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fixed ReadString for wxUSE_UNICODE
[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 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
27
28 #ifdef __BORLANDC__
29 #pragma hdrstop
30 #endif
31
32 #ifndef WX_PRECOMP
33 #include "wx/window.h"
34 #include "wx/dc.h"
35 #include "wx/utils.h"
36 #include "wx/dialog.h"
37 #include "wx/app.h"
38 #include "wx/bitmap.h"
39 #include "wx/dcmemory.h"
40 #include "wx/log.h"
41 #include "wx/icon.h"
42 #endif
43
44 #include "wx/dcprint.h"
45
46 #include <string.h>
47 #include <math.h>
48
49 #if wxUSE_COMMON_DIALOGS
50 #if wxUSE_NORLANDER_HEADERS
51 #include <windows.h>
52 #endif
53 #include <commdlg.h>
54 #endif
55
56 #ifndef __WIN32__
57 #include <print.h>
58 #endif
59
60 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
61
62 // ---------------------------------------------------------------------------
63 // constants
64 // ---------------------------------------------------------------------------
65
66 static const int VIEWPORT_EXTENT = 1000;
67
68 static const int MM_POINTS = 9;
69 static const int MM_METRIC = 10;
70
71 // usually this is defined in math.h
72 #ifndef M_PI
73 static const double M_PI = 3.14159265358979323846;
74 #endif // M_PI
75
76 // ---------------------------------------------------------------------------
77 // private functions
78 // ---------------------------------------------------------------------------
79
80 // convert degrees to radians
81 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
82
83 // ===========================================================================
84 // implementation
85 // ===========================================================================
86
87 // ---------------------------------------------------------------------------
88 // wxDC
89 // ---------------------------------------------------------------------------
90
91 // Default constructor
92 wxDC::wxDC()
93 {
94 m_canvas = NULL;
95
96 m_oldBitmap = 0;
97 m_oldPen = 0;
98 m_oldBrush = 0;
99 m_oldFont = 0;
100 m_oldPalette = 0;
101
102 m_bOwnsDC = FALSE;
103 m_hDC = 0;
104
105 m_windowExtX = VIEWPORT_EXTENT;
106 m_windowExtY = VIEWPORT_EXTENT;
107
108 m_hDCCount = 0;
109 }
110
111
112 wxDC::~wxDC()
113 {
114 if ( m_hDC != 0 ) {
115 SelectOldObjects(m_hDC);
116 if ( m_bOwnsDC ) {
117 if ( m_canvas == NULL )
118 ::DeleteDC(GetHdc());
119 else
120 ::ReleaseDC((HWND)m_canvas->GetHWND(), GetHdc());
121 }
122 }
123
124 }
125
126 // This will select current objects out of the DC,
127 // which is what you have to do before deleting the
128 // DC.
129 void wxDC::SelectOldObjects(WXHDC dc)
130 {
131 if (dc)
132 {
133 if (m_oldBitmap)
134 {
135 ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
136 if (m_selectedBitmap.Ok())
137 {
138 m_selectedBitmap.SetSelectedInto(NULL);
139 }
140 }
141 m_oldBitmap = 0;
142 if (m_oldPen)
143 {
144 ::SelectObject((HDC) dc, (HPEN) m_oldPen);
145 }
146 m_oldPen = 0;
147 if (m_oldBrush)
148 {
149 ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
150 }
151 m_oldBrush = 0;
152 if (m_oldFont)
153 {
154 ::SelectObject((HDC) dc, (HFONT) m_oldFont);
155 }
156 m_oldFont = 0;
157 if (m_oldPalette)
158 {
159 ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE);
160 }
161 m_oldPalette = 0;
162 }
163
164 m_brush = wxNullBrush;
165 m_pen = wxNullPen;
166 m_palette = wxNullPalette;
167 m_font = wxNullFont;
168 m_backgroundBrush = wxNullBrush;
169 m_selectedBitmap = wxNullBitmap;
170 }
171
172 // ---------------------------------------------------------------------------
173 // clipping
174 // ---------------------------------------------------------------------------
175
176 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
177 {
178 m_clipping = TRUE;
179 m_clipX1 = (int)cx;
180 m_clipY1 = (int)cy;
181 m_clipX2 = (int)(cx + cw);
182 m_clipY2 = (int)(cy + ch);
183
184 DoClipping((WXHDC) m_hDC);
185 }
186
187 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
188 {
189 wxCHECK_RET( region.GetHRGN(), wxT("invalid clipping region") );
190
191 wxRect box = region.GetBox();
192
193 m_clipping = TRUE;
194 m_clipX1 = box.x;
195 m_clipY1 = box.y;
196 m_clipX2 = box.x + box.width;
197 m_clipY2 = box.y + box.height;
198
199 #ifdef __WIN16__
200 SelectClipRgn(GetHdc(), (HRGN) region.GetHRGN());
201 #else
202 ExtSelectClipRgn(GetHdc(), (HRGN) region.GetHRGN(), RGN_AND);
203 #endif
204 }
205
206 void wxDC::DoClipping(WXHDC dc)
207 {
208 if (m_clipping && dc)
209 {
210 IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1), YLOG2DEV(m_clipY1),
211 XLOG2DEV(m_clipX2), YLOG2DEV(m_clipY2));
212 }
213 }
214
215 void wxDC::DestroyClippingRegion()
216 {
217 if (m_clipping && m_hDC)
218 {
219 // TODO: this should restore the previous clipping region,
220 // so that OnPaint processing works correctly, and the update clipping region
221 // doesn't get destroyed after the first DestroyClippingRegion.
222 HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
223 SelectClipRgn(GetHdc(), rgn);
224 DeleteObject(rgn);
225 }
226 m_clipping = FALSE;
227 }
228
229 // ---------------------------------------------------------------------------
230 // query capabilities
231 // ---------------------------------------------------------------------------
232
233 bool wxDC::CanDrawBitmap() const
234 {
235 return TRUE;
236 }
237
238 bool wxDC::CanGetTextExtent() const
239 {
240 // What sort of display is it?
