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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
561 // VS: MGLDC::rect() does not render rectangles that have width
562 // or height equal to 1, so we have to use MGLDC::line()
563 // instead...
564 if ( hh == 1 || ww == 1 )
565 m_MGLDC->line(xx + m_penOfsX, yy + m_penOfsY,
566 xx + ww-1 + m_penOfsX, yy + hh-1 + m_penOfsY);
567 else
568 m_MGLDC->rect(xx + m_penOfsX, yy + m_penOfsY,
569 xx + ww + m_penOfsX, yy + hh + m_penOfsY);
570 }
571
572 CalcBoundingBox(x, y);
573 CalcBoundingBox(x + width, y + height);
574 }
575
576 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
577 {
578 wxCHECK_RET( Ok(), wxT("invalid dc") );
579
580 if ( radius < 0.0 )
581 radius = -radius * ((width < height) ? width : height);
582
583 wxCoord xx = XLOG2DEV(x);
584 wxCoord yy = YLOG2DEV(y);
585 wxCoord ww = m_signX * XLOG2DEVREL(width);
586 wxCoord hh = m_signY * YLOG2DEVREL(height);
587 wxCoord rr = XLOG2DEVREL((wxCoord)radius);
588
589 // CMB: handle -ve width and/or height
590 if ( ww < 0 )
591 {
592 ww = -ww;
593 xx = xx - ww;
594 }
595 if ( hh < 0 )
596 {
597 hh = -hh;
598 yy = yy - hh;
599 }
600
601 // CMB: if radius is zero use DrawRectangle() instead to avoid
602 // X drawing errors with small radii
603 if ( rr == 0 )
604 {
605 DrawRectangle(x, y, width, height);
606 return;
607 }
608
609 // CMB: draw nothing if transformed w or h is 0
610 if ( ww == 0 || hh == 0 ) return;
611
612 // CMB: ensure dd is not larger than rectangle otherwise we
613 // get an hour glass shape
614 wxCoord dd = 2 * rr;
615 if ( dd > ww ) dd = ww;
616 if ( dd > hh ) dd = hh;
617 rr = dd / 2;
618
619 m_MGLDC->makeCurrent(); // will go away with MGL6.0
620 if ( m_brush.GetStyle() != wxTRANSPARENT )
621 {
622 if (!m_brushSelected)
623 SelectBrush();
624 m_MGLDC->fillRect(xx+rr, yy, xx+ww-rr, yy+hh);
625 m_MGLDC->fillRect(xx, yy+rr, xx+ww, yy+hh-rr);
626 m_MGLDC->fillEllipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
627 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
628 m_MGLDC->fillEllipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
629 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
630 }
631
632 if ( m_pen.GetStyle() != wxTRANSPARENT )
633 {
634 if ( !m_penSelected )
635 SelectPen();
636 xx += m_penOfsX;
637 yy += m_penOfsY;
638 m_MGLDC->line(xx+rr+1, yy, xx+ww-rr, yy);
639 m_MGLDC->ellipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
640 m_MGLDC->line(xx+ww, yy+rr+1, xx+ww, yy+hh-rr);
641 m_MGLDC->ellipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
642 m_MGLDC->line(xx+ww-rr, yy+hh, xx+rr+1, yy+hh);
643 m_MGLDC->ellipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
644 m_MGLDC->line(xx, yy+hh-rr, xx, yy+rr+1);
645 m_MGLDC->ellipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
646 }
647
648 CalcBoundingBox(x, y);
649 CalcBoundingBox(x + width, y + height);
650 }
651
652 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
653 {
654 wxCHECK_RET( Ok(), wxT("invalid dc") );
655
656 wxCoord x2 = (x+width);
657 wxCoord y2 = (y+height);
658
659 m_MGLDC->makeCurrent(); // will go away with MGL6.0
660 if ( m_brush.GetStyle() != wxTRANSPARENT )
661 {
662 if ( !m_brushSelected )
663 SelectBrush();
664 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
665 m_MGLDC->fillEllipse(rect);
666 }
667
668 if ( m_pen.GetStyle() != wxTRANSPARENT )
669 {
670 if ( !m_penSelected )
671 SelectPen();
672 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
673 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
674 m_MGLDC->ellipse(rect);
675 }
676
677 CalcBoundingBox(x, y);
