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[wxWidgets.git] / src / mgl / dc.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/mgl/dc.cpp
3 // Purpose: wxDC class
4 // Author: Vaclav Slavik
5 // Created: 2001/03/09
6 // RCS-ID: $Id$
7 // Copyright: (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
8 // Licence: wxWindows licence
9 /////////////////////////////////////////////////////////////////////////////
10
11 // ===========================================================================
12 // declarations
13 // ===========================================================================
14
15 // ---------------------------------------------------------------------------
16 // headers
17 // ---------------------------------------------------------------------------
18
19 // For compilers that support precompilation, includes "wx.h".
20 #include "wx/wxprec.h"
21
22 #ifdef __BORLANDC__
23 #pragma hdrstop
24 #endif
25
26 #ifndef WX_PRECOMP
27 #include "wx/dc.h"
28 #include "wx/dcmemory.h"
29 #include "wx/log.h"
30 #endif
31
32 #include "wx/fontutil.h"
33 #include "wx/encinfo.h"
34 #include "wx/fontmap.h"
35 #include "wx/mgl/private.h"
36
37 #include <string.h>
38 #include <mgraph.hpp>
39
40
41
42 //-----------------------------------------------------------------------------
43 // constants
44 //-----------------------------------------------------------------------------
45
46 const double RAD2DEG = 180.0 / M_PI;
47
48
49 //-----------------------------------------------------------------------------
50 // pens data:
51 //-----------------------------------------------------------------------------
52
53 const ushort STIPPLE_wxDOT = 0x5555/* - - - - - - - -*/;
54 const ushort STIPPLE_wxLONG_DASH = 0xF0F0/* ---- ----*/;
55 const ushort STIPPLE_wxSHORT_DASH = 0xCCCC/*-- -- -- -- */;
56 const ushort STIPPLE_wxDOT_DASH = 0x3939/* --- - --- -*/;
57 const ushort STIPPLE_wxSOLID = 0xFFFF/*----------------*/;
58
59 #define PATTERN_ROW(b7,b6,b5,b4,b3,b2,b1,b0) \
60 ((b7 << 7) | (b6 << 6) | (b5 << 5) | (b4 << 4) | \
61 (b3 << 3) | (b2 << 2) | (b1 << 1) | b0)
62
63 static pattern_t PATTERN_wxFDIAGONAL_HATCH = {{
64 PATTERN_ROW(1,0,0,0,0,0,0,0),
65 PATTERN_ROW(0,1,0,0,0,0,0,0),
66 PATTERN_ROW(0,0,1,0,0,0,0,0),
67 PATTERN_ROW(0,0,0,1,0,0,0,0),
68 PATTERN_ROW(0,0,0,0,1,0,0,0),
69 PATTERN_ROW(0,0,0,0,0,1,0,0),
70 PATTERN_ROW(0,0,0,0,0,0,1,0),
71 PATTERN_ROW(0,0,0,0,0,0,0,1),
72 }};
73
74 static pattern_t PATTERN_wxCROSSDIAG_HATCH = {{
75 PATTERN_ROW(1,0,0,0,0,0,0,1),
76 PATTERN_ROW(0,1,0,0,0,0,1,0),
77 PATTERN_ROW(0,0,1,0,0,1,0,0),
78 PATTERN_ROW(0,0,0,1,1,0,0,0),
79 PATTERN_ROW(0,0,0,1,1,0,0,0),
80 PATTERN_ROW(0,0,1,0,0,1,0,0),
81 PATTERN_ROW(0,1,0,0,0,0,1,0),
82 PATTERN_ROW(1,0,0,0,0,0,0,1),
83 }};
84
85 static pattern_t PATTERN_wxBDIAGONAL_HATCH = {{
86 PATTERN_ROW(0,0,0,0,0,0,0,1),
87 PATTERN_ROW(0,0,0,0,0,0,1,0),
88 PATTERN_ROW(0,0,0,0,0,1,0,0),
89 PATTERN_ROW(0,0,0,0,1,0,0,0),
90 PATTERN_ROW(0,0,0,1,0,0,0,0),
91 PATTERN_ROW(0,0,1,0,0,0,0,0),
92 PATTERN_ROW(0,1,0,0,0,0,0,0),
93 PATTERN_ROW(1,0,0,0,0,0,0,0),
94 }};
95
96 static pattern_t PATTERN_wxCROSS_HATCH = {{
97 PATTERN_ROW(0,0,0,1,0,0,0,0),
98 PATTERN_ROW(0,0,0,1,0,0,0,0),
99 PATTERN_ROW(0,0,0,1,0,0,0,0),
100 PATTERN_ROW(1,1,1,1,1,1,1,1),
101 PATTERN_ROW(0,0,0,1,0,0,0,0),
102 PATTERN_ROW(0,0,0,1,0,0,0,0),
103 PATTERN_ROW(0,0,0,1,0,0,0,0),
104 PATTERN_ROW(0,0,0,1,0,0,0,0),
105 }};
106
107 static pattern_t PATTERN_wxHORIZONTAL_HATCH = {{
108 PATTERN_ROW(0,0,0,0,0,0,0,0),
109 PATTERN_ROW(0,0,0,0,0,0,0,0),
110 PATTERN_ROW(0,0,0,0,0,0,0,0),
111 PATTERN_ROW(1,1,1,1,1,1,1,1),
112 PATTERN_ROW(0,0,0,0,0,0,0,0),
113 PATTERN_ROW(0,0,0,0,0,0,0,0),
114 PATTERN_ROW(0,0,0,0,0,0,0,0),
115 PATTERN_ROW(0,0,0,0,0,0,0,0),
116 }};
117
118 static pattern_t PATTERN_wxVERTICAL_HATCH = {{
119 PATTERN_ROW(0,0,0,1,0,0,0,0),
120 PATTERN_ROW(0,0,0,1,0,0,0,0),
121 PATTERN_ROW(0,0,0,1,0,0,0,0),
122 PATTERN_ROW(0,0,0,1,0,0,0,0),
123 PATTERN_ROW(0,0,0,1,0,0,0,0),
124 PATTERN_ROW(0,0,0,1,0,0,0,0),
125 PATTERN_ROW(0,0,0,1,0,0,0,0),
126 PATTERN_ROW(0,0,0,1,0,0,0,0),
127 }};
128
129 #undef PATTERN_ROW
130
131 //-----------------------------------------------------------------------------
132 // wxDC
133 //-----------------------------------------------------------------------------
134
135 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
136
137 // Default constructor
138 wxDC::wxDC()
139 {
140 m_isMemDC = false;
141 m_MGLDC = NULL;
142 m_OwnsMGLDC = false;
143 m_ok = false; // must call SetMGLDevCtx() before using it
144
145 m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
146 (double)wxGetDisplaySizeMM().GetWidth();
147 m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
148 (double)wxGetDisplaySizeMM().GetHeight();
149
150 m_pen = *wxBLACK_PEN;
151 m_font = *wxNORMAL_FONT;
152 m_brush = *wxWHITE_BRUSH;
153 m_penOfsX = m_penOfsY = 0;
154
155 m_penSelected = m_brushSelected = false;
