc );
772 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
773
774 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
775
776 COLORREF old_textground = ::GetTextColor(GetHdc());
777 COLORREF old_background = ::GetBkColor(GetHdc());
778 if (m_textForegroundColour.Ok())
779 {
780 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
781 }
782 if (m_textBackgroundColour.Ok())
783 {
784 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
785 }
786
787 ::SelectObject( memdc, hbitmap );
788 ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
789 ::DeleteDC( memdc );
790
791 ::SetTextColor(GetHdc(), old_textground);
792 ::SetBkColor(GetHdc(), old_background);
793 }
794 }
795
796 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
797 {
798 DrawAnyText(text, x, y);
799
800 // update the bounding box
801 CalcBoundingBox(x, y);
802
803 wxCoord w, h;
804 GetTextExtent(text, &w, &h);
805 CalcBoundingBox(x + w, y + h);
806 }
807
808 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
809 {
810 // prepare for drawing the text
811 if ( m_textForegroundColour.Ok() )
812 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
813
814 DWORD old_background = 0;
815 if ( m_textBackgroundColour.Ok() )
816 {
817 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
818 }
819
820 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
821 : OPAQUE);
822
823 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
824 text.c_str(), text.length()) == 0 )
825 {
826 wxLogLastError("TextOut");
827 }
828
829 // restore the old parameters (text foreground colour may be left because
830 // it never is set to anything else, but background should remain
831 // transparent even if we just drew an opaque string)
832 if ( m_textBackgroundColour.Ok() )
833 (void)SetBkColor(GetHdc(), old_background);
834
835 SetBkMode(GetHdc(), TRANSPARENT);
836 }
837
838 void wxDC::DoDrawRotatedText(const wxString& text,
839 wxCoord x, wxCoord y,
840 double angle)
841 {
842 // we test that we have some font because otherwise we should still use the
843 // "else" part below to avoid that DrawRotatedText(angle = 180) and
844 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
845 // font for drawing rotated fonts unfortunately)
846 if ( (angle == 0.0) && m_font.Ok() )
847 {
848 DoDrawText(text, x, y);
849 }
850 else
851 {
852 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
853 // can't have non zero orientation/escapement
854 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
855 HFONT hfont = (HFONT)font.GetResourceHandle();
856 LOGFONT lf;
857 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
858 {
859 wxLogLastError("GetObject(hfont)");
860 }
861
862 // GDI wants the angle in tenth of degree
863 long angle10 = (long)(angle * 10);
864 lf.lfEscapement = angle10;
865 lf. lfOrientation = angle10;
866
867 hfont = ::CreateFontIndirect(&lf);
868 if ( !hfont )
869 {
870 wxLogLastError("CreateFont");
871 }
872 else
873 {
874 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
875
876 DrawAnyText(text, x, y);
877
878 (void)::SelectObject(GetHdc(), hfontOld);
879 (void)::DeleteObject(hfont);
880 }
881
882 // call the bounding box by adding all four vertices of the rectangle
883 // containing the text to it (simpler and probably not slower than
884 // determining which of them is really topmost/leftmost/...)
885 wxCoord w, h;
886 GetTextExtent(text, &w, &h);
887
888 double rad = DegToRad(angle);
889
890 // "upper left" and "upper right"
891 CalcBoundingBox(x, y);
892 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
893
894 // "bottom left" and "bottom right"
895 x += (wxCoord)(h*sin(rad));
896 y += (wxCoord)(h*cos(rad));
897 CalcBoundingBox(x, y);
898 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
899 }
900 }
901
902 // ---------------------------------------------------------------------------
903 // set GDI objects
904 // ---------------------------------------------------------------------------
905
906 void wxDC::SetPalette(const wxPalette& palette)
907 {
908 // Set the old object temporarily, in case the assignment deletes an object
909 // that's not yet selected out.