241 int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
242
243 return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
244 }
245
246 int wxDC::GetDepth() const
247 {
248 return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
249 }
250
251 // ---------------------------------------------------------------------------
252 // drawing
253 // ---------------------------------------------------------------------------
254
255 void wxDC::Clear()
256 {
257 RECT rect;
258 if ( m_canvas )
259 {
260 GetClientRect((HWND) m_canvas->GetHWND(), &rect);
261 }
262 else
263 {
264 wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") );
265
266 rect.left = 0; rect.top = 0;
267 rect.right = m_selectedBitmap.GetWidth();
268 rect.bottom = m_selectedBitmap.GetHeight();
269 }
270
271 (void) ::SetMapMode(GetHdc(), MM_TEXT);
272
273 DWORD colour = GetBkColor(GetHdc());
274 HBRUSH brush = CreateSolidBrush(colour);
275 FillRect(GetHdc(), &rect, brush);
276 DeleteObject(brush);
277
278 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
279 ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
280 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
281 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
282 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
283 }
284
285 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
286 {
287 (void)ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
288 col.GetPixel(),
289 style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
290 : FLOODFILLBORDER);
291
292 CalcBoundingBox(x, y);
293 }
294
295 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
296 {
297 // added by steve 29.12.94 (copied from DrawPoint)
298 // returns TRUE for pixels in the color of the current pen
299 // and FALSE for all other pixels colors
300 // if col is non-NULL return the color of the pixel
301
302 // get the color of the pixel
303 COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
304 // get the color of the pen
305 COLORREF pencolor = 0x00ffffff;
306 if (m_pen.Ok())
307 {
308 pencolor = m_pen.GetColour().GetPixel();
309 }
310
311 // return the color of the pixel
312 if(col)
313 col->Set(GetRValue(pixelcolor),GetGValue(pixelcolor),GetBValue(pixelcolor));
314
315 // check, if color of the pixels is the same as the color
316 // of the current pen
317 return(pixelcolor==pencolor);
318 }
319
320 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
321 {
322 wxCoord x1 = x-VIEWPORT_EXTENT;
323 wxCoord y1 = y-VIEWPORT_EXTENT;
324 wxCoord x2 = x+VIEWPORT_EXTENT;
325 wxCoord y2 = y+VIEWPORT_EXTENT;
326
327 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
328 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
329
330 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
331 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
332
333 CalcBoundingBox(x1, y1);
334 CalcBoundingBox(x2, y2);
335 }
336
337 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
338 {
339 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
340 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
341
342 /* MATTHEW: [6] New normalization */
343 #if WX_STANDARD_GRAPHICS
344 (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
345 #endif
346
347 CalcBoundingBox(x1, y1);
348 CalcBoundingBox(x2, y2);
349 }
350
351 void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc)
352 {
353 double dx = xc-x1;
354 double dy = yc-y1;
355 double radius = (double)sqrt(dx*dx+dy*dy) ;;
356 if (x1==x2 && x2==y2)
357 {
358 DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0));
359 return;
360 }
361
362 wxCoord xx1 = XLOG2DEV(x1);
363 wxCoord yy1 = YLOG2DEV(y1);
364 wxCoord xx2 = XLOG2DEV(x2);
365 wxCoord yy2 = YLOG2DEV(y2);
366 wxCoord xxc = XLOG2DEV(xc);
367 wxCoord yyc = YLOG2DEV(yc);
368 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
369
370 (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL);
371 wxCoord xxx1 = (wxCoord) (xxc-ray);
372 wxCoord yyy1 = (wxCoord) (yyc-ray);
373 wxCoord xxx2 = (wxCoord) (xxc+ray);
374 wxCoord yyy2 = (wxCoord) (yyc+ray);
375 if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT)
376 {
377 // Have to add 1 to bottom-right corner of rectangle
378 // to make semi-circles look right (crooked line otherwise).
379 // Unfortunately this is not a reliable method, depends
380 // on the size of shape.
381 // TODO: figure out why this happens!
382 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1,
383 xx1,yy1,xx2,yy2);
384 }
385 else
386 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2,
387 xx1,yy1,xx2,yy2);
388
389 CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius));
390 CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius));
391 }
392
393 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
394 {
395 COLORREF color = 0x00ffffff;
396 if (m_pen.Ok())
397 {
398 color = m_pen.GetColour().GetPixel();
399 }
400
401 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
402
403 CalcBoundingBox(x, y);
404 }
405
406 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
407 {
408 // Do things less efficiently if we have offsets
409 if (xoffset != 0 || yoffset != 0)
410 {
411 POINT *cpoints = new POINT[n];
412 int i;
413 for (i = 0; i < n; i++)
414 {
415 cpoints[i].x = (int)(points[i].x + xoffset);
416 cpoints[i].y = (int)(points[i].y + yoffset);
417
418 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
419 }
420 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
421 (void)Polygon(GetHdc(), cpoints, n);
422 SetPolyFillMode(GetHdc(),prev);
423 delete[] cpoints;
424 }
425 else
426 {
427 int i;
428 for (i = 0; i < n; i++)
429 CalcBoundingBox(points[i].x, points[i].y);
430
431 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
432 (void)Polygon(GetHdc(), (POINT*) points, n);
433 SetPolyFillMode(GetHdc(),prev);
434 }
435 }
436
437 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
438 {
439 // Do things less efficiently if we have offsets
440 if (xoffset != 0 || yoffset != 0)
441 {
442 POINT *cpoints = new POINT[n];
443 int i;
444 for (i = 0; i < n; i++)
445 {
446 cpoints[i].x = (int)(points[i].x + xoffset);
447 cpoints[i].y = (int)(points[i].y + yoffset);
448
449 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
450 }
451 (void)Polyline(GetHdc(), cpoints, n);
452 delete[] cpoints;
453 }
454 else
455 {
456 int i;
457 for (i = 0; i < n; i++)