678 CalcBoundingBox(x2, y2);
679 }
680
681 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
682 {
683 wxCHECK_RET( Ok(), wxT("invalid dc") );
684
685 wxCoord x2 = (x+w);
686 wxCoord y2 = (y+h);
687
688 m_MGLDC->makeCurrent(); // will go away with MGL6.0
689 if ( m_brush.GetStyle() != wxTRANSPARENT )
690 {
691 if (!m_brushSelected) SelectBrush();
692 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
693 m_MGLDC->fillEllipseArc(rect, (int)sa, (int)ea);
694 }
695
696 if ( m_pen.GetStyle() != wxTRANSPARENT )
697 {
698 if ( !m_penSelected )
699 SelectPen();
700 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
701 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
702 m_MGLDC->ellipseArc(rect, (int)sa, (int)ea);
703 }
704
705 CalcBoundingBox(x, y);
706 CalcBoundingBox(x2, y2);
707 }
708
709 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
710 {
711 m_MGLDC->makeCurrent(); // will go away with MGL6.0
712 DrawAnyText(text, x, y);
713
714 // update the bounding box
715 wxCoord w, h;
716 CalcBoundingBox(x, y);
717 GetTextExtent(text, &w, &h);
718 CalcBoundingBox(x + w, y + h);
719 }
720
721 bool wxDC::SelectMGLFont()
722 {
723 if ( m_mglFont == NULL )
724 {
725 float scale = m_scaleY;
726 bool antialiased = (GetDepth() > 8);
727
728 m_mglFont = m_font.GetMGLfont_t(scale, antialiased);
729 wxCHECK_MSG( m_mglFont, FALSE, wxT("invalid font") );
730
731 m_MGLDC->useFont(m_mglFont);
732 wxLogTrace("mgl_font", "useFont(%p)", m_mglFont);
733
734 #if !wxUSE_UNICODE
735 wxNativeEncodingInfo nativeEnc;
736 wxFontEncoding encoding = m_font.GetEncoding();
737 if ( !wxGetNativeFontEncoding(encoding, &nativeEnc) ||
738 !wxTestFontEncoding(nativeEnc) )
739 {
740 #if wxUSE_FONTMAP
741 if ( !wxTheFontMapper->GetAltForEncoding(encoding, &nativeEnc) )
742 #endif
743 {
744 nativeEnc.mglEncoding = MGL_ENCODING_ASCII;
745 }
746 }
747 m_MGLDC->setTextEncoding(nativeEnc.mglEncoding);
748 #endif
749 }
750 return TRUE;
751 }
752
753 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
754 {
755 wxCHECK_RET( Ok(), wxT("invalid dc") );
756
757 SelectMGLFont();
758
759 // Render the text:
760 wxCoord xx = XLOG2DEV(x);
761 wxCoord yy = YLOG2DEV(y);
762
763 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
764 m_MGLDC->setLineStipple(0xFFFF);
765 m_MGLDC->setPenSize(1, 1);
766 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
767
768 #if wxUSE_UNICODE
769 const wchar_t *c_text = text.c_str();
770 #else
771 const char *c_text = text.c_str();
772 #endif
773
774 #if 1
775 // FIXME_MGL - this is a temporary hack in absence of proper
776 // implementation of solid text background in MGL. Once
777 // the bug in MGL is fixed, this code should be nuked
778 // immediately. Note that the code is not 100% correct;
779 // it only works with wxCOPY logical function
780 if ( m_backgroundMode == wxSOLID )
781 {
782 int w = m_MGLDC->textWidth(c_text);
783 int h = m_MGLDC->textHeight();
784 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
785 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
786 m_MGLDC->fillRect(xx, yy, xx+w, yy+h);
787 }
788 #endif
789
790 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textForegroundColour.Red(),
791 m_textForegroundColour.Green(), m_textForegroundColour.Blue()));
792 m_MGLDC->setBackColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
793 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
794
795 m_MGLDC->drawStr(xx, yy, c_text);
796
797 // Render underline:
798 if ( m_font.GetUnderlined() )
799 {
800 int x1 = xx, y1 = yy;
801 int x2 = 0 , y2 = 0;
802 int w = m_MGLDC->textWidth(c_text);