910 if (m_oldPalette)
911 {
912 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
913 m_oldPalette = 0;
914 }
915
916 m_palette = palette;
917
918 if (!m_palette.Ok())
919 {
920 // Setting a NULL colourmap is a way of restoring
921 // the original colourmap
922 if (m_oldPalette)
923 {
924 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
925 m_oldPalette = 0;
926 }
927
928 return;
929 }
930
931 if (m_palette.Ok() && m_palette.GetHPALETTE())
932 {
933 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
934 if (!m_oldPalette)
935 m_oldPalette = (WXHPALETTE) oldPal;
936
937 ::RealizePalette(GetHdc());
938 }
939 }
940
941 void wxDC::SetFont(const wxFont& the_font)
942 {
943 // Set the old object temporarily, in case the assignment deletes an object
944 // that's not yet selected out.
945 if (m_oldFont)
946 {
947 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
948 m_oldFont = 0;
949 }
950
951 m_font = the_font;
952
953 if (!the_font.Ok())
954 {
955 if (m_oldFont)
956 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
957 m_oldFont = 0;
958 }
959
960 if (m_font.Ok() && m_font.GetResourceHandle())
961 {
962 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
963 if (f == (HFONT) NULL)
964 {
965 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
966 }
967 if (!m_oldFont)
968 m_oldFont = (WXHFONT) f;
969 }
970 }
971
972 void wxDC::SetPen(const wxPen& pen)
973 {
974 // Set the old object temporarily, in case the assignment deletes an object
975 // that's not yet selected out.
976 if (m_oldPen)
977 {
978 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
979 m_oldPen = 0;
980 }
981
982 m_pen = pen;
983
984 if (!m_pen.Ok())
985 {
986 if (m_oldPen)
987 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
988 m_oldPen = 0;
989 }
990
991 if (m_pen.Ok())
992 {
993 if (m_pen.GetResourceHandle())
994 {
995 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
996 if (!m_oldPen)
997 m_oldPen = (WXHPEN) p;
998 }
999 }
1000 }
1001
1002 void wxDC::SetBrush(const wxBrush& brush)
1003 {
1004 // Set the old object temporarily, in case the assignment deletes an object
1005 // that's not yet selected out.
1006 if (m_oldBrush)
1007 {
1008 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
1009 m_oldBrush = 0;
1010 }
1011
1012 m_brush = brush;
1013
1014 if (!m_brush.Ok())
1015 {
1016 if (m_oldBrush)
1017 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
1018 m_oldBrush = 0;
1019 }
1020
1021 if (m_brush.Ok())
1022 {
1023 if (m_brush.GetResourceHandle())
1024 {
1025 HBRUSH b = 0;
1026 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
1027 if (!m_oldBrush)
1028 m_oldBrush = (WXHBRUSH) b;
1029 }
1030 }
1031 }
1032
1033 void wxDC::SetBackground(const wxBrush& brush)
1034 {
1035 m_backgroundBrush = brush;
1036
1037 if (!m_backgroundBrush.Ok())
1038 return;
1039
1040 if (m_canvas)
1041 {
1042 bool customColours = TRUE;
1043 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
1044 // change background colours from the control-panel specified colours.
1045 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
1046 customColours = FALSE;
1047
1048 if (customColours)
1049 {
1050 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
1051 {
1052 m_canvas->SetTransparent(TRUE);
1053 }
1054 else
1055 {
1056 // New behaviour, 10/2/99: setting the background brush of a DC
1057 // doesn't affect the window background colour. However,
1058 // I'm leaving in the transparency setting because it's needed by
1059 // various controls (e.g. wxStaticText) to determine whether to draw
1060 // transparently or not. TODO: maybe this should be a new function
1061 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
1062 // parent?
