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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 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 m_MGLDC->rect(xx + m_penOfsX, yy + m_penOfsY,
561 xx + ww + m_penOfsX, yy + hh + m_penOfsY);
562 }
563
564 CalcBoundingBox(x, y);
565 CalcBoundingBox(x + width, y + height);
566 }
567
568 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
569 {
570 wxCHECK_RET( Ok(), wxT("invalid dc") );
571
572 if ( radius < 0.0 )
573 radius = -radius * ((width < height) ? width : height);
574
575 wxCoord xx = XLOG2DEV(x);
576 wxCoord yy = YLOG2DEV(y);
577 wxCoord ww = m_signX * XLOG2DEVREL(width);
578 wxCoord hh = m_signY * YLOG2DEVREL(height);
579 wxCoord rr = XLOG2DEVREL((wxCoord)radius);
580
581 // CMB: handle -ve width and/or height
582 if ( ww < 0 )
583 {
584 ww = -ww;
585 xx = xx - ww;
586 }
587 if ( hh < 0 )
588 {
589 hh = -hh;
590 yy = yy - hh;
591 }
592
593 // CMB: if radius is zero use DrawRectangle() instead to avoid
594 // X drawing errors with small radii
595 if ( rr == 0 )
596 {
597 DrawRectangle(x, y, width, height);
598 return;
599 }
600
601 // CMB: draw nothing if transformed w or h is 0
602 if ( ww == 0 || hh == 0 ) return;
603
604 // CMB: ensure dd is not larger than rectangle otherwise we
605 // get an hour glass shape
606 wxCoord dd = 2 * rr;
607 if ( dd > ww ) dd = ww;
608 if ( dd > hh ) dd = hh;
609 rr = dd / 2;
610
611 m_MGLDC->makeCurrent(); // will go away with MGL6.0
612 if ( m_brush.GetStyle() != wxTRANSPARENT )
613 {
614 if (!m_brushSelected)
615 SelectBrush();
616 m_MGLDC->fillRect(xx+rr, yy, xx+ww-rr, yy+hh);
617 m_MGLDC->fillRect(xx, yy+rr, xx+ww, yy+hh-rr);
618 m_MGLDC->fillEllipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
619 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
620 m_MGLDC->fillEllipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
621 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
622 }
623
624 if ( m_pen.GetStyle() != wxTRANSPARENT )
625 {
626 if ( !m_penSelected )
627 SelectPen();
628 xx += m_penOfsX;
629 yy += m_penOfsY;
630 m_MGLDC->line(xx+rr+1, yy, xx+ww-rr, yy);
631 m_MGLDC->ellipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
632 m_MGLDC->line(xx+ww, yy+rr+1, xx+ww, yy+hh-rr);
633 m_MGLDC->ellipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
634 m_MGLDC->line(xx+ww-rr, yy+hh, xx+rr+1, yy+hh);
635 m_MGLDC->ellipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
636 m_MGLDC->line(xx, yy+hh-rr, xx, yy+rr+1);
637 m_MGLDC->ellipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
638 }
639
640 CalcBoundingBox(x, y);
641 CalcBoundingBox(x + width, y + height);
642 }
643
644 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
645 {
646 wxCHECK_RET( Ok(), wxT("invalid dc") );
647
648 wxCoord x2 = (x+width);
649 wxCoord y2 = (y+height);
650
651 m_MGLDC->makeCurrent(); // will go away with MGL6.0
652 if ( m_brush.GetStyle() != wxTRANSPARENT )
653 {
654 if ( !m_brushSelected )
655 SelectBrush();
656 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
657 m_MGLDC->fillEllipse(rect);
658 }
659
660 if ( m_pen.GetStyle() != wxTRANSPARENT )
661 {
662 if ( !m_penSelected )
663 SelectPen();
664 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
665 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
666 m_MGLDC->ellipse(rect);
667 }
668
669 CalcBoundingBox(x, y);
670 CalcBoundingBox(x2, y2);
671 }
672
673 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
674 {
675 wxCHECK_RET( Ok(), wxT("invalid dc") );
676
677 wxCoord x2 = (x+w);
678 wxCoord y2 = (y+h);