458 CalcBoundingBox(points[i].x, points[i].y);
459
460 (void)Polyline(GetHdc(), (POINT*) points, n);
461 }
462 }
463
464 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
465 {
466 wxCoord x2 = x + width;
467 wxCoord y2 = y + height;
468
469 /* MATTHEW: [6] new normalization */
470 #if WX_STANDARD_GRAPHICS
471 bool do_brush, do_pen;
472
473 do_brush = m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT;
474 do_pen = m_pen.Ok() && m_pen.GetStyle() != wxTRANSPARENT;
475
476 if (do_brush) {
477 HPEN orig_pen = NULL;
478
479 if (do_pen || !m_pen.Ok())
480 orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
481
482 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
483 XLOG2DEV(x2) + 1, YLOG2DEV(y2) + 1);
484
485 if (do_pen || !m_pen.Ok())
486 ::SelectObject(GetHdc() , orig_pen);
487 }
488 if (do_pen) {
489 HBRUSH orig_brush = NULL;
490
491 if (do_brush || !m_brush.Ok())
492 orig_brush = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH) ::GetStockObject(NULL_BRUSH));
493
494 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
495 XLOG2DEV(x2), YLOG2DEV(y2));
496
497 if (do_brush || !m_brush.Ok())
498 ::SelectObject(GetHdc(), orig_brush);
499 }
500 #else
501 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
502 #endif
503
504 CalcBoundingBox(x, y);
505 CalcBoundingBox(x2, y2);
506 }
507
508 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
509 {
510 // Now, a negative radius value is interpreted to mean
511 // 'the proportion of the smallest X or Y dimension'
512
513 if (radius < 0.0)
514 {
515 double smallest = 0.0;
516 if (width < height)
517 smallest = width;
518 else
519 smallest = height;
520 radius = (- radius * smallest);
521 }
522
523 wxCoord x2 = (x+width);
524 wxCoord y2 = (y+height);
525
526 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
527 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
528
529 CalcBoundingBox(x, y);
530 CalcBoundingBox(x2, y2);
531 }
532
533 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
534 {
535 wxCoord x2 = (x+width);
536 wxCoord y2 = (y+height);
537
538 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
539
540 CalcBoundingBox(x, y);
541 CalcBoundingBox(x2, y2);
542 }
543
544 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
545 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
546 {
547 wxCoord x2 = (x+w);
548 wxCoord y2 = (y+h);
549
550 int rx1 = XLOG2DEV(x+w/2);
551 int ry1 = YLOG2DEV(y+h/2);
552 int rx2 = rx1;
553 int ry2 = ry1;
554
555 sa = DegToRad(sa);
556 ea = DegToRad(ea);
557
558 rx1 += (int)(100.0 * abs(w) * cos(sa));
559 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
560 rx2 += (int)(100.0 * abs(w) * cos(ea));
561 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
562
563 // draw pie with NULL_PEN first and then outline otherwise a line is
564 // drawn from the start and end points to the centre
565 HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
566 if (m_signY > 0)
567 {
568 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
569 rx1, ry1, rx2, ry2);
570 }
571 else
572 {
573 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
574 rx1, ry1-1, rx2, ry2-1);
575 }
576 ::SelectObject(GetHdc(), orig_pen);
577 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
578 rx1, ry1, rx2, ry2);
579
580 CalcBoundingBox(x, y);
581 CalcBoundingBox(x2, y2);
582 }
583
584 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
585 {
586 #if defined(__WIN32__) && !defined(__SC__) && !defined(__TWIN32__)
587 ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON(),
588 icon.GetWidth(), icon.GetHeight(), 0, 0, DI_NORMAL);
589 #else
590 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON());
591 #endif
592
593 CalcBoundingBox(x, y);
594 CalcBoundingBox(x+icon.GetWidth(), y+icon.GetHeight());
595 }
596
597 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
598 {
599 if (!bmp.Ok())
600 return;
601
602 bool needsPixelCopy = FALSE ;
603 bool isPrinter = FALSE ;
604 if (IsKindOf(CLASSINFO(wxPrinterDC)) )
605 {
606 isPrinter = TRUE ;
607 if ( ::GetDeviceCaps((HDC) m_hDC, RASTERCAPS) & RC_STRETCHDIB )
608 {
609 }
610 else
611 {
612 needsPixelCopy = TRUE ;
613 }
614 }
615 // If we're not drawing transparently, and not drawing to a printer,
616 // optimize this function to use Windows functions.
617 if (!useMask && !needsPixelCopy)
618 {
619 if ( isPrinter )
620 {
621 BITMAPINFO *info = (BITMAPINFO *) malloc( sizeof( BITMAPINFOHEADER ) + 256 * sizeof(RGBQUAD ) ) ;
622 int iBitsSize = ((bmp.GetWidth() + 3 ) & ~3 ) * bmp.GetHeight() ;
623
624 void* bits = malloc( iBitsSize ) ;
625
626 memset( info , 0 , sizeof( BITMAPINFOHEADER ) ) ;
627
628 info->bmiHeader.biSize = sizeof( BITMAPINFOHEADER ) ;
629 info->bmiHeader.biWidth = bmp.GetWidth() ;
630 info->bmiHeader.biHeight = bmp.GetHeight() ;
631 info->bmiHeader.biPlanes = 1 ;
632 info->bmiHeader.biBitCount = 8 ;
633 info->bmiHeader.biCompression = BI_RGB ;
634
635 HDC display = GetDC( NULL ) ;
636 if ( GetDIBits( display , (HBITMAP) bmp.GetHBITMAP( ) , 0 , bmp.GetHeight() , bits , info , DIB_RGB_COLORS ) )
637 {
638 StretchDIBits( (HDC) m_hDC,
639 x, y, bmp.GetWidth(), bmp.GetHeight() ,
640 0 , 0 ,bmp.GetWidth(), bmp.GetHeight() ,
641 bits , info , DIB_RGB_COLORS , SRCCOPY ) ;
642 }
643 ReleaseDC( NULL , display ) ;
644 free ( bits ) ;
645 free( info ) ;
646 }
647 else
648 {
649 HDC cdc = GetHdc();
650 HDC memdc = ::CreateCompatibleDC( cdc );
651 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
652
653 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
654
655 COLORREF old_textground = ::GetTextColor(GetHdc());
656 COLORREF old_background = ::GetBkColor(GetHdc());
657 if (m_textForegroundColour.Ok())
658 {
659 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
660 }
661 if (m_textBackgroundColour.Ok())
662 {
663 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
664 }
665
666 ::SelectObject( memdc, hbitmap );
667 ::BitBlt( cdc, x, y, bmp.GetWidth(), bmp.GetHeight(), memdc, 0, 0, SRCCOPY);
668 ::DeleteDC( memdc );
669
670 ::SetTextColor(GetHdc(), old_textground);
671 ::SetBkColor(GetHdc(), old_background);
672 }
673 }
674 else
675 {
676 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API level
677 wxMemoryDC memDC;
678 memDC.SelectObject(bmp);
679
680 /* Not sure if we need this. The mask should leave the
681 * masked areas as per the original background of this DC.