156 m_downloadedPatterns[0] = m_downloadedPatterns[1] = false;
157
158 m_mglFont = NULL;
159 }
160
161
162 wxDC::~wxDC()
163 {
164 if (m_OwnsMGLDC)
165 delete m_MGLDC;
166 }
167
168 void wxDC::SetMGLDC(MGLDevCtx *mgldc, bool OwnsMGLDC)
169 {
170 if ( m_OwnsMGLDC && m_MGLDC )
171 delete m_MGLDC;
172 m_MGLDC = mgldc;
173 m_OwnsMGLDC = OwnsMGLDC;
174 m_ok = true;
175
176 if ( !m_globalClippingRegion.IsNull() )
177 SetClippingRegion(m_globalClippingRegion);
178
179 InitializeMGLDC();
180 }
181
182 void wxDC::InitializeMGLDC()
183 {
184 if ( GetDepth() > 8 )
185 {
186 wxCurrentDCSwitcher switcher(m_MGLDC); // will go away with MGL6
187 m_MGLDC->setFontBlendMode(MGL_AA_RGBBLEND);
188 }
189 }
190
191
192 // ---------------------------------------------------------------------------
193 // clipping
194 // ---------------------------------------------------------------------------
195
196
197 #define DO_SET_CLIPPING_BOX(rg) \
198 { \
199 wxRect rect = rg.GetBox(); \
200 m_clipX1 = (wxCoord) XDEV2LOG(rect.GetLeft()); \
201 m_clipY1 = (wxCoord) YDEV2LOG(rect.GetTop()); \
202 m_clipX2 = (wxCoord) XDEV2LOG(rect.GetRight()); \
203 m_clipY2 = (wxCoord) YDEV2LOG(rect.GetBottom()); \
204 }
205
206 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
207 {
208 wxCHECK_RET( IsOk(), wxT("invalid dc") );
209
210 wxRect rect(XLOG2DEV(cx), YLOG2DEV(cy), XLOG2DEVREL(cw), YLOG2DEVREL(ch));
211
212 if ( !m_currentClippingRegion.IsNull() )
213 m_currentClippingRegion.Intersect(rect);
214 else
215 m_currentClippingRegion.Union(rect);
216
217 m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
218
219 m_clipping = true;
220 DO_SET_CLIPPING_BOX(m_currentClippingRegion)
221 }
222
223 void wxDC::DoSetDeviceClippingRegion(const wxRegion& region)
224 {
225 wxCHECK_RET( IsOk(), wxT("invalid dc") );
226
227 if ( region.IsEmpty() )
228 {
229 DestroyClippingRegion();
230 return;
231 }
232
233 wxRegion rg(region);
234
235 // check if the DC is scaled or moved, and if yes, then
236 // convert rg to device coordinates:
237 if ( m_deviceOriginX != 0 || m_deviceOriginY != 0 ||
238 m_logicalOriginX != 0 || m_logicalOriginY != 0 ||
239 XLOG2DEVREL(500) != 500 || YLOG2DEVREL(500) != 500 )
240 {
241 region_t *mrg = rg.GetMGLRegion().rgnPointer();
242 span_t *s;
243 segment_t *p;
244 for (s = mrg->spans; s; s = s->next)
245 {
246 s->y = YLOG2DEV(s->y);
247 for (p = s->seg; p; p = p->next)
248 p->x = XLOG2DEV(p->x);
249 }
250 }
251
252 if ( !m_currentClippingRegion.IsNull() )
253 m_currentClippingRegion.Intersect(rg);
254 else
255 m_currentClippingRegion.Union(rg);
256
257 m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
258
259 m_clipping = true;
260 DO_SET_CLIPPING_BOX(m_currentClippingRegion)
261 }
262
263 void wxDC::DestroyClippingRegion()
264 {
265 wxCHECK_RET( IsOk(), wxT("invalid dc") );
266
267 if ( !m_globalClippingRegion.IsNull() )
268 {
269 m_MGLDC->setClipRegion(m_globalClippingRegion.GetMGLRegion());
270 m_currentClippingRegion = m_globalClippingRegion;
271 m_clipping = true;
272 }
273 else
274 {
275 m_MGLDC->setClipRect(MGLRect(0, 0, m_MGLDC->sizex()+1, m_MGLDC->sizey()+1));
276 ResetClipping();
277 m_currentClippingRegion.Clear();
278 }
279 }
280
281 // ---------------------------------------------------------------------------
282 // query capabilities
283 // ---------------------------------------------------------------------------
284
285 bool wxDC::CanDrawBitmap() const
286 {
287 return true;
288 }
289
290 bool wxDC::CanGetTextExtent() const
291 {
292 return true;
293 }
294
295 int wxDC::GetDepth() const
296 {
297 return m_MGLDC->getBitsPerPixel();
298 }
299
300 // ---------------------------------------------------------------------------
301 // drawing
302 // ---------------------------------------------------------------------------
303
304 void wxDC::Clear()
305 {
306 wxCHECK_RET( IsOk(), wxT("invalid dc") );
307
308 m_MGLDC->makeCurrent(); // will go away with MGL6.0
309 if ( m_backgroundBrush.GetStyle() != wxTRANSPARENT )
310 {
311 int w, h;
312 wxBrush oldb = m_brush;
313 SetBrush(m_backgroundBrush);
314 SelectBrush();
315 GetSize(&w, &h);
316 m_MGLDC->fillRect(0, 0, w, h);
317 SetBrush(oldb);
318 }
319 }
320
321 extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
322 const wxColour & col, wxFloodFillStyle style);
323
324 bool wxDC::DoFloodFill(wxCoord x, wxCoord y,
325 const wxColour& col, wxFloodFillStyle style)
326 {
327 return wxDoFloodFill(this, x, y, col, style);
328 }
329
330 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
331 {
332 wxCHECK_MSG( col, false, wxT("NULL colour parameter in wxDC::GetPixel"));
333
334 uchar r, g, b;
335 m_MGLDC->unpackColorFast(m_MGLDC->getPixel(XLOG2DEV(x), YLOG2DEV(y)),
336 r, g, b);
337 col->Set(r, g, b);
338 return true;
339 }
340
341 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
342 {
343 wxCHECK_RET( IsOk(), wxT("invalid dc") );
344
345 if ( m_pen.GetStyle() != wxTRANSPARENT )
346 {
347 int w = 0;