803 m_MGLDC->underScoreLocation(x1, y1, c_text);
804 switch (m_MGLDC->getTextDirection())
805 {
806 case MGL_RIGHT_DIR: x2 = x1 + w, y2 = y1; break;
807 case MGL_LEFT_DIR: x2 = x1 - w, y2 = y1; break;
808 case MGL_UP_DIR: x2 = x1, y2 = y1 - w; break;
809 case MGL_DOWN_DIR: x2 = x1, y2 = y1 + w; break;
810 }
811 m_MGLDC->line(x1, y1, x2, y2);
812 }
813
814 m_penSelected = m_brushSelected = FALSE;
815 }
816
817 void wxDC::DoDrawRotatedText(const wxString& text,
818 wxCoord x, wxCoord y,
819 double angle)
820 {
821 m_MGLDC->makeCurrent(); // will go away with MGL6.0
822
823 if ( angle == 0 )
824 {
825 DoDrawText(text, x, y);
826 return;
827 }
828 else if ( angle == 90.0 )
829 m_MGLDC->setTextDirection(MGL_UP_DIR);
830 else if ( angle == 180.0 )
831 m_MGLDC->setTextDirection(MGL_LEFT_DIR);
832 else if ( angle == 270.0 )
833 m_MGLDC->setTextDirection(MGL_DOWN_DIR);
834 else
835 {
836 // FIXME_MGL -- implement once MGL supports it
837 wxFAIL_MSG(wxT("wxMGL only supports rotated text with angle 0,90,180 or 270"));
838 return;
839 }
840
841 DrawAnyText(text, x, y);
842
843 // Restore default:
844 m_MGLDC->setTextDirection(MGL_RIGHT_DIR);
845 }
846
847 // ---------------------------------------------------------------------------
848 // set GDI objects
849 // ---------------------------------------------------------------------------
850
851 void wxDC::SelectMGLStipplePen(int style)
852 {
853 ushort stipple;
854
855 switch (style)
856 {
857 case wxDOT: stipple = STIPPLE_wxDOT; break;
858 case wxLONG_DASH: stipple = STIPPLE_wxLONG_DASH; break;
859 case wxSHORT_DASH: stipple = STIPPLE_wxSHORT_DASH; break;
860 case wxDOT_DASH: stipple = STIPPLE_wxDOT_DASH; break;
861 default: stipple = STIPPLE_wxSOLID; break;
862 }
863
864 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
865 m_MGLDC->setLineStipple(stipple);
866 m_MGLDC->setPenSize(1, 1);
867 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
868 m_penOfsY = m_penOfsX = 0;
869 }
870
871 // Accepted valus of SelectMGLFatPen's 2nd argument
872 enum {
873 wxMGL_SELECT_FROM_PEN,
874 wxMGL_SELECT_FROM_BRUSH
875 };
876
877 void wxDC::SelectMGLFatPen(int style, int flag)
878 {
879 MGL_penStyleType penstyle;
880 const pattern_t *pattern = NULL;
881 pixpattern24_t *pixPattern = NULL;
882 int wx, wy;
883 int slot;
884
885 // Since MGL pens may be created from wxBrush or wxPen and we often
886 // switch between pens and brushes, we take advantage of MGL's ability
887 // to have multiple (pix)pattern_t's loaded. We always download pen
888 // to 0th slot and brush to 1st slot.
889 if ( flag == wxMGL_SELECT_FROM_PEN )
890 slot = 0;
891 else
892 slot = 1;
893
894 // compute pen's width:
895 if ( m_pen.GetWidth() <= 1 )
896 {
897 wx = wy = 1;
898 m_penOfsX = m_penOfsY = 0;
899 }
900 else
901 {
902 wx = (int)(0.5 + fabs((double) XLOG2DEVREL(m_pen.GetWidth())));
903 wy = (int)(0.5 + fabs((double) YLOG2DEVREL(m_pen.GetWidth())));
904 m_penOfsX = -wx/2;
905 m_penOfsY = -wy/2;
906 }
907
908 // find pen's type:
909 penstyle = MGL_BITMAP_TRANSPARENT;
910 switch (style)
911 {
912 case wxBDIAGONAL_HATCH: pattern = &PATTERN_wxBDIAGONAL_HATCH;
913 penstyle = MGL_BITMAP_TRANSPARENT;
914 break;
915 case wxCROSSDIAG_HATCH: pattern = &PATTERN_wxCROSSDIAG_HATCH;
916 penstyle = MGL_BITMAP_TRANSPARENT;
917 break;
918 case wxFDIAGONAL_HATCH: pattern = &PATTERN_wxFDIAGONAL_HATCH;
919 penstyle = MGL_BITMAP_TRANSPARENT;
920 break;
921 case wxCROSS_HATCH: pattern = &PATTERN_wxCROSS_HATCH;
922 penstyle = MGL_BITMAP_TRANSPARENT;
923 break;
924 case wxHORIZONTAL_HATCH: pattern = &PATTERN_wxHORIZONTAL_HATCH;
925 penstyle = MGL_BITMAP_TRANSPARENT;
