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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 #if wxUSE_COMMON_DIALOGS
49 #if wxUSE_NORLANDER_HEADERS
50 #include <windows.h>
51 #endif
52 #include <commdlg.h>
53 #endif
54
55 #ifndef __WIN32__
56 #include <print.h>
57 #endif
58
59 #include "wx/msw/private.h"
60
61 #if !USE_SHARED_LIBRARY
62 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
63 #endif
64
65 // ---------------------------------------------------------------------------
66 // constants
67 // ---------------------------------------------------------------------------
68
69 static const int VIEWPORT_EXTENT = 1000;
70
71 static const int MM_POINTS = 9;
72 static const int MM_METRIC = 10;
73
74 // ===========================================================================
75 // implementation
76 // ===========================================================================
77
78 // ---------------------------------------------------------------------------
79 // wxDC
80 // ---------------------------------------------------------------------------
81
82 // Default constructor
83 wxDC::wxDC()
84 {
85 m_canvas = NULL;
86
87 m_oldBitmap = 0;
88 m_oldPen = 0;
89 m_oldBrush = 0;
90 m_oldFont = 0;
91 m_oldPalette = 0;
92
93 m_bOwnsDC = FALSE;
94 m_hDC = 0;
95
96 m_windowExtX = VIEWPORT_EXTENT;
97 m_windowExtY = VIEWPORT_EXTENT;
98
99 m_hDCCount = 0;
100 }
101
102
103 wxDC::~wxDC()
104 {
105 if ( m_hDC != 0 ) {
106 SelectOldObjects(m_hDC);
107 if ( m_bOwnsDC ) {
108 if ( m_canvas == NULL )
109 ::DeleteDC(GetHdc());
110 else
111 ::ReleaseDC((HWND)m_canvas->GetHWND(), GetHdc());
112 }
113 }
114
115 }
116
117 // This will select current objects out of the DC,
118 // which is what you have to do before deleting the
119 // DC.
120 void wxDC::SelectOldObjects(WXHDC dc)
121 {
122 if (dc)
123 {
124 if (m_oldBitmap)
125 {
126 ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
127 if (m_selectedBitmap.Ok())
128 {
129 m_selectedBitmap.SetSelectedInto(NULL);
130 }
131 }
132 m_oldBitmap = 0;
133 if (m_oldPen)
134 {
135 ::SelectObject((HDC) dc, (HPEN) m_oldPen);
136 }
137 m_oldPen = 0;
138 if (m_oldBrush)
139 {
140 ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
141 }
142 m_oldBrush = 0;
143 if (m_oldFont)
144 {
145 ::SelectObject((HDC) dc, (HFONT) m_oldFont);
146 }
147 m_oldFont = 0;
148 if (m_oldPalette)
149 {
150 ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE);
151 }
152 m_oldPalette = 0;
153 }
154
155 m_brush = wxNullBrush;
156 m_pen = wxNullPen;
157 m_palette = wxNullPalette;
158 m_font = wxNullFont;
159 m_backgroundBrush = wxNullBrush;
160 m_selectedBitmap = wxNullBitmap;
161 }
162
163 // ---------------------------------------------------------------------------
164 // clipping
165 // ---------------------------------------------------------------------------
166
167 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
168 {
169 m_clipping = TRUE;
170 m_clipX1 = (int)cx;
171 m_clipY1 = (int)cy;
172 m_clipX2 = (int)(cx + cw);
173 m_clipY2 = (int)(cy + ch);
174
175 DoClipping((WXHDC) m_hDC);
176 }
177
178 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
179 {
180 wxCHECK_RET( region.GetHRGN(), wxT("invalid clipping region") );
181
182 wxRect box = region.GetBox();
183
184 m_clipping = TRUE;
185 m_clipX1 = box.x;
186 m_clipY1 = box.y;
187 m_clipX2 = box.x + box.width;
188 m_clipY2 = box.y + box.height;
189
190 #ifdef __WIN16__
191 SelectClipRgn(GetHdc(), (HRGN) region.GetHRGN());
192 #else
193 ExtSelectClipRgn(GetHdc(), (HRGN) region.GetHRGN(), RGN_AND);
194 #endif
195 }
196
197 void wxDC::DoClipping(WXHDC dc)
198 {
199 if (m_clipping && dc)
200 {
201 IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1), YLOG2DEV(m_clipY1),
202 XLOG2DEV(m_clipX2), YLOG2DEV(m_clipY2));
203 }
204 }
205
206 void wxDC::DestroyClippingRegion()
207 {
208 if (m_clipping && m_hDC)
209 {
210 // TODO: this should restore the previous clipping region,
211 // so that OnPaint processing works correctly, and the update clipping region
212 // doesn't get destroyed after the first DestroyClippingRegion.
213 HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
214 SelectClipRgn(GetHdc(), rgn);
215 DeleteObject(rgn);
216 }
217 m_clipping = FALSE;
218 }
219
220 // ---------------------------------------------------------------------------
221 // query capabilities
222 // ---------------------------------------------------------------------------
223
224 bool wxDC::CanDrawBitmap() const
225 {
226 return TRUE;
227 }
228
229 bool wxDC::CanGetTextExtent() const
230 {
231 // What sort of display is it?
