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[wxWidgets.git] / src / mgl / dc.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: 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 #ifdef __GNUG__
20 #pragma implementation "dc.h"
21 #endif
22
23 // For compilers that support precompilation, includes "wx.h".
24 #include "wx/wxprec.h"
25
26 #ifdef __BORLANDC__
27 #pragma hdrstop
28 #endif
29
30 #ifndef WX_PRECOMP
31 #include "wx/dc.h"
32 #include "wx/dcmemory.h"
33 #endif
34
35 #include "wx/fontutil.h"
36 #include "wx/fontmap.h"
37 #include "wx/mgl/private.h"
38 #include "wx/log.h"
39
40 #include <string.h>
41 #include <math.h>
42 #include <mgraph.hpp>
43
44
45
46 //-----------------------------------------------------------------------------
47 // constants
48 //-----------------------------------------------------------------------------
49
50 #ifndef M_PI
51 #define M_PI 3.14159265358979323846
52 #endif
53
54 const double mm2inches = 0.0393700787402;
55 const double inches2mm = 25.4;
56 const double mm2twips = 56.6929133859;
57 const double twips2mm = 0.0176388888889;
58 const double mm2pt = 2.83464566929;
59 const double pt2mm = 0.352777777778;
60 const double RAD2DEG = 180.0 / M_PI;
61
62
63 //-----------------------------------------------------------------------------
64 // pens data:
65 //-----------------------------------------------------------------------------
66
67 const ushort STIPPLE_wxDOT = 0x5555/* - - - - - - - -*/;
68 const ushort STIPPLE_wxLONG_DASH = 0xF0F0/* ---- ----*/;
69 const ushort STIPPLE_wxSHORT_DASH = 0xCCCC/*-- -- -- -- */;
70 const ushort STIPPLE_wxDOT_DASH = 0x3939/* --- - --- -*/;
71 const ushort STIPPLE_wxSOLID = 0xFFFF/*----------------*/;
72
73 #define PATTERN_ROW(b7,b6,b5,b4,b3,b2,b1,b0) \
74 ((b7 << 7) | (b6 << 6) | (b5 << 5) | (b4 << 4) | \
75 (b3 << 3) | (b2 << 2) | (b1 << 1) | b0)
76
77 static pattern_t PATTERN_wxFDIAGONAL_HATCH = {{
78 PATTERN_ROW(1,0,0,0,0,0,0,0),
79 PATTERN_ROW(0,1,0,0,0,0,0,0),
80 PATTERN_ROW(0,0,1,0,0,0,0,0),
81 PATTERN_ROW(0,0,0,1,0,0,0,0),
82 PATTERN_ROW(0,0,0,0,1,0,0,0),
83 PATTERN_ROW(0,0,0,0,0,1,0,0),
84 PATTERN_ROW(0,0,0,0,0,0,1,0),
85 PATTERN_ROW(0,0,0,0,0,0,0,1),
86 }};
87
88 static pattern_t PATTERN_wxCROSSDIAG_HATCH = {{
89 PATTERN_ROW(1,0,0,0,0,0,0,1),
90 PATTERN_ROW(0,1,0,0,0,0,1,0),
91 PATTERN_ROW(0,0,1,0,0,1,0,0),
92 PATTERN_ROW(0,0,0,1,1,0,0,0),
93 PATTERN_ROW(0,0,0,1,1,0,0,0),
94 PATTERN_ROW(0,0,1,0,0,1,0,0),
95 PATTERN_ROW(0,1,0,0,0,0,1,0),
96 PATTERN_ROW(1,0,0,0,0,0,0,1),
97 }};
98
99 static pattern_t PATTERN_wxBDIAGONAL_HATCH = {{
100 PATTERN_ROW(0,0,0,0,0,0,0,1),
101 PATTERN_ROW(0,0,0,0,0,0,1,0),
102 PATTERN_ROW(0,0,0,0,0,1,0,0),
103 PATTERN_ROW(0,0,0,0,1,0,0,0),
104 PATTERN_ROW(0,0,0,1,0,0,0,0),
105 PATTERN_ROW(0,0,1,0,0,0,0,0),
106 PATTERN_ROW(0,1,0,0,0,0,0,0),
107 PATTERN_ROW(1,0,0,0,0,0,0,0),
108 }};
109
110 static pattern_t PATTERN_wxCROSS_HATCH = {{
111 PATTERN_ROW(0,0,0,1,0,0,0,0),
112 PATTERN_ROW(0,0,0,1,0,0,0,0),
113 PATTERN_ROW(0,0,0,1,0,0,0,0),
114 PATTERN_ROW(1,1,1,1,1,1,1,1),
115 PATTERN_ROW(0,0,0,1,0,0,0,0),
116 PATTERN_ROW(0,0,0,1,0,0,0,0),
117 PATTERN_ROW(0,0,0,1,0,0,0,0),
118 PATTERN_ROW(0,0,0,1,0,0,0,0),
119 }};
120
121 static pattern_t PATTERN_wxHORIZONTAL_HATCH = {{
122 PATTERN_ROW(0,0,0,0,0,0,0,0),
123 PATTERN_ROW(0,0,0,0,0,0,0,0),
124 PATTERN_ROW(0,0,0,0,0,0,0,0),
125 PATTERN_ROW(1,1,1,1,1,1,1,1),
126 PATTERN_ROW(0,0,0,0,0,0,0,0),
127 PATTERN_ROW(0,0,0,0,0,0,0,0),
128 PATTERN_ROW(0,0,0,0,0,0,0,0),
129 PATTERN_ROW(0,0,0,0,0,0,0,0),
130 }};
131
132 static pattern_t PATTERN_wxVERTICAL_HATCH = {{
133 PATTERN_ROW(0,0,0,1,0,0,0,0),
134 PATTERN_ROW(0,0,0,1,0,0,0,0),
135 PATTERN_ROW(0,0,0,1,0,0,0,0),
136 PATTERN_ROW(0,0,0,1,0,0,0,0),
137 PATTERN_ROW(0,0,0,1,0,0,0,0),
138 PATTERN_ROW(0,0,0,1,0,0,0,0),
139 PATTERN_ROW(0,0,0,1,0,0,0,0),
140 PATTERN_ROW(0,0,0,1,0,0,0,0),
141 }};
142
143 #undef PATTERN_ROW
144
145 //-----------------------------------------------------------------------------
146 // wxDC
147 //-----------------------------------------------------------------------------
148
149 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
150
151 // Default constructor
152 wxDC::wxDC()
153 {
154 m_isMemDC = FALSE;
155 m_MGLDC = NULL;
156 m_OwnsMGLDC = FALSE;
157 m_ok = FALSE; // must call SetMGLDevCtx() before using it
158
159 m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
160 (double)wxGetDisplaySizeMM().GetWidth();
161 m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
162 (double)wxGetDisplaySizeMM().GetHeight();
163
164 m_pen = *wxBLACK_PEN;
165 m_font = *wxNORMAL_FONT;
166 m_brush = *wxWHITE_BRUSH;
167 m_penOfsX = m_penOfsY = 0;
168
169 m_penSelected = m_brushSelected = FALSE;
170 m_downloadedPatterns[0] = m_downloadedPatterns[1] = FALSE;
171
172 m_mglFont = NULL;
173 }
174
175
176 wxDC::~wxDC()
177 {
178 if (m_OwnsMGLDC)
179 delete m_MGLDC;
180 }
181
182 void wxDC::SetMGLDC(MGLDevCtx *mgldc, bool OwnsMGLDC)
183 {
184 if ( m_OwnsMGLDC && m_MGLDC )
185 delete m_MGLDC;
186 m_MGLDC = mgldc;
187 m_OwnsMGLDC = OwnsMGLDC;
188 m_ok = TRUE;
189
190 if ( !m_globalClippingRegion.IsNull() )
191 SetClippingRegion(m_globalClippingRegion);
192
193 InitializeMGLDC();
194 }
195
196 void wxDC::InitializeMGLDC()
197 {
198 if ( GetDepth() > 8 )
199 {
200 wxCurrentDCSwitcher switcher(m_MGLDC); // will go away with MGL6
201 m_MGLDC->setFontBlendMode(MGL_AA_RGBBLEND);
202 }
203 }
204
205
206 // ---------------------------------------------------------------------------
207 // clipping
208 // ---------------------------------------------------------------------------
