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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 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
62
63 // ---------------------------------------------------------------------------
64 // constants
65 // ---------------------------------------------------------------------------
66
67 static const int VIEWPORT_EXTENT = 1000;
68
69 static const int MM_POINTS = 9;
70 static const int MM_METRIC = 10;
71
72 // usually this is defined in math.h
73 #ifndef M_PI
74 static const double M_PI = 3.14159265358979323846;
75 #endif // M_PI
76
77 // ---------------------------------------------------------------------------
78 // private functions
79 // ---------------------------------------------------------------------------
80
81 // convert degrees to radians
82 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
83
84 // ===========================================================================
85 // implementation
86 // ===========================================================================
87
88 // ---------------------------------------------------------------------------
89 // wxDC
90 // ---------------------------------------------------------------------------
91
92 // Default constructor
93 wxDC::wxDC()
94 {
95 m_canvas = NULL;
96
97 m_oldBitmap = 0;
98 m_oldPen = 0;
99 m_oldBrush = 0;
100 m_oldFont = 0;
101 m_oldPalette = 0;
102
103 m_bOwnsDC = FALSE;
104 m_hDC = 0;
105
106 m_windowExtX = VIEWPORT_EXTENT;
107 m_windowExtY = VIEWPORT_EXTENT;
108
109 m_hDCCount = 0;
110 }
111
112
113 wxDC::~wxDC()
114 {
115 if ( m_hDC != 0 ) {
116 SelectOldObjects(m_hDC);
117 if ( m_bOwnsDC ) {
118 if ( m_canvas == NULL )
119 ::DeleteDC(GetHdc());
120 else
121 ::ReleaseDC((HWND)m_canvas->GetHWND(), GetHdc());
122 }
123 }
124
125 }
126
127 // This will select current objects out of the DC,
128 // which is what you have to do before deleting the
129 // DC.
130 void wxDC::SelectOldObjects(WXHDC dc)
131 {
132 if (dc)
133 {
134 if (m_oldBitmap)
135 {
136 ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
137 if (m_selectedBitmap.Ok())
138 {
139 m_selectedBitmap.SetSelectedInto(NULL);
140 }
141 }
142 m_oldBitmap = 0;
143 if (m_oldPen)
144 {
145 ::SelectObject((HDC) dc, (HPEN) m_oldPen);
146 }
147 m_oldPen = 0;
148 if (m_oldBrush)
149 {
150 ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
151 }
152 m_oldBrush = 0;
153 if (m_oldFont)
154 {
155 ::SelectObject((HDC) dc, (HFONT) m_oldFont);
156 }
157 m_oldFont = 0;
158 if (m_oldPalette)
159 {
160 ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE);
161 }
162 m_oldPalette = 0;
163 }
164
165 m_brush = wxNullBrush;
166 m_pen = wxNullPen;
167 m_palette = wxNullPalette;
168 m_font = wxNullFont;
169 m_backgroundBrush = wxNullBrush;
170 m_selectedBitmap = wxNullBitmap;
171 }
172
173 // ---------------------------------------------------------------------------
174 // clipping
175 // ---------------------------------------------------------------------------
176
177 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
178 {
179 m_clipping = TRUE;
180 m_clipX1 = (int)cx;
181 m_clipY1 = (int)cy;
182 m_clipX2 = (int)(cx + cw);
183 m_clipY2 = (int)(cy + ch);
184
185 DoClipping((WXHDC) m_hDC);
186 }
187
188 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
189 {
190 wxCHECK_RET( region.GetHRGN(), wxT("invalid clipping region") );
191
192 wxRect box = region.GetBox();
193
194 m_clipping = TRUE;
195 m_clipX1 = box.x;
196 m_clipY1 = box.y;
197 m_clipX2 = box.x + box.width;
198 m_clipY2 = box.y + box.height;
199
200 #ifdef __WIN16__
201 SelectClipRgn(GetHdc(), (HRGN) region.GetHRGN());
202 #else
203 ExtSelectClipRgn(GetHdc(), (HRGN) region.GetHRGN(), RGN_AND);
204 #endif
205 }
206
207 void wxDC::DoClipping(WXHDC dc)
208 {
209 if (m_clipping && dc)
210 {
211 IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1), YLOG2DEV(m_clipY1),
212 XLOG2DEV(m_clipX2), YLOG2DEV(m_clipY2));
213 }
214 }
215
216 void wxDC::DestroyClippingRegion()
217 {
218 if (m_clipping && m_hDC)
219 {
220 // TODO: this should restore the previous clipping region,
221 // so that OnPaint processing works correctly, and the update clipping region
222 // doesn't get destroyed after the first DestroyClippingRegion.
223 HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
224 SelectClipRgn(GetHdc(), rgn);
225 DeleteObject(rgn);
226 }
227 m_clipping = FALSE;
228 }
229
230 // ---------------------------------------------------------------------------
231 // query capabilities
232 // ---------------------------------------------------------------------------
233
234 bool wxDC::CanDrawBitmap() const
235 {
236 return TRUE;
237 }
238
239 bool wxDC::CanGetTextExtent() const
240 {
241 // What sort of display is it?