679
680 m_MGLDC->makeCurrent(); // will go away with MGL6.0
681 if ( m_brush.GetStyle() != wxTRANSPARENT )
682 {
683 if (!m_brushSelected) SelectBrush();
684 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
685 m_MGLDC->fillEllipseArc(rect, (int)sa, (int)ea);
686 }
687
688 if ( m_pen.GetStyle() != wxTRANSPARENT )
689 {
690 if ( !m_penSelected )
691 SelectPen();
692 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
693 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
694 m_MGLDC->ellipseArc(rect, (int)sa, (int)ea);
695 }
696
697 CalcBoundingBox(x, y);
698 CalcBoundingBox(x2, y2);
699 }
700
701 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
702 {
703 m_MGLDC->makeCurrent(); // will go away with MGL6.0
704 DrawAnyText(text, x, y);
705
706 // update the bounding box
707 wxCoord w, h;
708 CalcBoundingBox(x, y);
709 GetTextExtent(text, &w, &h);
710 CalcBoundingBox(x + w, y + h);
711 }
712
713 bool wxDC::SelectMGLFont()
714 {
715 if ( m_mglFont == NULL )
716 {
717 float scale = m_scaleY;
718 bool antialiased = (GetDepth() > 8);
719
720 m_mglFont = m_font.GetMGLfont_t(scale, antialiased);
721 wxCHECK_MSG( m_mglFont, FALSE, wxT("invalid font") );
722
723 m_MGLDC->useFont(m_mglFont);
724 wxLogTrace("mgl_font", "useFont(%p)", m_mglFont);
725
726 #if !wxUSE_UNICODE
727 wxNativeEncodingInfo nativeEnc;
728 wxFontEncoding encoding = m_font.GetEncoding();
729 if ( !wxGetNativeFontEncoding(encoding, &nativeEnc) ||
730 !wxTestFontEncoding(nativeEnc) )
731 {
732 #if wxUSE_FONTMAP
733 if ( !wxTheFontMapper->GetAltForEncoding(encoding, &nativeEnc) )
734 #endif
735 {
736 nativeEnc.mglEncoding = MGL_ENCODING_ASCII;
737 }
738 }
739 m_MGLDC->setTextEncoding(nativeEnc.mglEncoding);
740 #endif
741 }
742 return TRUE;
743 }
744
745 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
746 {
747 wxCHECK_RET( Ok(), wxT("invalid dc") );
748
749 SelectMGLFont();
750
751 // Render the text:
752 wxCoord xx = XLOG2DEV(x);
753 wxCoord yy = YLOG2DEV(y);
754
755 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
756 m_MGLDC->setLineStipple(0xFFFF);
757 m_MGLDC->setPenSize(1, 1);
758 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
759
760 #if wxUSE_UNICODE
761 const wchar_t *c_text = text.c_str();
762 #else
763 const char *c_text = text.c_str();
764 #endif
765
766 #if 1
767 // FIXME_MGL - this is a temporary hack in absence of proper
768 // implementation of solid text background in MGL. Once
769 // the bug in MGL is fixed, this code should be nuked
770 // immediately. Note that the code is not 100% correct;
771 // it only works with wxCOPY logical function
772 if ( m_backgroundMode == wxSOLID )
773 {
774 int w = m_MGLDC->textWidth(c_text);
775 int h = m_MGLDC->textHeight();
776 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
777 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
778 m_MGLDC->fillRect(xx, yy, xx+w, yy+h);
779 }
780 #endif
781
782 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textForegroundColour.Red(),
783 m_textForegroundColour.Green(), m_textForegroundColour.Blue()));
784 m_MGLDC->setBackColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
785 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
786
787 m_MGLDC->drawStr(xx, yy, c_text);
788
789 // Render underline:
790 if ( m_font.GetUnderlined() )
791 {
792 int x1 = xx, y1 = yy;
793 int x2 = 0 , y2 = 0;
794 int w = m_MGLDC->textWidth(c_text);
795 m_MGLDC->underScoreLocation(x1, y1, c_text);
796 switch (m_MGLDC->getTextDirection())
797 {
798 case MGL_RIGHT_DIR: x2 = x1 + w, y2 = y1; break;