682 */
683 /*
684 // There might be transparent areas, so make these
685 // the same colour as this DC
686 memDC.SetBackground(* GetBackground());
687 memDC.Clear();
688 */
689
690 Blit(x, y, bmp.GetWidth(), bmp.GetHeight(), & memDC, 0, 0, wxCOPY, useMask);
691
692 memDC.SelectObject(wxNullBitmap);
693 }
694 }
695
696 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
697 {
698 DrawAnyText(text, x, y);
699
700 // update the bounding box
701 CalcBoundingBox(x, y);
702
703 wxCoord w, h;
704 GetTextExtent(text, &w, &h);
705 CalcBoundingBox(x + w, y + h);
706 }
707
708 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
709 {
710 // prepare for drawing the text
711 if ( m_textForegroundColour.Ok() )
712 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
713
714 DWORD old_background = 0;
715 if ( m_textBackgroundColour.Ok() )
716 {
717 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
718 }
719
720 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
721 : OPAQUE);
722
723 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
724 text.c_str(), text.length()) == 0 )
725 {
726 wxLogLastError("TextOut");
727 }
728
729 // restore the old parameters (text foreground colour may be left because
730 // it never is set to anything else, but background should remain
731 // transparent even if we just drew an opaque string)
732 if ( m_textBackgroundColour.Ok() )
733 (void)SetBkColor(GetHdc(), old_background);
734
735 SetBkMode(GetHdc(), TRANSPARENT);
736 }
737
738 void wxDC::DoDrawRotatedText(const wxString& text,
739 wxCoord x, wxCoord y,
740 double angle)
741 {
742 // we test that we have some font because otherwise we should still use the
743 // "else" part below to avoid that DrawRotatedText(angle = 180) and
744 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
745 // font for drawing rotated fonts unfortunately)
746 if ( (angle == 0.0) && m_font.Ok() )
747 {
748 DoDrawText(text, x, y);
749 }
750 else
751 {
752 // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
753 // can't have non zero orientation/escapement
754 wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
755 HFONT hfont = (HFONT)font.GetResourceHandle();
756 LOGFONT lf;
757 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
758 {
759 wxLogLastError("GetObject(hfont)");
760 }
761
762 // GDI wants the angle in tenth of degree
763 long angle10 = (long)(angle * 10);
764 lf.lfEscapement = angle10;
765 lf. lfOrientation = angle10;
766
767 hfont = ::CreateFontIndirect(&lf);
768 if ( !hfont )
769 {
770 wxLogLastError("CreateFont");
771 }
772 else
773 {
774 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
775
776 DrawAnyText(text, x, y);
777
778 (void)::SelectObject(GetHdc(), hfontOld);
779 }
780
781 // call the bounding box by adding all four vertices of the rectangle
782 // containing the text to it (simpler and probably not slower than
783 // determining which of them is really topmost/leftmost/...)
784 wxCoord w, h;
785 GetTextExtent(text, &w, &h);
786
787 double rad = DegToRad(angle);
788
789 // "upper left" and "upper right"
790 CalcBoundingBox(x, y);
791 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
792
793 // "bottom left" and "bottom right"
794 x += (wxCoord)(h*sin(rad));
795 y += (wxCoord)(h*cos(rad));
796 CalcBoundingBox(x, y);
797 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
798 }
799 }
800
801 // ---------------------------------------------------------------------------
802 // set GDI objects
803 // ---------------------------------------------------------------------------
804
805 void wxDC::SetPalette(const wxPalette& palette)
806 {
807 // Set the old object temporarily, in case the assignment deletes an object
808 // that's not yet selected out.
809 if (m_oldPalette)
810 {
811 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
812 m_oldPalette = 0;
813 }
814
815 m_palette = palette;
816
817 if (!m_palette.Ok())
818 {
819 // Setting a NULL colourmap is a way of restoring
820 // the original colourmap
821 if (m_oldPalette)
822 {
823 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
824 m_oldPalette = 0;
825 }
826
827 return;
828 }
829
830 if (m_palette.Ok() && m_palette.GetHPALETTE())
831 {
832 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
833 if (!m_oldPalette)
834 m_oldPalette = (WXHPALETTE) oldPal;
835
836 ::RealizePalette(GetHdc());
837 }
838 }
839
840 void wxDC::SetFont(const wxFont& the_font)
841 {
842 // Set the old object temporarily, in case the assignment deletes an object
843 // that's not yet selected out.
844 if (m_oldFont)
845 {
846 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
847 m_oldFont = 0;
848 }
849
850 m_font = the_font;
851
852 if (!the_font.Ok())
853 {
854 if (m_oldFont)
855 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
856 m_oldFont = 0;
857 }
858
859 if (m_font.Ok() && m_font.GetResourceHandle())
860 {
861 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
862 if (f == (HFONT) NULL)
863 {
864 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
865 }
866 if (!m_oldFont)
867 m_oldFont = (WXHFONT) f;
868 }
869 }
870
871 void wxDC::SetPen(const wxPen& pen)
872 {
873 // Set the old object temporarily, in case the assignment deletes an object
874 // that's not yet selected out.
875 if (m_oldPen)
876 {
877 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
878 m_oldPen = 0;
879 }
880
881 m_pen = pen;
882
883 if (!m_pen.Ok())
884 {
885 if (m_oldPen)
886 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
887 m_oldPen = 0;
888 }
889
890 if (m_pen.Ok())
891 {
892 if (m_pen.GetResourceHandle())
893 {
894 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
895 if (!m_oldPen)
896 m_oldPen = (WXHPEN) p;
897 }
898 }
899 }
900
901 void wxDC::SetBrush(const wxBrush& brush)
902 {
903 // Set the old object temporarily, in case the assignment deletes an object
904 // that's not yet selected out.