242 int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
243
244 return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
245 }
246
247 int wxDC::GetDepth() const
248 {
249 return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
250 }
251
252 // ---------------------------------------------------------------------------
253 // drawing
254 // ---------------------------------------------------------------------------
255
256 void wxDC::Clear()
257 {
258 RECT rect;
259 if ( m_canvas )
260 {
261 GetClientRect((HWND) m_canvas->GetHWND(), &rect);
262 }
263 else
264 {
265 wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") );
266
267 rect.left = 0; rect.top = 0;
268 rect.right = m_selectedBitmap.GetWidth();
269 rect.bottom = m_selectedBitmap.GetHeight();
270 }
271
272 (void) ::SetMapMode(GetHdc(), MM_TEXT);
273
274 DWORD colour = GetBkColor(GetHdc());
275 HBRUSH brush = CreateSolidBrush(colour);
276 FillRect(GetHdc(), &rect, brush);
277 DeleteObject(brush);
278
279 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
280 ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
281 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
282 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
283 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
284 }
285
286 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
287 {
288 (void)ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
289 col.GetPixel(),
290 style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
291 : FLOODFILLBORDER);
292
293 CalcBoundingBox(x, y);
294 }
295
296 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
297 {
298 // added by steve 29.12.94 (copied from DrawPoint)
299 // returns TRUE for pixels in the color of the current pen
300 // and FALSE for all other pixels colors
301 // if col is non-NULL return the color of the pixel
302
303 // get the color of the pixel
304 COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
305 // get the color of the pen
306 COLORREF pencolor = 0x00ffffff;
307 if (m_pen.Ok())
308 {
309 pencolor = m_pen.GetColour().GetPixel();
310 }
311
312 // return the color of the pixel
313 if(col)
314 col->Set(GetRValue(pixelcolor),GetGValue(pixelcolor),GetBValue(pixelcolor));
315
316 // check, if color of the pixels is the same as the color
317 // of the current pen
318 return(pixelcolor==pencolor);
319 }
320
321 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
322 {
323 wxCoord x1 = x-VIEWPORT_EXTENT;
324 wxCoord y1 = y-VIEWPORT_EXTENT;
325 wxCoord x2 = x+VIEWPORT_EXTENT;
326 wxCoord y2 = y+VIEWPORT_EXTENT;
327
328 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
329 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
330
331 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
332 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
333
334 CalcBoundingBox(x1, y1);
335 CalcBoundingBox(x2, y2);
336 }
337
338 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
339 {
340 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
341 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
342
343 /* MATTHEW: [6] New normalization */
344 #if WX_STANDARD_GRAPHICS
345 (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
346 #endif
347
348 CalcBoundingBox(x1, y1);
349 CalcBoundingBox(x2, y2);
350 }
351
352 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
353 {
354 double dx = xc-x1;
355 double dy = yc-y1;
356 double radius = (double)sqrt(dx*dx+dy*dy) ;;
357 if (x1==x2 && x2==y2)
358 {
359 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
360 return;
361 }
362
363 wxCoord xx1 = XLOG2DEV(x1);
364 wxCoord yy1 = YLOG2DEV(y1);
365 wxCoord xx2 = XLOG2DEV(x2);
366 wxCoord yy2 = YLOG2DEV(y2);
367 wxCoord xxc = XLOG2DEV(xc);
368 wxCoord yyc = YLOG2DEV(yc);
369 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
370
371 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
372 wxCoord xxx1 = (wxCoord) (xxc-ray);
373 wxCoord yyy1 = (wxCoord) (yyc-ray);
374 wxCoord xxx2 = (wxCoord) (xxc+ray);
375 wxCoord yyy2 = (wxCoord) (yyc+ray);
376 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
377 {
378 // Have to add 1 to bottom-right corner of rectangle
379 // to make semi-circles look right (crooked line otherwise).
380 // Unfortunately this is not a reliable method, depends
381 // on the size of shape.
382 // TODO: figure out why this happens!
383 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
384 xx1,yy1,xx2,yy2);
385 }
386 else
387 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
388 xx1,yy1,xx2,yy2);
389
390 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
391 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
392 }
393
394 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
395 {
396 COLORREF color = 0x00ffffff;
397 if (m_pen.Ok())
398 {
399 color = m_pen.GetColour().GetPixel();
400 }
401
402 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
403
404 CalcBoundingBox(x, y);
405 }
406
407 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
408 {
409 // Do things less efficiently if we have offsets
410 if (xoffset != 0 || yoffset != 0)
411 {
412 POINT *cpoints = new POINT[n];
413 int i;
414 for (i = 0; i < n; i++)
415 {
416 cpoints[i].x = (int)(points[i].x + xoffset);
417 cpoints[i].y = (int)(points[i].y + yoffset);
418
419 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
420 }
421 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
422 (void)Polygon(GetHdc(), cpoints, n);
423 SetPolyFillMode(GetHdc(),prev);
424 delete[] cpoints;
425 }
426 else
427 {
428 int i;
429 for (i = 0; i < n; i++)
430 CalcBoundingBox(points[i].x, points[i].y);
431
432 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
433 (void)Polygon(GetHdc(), (POINT*) points, n);
434 SetPolyFillMode(GetHdc(),prev);
435 }
436 }
437
438 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
439 {
440 // Do things less efficiently if we have offsets
441 if (xoffset != 0 || yoffset != 0)
442 {
443 POINT *cpoints = new POINT[n];
444 int i;
445 for (i = 0; i < n; i++)
446 {
447 cpoints[i].x = (int)(points[i].x + xoffset);
448 cpoints[i].y = (int)(points[i].y + yoffset);
449