1063 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
1064 m_canvas->SetTransparent(FALSE);
1065 }
1066 }
1067 }
1068 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
1069 {
1070 (void)SetBkColor(GetHdc(), new_color);
1071 }
1072 }
1073
1074 void wxDC::SetBackgroundMode(int mode)
1075 {
1076 m_backgroundMode = mode;
1077
1078 // SetBackgroundColour now only refers to text background
1079 // and m_backgroundMode is used there
1080
1081 /*
1082 if (m_backgroundMode == wxTRANSPARENT)
1083 ::SetBkMode(GetHdc(), TRANSPARENT);
1084 else
1085 ::SetBkMode(GetHdc(), OPAQUE);
1086 */
1087 }
1088
1089 void wxDC::SetLogicalFunction(int function)
1090 {
1091 m_logicalFunction = function;
1092
1093 SetRop(m_hDC);
1094 }
1095
1096 void wxDC::SetRop(WXHDC dc)
1097 {
1098 if ( !dc || m_logicalFunction < 0 )
1099 return;
1100
1101 int rop;
1102
1103 switch (m_logicalFunction)
1104 {
1105 case wxCLEAR: rop = R2_BLACK; break;
1106 case wxXOR: rop = R2_XORPEN; break;
1107 case wxINVERT: rop = R2_NOT; break;
1108 case wxOR_REVERSE: rop = R2_MERGEPENNOT; break;
1109 case wxAND_REVERSE: rop = R2_MASKPENNOT; break;
1110 case wxCOPY: rop = R2_COPYPEN; break;
1111 case wxAND: rop = R2_MASKPEN; break;
1112 case wxAND_INVERT: rop = R2_MASKNOTPEN; break;
1113 case wxNO_OP: rop = R2_NOP; break;
1114 case wxNOR: rop = R2_NOTMERGEPEN; break;
1115 case wxEQUIV: rop = R2_NOTXORPEN; break;
1116 case wxSRC_INVERT: rop = R2_NOTCOPYPEN; break;
1117 case wxOR_INVERT: rop = R2_MERGENOTPEN; break;
1118 case wxNAND: rop = R2_NOTMASKPEN; break;
1119 case wxOR: rop = R2_MERGEPEN; break;
1120 case wxSET: rop = R2_WHITE; break;
1121
1122 default:
1123 wxFAIL_MSG( wxT("unsupported logical function") );
1124 return;
1125 }
1126
1127 SetROP2(GetHdc(), rop);
1128 }
1129
1130 bool wxDC::StartDoc(const wxString& message)
1131 {
1132 // We might be previewing, so return TRUE to let it continue.
1133 return TRUE;
1134 }
1135
1136 void wxDC::EndDoc()
1137 {
1138 }
1139
1140 void wxDC::StartPage()
1141 {
1142 }
1143
1144 void wxDC::EndPage()
1145 {
1146 }
1147
1148 // ---------------------------------------------------------------------------
1149 // text metrics
1150 // ---------------------------------------------------------------------------
1151
1152 wxCoord wxDC::GetCharHeight() const
1153 {
1154 TEXTMETRIC lpTextMetric;
1155
1156 GetTextMetrics(GetHdc(), &lpTextMetric);
1157
1158 return YDEV2LOGREL(lpTextMetric.tmHeight);
1159 }
1160
1161 wxCoord wxDC::GetCharWidth() const
1162 {
1163 TEXTMETRIC lpTextMetric;
1164
1165 GetTextMetrics(GetHdc(), &lpTextMetric);
1166
1167 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1168 }
1169
1170 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1171 wxCoord *descent, wxCoord *externalLeading,
1172 wxFont *theFont) const
1173 {
1174 wxFont *fontToUse = (wxFont*) theFont;
1175 if (!fontToUse)
1176 fontToUse = (wxFont*) &m_font;
1177
1178 SIZE sizeRect;
1179 TEXTMETRIC tm;
1180
1181 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1182 GetTextMetrics(GetHdc(), &tm);
1183
1184 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1185 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1186 if (descent) *descent = tm.tmDescent;
1187 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1188 }
1189
1190 void wxDC::SetMapMode(int mode)
1191 {
1192 m_mappingMode = mode;
1193
1194 int pixel_width = 0;
1195 int pixel_height = 0;
1196 int mm_width = 0;
1197 int mm_height = 0;
1198
1199 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1200 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1201 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1202 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1203
1204 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1205 {
1206 return;
1207 }
1208
1209 double mm2pixelsX = pixel_width/mm_width;
1210 double mm2pixelsY = pixel_height/mm_height;
1211
1212 switch (mode)
1213 {
1214 case wxMM_TWIPS:
1215 {
1216 m_logicalScaleX = (twips2mm * mm2pixelsX);
1217 m_logicalScaleY = (twips2mm * mm2pixelsY);
1218 break;
1219 }
1220 case wxMM_POINTS:
1221 {
1222 m_logicalScaleX = (pt2mm * mm2pixelsX);
1223 m_logicalScaleY = (pt2mm * mm2pixelsY);
1224 break;
1225 }
1226 case wxMM_METRIC:
1227 {
1228 m_logicalScaleX = mm2pixelsX;