926 break;
927 case wxVERTICAL_HATCH: pattern = &PATTERN_wxVERTICAL_HATCH;
928 penstyle = MGL_BITMAP_TRANSPARENT;
929 break;
930
931 case wxSTIPPLE:
932 if ( flag == wxMGL_SELECT_FROM_PEN )
933 pixPattern = (pixpattern24_t*) m_pen.GetPixPattern();
934 else
935 pixPattern = (pixpattern24_t*) m_brush.GetPixPattern();
936 penstyle = MGL_PIXMAP;
937 break;
938
939 case wxSTIPPLE_MASK_OPAQUE:
940 pattern = (pattern_t*) m_brush.GetMaskPattern();
941 penstyle = MGL_BITMAP_OPAQUE;
942 break;
943
944 case wxSOLID:
945 default:
946 penstyle = MGL_BITMAP_SOLID; break;
947 }
948
949 // ...and finally, pass the pen to MGL:
950
951 if ( pattern )
952 {
953 if ( !m_downloadedPatterns[slot] )
954 {
955 m_MGLDC->setPenBitmapPattern(slot, pattern);
956 m_downloadedPatterns[slot] = TRUE;
957 }
958 m_MGLDC->usePenBitmapPattern(slot);
959 }
960
961 if ( pixPattern )
962 {
963 if ( !m_downloadedPatterns[slot] )
964 {
965 pixpattern_t pix;
966 int x, y, c;
967
968 switch (GetDepth())
969 {
970 case 8:
971 for (y = 0; y < 8; y++)
972 for (x = 0; x < 8; x++)
973 pix.b8.p[x][y] = m_MGLDC->packColorFast(
974 pixPattern->p[x][y][0],
975 pixPattern->p[x][y][1],
976 pixPattern->p[x][y][2]);
977 break;
978 case 15:
979 case 16:
980 for (y = 0; y < 8; y++)
981 for (x = 0; x < 8; x++)
982 pix.b16.p[x][y] = m_MGLDC->packColorFast(
983 pixPattern->p[x][y][0],
984 pixPattern->p[x][y][1],
985 pixPattern->p[x][y][2]);
986 break;
987 case 24:
988 for (y = 0; y < 8; y++)
989 for (x = 0; x < 8; x++)
990 for (c = 0; c < 3; c++)
991 pix.b24.p[x][y][c] = pixPattern->p[x][y][c];
992 break;
993 case 32:
994 for (y = 0; y < 8; y++)
995 for (x = 0; x < 8; x++)
996 pix.b32.p[x][y] = m_MGLDC->packColorFast(
997 pixPattern->p[x][y][0],
998 pixPattern->p[x][y][1],
999 pixPattern->p[x][y][2]);
1000 break;
1001 default:
1002 wxFAIL_MSG(_T("invalid DC depth"));
1003 break;
1004 }
1005 m_MGLDC->setPenPixmapPattern(slot, &pix);
1006 m_downloadedPatterns[slot] = TRUE;
1007 }
1008 m_MGLDC->usePenPixmapPattern(slot);
1009 }
1010
1011 m_MGLDC->setLineStyle(MGL_LINE_PENSTYLE);
1012 m_MGLDC->setPenStyle(penstyle);
1013 m_MGLDC->setPenSize(wy, wx);
1014 }
1015
1016 void wxDC::SelectPen()
1017 {
1018 wxCHECK_RET( Ok(), wxT("invalid dc") );
1019
1020 wxColour& clr = m_pen.GetColour();
1021 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1022 m_MGLDC->setColorRGB(clr.Red(), clr.Green(), clr.Blue());
1023
1024 switch (m_pen.GetStyle())
1025 {
1026 case wxTRANSPARENT:
1027 break;
1028
1029 case wxDOT:
1030 case wxLONG_DASH:
1031 case wxSHORT_DASH:
1032 case wxDOT_DASH:
1033 SelectMGLStipplePen(m_pen.GetStyle());
1034 break;
1035
1036 case wxBDIAGONAL_HATCH:
1037 case wxCROSSDIAG_HATCH:
1038 case wxFDIAGONAL_HATCH:
1039 case wxCROSS_HATCH:
1040 case wxHORIZONTAL_HATCH:
1041 case wxVERTICAL_HATCH:
1042 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1043 break;
1044
1045 case wxSTIPPLE:
1046 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1047 break;
1048
1049 case wxSOLID:
1050 case wxUSER_DASH:
1051 default:
1052 if ( m_pen.GetWidth() <= 1 )
1053 SelectMGLStipplePen(wxSOLID);
1054 else
1055 SelectMGLFatPen(wxSOLID, wxMGL_SELECT_FROM_PEN);
1056 break;
1057 }
1058 m_penSelected = TRUE;
1059 m_brushSelected = FALSE;
1060 }
1061
1062 void wxDC::SelectBrush()
1063 {
1064 wxCHECK_RET( Ok(), wxT("invalid dc") );
1065
1066 wxColour fg, bg;
1067 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1068
1069 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
1070 {
1071 fg = m_textForegroundColour;
1072 bg = m_textBackgroundColour;
1073 }
1074 else
1075 {
1076 fg = m_brush.GetColour();