348 int h = 0;
349 GetSize(&w, &h);
350 m_MGLDC->makeCurrent(); // will go away with MGL6.0
351 if ( !m_penSelected )
352 SelectPen();
353 wxCoord xx = XLOG2DEV(x);
354 wxCoord yy = YLOG2DEV(y);
355 m_MGLDC->line(m_penOfsX, yy + m_penOfsY, w-1 + m_penOfsX, yy + m_penOfsY);
356 m_MGLDC->line(xx + m_penOfsX, m_penOfsY, x + m_penOfsX, h-1 + m_penOfsY);
357 CalcBoundingBox(0, 0);
358 CalcBoundingBox(w, h);
359 }
360 }
361
362 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
363 {
364 wxCHECK_RET( IsOk(), wxT("invalid dc") );
365
366 if ( m_pen.GetStyle() != wxTRANSPARENT )
367 {
368 m_MGLDC->makeCurrent(); // will go away with MGL6.0
369 if ( !m_penSelected )
370 SelectPen();
371 m_MGLDC->lineExt(XLOG2DEV(x1) + m_penOfsX, YLOG2DEV(y1) + m_penOfsY,
372 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY,FALSE);
373 CalcBoundingBox(x1, y1);
374 CalcBoundingBox(x2, y2);
375 }
376 }
377
378 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
379 // and ending at (x2, y2)
380 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
381 wxCoord x2, wxCoord y2,
382 wxCoord xc, wxCoord yc)
383 {
384 wxCHECK_RET( IsOk(), wxT("invalid dc") );
385
386 wxCoord xx1 = XLOG2DEV(x1);
387 wxCoord yy1 = YLOG2DEV(y1);
388 wxCoord xx2 = XLOG2DEV(x2);
389 wxCoord yy2 = YLOG2DEV(y2);
390 wxCoord xxc = XLOG2DEV(xc);
391 wxCoord yyc = YLOG2DEV(yc);
392 double dx = xx1 - xxc;
393 double dy = yy1 - yyc;
394 double radius = sqrt((double)(dx*dx+dy*dy));
395 wxCoord r = (wxCoord)radius;
396 double radius1, radius2;
397
398
399 if (xx1 == xx2 && yy1 == yy2)
400 {
401 radius1 = 0.0;
402 radius2 = 360.0;
403 }
404 else if (radius == 0.0)
405 {
406 radius1 = radius2 = 0.0;
407 }
408 else
409 {
410 radius1 = (xx1 - xxc == 0) ?
411 (yy1 - yyc < 0) ? 90.0 : -90.0 :
412 -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
413 radius2 = (xx2 - xxc == 0) ?
414 (yy2 - yyc < 0) ? 90.0 : -90.0 :
415 -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
416 }
417 wxCoord alpha1 = wxCoord(radius1);
418 wxCoord alpha2 = alpha1 + wxCoord(radius2 - radius1);
419 while (alpha2 <= 0) alpha2 += 360;
420 while (alpha1 > 360) alpha1 -= 360;
421
422 m_MGLDC->makeCurrent(); // will go away with MGL6.0
423 if ( m_brush.GetStyle() != wxTRANSPARENT )
424 {
425 if ( !m_brushSelected )
426 SelectBrush();
427 m_MGLDC->fillEllipseArc(xxc, yyc, r, r, alpha1, alpha2);
428 }
429
430 if ( m_pen.GetStyle() != wxTRANSPARENT )
431 {
432 if ( !m_penSelected )
433 SelectPen();
434 m_MGLDC->ellipseArc(xxc + m_penOfsX, yyc + m_penOfsY, r, r, alpha1, alpha2);
435 }
436
437 CalcBoundingBox(xc - r, yc - r);
438 CalcBoundingBox(xc + r, yc + r);
439 }
440
441 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
442 {
443 wxCHECK_RET( IsOk(), wxT("invalid dc") );
444
445 if ( m_pen.GetStyle() != wxTRANSPARENT )
446 {
447 m_MGLDC->makeCurrent(); // will go away with MGL6.0
448 if ( !m_penSelected )
449 SelectPen();
450 m_MGLDC->pixel(XLOG2DEV(x), YLOG2DEV(y));
451 CalcBoundingBox(x, y);
452 }
453 }
454
455 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,wxPolygonFillMode WXUNUSED(fillStyle))
456 {
457 wxCHECK_RET( IsOk(), wxT("invalid dc") );
458
459 wxCoord xxoffset = XLOG2DEVREL(xoffset),
460 yyoffset = YLOG2DEVREL(yoffset);
461 MGLPoint *cpoints = new MGLPoint[n+1];
462 for (int i = 0; i < n; i++)
463 {
464 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
465 cpoints[i].x = (int)(XLOG2DEV(points[i].x));
466 cpoints[i].y = (int)(YLOG2DEV(points[i].y));
467 }
468 cpoints[n] = cpoints[0];
469
470 m_MGLDC->makeCurrent(); // will go away with MGL6.0
471 if ( m_brush.GetStyle() != wxTRANSPARENT )
472 {
473 if ( !m_brushSelected )
474 SelectBrush();
475 m_MGLDC->fillPolygon(n, cpoints, xxoffset, yyoffset);
476 }
477
478 if ( m_pen.GetStyle() != wxTRANSPARENT )
479 {
480 if ( !m_penSelected )
481 SelectPen();
482 if (m_penOfsX != 0 || m_penOfsY != 0)
483 {
484 for (int i = 0; i <= n; i++)
485 {
486 cpoints[i].x += m_penOfsX;
487 cpoints[i].y += m_penOfsY;
488 }
489 }
490 m_MGLDC->polyLine(n+1, cpoints);
491 }
492
493 delete[] cpoints;
494 }
495
496 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
497 {
498 wxCHECK_RET( IsOk(), wxT("invalid dc") );
499
500 if ( m_pen.GetStyle() != wxTRANSPARENT )
501 {
502 MGLPoint *cpoints = new MGLPoint[n];
503 m_MGLDC->makeCurrent(); // will go away with MGL6.0
504 if ( !m_penSelected )
505 SelectPen();
506 for (int i = 0; i < n; i++)
507 {
508 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
509 cpoints[i].x = (int)(XLOG2DEV(points[i].x + xoffset) /*+ m_penOfsX*/);
510 cpoints[i].y = (int)(YLOG2DEV(points[i].y + yoffset) /*+ m_penOfsY*/);
511 }
512 m_MGLDC->polyLine(n, cpoints);
513 delete[] cpoints;
514 }
515 }
516
517 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
518 {
519 wxCHECK_RET( IsOk(), wxT("invalid dc") );
520
521 wxCoord xx = XLOG2DEV(x);
522 wxCoord yy = YLOG2DEV(y);
523 wxCoord ww = m_signX * XLOG2DEVREL(width);
524 wxCoord hh = m_signY * YLOG2DEVREL(height);