1229 m_logicalScaleY = mm2pixelsY;
1230 break;
1231 }
1232 case wxMM_LOMETRIC:
1233 {
1234 m_logicalScaleX = (mm2pixelsX/10.0);
1235 m_logicalScaleY = (mm2pixelsY/10.0);
1236 break;
1237 }
1238 default:
1239 case wxMM_TEXT:
1240 {
1241 m_logicalScaleX = 1.0;
1242 m_logicalScaleY = 1.0;
1243 break;
1244 }
1245 }
1246
1247 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1248 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1249
1250 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1251 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1252 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1253 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1254 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1255 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1256 }
1257
1258 void wxDC::SetUserScale(double x, double y)
1259 {
1260 m_userScaleX = x;
1261 m_userScaleY = y;
1262
1263 SetMapMode(m_mappingMode);
1264 }
1265
1266 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1267 {
1268 m_signX = xLeftRight ? 1 : -1;
1269 m_signY = yBottomUp ? -1 : 1;
1270
1271 SetMapMode(m_mappingMode);
1272 }
1273
1274 void wxDC::SetSystemScale(double x, double y)
1275 {
1276 m_scaleX = x;
1277 m_scaleY = y;
1278
1279 SetMapMode(m_mappingMode);
1280 }
1281
1282 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1283 {
1284 m_logicalOriginX = x;
1285 m_logicalOriginY = y;
1286
1287 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1288 }
1289
1290 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1291 {
1292 m_deviceOriginX = x;
1293 m_deviceOriginY = y;
1294
1295 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1296 }
1297
1298 // ---------------------------------------------------------------------------
1299 // coordinates transformations
1300 // ---------------------------------------------------------------------------
1301
1302 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1303 {
1304 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1305 }
1306
1307 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1308 {
1309 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1310 }
1311
1312 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1313 {
1314 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1315 }
1316
1317 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1318 {
1319 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1320 }
1321
1322 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1323 {
1324 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1325 }
1326
1327 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1328 {
1329 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1330 }
1331
1332 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1333 {
1334 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1335 }
1336
1337 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1338 {
1339 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1340 }
1341
1342 // ---------------------------------------------------------------------------
1343 // bit blit
1344 // ---------------------------------------------------------------------------
1345
1346 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1347 wxCoord width, wxCoord height,
1348 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1349 int rop, bool useMask)
1350 {
1351 wxMask *mask = NULL;
1352 if ( useMask )
1353 {
1354 const wxBitmap& bmp = source->m_selectedBitmap;
1355 mask = bmp.GetMask();
1356
1357 if ( !(bmp.Ok() && mask && mask->GetMaskBitmap()) )
1358 {
1359 // don't give assert here because this would break existing
1360 // programs - just silently ignore useMask parameter
1361 useMask = FALSE;
1362 }
1363 }
1364
1365 COLORREF old_textground = ::GetTextColor(GetHdc());
1366 COLORREF old_background = ::GetBkColor(GetHdc());
1367 if (m_textForegroundColour.Ok())
1368 {
1369 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1370 }
1371 if (m_textBackgroundColour.Ok())
1372 {
1373 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1374 }
1375
1376 DWORD dwRop = SRCCOPY;
1377 switch (rop)
1378 {
1379 case wxXOR: dwRop = SRCINVERT; break;
1380 case wxINVERT: dwRop = DSTINVERT; break;
1381 case wxOR_REVERSE: dwRop = 0x00DD0228; break;