1077 bg = m_backgroundBrush.GetColour();
1078 }
1079
1080 m_MGLDC->setColorRGB(fg.Red(), fg.Green(), fg.Blue());
1081 m_MGLDC->setBackColor(m_MGLDC->packColorFast(bg.Red(), bg.Green(), bg.Blue()));
1082 m_penSelected = FALSE;
1083 m_brushSelected = TRUE;
1084
1085 SelectMGLFatPen(m_brush.GetStyle(), wxMGL_SELECT_FROM_BRUSH);
1086 }
1087
1088 void wxDC::SetPen(const wxPen& pen)
1089 {
1090 if ( !pen.Ok() ) return;
1091 if ( m_pen == pen ) return;
1092 m_pen = pen;
1093 m_penSelected = FALSE;
1094 m_downloadedPatterns[0] = FALSE;
1095 }
1096
1097 void wxDC::SetBrush(const wxBrush& brush)
1098 {
1099 if ( !brush.Ok() ) return;
1100 if ( m_brush == brush ) return;
1101 m_brush = brush;
1102 m_brushSelected = FALSE;
1103 m_downloadedPatterns[1] = FALSE;
1104 }
1105
1106 void wxDC::SetPalette(const wxPalette& palette)
1107 {
1108 wxCHECK_RET( Ok(), wxT("invalid dc") );
1109
1110 if ( palette == wxNullPalette )
1111 {
1112 if ( m_oldPalette.Ok() )
1113 SetPalette(m_oldPalette);
1114 return;
1115 }
1116
1117 if ( !palette.Ok() ) return;
1118 if ( m_palette == palette ) return;
1119 m_oldPalette = m_palette;
1120 m_palette = palette;
1121
1122 int cnt = m_palette.GetColoursCount();
1123 palette_t *pal = m_palette.GetMGLpalette_t();
1124 m_MGLDC->setPalette(pal, cnt, 0);
1125 m_MGLDC->realizePalette(cnt, 0, TRUE);
1126 }
1127
1128 void wxDC::SetFont(const wxFont& font)
1129 {
1130 if ( font.Ok() )
1131 {
1132 m_font = font;
1133 m_mglFont = NULL;
1134 }
1135 }
1136
1137 void wxDC::SetBackground(const wxBrush& brush)
1138 {
1139 wxCHECK_RET( Ok(), wxT("invalid dc") );
1140
1141 if (!m_backgroundBrush.Ok()) return;
1142
1143 m_backgroundBrush = brush;
1144 wxColour &clr = m_backgroundBrush.GetColour();
1145 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1146 m_MGLDC->setBackColor(
1147 m_MGLDC->packColorFast(clr.Red(), clr.Green(), clr.Blue()));
1148 }
1149
1150 void wxDC::SetBackgroundMode(int mode)
1151 {
1152 m_backgroundMode = mode;
1153 if ( mode == wxSOLID )
1154 m_MGLDC->setBackMode(MGL_OPAQUE_BACKGROUND);
1155 else
1156 m_MGLDC->setBackMode(MGL_TRANSPARENT_BACKGROUND);
1157 }
1158
1159 void wxDC::SetLogicalFunction(int function)
1160 {
1161 wxCHECK_RET( Ok(), wxT("invalid dc") );
1162
1163 m_logicalFunction = function;
1164
1165 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1166 m_MGLDC->setWriteMode(LogicalFunctionToMGLRop(m_logicalFunction));
1167 }
1168
1169 int wxDC::LogicalFunctionToMGLRop(int logFunc) const
1170 {
1171 MGL_writeModeType rop;
1172
1173 switch (logFunc)
1174 {
1175 case wxCLEAR: rop = MGL_R2_BLACK; break;
1176 case wxXOR: rop = MGL_R2_XORSRC; break;
1177 case wxINVERT: rop = MGL_R2_NOT; break;
1178 case wxOR_REVERSE: rop = MGL_R2_MERGESRCNOT; break;
1179 case wxAND_REVERSE: rop = MGL_R2_MASKSRCNOT; break;
1180 case wxCOPY: rop = MGL_R2_COPYSRC; break;
1181 case wxAND: rop = MGL_R2_MASKSRC; break;
1182 case wxAND_INVERT: rop = MGL_R2_MASKNOTSRC; break;
1183 case wxNO_OP: rop = MGL_R2_NOP; break;
1184 case wxNOR: rop = MGL_R2_NOTMERGESRC; break;
1185 case wxEQUIV: rop = MGL_R2_NOTXORSRC; break;
1186 case wxSRC_INVERT: rop = MGL_R2_NOTCOPYSRC; break;
1187 case wxOR_INVERT: rop = MGL_R2_MERGENOTSRC; break;
1188 case wxNAND: rop = MGL_R2_NOTMASKSRC; break;
1189 case wxOR: rop = MGL_R2_MERGESRC; break;
1190 case wxSET: rop = MGL_R2_WHITE; break;
1191 default:
1192 wxFAIL_MSG( wxT("unsupported logical function") );
1193 return MGL_REPLACE_MODE;
1194 }
1195 return (int)rop;
1196 }
1197
1198 bool wxDC::StartDoc(const wxString& message)
1199 {
1200 // We might be previewing, so return TRUE to let it continue.
