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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 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 COLORREF old_textground = ::GetTextColor(GetHdc());
657 COLORREF old_background = ::GetBkColor(GetHdc());
658 if (m_textForegroundColour.Ok())
659 {
660 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
661 }
662 if (m_textBackgroundColour.Ok())
663 {
664 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
665 }
666
667 ::SelectObject( memdc, hbitmap );
668 ::BitBlt( cdc, x, y, bmp.GetWidth(), bmp.GetHeight(), memdc, 0, 0, SRCCOPY);
669 ::DeleteDC( memdc );
670
671 ::SetTextColor(GetHdc(), old_textground);
672 ::SetBkColor(GetHdc(), old_background);
673 }
674 }
675 else
676 {
677 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API level
678 wxMemoryDC memDC;
679 memDC.SelectObject(bmp);
680
681 /* Not sure if we need this. The mask should leave the
682 * masked areas as per the original background of this DC.
683 */
684 /*
685 // There might be transparent areas, so make these
686 // the same colour as this DC
687 memDC.SetBackground(* GetBackground());
688 memDC.Clear();
689 */
690
691 Blit(x, y, bmp.GetWidth(), bmp.GetHeight(), & memDC, 0, 0, wxCOPY, useMask);
692
693 memDC.SelectObject(wxNullBitmap);
694 }
695 }
696
697 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
698 {
699 DrawAnyText(text, x, y);
700
701 // update the bounding box
702 CalcBoundingBox(x, y);
703
704 wxCoord w, h;
705 GetTextExtent(text, &w, &h);
706 CalcBoundingBox(x + w, y + h);
707 }
708
709 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
710 {
711 // prepare for drawing the text
712 if ( m_textForegroundColour.Ok() )
713 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
714
715 DWORD old_background = 0;
716 if ( m_textBackgroundColour.Ok() )
717 {
718 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
719 }
720
721 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
722 : OPAQUE);
723
724 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
725 text.c_str(), text.length()) == 0 )
726 {
727 wxLogLastError("TextOut");
728 }
729
730 // restore the old parameters (text foreground colour may be left because
731 // it never is set to anything else, but background should remain
732 // transparent even if we just drew an opaque string)
733 if ( m_textBackgroundColour.Ok() )
734 (void)SetBkColor(GetHdc(), old_background);
735
736 SetBkMode(GetHdc(), TRANSPARENT);
737 }
738
739 void wxDC::DoDrawRotatedText(const wxString& text,
740 wxCoord x, wxCoord y,
741 double angle)
742 {
743 // we test that we have some font because otherwise we should still use the
744 // "else" part below to avoid that DrawRotatedText(angle = 180) and
745 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
746 // font for drawing rotated fonts unfortunately)
747 if ( (angle == 0.0) && m_font.Ok() )
748 {
749 DoDrawText(text, x, y);
750 }
751 else
752 {
753 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
754 // can't have non zero orientation/escapement
755 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
756 HFONT hfont = (HFONT)font.GetResourceHandle();
757 LOGFONT lf;
758 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
759 {
760 wxLogLastError("GetObject(hfont)");
761 }
762
763 // GDI wants the angle in tenth of degree
764 long angle10 = (long)(angle * 10);
765 lf.lfEscapement = angle10;
766 lf. lfOrientation = angle10;
767
768 hfont = ::CreateFontIndirect(&lf);
769 if ( !hfont )
770 {
771 wxLogLastError("CreateFont");
772 }
773 else
774 {
775 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
776
777 DrawAnyText(text, x, y);
778
779 (void)::SelectObject(GetHdc(), hfontOld);
780 }
781
782 // call the bounding box by adding all four vertices of the rectangle
783 // containing the text to it (simpler and probably not slower than
784 // determining which of them is really topmost/leftmost/...)
785 wxCoord w, h;
786 GetTextExtent(text, &w, &h);
787
788 double rad = DegToRad(angle);
789
790 // "upper left" and "upper right"
791 CalcBoundingBox(x, y);
792 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
793
794 // "bottom left" and "bottom right"
795 x += (wxCoord)(h*sin(rad));
796 y += (wxCoord)(h*cos(rad));
797 CalcBoundingBox(x, y);
798 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
799 }
800 }
801
802 // ---------------------------------------------------------------------------
803 // set GDI objects
804 // ---------------------------------------------------------------------------
805
806 void wxDC::SetPalette(const wxPalette& palette)
807 {
808 // Set the old object temporarily, in case the assignment deletes an object
809 // that's not yet selected out.