450 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
451 }
452 (void)Polyline(GetHdc(), cpoints, n);
453 delete[] cpoints;
454 }
455 else
456 {
457 int i;
458 for (i = 0; i < n; i++)
459 CalcBoundingBox(points[i].x, points[i].y);
460
461 (void)Polyline(GetHdc(), (POINT*) points, n);
462 }
463 }
464
465 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
466 {
467 wxCoord x2 = x + width;
468 wxCoord y2 = y + height;
469
470 /* MATTHEW: [6] new normalization */
471 #if WX_STANDARD_GRAPHICS
472 bool do_brush, do_pen;
473
474 do_brush = m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT;
475 do_pen = m_pen.Ok() && m_pen.GetStyle() != wxTRANSPARENT;
476
477 if (do_brush) {
478 HPEN orig_pen = NULL;
479
480 if (do_pen || !m_pen.Ok())
481 orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
482
483 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
484 XLOG2DEV(x2) + 1, YLOG2DEV(y2) + 1);
485
486 if (do_pen || !m_pen.Ok())
487 ::SelectObject(GetHdc() , orig_pen);
488 }
489 if (do_pen) {
490 HBRUSH orig_brush = NULL;
491
492 if (do_brush || !m_brush.Ok())
493 orig_brush = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH) ::GetStockObject(NULL_BRUSH));
494
495 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
496 XLOG2DEV(x2), YLOG2DEV(y2));
497
498 if (do_brush || !m_brush.Ok())
499 ::SelectObject(GetHdc(), orig_brush);
500 }
501 #else
502 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
503 #endif
504
505 CalcBoundingBox(x, y);
506 CalcBoundingBox(x2, y2);
507 }
508
509 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
510 {
511 // Now, a negative radius value is interpreted to mean
512 // 'the proportion of the smallest X or Y dimension'
513
514 if (radius < 0.0)
515 {
516 double smallest = 0.0;
517 if (width < height)
518 smallest = width;
519 else
520 smallest = height;
521 radius = (- radius * smallest);
522 }
523
524 wxCoord x2 = (x+width);
525 wxCoord y2 = (y+height);
526
527 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
528 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
529
530 CalcBoundingBox(x, y);
531 CalcBoundingBox(x2, y2);
532 }
533
534 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
535 {
536 wxCoord x2 = (x+width);
537 wxCoord y2 = (y+height);
538
539 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
540
541 CalcBoundingBox(x, y);
542 CalcBoundingBox(x2, y2);
543 }
544
545 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
546 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
547 {
548 wxCoord x2 = (x+w);
549 wxCoord y2 = (y+h);
550
551 int rx1 = XLOG2DEV(x+w/2);
552 int ry1 = YLOG2DEV(y+h/2);
553 int rx2 = rx1;
554 int ry2 = ry1;
555
556 sa = DegToRad(sa);
557 ea = DegToRad(ea);
558
559 rx1 += (int)(100.0 * abs(w) * cos(sa));
560 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
561 rx2 += (int)(100.0 * abs(w) * cos(ea));
562 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
563
564 // draw pie with NULL_PEN first and then outline otherwise a line is
565 // drawn from the start and end points to the centre
566 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
567 if (m_signY > 0)
568 {
569 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
570 rx1, ry1, rx2, ry2);
571 }
572 else
573 {
574 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
575 rx1, ry1-1, rx2, ry2-1);
576 }
577 ::SelectObject(GetHdc(), orig_pen);
578 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
579 rx1, ry1, rx2, ry2);
580
581 CalcBoundingBox(x, y);
582 CalcBoundingBox(x2, y2);
583 }
584
585 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
586 {
587 #if defined(__WIN32__) && !defined(__SC__) && !defined(__TWIN32__)
588 ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON(),
589 icon.GetWidth(), icon.GetHeight(), 0, 0, DI_NORMAL);
590 #else
591 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON());
592 #endif
593
594 CalcBoundingBox(x, y);
595 CalcBoundingBox(x+icon.GetWidth(), y+icon.GetHeight());
596 }
597
598 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
599 {
600 if (!bmp.Ok())
601 return;
602
603 bool needsPixelCopy = false ;
604 bool isPrinter = false ;
605 if (IsKindOf(CLASSINFO(wxPrinterDC)) )
606 {
607 isPrinter = true ;
608 if ( ::GetDeviceCaps((HDC) m_hDC, RASTERCAPS) & RC_STRETCHDIB )
609 {
610 }
611 else
612 {
613 needsPixelCopy = true ;
614 }
615 }
616 // If we're not drawing transparently, and not drawing to a printer,
617 // optimize this function to use Windows functions.
618 if (!useMask && !needsPixelCopy)
619 {
620 if ( isPrinter )
621 {
622 BITMAPINFO *info = (BITMAPINFO *) malloc( sizeof( BITMAPINFOHEADER ) + 256 * sizeof(RGBQUAD ) ) ;
623 int iBitsSize = ((bmp.GetWidth() + 3 ) & ~3 ) * bmp.GetHeight() ;
624
625 void* bits = malloc( iBitsSize ) ;
626
627 memset( info , 0 , sizeof( BITMAPINFOHEADER ) ) ;
628
629 info->bmiHeader.biSize = sizeof( BITMAPINFOHEADER ) ;
630 info->bmiHeader.biWidth = bmp.GetWidth() ;
631 info->bmiHeader.biHeight = bmp.GetHeight() ;
632 info->bmiHeader.biPlanes = 1 ;
633 info->bmiHeader.biBitCount = 8 ;
634 info->bmiHeader.biCompression = BI_RGB ;
635
636 HDC display = GetDC( NULL ) ;
637 if ( GetDIBits( display , (HBITMAP) bmp.GetHBITMAP( ) , 0 , bmp.GetHeight() , bits , info , DIB_RGB_COLORS ) )
638 {
639 StretchDIBits( (HDC) m_hDC,
640 x, y, bmp.GetWidth(), bmp.GetHeight() ,
641 0 , 0 ,bmp.GetWidth(), bmp.GetHeight() ,
642 bits , info , DIB_RGB_COLORS , SRCCOPY ) ;
643 }
644 ReleaseDC( NULL , display ) ;
645 free ( bits ) ;
646 free( info ) ;
647 }
648 else
649 {
650 HDC cdc = GetHdc();
651 HDC memdc = ::CreateCompatibleDC( cdc );
652 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
653
654 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
655
656 ::SelectObject( memdc, hbitmap );
657 ::BitBlt( cdc, x, y, bmp.GetWidth(), bmp.GetHeight(), memdc, 0, 0, SRCCOPY);
658 ::DeleteDC( memdc );
659 }
660 }
661 else
662 {
663 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API level
664 wxMemoryDC memDC;
665 memDC.SelectObject(bmp);
666
667 /* Not sure if we need this. The mask should leave the
668 * masked areas as per the original background of this DC.