209
210
211 #define DO_SET_CLIPPING_BOX(rg) \
212 { \
213 wxRect rect = rg.GetBox(); \
214 m_clipX1 = (wxCoord) XDEV2LOG(rect.GetLeft()); \
215 m_clipY1 = (wxCoord) YDEV2LOG(rect.GetTop()); \
216 m_clipX2 = (wxCoord) XDEV2LOG(rect.GetRight()); \
217 m_clipY2 = (wxCoord) YDEV2LOG(rect.GetBottom()); \
218 }
219
220 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
221 {
222 wxCHECK_RET( Ok(), wxT("invalid dc") );
223
224 wxRect rect(XLOG2DEV(cx), YLOG2DEV(cy), XLOG2DEVREL(cw), YLOG2DEVREL(ch));
225
226 if ( !m_currentClippingRegion.IsNull() )
227 m_currentClippingRegion.Intersect(rect);
228 else
229 m_currentClippingRegion.Union(rect);
230
231 m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
232
233 m_clipping = TRUE;
234 DO_SET_CLIPPING_BOX(m_currentClippingRegion)
235 }
236
237 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
238 {
239 wxCHECK_RET( Ok(), wxT("invalid dc") );
240
241 if ( region.IsEmpty() )
242 {
243 DestroyClippingRegion();
244 return;
245 }
246
247 wxRegion rg(region);
248
249 // check if the DC is scaled or moved, and if yes, then
250 // convert rg to device coordinates:
251 if ( m_deviceOriginX != 0 || m_deviceOriginY != 0 ||
252 XLOG2DEVREL(500) != 500 || YLOG2DEVREL(500) != 500 )
253 {
254 region_t *mrg = rg.GetMGLRegion().rgnPointer();
255 span_t *s;
256 segment_t *p;
257 for (s = mrg->spans; s; s = s->next)
258 {
259 s->y = YLOG2DEV(s->y);
260 for (p = s->seg; p; p = p->next)
261 p->x = XLOG2DEV(p->x);
262 }
263 }
264
265 if ( !m_currentClippingRegion.IsNull() )
266 m_currentClippingRegion.Intersect(rg);
267 else
268 m_currentClippingRegion.Union(rg);
269
270 m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
271
272 m_clipping = TRUE;
273 DO_SET_CLIPPING_BOX(m_currentClippingRegion)
274 }
275
276 void wxDC::DestroyClippingRegion()
277 {
278 wxCHECK_RET( Ok(), wxT("invalid dc") );
279
280 if ( !m_globalClippingRegion.IsNull() )
281 {
282 m_MGLDC->setClipRegion(m_globalClippingRegion.GetMGLRegion());
283 m_currentClippingRegion = m_globalClippingRegion;
284 m_clipping = TRUE;
285 }
286 else
287 {
288 m_MGLDC->setClipRect(MGLRect(0, 0, m_MGLDC->sizex()+1, m_MGLDC->sizey()+1));
289 m_clipping = FALSE;
290 m_currentClippingRegion.Clear();
291 }
292 }
293
294 // ---------------------------------------------------------------------------
295 // query capabilities
296 // ---------------------------------------------------------------------------
297
298 bool wxDC::CanDrawBitmap() const
299 {
300 return TRUE;
301 }
302
303 bool wxDC::CanGetTextExtent() const
304 {
305 return TRUE;
306 }
307
308 int wxDC::GetDepth() const
309 {
310 return m_MGLDC->getBitsPerPixel();
311 }
312
313 // ---------------------------------------------------------------------------
314 // drawing
315 // ---------------------------------------------------------------------------
316
317 void wxDC::Clear()
318 {
319 wxCHECK_RET( Ok(), wxT("invalid dc") );
320
321 m_MGLDC->makeCurrent(); // will go away with MGL6.0
322 if ( m_backgroundBrush.GetStyle() != wxTRANSPARENT )
323 {
324 int w, h;
325 wxBrush oldb = m_brush;
326 SetBrush(m_backgroundBrush);
327 SelectBrush();
328 GetSize(&w, &h);
329 m_MGLDC->fillRect(0, 0, w, h);
330 SetBrush(oldb);
331 }
332 }
333
334 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
335 {
336 wxFAIL_MSG( wxT("wxDC::DoFloodFill not implemented") );
337 }
338
339 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
340 {
341 wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel"));
342
343 uchar r, g, b;
344 m_MGLDC->unpackColorFast(m_MGLDC->getPixel(XLOG2DEV(x), YLOG2DEV(y)),
345 r, g, b);
346 col->Set(r, g, b);
347 return TRUE;
348 }
349
350 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
351 {
352 wxCHECK_RET( Ok(), wxT("invalid dc") );
353
354 if ( m_pen.GetStyle() != wxTRANSPARENT )
355 {
356 int w = 0;
357 int h = 0;
358 GetSize(&w, &h);
359 m_MGLDC->makeCurrent(); // will go away with MGL6.0
360 if ( !m_penSelected )
361 SelectPen();
362 wxCoord xx = XLOG2DEV(x);
363 wxCoord yy = YLOG2DEV(y);
364 m_MGLDC->line(m_penOfsX, yy + m_penOfsY, w-1 + m_penOfsX, yy + m_penOfsY);
365 m_MGLDC->line(xx + m_penOfsX, m_penOfsY, x + m_penOfsX, h-1 + m_penOfsY);
366 CalcBoundingBox(0, 0);
367 CalcBoundingBox(w, h);
368 }
369 }
370
371 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
372 {
373 wxCHECK_RET( Ok(), wxT("invalid dc") );
374
375 if ( m_pen.GetStyle() != wxTRANSPARENT )
376 {
377 m_MGLDC->makeCurrent(); // will go away with MGL6.0
378 if ( !m_penSelected )
379 SelectPen();
380 m_MGLDC->lineExt(XLOG2DEV(x1) + m_penOfsX, YLOG2DEV(y1) + m_penOfsY,
381 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY,FALSE);
382 CalcBoundingBox(x1, y1);
383 CalcBoundingBox(x2, y2);
384 }
385 }
386
387 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
388 // and ending at (x2, y2)
389 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
390 wxCoord x2, wxCoord y2,
391 wxCoord xc, wxCoord yc)
392 {
393 wxCHECK_RET( Ok(), wxT("invalid dc") );
394
395 wxCoord xx1 = XLOG2DEV(x1);
396 wxCoord yy1 = YLOG2DEV(y1);
397 wxCoord xx2 = XLOG2DEV(x2);
398 wxCoord yy2 = YLOG2DEV(y2);
399 wxCoord xxc = XLOG2DEV(xc);
400 wxCoord yyc = YLOG2DEV(yc);
401 double dx = xx1 - xxc;
402 double dy = yy1 - yyc;
403 double radius = sqrt((double)(dx*dx+dy*dy));
404 wxCoord r = (wxCoord)radius;
405 double radius1, radius2;
406
407
408 if (xx1 == xx2 && yy1 == yy2)
409 {
410 radius1 = 0.0;
411 radius2 = 360.0;
412 }
413 else if (radius == 0.0)
414 {
415 radius1 = radius2 = 0.0;
416 }
417 else
418 {
419 radius1 = (xx1 - xxc == 0) ?