799 case MGL_LEFT_DIR: x2 = x1 - w, y2 = y1; break;
800 case MGL_UP_DIR: x2 = x1, y2 = y1 - w; break;
801 case MGL_DOWN_DIR: x2 = x1, y2 = y1 + w; break;
802 }
803 m_MGLDC->line(x1, y1, x2, y2);
804 }
805
806 m_penSelected = m_brushSelected = FALSE;
807 }
808
809 void wxDC::DoDrawRotatedText(const wxString& text,
810 wxCoord x, wxCoord y,
811 double angle)
812 {
813 m_MGLDC->makeCurrent(); // will go away with MGL6.0
814
815 if ( angle == 0 )
816 {
817 DoDrawText(text, x, y);
818 return;
819 }
820 else if ( angle == 90.0 )
821 m_MGLDC->setTextDirection(MGL_UP_DIR);
822 else if ( angle == 180.0 )
823 m_MGLDC->setTextDirection(MGL_LEFT_DIR);
824 else if ( angle == 270.0 )
825 m_MGLDC->setTextDirection(MGL_DOWN_DIR);
826 else
827 {
828 // FIXME_MGL -- implement once MGL supports it
829 wxFAIL_MSG(wxT("wxMGL only supports rotated text with angle 0,90,180 or 270"));
830 return;
831 }
832
833 DrawAnyText(text, x, y);
834
835 // Restore default:
836 m_MGLDC->setTextDirection(MGL_RIGHT_DIR);
837 }
838
839 // ---------------------------------------------------------------------------
840 // set GDI objects
841 // ---------------------------------------------------------------------------
842
843 void wxDC::SelectMGLStipplePen(int style)
844 {
845 ushort stipple;
846
847 switch (style)
848 {
849 case wxDOT: stipple = STIPPLE_wxDOT; break;
850 case wxLONG_DASH: stipple = STIPPLE_wxLONG_DASH; break;
851 case wxSHORT_DASH: stipple = STIPPLE_wxSHORT_DASH; break;
852 case wxDOT_DASH: stipple = STIPPLE_wxDOT_DASH; break;
853 default: stipple = STIPPLE_wxSOLID; break;
854 }
855
856 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
857 m_MGLDC->setLineStipple(stipple);
858 m_MGLDC->setPenSize(1, 1);
859 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
860 m_penOfsY = m_penOfsX = 0;
861 }
862
863 // Accepted valus of SelectMGLFatPen's 2nd argument
864 enum {
865 wxMGL_SELECT_FROM_PEN,
866 wxMGL_SELECT_FROM_BRUSH
867 };
868
869 void wxDC::SelectMGLFatPen(int style, int flag)
870 {
871 MGL_penStyleType penstyle;
872 const pattern_t *pattern = NULL;
873 pixpattern24_t *pixPattern = NULL;
874 int wx, wy;
875 int slot;
876
877 // Since MGL pens may be created from wxBrush or wxPen and we often
878 // switch between pens and brushes, we take advantage of MGL's ability
879 // to have multiple (pix)pattern_t's loaded. We always download pen
880 // to 0th slot and brush to 1st slot.
881 if ( flag == wxMGL_SELECT_FROM_PEN )
882 slot = 0;
883 else
884 slot = 1;
885
886 // compute pen's width:
887 if ( m_pen.GetWidth() <= 1 )
888 {
889 wx = wy = 1;
890 m_penOfsX = m_penOfsY = 0;
891 }
892 else
893 {
894 wx = (int)(0.5 + fabs((double) XLOG2DEVREL(m_pen.GetWidth())));
895 wy = (int)(0.5 + fabs((double) YLOG2DEVREL(m_pen.GetWidth())));
896 m_penOfsX = -wx/2;
897 m_penOfsY = -wy/2;
898 }
899
900 // find pen's type:
901 penstyle = MGL_BITMAP_TRANSPARENT;
902 switch (style)
903 {
904 case wxBDIAGONAL_HATCH: pattern = &PATTERN_wxBDIAGONAL_HATCH;
905 penstyle = MGL_BITMAP_TRANSPARENT;
906 break;
907 case wxCROSSDIAG_HATCH: pattern = &PATTERN_wxCROSSDIAG_HATCH;
908 penstyle = MGL_BITMAP_TRANSPARENT;
909 break;
910 case wxFDIAGONAL_HATCH: pattern = &PATTERN_wxFDIAGONAL_HATCH;
911 penstyle = MGL_BITMAP_TRANSPARENT;
912 break;
913 case wxCROSS_HATCH: pattern = &PATTERN_wxCROSS_HATCH;
914 penstyle = MGL_BITMAP_TRANSPARENT;
915 break;
916 case wxHORIZONTAL_HATCH: pattern = &PATTERN_wxHORIZONTAL_HATCH;
917 penstyle = MGL_BITMAP_TRANSPARENT;
918 break;
919 case wxVERTICAL_HATCH: pattern = &PATTERN_wxVERTICAL_HATCH;