810 if (m_oldPalette)
811 {
812 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
813 m_oldPalette = 0;
814 }
815
816 m_palette = palette;
817
818 if (!m_palette.Ok())
819 {
820 // Setting a NULL colourmap is a way of restoring
821 // the original colourmap
822 if (m_oldPalette)
823 {
824 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
825 m_oldPalette = 0;
826 }
827
828 return;
829 }
830
831 if (m_palette.Ok() && m_palette.GetHPALETTE())
832 {
833 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
834 if (!m_oldPalette)
835 m_oldPalette = (WXHPALETTE) oldPal;
836
837 ::RealizePalette(GetHdc());
838 }
839 }
840
841 void wxDC::SetFont(const wxFont& the_font)
842 {
843 // Set the old object temporarily, in case the assignment deletes an object
844 // that's not yet selected out.
845 if (m_oldFont)
846 {
847 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
848 m_oldFont = 0;
849 }
850
851 m_font = the_font;
852
853 if (!the_font.Ok())
854 {
855 if (m_oldFont)
856 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
857 m_oldFont = 0;
858 }
859
860 if (m_font.Ok() && m_font.GetResourceHandle())
861 {
862 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
863 if (f == (HFONT) NULL)
864 {
865 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
866 }
867 if (!m_oldFont)
868 m_oldFont = (WXHFONT) f;
869 }
870 }
871
872 void wxDC::SetPen(const wxPen& pen)
873 {
874 // Set the old object temporarily, in case the assignment deletes an object
875 // that's not yet selected out.
876 if (m_oldPen)
877 {
878 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
879 m_oldPen = 0;
880 }
881
882 m_pen = pen;
883
884 if (!m_pen.Ok())
885 {
886 if (m_oldPen)
887 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
888 m_oldPen = 0;
889 }
890
891 if (m_pen.Ok())
892 {
893 if (m_pen.GetResourceHandle())
894 {
895 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
896 if (!m_oldPen)
897 m_oldPen = (WXHPEN) p;
898 }
899 }
900 }
901
902 void wxDC::SetBrush(const wxBrush& brush)
903 {
904 // Set the old object temporarily, in case the assignment deletes an object
905 // that's not yet selected out.
906 if (m_oldBrush)
907 {
908 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
909 m_oldBrush = 0;
910 }
911
912 m_brush = brush;
913
914 if (!m_brush.Ok())
915 {
916 if (m_oldBrush)
917 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
918 m_oldBrush = 0;
919 }
920
921 if (m_brush.Ok())
922 {
923 if (m_brush.GetResourceHandle())
924 {
925 HBRUSH b = 0;
926 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
927 if (!m_oldBrush)
928 m_oldBrush = (WXHBRUSH) b;
929 }
930 }
931 }
932
933 void wxDC::SetBackground(const wxBrush& brush)
934 {
935 m_backgroundBrush = brush;
936
937 if (!m_backgroundBrush.Ok())
938 return;
939
940 if (m_canvas)
941 {
942 bool customColours = TRUE;
943 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
944 // change background colours from the control-panel specified colours.
945 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
946 customColours = FALSE;
947
948 if (customColours)
949 {
950 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
951 {
952 m_canvas->SetTransparent(TRUE);
953 }
954 else
955 {
956 // New behaviour, 10/2/99: setting the background brush of a DC
957 // doesn't affect the window background colour. However,
958 // I'm leaving in the transparency setting because it's needed by
959 // various controls (e.g. wxStaticText) to determine whether to draw
960 // transparently or not. TODO: maybe this should be a new function
961 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
962 // parent?