525
526 if ( ww == 0 || hh == 0 ) return;
527
528 if ( ww < 0 )
529 {
530 ww = -ww;
531 xx = xx - ww;
532 }
533 if ( hh < 0 )
534 {
535 hh = -hh;
536 yy = yy - hh;
537 }
538
539 m_MGLDC->makeCurrent(); // will go away with MGL6.0
540 if ( m_brush.GetStyle() != wxTRANSPARENT )
541 {
542 if ( !m_brushSelected )
543 SelectBrush();
544 m_MGLDC->fillRect(xx, yy, xx + ww, yy + hh);
545 }
546
547 if ( m_pen.GetStyle() != wxTRANSPARENT )
548 {
549 if ( !m_penSelected )
550 SelectPen();
551
552 m_MGLDC->rect(xx + m_penOfsX, yy + m_penOfsY,
553 xx + ww + m_penOfsX, yy + hh + m_penOfsY);
554 }
555
556 CalcBoundingBox(x, y);
557 CalcBoundingBox(x + width, y + height);
558 }
559
560 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
561 {
562 wxCHECK_RET( IsOk(), wxT("invalid dc") );
563
564 if ( radius < 0.0 )
565 radius = -radius * ((width < height) ? width : height);
566
567 wxCoord xx = XLOG2DEV(x);
568 wxCoord yy = YLOG2DEV(y);
569 wxCoord ww = m_signX * XLOG2DEVREL(width);
570 wxCoord hh = m_signY * YLOG2DEVREL(height);
571 wxCoord rr = XLOG2DEVREL((wxCoord)radius);
572
573 // CMB: handle -ve width and/or height
574 if ( ww < 0 )
575 {
576 ww = -ww;
577 xx = xx - ww;
578 }
579 if ( hh < 0 )
580 {
581 hh = -hh;
582 yy = yy - hh;
583 }
584
585 // CMB: if radius is zero use DrawRectangle() instead to avoid
586 // X drawing errors with small radii
587 if ( rr == 0 )
588 {
589 DrawRectangle(x, y, width, height);
590 return;
591 }
592
593 // CMB: draw nothing if transformed w or h is 0
594 if ( ww == 0 || hh == 0 ) return;
595
596 // CMB: ensure dd is not larger than rectangle otherwise we
597 // get an hour glass shape
598 wxCoord dd = 2 * rr;
599 if ( dd > ww ) dd = ww;
600 if ( dd > hh ) dd = hh;
601 rr = dd / 2;
602
603 m_MGLDC->makeCurrent(); // will go away with MGL6.0
604 if ( m_brush.GetStyle() != wxTRANSPARENT )
605 {
606 if (!m_brushSelected)
607 SelectBrush();
608 m_MGLDC->fillRect(xx+rr, yy, xx+ww-rr, yy+hh);
609 m_MGLDC->fillRect(xx, yy+rr, xx+ww, yy+hh-rr);
610 m_MGLDC->fillEllipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
611 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
612 m_MGLDC->fillEllipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
613 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
614 }
615
616 if ( m_pen.GetStyle() != wxTRANSPARENT )
617 {
618 if ( !m_penSelected )
619 SelectPen();
620 xx += m_penOfsX;
621 yy += m_penOfsY;
622 m_MGLDC->line(xx+rr+1, yy, xx+ww-rr, yy);
623 m_MGLDC->ellipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
624 m_MGLDC->line(xx+ww, yy+rr+1, xx+ww, yy+hh-rr);
625 m_MGLDC->ellipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
626 m_MGLDC->line(xx+ww-rr, yy+hh, xx+rr+1, yy+hh);
627 m_MGLDC->ellipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
628 m_MGLDC->line(xx, yy+hh-rr, xx, yy+rr+1);
629 m_MGLDC->ellipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
630 }
631
632 CalcBoundingBox(x, y);
633 CalcBoundingBox(x + width, y + height);
634 }
635
636 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
637 {
638 wxCHECK_RET( IsOk(), wxT("invalid dc") );
639
640 wxCoord x2 = (x+width);
641 wxCoord y2 = (y+height);
642
643 m_MGLDC->makeCurrent(); // will go away with MGL6.0
644 if ( m_brush.GetStyle() != wxTRANSPARENT )
645 {
646 if ( !m_brushSelected )
647 SelectBrush();
648 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
649 m_MGLDC->fillEllipse(rect);
650 }
651
652 if ( m_pen.GetStyle() != wxTRANSPARENT )
653 {
654 if ( !m_penSelected )
655 SelectPen();
656 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
657 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
658 m_MGLDC->ellipse(rect);
659 }
660
661 CalcBoundingBox(x, y);
662 CalcBoundingBox(x2, y2);
663 }
664
665 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
666 {
667 wxCHECK_RET( IsOk(), wxT("invalid dc") );
668
669 wxCoord x2 = (x+w);
670 wxCoord y2 = (y+h);
671
672 m_MGLDC->makeCurrent(); // will go away with MGL6.0
673 if ( m_brush.GetStyle() != wxTRANSPARENT )
674 {
675 if (!m_brushSelected) SelectBrush();
676 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
677 m_MGLDC->fillEllipseArc(rect, (int)sa, (int)ea);
678 }
679
680 if ( m_pen.GetStyle() != wxTRANSPARENT )
681 {
682 if ( !m_penSelected )
683 SelectPen();
684 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
685 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
686 m_MGLDC->ellipseArc(rect, (int)sa, (int)ea);
687 }
688
689 CalcBoundingBox(x, y);
690 CalcBoundingBox(x2, y2);
691 }
692
693 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
694 {
695 m_MGLDC->makeCurrent(); // will go away with MGL6.0
696 DrawAnyText(text, x, y);
697
698 // update the bounding box
699 wxCoord w, h;
700 CalcBoundingBox(x, y);
701 GetTextExtent(text, &w, &h);
702 CalcBoundingBox(x + w, y + h);
703 }
704
705 bool wxDC::SelectMGLFont()
706 {
707 if ( m_mglFont == NULL )
708 {
709 float scale = m_scaleY;