232 int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
233
234 return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
235 }
236
237 int wxDC::GetDepth() const
238 {
239 return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
240 }
241
242 // ---------------------------------------------------------------------------
243 // drawing
244 // ---------------------------------------------------------------------------
245
246 void wxDC::Clear()
247 {
248 RECT rect;
249 if ( m_canvas )
250 {
251 GetClientRect((HWND) m_canvas->GetHWND(), &rect);
252 }
253 else
254 {
255 wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") );
256
257 rect.left = 0; rect.top = 0;
258 rect.right = m_selectedBitmap.GetWidth();
259 rect.bottom = m_selectedBitmap.GetHeight();
260 }
261
262 (void) ::SetMapMode(GetHdc(), MM_TEXT);
263
264 DWORD colour = GetBkColor(GetHdc());
265 HBRUSH brush = CreateSolidBrush(colour);
266 FillRect(GetHdc(), &rect, brush);
267 DeleteObject(brush);
268
269 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
270 ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
271 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
272 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
273 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
274 }
275
276 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
277 {
278 (void)ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
279 col.GetPixel(),
280 style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
281 : FLOODFILLBORDER);
282
283 CalcBoundingBox(x, y);
284 }
285
286 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
287 {
288 // added by steve 29.12.94 (copied from DrawPoint)
289 // returns TRUE for pixels in the color of the current pen
290 // and FALSE for all other pixels colors
291 // if col is non-NULL return the color of the pixel
292
293 // get the color of the pixel
294 COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
295 // get the color of the pen
296 COLORREF pencolor = 0x00ffffff;
297 if (m_pen.Ok())
298 {
299 pencolor = m_pen.GetColour().GetPixel();
300 }
301
302 // return the color of the pixel
303 if(col)
304 col->Set(GetRValue(pixelcolor),GetGValue(pixelcolor),GetBValue(pixelcolor));
305
306 // check, if color of the pixels is the same as the color
307 // of the current pen
308 return(pixelcolor==pencolor);
309 }
310
311 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
312 {
313 wxCoord x1 = x-VIEWPORT_EXTENT;
314 wxCoord y1 = y-VIEWPORT_EXTENT;
315 wxCoord x2 = x+VIEWPORT_EXTENT;
316 wxCoord y2 = y+VIEWPORT_EXTENT;
317
318 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
319 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
320
321 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
322 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
323
324 CalcBoundingBox(x1, y1);
325 CalcBoundingBox(x2, y2);
326 }
327
328 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
329 {
330 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
331 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
332
333 /* MATTHEW: [6] New normalization */
334 #if WX_STANDARD_GRAPHICS
335 (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
336 #endif
337
338 CalcBoundingBox(x1, y1);
339 CalcBoundingBox(x2, y2);
340 }
341
342 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
343 {
344 double dx = xc-x1;
345 double dy = yc-y1;
346 double radius = (double)sqrt(dx*dx+dy*dy) ;;
347 if (x1==x2 && x2==y2)
348 {
349 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
350 return;
351 }
352
353 wxCoord xx1 = XLOG2DEV(x1);
354 wxCoord yy1 = YLOG2DEV(y1);
355 wxCoord xx2 = XLOG2DEV(x2);
356 wxCoord yy2 = YLOG2DEV(y2);
357 wxCoord xxc = XLOG2DEV(xc);
358 wxCoord yyc = YLOG2DEV(yc);
359 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
360
361 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
362 wxCoord xxx1 = (wxCoord) (xxc-ray);
363 wxCoord yyy1 = (wxCoord) (yyc-ray);
364 wxCoord xxx2 = (wxCoord) (xxc+ray);
365 wxCoord yyy2 = (wxCoord) (yyc+ray);
366 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
367 {
368 // Have to add 1 to bottom-right corner of rectangle
369 // to make semi-circles look right (crooked line otherwise).
370 // Unfortunately this is not a reliable method, depends
371 // on the size of shape.
372 // TODO: figure out why this happens!