669 */
670 /*
671 // There might be transparent areas, so make these
672 // the same colour as this DC
673 memDC.SetBackground(* GetBackground());
674 memDC.Clear();
675 */
676
677 Blit(x, y, bmp.GetWidth(), bmp.GetHeight(), & memDC, 0, 0, wxCOPY, useMask);
678
679 memDC.SelectObject(wxNullBitmap);
680 }
681 }
682
683 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
684 {
685 DrawAnyText(text, x, y);
686
687 // update the bounding box
688 CalcBoundingBox(x, y);
689
690 wxCoord w, h;
691 GetTextExtent(text, &w, &h);
692 CalcBoundingBox(x + w, y + h);
693 }
694
695 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
696 {
697 // prepare for drawing the text
698 if ( m_textForegroundColour.Ok() )
699 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
700
701 DWORD old_background = 0;
702 if ( m_textBackgroundColour.Ok() )
703 {
704 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
705 }
706
707 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
708 : OPAQUE);
709
710 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
711 text.c_str(), text.length()) == 0 )
712 {
713 wxLogLastError("TextOut");
714 }
715
716 // restore the old parameters (text foreground colour may be left because
717 // it never is set to anything else, but background should remain
718 // transparent even if we just drew an opaque string)
719 if ( m_textBackgroundColour.Ok() )
720 (void)SetBkColor(GetHdc(), old_background);
721
722 SetBkMode(GetHdc(), TRANSPARENT);
723 }
724
725 void wxDC::DoDrawRotatedText(const wxString& text,
726 wxCoord x, wxCoord y,
727 double angle)
728 {
729 // we test that we have some font because otherwise we should still use the
730 // "else" part below to avoid that DrawRotatedText(angle = 180) and
731 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
732 // font for drawing rotated fonts unfortunately)
733 if ( (angle == 0.0) && m_font.Ok() )
734 {
735 DoDrawText(text, x, y);
736 }
737 else
738 {
739 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
740 // can't have non zero orientation/escapement
741 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
742 HFONT hfont = (HFONT)font.GetResourceHandle();
743 LOGFONT lf;
744 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
745 {
746 wxLogLastError("GetObject(hfont)");
747 }
748
749 // GDI wants the angle in tenth of degree
750 long angle10 = (long)(angle * 10);
751 lf.lfEscapement = angle10;
752 lf. lfOrientation = angle10;
753
754 hfont = ::CreateFontIndirect(&lf);
755 if ( !hfont )
756 {
757 wxLogLastError("CreateFont");
758 }
759 else
760 {
761 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
762
763 DrawAnyText(text, x, y);
764
765 (void)::SelectObject(GetHdc(), hfontOld);
766 }
767
768 // call the bounding box by adding all four vertices of the rectangle
769 // containing the text to it (simpler and probably not slower than
770 // determining which of them is really topmost/leftmost/...)
771 wxCoord w, h;
772 GetTextExtent(text, &w, &h);
773
774 double rad = DegToRad(angle);
775
776 // "upper left" and "upper right"
777 CalcBoundingBox(x, y);
778 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
779
780 // "bottom left" and "bottom right"
781 x += (wxCoord)(h*sin(rad));
782 y += (wxCoord)(h*cos(rad));
783 CalcBoundingBox(x, y);
784 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
785 }
786 }
787
788 // ---------------------------------------------------------------------------
789 // set GDI objects
790 // ---------------------------------------------------------------------------
791
792 void wxDC::SetPalette(const wxPalette& palette)
793 {
794 // Set the old object temporarily, in case the assignment deletes an object
795 // that's not yet selected out.
796 if (m_oldPalette)
797 {
798 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
799 m_oldPalette = 0;
800 }
801
802 m_palette = palette;
803
804 if (!m_palette.Ok())
805 {
806 // Setting a NULL colourmap is a way of restoring
807 // the original colourmap
808 if (m_oldPalette)
809 {
810 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
811 m_oldPalette = 0;
812 }
813
814 return;
815 }
816
817 if (m_palette.Ok() && m_palette.GetHPALETTE())
818 {
819 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
820 if (!m_oldPalette)
821 m_oldPalette = (WXHPALETTE) oldPal;
822
823 ::RealizePalette(GetHdc());
824 }
825 }
826
827 void wxDC::SetFont(const wxFont& the_font)
828 {
829 // Set the old object temporarily, in case the assignment deletes an object
830 // that's not yet selected out.
831 if (m_oldFont)
832 {
833 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
834 m_oldFont = 0;
835 }
836
837 m_font = the_font;
838
839 if (!the_font.Ok())
840 {
841 if (m_oldFont)
842 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
843 m_oldFont = 0;
844 }
845
846 if (m_font.Ok() && m_font.GetResourceHandle())
847 {
848 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
849 if (f == (HFONT) NULL)
850 {
851 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
852 }
853 if (!m_oldFont)
854 m_oldFont = (WXHFONT) f;
855 }
856 }
857
858 void wxDC::SetPen(const wxPen& pen)
859 {
860 // Set the old object temporarily, in case the assignment deletes an object
861 // that's not yet selected out.