905 if (m_oldBrush)
906 {
907 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
908 m_oldBrush = 0;
909 }
910
911 m_brush = brush;
912
913 if (!m_brush.Ok())
914 {
915 if (m_oldBrush)
916 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
917 m_oldBrush = 0;
918 }
919
920 if (m_brush.Ok())
921 {
922 if (m_brush.GetResourceHandle())
923 {
924 HBRUSH b = 0;
925 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
926 if (!m_oldBrush)
927 m_oldBrush = (WXHBRUSH) b;
928 }
929 }
930 }
931
932 void wxDC::SetBackground(const wxBrush& brush)
933 {
934 m_backgroundBrush = brush;
935
936 if (!m_backgroundBrush.Ok())
937 return;
938
939 if (m_canvas)
940 {
941 bool customColours = TRUE;
942 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
943 // change background colours from the control-panel specified colours.
944 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
945 customColours = FALSE;
946
947 if (customColours)
948 {
949 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
950 {
951 m_canvas->SetTransparent(TRUE);
952 }
953 else
954 {
955 // New behaviour, 10/2/99: setting the background brush of a DC
956 // doesn't affect the window background colour. However,
957 // I'm leaving in the transparency setting because it's needed by
958 // various controls (e.g. wxStaticText) to determine whether to draw
959 // transparently or not. TODO: maybe this should be a new function
960 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
961 // parent?
962 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
963 m_canvas->SetTransparent(FALSE);
964 }
965 }
966 }
967 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
968 {
969 (void)SetBkColor(GetHdc(), new_color);
970 }
971 }
972
973 void wxDC::SetBackgroundMode(int mode)
974 {
975 m_backgroundMode = mode;
976
977 // SetBackgroundColour now only refers to text background
978 // and m_backgroundMode is used there
979
980 /*
981 if (m_backgroundMode == wxTRANSPARENT)
982 ::SetBkMode(GetHdc(), TRANSPARENT);
983 else
984 ::SetBkMode(GetHdc(), OPAQUE);
985 */
986 }
987
988 void wxDC::SetLogicalFunction(int function)
989 {
990 m_logicalFunction = function;
991
992 SetRop((WXHDC) m_hDC);
993 }
994
995 void wxDC::SetRop(WXHDC dc)
996 {
997 if (!dc || m_logicalFunction < 0)
998 return;
999
1000 int c_rop;
1001 // These may be wrong
1002 switch (m_logicalFunction)
1003 {
1004 // case wxXOR: c_rop = R2_XORPEN; break;
1005 case wxXOR: c_rop = R2_NOTXORPEN; break;
1006 case wxINVERT: c_rop = R2_NOT; break;
1007 case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break;
1008 case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break;
1009 case wxCLEAR: c_rop = R2_WHITE; break;
1010 case wxSET: c_rop = R2_BLACK; break;
1011 case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break;
1012 case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break;
1013 case wxAND: c_rop = R2_MASKPEN; break;
1014 case wxOR: c_rop = R2_MERGEPEN; break;
1015 case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break;
1016 case wxEQUIV:
1017 case wxNAND:
1018 case wxCOPY:
1019 default:
1020 c_rop = R2_COPYPEN; break;
1021 }
1022 SetROP2((HDC) dc, c_rop);
1023 }
1024
1025 bool wxDC::StartDoc(const wxString& message)
1026 {
1027 // We might be previewing, so return TRUE to let it continue.
1028 return TRUE;
1029 }
1030
1031 void wxDC::EndDoc()
1032 {
1033 }
1034
1035 void wxDC::StartPage()
1036 {
1037 }
1038
1039 void wxDC::EndPage()
1040 {
1041 }
1042
1043 // ---------------------------------------------------------------------------
1044 // text metrics
1045 // ---------------------------------------------------------------------------
1046
1047 wxCoord wxDC::GetCharHeight() const
1048 {
1049 TEXTMETRIC lpTextMetric;
1050
1051 GetTextMetrics(GetHdc(), &lpTextMetric);
1052
1053 return YDEV2LOGREL(lpTextMetric.tmHeight);
1054 }
1055
1056 wxCoord wxDC::GetCharWidth() const
1057 {
1058 TEXTMETRIC lpTextMetric;
1059
1060 GetTextMetrics(GetHdc(), &lpTextMetric);
1061
1062 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1063 }
1064
1065 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1066 wxCoord *descent, wxCoord *externalLeading,
1067 wxFont *theFont) const
1068 {
1069 wxFont *fontToUse = (wxFont*) theFont;
1070 if (!fontToUse)
1071 fontToUse = (wxFont*) &m_font;
1072
1073 SIZE sizeRect;
1074 TEXTMETRIC tm;
1075
1076 GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
1077 GetTextMetrics(GetHdc(), &tm);
1078
1079 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1080 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1081 if (descent) *descent = tm.tmDescent;
1082 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1083 }
1084
1085 void wxDC::SetMapMode(int mode)
1086 {
1087 m_mappingMode = mode;
1088
1089 int pixel_width = 0;
1090 int pixel_height = 0;
1091 int mm_width = 0;
1092 int mm_height = 0;
1093
1094 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1095 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1096 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1097 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1098
1099 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1100 {
1101 return;
1102 }
1103
1104 double mm2pixelsX = pixel_width/mm_width;
1105 double mm2pixelsY = pixel_height/mm_height;
1106
1107 switch (mode)
1108 {
1109 case wxMM_TWIPS:
1110 {
1111 m_logicalScaleX = (twips2mm * mm2pixelsX);
1112 m_logicalScaleY = (twips2mm * mm2pixelsY);
1113 break;
1114 }
1115 case wxMM_POINTS:
1116 {
1117 m_logicalScaleX = (pt2mm * mm2pixelsX);
1118 m_logicalScaleY = (pt2mm * mm2pixelsY);
1119 break;
1120 }
1121 case wxMM_METRIC:
1122 {
1123 m_logicalScaleX = mm2pixelsX;
1124 m_logicalScaleY = mm2pixelsY;
1125 break;
1126 }
1127 case wxMM_LOMETRIC:
1128 {
1129 m_logicalScaleX = (mm2pixelsX/10.0);
1130 m_logicalScaleY = (mm2pixelsY/10.0);
1131 break;
1132 }
1133 default:
1134 case wxMM_TEXT:
1135 {
1136 m_logicalScaleX = 1.0;
1137 m_logicalScaleY = 1.0;
1138 break;
1139 }
1140 }
1141
1142 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1143 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1144
1145 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1146 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1147 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1148 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1149 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1150 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1151 }
1152
1153 void wxDC::SetUserScale(double x, double y)
1154 {
1155 m_userScaleX = x;
1156 m_userScaleY = y;
1157
1158 SetMapMode(m_mappingMode);
1159 }
1160
1161 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1162 {
1163 m_signX = xLeftRight ? 1 : -1;
1164 m_signY = yBottomUp ? -1 : 1;
1165
1166 SetMapMode(m_mappingMode);