963 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
964 m_canvas->SetTransparent(FALSE);
965 }
966 }
967 }
968 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
969 {
970 (void)SetBkColor(GetHdc(), new_color);
971 }
972 }
973
974 void wxDC::SetBackgroundMode(int mode)
975 {
976 m_backgroundMode = mode;
977
978 // SetBackgroundColour now only refers to text background
979 // and m_backgroundMode is used there
980
981 /*
982 if (m_backgroundMode == wxTRANSPARENT)
983 ::SetBkMode(GetHdc(), TRANSPARENT);
984 else
985 ::SetBkMode(GetHdc(), OPAQUE);
986 */
987 }
988
989 void wxDC::SetLogicalFunction(int function)
990 {
991 m_logicalFunction = function;
992
993 SetRop((WXHDC) m_hDC);
994 }
995
996 void wxDC::SetRop(WXHDC dc)
997 {
998 if (!dc || m_logicalFunction < 0)
999 return;
1000
1001 int c_rop;
1002 // These may be wrong
1003 switch (m_logicalFunction)
1004 {
1005 // case wxXOR: c_rop = R2_XORPEN; break;
1006 case wxXOR: c_rop = R2_NOTXORPEN; break;
1007 case wxINVERT: c_rop = R2_NOT; break;
1008 case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break;
1009 case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break;
1010 case wxCLEAR: c_rop = R2_WHITE; break;
1011 case wxSET: c_rop = R2_BLACK; break;
1012 case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break;
1013 case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break;
1014 case wxAND: c_rop = R2_MASKPEN; break;
1015 case wxOR: c_rop = R2_MERGEPEN; break;
1016 case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break;
1017 case wxEQUIV:
1018 case wxNAND:
1019 case wxCOPY:
1020 default:
1021 c_rop = R2_COPYPEN; break;
1022 }
1023 SetROP2((HDC) dc, c_rop);
1024 }
1025
1026 bool wxDC::StartDoc(const wxString& message)
1027 {
1028 // We might be previewing, so return TRUE to let it continue.
1029 return TRUE;
1030 }
1031
1032 void wxDC::EndDoc()
1033 {
1034 }
1035
1036 void wxDC::StartPage()
1037 {
1038 }
1039
1040 void wxDC::EndPage()
1041 {
1042 }
1043
1044 // ---------------------------------------------------------------------------
1045 // text metrics
1046 // ---------------------------------------------------------------------------
1047
1048 wxCoord wxDC::GetCharHeight() const
1049 {
1050 TEXTMETRIC lpTextMetric;
1051
1052 GetTextMetrics(GetHdc(), &lpTextMetric);
1053
1054 return YDEV2LOGREL(lpTextMetric.tmHeight);
1055 }
1056
1057 wxCoord wxDC::GetCharWidth() const
1058 {
1059 TEXTMETRIC lpTextMetric;
1060
1061 GetTextMetrics(GetHdc(), &lpTextMetric);
1062
1063 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1064 }
1065
1066 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1067 wxCoord *descent, wxCoord *externalLeading,
1068 wxFont *theFont) const
1069 {
1070 wxFont *fontToUse = (wxFont*) theFont;
1071 if (!fontToUse)
1072 fontToUse = (wxFont*) &m_font;
1073
1074 SIZE sizeRect;
1075 TEXTMETRIC tm;
1076
1077 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1078 GetTextMetrics(GetHdc(), &tm);
1079
1080 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1081 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1082 if (descent) *descent = tm.tmDescent;
1083 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1084 }
1085
1086 void wxDC::SetMapMode(int mode)
1087 {
1088 m_mappingMode = mode;
1089
1090 int pixel_width = 0;
1091 int pixel_height = 0;
1092 int mm_width = 0;
1093 int mm_height = 0;
1094
1095 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1096 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1097 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1098 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1099
1100 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1101 {
1102 return;
1103 }
1104
1105 double mm2pixelsX = pixel_width/mm_width;
1106 double mm2pixelsY = pixel_height/mm_height;
1107
1108 switch (mode)
1109 {
1110 case wxMM_TWIPS:
1111 {
1112 m_logicalScaleX = (twips2mm * mm2pixelsX);
1113 m_logicalScaleY = (twips2mm * mm2pixelsY);
1114 break;
1115 }
1116 case wxMM_POINTS:
1117 {
1118 m_logicalScaleX = (pt2mm * mm2pixelsX);
1119 m_logicalScaleY = (pt2mm * mm2pixelsY);
1120 break;
1121 }
1122 case wxMM_METRIC:
1123 {
1124 m_logicalScaleX = mm2pixelsX;
1125 m_logicalScaleY = mm2pixelsY;
1126 break;
1127 }
1128 case wxMM_LOMETRIC:
1129 {
1130 m_logicalScaleX = (mm2pixelsX/10.0);