420 (yy1 - yyc < 0) ? 90.0 : -90.0 :
421 -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
422 radius2 = (xx2 - xxc == 0) ?
423 (yy2 - yyc < 0) ? 90.0 : -90.0 :
424 -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
425 }
426 wxCoord alpha1 = wxCoord(radius1);
427 wxCoord alpha2 = alpha1 + wxCoord(radius2 - radius1);
428 while (alpha2 <= 0) alpha2 += 360;
429 while (alpha1 > 360) alpha1 -= 360;
430
431 m_MGLDC->makeCurrent(); // will go away with MGL6.0
432 if ( m_brush.GetStyle() != wxTRANSPARENT )
433 {
434 if ( !m_brushSelected )
435 SelectBrush();
436 m_MGLDC->fillEllipseArc(xxc, yyc, r, r, alpha1, alpha2);
437 }
438
439 if ( m_pen.GetStyle() != wxTRANSPARENT )
440 {
441 if ( !m_penSelected )
442 SelectPen();
443 m_MGLDC->ellipseArc(xxc + m_penOfsX, yyc + m_penOfsY, r, r, alpha1, alpha2);
444 }
445
446 CalcBoundingBox(xc - r, yc - r);
447 CalcBoundingBox(xc + r, yc + r);
448 }
449
450 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
451 {
452 wxCHECK_RET( Ok(), wxT("invalid dc") );
453
454 if ( m_pen.GetStyle() != wxTRANSPARENT )
455 {
456 m_MGLDC->makeCurrent(); // will go away with MGL6.0
457 if ( !m_penSelected )
458 SelectPen();
459 m_MGLDC->pixel(XLOG2DEV(x), YLOG2DEV(y));
460 CalcBoundingBox(x, y);
461 }
462 }
463
464 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
465 {
466 wxCHECK_RET( Ok(), wxT("invalid dc") );
467
468 wxCoord xxoffset = XLOG2DEVREL(xoffset),
469 yyoffset = YLOG2DEVREL(yoffset);
470 MGLPoint *cpoints = new MGLPoint[n+1];
471 for (int i = 0; i < n; i++)
472 {
473 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
474 cpoints[i].x = (int)(XLOG2DEV(points[i].x));
475 cpoints[i].y = (int)(YLOG2DEV(points[i].y));
476 }
477 cpoints[n] = cpoints[0];
478
479 m_MGLDC->makeCurrent(); // will go away with MGL6.0
480 if ( m_brush.GetStyle() != wxTRANSPARENT )
481 {
482 if ( !m_brushSelected )
483 SelectBrush();
484 m_MGLDC->fillPolygon(n, cpoints, xxoffset, yyoffset);
485 }
486
487 if ( m_pen.GetStyle() != wxTRANSPARENT )
488 {
489 if ( !m_penSelected )
490 SelectPen();
491 if (m_penOfsX != 0 || m_penOfsY != 0)
492 {
493 for (int i = 0; i <= n; i++)
494 {
495 cpoints[i].x += m_penOfsX;
496 cpoints[i].y += m_penOfsY;
497 }
498 }
499 m_MGLDC->polyLine(n+1, cpoints);
500 }
501
502 delete[] cpoints;
503 }
504
505 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
506 {
507 wxCHECK_RET( Ok(), wxT("invalid dc") );
508
509 if ( m_pen.GetStyle() != wxTRANSPARENT )
510 {
511 MGLPoint *cpoints = new MGLPoint[n];
512 m_MGLDC->makeCurrent(); // will go away with MGL6.0
513 if ( !m_penSelected )
514 SelectPen();
515 for (int i = 0; i < n; i++)
516 {
517 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
518 cpoints[i].x = (int)(XLOG2DEV(points[i].x + xoffset) /*+ m_penOfsX*/);
519 cpoints[i].y = (int)(YLOG2DEV(points[i].y + yoffset) /*+ m_penOfsY*/);
520 }
521 m_MGLDC->polyLine(n, cpoints);
522 delete[] cpoints;
523 }
524 }
525
526 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
527 {
528 wxCHECK_RET( Ok(), wxT("invalid dc") );
529
530 wxCoord xx = XLOG2DEV(x);
531 wxCoord yy = YLOG2DEV(y);
532 wxCoord ww = m_signX * XLOG2DEVREL(width);
533 wxCoord hh = m_signY * YLOG2DEVREL(height);
534
535 if ( ww == 0 || hh == 0 ) return;
536
537 if ( ww < 0 )
538 {
539 ww = -ww;
540 xx = xx - ww;
541 }
542 if ( hh < 0 )
543 {
544 hh = -hh;
545 yy = yy - hh;
546 }
547
548 m_MGLDC->makeCurrent(); // will go away with MGL6.0
549 if ( m_brush.GetStyle() != wxTRANSPARENT )
550 {
551 if ( !m_brushSelected )
552 SelectBrush();
553 m_MGLDC->fillRect(xx, yy, xx + ww, yy + hh);
554 }
555
556 if ( m_pen.GetStyle() != wxTRANSPARENT )
557 {
558 if ( !m_penSelected )
559 SelectPen();
560
561 m_MGLDC->rect(xx + m_penOfsX, yy + m_penOfsY,
562 xx + ww + m_penOfsX, yy + hh + m_penOfsY);
563 }
564
565 CalcBoundingBox(x, y);
566 CalcBoundingBox(x + width, y + height);
567 }
568
569 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
570 {
571 wxCHECK_RET( Ok(), wxT("invalid dc") );
572
573 if ( radius < 0.0 )
574 radius = -radius * ((width < height) ? width : height);
575
576 wxCoord xx = XLOG2DEV(x);
577 wxCoord yy = YLOG2DEV(y);
578 wxCoord ww = m_signX * XLOG2DEVREL(width);
579 wxCoord hh = m_signY * YLOG2DEVREL(height);
580 wxCoord rr = XLOG2DEVREL((wxCoord)radius);
581
582 // CMB: handle -ve width and/or height
583 if ( ww < 0 )
584 {
585 ww = -ww;
586 xx = xx - ww;
587 }
588 if ( hh < 0 )
589 {
590 hh = -hh;
591 yy = yy - hh;
592 }
593
594 // CMB: if radius is zero use DrawRectangle() instead to avoid
595 // X drawing errors with small radii
596 if ( rr == 0 )
597 {
598 DrawRectangle(x, y, width, height);
599 return;
600 }
601
602 // CMB: draw nothing if transformed w or h is 0
603 if ( ww == 0 || hh == 0 ) return;
604
605 // CMB: ensure dd is not larger than rectangle otherwise we
606 // get an hour glass shape
607 wxCoord dd = 2 * rr;
608 if ( dd > ww ) dd = ww;
609 if ( dd > hh ) dd = hh;
610 rr = dd / 2;
611
612 m_MGLDC->makeCurrent(); // will go away with MGL6.0
613 if ( m_brush.GetStyle() != wxTRANSPARENT )
614 {
615 if (!m_brushSelected)
616 SelectBrush();
617 m_MGLDC->fillRect(xx+rr, yy, xx+ww-rr, yy+hh);
618 m_MGLDC->fillRect(xx, yy+rr, xx+ww, yy+hh-rr);
619 m_MGLDC->fillEllipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
620 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