1167 }
1168
1169 void wxDC::SetSystemScale(double x, double y)
1170 {
1171 m_scaleX = x;
1172 m_scaleY = y;
1173
1174 SetMapMode(m_mappingMode);
1175 }
1176
1177 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1178 {
1179 m_logicalOriginX = x;
1180 m_logicalOriginY = y;
1181
1182 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1183 }
1184
1185 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1186 {
1187 m_deviceOriginX = x;
1188 m_deviceOriginY = y;
1189
1190 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1191 }
1192
1193 // ---------------------------------------------------------------------------
1194 // coordinates transformations
1195 // ---------------------------------------------------------------------------
1196
1197 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1198 {
1199 return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX);
1200 }
1201
1202 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1203 {
1204 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1205 }
1206
1207 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1208 {
1209 return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY);
1210 }
1211
1212 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1213 {
1214 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1215 }
1216
1217 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1218 {
1219 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1220 }
1221
1222 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1223 {
1224 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1225 }
1226
1227 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1228 {
1229 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1230 }
1231
1232 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1233 {
1234 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1235 }
1236
1237 // ---------------------------------------------------------------------------
1238 // bit blit
1239 // ---------------------------------------------------------------------------
1240 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
1241 wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop, bool useMask)
1242 {
1243 wxCoord xdest1 = xdest;
1244 wxCoord ydest1 = ydest;
1245 wxCoord xsrc1 = xsrc;
1246 wxCoord ysrc1 = ysrc;
1247
1248 COLORREF old_textground = ::GetTextColor(GetHdc());
1249 COLORREF old_background = ::GetBkColor(GetHdc());
1250 if (m_textForegroundColour.Ok())
1251 {
1252 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1253 }
1254 if (m_textBackgroundColour.Ok())
1255 {
1256 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1257 }
1258
1259 DWORD dwRop = rop == wxCOPY ? SRCCOPY :
1260 rop == wxCLEAR ? WHITENESS :
1261 rop == wxSET ? BLACKNESS :
1262 rop == wxINVERT ? DSTINVERT :
1263 rop == wxAND ? MERGECOPY :
1264 rop == wxOR ? MERGEPAINT :
1265 rop == wxSRC_INVERT ? NOTSRCCOPY :
1266 rop == wxXOR ? SRCINVERT :
1267 rop == wxOR_REVERSE ? MERGEPAINT :
1268 rop == wxAND_REVERSE ? SRCERASE :
1269 rop == wxSRC_OR ? SRCPAINT :
1270 rop == wxSRC_AND ? SRCAND :
1271 SRCCOPY;
1272
1273 bool success = TRUE;
1274 bool needsPixelCopy = FALSE ;
1275 bool isPrinter = FALSE ;
1276
1277 if (IsKindOf(CLASSINFO(wxPrinterDC)) )
1278 {
1279 isPrinter = TRUE ;
1280 if ( ::GetDeviceCaps((HDC) m_hDC, RASTERCAPS) & RC_STRETCHDIB )
1281 {
1282 }
1283 else
1284 {
1285 needsPixelCopy = TRUE ;
1286 }
1287 }
1288 if (useMask && !source->m_selectedBitmap.Ok())
1289 return FALSE;
1290
1291 if (useMask && !source->m_selectedBitmap.GetMask())
1292 useMask = FALSE;
1293
1294 if (useMask)
1295 {
1296
1297 #if 0 // __WIN32__
1298 // Not implemented under Win95 (or maybe a specific device?)
1299 if (MaskBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1300 (HDC) source->m_hDC, xsrc1, ysrc1, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap(),
1301 0, 0, 0xAACC0020))
1302 {
1303 // Success
1304 }
1305 else
1306 #endif
1307 {
1308 // New code from Chris Breeze, 15/7/98
1309 // Blit bitmap with mask
1310
1311 if (isPrinter)
1312 {
1313 // If we are printing source colours are screen colours
1314 // not printer colours and so we need copy the bitmap
1315 // pixel by pixel.
1316 RECT rect;
1317 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1318 HDC dc_src = (HDC) source->m_hDC;
1319
1320 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1321 for (int x = 0; x < width; x++)
1322 {
1323 for (int y = 0; y < height; y++)
1324 {
1325 COLORREF cref = ::GetPixel(dc_mask, x, y);
1326 if (cref)
1327 {
1328 HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
1329 rect.left = xdest1 + x; rect.right = rect.left + 1;
1330 rect.top = ydest1 + y; rect.bottom = rect.top + 1;
1331 ::FillRect(GetHdc(), &rect, brush);
1332 ::DeleteObject(brush);
1333 }
1334 }
1335 }
1336 ::SelectObject(dc_mask, 0);
1337 ::DeleteDC(dc_mask);
1338 }
1339 else
1340 {
1341 // create a temp buffer bitmap and DCs to access it and the mask
1342 HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC);
1343 HDC dc_buffer = ::CreateCompatibleDC(GetHdc());
1344 HBITMAP buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1345 ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
1346 ::SelectObject(dc_buffer, buffer_bmap);
1347
1348 // copy dest to buffer
1349 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1350 GetHdc(), xdest1, ydest1, SRCCOPY);
1351
1352 // copy src to buffer using selected raster op
1353 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1354 (HDC) source->m_hDC, xsrc1, ysrc1, dwRop);
1355
1356 // set masked area in buffer to BLACK (pixel value 0)
1357 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1358 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1359 ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1360 dc_mask, xsrc1, ysrc1, SRCAND);
1361
1362 // set unmasked area in dest to BLACK
1363 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1364 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1365 ::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1366 dc_mask, xsrc1, ysrc1, SRCAND);
1367 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1368 ::SetTextColor(GetHdc(), prevCol);
1369
1370 // OR buffer to dest
1371 success = (::BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
1372 dc_buffer, 0, 0, SRCPAINT) != 0);
1373
1374 // tidy up temporary DCs and bitmap
1375 ::SelectObject(dc_mask, 0);
1376 ::DeleteDC(dc_mask);
1377 ::SelectObject(dc_buffer, 0);
1378 ::DeleteDC(dc_buffer);
1379 ::DeleteObject(buffer_bmap);
1380 }
1381 }
1382 }
1383 else if (needsPixelCopy) // not masked, but we need pixel copy. Only true if it's a printer
1384 {
1385 // If we are printing, source colours are screen colours
1386 // not printer colours and so we need copy the bitmap
1387 // pixel by pixel.