1201 return TRUE;
1202 }
1203
1204 void wxDC::EndDoc()
1205 {
1206 }
1207
1208 void wxDC::StartPage()
1209 {
1210 }
1211
1212 void wxDC::EndPage()
1213 {
1214 }
1215
1216 // ---------------------------------------------------------------------------
1217 // text metrics
1218 // ---------------------------------------------------------------------------
1219
1220 wxCoord wxDC::GetCharHeight() const
1221 {
1222 wxCurrentDCSwitcher switcher(m_MGLDC);
1223 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1224 return YDEV2LOGREL(m_mglFont->fontHeight);
1225 }
1226
1227 wxCoord wxDC::GetCharWidth() const
1228 {
1229 wxCurrentDCSwitcher switcher(m_MGLDC);
1230 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1231 // VS: wxT() is intentional, charWidth() has both char and wchar_t version
1232 // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
1233 // scaled according to m_scaleY
1234 return YDEV2LOGREL(m_mglFont->fontWidth);
1235 }
1236
1237 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1238 wxCoord *descent, wxCoord *externalLeading,
1239 wxFont *theFont) const
1240 {
1241 wxFont oldFont;
1242
1243 if ( theFont != NULL )
1244 {
1245 oldFont = m_font;
1246 wxConstCast(this, wxDC)->SetFont(*theFont);
1247 }
1248
1249 wxCurrentDCSwitcher switcher(m_MGLDC);
1250 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return;
1251
1252 if ( x )
1253 // VS: YDEV is corrent, it should *not* be XDEV, because font's are
1254 // only scaled according to m_scaleY
1255 *x = YDEV2LOGREL(m_MGLDC->textWidth(string.c_str()));
1256 if ( y )
1257 *y = YDEV2LOGREL(m_MGLDC->textHeight());
1258 if ( descent )
1259 *descent = YDEV2LOGREL(m_mglFont->descent);
1260 if ( externalLeading )
1261 *externalLeading = YDEV2LOGREL(m_mglFont->leading);
1262
1263 if ( theFont != NULL )
1264 wxConstCast(this, wxDC)->SetFont(oldFont);
1265 }
1266
1267
1268
1269 // ---------------------------------------------------------------------------
1270 // mapping modes
1271 // ---------------------------------------------------------------------------
1272
1273 void wxDC::ComputeScaleAndOrigin()
1274 {
1275 double newX = m_logicalScaleX * m_userScaleX;
1276 double newY = m_logicalScaleY * m_userScaleY;
1277
1278 // make sure font will be reloaded before drawing:
1279 if ( newY != m_scaleY )
1280 m_mglFont = NULL;
1281 // make sure m_penOfs{X,Y} will be reevaluated before drawing:
1282 if ( newY != m_scaleY || newX != m_scaleX )
1283 m_penSelected = FALSE;
1284
1285 m_scaleX = newX, m_scaleY = newY;
1286 }
1287
1288 void wxDC::SetMapMode(int mode)
1289 {
1290 switch (mode)
1291 {
1292 case wxMM_TWIPS:
1293 SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
1294 break;
1295 case wxMM_POINTS:
1296 SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
1297 break;
1298 case wxMM_METRIC:
1299 SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
1300 break;
1301 case wxMM_LOMETRIC:
1302 SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
1303 break;
1304 default:
1305 case wxMM_TEXT:
1306 SetLogicalScale(1.0, 1.0);
1307 break;
1308 }
1309 m_mappingMode = mode;
1310 }
1311
1312 void wxDC::SetUserScale( double x, double y )
1313 {
1314 // allow negative ? -> no
1315 m_userScaleX = x;
1316 m_userScaleY = y;
1317 ComputeScaleAndOrigin();
1318 }
1319
1320 void wxDC::SetLogicalScale( double x, double y )
1321 {
1322 // allow negative ?