621 m_MGLDC->fillEllipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
622 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
623 }
624
625 if ( m_pen.GetStyle() != wxTRANSPARENT )
626 {
627 if ( !m_penSelected )
628 SelectPen();
629 xx += m_penOfsX;
630 yy += m_penOfsY;
631 m_MGLDC->line(xx+rr+1, yy, xx+ww-rr, yy);
632 m_MGLDC->ellipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
633 m_MGLDC->line(xx+ww, yy+rr+1, xx+ww, yy+hh-rr);
634 m_MGLDC->ellipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
635 m_MGLDC->line(xx+ww-rr, yy+hh, xx+rr+1, yy+hh);
636 m_MGLDC->ellipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
637 m_MGLDC->line(xx, yy+hh-rr, xx, yy+rr+1);
638 m_MGLDC->ellipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
639 }
640
641 CalcBoundingBox(x, y);
642 CalcBoundingBox(x + width, y + height);
643 }
644
645 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
646 {
647 wxCHECK_RET( Ok(), wxT("invalid dc") );
648
649 wxCoord x2 = (x+width);
650 wxCoord y2 = (y+height);
651
652 m_MGLDC->makeCurrent(); // will go away with MGL6.0
653 if ( m_brush.GetStyle() != wxTRANSPARENT )
654 {
655 if ( !m_brushSelected )
656 SelectBrush();
657 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
658 m_MGLDC->fillEllipse(rect);
659 }
660
661 if ( m_pen.GetStyle() != wxTRANSPARENT )
662 {
663 if ( !m_penSelected )
664 SelectPen();
665 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
666 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
667 m_MGLDC->ellipse(rect);
668 }
669
670 CalcBoundingBox(x, y);
671 CalcBoundingBox(x2, y2);
672 }
673
674 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
675 {
676 wxCHECK_RET( Ok(), wxT("invalid dc") );
677
678 wxCoord x2 = (x+w);
679 wxCoord y2 = (y+h);
680
681 m_MGLDC->makeCurrent(); // will go away with MGL6.0
682 if ( m_brush.GetStyle() != wxTRANSPARENT )
683 {
684 if (!m_brushSelected) SelectBrush();
685 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
686 m_MGLDC->fillEllipseArc(rect, (int)sa, (int)ea);
687 }
688
689 if ( m_pen.GetStyle() != wxTRANSPARENT )
690 {
691 if ( !m_penSelected )
692 SelectPen();
693 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
694 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
695 m_MGLDC->ellipseArc(rect, (int)sa, (int)ea);
696 }
697
698 CalcBoundingBox(x, y);
699 CalcBoundingBox(x2, y2);
700 }
701
702 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
703 {
704 m_MGLDC->makeCurrent(); // will go away with MGL6.0
705 DrawAnyText(text, x, y);
706
707 // update the bounding box
708 wxCoord w, h;
709 CalcBoundingBox(x, y);
710 GetTextExtent(text, &w, &h);
711 CalcBoundingBox(x + w, y + h);
712 }
713
714 bool wxDC::SelectMGLFont()
715 {
716 if ( m_mglFont == NULL )
717 {
718 float scale = m_scaleY;
719 bool antialiased = (GetDepth() > 8);
720
721 m_mglFont = m_font.GetMGLfont_t(scale, antialiased);
722 wxCHECK_MSG( m_mglFont, FALSE, wxT("invalid font") );
723
724 m_MGLDC->useFont(m_mglFont);
725 wxLogTrace("mgl_font", "useFont(%p)", m_mglFont);
726
727 #if !wxUSE_UNICODE
728 wxNativeEncodingInfo nativeEnc;
729 wxFontEncoding encoding = m_font.GetEncoding();
730 if ( !wxGetNativeFontEncoding(encoding, &nativeEnc) ||
731 !wxTestFontEncoding(nativeEnc) )
732 {
733 #if wxUSE_FONTMAP
734 if ( !wxTheFontMapper->GetAltForEncoding(encoding, &nativeEnc) )
735 #endif
736 {
737 nativeEnc.mglEncoding = MGL_ENCODING_ASCII;
738 }
739 }
740 m_MGLDC->setTextEncoding(nativeEnc.mglEncoding);
741 #endif
742 }
743 return TRUE;
744 }
745
746 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
747 {
748 wxCHECK_RET( Ok(), wxT("invalid dc") );
749
750 SelectMGLFont();
751
752 // Render the text:
753 wxCoord xx = XLOG2DEV(x);
754 wxCoord yy = YLOG2DEV(y);
755
756 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
757 m_MGLDC->setLineStipple(0xFFFF);
758 m_MGLDC->setPenSize(1, 1);
759 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
760
761 #if wxUSE_UNICODE
762 const wchar_t *c_text = text.c_str();
763 #else
764 const char *c_text = text.c_str();
765 #endif
766
767 #if 1
768 // FIXME_MGL - this is a temporary hack in absence of proper
769 // implementation of solid text background in MGL. Once
770 // the bug in MGL is fixed, this code should be nuked
771 // immediately. Note that the code is not 100% correct;
772 // it only works with wxCOPY logical function
773 if ( m_backgroundMode == wxSOLID )
774 {
775 int w = m_MGLDC->textWidth(c_text);
776 int h = m_MGLDC->textHeight();
777 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
778 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
779 m_MGLDC->fillRect(xx, yy, xx+w, yy+h);
780 }
781 #endif
782
783 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textForegroundColour.Red(),
784 m_textForegroundColour.Green(), m_textForegroundColour.Blue()));
785 m_MGLDC->setBackColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
786 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
787
788 m_MGLDC->drawStr(xx, yy, c_text);
789
790 // Render underline:
791 if ( m_font.GetUnderlined() )
792 {
793 int x1 = xx, y1 = yy;
794 int x2 = 0 , y2 = 0;
795 int w = m_MGLDC->textWidth(c_text);
796 m_MGLDC->underScoreLocation(x1, y1, c_text);
797 switch (m_MGLDC->getTextDirection())
798 {
799 case MGL_RIGHT_DIR: x2 = x1 + w, y2 = y1; break;