373 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
374 xx1,yy1,xx2,yy2);
375 }
376 else
377 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
378 xx1,yy1,xx2,yy2);
379
380 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
381 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
382 }
383
384 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
385 {
386 COLORREF color = 0x00ffffff;
387 if (m_pen.Ok())
388 {
389 color = m_pen.GetColour().GetPixel();
390 }
391
392 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
393
394 CalcBoundingBox(x, y);
395 }
396
397 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
398 {
399 // Do things less efficiently if we have offsets
400 if (xoffset != 0 || yoffset != 0)
401 {
402 POINT *cpoints = new POINT[n];
403 int i;
404 for (i = 0; i < n; i++)
405 {
406 cpoints[i].x = (int)(points[i].x + xoffset);
407 cpoints[i].y = (int)(points[i].y + yoffset);
408
409 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
410 }
411 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
412 (void)Polygon(GetHdc(), cpoints, n);
413 SetPolyFillMode(GetHdc(),prev);
414 delete[] cpoints;
415 }
416 else
417 {
418 int i;
419 for (i = 0; i < n; i++)
420 CalcBoundingBox(points[i].x, points[i].y);
421
422 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
423 (void)Polygon(GetHdc(), (POINT*) points, n);
424 SetPolyFillMode(GetHdc(),prev);
425 }
426 }
427
428 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
429 {
430 // Do things less efficiently if we have offsets
431 if (xoffset != 0 || yoffset != 0)
432 {
433 POINT *cpoints = new POINT[n];
434 int i;
435 for (i = 0; i < n; i++)
436 {
437 cpoints[i].x = (int)(points[i].x + xoffset);
438 cpoints[i].y = (int)(points[i].y + yoffset);
439
440 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
441 }
442 (void)Polyline(GetHdc(), cpoints, n);
443 delete[] cpoints;
444 }
445 else
446 {
447 int i;
448 for (i = 0; i < n; i++)
449 CalcBoundingBox(points[i].x, points[i].y);
450
451 (void)Polyline(GetHdc(), (POINT*) points, n);
452 }
453 }
454
455 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
456 {
457 wxCoord x2 = x + width;
458 wxCoord y2 = y + height;
459
460 /* MATTHEW: [6] new normalization */
461 #if WX_STANDARD_GRAPHICS
462 bool do_brush, do_pen;
463
464 do_brush = m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT;
465 do_pen = m_pen.Ok() && m_pen.GetStyle() != wxTRANSPARENT;
466
467 if (do_brush) {
468 HPEN orig_pen = NULL;
469
470 if (do_pen || !m_pen.Ok())
471 orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
472
473 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
474 XLOG2DEV(x2) + 1, YLOG2DEV(y2) + 1);
475
476 if (do_pen || !m_pen.Ok())
477 ::SelectObject(GetHdc() , orig_pen);
478 }
479 if (do_pen) {
480 HBRUSH orig_brush = NULL;
481
482 if (do_brush || !m_brush.Ok())
483 orig_brush = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH) ::GetStockObject(NULL_BRUSH));
484
485 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
486 XLOG2DEV(x2), YLOG2DEV(y2));
487
488 if (do_brush || !m_brush.Ok())
489 ::SelectObject(GetHdc(), orig_brush);
490 }
491 #else
492 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
493 #endif
494
495 CalcBoundingBox(x, y);
496 CalcBoundingBox(x2, y2);
497 }
498
499 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
500 {
501 // Now, a negative radius value is interpreted to mean
502 // 'the proportion of the smallest X or Y dimension'
503
504 if (radius < 0.0)
505 {
506 double smallest = 0.0;
507 if (width < height)
508 smallest = width;
509 else
510 smallest = height;
511 radius = (- radius * smallest);
512 }
513
514 wxCoord x2 = (x+width);
515 wxCoord y2 = (y+height);
516
517 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
518 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
519
520 CalcBoundingBox(x, y);
521 CalcBoundingBox(x2, y2);
522 }
523
524 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
525 {
526 wxCoord x2 = (x+width);
527 wxCoord y2 = (y+height);
528
529 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
530
531 CalcBoundingBox(x, y);
532 CalcBoundingBox(x2, y2);
533 }
534
535 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
536 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
537 {
538 wxCoord x2 = (x+w);
539 wxCoord y2 = (y+h);
540
541 const double deg2rad = 3.14159265359 / 180.0;
542 int rx1 = XLOG2DEV(x+w/2);
543 int ry1 = YLOG2DEV(y+h/2);
544 int rx2 = rx1;
545 int ry2 = ry1;
546 rx1 += (int)(100.0 * abs(w) * cos(sa * deg2rad));
547 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa * deg2rad));
548 rx2 += (int)(100.0 * abs(w) * cos(ea * deg2rad));
549 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea * deg2rad));
550
551 // draw pie with NULL_PEN first and then outline otherwise a line is
552 // drawn from the start and end points to the centre
553 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
554 if (m_signY > 0)
555 {
556 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
557 rx1, ry1, rx2, ry2);
558 }
559 else
560 {
561 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
562 rx1, ry1-1, rx2, ry2-1);
563 }
564 ::SelectObject(GetHdc(), orig_pen);
565 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
566 rx1, ry1, rx2, ry2);
567
568 CalcBoundingBox(x, y);
569 CalcBoundingBox(x2, y2);
570 }
571
572 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
573 {
574 #if defined(__WIN32__) && !defined(__SC__) && !defined(__TWIN32__)
575 ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON(),
576 icon.GetWidth(), icon.GetHeight(), 0, 0, DI_NORMAL);
577 #else
578 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON());
579 #endif
580
581 CalcBoundingBox(x, y);
582 CalcBoundingBox(x+icon.GetWidth(), y+icon.GetHeight());
583 }
584
585 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
586 {
587 if (!bmp.Ok())
588 return;
589
590 // If we're not drawing transparently, and not drawing to a printer,
591 // optimize this function to use Windows functions.
592 if (!useMask && !IsKindOf(CLASSINFO(wxPrinterDC)))
593 {
594 HDC cdc = GetHdc();
595 HDC memdc = ::CreateCompatibleDC( cdc );
596 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
597
598 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
599
600 ::SelectObject( memdc, hbitmap );
601 ::BitBlt( cdc, x, y, bmp.GetWidth(), bmp.GetHeight(), memdc, 0, 0, SRCCOPY);
602 ::DeleteDC( memdc );
603 }
604 else
605 {
606 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API level
607 wxMemoryDC memDC;
608 memDC.SelectObject(bmp);
609
610 /* Not sure if we need this. The mask should leave the
611 * masked areas as per the original background of this DC.