1131 m_logicalScaleY = (mm2pixelsY/10.0);
1132 break;
1133 }
1134 default:
1135 case wxMM_TEXT:
1136 {
1137 m_logicalScaleX = 1.0;
1138 m_logicalScaleY = 1.0;
1139 break;
1140 }
1141 }
1142
1143 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1144 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1145
1146 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1147 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1148 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1149 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1150 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1151 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1152 }
1153
1154 void wxDC::SetUserScale(double x, double y)
1155 {
1156 m_userScaleX = x;
1157 m_userScaleY = y;
1158
1159 SetMapMode(m_mappingMode);
1160 }
1161
1162 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1163 {
1164 m_signX = xLeftRight ? 1 : -1;
1165 m_signY = yBottomUp ? -1 : 1;
1166
1167 SetMapMode(m_mappingMode);
1168 }
1169
1170 void wxDC::SetSystemScale(double x, double y)
1171 {
1172 m_scaleX = x;
1173 m_scaleY = y;
1174
1175 SetMapMode(m_mappingMode);
1176 }
1177
1178 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1179 {
1180 m_logicalOriginX = x;
1181 m_logicalOriginY = y;
1182
1183 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1184 }
1185
1186 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1187 {
1188 m_deviceOriginX = x;
1189 m_deviceOriginY = y;
1190
1191 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1192 }
1193
1194 // ---------------------------------------------------------------------------
1195 // coordinates transformations
1196 // ---------------------------------------------------------------------------
1197
1198 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1199 {
1200 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1201 }
1202
1203 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1204 {
1205 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1206 }
1207
1208 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1209 {
1210 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1211 }
1212
1213 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1214 {
1215 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1216 }
1217
1218 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1219 {
1220 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1221 }
1222
1223 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1224 {
1225 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1226 }
1227
1228 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1229 {
1230 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1231 }
1232
1233 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1234 {
1235 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1236 }
1237
1238 // ---------------------------------------------------------------------------
1239 // bit blit
1240 // ---------------------------------------------------------------------------
1241 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
1242 wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop, bool useMask)
1243 {
1244 wxCoord xdest1 = xdest;
1245 wxCoord ydest1 = ydest;
1246 wxCoord xsrc1 = xsrc;
1247 wxCoord ysrc1 = ysrc;
1248
1249 COLORREF old_textground = ::GetTextColor(GetHdc());
1250 COLORREF old_background = ::GetBkColor(GetHdc());
1251 if (m_textForegroundColour.Ok())
1252 {
1253 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1254 }
1255 if (m_textBackgroundColour.Ok())
1256 {
1257 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1258 }
1259
1260 DWORD dwRop = rop == wxCOPY ? SRCCOPY :
1261 rop == wxCLEAR ? WHITENESS :
1262 rop == wxSET ? BLACKNESS :
1263 rop == wxINVERT ? DSTINVERT :
1264 rop == wxAND ? MERGECOPY :
1265 rop == wxOR ? MERGEPAINT :
1266 rop == wxSRC_INVERT ? NOTSRCCOPY :
1267 rop == wxXOR ? SRCINVERT :
1268 rop == wxOR_REVERSE ? MERGEPAINT :
1269 rop == wxAND_REVERSE ? SRCERASE :
1270 rop == wxSRC_OR ? SRCPAINT :
1271 rop == wxSRC_AND ? SRCAND :
1272 SRCCOPY;
1273
1274 bool success = TRUE;
1275 if (useMask && source->m_selectedBitmap.Ok() && source->m_selectedBitmap.GetMask())
1276 {
1277
1278 #if 0 // __WIN32__
1279 // Not implemented under Win95 (or maybe a specific device?)