800 case MGL_LEFT_DIR: x2 = x1 - w, y2 = y1; break;
801 case MGL_UP_DIR: x2 = x1, y2 = y1 - w; break;
802 case MGL_DOWN_DIR: x2 = x1, y2 = y1 + w; break;
803 }
804 m_MGLDC->line(x1, y1, x2, y2);
805 }
806
807 m_penSelected = m_brushSelected = FALSE;
808 }
809
810 void wxDC::DoDrawRotatedText(const wxString& text,
811 wxCoord x, wxCoord y,
812 double angle)
813 {
814 m_MGLDC->makeCurrent(); // will go away with MGL6.0
815
816 if ( angle == 0 )
817 {
818 DoDrawText(text, x, y);
819 return;
820 }
821 else if ( angle == 90.0 )
822 m_MGLDC->setTextDirection(MGL_UP_DIR);
823 else if ( angle == 180.0 )
824 m_MGLDC->setTextDirection(MGL_LEFT_DIR);
825 else if ( angle == 270.0 )
826 m_MGLDC->setTextDirection(MGL_DOWN_DIR);
827 else
828 {
829 // FIXME_MGL -- implement once MGL supports it
830 wxFAIL_MSG(wxT("wxMGL only supports rotated text with angle 0,90,180 or 270"));
831 return;
832 }
833
834 DrawAnyText(text, x, y);
835
836 // Restore default:
837 m_MGLDC->setTextDirection(MGL_RIGHT_DIR);
838 }
839
840 // ---------------------------------------------------------------------------
841 // set GDI objects
842 // ---------------------------------------------------------------------------
843
844 void wxDC::SelectMGLStipplePen(int style)
845 {
846 ushort stipple;
847
848 switch (style)
849 {
850 case wxDOT: stipple = STIPPLE_wxDOT; break;
851 case wxLONG_DASH: stipple = STIPPLE_wxLONG_DASH; break;
852 case wxSHORT_DASH: stipple = STIPPLE_wxSHORT_DASH; break;
853 case wxDOT_DASH: stipple = STIPPLE_wxDOT_DASH; break;
854 default: stipple = STIPPLE_wxSOLID; break;
855 }
856
857 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
858 m_MGLDC->setLineStipple(stipple);
859 m_MGLDC->setPenSize(1, 1);
860 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
861 m_penOfsY = m_penOfsX = 0;
862 }
863
864 // Accepted valus of SelectMGLFatPen's 2nd argument
865 enum {
866 wxMGL_SELECT_FROM_PEN,
867 wxMGL_SELECT_FROM_BRUSH
868 };
869
870 void wxDC::SelectMGLFatPen(int style, int flag)
871 {
872 MGL_penStyleType penstyle;
873 const pattern_t *pattern = NULL;
874 pixpattern24_t *pixPattern = NULL;
875 int wx, wy;
876 int slot;
877
878 // Since MGL pens may be created from wxBrush or wxPen and we often
879 // switch between pens and brushes, we take advantage of MGL's ability
880 // to have multiple (pix)pattern_t's loaded. We always download pen
881 // to 0th slot and brush to 1st slot.
882 if ( flag == wxMGL_SELECT_FROM_PEN )
883 slot = 0;
884 else
885 slot = 1;
886
887 // compute pen's width:
888 if ( m_pen.GetWidth() <= 1 )
889 {
890 wx = wy = 1;
891 m_penOfsX = m_penOfsY = 0;
892 }
893 else
894 {
895 wx = (int)(0.5 + fabs((double) XLOG2DEVREL(m_pen.GetWidth())));
896 wy = (int)(0.5 + fabs((double) YLOG2DEVREL(m_pen.GetWidth())));
897 m_penOfsX = -wx/2;
898 m_penOfsY = -wy/2;
899 }
900
901 // find pen's type:
902 penstyle = MGL_BITMAP_TRANSPARENT;
903 switch (style)
904 {
905 case wxBDIAGONAL_HATCH: pattern = &PATTERN_wxBDIAGONAL_HATCH;
906 penstyle = MGL_BITMAP_TRANSPARENT;
907 break;
908 case wxCROSSDIAG_HATCH: pattern = &PATTERN_wxCROSSDIAG_HATCH;
909 penstyle = MGL_BITMAP_TRANSPARENT;
910 break;
911 case wxFDIAGONAL_HATCH: pattern = &PATTERN_wxFDIAGONAL_HATCH;
912 penstyle = MGL_BITMAP_TRANSPARENT;
913 break;
914 case wxCROSS_HATCH: pattern = &PATTERN_wxCROSS_HATCH;
915 penstyle = MGL_BITMAP_TRANSPARENT;
916 break;
917 case wxHORIZONTAL_HATCH: pattern = &PATTERN_wxHORIZONTAL_HATCH;
918 penstyle = MGL_BITMAP_TRANSPARENT;
919 break;
920 case wxVERTICAL_HATCH: pattern = &PATTERN_wxVERTICAL_HATCH;
921 penstyle = MGL_BITMAP_TRANSPARENT;
922 break;
923
924 case wxSTIPPLE:
925 if ( flag == wxMGL_SELECT_FROM_PEN )
926 pixPattern = (pixpattern24_t*) m_pen.GetPixPattern();
927 else
928 pixPattern = (pixpattern24_t*) m_brush.GetPixPattern();
929 penstyle = MGL_PIXMAP;
930 break;
931
932 case wxSTIPPLE_MASK_OPAQUE:
933 pattern = (pattern_t*) m_brush.GetMaskPattern();
934 penstyle = MGL_BITMAP_OPAQUE;
935 break;
936
937 case wxSOLID:
938 default:
939 penstyle = MGL_BITMAP_SOLID; break;
940 }
941
942 // ...and finally, pass the pen to MGL:
943
944 if ( pattern )
945 {
946 if ( !m_downloadedPatterns[slot] )
947 {
948 m_MGLDC->setPenBitmapPattern(slot, pattern);
949 m_downloadedPatterns[slot] = TRUE;
950 }
951 m_MGLDC->usePenBitmapPattern(slot);
952 }
953
954 if ( pixPattern )
955 {
956 if ( !m_downloadedPatterns[slot] )
957 {
958 pixpattern_t pix;
959 int x, y, c;
960
961 switch (GetDepth())
962 {
963 case 8:
964 for (y = 0; y < 8; y++)
965 for (x = 0; x < 8; x++)
966 pix.b8.p[x][y] = 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 15:
972 case 16:
973 for (y = 0; y < 8; y++)
974 for (x = 0; x < 8; x++)
975 pix.b16.p[x][y] = m_MGLDC->packColorFast(
976 pixPattern->p[x][y][0],
977 pixPattern->p[x][y][1],
978 pixPattern->p[x][y][2]);
979 break;
980 case 24:
981 for (y = 0; y < 8; y++)
982 for (x = 0; x < 8; x++)
983 for (c = 0; c < 3; c++)
984 pix.b24.p[x][y][c] = pixPattern->p[x][y][c];
985 break;
986 case 32:
987 for (y = 0; y < 8; y++)
988 for (x = 0; x < 8; x++)
989 pix.b32.p[x][y] = m_MGLDC->packColorFast(
990 pixPattern->p[x][y][0],
991 pixPattern->p[x][y][1],
992 pixPattern->p[x][y][2]);
993 break;
994 default:
995 wxFAIL_MSG(_T("invalid DC depth"));
996 break;
997 }
998 m_MGLDC->setPenPixmapPattern(slot, &pix);