1323 m_logicalScaleX = x;
1324 m_logicalScaleY = y;
1325 ComputeScaleAndOrigin();
1326 }
1327
1328 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
1329 {
1330 m_logicalOriginX = x * m_signX; // is this still correct ?
1331 m_logicalOriginY = y * m_signY;
1332 ComputeScaleAndOrigin();
1333 }
1334
1335 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
1336 {
1337 // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
1338 m_deviceOriginX = x;
1339 m_deviceOriginY = y;
1340 ComputeScaleAndOrigin();
1341 }
1342
1343 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
1344 {
1345 // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
1346 m_signX = (xLeftRight ? 1 : -1);
1347 m_signY = (yBottomUp ? -1 : 1);
1348 ComputeScaleAndOrigin();
1349 }
1350
1351 // ---------------------------------------------------------------------------
1352 // coordinates transformations
1353 // ---------------------------------------------------------------------------
1354
1355 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1356 {
1357 return ((wxDC *)this)->XDEV2LOG(x);
1358 }
1359
1360 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1361 {
1362 return ((wxDC *)this)->YDEV2LOG(y);
1363 }
1364
1365 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1366 {
1367 return ((wxDC *)this)->XDEV2LOGREL(x);
1368 }
1369
1370 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1371 {
1372 return ((wxDC *)this)->YDEV2LOGREL(y);
1373 }
1374
1375 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1376 {
1377 return ((wxDC *)this)->XLOG2DEV(x);
1378 }
1379
1380 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1381 {
1382 return ((wxDC *)this)->YLOG2DEV(y);
1383 }
1384
1385 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1386 {
1387 return ((wxDC *)this)->XLOG2DEVREL(x);
1388 }
1389
1390 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1391 {
1392 return ((wxDC *)this)->YLOG2DEVREL(y);
1393 }
1394
1395
1396 void wxDC::DoGetSize(int *w, int *h) const
1397 {
1398 if (w) *w = m_MGLDC->sizex()+1;
1399 if (h) *h = m_MGLDC->sizey()+1;
1400 }
1401
1402 void wxDC::DoGetSizeMM(int *width, int *height) const
1403 {
1404 int w = 0;
1405 int h = 0;
1406 GetSize(&w, &h);
1407 if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
1408 if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
1409 }
1410
1411 wxSize wxDC::GetPPI() const
1412 {
1413 return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
1414 int(double(m_mm_to_pix_y) * inches2mm));
1415 }
1416
1417
1418 // ---------------------------------------------------------------------------
1419 // Blitting
1420 // ---------------------------------------------------------------------------
1421
1422 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1423 wxCoord width, wxCoord height,
1424 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1425 int rop, bool useMask,
1426 wxCoord xsrcMask, wxCoord ysrcMask)
1427 {
1428 wxCHECK_MSG( Ok(), FALSE, wxT("invalid dc") );
1429 wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
1430
1431 // transform the source DC coords to the device ones
1432 xsrc = source->LogicalToDeviceX(xsrc);
1433 ysrc = source->LogicalToDeviceY(ysrc);
1434
1435 /* FIXME_MGL: use the mask origin when drawing transparently */
1436 if (xsrcMask == -1 && ysrcMask == -1)
1437 {
1438 xsrcMask = xsrc; ysrcMask = ysrc;
1439 }
1440 else
1441 {
1442 xsrcMask = source->LogicalToDeviceX(xsrcMask);
1443 ysrcMask = source->LogicalToDeviceY(ysrcMask);
1444 }
1445
1446 CalcBoundingBox(xdest, ydest);
1447 CalcBoundingBox(xdest + width, ydest + height);
1448
1449 /* scale/translate size and position */
1450 wxCoord xx = XLOG2DEV(xdest);
1451 wxCoord yy = YLOG2DEV(ydest);
1452 wxCoord ww = XLOG2DEVREL(width);
1453 wxCoord hh = YLOG2DEVREL(height);
1454
1455 if ( source->m_isMemDC )
1456 {
1457 wxMemoryDC *memDC = (wxMemoryDC*) source;
1458 DoDrawSubBitmap(memDC->GetSelectedObject(), xsrc, ysrc, ww, hh,
1459 xdest, ydest, rop, useMask);
1460 }
1461 else
1462 {
1463 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1464 m_MGLDC->bitBlt(*source->GetMGLDC(),
1465 xsrc, ysrc, xsrc + ww, ysrc + hh,
1466 xx, yy, LogicalFunctionToMGLRop(rop));
1467 }
1468
1469 return TRUE;
1470 }
1471
1472 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
1473 {
1474 wxCHECK_RET( Ok(), wxT("invalid dc") );