920 penstyle = MGL_BITMAP_TRANSPARENT;
921 break;
922
923 case wxSTIPPLE:
924 if ( flag == wxMGL_SELECT_FROM_PEN )
925 pixPattern = (pixpattern24_t*) m_pen.GetPixPattern();
926 else
927 pixPattern = (pixpattern24_t*) m_brush.GetPixPattern();
928 penstyle = MGL_PIXMAP;
929 break;
930
931 case wxSTIPPLE_MASK_OPAQUE:
932 pattern = (pattern_t*) m_brush.GetMaskPattern();
933 penstyle = MGL_BITMAP_OPAQUE;
934 break;
935
936 case wxSOLID:
937 default:
938 penstyle = MGL_BITMAP_SOLID; break;
939 }
940
941 // ...and finally, pass the pen to MGL:
942
943 if ( pattern )
944 {
945 if ( !m_downloadedPatterns[slot] )
946 {
947 m_MGLDC->setPenBitmapPattern(slot, pattern);
948 m_downloadedPatterns[slot] = TRUE;
949 }
950 m_MGLDC->usePenBitmapPattern(slot);
951 }
952
953 if ( pixPattern )
954 {
955 if ( !m_downloadedPatterns[slot] )
956 {
957 pixpattern_t pix;
958 int x, y, c;
959
960 switch (GetDepth())
961 {
962 case 8:
963 for (y = 0; y < 8; y++)
964 for (x = 0; x < 8; x++)
965 pix.b8.p[x][y] = m_MGLDC->packColorFast(
966 pixPattern->p[x][y][0],
967 pixPattern->p[x][y][1],
968 pixPattern->p[x][y][2]);
969 break;
970 case 15:
971 case 16:
972 for (y = 0; y < 8; y++)
973 for (x = 0; x < 8; x++)
974 pix.b16.p[x][y] = m_MGLDC->packColorFast(
975 pixPattern->p[x][y][0],
976 pixPattern->p[x][y][1],
977 pixPattern->p[x][y][2]);
978 break;
979 case 24:
980 for (y = 0; y < 8; y++)
981 for (x = 0; x < 8; x++)
982 for (c = 0; c < 3; c++)
983 pix.b24.p[x][y][c] = pixPattern->p[x][y][c];
984 break;
985 case 32:
986 for (y = 0; y < 8; y++)
987 for (x = 0; x < 8; x++)
988 pix.b32.p[x][y] = m_MGLDC->packColorFast(
989 pixPattern->p[x][y][0],
990 pixPattern->p[x][y][1],
991 pixPattern->p[x][y][2]);
992 break;
993 default:
994 wxFAIL_MSG(_T("invalid DC depth"));
995 break;
996 }
997 m_MGLDC->setPenPixmapPattern(slot, &pix);
998 m_downloadedPatterns[slot] = TRUE;
999 }
1000 m_MGLDC->usePenPixmapPattern(slot);
1001 }
1002
1003 m_MGLDC->setLineStyle(MGL_LINE_PENSTYLE);
1004 m_MGLDC->setPenStyle(penstyle);
1005 m_MGLDC->setPenSize(wy, wx);
1006 }
1007
1008 void wxDC::SelectPen()
1009 {
1010 wxCHECK_RET( Ok(), wxT("invalid dc") );
1011
1012 wxColour& clr = m_pen.GetColour();
1013 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1014 m_MGLDC->setColorRGB(clr.Red(), clr.Green(), clr.Blue());
1015
1016 switch (m_pen.GetStyle())
1017 {
1018 case wxTRANSPARENT:
1019 break;
1020
1021 case wxDOT:
1022 case wxLONG_DASH:
1023 case wxSHORT_DASH:
1024 case wxDOT_DASH:
1025 SelectMGLStipplePen(m_pen.GetStyle());
1026 break;
1027
1028 case wxBDIAGONAL_HATCH:
1029 case wxCROSSDIAG_HATCH:
1030 case wxFDIAGONAL_HATCH:
1031 case wxCROSS_HATCH:
1032 case wxHORIZONTAL_HATCH:
1033 case wxVERTICAL_HATCH:
1034 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1035 break;
1036
1037 case wxSTIPPLE:
1038 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1039 break;
1040
1041 case wxSOLID:
1042 case wxUSER_DASH:
1043 default:
1044 if ( m_pen.GetWidth() <= 1 )
1045 SelectMGLStipplePen(wxSOLID);
1046 else
1047 SelectMGLFatPen(wxSOLID, wxMGL_SELECT_FROM_PEN);
1048 break;
1049 }
1050 m_penSelected = TRUE;
1051 m_brushSelected = FALSE;
1052 }
1053
1054 void wxDC::SelectBrush()
1055 {
1056 wxCHECK_RET( Ok(), wxT("invalid dc") );
1057
1058 wxColour fg, bg;
1059 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1060
1061 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
1062 {
1063 fg = m_textForegroundColour;
1064 bg = m_textBackgroundColour;
1065 }
1066 else
1067 {
1068 fg = m_brush.GetColour();
1069 bg = m_backgroundBrush.GetColour();
1070 }