1382 case wxAND_REVERSE: dwRop = SRCERASE; break;
1383 case wxCLEAR: dwRop = BLACKNESS; break;
1384 case wxSET: dwRop = WHITENESS; break;
1385 case wxOR_INVERT: dwRop = MERGEPAINT; break;
1386 case wxAND: dwRop = SRCAND; break;
1387 case wxOR: dwRop = SRCPAINT; break;
1388 case wxEQUIV: dwRop = 0x00990066; break;
1389 case wxNAND: dwRop = 0x007700E6; break;
1390 case wxAND_INVERT: dwRop = 0x00220326; break;
1391 case wxCOPY: dwRop = SRCCOPY; break;
1392 case wxNO_OP: dwRop = DSTCOPY; break;
1393 case wxSRC_INVERT: dwRop = NOTSRCCOPY; break;
1394 case wxNOR: dwRop = NOTSRCCOPY; break;
1395 default:
1396 wxFAIL_MSG( wxT("unsupported logical function") );
1397 return FALSE;
1398 }
1399
1400 bool success;
1401
1402 if (useMask)
1403 {
1404 #ifdef __WIN32__
1405 // we want the part of the image corresponding to the mask to be
1406 // transparent, so use "DSTCOPY" ROP for the mask points (the usual
1407 // meaning of fg and bg is inverted which corresponds to wxWin notion
1408 // of the mask which is also contrary to the Windows one)
1409 success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
1410 GetHdcOf(*source), xsrc, ysrc,
1411 (HBITMAP)mask->GetMaskBitmap(), 0, 0,
1412 MAKEROP4(dwRop, DSTCOPY)) != 0;
1413
1414 if ( !success )
1415 #endif // Win32
1416 {
1417 // Blit bitmap with mask
1418
1419 // create a temp buffer bitmap and DCs to access it and the mask
1420 HDC dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
1421 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1422 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1423 ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
1424 ::SelectObject(dc_buffer, buffer_bmap);
1425
1426 // copy dest to buffer
1427 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1428 GetHdc(), xdest, ydest, SRCCOPY) )
1429 {
1430 wxLogLastError("BitBlt");
1431 }
1432
1433 // copy src to buffer using selected raster op
1434 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1435 GetHdcOf(*source), xsrc, ysrc, dwRop) )
1436 {
1437 wxLogLastError("BitBlt");
1438 }
1439
1440 // set masked area in buffer to BLACK (pixel value 0)
1441 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1442 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1443 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1444 dc_mask, xsrc, ysrc, SRCAND) )
1445 {
1446 wxLogLastError("BitBlt");
1447 }
1448
1449 // set unmasked area in dest to BLACK
1450 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1451 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1452 if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height,
1453 dc_mask, xsrc, ysrc, SRCAND) )
1454 {
1455 wxLogLastError("BitBlt");
1456 }
1457 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1458 ::SetTextColor(GetHdc(), prevCol);
1459
1460 // OR buffer to dest
1461 success = ::BitBlt(GetHdc(), xdest, ydest,
1462 (int)width, (int)height,
1463 dc_buffer, 0, 0, SRCPAINT) != 0;
1464 if ( !success )
1465 {
1466 wxLogLastError("BitBlt");
1467 }
1468
1469 // tidy up temporary DCs and bitmap
1470 ::SelectObject(dc_mask, 0);
1471 ::DeleteDC(dc_mask);
1472 ::SelectObject(dc_buffer, 0);
1473 ::DeleteDC(dc_buffer);
1474 ::DeleteObject(buffer_bmap);
1475 }
1476 }
1477 else // no mask, just BitBlt() it
1478 {
1479 success = ::BitBlt(GetHdc(), xdest, ydest,
1480 (int)width, (int)height,
1481 GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
1482 if ( !success )
1483 {
1484 wxLogLastError("BitBlt");
1485 }
1486 }
1487 ::SetTextColor(GetHdc(), old_textground);
1488 ::SetBkColor(GetHdc(), old_background);
1489
1490 return success;
1491 }
1492
1493 void wxDC::DoGetSize(int *w, int *h) const
1494 {
1495 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1496 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1497 }
1498
1499 void wxDC::DoGetSizeMM(int *w, int *h) const
1500 {
1501 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1502 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1503 }
1504
1505 wxSize wxDC::GetPPI() const
1506 {
1507 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1508 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1509
1510 return wxSize(x, y);
1511 }
1512
1513 // For use by wxWindows only, unless custom units are required.