710 bool antialiased = (GetDepth() > 8);
711
712 m_mglFont = m_font.GetMGLfont_t(scale, antialiased);
713 wxCHECK_MSG( m_mglFont, false, wxT("invalid font") );
714
715 m_MGLDC->useFont(m_mglFont);
716 wxLogTrace("mgl_font", "useFont(%p)", m_mglFont);
717
718 #if !wxUSE_UNICODE
719 wxNativeEncodingInfo nativeEnc;
720 wxFontEncoding encoding = m_font.GetEncoding();
721 if ( !wxGetNativeFontEncoding(encoding, &nativeEnc) ||
722 !wxTestFontEncoding(nativeEnc) )
723 {
724 #if wxUSE_FONTMAP
725 if ( !wxFontMapper::Get()->GetAltForEncoding(encoding, &nativeEnc) )
726 #endif
727 {
728 nativeEnc.mglEncoding = MGL_ENCODING_ASCII;
729 }
730 }
731 m_MGLDC->setTextEncoding(nativeEnc.mglEncoding);
732 #endif
733 }
734 return true;
735 }
736
737 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
738 {
739 wxCHECK_RET( IsOk(), wxT("invalid dc") );
740
741 SelectMGLFont();
742
743 // Render the text:
744 wxCoord xx = XLOG2DEV(x);
745 wxCoord yy = YLOG2DEV(y);
746
747 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
748 m_MGLDC->setLineStipple(0xFFFF);
749 m_MGLDC->setPenSize(1, 1);
750 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
751
752 #if wxUSE_UNICODE
753 const wchar_t *c_text = text.c_str();
754 #else
755 const char *c_text = text.c_str();
756 #endif
757
758 #if 1
759 // FIXME_MGL - this is a temporary hack in absence of proper
760 // implementation of solid text background in MGL. Once
761 // the bug in MGL is fixed, this code should be nuked
762 // immediately. Note that the code is not 100% correct;
763 // it only works with wxCOPY logical function
764 if ( m_backgroundMode == wxSOLID )
765 {
766 int w = m_MGLDC->textWidth(c_text);
767 int h = m_MGLDC->textHeight();
768 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
769 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
770 m_MGLDC->fillRect(xx, yy, xx+w, yy+h);
771 }
772 #endif
773
774 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textForegroundColour.Red(),
775 m_textForegroundColour.Green(), m_textForegroundColour.Blue()));
776 m_MGLDC->setBackColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
777 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
778
779 m_MGLDC->drawStr(xx, yy, c_text);
780
781 // Render underline:
782 if ( m_font.GetUnderlined() )
783 {
784 int x1 = xx, y1 = yy;
785 int x2 = 0 , y2 = 0;
786 int w = m_MGLDC->textWidth(c_text);
787 m_MGLDC->underScoreLocation(x1, y1, c_text);
788 switch (m_MGLDC->getTextDirection())
789 {
790 case MGL_RIGHT_DIR: x2 = x1 + w, y2 = y1; break;
791 case MGL_LEFT_DIR: x2 = x1 - w, y2 = y1; break;
792 case MGL_UP_DIR: x2 = x1, y2 = y1 - w; break;
793 case MGL_DOWN_DIR: x2 = x1, y2 = y1 + w; break;
794 }
795 m_MGLDC->line(x1, y1, x2, y2);
796 }
797
798 m_penSelected = m_brushSelected = false;
799 }
800
801 void wxDC::DoDrawRotatedText(const wxString& text,
802 wxCoord x, wxCoord y,
803 double angle)
804 {
805 m_MGLDC->makeCurrent(); // will go away with MGL6.0
806
807 if ( angle == 0 )
808 {
809 DoDrawText(text, x, y);
810 return;
811 }
812 else if ( angle == 90.0 )
813 m_MGLDC->setTextDirection(MGL_UP_DIR);
814 else if ( angle == 180.0 )
815 m_MGLDC->setTextDirection(MGL_LEFT_DIR);
816 else if ( angle == 270.0 )
817 m_MGLDC->setTextDirection(MGL_DOWN_DIR);
818 else
819 {
820 // FIXME_MGL -- implement once MGL supports it
821 wxFAIL_MSG(wxT("wxMGL only supports rotated text with angle 0,90,180 or 270"));
822 return;
823 }
824
825 DrawAnyText(text, x, y);
826
827 // Restore default:
828 m_MGLDC->setTextDirection(MGL_RIGHT_DIR);
829 }
830
831 // ---------------------------------------------------------------------------
832 // set GDI objects
833 // ---------------------------------------------------------------------------
834
835 void wxDC::SelectMGLStipplePen(int style)
836 {
837 ushort stipple;
838
839 switch (style)
840 {
841 case wxDOT: stipple = STIPPLE_wxDOT; break;
842 case wxLONG_DASH: stipple = STIPPLE_wxLONG_DASH; break;
843 case wxSHORT_DASH: stipple = STIPPLE_wxSHORT_DASH; break;
844 case wxDOT_DASH: stipple = STIPPLE_wxDOT_DASH; break;
845 default: stipple = STIPPLE_wxSOLID; break;
846 }
847
848 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
849 m_MGLDC->setLineStipple(stipple);
850 m_MGLDC->setPenSize(1, 1);
851 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
852 m_penOfsY = m_penOfsX = 0;
853 }
854
855 // Accepted valus of SelectMGLFatPen's 2nd argument
856 enum {
857 wxMGL_SELECT_FROM_PEN,
858 wxMGL_SELECT_FROM_BRUSH
859 };
860
861 void wxDC::SelectMGLFatPen(int style, int flag)
862 {
863 MGL_penStyleType penstyle;
864 const pattern_t *pattern = NULL;
865 pixpattern24_t *pixPattern = NULL;
866 int wx, wy;
867 int slot;
868
869 // Since MGL pens may be created from wxBrush or wxPen and we often
870 // switch between pens and brushes, we take advantage of MGL's ability
871 // to have multiple (pix)pattern_t's loaded. We always download pen
872 // to 0th slot and brush to 1st slot.