1071
1072 m_MGLDC->setColorRGB(fg.Red(), fg.Green(), fg.Blue());
1073 m_MGLDC->setBackColor(m_MGLDC->packColorFast(bg.Red(), bg.Green(), bg.Blue()));
1074 m_penSelected = FALSE;
1075 m_brushSelected = TRUE;
1076
1077 SelectMGLFatPen(m_brush.GetStyle(), wxMGL_SELECT_FROM_BRUSH);
1078 }
1079
1080 void wxDC::SetPen(const wxPen& pen)
1081 {
1082 if ( !pen.Ok() ) return;
1083 if ( m_pen == pen ) return;
1084 m_pen = pen;
1085 m_penSelected = FALSE;
1086 m_downloadedPatterns[0] = FALSE;
1087 }
1088
1089 void wxDC::SetBrush(const wxBrush& brush)
1090 {
1091 if ( !brush.Ok() ) return;
1092 if ( m_brush == brush ) return;
1093 m_brush = brush;
1094 m_brushSelected = FALSE;
1095 m_downloadedPatterns[1] = FALSE;
1096 }
1097
1098 void wxDC::SetPalette(const wxPalette& palette)
1099 {
1100 wxCHECK_RET( Ok(), wxT("invalid dc") );
1101
1102 if ( palette == wxNullPalette )
1103 {
1104 if ( m_oldPalette.Ok() )
1105 SetPalette(m_oldPalette);
1106 return;
1107 }
1108
1109 if ( !palette.Ok() ) return;
1110 if ( m_palette == palette ) return;
1111 m_oldPalette = m_palette;
1112 m_palette = palette;
1113
1114 int cnt = m_palette.GetColoursCount();
1115 palette_t *pal = m_palette.GetMGLpalette_t();
1116 m_MGLDC->setPalette(pal, cnt, 0);
1117 m_MGLDC->realizePalette(cnt, 0, TRUE);
1118 }
1119
1120 void wxDC::SetFont(const wxFont& font)
1121 {
1122 if ( font.Ok() )
1123 {
1124 m_font = font;
1125 m_mglFont = NULL;
1126 }
1127 }
1128
1129 void wxDC::SetBackground(const wxBrush& brush)
1130 {
1131 wxCHECK_RET( Ok(), wxT("invalid dc") );
1132
1133 if (!m_backgroundBrush.Ok()) return;
1134
1135 m_backgroundBrush = brush;
1136 wxColour &clr = m_backgroundBrush.GetColour();
1137 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1138 m_MGLDC->setBackColor(
1139 m_MGLDC->packColorFast(clr.Red(), clr.Green(), clr.Blue()));
1140 }
1141
1142 void wxDC::SetBackgroundMode(int mode)
1143 {
1144 m_backgroundMode = mode;
1145 if ( mode == wxSOLID )
1146 m_MGLDC->setBackMode(MGL_OPAQUE_BACKGROUND);
1147 else
1148 m_MGLDC->setBackMode(MGL_TRANSPARENT_BACKGROUND);
1149 }
1150
1151 void wxDC::SetLogicalFunction(int function)
1152 {
1153 wxCHECK_RET( Ok(), wxT("invalid dc") );
1154
1155 m_logicalFunction = function;
1156
1157 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1158 m_MGLDC->setWriteMode(LogicalFunctionToMGLRop(m_logicalFunction));
1159 }
1160
1161 int wxDC::LogicalFunctionToMGLRop(int logFunc) const
1162 {
1163 MGL_writeModeType rop;
1164
1165 switch (logFunc)
1166 {
1167 case wxCLEAR: rop = MGL_R2_BLACK; break;
1168 case wxXOR: rop = MGL_R2_XORSRC; break;
1169 case wxINVERT: rop = MGL_R2_NOT; break;
1170 case wxOR_REVERSE: rop = MGL_R2_MERGESRCNOT; break;
1171 case wxAND_REVERSE: rop = MGL_R2_MASKSRCNOT; break;
1172 case wxCOPY: rop = MGL_R2_COPYSRC; break;
1173 case wxAND: rop = MGL_R2_MASKSRC; break;
1174 case wxAND_INVERT: rop = MGL_R2_MASKNOTSRC; break;
1175 case wxNO_OP: rop = MGL_R2_NOP; break;
1176 case wxNOR: rop = MGL_R2_NOTMERGESRC; break;
1177 case wxEQUIV: rop = MGL_R2_NOTXORSRC; break;
1178 case wxSRC_INVERT: rop = MGL_R2_NOTCOPYSRC; break;
1179 case wxOR_INVERT: rop = MGL_R2_MERGENOTSRC; break;
1180 case wxNAND: rop = MGL_R2_NOTMASKSRC; break;
1181 case wxOR: rop = MGL_R2_MERGESRC; break;
1182 case wxSET: rop = MGL_R2_WHITE; break;
1183 default:
1184 wxFAIL_MSG( wxT("unsupported logical function") );
1185 return MGL_REPLACE_MODE;
1186 }
1187 return (int)rop;
1188 }
1189
1190 bool wxDC::StartDoc(const wxString& message)
1191 {
1192 // We might be previewing, so return TRUE to let it continue.