1475 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1476
1477 wxCoord w = bmp.GetWidth();
1478 wxCoord h = bmp.GetHeight();
1479
1480 DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
1481 }
1482
1483 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
1484 {
1485 // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
1486 DoDrawBitmap((const wxBitmap&)icon, x, y, (bool)TRUE);
1487 }
1488
1489
1490 static inline void DoBitBlt(const wxBitmap& src, MGLDevCtx *dst,
1491 int sx, int sy, int sw, int sh,
1492 int dx, int dy, int dw, int dh,
1493 int rop, bool useStretching, bool putSection)
1494 {
1495 bitmap_t *bmp = src.GetMGLbitmap_t();
1496 if (!useStretching)
1497 {
1498 if (!putSection)
1499 dst->putBitmap(dx, dy, bmp, rop);
1500 else
1501 dst->putBitmapSection(sx, sy, sx + sw, sy + sh, dx, dy, bmp, rop);
1502 }
1503 else
1504 {
1505 if (!putSection)
1506 dst->stretchBitmap(dx, dy, dx + dw, dy + dh, bmp, rop);
1507 else
1508 dst->stretchBitmapSection(sx, sy, sx + sw, sy + sh,
1509 dx, dy, dx + dw, dy + dh, bmp, rop);
1510 }
1511 }
1512
1513 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
1514 wxCoord x, wxCoord y, wxCoord w, wxCoord h,
1515 wxCoord destx, wxCoord desty, int rop, bool useMask)
1516 {
1517 wxCHECK_RET( Ok(), wxT("invalid dc") );
1518 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1519
1520 CalcBoundingBox(x, y);
1521 CalcBoundingBox(x + w, y + h);
1522
1523 wxCoord dx = XLOG2DEV(destx);
1524 wxCoord dy = YLOG2DEV(desty);
1525 wxCoord dw = XLOG2DEVREL(w);
1526 wxCoord dh = YLOG2DEVREL(h);
1527
1528 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1529
1530 bool useStretching = ((w != dw) || (h != dh));
1531 bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
1532 MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
1533
1534 if ( bmp.GetDepth() == 1 )
1535 {
1536 // Mono bitmaps are handled in special way -- all 1s are drawn in
1537 // foreground colours, all 0s in background colour.
1538
1539 ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
1540 }
1541
1542 if ( useMask && bmp.GetMask() )
1543 {
1544 // Since MGL does not support masks directly (in MGL, mask is handled
1545 // in same way as in wxImage, i.e. there is one "key" color), we
1546 // simulate masked bitblt in 6 steps (same as in MSW):
1547 //
1548 // 1. Create a temporary bitmap and copy the destination area into it.
1549 // 2. Copy the source area into the temporary bitmap using the
1550 // specified logical function.
1551 // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
1552 // the mask bitmap with the temp bitmap with the foreground colour
1553 // set to WHITE and the bg colour set to BLACK.
1554 // 4. Set the unmasked area in the destination area to BLACK by
1555 // ANDing the mask bitmap with the destination area with the
1556 // foreground colour set to BLACK and the background colour set
1557 // to WHITE.
1558 // 5. OR the temporary bitmap with the destination area.
1559 // 6. Delete the temporary bitmap.
1560 //
1561 // This sequence of operations ensures that the source's transparent
1562 // area need not be black, and logical functions are supported.
1563
1564 wxBitmap *mask = bmp.GetMask()->GetBitmap();
1565
1566 MGLMemoryDC *temp;
1567
1568 if ( GetDepth() <= 8 )
1569 {
1570 temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
1571 wxDC tempdc;
1572 tempdc.SetMGLDC(temp, FALSE);
1573 tempdc.SetPalette(m_palette);
1574 }
1575 else
1576 {
1577 pixel_format_t pf;
1578 m_MGLDC->getPixelFormat(pf);
1579 temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
1580 }
1581
1582 wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
1583
1584 temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
1585
1586 DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
1587 useStretching, putSection);
1588
1589 mask->SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
1590 DoBitBlt(*mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
1591 useStretching, putSection);
1592 DoBitBlt(*mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
1593 useStretching, putSection);
1594
1595 m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
1596
1597 delete temp;
1598 }
1599
1600 else
1601 {
1602 DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
1603 useStretching, putSection);
1604 }
1605 }
wxWidgets (Impactor)