999 m_downloadedPatterns[slot] = TRUE;
1000 }
1001 m_MGLDC->usePenPixmapPattern(slot);
1002 }
1003
1004 m_MGLDC->setLineStyle(MGL_LINE_PENSTYLE);
1005 m_MGLDC->setPenStyle(penstyle);
1006 m_MGLDC->setPenSize(wy, wx);
1007 }
1008
1009 void wxDC::SelectPen()
1010 {
1011 wxCHECK_RET( Ok(), wxT("invalid dc") );
1012
1013 wxColour& clr = m_pen.GetColour();
1014 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1015 m_MGLDC->setColorRGB(clr.Red(), clr.Green(), clr.Blue());
1016
1017 switch (m_pen.GetStyle())
1018 {
1019 case wxTRANSPARENT:
1020 break;
1021
1022 case wxDOT:
1023 case wxLONG_DASH:
1024 case wxSHORT_DASH:
1025 case wxDOT_DASH:
1026 SelectMGLStipplePen(m_pen.GetStyle());
1027 break;
1028
1029 case wxBDIAGONAL_HATCH:
1030 case wxCROSSDIAG_HATCH:
1031 case wxFDIAGONAL_HATCH:
1032 case wxCROSS_HATCH:
1033 case wxHORIZONTAL_HATCH:
1034 case wxVERTICAL_HATCH:
1035 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1036 break;
1037
1038 case wxSTIPPLE:
1039 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1040 break;
1041
1042 case wxSOLID:
1043 case wxUSER_DASH:
1044 default:
1045 if ( m_pen.GetWidth() <= 1 )
1046 SelectMGLStipplePen(wxSOLID);
1047 else
1048 SelectMGLFatPen(wxSOLID, wxMGL_SELECT_FROM_PEN);
1049 break;
1050 }
1051 m_penSelected = TRUE;
1052 m_brushSelected = FALSE;
1053 }
1054
1055 void wxDC::SelectBrush()
1056 {
1057 wxCHECK_RET( Ok(), wxT("invalid dc") );
1058
1059 wxColour fg, bg;
1060 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1061
1062 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
1063 {
1064 fg = m_textForegroundColour;
1065 bg = m_textBackgroundColour;
1066 }
1067 else
1068 {
1069 fg = m_brush.GetColour();
1070 bg = m_backgroundBrush.GetColour();
1071 }
1072
1073 m_MGLDC->setColorRGB(fg.Red(), fg.Green(), fg.Blue());
1074 m_MGLDC->setBackColor(m_MGLDC->packColorFast(bg.Red(), bg.Green(), bg.Blue()));
1075 m_penSelected = FALSE;
1076 m_brushSelected = TRUE;
1077
1078 SelectMGLFatPen(m_brush.GetStyle(), wxMGL_SELECT_FROM_BRUSH);
1079 }
1080
1081 void wxDC::SetPen(const wxPen& pen)
1082 {
1083 if ( !pen.Ok() ) return;
1084 if ( m_pen == pen ) return;
1085 m_pen = pen;
1086 m_penSelected = FALSE;
1087 m_downloadedPatterns[0] = FALSE;
1088 }
1089
1090 void wxDC::SetBrush(const wxBrush& brush)
1091 {
1092 if ( !brush.Ok() ) return;
1093 if ( m_brush == brush ) return;
1094 m_brush = brush;
1095 m_brushSelected = FALSE;
1096 m_downloadedPatterns[1] = FALSE;
1097 }
1098
1099 void wxDC::SetPalette(const wxPalette& palette)
1100 {
1101 wxCHECK_RET( Ok(), wxT("invalid dc") );
1102
1103 if ( palette == wxNullPalette )
1104 {
1105 if ( m_oldPalette.Ok() )
1106 SetPalette(m_oldPalette);
1107 return;
1108 }
1109
1110 if ( !palette.Ok() ) return;
1111 if ( m_palette == palette ) return;
1112 m_oldPalette = m_palette;
1113 m_palette = palette;
1114
1115 int cnt = m_palette.GetColoursCount();
1116 palette_t *pal = m_palette.GetMGLpalette_t();
1117 m_MGLDC->setPalette(pal, cnt, 0);
1118 m_MGLDC->realizePalette(cnt, 0, TRUE);
1119 }
1120
1121 void wxDC::SetFont(const wxFont& font)
1122 {
1123 if ( font.Ok() )
1124 {
1125 m_font = font;
1126 m_mglFont = NULL;
1127 }
1128 }
1129
1130 void wxDC::SetBackground(const wxBrush& brush)
1131 {
1132 wxCHECK_RET( Ok(), wxT("invalid dc") );
1133
1134 if (!m_backgroundBrush.Ok()) return;
1135
1136 m_backgroundBrush = brush;
1137 wxColour &clr = m_backgroundBrush.GetColour();
1138 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1139 m_MGLDC->setBackColor(
1140 m_MGLDC->packColorFast(clr.Red(), clr.Green(), clr.Blue()));
1141 }
1142
1143 void wxDC::SetBackgroundMode(int mode)
1144 {
1145 m_backgroundMode = mode;
1146 if ( mode == wxSOLID )
1147 m_MGLDC->setBackMode(MGL_OPAQUE_BACKGROUND);
1148 else
1149 m_MGLDC->setBackMode(MGL_TRANSPARENT_BACKGROUND);
1150 }
1151
1152 void wxDC::SetLogicalFunction(int function)
1153 {
1154 wxCHECK_RET( Ok(), wxT("invalid dc") );
1155
1156 m_logicalFunction = function;
1157
1158 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1159 m_MGLDC->setWriteMode(LogicalFunctionToMGLRop(m_logicalFunction));
1160 }
1161
1162 int wxDC::LogicalFunctionToMGLRop(int logFunc) const
1163 {
1164 MGL_writeModeType rop;
1165
1166 switch (logFunc)
1167 {
1168 case wxCLEAR: rop = MGL_R2_BLACK; break;
1169 case wxXOR: rop = MGL_R2_XORSRC; break;
1170 case wxINVERT: rop = MGL_R2_NOT; break;
1171 case wxOR_REVERSE: rop = MGL_R2_MERGESRCNOT; break;
1172 case wxAND_REVERSE: rop = MGL_R2_MASKSRCNOT; break;
1173 case wxCOPY: rop = MGL_R2_COPYSRC; break;
1174 case wxAND: rop = MGL_R2_MASKSRC; break;
1175 case wxAND_INVERT: rop = MGL_R2_MASKNOTSRC; break;
1176 case wxNO_OP: rop = MGL_R2_NOP; break;
1177 case wxNOR: rop = MGL_R2_NOTMERGESRC; break;
1178 case wxEQUIV: rop = MGL_R2_NOTXORSRC; break;
1179 case wxSRC_INVERT: rop = MGL_R2_NOTCOPYSRC; break;
1180 case wxOR_INVERT: rop = MGL_R2_MERGENOTSRC; break;
1181 case wxNAND: rop = MGL_R2_NOTMASKSRC; break;
1182 case wxOR: rop = MGL_R2_MERGESRC; break;
1183 case wxSET: rop = MGL_R2_WHITE; break;
1184 default:
1185 wxFAIL_MSG( wxT("unsupported logical function") );
1186 return MGL_REPLACE_MODE;
1187 }
1188 return (int)rop;
1189 }
1190
1191 bool wxDC::StartDoc(const wxString& message)
1192 {
1193 // We might be previewing, so return TRUE to let it continue.