1193 return TRUE;
1194 }
1195
1196 void wxDC::EndDoc()
1197 {
1198 }
1199
1200 void wxDC::StartPage()
1201 {
1202 }
1203
1204 void wxDC::EndPage()
1205 {
1206 }
1207
1208 // ---------------------------------------------------------------------------
1209 // text metrics
1210 // ---------------------------------------------------------------------------
1211
1212 wxCoord wxDC::GetCharHeight() const
1213 {
1214 wxCurrentDCSwitcher switcher(m_MGLDC);
1215 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1216 return YDEV2LOGREL(m_mglFont->fontHeight);
1217 }
1218
1219 wxCoord wxDC::GetCharWidth() const
1220 {
1221 wxCurrentDCSwitcher switcher(m_MGLDC);
1222 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1223 // VS: wxT() is intentional, charWidth() has both char and wchar_t version
1224 // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
1225 // scaled according to m_scaleY
1226 return YDEV2LOGREL(m_mglFont->fontWidth);
1227 }
1228
1229 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1230 wxCoord *descent, wxCoord *externalLeading,
1231 wxFont *theFont) const
1232 {
1233 wxFont oldFont;
1234
1235 if ( theFont != NULL )
1236 {
1237 oldFont = m_font;
1238 wxConstCast(this, wxDC)->SetFont(*theFont);
1239 }
1240
1241 wxCurrentDCSwitcher switcher(m_MGLDC);
1242 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return;
1243
1244 if ( x )
1245 // VS: YDEV is corrent, it should *not* be XDEV, because font's are
1246 // only scaled according to m_scaleY
1247 *x = YDEV2LOGREL(m_MGLDC->textWidth(string.c_str()));
1248 if ( y )
1249 *y = YDEV2LOGREL(m_MGLDC->textHeight());
1250 if ( descent )
1251 *descent = YDEV2LOGREL(m_mglFont->descent);
1252 if ( externalLeading )
1253 *externalLeading = YDEV2LOGREL(m_mglFont->leading);
1254
1255 if ( theFont != NULL )
1256 wxConstCast(this, wxDC)->SetFont(oldFont);
1257 }
1258
1259
1260
1261 // ---------------------------------------------------------------------------
1262 // mapping modes
1263 // ---------------------------------------------------------------------------
1264
1265 void wxDC::ComputeScaleAndOrigin()
1266 {
1267 double newX = m_logicalScaleX * m_userScaleX;
1268 double newY = m_logicalScaleY * m_userScaleY;
1269
1270 // make sure font will be reloaded before drawing:
1271 if ( newY != m_scaleY )
1272 m_mglFont = NULL;
1273 // make sure m_penOfs{X,Y} will be reevaluated before drawing:
1274 if ( newY != m_scaleY || newX != m_scaleX )
1275 m_penSelected = FALSE;
1276
1277 m_scaleX = newX, m_scaleY = newY;
1278 }
1279
1280 void wxDC::SetMapMode(int mode)
1281 {
1282 switch (mode)
1283 {
1284 case wxMM_TWIPS:
1285 SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
1286 break;
1287 case wxMM_POINTS:
1288 SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
1289 break;
1290 case wxMM_METRIC:
1291 SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
1292 break;
1293 case wxMM_LOMETRIC:
1294 SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
1295 break;
1296 default:
1297 case wxMM_TEXT:
1298 SetLogicalScale(1.0, 1.0);
1299 break;
1300 }
1301 m_mappingMode = mode;
1302 }
1303
1304 void wxDC::SetUserScale( double x, double y )
1305 {
1306 // allow negative ? -> no
1307 m_userScaleX = x;
1308 m_userScaleY = y;
1309 ComputeScaleAndOrigin();
1310 }
1311
1312 void wxDC::SetLogicalScale( double x, double y )
1313 {
1314 // allow negative ?