1514 void wxDC::SetLogicalScale(double x, double y)
1515 {
1516 m_logicalScaleX = x;
1517 m_logicalScaleY = y;
1518 }
1519
1520 #if WXWIN_COMPATIBILITY
1521 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1522 float *descent, float *externalLeading,
1523 wxFont *theFont, bool use16bit) const
1524 {
1525 wxCoord x1, y1, descent1, externalLeading1;
1526 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1527 *x = x1; *y = y1;
1528 if (descent)
1529 *descent = descent1;
1530 if (externalLeading)
1531 *externalLeading = externalLeading1;
1532 }
1533 #endif
1534
1535 // ---------------------------------------------------------------------------
1536 // spline drawing code
1537 // ---------------------------------------------------------------------------
1538
1539 #if wxUSE_SPLINES
1540
1541 class wxSpline: public wxObject
1542 {
1543 public:
1544 int type;
1545 wxList *points;
1546
1547 wxSpline(wxList *list);
1548 void DeletePoints();
1549
1550 // Doesn't delete points
1551 ~wxSpline();
1552 };
1553
1554 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1555
1556 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1557 double a3, double b3, double a4, double b4);
1558 void wx_clear_stack();
1559 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1560 double *y3, double *x4, double *y4);
1561 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1562 double x4, double y4);
1563 static bool wx_spline_add_point(double x, double y);
1564 static void wx_spline_draw_point_array(wxDC *dc);
1565 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1566
1567 void wxDC::DoDrawSpline(wxList *list)
1568 {
1569 wxSpline spline(list);
1570
1571 wx_draw_open_spline(this, &spline);
1572 }
1573
1574 wxList wx_spline_point_list;
1575
1576 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1577 {
1578 wxPoint *p;
1579 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1580 double x1, y1, x2, y2;
1581
1582 wxNode *node = spline->points->First();
1583 p = (wxPoint *)node->Data();
1584
1585 x1 = p->x;
1586 y1 = p->y;
1587
1588 node = node->Next();
1589 p = (wxPoint *)node->Data();
1590
1591 x2 = p->x;
1592 y2 = p->y;
1593 cx1 = (double)((x1 + x2) / 2);
1594 cy1 = (double)((y1 + y2) / 2);
1595 cx2 = (double)((cx1 + x2) / 2);
1596 cy2 = (double)((cy1 + y2) / 2);
1597
1598 wx_spline_add_point(x1, y1);
1599
1600 while ((node = node->Next()) != NULL)
1601 {
1602 p = (wxPoint *)node->Data();
1603 x1 = x2;
1604 y1 = y2;
1605 x2 = p->x;
1606 y2 = p->y;
1607 cx4 = (double)(x1 + x2) / 2;
1608 cy4 = (double)(y1 + y2) / 2;
1609 cx3 = (double)(x1 + cx4) / 2;
1610 cy3 = (double)(y1 + cy4) / 2;
1611
1612 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1613
1614 cx1 = cx4;
1615 cy1 = cy4;
1616 cx2 = (double)(cx1 + x2) / 2;
1617 cy2 = (double)(cy1 + y2) / 2;
1618 }
1619
1620 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1621 wx_spline_add_point(x2, y2);
1622
1623 wx_spline_draw_point_array(dc);
1624
1625 }
1626
1627 /********************* CURVES FOR SPLINES *****************************
1628
1629 The following spline drawing routine is from
1630
1631 "An Algorithm for High-Speed Curve Generation"
1632 by George Merrill Chaikin,
1633 Computer Graphics and Image Processing, 3, Academic Press,
1634 1974, 346-349.