1194 return TRUE;
1195 }
1196
1197 void wxDC::EndDoc()
1198 {
1199 }
1200
1201 void wxDC::StartPage()
1202 {
1203 }
1204
1205 void wxDC::EndPage()
1206 {
1207 }
1208
1209 // ---------------------------------------------------------------------------
1210 // text metrics
1211 // ---------------------------------------------------------------------------
1212
1213 wxCoord wxDC::GetCharHeight() const
1214 {
1215 wxCurrentDCSwitcher switcher(m_MGLDC);
1216 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1217 return YDEV2LOGREL(m_mglFont->fontHeight);
1218 }
1219
1220 wxCoord wxDC::GetCharWidth() const
1221 {
1222 wxCurrentDCSwitcher switcher(m_MGLDC);
1223 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1224 // VS: wxT() is intentional, charWidth() has both char and wchar_t version
1225 // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
1226 // scaled according to m_scaleY
1227 return YDEV2LOGREL(m_mglFont->fontWidth);
1228 }
1229
1230 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1231 wxCoord *descent, wxCoord *externalLeading,
1232 wxFont *theFont) const
1233 {
1234 wxFont oldFont;
1235
1236 if ( theFont != NULL )
1237 {
1238 oldFont = m_font;
1239 wxConstCast(this, wxDC)->SetFont(*theFont);
1240 }
1241
1242 wxCurrentDCSwitcher switcher(m_MGLDC);
1243 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return;
1244
1245 if ( x )
1246 // VS: YDEV is corrent, it should *not* be XDEV, because font's are
1247 // only scaled according to m_scaleY
1248 *x = YDEV2LOGREL(m_MGLDC->textWidth(string.c_str()));
1249 if ( y )
1250 *y = YDEV2LOGREL(m_MGLDC->textHeight());
1251 if ( descent )
1252 *descent = YDEV2LOGREL(m_mglFont->descent);
1253 if ( externalLeading )
1254 *externalLeading = YDEV2LOGREL(m_mglFont->leading);
1255
1256 if ( theFont != NULL )
1257 wxConstCast(this, wxDC)->SetFont(oldFont);
1258 }
1259
1260
1261
1262 // ---------------------------------------------------------------------------
1263 // mapping modes
1264 // ---------------------------------------------------------------------------
1265
1266 void wxDC::ComputeScaleAndOrigin()
1267 {
1268 double newX = m_logicalScaleX * m_userScaleX;
1269 double newY = m_logicalScaleY * m_userScaleY;
1270
1271 // make sure font will be reloaded before drawing:
1272 if ( newY != m_scaleY )
1273 m_mglFont = NULL;
1274 // make sure m_penOfs{X,Y} will be reevaluated before drawing:
1275 if ( newY != m_scaleY || newX != m_scaleX )
1276 m_penSelected = FALSE;
1277
1278 m_scaleX = newX, m_scaleY = newY;
1279 }
1280
1281 void wxDC::SetMapMode(int mode)
1282 {
1283 switch (mode)
1284 {
1285 case wxMM_TWIPS:
1286 SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
1287 break;
1288 case wxMM_POINTS:
1289 SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
1290 break;
1291 case wxMM_METRIC:
1292 SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
1293 break;
1294 case wxMM_LOMETRIC:
1295 SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
1296 break;
1297 default:
1298 case wxMM_TEXT:
1299 SetLogicalScale(1.0, 1.0);
1300 break;
1301 }
1302 m_mappingMode = mode;
1303 }
1304
1305 void wxDC::SetUserScale( double x, double y )
1306 {
1307 // allow negative ? -> no
1308 m_userScaleX = x;
1309 m_userScaleY = y;
1310 ComputeScaleAndOrigin();
1311 }
1312
1313 void wxDC::SetLogicalScale( double x, double y )
1314 {
1315 // allow negative ?
1316 m_logicalScaleX = x;
1317 m_logicalScaleY = y;
1318 ComputeScaleAndOrigin();
1319 }
1320
1321 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
1322 {
1323 m_logicalOriginX = x * m_signX; // is this still correct ?