1315 m_logicalScaleX = x;
1316 m_logicalScaleY = y;
1317 ComputeScaleAndOrigin();
1318 }
1319
1320 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
1321 {
1322 m_logicalOriginX = x * m_signX; // is this still correct ?
1323 m_logicalOriginY = y * m_signY;
1324 ComputeScaleAndOrigin();
1325 }
1326
1327 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
1328 {
1329 // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
1330 m_deviceOriginX = x;
1331 m_deviceOriginY = y;
1332 ComputeScaleAndOrigin();
1333 }
1334
1335 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
1336 {
1337 // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
1338 m_signX = (xLeftRight ? 1 : -1);
1339 m_signY = (yBottomUp ? -1 : 1);
1340 ComputeScaleAndOrigin();
1341 }
1342
1343 // ---------------------------------------------------------------------------
1344 // coordinates transformations
1345 // ---------------------------------------------------------------------------
1346
1347 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1348 {
1349 return ((wxDC *)this)->XDEV2LOG(x);
1350 }
1351
1352 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1353 {
1354 return ((wxDC *)this)->YDEV2LOG(y);
1355 }
1356
1357 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1358 {
1359 return ((wxDC *)this)->XDEV2LOGREL(x);
1360 }
1361
1362 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1363 {
1364 return ((wxDC *)this)->YDEV2LOGREL(y);
1365 }
1366
1367 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1368 {
1369 return ((wxDC *)this)->XLOG2DEV(x);
1370 }
1371
1372 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1373 {
1374 return ((wxDC *)this)->YLOG2DEV(y);
1375 }
1376
1377 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1378 {
1379 return ((wxDC *)this)->XLOG2DEVREL(x);
1380 }
1381
1382 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1383 {
1384 return ((wxDC *)this)->YLOG2DEVREL(y);
1385 }
1386
1387
1388 void wxDC::DoGetSize(int *w, int *h) const
1389 {
1390 if (w) *w = m_MGLDC->sizex()+1;
1391 if (h) *h = m_MGLDC->sizey()+1;
1392 }
1393
1394 void wxDC::DoGetSizeMM(int *width, int *height) const
1395 {
1396 int w = 0;
1397 int h = 0;
1398 GetSize(&w, &h);
1399 if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
1400 if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
1401 }
1402
1403 wxSize wxDC::GetPPI() const
1404 {
1405 return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
1406 int(double(m_mm_to_pix_y) * inches2mm));
1407 }
1408
1409
1410 // ---------------------------------------------------------------------------
1411 // Blitting
1412 // ---------------------------------------------------------------------------
1413
1414 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1415 wxCoord width, wxCoord height,
1416 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1417 int rop, bool useMask,
1418 wxCoord xsrcMask, wxCoord ysrcMask)
1419 {
1420 wxCHECK_MSG( Ok(), FALSE, wxT("invalid dc") );
1421 wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
1422
1423 // transform the source DC coords to the device ones
1424 xsrc = source->LogicalToDeviceX(xsrc);
1425 ysrc = source->LogicalToDeviceY(ysrc);
1426
1427 /* FIXME_MGL: use the mask origin when drawing transparently */
1428 if (xsrcMask == -1 && ysrcMask == -1)
1429 {
1430 xsrcMask = xsrc; ysrcMask = ysrc;
1431 }
1432 else
1433 {
1434 xsrcMask = source->LogicalToDeviceX(xsrcMask);
1435 ysrcMask = source->LogicalToDeviceY(ysrcMask);
1436 }
1437
1438 CalcBoundingBox(xdest, ydest);
1439 CalcBoundingBox(xdest + width, ydest + height);
1440
1441 /* scale/translate size and position */
1442 wxCoord xx = XLOG2DEV(xdest);
1443 wxCoord yy = YLOG2DEV(ydest);
1444 wxCoord ww = XLOG2DEVREL(width);
1445 wxCoord hh = YLOG2DEVREL(height);
1446
1447 if ( source->m_isMemDC )
1448 {
1449 wxMemoryDC *memDC = (wxMemoryDC*) source;
1450 DoDrawSubBitmap(memDC->GetSelectedObject(), xsrc, ysrc, ww, hh,
1451 xdest, ydest, rop, useMask);
1452 }
1453 else
1454 {
1455 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1456 m_MGLDC->bitBlt(*source->GetMGLDC(),
1457 xsrc, ysrc, xsrc + ww, ysrc + hh,
1458 xx, yy, LogicalFunctionToMGLRop(rop));
1459 }
1460
1461 return TRUE;
1462 }
1463
1464 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
1465 {
1466 wxCHECK_RET( Ok(), wxT("invalid dc") );