612 */
613 /*
614 // There might be transparent areas, so make these
615 // the same colour as this DC
616 memDC.SetBackground(* GetBackground());
617 memDC.Clear();
618 */
619
620 Blit(x, y, bmp.GetWidth(), bmp.GetHeight(), & memDC, 0, 0, wxCOPY, useMask);
621
622 memDC.SelectObject(wxNullBitmap);
623 }
624 }
625
626 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
627 {
628 if (m_textForegroundColour.Ok())
629 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
630
631 DWORD old_background = 0;
632 if (m_textBackgroundColour.Ok())
633 {
634 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
635 }
636
637 if (m_backgroundMode == wxTRANSPARENT)
638 SetBkMode(GetHdc(), TRANSPARENT);
639 else
640 SetBkMode(GetHdc(), OPAQUE);
641
642 (void)TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), WXSTRINGCAST text, wxStrlen(WXSTRINGCAST text));
643
644 if (m_textBackgroundColour.Ok())
645 (void)SetBkColor(GetHdc(), old_background);
646
647 // background colour is used only for DrawText, otherwise
648 // always TRANSPARENT, RR
649 SetBkMode(GetHdc(), TRANSPARENT);
650
651 CalcBoundingBox(x, y);
652
653 wxCoord w, h;
654 GetTextExtent(text, &w, &h);
655 CalcBoundingBox((x + w), (y + h));
656 }
657
658 void wxDC::DoDrawRotatedText(const wxString& text,
659 wxCoord x, wxCoord y,
660 double angle)
661 {
662 wxFAIL_MSG( _T("TODO") );
663 }
664
665 // ---------------------------------------------------------------------------
666 // set GDI objects
667 // ---------------------------------------------------------------------------
668
669 void wxDC::SetPalette(const wxPalette& palette)
670 {
671 // Set the old object temporarily, in case the assignment deletes an object
672 // that's not yet selected out.
673 if (m_oldPalette)
674 {
675 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
676 m_oldPalette = 0;
677 }
678
679 m_palette = palette;
680
681 if (!m_palette.Ok())
682 {
683 // Setting a NULL colourmap is a way of restoring
684 // the original colourmap
685 if (m_oldPalette)
686 {
687 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
688 m_oldPalette = 0;
689 }
690
691 return;
692 }
693
694 if (m_palette.Ok() && m_palette.GetHPALETTE())
695 {
696 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
697 if (!m_oldPalette)
698 m_oldPalette = (WXHPALETTE) oldPal;
699
700 ::RealizePalette(GetHdc());
701 }
702 }
703
704 void wxDC::SetFont(const wxFont& the_font)
705 {
706 // Set the old object temporarily, in case the assignment deletes an object
707 // that's not yet selected out.
708 if (m_oldFont)
709 {
710 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
711 m_oldFont = 0;
712 }
713
714 m_font = the_font;
715
716 if (!the_font.Ok())
717 {
718 if (m_oldFont)
719 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
720 m_oldFont = 0;
721 }
722
723 if (m_font.Ok() && m_font.GetResourceHandle())
724 {
725 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
726 if (f == (HFONT) NULL)
727 {
728 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
729 }
730 if (!m_oldFont)
731 m_oldFont = (WXHFONT) f;
732 }
733 }
734
735 void wxDC::SetPen(const wxPen& pen)
736 {
737 // Set the old object temporarily, in case the assignment deletes an object
738 // that's not yet selected out.
739 if (m_oldPen)
740 {
741 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
742 m_oldPen = 0;
743 }
744
745 m_pen = pen;
746
747 if (!m_pen.Ok())
748 {
749 if (m_oldPen)
750 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
751 m_oldPen = 0;
752 }
753
754 if (m_pen.Ok())
755 {
756 if (m_pen.GetResourceHandle())
757 {
758 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
759 if (!m_oldPen)
760 m_oldPen = (WXHPEN) p;
761 }
762 }
763 }
764
765 void wxDC::SetBrush(const wxBrush& brush)
766 {
767 // Set the old object temporarily, in case the assignment deletes an object
768 // that's not yet selected out.
769 if (m_oldBrush)
770 {
771 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
772 m_oldBrush = 0;
773 }
774
775 m_brush = brush;
776
777 if (!m_brush.Ok())
778 {
779 if (m_oldBrush)
780 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
781 m_oldBrush = 0;
782 }
783
784 if (m_brush.Ok())
785 {
786 if (m_brush.GetResourceHandle())
787 {
788 HBRUSH b = 0;
789 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
790 if (!m_oldBrush)
791 m_oldBrush = (WXHBRUSH) b;
792 }
793 }
794 }
795
796 void wxDC::SetBackground(const wxBrush& brush)
797 {
798 m_backgroundBrush = brush;
799
800 if (!m_backgroundBrush.Ok())
801 return;
802
803 if (m_canvas)
804 {
805 bool customColours = TRUE;
806 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
807 // change background colours from the control-panel specified colours.