1324 m_logicalOriginY = y * m_signY;
1325 ComputeScaleAndOrigin();
1326 }
1327
1328 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
1329 {
1330 // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
1331 m_deviceOriginX = x;
1332 m_deviceOriginY = y;
1333 ComputeScaleAndOrigin();
1334 }
1335
1336 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
1337 {
1338 // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
1339 m_signX = (xLeftRight ? 1 : -1);
1340 m_signY = (yBottomUp ? -1 : 1);
1341 ComputeScaleAndOrigin();
1342 }
1343
1344 // ---------------------------------------------------------------------------
1345 // coordinates transformations
1346 // ---------------------------------------------------------------------------
1347
1348 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1349 {
1350 return ((wxDC *)this)->XDEV2LOG(x);
1351 }
1352
1353 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1354 {
1355 return ((wxDC *)this)->YDEV2LOG(y);
1356 }
1357
1358 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1359 {
1360 return ((wxDC *)this)->XDEV2LOGREL(x);
1361 }
1362
1363 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1364 {
1365 return ((wxDC *)this)->YDEV2LOGREL(y);
1366 }
1367
1368 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1369 {
1370 return ((wxDC *)this)->XLOG2DEV(x);
1371 }
1372
1373 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1374 {
1375 return ((wxDC *)this)->YLOG2DEV(y);
1376 }
1377
1378 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1379 {
1380 return ((wxDC *)this)->XLOG2DEVREL(x);
1381 }
1382
1383 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1384 {
1385 return ((wxDC *)this)->YLOG2DEVREL(y);
1386 }
1387
1388
1389 void wxDC::DoGetSize(int *w, int *h) const
1390 {
1391 if (w) *w = m_MGLDC->sizex()+1;
1392 if (h) *h = m_MGLDC->sizey()+1;
1393 }
1394
1395 void wxDC::DoGetSizeMM(int *width, int *height) const
1396 {
1397 int w = 0;
1398 int h = 0;
1399 GetSize(&w, &h);
1400 if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
1401 if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
1402 }
1403
1404 wxSize wxDC::GetPPI() const
1405 {
1406 return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
1407 int(double(m_mm_to_pix_y) * inches2mm));
1408 }
1409
1410
1411 // ---------------------------------------------------------------------------
1412 // Blitting
1413 // ---------------------------------------------------------------------------
1414
1415 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1416 wxCoord width, wxCoord height,
1417 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1418 int rop, bool useMask,
1419 wxCoord xsrcMask, wxCoord ysrcMask)
1420 {
1421 wxCHECK_MSG( Ok(), FALSE, wxT("invalid dc") );
1422 wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
1423
1424 // transform the source DC coords to the device ones
1425 xsrc = source->LogicalToDeviceX(xsrc);
1426 ysrc = source->LogicalToDeviceY(ysrc);
1427
1428 /* FIXME_MGL: use the mask origin when drawing transparently */
1429 if (xsrcMask == -1 && ysrcMask == -1)
1430 {
1431 xsrcMask = xsrc; ysrcMask = ysrc;
1432 }
1433 else
1434 {
1435 xsrcMask = source->LogicalToDeviceX(xsrcMask);
1436 ysrcMask = source->LogicalToDeviceY(ysrcMask);
1437 }
1438
1439 CalcBoundingBox(xdest, ydest);
1440 CalcBoundingBox(xdest + width, ydest + height);
1441
1442 /* scale/translate size and position */
1443 wxCoord xx = XLOG2DEV(xdest);
1444 wxCoord yy = YLOG2DEV(ydest);
1445 wxCoord ww = XLOG2DEVREL(width);
1446 wxCoord hh = YLOG2DEVREL(height);
1447
1448 if ( source->m_isMemDC )
1449 {
1450 wxMemoryDC *memDC = (wxMemoryDC*) source;
1451 DoDrawSubBitmap(memDC->GetSelectedObject(), xsrc, ysrc, ww, hh,
1452 xdest, ydest, rop, useMask);
1453 }
1454 else
1455 {
1456 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1457 m_MGLDC->bitBlt(*source->GetMGLDC(),
1458 xsrc, ysrc, xsrc + ww, ysrc + hh,
1459 xx, yy, LogicalFunctionToMGLRop(rop));
1460 }
1461
1462 return TRUE;
1463 }
1464
1465 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
1466 {
1467 wxCHECK_RET( Ok(), wxT("invalid dc") );
1468 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1469
1470 wxCoord w = bmp.GetWidth();
1471 wxCoord h = bmp.GetHeight();
1472
1473 DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
1474 }
1475
1476 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
1477 {
1478 // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
1479 DoDrawBitmap((const wxBitmap&)icon, x, y, (bool)TRUE);
1480 }
1481
1482
1483 static inline void DoBitBlt(const wxBitmap& src, MGLDevCtx *dst,
1484 int sx, int sy, int sw, int sh,
1485 int dx, int dy, int dw, int dh,
1486 int rop, bool useStretching, bool putSection)
1487 {
1488 bitmap_t *bmp = src.GetMGLbitmap_t();
1489 if (!useStretching)
1490 {
1491 if (!putSection)
1492 dst->putBitmap(dx, dy, bmp, rop);
1493 else
1494 dst->putBitmapSection(sx, sy, sx + sw, sy + sh, dx, dy, bmp, rop);
1495 }
1496 else
1497 {
1498 if (!putSection)
1499 dst->stretchBitmap(dx, dy, dx + dw, dy + dh, bmp, rop);
1500 else
1501 dst->stretchBitmapSection(sx, sy, sx + sw, sy + sh,
1502 dx, dy, dx + dw, dy + dh, bmp, rop);
1503 }
1504 }
1505
1506 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
1507 wxCoord x, wxCoord y, wxCoord w, wxCoord h,
1508 wxCoord destx, wxCoord desty, int rop, bool useMask)
1509 {
1510 wxCHECK_RET( Ok(), wxT("invalid dc") );
1511 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1512
1513 CalcBoundingBox(x, y);
1514 CalcBoundingBox(x + w, y + h);
1515
1516 wxCoord dx = XLOG2DEV(destx);
1517 wxCoord dy = YLOG2DEV(desty);
1518 wxCoord dw = XLOG2DEVREL(w);
1519 wxCoord dh = YLOG2DEVREL(h);
1520
1521 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1522
1523 bool useStretching = ((w != dw) || (h != dh));
1524 bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
1525 MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
1526
1527 if ( bmp.GetDepth() == 1 )
1528 {
1529 // Mono bitmaps are handled in special way -- all 1s are drawn in
1530 // foreground colours, all 0s in background colour.
1531
1532 ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
1533 }
1534
1535 if ( useMask && bmp.GetMask() )
1536 {
1537 // Since MGL does not support masks directly (in MGL, mask is handled
1538 // in same way as in wxImage, i.e. there is one "key" color), we
1539 // simulate masked bitblt in 6 steps (same as in MSW):
1540 //
1541 // 1. Create a temporary bitmap and copy the destination area into it.
1542 // 2. Copy the source area into the temporary bitmap using the
1543 // specified logical function.
1544 // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
1545 // the mask bitmap with the temp bitmap with the foreground colour
1546 // set to WHITE and the bg colour set to BLACK.
1547 // 4. Set the unmasked area in the destination area to BLACK by
1548 // ANDing the mask bitmap with the destination area with the
1549 // foreground colour set to BLACK and the background colour set
1550 // to WHITE.
1551 // 5. OR the temporary bitmap with the destination area.
1552 // 6. Delete the temporary bitmap.
1553 //
1554 // This sequence of operations ensures that the source's transparent
1555 // area need not be black, and logical functions are supported.
1556
1557 wxBitmap *mask = bmp.GetMask()->GetBitmap();
1558
1559 MGLMemoryDC *temp;
1560
1561 if ( GetDepth() <= 8 )
1562 {
1563 temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
1564 wxDC tempdc;
1565 tempdc.SetMGLDC(temp, FALSE);
1566 tempdc.SetPalette(m_palette);
1567 }
1568 else
1569 {
1570 pixel_format_t pf;
1571 m_MGLDC->getPixelFormat(pf);
1572 temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
1573 }
1574
1575 wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
1576
1577 temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
1578
1579 DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
1580 useStretching, putSection);
1581
1582 mask->SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
1583 DoBitBlt(*mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
1584 useStretching, putSection);
1585 DoBitBlt(*mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
1586 useStretching, putSection);
1587
1588 m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
1589
1590 delete temp;
1591 }
1592
1593 else
1594 {
1595 DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
1596 useStretching, putSection);
1597 }
1598 }
wxWidgets (Impactor)