1280 if (MaskBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1281 (HDC) source->m_hDC, xsrc1, ysrc1, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap(),
1282 0, 0, 0xAACC0020))
1283 {
1284 // Success
1285 }
1286 else
1287 #endif
1288 {
1289 // New code from Chris Breeze, 15/7/98
1290 // Blit bitmap with mask
1291
1292 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1293 {
1294 // If we are printing source colours are screen colours
1295 // not printer colours and so we need copy the bitmap
1296 // pixel by pixel.
1297 RECT rect;
1298 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1299 HDC dc_src = (HDC) source->m_hDC;
1300
1301 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1302 for (int x = 0; x < width; x++)
1303 {
1304 for (int y = 0; y < height; y++)
1305 {
1306 COLORREF cref = ::GetPixel(dc_mask, x, y);
1307 if (cref)
1308 {
1309 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1310 rect.left = xdest1 + x; rect.right = rect.left + 1;
1311 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1312 ::FillRect(GetHdc(), &rect, brush);
1313 ::DeleteObject(brush);
1314 }
1315 }
1316 }
1317 ::SelectObject(dc_mask, 0);
1318 ::DeleteDC(dc_mask);
1319 }
1320 else
1321 {
1322 // create a temp buffer bitmap and DCs to access it and the mask
1323 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1324 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1325 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1326 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1327 ::SelectObject(dc_buffer, buffer_bmap);
1328
1329 // copy dest to buffer
1330 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1331 GetHdc(), xdest1, ydest1, SRCCOPY);
1332
1333 // copy src to buffer using selected raster op
1334 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1335 (HDC) source->m_hDC, xsrc1, ysrc1, dwRop);
1336
1337 // set masked area in buffer to BLACK (pixel value 0)
1338 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1339 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1340 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1341 dc_mask, xsrc1, ysrc1, SRCAND);
1342
1343 // set unmasked area in dest to BLACK
1344 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1345 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1346 ::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1347 dc_mask, xsrc1, ysrc1, SRCAND);
1348 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1349 ::SetTextColor(GetHdc(), prevCol);
1350
1351 // OR buffer to dest
1352 success = (::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1353 dc_buffer, 0, 0, SRCPAINT) != 0);
1354
1355 // tidy up temporary DCs and bitmap
1356 ::SelectObject(dc_mask, 0);
1357 ::DeleteDC(dc_mask);
1358 ::SelectObject(dc_buffer, 0);
1359 ::DeleteDC(dc_buffer);
1360 ::DeleteObject(buffer_bmap);
1361 }
1362 }
1363 }
1364 else
1365 {
1366 // If we are printing, source colours are screen colours
1367 // not printer colours and so we need copy the bitmap
1368 // pixel by pixel.
1369 if (IsKindOf(CLASSINFO(wxPrinterDC)))
1370 {
1371 HDC dc_src = (HDC) source->m_hDC;
1372 RECT rect;
1373 for (int y = 0; y < height; y++)
1374 {
1375 // This is Stefan Csomor's optimisation, where
1376 // identical adjacent pixels are drawn together.
1377 // We still need a faster way of drawing bitmaps,
1378 // perhaps converting to a DIB first and using SetDIBitsToDevice.
1379 for (int x = 0; x < width; x++)
1380 {
1381 COLORREF col = ::GetPixel(dc_src, x, y) ;
1382 HBRUSH brush = ::CreateSolidBrush( col );
1383
1384 rect.left = xdest1 + x;
1385 rect.top = ydest1 + y;
1386 while( (x + 1 < width) && (::GetPixel(dc_src, x + 1, y) == col ) )
1387 {
1388 ++x ;
1389 }
1390 rect.right = xdest1 + x + 1;
1391 rect.bottom = rect.top + 1;
1392 ::FillRect((HDC) m_hDC, &rect, brush);
1393 ::DeleteObject(brush);
1394 }
1395 }
1396 /*
1397 HDC dc_src = (HDC) source->m_hDC;
1398 RECT rect;
1399 for (int x = 0; x < width; x++)
1400 {
1401 for (int y = 0; y < height; y++)
1402 {
1403 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1404 rect.left = xdest1 + x; rect.right = rect.left + 1;
1405 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1406 ::FillRect(GetHdc(), &rect, brush);
1407 ::DeleteObject(brush);
1408 }
1409 }
1410 */
1411 }
1412 else
1413 {
1414 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height, (HDC) source->m_hDC,
1415 xsrc1, ysrc1, dwRop) != 0);
1416 }
1417 }
1418 ::SetTextColor(GetHdc(), old_textground);
1419 ::SetBkColor(GetHdc(), old_background);
1420
1421 return success;
1422 }
1423
1424 void wxDC::DoGetSize(int *w, int *h) const
1425 {
1426 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1427 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1428 }
1429
1430 void wxDC::DoGetSizeMM(int *w, int *h) const
1431 {
1432 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1433 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1434 }
1435
1436 wxSize wxDC::GetPPI() const
1437 {
1438 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1439 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1440
1441 return wxSize(x, y);
1442 }
1443
1444 // For use by wxWindows only, unless custom units are required.