808 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
809 customColours = FALSE;
810
811 if (customColours)
812 {
813 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
814 {
815 m_canvas->SetTransparent(TRUE);
816 }
817 else
818 {
819 // New behaviour, 10/2/99: setting the background brush of a DC
820 // doesn't affect the window background colour. However,
821 // I'm leaving in the transparency setting because it's needed by
822 // various controls (e.g. wxStaticText) to determine whether to draw
823 // transparently or not. TODO: maybe this should be a new function
824 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
825 // parent?
826 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
827 m_canvas->SetTransparent(FALSE);
828 }
829 }
830 }
831 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
832 {
833 (void)SetBkColor(GetHdc(), new_color);
834 }
835 }
836
837 void wxDC::SetBackgroundMode(int mode)
838 {
839 m_backgroundMode = mode;
840
841 // SetBackgroundColour now only refers to text background
842 // and m_backgroundMode is used there
843
844 /*
845 if (m_backgroundMode == wxTRANSPARENT)
846 ::SetBkMode(GetHdc(), TRANSPARENT);
847 else
848 ::SetBkMode(GetHdc(), OPAQUE);
849 */
850 }
851
852 void wxDC::SetLogicalFunction(int function)
853 {
854 m_logicalFunction = function;
855
856 SetRop((WXHDC) m_hDC);
857 }
858
859 void wxDC::SetRop(WXHDC dc)
860 {
861 if (!dc || m_logicalFunction < 0)
862 return;
863
864 int c_rop;
865 // These may be wrong
866 switch (m_logicalFunction)
867 {
868 // case wxXOR: c_rop = R2_XORPEN; break;
869 case wxXOR: c_rop = R2_NOTXORPEN; break;
870 case wxINVERT: c_rop = R2_NOT; break;
871 case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break;
872 case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break;
873 case wxCLEAR: c_rop = R2_WHITE; break;
874 case wxSET: c_rop = R2_BLACK; break;
875 case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break;
876 case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break;
877 case wxAND: c_rop = R2_MASKPEN; break;
878 case wxOR: c_rop = R2_MERGEPEN; break;
879 case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break;
880 case wxEQUIV:
881 case wxNAND:
882 case wxCOPY:
883 default:
884 c_rop = R2_COPYPEN; break;
885 }
886 SetROP2((HDC) dc, c_rop);
887 }
888
889 bool wxDC::StartDoc(const wxString& message)
890 {
891 // We might be previewing, so return TRUE to let it continue.
892 return TRUE;
893 }
894
895 void wxDC::EndDoc()
896 {
897 }
898
899 void wxDC::StartPage()
900 {
901 }
902
903 void wxDC::EndPage()
904 {
905 }
906
907 // ---------------------------------------------------------------------------
908 // text metrics
909 // ---------------------------------------------------------------------------
910
911 wxCoord wxDC::GetCharHeight() const
912 {
913 TEXTMETRIC lpTextMetric;
914
915 GetTextMetrics(GetHdc(), &lpTextMetric);
916
917 return YDEV2LOGREL(lpTextMetric.tmHeight);
918 }
919
920 wxCoord wxDC::GetCharWidth() const
921 {
922 TEXTMETRIC lpTextMetric;
923
924 GetTextMetrics(GetHdc(), &lpTextMetric);
925
926 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
927 }
928
929 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
930 wxCoord *descent, wxCoord *externalLeading,
931 wxFont *theFont) const
932 {
933 wxFont *fontToUse = (wxFont*) theFont;
934 if (!fontToUse)
935 fontToUse = (wxFont*) &m_font;
936
937 SIZE sizeRect;
938 TEXTMETRIC tm;
939
940 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
941 GetTextMetrics(GetHdc(), &tm);
942
943 if (x) *x = XDEV2LOGREL(sizeRect.cx);
944 if (y) *y = YDEV2LOGREL(sizeRect.cy);
945 if (descent) *descent = tm.tmDescent;
946 if (externalLeading) *externalLeading = tm.tmExternalLeading;
947 }
948
949 void wxDC::SetMapMode(int mode)
950 {
951 m_mappingMode = mode;
952
953 int pixel_width = 0;
954 int pixel_height = 0;
955 int mm_width = 0;
956 int mm_height = 0;
957
958 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
959 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
960 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
961 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
962
963 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
964 {
965 return;
966 }
967
968 double mm2pixelsX = pixel_width/mm_width;
969 double mm2pixelsY = pixel_height/mm_height;
970
971 switch (mode)
972 {
973 case wxMM_TWIPS:
974 {
975 m_logicalScaleX = (twips2mm * mm2pixelsX);
976 m_logicalScaleY = (twips2mm * mm2pixelsY);
977 break;
978 }
979 case wxMM_POINTS:
980 {
981 m_logicalScaleX = (pt2mm * mm2pixelsX);
982 m_logicalScaleY = (pt2mm * mm2pixelsY);
983 break;
984 }
985 case wxMM_METRIC:
986 {
987 m_logicalScaleX = mm2pixelsX;
988 m_logicalScaleY = mm2pixelsY;
989 break;
990 }
991 case wxMM_LOMETRIC:
992 {
993 m_logicalScaleX = (mm2pixelsX/10.0);
994 m_logicalScaleY = (mm2pixelsY/10.0);
995 break;
996 }
997 default:
998 case wxMM_TEXT:
999 {
1000 m_logicalScaleX = 1.0;
1001 m_logicalScaleY = 1.0;
1002 break;
1003 }
1004 }
1005
1006 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1007 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1008