873 if ( flag == wxMGL_SELECT_FROM_PEN )
874 slot = 0;
875 else
876 slot = 1;
877
878 // compute pen's width:
879 if ( m_pen.GetWidth() <= 1 )
880 {
881 wx = wy = 1;
882 m_penOfsX = m_penOfsY = 0;
883 }
884 else
885 {
886 wx = (int)(0.5 + fabs((double) XLOG2DEVREL(m_pen.GetWidth())));
887 wy = (int)(0.5 + fabs((double) YLOG2DEVREL(m_pen.GetWidth())));
888 m_penOfsX = -wx/2;
889 m_penOfsY = -wy/2;
890 }
891
892 // find pen's type:
893 penstyle = MGL_BITMAP_TRANSPARENT;
894 switch (style)
895 {
896 case wxBDIAGONAL_HATCH: pattern = &PATTERN_wxBDIAGONAL_HATCH;
897 penstyle = MGL_BITMAP_TRANSPARENT;
898 break;
899 case wxCROSSDIAG_HATCH: pattern = &PATTERN_wxCROSSDIAG_HATCH;
900 penstyle = MGL_BITMAP_TRANSPARENT;
901 break;
902 case wxFDIAGONAL_HATCH: pattern = &PATTERN_wxFDIAGONAL_HATCH;
903 penstyle = MGL_BITMAP_TRANSPARENT;
904 break;
905 case wxCROSS_HATCH: pattern = &PATTERN_wxCROSS_HATCH;
906 penstyle = MGL_BITMAP_TRANSPARENT;
907 break;
908 case wxHORIZONTAL_HATCH: pattern = &PATTERN_wxHORIZONTAL_HATCH;
909 penstyle = MGL_BITMAP_TRANSPARENT;
910 break;
911 case wxVERTICAL_HATCH: pattern = &PATTERN_wxVERTICAL_HATCH;
912 penstyle = MGL_BITMAP_TRANSPARENT;
913 break;
914
915 case wxSTIPPLE:
916 if ( flag == wxMGL_SELECT_FROM_PEN )
917 pixPattern = (pixpattern24_t*) m_pen.GetPixPattern();
918 else
919 pixPattern = (pixpattern24_t*) m_brush.GetPixPattern();
920 penstyle = MGL_PIXMAP;
921 break;
922
923 case wxSTIPPLE_MASK_OPAQUE:
924 pattern = (pattern_t*) m_brush.GetMaskPattern();
925 penstyle = MGL_BITMAP_OPAQUE;
926 break;
927
928 case wxSOLID:
929 default:
930 penstyle = MGL_BITMAP_SOLID; break;
931 }
932
933 // ...and finally, pass the pen to MGL:
934
935 if ( pattern )
936 {
937 if ( !m_downloadedPatterns[slot] )
938 {
939 m_MGLDC->setPenBitmapPattern(slot, pattern);
940 m_downloadedPatterns[slot] = true;
941 }
942 m_MGLDC->usePenBitmapPattern(slot);
943 }
944
945 if ( pixPattern )
946 {
947 if ( !m_downloadedPatterns[slot] )
948 {
949 pixpattern_t pix;
950 int x, y, c;
951
952 switch (GetDepth())
953 {
954 case 8:
955 for (y = 0; y < 8; y++)
956 for (x = 0; x < 8; x++)
957 pix.b8.p[x][y] = (uchar)m_MGLDC->packColorFast(
958 pixPattern->p[x][y][0],
959 pixPattern->p[x][y][1],
960 pixPattern->p[x][y][2]);
961 break;
962 case 15:
963 case 16:
964 for (y = 0; y < 8; y++)
965 for (x = 0; x < 8; x++)
966 pix.b16.p[x][y] = (M_uint16)m_MGLDC->packColorFast(
967 pixPattern->p[x][y][0],
968 pixPattern->p[x][y][1],
969 pixPattern->p[x][y][2]);
970 break;
971 case 24:
972 for (y = 0; y < 8; y++)
973 for (x = 0; x < 8; x++)
974 for (c = 0; c < 3; c++)
975 pix.b24.p[x][y][c] = pixPattern->p[x][y][c];
976 break;
977 case 32:
978 for (y = 0; y < 8; y++)
979 for (x = 0; x < 8; x++)
980 pix.b32.p[x][y] = m_MGLDC->packColorFast(
981 pixPattern->p[x][y][0],
982 pixPattern->p[x][y][1],
983 pixPattern->p[x][y][2]);
984 break;
985 default:
986 wxFAIL_MSG(wxT("invalid DC depth"));
987 break;
988 }
989 m_MGLDC->setPenPixmapPattern(slot, &pix);
990 m_downloadedPatterns[slot] = true;
991 }
992 m_MGLDC->usePenPixmapPattern(slot);
993 }
994
995 m_MGLDC->setLineStyle(MGL_LINE_PENSTYLE);
996 m_MGLDC->setPenStyle(penstyle);
997 m_MGLDC->setPenSize(wy, wx);
998 }
999
1000 void wxDC::SelectPen()
1001 {
1002 wxCHECK_RET( IsOk(), wxT("invalid dc") );
1003
1004 wxColour& clr = m_pen.GetColour();
1005 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1006 m_MGLDC->setColorRGB(clr.Red(), clr.Green(), clr.Blue());
1007
1008 switch (m_pen.GetStyle())
1009 {
1010 case wxTRANSPARENT:
1011 break;
1012
1013 case wxDOT:
1014 case wxLONG_DASH:
1015 case wxSHORT_DASH:
1016 case wxDOT_DASH:
1017 SelectMGLStipplePen(m_pen.GetStyle());
1018 break;
1019
1020 case wxBDIAGONAL_HATCH:
1021 case wxCROSSDIAG_HATCH:
1022 case wxFDIAGONAL_HATCH:
1023 case wxCROSS_HATCH:
1024 case wxHORIZONTAL_HATCH:
1025 case wxVERTICAL_HATCH:
1026 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1027 break;
1028
1029 case wxSTIPPLE:
1030 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1031 break;
1032
1033 case wxSOLID:
1034 case wxUSER_DASH:
1035 default:
1036 if ( m_pen.GetWidth() <= 1 )
1037 SelectMGLStipplePen(wxSOLID);
1038 else
1039 SelectMGLFatPen(wxSOLID, wxMGL_SELECT_FROM_PEN);
1040 break;
1041 }
1042 m_penSelected = true;
1043 m_brushSelected = false;
1044 }
1045
1046 void wxDC::SelectBrush()
1047 {
1048 wxCHECK_RET( IsOk(), wxT("invalid dc") );
1049
1050 wxColour fg, bg;
1051 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1052
1053 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
1054 {
1055 fg = m_textForegroundColour;
1056 bg = m_textBackgroundColour;
1057 }
1058 else
1059 {
1060 fg = m_brush.GetColour();
1061 bg = m_backgroundBrush.GetColour();
1062 }
1063
1064 m_MGLDC->setColorRGB(fg.Red(), fg.Green(), fg.Blue());
1065 m_MGLDC->setBackColor(m_MGLDC->packColorFast(bg.Red(), bg.Green(), bg.Blue()));
1066 m_penSelected = false;
1067 m_brushSelected = true;
1068
1069 SelectMGLFatPen(m_brush.GetStyle(), wxMGL_SELECT_FROM_BRUSH);
1070 }
1071
1072 void wxDC::SetPen(const wxPen& pen)
1073 {
1074 if ( !pen.IsOk() ) return;
1075 if ( m_pen == pen ) return;
1076 m_pen = pen;
1077 m_penSelected = false;
1078 m_downloadedPatterns[0] = false;
1079 }
1080
1081 void wxDC::SetBrush(const wxBrush& brush)
1082 {
1083 if ( !brush.IsOk() ) return;
1084 if ( m_brush == brush ) return;
1085 m_brush = brush;
1086 m_brushSelected = false;
1087 m_downloadedPatterns[1] = false;
1088 }
1089
1090 void wxDC::SetPalette(const wxPalette& palette)
1091 {
1092 wxCHECK_RET( IsOk(), wxT("invalid dc") );
1093
1094 if ( !palette.IsOk() )
1095 {
1096 if ( m_oldPalette.IsOk() )
1097 SetPalette(m_oldPalette);
1098 return;
1099 }
1100
1101 if ( palette.IsSameAs(m_palette) )
1102 return;
1103
1104 m_oldPalette = m_palette;
1105 m_palette = palette;
1106
1107 int cnt = m_palette.GetColoursCount();