862 if (m_oldPen)
863 {
864 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
865 m_oldPen = 0;
866 }
867
868 m_pen = pen;
869
870 if (!m_pen.Ok())
871 {
872 if (m_oldPen)
873 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
874 m_oldPen = 0;
875 }
876
877 if (m_pen.Ok())
878 {
879 if (m_pen.GetResourceHandle())
880 {
881 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
882 if (!m_oldPen)
883 m_oldPen = (WXHPEN) p;
884 }
885 }
886 }
887
888 void wxDC::SetBrush(const wxBrush& brush)
889 {
890 // Set the old object temporarily, in case the assignment deletes an object
891 // that's not yet selected out.
892 if (m_oldBrush)
893 {
894 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
895 m_oldBrush = 0;
896 }
897
898 m_brush = brush;
899
900 if (!m_brush.Ok())
901 {
902 if (m_oldBrush)
903 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
904 m_oldBrush = 0;
905 }
906
907 if (m_brush.Ok())
908 {
909 if (m_brush.GetResourceHandle())
910 {
911 HBRUSH b = 0;
912 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
913 if (!m_oldBrush)
914 m_oldBrush = (WXHBRUSH) b;
915 }
916 }
917 }
918
919 void wxDC::SetBackground(const wxBrush& brush)
920 {
921 m_backgroundBrush = brush;
922
923 if (!m_backgroundBrush.Ok())
924 return;
925
926 if (m_canvas)
927 {
928 bool customColours = TRUE;
929 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
930 // change background colours from the control-panel specified colours.
931 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
932 customColours = FALSE;
933
934 if (customColours)
935 {
936 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
937 {
938 m_canvas->SetTransparent(TRUE);
939 }
940 else
941 {
942 // New behaviour, 10/2/99: setting the background brush of a DC
943 // doesn't affect the window background colour. However,
944 // I'm leaving in the transparency setting because it's needed by
945 // various controls (e.g. wxStaticText) to determine whether to draw
946 // transparently or not. TODO: maybe this should be a new function
947 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
948 // parent?
949 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
950 m_canvas->SetTransparent(FALSE);
951 }
952 }
953 }
954 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
955 {
956 (void)SetBkColor(GetHdc(), new_color);
957 }
958 }
959
960 void wxDC::SetBackgroundMode(int mode)
961 {
962 m_backgroundMode = mode;
963
964 // SetBackgroundColour now only refers to text background
965 // and m_backgroundMode is used there
966
967 /*
968 if (m_backgroundMode == wxTRANSPARENT)
969 ::SetBkMode(GetHdc(), TRANSPARENT);
970 else
971 ::SetBkMode(GetHdc(), OPAQUE);
972 */
973 }
974
975 void wxDC::SetLogicalFunction(int function)
976 {
977 m_logicalFunction = function;
978
979 SetRop((WXHDC) m_hDC);
980 }
981
982 void wxDC::SetRop(WXHDC dc)
983 {
984 if (!dc || m_logicalFunction < 0)
985 return;
986
987 int c_rop;
988 // These may be wrong
989 switch (m_logicalFunction)
990 {
991 // case wxXOR: c_rop = R2_XORPEN; break;
992 case wxXOR: c_rop = R2_NOTXORPEN; break;
993 case wxINVERT: c_rop = R2_NOT; break;
994 case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break;
995 case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break;
996 case wxCLEAR: c_rop = R2_WHITE; break;
997 case wxSET: c_rop = R2_BLACK; break;
998 case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break;
999 case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break;
1000 case wxAND: c_rop = R2_MASKPEN; break;
1001 case wxOR: c_rop = R2_MERGEPEN; break;
1002 case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break;
1003 case wxEQUIV:
1004 case wxNAND:
1005 case wxCOPY:
1006 default:
1007 c_rop = R2_COPYPEN; break;
1008 }
1009 SetROP2((HDC) dc, c_rop);
1010 }
1011
1012 bool wxDC::StartDoc(const wxString& message)
1013 {
1014 // We might be previewing, so return TRUE to let it continue.
1015 return TRUE;
1016 }
1017
1018 void wxDC::EndDoc()
1019 {
1020 }
1021
1022 void wxDC::StartPage()
1023 {
1024 }
1025
1026 void wxDC::EndPage()
1027 {
1028 }
1029
1030 // ---------------------------------------------------------------------------
1031 // text metrics
1032 // ---------------------------------------------------------------------------
1033
1034 wxCoord wxDC::GetCharHeight() const
1035 {
1036 TEXTMETRIC lpTextMetric;
1037
1038 GetTextMetrics(GetHdc(), &lpTextMetric);
1039
1040 return YDEV2LOGREL(lpTextMetric.tmHeight);
1041 }
1042
1043 wxCoord wxDC::GetCharWidth() const
1044 {
1045 TEXTMETRIC lpTextMetric;
1046
1047 GetTextMetrics(GetHdc(), &lpTextMetric);
1048
1049 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1050 }
1051
1052 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1053 wxCoord *descent, wxCoord *externalLeading,
1054 wxFont *theFont) const
1055 {
1056 wxFont *fontToUse = (wxFont*) theFont;
1057 if (!fontToUse)
1058 fontToUse = (wxFont*) &m_font;
1059
1060 SIZE sizeRect;
1061 TEXTMETRIC tm;
1062
1063 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1064 GetTextMetrics(GetHdc(), &tm);
1065
1066 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1067 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1068 if (descent) *descent = tm.tmDescent;
1069 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1070 }
1071
1072 void wxDC::SetMapMode(int mode)
1073 {
1074 m_mappingMode = mode;
1075
1076 int pixel_width = 0;
1077 int pixel_height = 0;
1078 int mm_width = 0;
1079 int mm_height = 0;
1080
1081 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1082 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1083 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1084 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1085