1009 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1010 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1011 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1012 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1013 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1014 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1015 }
1016
1017 void wxDC::SetUserScale(double x, double y)
1018 {
1019 m_userScaleX = x;
1020 m_userScaleY = y;
1021
1022 SetMapMode(m_mappingMode);
1023 }
1024
1025 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1026 {
1027 m_signX = xLeftRight ? 1 : -1;
1028 m_signY = yBottomUp ? -1 : 1;
1029
1030 SetMapMode(m_mappingMode);
1031 }
1032
1033 void wxDC::SetSystemScale(double x, double y)
1034 {
1035 m_scaleX = x;
1036 m_scaleY = y;
1037
1038 SetMapMode(m_mappingMode);
1039 }
1040
1041 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1042 {
1043 m_logicalOriginX = x;
1044 m_logicalOriginY = y;
1045
1046 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1047 }
1048
1049 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1050 {
1051 m_deviceOriginX = x;
1052 m_deviceOriginY = y;
1053
1054 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1055 }
1056
1057 // ---------------------------------------------------------------------------
1058 // coordinates transformations
1059 // ---------------------------------------------------------------------------
1060
1061 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1062 {
1063 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1064 }
1065
1066 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1067 {
1068 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1069 }
1070
1071 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1072 {
1073 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1074 }
1075
1076 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1077 {
1078 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1079 }
1080
1081 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1082 {
1083 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1084 }
1085
1086 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1087 {
1088 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1089 }
1090
1091 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1092 {
1093 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1094 }
1095
1096 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1097 {
1098 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1099 }
1100
1101 // ---------------------------------------------------------------------------
1102 // bit blit
1103 // ---------------------------------------------------------------------------
1104 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
1105 wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop, bool useMask)
1106 {
1107 wxCoord xdest1 = xdest;
1108 wxCoord ydest1 = ydest;
1109 wxCoord xsrc1 = xsrc;
1110 wxCoord ysrc1 = ysrc;
1111
1112 // Chris Breeze 18/5/98: use text foreground/background colours
1113 // when blitting from 1-bit bitmaps
1114 COLORREF old_textground = ::GetTextColor(GetHdc());
1115 COLORREF old_background = ::GetBkColor(GetHdc());
1116 if (m_textForegroundColour.Ok())
1117 {
1118 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1119 }
1120 if (m_textBackgroundColour.Ok())
1121 {
1122 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1123 }
1124
1125 DWORD dwRop = rop == wxCOPY ? SRCCOPY :
1126 rop == wxCLEAR ? WHITENESS :
1127 rop == wxSET ? BLACKNESS :
1128 rop == wxINVERT ? DSTINVERT :
1129 rop == wxAND ? MERGECOPY :
1130 rop == wxOR ? MERGEPAINT :
1131 rop == wxSRC_INVERT ? NOTSRCCOPY :
1132 rop == wxXOR ? SRCINVERT :
1133 rop == wxOR_REVERSE ? MERGEPAINT :
1134 rop == wxAND_REVERSE ? SRCERASE :
1135 rop == wxSRC_OR ? SRCPAINT :
1136 rop == wxSRC_AND ? SRCAND :
1137 SRCCOPY;
1138
1139 bool success = TRUE;
1140 if (useMask && source->m_selectedBitmap.Ok() && source->m_selectedBitmap.GetMask())
1141 {
1142
1143 #if 0 // __WIN32__
1144 // Not implemented under Win95 (or maybe a specific device?)
1145 if (MaskBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1146 (HDC) source->m_hDC, xsrc1, ysrc1, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap(),
1147 0, 0, 0xAACC0020))
1148 {
1149 // Success
1150 }
1151 else
1152 #endif
1153 {
1154 // Old code
1155 #if 0
1156 HDC dc_mask = CreateCompatibleDC((HDC) source->m_hDC);
1157 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1158 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1159 dc_mask, xsrc1, ysrc1, 0x00220326 /* NOTSRCAND */) != 0);
1160 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1161 (HDC) source->m_hDC, xsrc1, ysrc1, SRCPAINT) != 0);
1162 ::SelectObject(dc_mask, 0);
1163 ::DeleteDC(dc_mask);
1164 #endif
1165 // New code from Chris Breeze, 15/7/98
1166 // Blit bitmap with mask
1167
1168 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1169 {
1170 // If we are printing source colours are screen colours
1171 // not printer colours and so we need copy the bitmap
1172 // pixel by pixel.