1108 palette_t *pal = m_palette.GetMGLpalette_t();
1109 m_MGLDC->setPalette(pal, cnt, 0);
1110 m_MGLDC->realizePalette(cnt, 0, TRUE);
1111 }
1112
1113 void wxDC::SetFont(const wxFont& font)
1114 {
1115 if ( font.IsOk() )
1116 {
1117 m_font = font;
1118 m_mglFont = NULL;
1119 }
1120 }
1121
1122 void wxDC::SetBackground(const wxBrush& brush)
1123 {
1124 wxCHECK_RET( IsOk(), wxT("invalid dc") );
1125
1126 if (!brush.IsOk()) return;
1127
1128 m_backgroundBrush = brush;
1129 wxColour &clr = m_backgroundBrush.GetColour();
1130 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1131 m_MGLDC->setBackColor(
1132 m_MGLDC->packColorFast(clr.Red(), clr.Green(), clr.Blue()));
1133 }
1134
1135 void wxDC::SetBackgroundMode(int mode)
1136 {
1137 m_backgroundMode = mode;
1138 if ( mode == wxSOLID )
1139 m_MGLDC->setBackMode(MGL_OPAQUE_BACKGROUND);
1140 else
1141 m_MGLDC->setBackMode(MGL_TRANSPARENT_BACKGROUND);
1142 }
1143
1144 void wxDC::SetLogicalFunction(wxRasterOperationMode function)
1145 {
1146 wxCHECK_RET( IsOk(), wxT("invalid dc") );
1147
1148 m_logicalFunction = function;
1149
1150 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1151 m_MGLDC->setWriteMode(LogicalFunctionToMGLRop(m_logicalFunction));
1152 }
1153
1154 int wxDC::LogicalFunctionToMGLRop(int logFunc) const
1155 {
1156 MGL_writeModeType rop;
1157
1158 switch (logFunc)
1159 {
1160 case wxCLEAR: rop = MGL_R2_BLACK; break;
1161 case wxXOR: rop = MGL_R2_XORSRC; break;
1162 case wxINVERT: rop = MGL_R2_NOT; break;
1163 case wxOR_REVERSE: rop = MGL_R2_MERGESRCNOT; break;
1164 case wxAND_REVERSE: rop = MGL_R2_MASKSRCNOT; break;
1165 case wxCOPY: rop = MGL_R2_COPYSRC; break;
1166 case wxAND: rop = MGL_R2_MASKSRC; break;
1167 case wxAND_INVERT: rop = MGL_R2_MASKNOTSRC; break;
1168 case wxNO_OP: rop = MGL_R2_NOP; break;
1169 case wxNOR: rop = MGL_R2_NOTMERGESRC; break;
1170 case wxEQUIV: rop = MGL_R2_NOTXORSRC; break;
1171 case wxSRC_INVERT: rop = MGL_R2_NOTCOPYSRC; break;
1172 case wxOR_INVERT: rop = MGL_R2_MERGENOTSRC; break;
1173 case wxNAND: rop = MGL_R2_NOTMASKSRC; break;
1174 case wxOR: rop = MGL_R2_MERGESRC; break;
1175 case wxSET: rop = MGL_R2_WHITE; break;
1176 default:
1177 wxFAIL_MSG( wxT("unsupported logical function") );
1178 return MGL_REPLACE_MODE;
1179 }
1180 return (int)rop;
1181 }
1182
1183 bool wxDC::StartDoc(const wxString& WXUNUSED(message))
1184 {
1185 // We might be previewing, so return true to let it continue.
1186 return true;
1187 }
1188
1189 void wxDC::EndDoc()
1190 {
1191 }
1192
1193 void wxDC::StartPage()
1194 {
1195 }
1196
1197 void wxDC::EndPage()
1198 {
1199 }
1200
1201 // ---------------------------------------------------------------------------
1202 // text metrics
1203 // ---------------------------------------------------------------------------
1204
1205 wxCoord wxDC::GetCharHeight() const
1206 {
1207 wxCurrentDCSwitcher switcher(m_MGLDC);
1208 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1209 return YDEV2LOGREL(m_mglFont->fontHeight);
1210 }
1211
1212 wxCoord wxDC::GetCharWidth() const
1213 {
1214 wxCurrentDCSwitcher switcher(m_MGLDC);
1215 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1216 // VS: wxT() is intentional, charWidth() has both char and wchar_t version
1217 // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
1218 // scaled according to m_scaleY
1219 return YDEV2LOGREL(m_mglFont->fontWidth);
1220 }
1221
1222 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1223 wxCoord *descent, wxCoord *externalLeading,
1224 const wxFont *theFont) const
1225 {
1226 wxFont oldFont;
1227
1228 if ( theFont != NULL )
1229 {
1230 oldFont = m_font;
1231 wxConstCast(this, wxDC)->SetFont(*theFont);
1232 }
1233
1234 wxCurrentDCSwitcher switcher(m_MGLDC);
1235 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return;
1236
1237 if ( x )
1238 // VS: YDEV is corrent, it should *not* be XDEV, because font's are
1239 // only scaled according to m_scaleY
1240 *x = YDEV2LOGREL(m_MGLDC->textWidth(string.wc_str()));
1241 if ( y )
1242 *y = YDEV2LOGREL(m_MGLDC->textHeight());
1243 if ( descent )
1244 *descent = YDEV2LOGREL(m_mglFont->descent);
1245 if ( externalLeading )
1246 *externalLeading = YDEV2LOGREL(m_mglFont->leading);
1247
1248 if ( theFont != NULL )
1249 wxConstCast(this, wxDC)->SetFont(oldFont);
1250 }
1251
1252
1253 // ---------------------------------------------------------------------------
1254 // mapping modes
1255 // ---------------------------------------------------------------------------
1256
1257 void wxDC::ComputeScaleAndOrigin()
1258 {
1259 double newX = m_logicalScaleX * m_userScaleX;
1260 double newY = m_logicalScaleY * m_userScaleY;
1261
1262 // make sure font will be reloaded before drawing:
1263 if ( newY != m_scaleY )
1264 m_mglFont = NULL;
1265 // make sure m_penOfs{X,Y} will be reevaluated before drawing:
1266 if ( newY != m_scaleY || newX != m_scaleX )
1267 m_penSelected = false;
1268
1269 m_scaleX = newX, m_scaleY = newY;
1270 }
1271
1272 void wxDC::DoGetSize(int *w, int *h) const
1273 {
1274 if (w) *w = m_MGLDC->sizex()+1;
1275 if (h) *h = m_MGLDC->sizey()+1;
1276 }
1277
1278 void wxDC::DoGetSizeMM(int *width, int *height) const
1279 {
1280 int w = 0;
1281 int h = 0;
1282 GetSize(&w, &h);
1283 if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
1284 if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
1285 }
1286
1287 wxSize wxDC::GetPPI() const
1288 {
1289 return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
1290 int(double(m_mm_to_pix_y) * inches2mm));
1291 }
1292
1293
1294 // ---------------------------------------------------------------------------
1295 // Blitting
1296 // ---------------------------------------------------------------------------
1297
1298 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1299 wxCoord width, wxCoord height,