1086 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1087 {
1088 return;
1089 }
1090
1091 double mm2pixelsX = pixel_width/mm_width;
1092 double mm2pixelsY = pixel_height/mm_height;
1093
1094 switch (mode)
1095 {
1096 case wxMM_TWIPS:
1097 {
1098 m_logicalScaleX = (twips2mm * mm2pixelsX);
1099 m_logicalScaleY = (twips2mm * mm2pixelsY);
1100 break;
1101 }
1102 case wxMM_POINTS:
1103 {
1104 m_logicalScaleX = (pt2mm * mm2pixelsX);
1105 m_logicalScaleY = (pt2mm * mm2pixelsY);
1106 break;
1107 }
1108 case wxMM_METRIC:
1109 {
1110 m_logicalScaleX = mm2pixelsX;
1111 m_logicalScaleY = mm2pixelsY;
1112 break;
1113 }
1114 case wxMM_LOMETRIC:
1115 {
1116 m_logicalScaleX = (mm2pixelsX/10.0);
1117 m_logicalScaleY = (mm2pixelsY/10.0);
1118 break;
1119 }
1120 default:
1121 case wxMM_TEXT:
1122 {
1123 m_logicalScaleX = 1.0;
1124 m_logicalScaleY = 1.0;
1125 break;
1126 }
1127 }
1128
1129 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1130 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1131
1132 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1133 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1134 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1135 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1136 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1137 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1138 }
1139
1140 void wxDC::SetUserScale(double x, double y)
1141 {
1142 m_userScaleX = x;
1143 m_userScaleY = y;
1144
1145 SetMapMode(m_mappingMode);
1146 }
1147
1148 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1149 {
1150 m_signX = xLeftRight ? 1 : -1;
1151 m_signY = yBottomUp ? -1 : 1;
1152
1153 SetMapMode(m_mappingMode);
1154 }
1155
1156 void wxDC::SetSystemScale(double x, double y)
1157 {
1158 m_scaleX = x;
1159 m_scaleY = y;
1160
1161 SetMapMode(m_mappingMode);
1162 }
1163
1164 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1165 {
1166 m_logicalOriginX = x;
1167 m_logicalOriginY = y;
1168
1169 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1170 }
1171
1172 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1173 {
1174 m_deviceOriginX = x;
1175 m_deviceOriginY = y;
1176
1177 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1178 }
1179
1180 // ---------------------------------------------------------------------------
1181 // coordinates transformations
1182 // ---------------------------------------------------------------------------
1183
1184 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1185 {
1186 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1187 }
1188
1189 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1190 {
1191 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1192 }
1193
1194 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1195 {
1196 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1197 }
1198
1199 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1200 {
1201 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1202 }
1203
1204 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1205 {
1206 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1207 }
1208
1209 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1210 {
1211 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1212 }
1213
1214 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1215 {
1216 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1217 }
1218
1219 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1220 {
1221 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1222 }
1223
1224 // ---------------------------------------------------------------------------
1225 // bit blit
1226 // ---------------------------------------------------------------------------
1227 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
1228 wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop, bool useMask)
1229 {
1230 wxCoord xdest1 = xdest;
1231 wxCoord ydest1 = ydest;
1232 wxCoord xsrc1 = xsrc;
1233 wxCoord ysrc1 = ysrc;
1234
1235 // Chris Breeze 18/5/98: use text foreground/background colours
1236 // when blitting from 1-bit bitmaps
1237 COLORREF old_textground = ::GetTextColor(GetHdc());
1238 COLORREF old_background = ::GetBkColor(GetHdc());
1239 if (m_textForegroundColour.Ok())
1240 {
1241 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1242 }
1243 if (m_textBackgroundColour.Ok())
1244 {
1245 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1246 }
1247
1248 DWORD dwRop = rop == wxCOPY ? SRCCOPY :
1249 rop == wxCLEAR ? WHITENESS :
1250 rop == wxSET ? BLACKNESS :
1251 rop == wxINVERT ? DSTINVERT :
1252 rop == wxAND ? MERGECOPY :
1253 rop == wxOR ? MERGEPAINT :
1254 rop == wxSRC_INVERT ? NOTSRCCOPY :
1255 rop == wxXOR ? SRCINVERT :
1256 rop == wxOR_REVERSE ? MERGEPAINT :
1257 rop == wxAND_REVERSE ? SRCERASE :
1258 rop == wxSRC_OR ? SRCPAINT :
1259 rop == wxSRC_AND ? SRCAND :
1260 SRCCOPY;
1261
1262 bool success = TRUE;
1263 if (useMask && source->m_selectedBitmap.Ok() && source->m_selectedBitmap.GetMask())
1264 {
1265
1266 #if 0 // __WIN32__
1267 // Not implemented under Win95 (or maybe a specific device?)
1268 if (MaskBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1269 (HDC) source->m_hDC, xsrc1, ysrc1, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap(),
1270 0, 0, 0xAACC0020))
1271 {
1272 // Success
1273 }
1274 else
1275 #endif
1276 {
1277 // New code from Chris Breeze, 15/7/98
1278 // Blit bitmap with mask
1279
1280 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1281 {
1282 // If we are printing source colours are screen colours
1283 // not printer colours and so we need copy the bitmap
1284 // pixel by pixel.