1388 if (isPrinter)
1389 {
1390 HDC dc_src = (HDC) source->m_hDC;
1391 RECT rect;
1392 for (int y = 0; y < height; y++)
1393 {
1394 // This is Stefan Csomor's optimisation, where
1395 // identical adjacent pixels are drawn together.
1396 for (int x = 0; x < width; x++)
1397 {
1398 COLORREF col = ::GetPixel(dc_src, x, y) ;
1399 HBRUSH brush = ::CreateSolidBrush( col );
1400
1401 rect.left = xdest1 + x;
1402 rect.top = ydest1 + y;
1403 while( (x + 1 < width) && (::GetPixel(dc_src, x + 1, y) == col ) )
1404 {
1405 ++x ;
1406 }
1407 rect.right = xdest1 + x + 1;
1408 rect.bottom = rect.top + 1;
1409 ::FillRect((HDC) m_hDC, &rect, brush);
1410 ::DeleteObject(brush);
1411 }
1412 }
1413 }
1414 else
1415 {
1416 wxFAIL_MSG( "If needsPixelCopy is true, isPrinter should be true also." );
1417 }
1418 }
1419 else if (isPrinter) // not masked, not pixel copy
1420 {
1421 wxBitmap& bmp = source->m_selectedBitmap ;
1422 BITMAPINFO *info = (BITMAPINFO *) malloc( sizeof( BITMAPINFOHEADER ) + 256 * sizeof(RGBQUAD ) ) ;
1423 int iBitsSize = ((bmp.GetWidth() + 3 ) & ~3 ) * bmp.GetHeight() ;
1424
1425 void* bits = malloc( iBitsSize ) ;
1426
1427 memset( info , 0 , sizeof( BITMAPINFOHEADER ) ) ;
1428
1429 info->bmiHeader.biSize = sizeof( BITMAPINFOHEADER ) ;
1430 info->bmiHeader.biWidth = bmp.GetWidth() ;
1431 info->bmiHeader.biHeight = bmp.GetHeight() ;
1432 info->bmiHeader.biPlanes = 1 ;
1433 info->bmiHeader.biBitCount = 8 ;
1434 info->bmiHeader.biCompression = BI_RGB ;
1435
1436 HDC display = GetDC( NULL ) ;
1437 if ( GetDIBits( display , (HBITMAP) bmp.GetHBITMAP( ) , 0 , bmp.GetHeight() , bits , info , DIB_RGB_COLORS ) )
1438 {
1439 success = (GDI_ERROR != StretchDIBits( (HDC) m_hDC,
1440 xdest1, ydest1, bmp.GetWidth(), bmp.GetHeight() ,
1441 xsrc1 , ysrc1 ,bmp.GetWidth(), bmp.GetHeight() ,
1442 bits , info , DIB_RGB_COLORS , SRCCOPY )) ;
1443 }
1444 else
1445 success = FALSE;
1446 ReleaseDC( NULL , display ) ;
1447 free ( bits ) ;
1448 free( info ) ;
1449 }
1450 else // Not masked, not printer, not pixel copy
1451 {
1452 success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height, (HDC) source->m_hDC,
1453 xsrc1, ysrc1, dwRop) != 0);
1454 }
1455 ::SetTextColor(GetHdc(), old_textground);
1456 ::SetBkColor(GetHdc(), old_background);
1457
1458 return success;
1459 }
1460
1461 void wxDC::DoGetSize(int *w, int *h) const
1462 {
1463 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1464 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1465 }
1466
1467 void wxDC::DoGetSizeMM(int *w, int *h) const
1468 {
1469 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1470 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1471 }
1472
1473 wxSize wxDC::GetPPI() const
1474 {
1475 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1476 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1477
1478 return wxSize(x, y);
1479 }
1480
1481 // For use by wxWindows only, unless custom units are required.