1445 void wxDC::SetLogicalScale(double x, double y)
1446 {
1447 m_logicalScaleX = x;
1448 m_logicalScaleY = y;
1449 }
1450
1451 #if WXWIN_COMPATIBILITY
1452 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1453 float *descent, float *externalLeading,
1454 wxFont *theFont, bool use16bit) const
1455 {
1456 wxCoord x1, y1, descent1, externalLeading1;
1457 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1458 *x = x1; *y = y1;
1459 if (descent)
1460 *descent = descent1;
1461 if (externalLeading)
1462 *externalLeading = externalLeading1;
1463 }
1464 #endif
1465
1466 // ---------------------------------------------------------------------------
1467 // spline drawing code
1468 // ---------------------------------------------------------------------------
1469
1470 #if wxUSE_SPLINES
1471
1472 class wxSpline: public wxObject
1473 {
1474 public:
1475 int type;
1476 wxList *points;
1477
1478 wxSpline(wxList *list);
1479 void DeletePoints();
1480
1481 // Doesn't delete points
1482 ~wxSpline();
1483 };
1484
1485 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1486
1487 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1488 double a3, double b3, double a4, double b4);
1489 void wx_clear_stack();
1490 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1491 double *y3, double *x4, double *y4);
1492 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1493 double x4, double y4);
1494 static bool wx_spline_add_point(double x, double y);
1495 static void wx_spline_draw_point_array(wxDC *dc);
1496 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1497
1498 void wxDC::DoDrawSpline(wxList *list)
1499 {
1500 wxSpline spline(list);
1501
1502 wx_draw_open_spline(this, &spline);
1503 }
1504
1505 wxList wx_spline_point_list;
1506
1507 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1508 {
1509 wxPoint *p;
1510 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1511 double x1, y1, x2, y2;
1512
1513 wxNode *node = spline->points->First();
1514 p = (wxPoint *)node->Data();
1515
1516 x1 = p->x;
1517 y1 = p->y;
1518
1519 node = node->Next();
1520 p = (wxPoint *)node->Data();
1521
1522 x2 = p->x;
1523 y2 = p->y;
1524 cx1 = (double)((x1 + x2) / 2);
1525 cy1 = (double)((y1 + y2) / 2);
1526 cx2 = (double)((cx1 + x2) / 2);
1527 cy2 = (double)((cy1 + y2) / 2);
1528
1529 wx_spline_add_point(x1, y1);
1530
1531 while ((node = node->Next()) != NULL)
1532 {
1533 p = (wxPoint *)node->Data();
1534 x1 = x2;
1535 y1 = y2;
1536 x2 = p->x;
1537 y2 = p->y;
1538 cx4 = (double)(x1 + x2) / 2;
1539 cy4 = (double)(y1 + y2) / 2;
1540 cx3 = (double)(x1 + cx4) / 2;
1541 cy3 = (double)(y1 + cy4) / 2;
1542
1543 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1544
1545 cx1 = cx4;
1546 cy1 = cy4;
1547 cx2 = (double)(cx1 + x2) / 2;
1548 cy2 = (double)(cy1 + y2) / 2;
1549 }
1550
1551 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1552 wx_spline_add_point(x2, y2);
1553
1554 wx_spline_draw_point_array(dc);
1555
1556 }
1557
1558 /********************* CURVES FOR SPLINES *****************************
1559
1560 The following spline drawing routine is from
1561
1562 "An Algorithm for High-Speed Curve Generation"
1563 by George Merrill Chaikin,
1564 Computer Graphics and Image Processing, 3, Academic Press,
1565 1974, 346-349.