1635
1636 and
1637
1638 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1639 Computer Graphics and Image Processing, 4, Academic Press,
1640 1975, 304-310.
1641
1642 ***********************************************************************/
1643
1644 #define half(z1, z2) ((z1+z2)/2.0)
1645 #define THRESHOLD 5
1646
1647 /* iterative version */
1648
1649 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1650 double b4)
1651 {
1652 register double xmid, ymid;
1653 double x1, y1, x2, y2, x3, y3, x4, y4;
1654
1655 wx_clear_stack();
1656 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1657
1658 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1659 xmid = (double)half(x2, x3);
1660 ymid = (double)half(y2, y3);
1661 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1662 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1663 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1664 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1665 } else {
1666 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1667 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1668 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1669 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1670 }
1671 }
1672 }
1673
1674
1675 /* utilities used by spline drawing routines */
1676
1677
1678 typedef struct wx_spline_stack_struct {
1679 double x1, y1, x2, y2, x3, y3, x4, y4;
1680 }
1681 Stack;
1682
1683 #define SPLINE_STACK_DEPTH 20
1684 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1685 static Stack *wx_stack_top;
1686 static int wx_stack_count;
1687
1688 void wx_clear_stack()
1689 {
1690 wx_stack_top = wx_spline_stack;
1691 wx_stack_count = 0;
1692 }
1693
1694 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1695 {
1696 wx_stack_top->x1 = x1;
1697 wx_stack_top->y1 = y1;
1698 wx_stack_top->x2 = x2;
1699 wx_stack_top->y2 = y2;
1700 wx_stack_top->x3 = x3;
1701 wx_stack_top->y3 = y3;
1702 wx_stack_top->x4 = x4;
1703 wx_stack_top->y4 = y4;
1704 wx_stack_top++;
1705 wx_stack_count++;
1706 }
1707
1708 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1709 double *x3, double *y3, double *x4, double *y4)
1710 {
1711 if (wx_stack_count == 0)
1712 return (0);
1713 wx_stack_top--;
1714 wx_stack_count--;
1715 *x1 = wx_stack_top->x1;
1716 *y1 = wx_stack_top->y1;
1717 *x2 = wx_stack_top->x2;
1718 *y2 = wx_stack_top->y2;
1719 *x3 = wx_stack_top->x3;
1720 *y3 = wx_stack_top->y3;
1721 *x4 = wx_stack_top->x4;
1722 *y4 = wx_stack_top->y4;
1723 return (1);
1724 }
1725
1726 static bool wx_spline_add_point(double x, double y)
1727 {
1728 wxPoint *point = new wxPoint;
1729 point->x = (int) x;
1730 point->y = (int) y;
1731 wx_spline_point_list.Append((wxObject*)point);
1732 return TRUE;
1733 }
1734
1735 static void wx_spline_draw_point_array(wxDC *dc)
1736 {
1737 dc->DrawLines(&wx_spline_point_list, 0, 0);
1738 wxNode *node = wx_spline_point_list.First();
1739 while (node)
1740 {
1741 wxPoint *point = (wxPoint *)node->Data();
1742 delete point;
1743 delete node;
1744 node = wx_spline_point_list.First();
1745 }
1746 }
1747
1748 wxSpline::wxSpline(wxList *list)
1749 {
1750 points = list;
1751 }
1752
1753 wxSpline::~wxSpline()
1754 {
1755 }
1756
1757 void wxSpline::DeletePoints()
1758 {
1759 for(wxNode *node = points->First(); node; node = points->First())
1760 {
1761 wxPoint *point = (wxPoint *)node->Data();
1762 delete point;
1763 delete node;
1764 }
1765 delete points;
1766 }
1767
1768
1769 #endif // wxUSE_SPLINES
1770
wxWidgets (Impactor)