1300 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1301 wxRasterOperationMode rop, bool useMask,
1302 wxCoord xsrcMask, wxCoord ysrcMask)
1303 {
1304 wxCHECK_MSG( IsOk(), false, wxT("invalid dc") );
1305 wxCHECK_MSG( source, false, wxT("invalid source dc") );
1306
1307 // transform the source DC coords to the device ones
1308 xsrc = source->LogicalToDeviceX(xsrc);
1309 ysrc = source->LogicalToDeviceY(ysrc);
1310
1311 /* FIXME_MGL: use the mask origin when drawing transparently */
1312 if (xsrcMask == -1 && ysrcMask == -1)
1313 {
1314 xsrcMask = xsrc; ysrcMask = ysrc;
1315 }
1316 else
1317 {
1318 xsrcMask = source->LogicalToDeviceX(xsrcMask);
1319 ysrcMask = source->LogicalToDeviceY(ysrcMask);
1320 }
1321
1322 CalcBoundingBox(xdest, ydest);
1323 CalcBoundingBox(xdest + width, ydest + height);
1324
1325 /* scale/translate size and position */
1326 wxCoord xx = XLOG2DEV(xdest);
1327 wxCoord yy = YLOG2DEV(ydest);
1328
1329 if ( source->m_isMemDC )
1330 {
1331 wxMemoryDC *memDC = (wxMemoryDC*) source;
1332 DoDrawSubBitmap(memDC->GetSelectedObject(),
1333 xsrc, ysrc, width, height,
1334 xdest, ydest, rop, useMask);
1335 }
1336 else
1337 {
1338 wxCoord ww = XLOG2DEVREL(width);
1339 wxCoord hh = YLOG2DEVREL(height);
1340
1341 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1342 m_MGLDC->bitBlt(*source->GetMGLDC(),
1343 xsrc, ysrc, xsrc + ww, ysrc + hh,
1344 xx, yy, LogicalFunctionToMGLRop(rop));
1345 }
1346
1347 return true;
1348 }
1349
1350 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
1351 {
1352 wxCHECK_RET( IsOk(), wxT("invalid dc") );
1353 wxCHECK_RET( bmp.IsOk(), wxT("invalid bitmap") );
1354
1355 wxCoord w = bmp.GetWidth();
1356 wxCoord h = bmp.GetHeight();
1357
1358 DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
1359 }
1360
1361 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
1362 {
1363 // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
1364 DoDrawBitmap((const wxBitmap&)icon, x, y, true);
1365 }
1366
1367
1368 static inline void DoBitBlt(const wxBitmap& src, MGLDevCtx *dst,
1369 int sx, int sy, int sw, int sh,
1370 int dx, int dy, int dw, int dh,
1371 int rop, bool useStretching, bool putSection)
1372 {
1373 bitmap_t *bmp = src.GetMGLbitmap_t();
1374 if (!useStretching)
1375 {
1376 if (!putSection)
1377 dst->putBitmap(dx, dy, bmp, rop);
1378 else
1379 dst->putBitmapSection(sx, sy, sx + sw, sy + sh, dx, dy, bmp, rop);
1380 }
1381 else
1382 {
1383 if (!putSection)
1384 dst->stretchBitmap(dx, dy, dx + dw, dy + dh, bmp, rop);
1385 else
1386 dst->stretchBitmapSection(sx, sy, sx + sw, sy + sh,
1387 dx, dy, dx + dw, dy + dh, bmp, rop);
1388 }
1389 }
1390
1391 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
1392 wxCoord x, wxCoord y, wxCoord w, wxCoord h,
1393 wxCoord destx, wxCoord desty, int rop, bool useMask)
1394 {
1395 wxCHECK_RET( IsOk(), wxT("invalid dc") );
1396 wxCHECK_RET( bmp.IsOk(), wxT("invalid bitmap") );
1397
1398 CalcBoundingBox(x, y);
1399 CalcBoundingBox(x + w, y + h);
1400
1401 wxCoord dx = XLOG2DEV(destx);
1402 wxCoord dy = YLOG2DEV(desty);
1403 wxCoord dw = XLOG2DEVREL(w);
1404 wxCoord dh = YLOG2DEVREL(h);
1405
1406 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1407
1408 bool useStretching = ((w != dw) || (h != dh));
1409 bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
1410 MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
1411
1412 if ( bmp.GetDepth() == 1 )
1413 {
1414 // Mono bitmaps are handled in special way -- all 1s are drawn in
1415 // foreground colours, all 0s in background colour.
1416
1417 ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
1418 }
1419
1420 if ( useMask && bmp.GetMask() )
1421 {
1422 // Since MGL does not support masks directly (in MGL, mask is handled
1423 // in same way as in wxImage, i.e. there is one "key" color), we
1424 // simulate masked bitblt in 6 steps (same as in MSW):
1425 //
1426 // 1. Create a temporary bitmap and copy the destination area into it.
1427 // 2. Copy the source area into the temporary bitmap using the
1428 // specified logical function.
1429 // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
1430 // the mask bitmap with the temp bitmap with the foreground colour
1431 // set to WHITE and the bg colour set to BLACK.
1432 // 4. Set the unmasked area in the destination area to BLACK by
1433 // ANDing the mask bitmap with the destination area with the
1434 // foreground colour set to BLACK and the background colour set
1435 // to WHITE.
1436 // 5. OR the temporary bitmap with the destination area.
1437 // 6. Delete the temporary bitmap.
1438 //
1439 // This sequence of operations ensures that the source's transparent
1440 // area need not be black, and logical functions are supported.
1441
1442 wxBitmap mask = bmp.GetMask()->GetBitmap();
1443
1444 MGLMemoryDC *temp;
1445
1446 if ( GetDepth() <= 8 )
1447 {
1448 temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
1449 wxDC tempdc;
1450 tempdc.SetMGLDC(temp, false);
1451 tempdc.SetPalette(m_palette);
1452 }
1453 else
1454 {
1455 pixel_format_t pf;
1456 m_MGLDC->getPixelFormat(pf);
1457 temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
1458 }
1459
1460 wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
1461
1462 temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
1463
1464 DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
1465 useStretching, putSection);
1466
1467 mask.SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
1468 DoBitBlt(mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
1469 useStretching, putSection);
1470 DoBitBlt(mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
1471 useStretching, putSection);
1472
1473 m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
1474
1475 delete temp;
1476 }
1477
1478 else
1479 {
1480 DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
1481 useStretching, putSection);
1482 }
1483 }
wxWidgets (Impactor)