1467 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1468
1469 wxCoord w = bmp.GetWidth();
1470 wxCoord h = bmp.GetHeight();
1471
1472 DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
1473 }
1474
1475 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
1476 {
1477 // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
1478 DoDrawBitmap((const wxBitmap&)icon, x, y, (bool)TRUE);
1479 }
1480
1481
1482 static inline void DoBitBlt(const wxBitmap& src, MGLDevCtx *dst,
1483 int sx, int sy, int sw, int sh,
1484 int dx, int dy, int dw, int dh,
1485 int rop, bool useStretching, bool putSection)
1486 {
1487 bitmap_t *bmp = src.GetMGLbitmap_t();
1488 if (!useStretching)
1489 {
1490 if (!putSection)
1491 dst->putBitmap(dx, dy, bmp, rop);
1492 else
1493 dst->putBitmapSection(sx, sy, sx + sw, sy + sh, dx, dy, bmp, rop);
1494 }
1495 else
1496 {
1497 if (!putSection)
1498 dst->stretchBitmap(dx, dy, dx + dw, dy + dh, bmp, rop);
1499 else
1500 dst->stretchBitmapSection(sx, sy, sx + sw, sy + sh,
1501 dx, dy, dx + dw, dy + dh, bmp, rop);
1502 }
1503 }
1504
1505 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
1506 wxCoord x, wxCoord y, wxCoord w, wxCoord h,
1507 wxCoord destx, wxCoord desty, int rop, bool useMask)
1508 {
1509 wxCHECK_RET( Ok(), wxT("invalid dc") );
1510 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1511
1512 CalcBoundingBox(x, y);
1513 CalcBoundingBox(x + w, y + h);
1514
1515 wxCoord dx = XLOG2DEV(destx);
1516 wxCoord dy = YLOG2DEV(desty);
1517 wxCoord dw = XLOG2DEVREL(w);
1518 wxCoord dh = YLOG2DEVREL(h);
1519
1520 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1521
1522 bool useStretching = ((w != dw) || (h != dh));
1523 bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
1524 MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
1525
1526 if ( bmp.GetDepth() == 1 )
1527 {
1528 // Mono bitmaps are handled in special way -- all 1s are drawn in
1529 // foreground colours, all 0s in background colour.
1530
1531 ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
1532 }
1533
1534 if ( useMask && bmp.GetMask() )
1535 {
1536 // Since MGL does not support masks directly (in MGL, mask is handled
1537 // in same way as in wxImage, i.e. there is one "key" color), we
1538 // simulate masked bitblt in 6 steps (same as in MSW):
1539 //
1540 // 1. Create a temporary bitmap and copy the destination area into it.
1541 // 2. Copy the source area into the temporary bitmap using the
1542 // specified logical function.
1543 // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
1544 // the mask bitmap with the temp bitmap with the foreground colour
1545 // set to WHITE and the bg colour set to BLACK.
1546 // 4. Set the unmasked area in the destination area to BLACK by
1547 // ANDing the mask bitmap with the destination area with the
1548 // foreground colour set to BLACK and the background colour set
1549 // to WHITE.
1550 // 5. OR the temporary bitmap with the destination area.
1551 // 6. Delete the temporary bitmap.
1552 //
1553 // This sequence of operations ensures that the source's transparent
1554 // area need not be black, and logical functions are supported.
1555
1556 wxBitmap *mask = bmp.GetMask()->GetBitmap();
1557
1558 MGLMemoryDC *temp;
1559
1560 if ( GetDepth() <= 8 )
1561 {
1562 temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
1563 wxDC tempdc;
1564 tempdc.SetMGLDC(temp, FALSE);
1565 tempdc.SetPalette(m_palette);
1566 }
1567 else
1568 {
1569 pixel_format_t pf;
1570 m_MGLDC->getPixelFormat(pf);
1571 temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
1572 }
1573
1574 wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
1575
1576 temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
1577
1578 DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
1579 useStretching, putSection);
1580
1581 mask->SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
1582 DoBitBlt(*mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
1583 useStretching, putSection);
1584 DoBitBlt(*mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
1585 useStretching, putSection);
1586
1587 m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
1588
1589 delete temp;
1590 }
1591
1592 else
1593 {
1594 DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
1595 useStretching, putSection);
1596 }
1597 }
wxWidgets (Impactor)