1173 RECT rect;
1174 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1175 HDC dc_src = (HDC) source->m_hDC;
1176
1177 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1178 for (int x = 0; x < width; x++)
1179 {
1180 for (int y = 0; y < height; y++)
1181 {
1182 COLORREF cref = ::GetPixel(dc_mask, x, y);
1183 if (cref)
1184 {
1185 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1186 rect.left = xdest1 + x; rect.right = rect.left + 1;
1187 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1188 ::FillRect(GetHdc(), &rect, brush);
1189 ::DeleteObject(brush);
1190 }
1191 }
1192 }
1193 ::SelectObject(dc_mask, 0);
1194 ::DeleteDC(dc_mask);
1195 }
1196 else
1197 {
1198 // create a temp buffer bitmap and DCs to access it and the mask
1199 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1200 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1201 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1202 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1203 ::SelectObject(dc_buffer, buffer_bmap);
1204
1205 // copy dest to buffer
1206 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1207 GetHdc(), xdest1, ydest1, SRCCOPY);
1208
1209 // copy src to buffer using selected raster op
1210 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1211 (HDC) source->m_hDC, xsrc1, ysrc1, dwRop);
1212
1213 // set masked area in buffer to BLACK (pixel value 0)
1214 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1215 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1216 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1217 dc_mask, xsrc1, ysrc1, SRCAND);
1218
1219 // set unmasked area in dest to BLACK
1220 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1221 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1222 ::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1223 dc_mask, xsrc1, ysrc1, SRCAND);
1224 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1225 ::SetTextColor(GetHdc(), prevCol);
1226
1227 // OR buffer to dest
1228 success = (::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1229 dc_buffer, 0, 0, SRCPAINT) != 0);
1230
1231 // tidy up temporary DCs and bitmap
1232 ::SelectObject(dc_mask, 0);
1233 ::DeleteDC(dc_mask);
1234 ::SelectObject(dc_buffer, 0);
1235 ::DeleteDC(dc_buffer);
1236 ::DeleteObject(buffer_bmap);
1237 }
1238 }
1239 }
1240 else
1241 {
1242 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1243 {
1244 // If we are printing, source colours are screen colours
1245 // not printer colours and so we need copy the bitmap
1246 // pixel by pixel.
1247 HDC dc_src = (HDC) source->m_hDC;
1248 RECT rect;
1249 for (int x = 0; x < width; x++)
1250 {
1251 for (int y = 0; y < height; y++)
1252 {
1253 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1254 rect.left = xdest1 + x; rect.right = rect.left + 1;
1255 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1256 ::FillRect(GetHdc(), &rect, brush);
1257 ::DeleteObject(brush);
1258 }
1259 }
1260 }
1261 else
1262 {
1263 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height, (HDC) source->m_hDC,
1264 xsrc1, ysrc1, dwRop) != 0);
1265 }
1266 }
1267 ::SetTextColor(GetHdc(), old_textground);
1268 ::SetBkColor(GetHdc(), old_background);
1269
1270 return success;
1271 }
1272
1273 void wxDC::DoGetSize(int *w, int *h) const
1274 {
1275 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1276 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1277 }
1278
1279 void wxDC::DoGetSizeMM(int *w, int *h) const
1280 {
1281 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1282 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1283 }
1284
1285 wxSize wxDC::GetPPI() const
1286 {
1287 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1288 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1289
1290 return wxSize(x, y);
1291 }
1292
1293 // For use by wxWindows only, unless custom units are required.
1294 void wxDC::SetLogicalScale(double x, double y)
1295 {
1296 m_logicalScaleX = x;
1297 m_logicalScaleY = y;
1298 }
1299
1300 #if WXWIN_COMPATIBILITY
1301 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1302 float *descent, float *externalLeading,
1303 wxFont *theFont, bool use16bit) const
1304 {
1305 wxCoord x1, y1, descent1, externalLeading1;
1306 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1307 *x = x1; *y = y1;
1308 if (descent)
1309 *descent = descent1;
1310 if (externalLeading)
1311 *externalLeading = externalLeading1;
1312 }
1313 #endif
1314
1315 // ---------------------------------------------------------------------------
1316 // spline drawing code
1317 // ---------------------------------------------------------------------------
1318
1319 #if wxUSE_SPLINES
1320
1321 class wxSpline: public wxObject
1322 {
1323 public:
1324 int type;
1325 wxList *points;
1326
1327 wxSpline(wxList *list);
1328 void DeletePoints();
1329
1330 // Doesn't delete points
1331 ~wxSpline();
1332 };
1333
1334 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1335
1336 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1337 double a3, double b3, double a4, double b4);
1338 void wx_clear_stack();
1339 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1340 double *y3, double *x4, double *y4);
1341 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1342 double x4, double y4);
1343 static bool wx_spline_add_point(double x, double y);
1344 static void wx_spline_draw_point_array(wxDC *dc);
1345 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1346
1347 void wxDC::DoDrawSpline(wxList *list)
1348 {
1349 wxSpline spline(list);
1350
1351 wx_draw_open_spline(this, &spline);
1352 }
1353
1354 wxList wx_spline_point_list;
1355
1356 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1357 {
1358 wxPoint *p;
1359 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1360 double x1, y1, x2, y2;
1361
1362 wxNode *node = spline->points->First();
1363 p = (wxPoint *)node->Data();
1364
1365 x1 = p->x;
1366 y1 = p->y;
1367
1368 node = node->Next();
1369 p = (wxPoint *)node->Data();
1370
1371 x2 = p->x;
1372 y2 = p->y;
1373 cx1 = (double)((x1 + x2) / 2);
1374 cy1 = (double)((y1 + y2) / 2);
1375 cx2 = (double)((cx1 + x2) / 2);
1376 cy2 = (double)((cy1 + y2) / 2);
1377
1378 wx_spline_add_point(x1, y1);
1379
1380 while ((node = node->Next()) != NULL)
1381 {
1382 p = (wxPoint *)node->Data();
1383 x1 = x2;
1384 y1 = y2;
1385 x2 = p->x;
1386 y2 = p->y;
1387 cx4 = (double)(x1 + x2) / 2;
1388 cy4 = (double)(y1 + y2) / 2;
1389 cx3 = (double)(x1 + cx4) / 2;
1390 cy3 = (double)(y1 + cy4) / 2;
1391
1392 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1393
1394 cx1 = cx4;
1395 cy1 = cy4;
1396 cx2 = (double)(cx1 + x2) / 2;
1397 cy2 = (double)(cy1 + y2) / 2;
1398 }
1399
1400 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1401 wx_spline_add_point(x2, y2);
1402
1403 wx_spline_draw_point_array(dc);
1404
1405 }
1406
1407 /********************* CURVES FOR SPLINES *****************************
1408
1409 The following spline drawing routine is from
1410
1411 "An Algorithm for High-Speed Curve Generation"
1412 by George Merrill Chaikin,
1413 Computer Graphics and Image Processing, 3, Academic Press,
1414 1974, 346-349.