1285 RECT rect;
1286 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1287 HDC dc_src = (HDC) source->m_hDC;
1288
1289 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1290 for (int x = 0; x < width; x++)
1291 {
1292 for (int y = 0; y < height; y++)
1293 {
1294 COLORREF cref = ::GetPixel(dc_mask, x, y);
1295 if (cref)
1296 {
1297 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1298 rect.left = xdest1 + x; rect.right = rect.left + 1;
1299 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1300 ::FillRect(GetHdc(), &rect, brush);
1301 ::DeleteObject(brush);
1302 }
1303 }
1304 }
1305 ::SelectObject(dc_mask, 0);
1306 ::DeleteDC(dc_mask);
1307 }
1308 else
1309 {
1310 // create a temp buffer bitmap and DCs to access it and the mask
1311 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1312 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1313 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1314 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1315 ::SelectObject(dc_buffer, buffer_bmap);
1316
1317 // copy dest to buffer
1318 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1319 GetHdc(), xdest1, ydest1, SRCCOPY);
1320
1321 // copy src to buffer using selected raster op
1322 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1323 (HDC) source->m_hDC, xsrc1, ysrc1, dwRop);
1324
1325 // set masked area in buffer to BLACK (pixel value 0)
1326 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1327 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1328 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1329 dc_mask, xsrc1, ysrc1, SRCAND);
1330
1331 // set unmasked area in dest to BLACK
1332 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1333 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1334 ::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1335 dc_mask, xsrc1, ysrc1, SRCAND);
1336 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1337 ::SetTextColor(GetHdc(), prevCol);
1338
1339 // OR buffer to dest
1340 success = (::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1341 dc_buffer, 0, 0, SRCPAINT) != 0);
1342
1343 // tidy up temporary DCs and bitmap
1344 ::SelectObject(dc_mask, 0);
1345 ::DeleteDC(dc_mask);
1346 ::SelectObject(dc_buffer, 0);
1347 ::DeleteDC(dc_buffer);
1348 ::DeleteObject(buffer_bmap);
1349 }
1350 }
1351 }
1352 else
1353 {
1354 // If we are printing, source colours are screen colours
1355 // not printer colours and so we need copy the bitmap
1356 // pixel by pixel.
1357 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1358 {
1359 HDC dc_src = (HDC) source->m_hDC;
1360 RECT rect;
1361 for (int y = 0; y < height; y++)
1362 {
1363 // This is Stefan Csomor's optimisation, where
1364 // identical adjacent pixels are drawn together.
1365 // We still need a faster way of drawing bitmaps,
1366 // perhaps converting to a DIB first and using SetDIBitsToDevice.
1367 for (int x = 0; x < width; x++)
1368 {
1369 COLORREF col = ::GetPixel(dc_src, x, y) ;
1370 HBRUSH brush = ::CreateSolidBrush( col );
1371
1372 rect.left = xdest1 + x;
1373 rect.top = ydest1 + y;
1374 while( (x + 1 < width) && (::GetPixel(dc_src, x + 1, y) == col ) )
1375 {
1376 ++x ;
1377 }
1378 rect.right = xdest1 + x + 1;
1379 rect.bottom = rect.top + 1;
1380 ::FillRect((HDC) m_hDC, &rect, brush);
1381 ::DeleteObject(brush);
1382 }
1383 }
1384 /*
1385 HDC dc_src = (HDC) source->m_hDC;
1386 RECT rect;
1387 for (int x = 0; x < width; x++)
1388 {
1389 for (int y = 0; y < height; y++)
1390 {
1391 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1392 rect.left = xdest1 + x; rect.right = rect.left + 1;
1393 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1394 ::FillRect(GetHdc(), &rect, brush);
1395 ::DeleteObject(brush);
1396 }
1397 }
1398 */
1399 }
1400 else
1401 {
1402 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height, (HDC) source->m_hDC,
1403 xsrc1, ysrc1, dwRop) != 0);
1404 }
1405 }
1406 ::SetTextColor(GetHdc(), old_textground);
1407 ::SetBkColor(GetHdc(), old_background);
1408
1409 return success;
1410 }
1411
1412 void wxDC::DoGetSize(int *w, int *h) const
1413 {
1414 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1415 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1416 }
1417
1418 void wxDC::DoGetSizeMM(int *w, int *h) const
1419 {
1420 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1421 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1422 }
1423
1424 wxSize wxDC::GetPPI() const
1425 {
1426 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1427 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1428
1429 return wxSize(x, y);
1430 }
1431
1432 // For use by wxWindows only, unless custom units are required.