1566
1567 and
1568
1569 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1570 Computer Graphics and Image Processing, 4, Academic Press,
1571 1975, 304-310.
1572
1573 ***********************************************************************/
1574
1575 #define half(z1, z2) ((z1+z2)/2.0)
1576 #define THRESHOLD 5
1577
1578 /* iterative version */
1579
1580 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1581 double b4)
1582 {
1583 register double xmid, ymid;
1584 double x1, y1, x2, y2, x3, y3, x4, y4;
1585
1586 wx_clear_stack();
1587 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1588
1589 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1590 xmid = (double)half(x2, x3);
1591 ymid = (double)half(y2, y3);
1592 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1593 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1594 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1595 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1596 } else {
1597 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1598 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1599 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1600 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1601 }
1602 }
1603 }
1604
1605
1606 /* utilities used by spline drawing routines */
1607
1608
1609 typedef struct wx_spline_stack_struct {
1610 double x1, y1, x2, y2, x3, y3, x4, y4;
1611 }
1612 Stack;
1613
1614 #define SPLINE_STACK_DEPTH 20
1615 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1616 static Stack *wx_stack_top;
1617 static int wx_stack_count;
1618
1619 void wx_clear_stack()
1620 {
1621 wx_stack_top = wx_spline_stack;
1622 wx_stack_count = 0;
1623 }
1624
1625 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1626 {
1627 wx_stack_top->x1 = x1;
1628 wx_stack_top->y1 = y1;
1629 wx_stack_top->x2 = x2;
1630 wx_stack_top->y2 = y2;
1631 wx_stack_top->x3 = x3;
1632 wx_stack_top->y3 = y3;
1633 wx_stack_top->x4 = x4;
1634 wx_stack_top->y4 = y4;
1635 wx_stack_top++;
1636 wx_stack_count++;
1637 }
1638
1639 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1640 double *x3, double *y3, double *x4, double *y4)
1641 {
1642 if (wx_stack_count == 0)
1643 return (0);
1644 wx_stack_top--;
1645 wx_stack_count--;
1646 *x1 = wx_stack_top->x1;
1647 *y1 = wx_stack_top->y1;
1648 *x2 = wx_stack_top->x2;
1649 *y2 = wx_stack_top->y2;
1650 *x3 = wx_stack_top->x3;
1651 *y3 = wx_stack_top->y3;
1652 *x4 = wx_stack_top->x4;
1653 *y4 = wx_stack_top->y4;
1654 return (1);
1655 }
1656
1657 static bool wx_spline_add_point(double x, double y)
1658 {
1659 wxPoint *point = new wxPoint;
1660 point->x = (int) x;
1661 point->y = (int) y;
1662 wx_spline_point_list.Append((wxObject*)point);
1663 return TRUE;
1664 }
1665
1666 static void wx_spline_draw_point_array(wxDC *dc)
1667 {
1668 dc->DrawLines(&wx_spline_point_list, 0, 0);
1669 wxNode *node = wx_spline_point_list.First();
1670 while (node)
1671 {
1672 wxPoint *point = (wxPoint *)node->Data();
1673 delete point;
1674 delete node;
1675 node = wx_spline_point_list.First();
1676 }
1677 }
1678
1679 wxSpline::wxSpline(wxList *list)
1680 {
1681 points = list;
1682 }
1683
1684 wxSpline::~wxSpline()
1685 {
1686 }
1687
1688 void wxSpline::DeletePoints()
1689 {
1690 for(wxNode *node = points->First(); node; node = points->First())
1691 {
1692 wxPoint *point = (wxPoint *)node->Data();
1693 delete point;
1694 delete node;
1695 }
1696 delete points;
1697 }
1698
1699
1700 #endif // wxUSE_SPLINES
1701
wxWidgets (Impactor)