1415
1416 and
1417
1418 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1419 Computer Graphics and Image Processing, 4, Academic Press,
1420 1975, 304-310.
1421
1422 ***********************************************************************/
1423
1424 #define half(z1, z2) ((z1+z2)/2.0)
1425 #define THRESHOLD 5
1426
1427 /* iterative version */
1428
1429 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1430 double b4)
1431 {
1432 register double xmid, ymid;
1433 double x1, y1, x2, y2, x3, y3, x4, y4;
1434
1435 wx_clear_stack();
1436 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1437
1438 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1439 xmid = (double)half(x2, x3);
1440 ymid = (double)half(y2, y3);
1441 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1442 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1443 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1444 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1445 } else {
1446 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1447 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1448 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1449 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1450 }
1451 }
1452 }
1453
1454
1455 /* utilities used by spline drawing routines */
1456
1457
1458 typedef struct wx_spline_stack_struct {
1459 double x1, y1, x2, y2, x3, y3, x4, y4;
1460 }
1461 Stack;
1462
1463 #define SPLINE_STACK_DEPTH 20
1464 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1465 static Stack *wx_stack_top;
1466 static int wx_stack_count;
1467
1468 void wx_clear_stack()
1469 {
1470 wx_stack_top = wx_spline_stack;
1471 wx_stack_count = 0;
1472 }
1473
1474 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1475 {
1476 wx_stack_top->x1 = x1;
1477 wx_stack_top->y1 = y1;
1478 wx_stack_top->x2 = x2;
1479 wx_stack_top->y2 = y2;
1480 wx_stack_top->x3 = x3;
1481 wx_stack_top->y3 = y3;
1482 wx_stack_top->x4 = x4;
1483 wx_stack_top->y4 = y4;
1484 wx_stack_top++;
1485 wx_stack_count++;
1486 }
1487
1488 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1489 double *x3, double *y3, double *x4, double *y4)
1490 {
1491 if (wx_stack_count == 0)
1492 return (0);
1493 wx_stack_top--;
1494 wx_stack_count--;
1495 *x1 = wx_stack_top->x1;
1496 *y1 = wx_stack_top->y1;
1497 *x2 = wx_stack_top->x2;
1498 *y2 = wx_stack_top->y2;
1499 *x3 = wx_stack_top->x3;
1500 *y3 = wx_stack_top->y3;
1501 *x4 = wx_stack_top->x4;
1502 *y4 = wx_stack_top->y4;
1503 return (1);
1504 }
1505
1506 static bool wx_spline_add_point(double x, double y)
1507 {
1508 wxPoint *point = new wxPoint;
1509 point->x = (int) x;
1510 point->y = (int) y;
1511 wx_spline_point_list.Append((wxObject*)point);
1512 return TRUE;
1513 }
1514
1515 static void wx_spline_draw_point_array(wxDC *dc)
1516 {
1517 dc->DrawLines(&wx_spline_point_list, 0, 0);
1518 wxNode *node = wx_spline_point_list.First();
1519 while (node)
1520 {
1521 wxPoint *point = (wxPoint *)node->Data();
1522 delete point;
1523 delete node;
1524 node = wx_spline_point_list.First();
1525 }
1526 }
1527
1528 wxSpline::wxSpline(wxList *list)
1529 {
1530 points = list;
1531 }
1532
1533 wxSpline::~wxSpline()
1534 {
1535 }
1536
1537 void wxSpline::DeletePoints()
1538 {
1539 for(wxNode *node = points->First(); node; node = points->First())
1540 {
1541 wxPoint *point = (wxPoint *)node->Data();
1542 delete point;
1543 delete node;
1544 }
1545 delete points;
1546 }
1547
1548
1549 #endif // wxUSE_SPLINES
1550
wxWidgets (Impactor)