1433 void wxDC::SetLogicalScale(double x, double y)
1434 {
1435 m_logicalScaleX = x;
1436 m_logicalScaleY = y;
1437 }
1438
1439 #if WXWIN_COMPATIBILITY
1440 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1441 float *descent, float *externalLeading,
1442 wxFont *theFont, bool use16bit) const
1443 {
1444 wxCoord x1, y1, descent1, externalLeading1;
1445 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1446 *x = x1; *y = y1;
1447 if (descent)
1448 *descent = descent1;
1449 if (externalLeading)
1450 *externalLeading = externalLeading1;
1451 }
1452 #endif
1453
1454 // ---------------------------------------------------------------------------
1455 // spline drawing code
1456 // ---------------------------------------------------------------------------
1457
1458 #if wxUSE_SPLINES
1459
1460 class wxSpline: public wxObject
1461 {
1462 public:
1463 int type;
1464 wxList *points;
1465
1466 wxSpline(wxList *list);
1467 void DeletePoints();
1468
1469 // Doesn't delete points
1470 ~wxSpline();
1471 };
1472
1473 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1474
1475 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1476 double a3, double b3, double a4, double b4);
1477 void wx_clear_stack();
1478 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1479 double *y3, double *x4, double *y4);
1480 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1481 double x4, double y4);
1482 static bool wx_spline_add_point(double x, double y);
1483 static void wx_spline_draw_point_array(wxDC *dc);
1484 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1485
1486 void wxDC::DoDrawSpline(wxList *list)
1487 {
1488 wxSpline spline(list);
1489
1490 wx_draw_open_spline(this, &spline);
1491 }
1492
1493 wxList wx_spline_point_list;
1494
1495 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1496 {
1497 wxPoint *p;
1498 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1499 double x1, y1, x2, y2;
1500
1501 wxNode *node = spline->points->First();
1502 p = (wxPoint *)node->Data();
1503
1504 x1 = p->x;
1505 y1 = p->y;
1506
1507 node = node->Next();
1508 p = (wxPoint *)node->Data();
1509
1510 x2 = p->x;
1511 y2 = p->y;
1512 cx1 = (double)((x1 + x2) / 2);
1513 cy1 = (double)((y1 + y2) / 2);
1514 cx2 = (double)((cx1 + x2) / 2);
1515 cy2 = (double)((cy1 + y2) / 2);
1516
1517 wx_spline_add_point(x1, y1);
1518
1519 while ((node = node->Next()) != NULL)
1520 {
1521 p = (wxPoint *)node->Data();
1522 x1 = x2;
1523 y1 = y2;
1524 x2 = p->x;
1525 y2 = p->y;
1526 cx4 = (double)(x1 + x2) / 2;
1527 cy4 = (double)(y1 + y2) / 2;
1528 cx3 = (double)(x1 + cx4) / 2;
1529 cy3 = (double)(y1 + cy4) / 2;
1530
1531 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1532
1533 cx1 = cx4;
1534 cy1 = cy4;
1535 cx2 = (double)(cx1 + x2) / 2;
1536 cy2 = (double)(cy1 + y2) / 2;
1537 }
1538
1539 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1540 wx_spline_add_point(x2, y2);
1541
1542 wx_spline_draw_point_array(dc);
1543
1544 }
1545
1546 /********************* CURVES FOR SPLINES *****************************
1547
1548 The following spline drawing routine is from
1549
1550 "An Algorithm for High-Speed Curve Generation"
1551 by George Merrill Chaikin,
1552 Computer Graphics and Image Processing, 3, Academic Press,
1553 1974, 346-349.
1554
1555 and
1556
1557 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1558 Computer Graphics and Image Processing, 4, Academic Press,
1559 1975, 304-310.
1560
1561 ***********************************************************************/
1562
1563 #define half(z1, z2) ((z1+z2)/2.0)
1564 #define THRESHOLD 5
1565
1566 /* iterative version */
1567
1568 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1569 double b4)
1570 {
1571 register double xmid, ymid;
1572 double x1, y1, x2, y2, x3, y3, x4, y4;
1573
1574 wx_clear_stack();
1575 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1576
1577 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1578 xmid = (double)half(x2, x3);
1579 ymid = (double)half(y2, y3);
1580 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1581 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1582 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1583 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1584 } else {
1585 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1586 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1587 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1588 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1589 }
1590 }
1591 }
1592
1593
1594 /* utilities used by spline drawing routines */
1595
1596
1597 typedef struct wx_spline_stack_struct {
1598 double x1, y1, x2, y2, x3, y3, x4, y4;
1599 }
1600 Stack;
1601
1602 #define SPLINE_STACK_DEPTH 20
1603 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1604 static Stack *wx_stack_top;
1605 static int wx_stack_count;
1606
1607 void wx_clear_stack()
1608 {
1609 wx_stack_top = wx_spline_stack;
1610 wx_stack_count = 0;
1611 }
1612
1613 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1614 {
1615 wx_stack_top->x1 = x1;
1616 wx_stack_top->y1 = y1;
1617 wx_stack_top->x2 = x2;
1618 wx_stack_top->y2 = y2;
1619 wx_stack_top->x3 = x3;
1620 wx_stack_top->y3 = y3;
1621 wx_stack_top->x4 = x4;
1622 wx_stack_top->y4 = y4;
1623 wx_stack_top++;
1624 wx_stack_count++;
1625 }
1626
1627 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1628 double *x3, double *y3, double *x4, double *y4)
1629 {
1630 if (wx_stack_count == 0)
1631 return (0);
1632 wx_stack_top--;
1633 wx_stack_count--;
1634 *x1 = wx_stack_top->x1;
1635 *y1 = wx_stack_top->y1;
1636 *x2 = wx_stack_top->x2;
1637 *y2 = wx_stack_top->y2;
1638 *x3 = wx_stack_top->x3;
1639 *y3 = wx_stack_top->y3;
1640 *x4 = wx_stack_top->x4;
1641 *y4 = wx_stack_top->y4;
1642 return (1);
1643 }
1644
1645 static bool wx_spline_add_point(double x, double y)
1646 {
1647 wxPoint *point = new wxPoint;
1648 point->x = (int) x;
1649 point->y = (int) y;
1650 wx_spline_point_list.Append((wxObject*)point);
1651 return TRUE;
1652 }
1653
1654 static void wx_spline_draw_point_array(wxDC *dc)
1655 {
1656 dc->DrawLines(&wx_spline_point_list, 0, 0);
1657 wxNode *node = wx_spline_point_list.First();
1658 while (node)
1659 {
1660 wxPoint *point = (wxPoint *)node->Data();
1661 delete point;
1662 delete node;
1663 node = wx_spline_point_list.First();
1664 }
1665 }
1666
1667 wxSpline::wxSpline(wxList *list)
1668 {
1669 points = list;
1670 }
1671
1672 wxSpline::~wxSpline()
1673 {
1674 }
1675
1676 void wxSpline::DeletePoints()
1677 {
1678 for(wxNode *node = points->First(); node; node = points->First())
1679 {
1680 wxPoint *point = (wxPoint *)node->Data();
1681 delete point;
1682 delete node;
1683 }
1684 delete points;
1685 }
1686
1687
1688 #endif // wxUSE_SPLINES
1689
wxWidgets (Impactor)