1482 void wxDC::SetLogicalScale(double x, double y)
1483 {
1484 m_logicalScaleX = x;
1485 m_logicalScaleY = y;
1486 }
1487
1488 #if WXWIN_COMPATIBILITY
1489 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1490 float *descent, float *externalLeading,
1491 wxFont *theFont, bool use16bit) const
1492 {
1493 wxCoord x1, y1, descent1, externalLeading1;
1494 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1495 *x = x1; *y = y1;
1496 if (descent)
1497 *descent = descent1;
1498 if (externalLeading)
1499 *externalLeading = externalLeading1;
1500 }
1501 #endif
1502
1503 // ---------------------------------------------------------------------------
1504 // spline drawing code
1505 // ---------------------------------------------------------------------------
1506
1507 #if wxUSE_SPLINES
1508
1509 class wxSpline: public wxObject
1510 {
1511 public:
1512 int type;
1513 wxList *points;
1514
1515 wxSpline(wxList *list);
1516 void DeletePoints();
1517
1518 // Doesn't delete points
1519 ~wxSpline();
1520 };
1521
1522 void wx_draw_open_spline(wxDC *dc, wxSpline *spline);
1523
1524 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1525 double a3, double b3, double a4, double b4);
1526 void wx_clear_stack();
1527 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1528 double *y3, double *x4, double *y4);
1529 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1530 double x4, double y4);
1531 static bool wx_spline_add_point(double x, double y);
1532 static void wx_spline_draw_point_array(wxDC *dc);
1533 wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3);
1534
1535 void wxDC::DoDrawSpline(wxList *list)
1536 {
1537 wxSpline spline(list);
1538
1539 wx_draw_open_spline(this, &spline);
1540 }
1541
1542 wxList wx_spline_point_list;
1543
1544 void wx_draw_open_spline(wxDC *dc, wxSpline *spline)
1545 {
1546 wxPoint *p;
1547 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1548 double x1, y1, x2, y2;
1549
1550 wxNode *node = spline->points->First();
1551 p = (wxPoint *)node->Data();
1552
1553 x1 = p->x;
1554 y1 = p->y;
1555
1556 node = node->Next();
1557 p = (wxPoint *)node->Data();
1558
1559 x2 = p->x;
1560 y2 = p->y;
1561 cx1 = (double)((x1 + x2) / 2);
1562 cy1 = (double)((y1 + y2) / 2);
1563 cx2 = (double)((cx1 + x2) / 2);
1564 cy2 = (double)((cy1 + y2) / 2);
1565
1566 wx_spline_add_point(x1, y1);
1567
1568 while ((node = node->Next()) != NULL)
1569 {
1570 p = (wxPoint *)node->Data();
1571 x1 = x2;
1572 y1 = y2;
1573 x2 = p->x;
1574 y2 = p->y;
1575 cx4 = (double)(x1 + x2) / 2;
1576 cy4 = (double)(y1 + y2) / 2;
1577 cx3 = (double)(x1 + cx4) / 2;
1578 cy3 = (double)(y1 + cy4) / 2;
1579
1580 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1581
1582 cx1 = cx4;
1583 cy1 = cy4;
1584 cx2 = (double)(cx1 + x2) / 2;
1585 cy2 = (double)(cy1 + y2) / 2;
1586 }
1587
1588 wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1));
1589 wx_spline_add_point(x2, y2);
1590
1591 wx_spline_draw_point_array(dc);
1592
1593 }
1594
1595 /********************* CURVES FOR SPLINES *****************************
1596
1597 The following spline drawing routine is from
1598
1599 "An Algorithm for High-Speed Curve Generation"
1600 by George Merrill Chaikin,
1601 Computer Graphics and Image Processing, 3, Academic Press,
1602 1974, 346-349.
1603
1604 and
1605
1606 "On Chaikin's Algorithm" by R. F. Riesenfeld,
1607 Computer Graphics and Image Processing, 4, Academic Press,
1608 1975, 304-310.
1609
1610 ***********************************************************************/
1611
1612 #define half(z1, z2) ((z1+z2)/2.0)
1613 #define THRESHOLD 5
1614
1615 /* iterative version */
1616
1617 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1618 double b4)
1619 {
1620 register double xmid, ymid;
1621 double x1, y1, x2, y2, x3, y3, x4, y4;
1622
1623 wx_clear_stack();
1624 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1625
1626 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1627 xmid = (double)half(x2, x3);
1628 ymid = (double)half(y2, y3);
1629 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1630 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1631 wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1));
1632 wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid));
1633 } else {
1634 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1635 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1636 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1637 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1638 }
1639 }
1640 }
1641
1642
1643 /* utilities used by spline drawing routines */
1644
1645
1646 typedef struct wx_spline_stack_struct {
1647 double x1, y1, x2, y2, x3, y3, x4, y4;
1648 }
1649 Stack;
1650
1651 #define SPLINE_STACK_DEPTH 20
1652 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
1653 static Stack *wx_stack_top;
1654 static int wx_stack_count;
1655
1656 void wx_clear_stack()
1657 {
1658 wx_stack_top = wx_spline_stack;
1659 wx_stack_count = 0;
1660 }
1661
1662 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1663 {
1664 wx_stack_top->x1 = x1;
1665 wx_stack_top->y1 = y1;
1666 wx_stack_top->x2 = x2;
1667 wx_stack_top->y2 = y2;
1668 wx_stack_top->x3 = x3;
1669 wx_stack_top->y3 = y3;
1670 wx_stack_top->x4 = x4;
1671 wx_stack_top->y4 = y4;
1672 wx_stack_top++;
1673 wx_stack_count++;
1674 }
1675
1676 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1677 double *x3, double *y3, double *x4, double *y4)
1678 {
1679 if (wx_stack_count == 0)
1680 return (0);
1681 wx_stack_top--;
1682 wx_stack_count--;
1683 *x1 = wx_stack_top->x1;
1684 *y1 = wx_stack_top->y1;
1685 *x2 = wx_stack_top->x2;
1686 *y2 = wx_stack_top->y2;
1687 *x3 = wx_stack_top->x3;
1688 *y3 = wx_stack_top->y3;
1689 *x4 = wx_stack_top->x4;
1690 *y4 = wx_stack_top->y4;
1691 return (1);
1692 }
1693
1694 static bool wx_spline_add_point(double x, double y)
1695 {
1696 wxPoint *point = new wxPoint;
1697 point->x = (int) x;
1698 point->y = (int) y;
1699 wx_spline_point_list.Append((wxObject*)point);
1700 return TRUE;
1701 }
1702
1703 static void wx_spline_draw_point_array(wxDC *dc)
1704 {
1705 dc->DrawLines(&wx_spline_point_list, 0, 0);
1706 wxNode *node = wx_spline_point_list.First();
1707 while (node)
1708 {
1709 wxPoint *point = (wxPoint *)node->Data();
1710 delete point;
1711 delete node;
1712 node = wx_spline_point_list.First();
1713 }
1714 }
1715
1716 wxSpline::wxSpline(wxList *list)
1717 {
1718 points = list;
1719 }
1720
1721 wxSpline::~wxSpline()
1722 {
1723 }
1724
1725 void wxSpline::DeletePoints()
1726 {
1727 for(wxNode *node = points->First(); node; node = points->First())
1728 {
1729 wxPoint *point = (wxPoint *)node->Data();
1730 delete point;
1731 delete node;
1732 }
1733 delete points;
1734 }
1735
1736
1737 #endif // wxUSE_SPLINES
1738
wxWidgets (Impactor)