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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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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/encinfo.h"
37 #include "wx/fontmap.h"
38 #include "wx/mgl/private.h"
39 #include "wx/log.h"
40
41 #include <string.h>
42 #include <mgraph.hpp>
43
44
45
46 //-----------------------------------------------------------------------------
47 // constants
48 //-----------------------------------------------------------------------------
49
50 const double mm2inches = 0.0393700787402;
51 const double inches2mm = 25.4;
52 const double mm2twips = 56.6929133859;
53 const double twips2mm = 0.0176388888889;
54 const double mm2pt = 2.83464566929;
55 const double pt2mm = 0.352777777778;
56 const double RAD2DEG = 180.0 / M_PI;
57
58
59 //-----------------------------------------------------------------------------
60 // pens data:
61 //-----------------------------------------------------------------------------
62
63 const ushort STIPPLE_wxDOT = 0x5555/* - - - - - - - -*/;
64 const ushort STIPPLE_wxLONG_DASH = 0xF0F0/* ---- ----*/;
65 const ushort STIPPLE_wxSHORT_DASH = 0xCCCC/*-- -- -- -- */;
66 const ushort STIPPLE_wxDOT_DASH = 0x3939/* --- - --- -*/;
67 const ushort STIPPLE_wxSOLID = 0xFFFF/*----------------*/;
68
69 #define PATTERN_ROW(b7,b6,b5,b4,b3,b2,b1,b0) \
70 ((b7 << 7) | (b6 << 6) | (b5 << 5) | (b4 << 4) | \
71 (b3 << 3) | (b2 << 2) | (b1 << 1) | b0)
72
73 static pattern_t PATTERN_wxFDIAGONAL_HATCH = {{
74 PATTERN_ROW(1,0,0,0,0,0,0,0),
75 PATTERN_ROW(0,1,0,0,0,0,0,0),
76 PATTERN_ROW(0,0,1,0,0,0,0,0),
77 PATTERN_ROW(0,0,0,1,0,0,0,0),
78 PATTERN_ROW(0,0,0,0,1,0,0,0),
79 PATTERN_ROW(0,0,0,0,0,1,0,0),
80 PATTERN_ROW(0,0,0,0,0,0,1,0),
81 PATTERN_ROW(0,0,0,0,0,0,0,1),
82 }};
83
84 static pattern_t PATTERN_wxCROSSDIAG_HATCH = {{
85 PATTERN_ROW(1,0,0,0,0,0,0,1),
86 PATTERN_ROW(0,1,0,0,0,0,1,0),
87 PATTERN_ROW(0,0,1,0,0,1,0,0),
88 PATTERN_ROW(0,0,0,1,1,0,0,0),
89 PATTERN_ROW(0,0,0,1,1,0,0,0),
90 PATTERN_ROW(0,0,1,0,0,1,0,0),
91 PATTERN_ROW(0,1,0,0,0,0,1,0),
92 PATTERN_ROW(1,0,0,0,0,0,0,1),
93 }};
94
95 static pattern_t PATTERN_wxBDIAGONAL_HATCH = {{
96 PATTERN_ROW(0,0,0,0,0,0,0,1),
97 PATTERN_ROW(0,0,0,0,0,0,1,0),
98 PATTERN_ROW(0,0,0,0,0,1,0,0),
99 PATTERN_ROW(0,0,0,0,1,0,0,0),
100 PATTERN_ROW(0,0,0,1,0,0,0,0),
101 PATTERN_ROW(0,0,1,0,0,0,0,0),
102 PATTERN_ROW(0,1,0,0,0,0,0,0),
103 PATTERN_ROW(1,0,0,0,0,0,0,0),
104 }};
105
106 static pattern_t PATTERN_wxCROSS_HATCH = {{
107 PATTERN_ROW(0,0,0,1,0,0,0,0),
108 PATTERN_ROW(0,0,0,1,0,0,0,0),
109 PATTERN_ROW(0,0,0,1,0,0,0,0),
110 PATTERN_ROW(1,1,1,1,1,1,1,1),
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(0,0,0,1,0,0,0,0),
115 }};
116
117 static pattern_t PATTERN_wxHORIZONTAL_HATCH = {{
118 PATTERN_ROW(0,0,0,0,0,0,0,0),
119 PATTERN_ROW(0,0,0,0,0,0,0,0),
120 PATTERN_ROW(0,0,0,0,0,0,0,0),
121 PATTERN_ROW(1,1,1,1,1,1,1,1),
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(0,0,0,0,0,0,0,0),
126 }};
127
128 static pattern_t PATTERN_wxVERTICAL_HATCH = {{
129 PATTERN_ROW(0,0,0,1,0,0,0,0),
130 PATTERN_ROW(0,0,0,1,0,0,0,0),
131 PATTERN_ROW(0,0,0,1,0,0,0,0),
132 PATTERN_ROW(0,0,0,1,0,0,0,0),
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 }};
138
139 #undef PATTERN_ROW
140
141 //-----------------------------------------------------------------------------
142 // wxDC
143 //-----------------------------------------------------------------------------
144
145 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
146
147 // Default constructor
148 wxDC::wxDC()
149 {
150 m_isMemDC = FALSE;
151 m_MGLDC = NULL;
152 m_OwnsMGLDC = FALSE;
153 m_ok = FALSE; // must call SetMGLDevCtx() before using it
154
155 m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
156 (double)wxGetDisplaySizeMM().GetWidth();
157 m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
158 (double)wxGetDisplaySizeMM().GetHeight();
159
160 m_pen = *wxBLACK_PEN;
161 m_font = *wxNORMAL_FONT;
162 m_brush = *wxWHITE_BRUSH;
163 m_penOfsX = m_penOfsY = 0;
164
165 m_penSelected = m_brushSelected = FALSE;
166 m_downloadedPatterns[0] = m_downloadedPatterns[1] = FALSE;
167
168 m_mglFont = NULL;
169 }
170
171
172 wxDC::~wxDC()
173 {
174 if (m_OwnsMGLDC)
175 delete m_MGLDC;
176 }
177
178 void wxDC::SetMGLDC(MGLDevCtx *mgldc, bool OwnsMGLDC)
179 {
180 if ( m_OwnsMGLDC && m_MGLDC )
181 delete m_MGLDC;
182 m_MGLDC = mgldc;
183 m_OwnsMGLDC = OwnsMGLDC;
184 m_ok = TRUE;
185
186 if ( !m_globalClippingRegion.IsNull() )
187 SetClippingRegion(m_globalClippingRegion);
188
189 InitializeMGLDC();
190 }
191
192 void wxDC::InitializeMGLDC()
193 {
194 if ( GetDepth() > 8 )
195 {
196 wxCurrentDCSwitcher switcher(m_MGLDC); // will go away with MGL6
197 m_MGLDC->setFontBlendMode(MGL_AA_RGBBLEND);
198 }
199 }
200
201
202 // ---------------------------------------------------------------------------
203 // clipping
204 // ---------------------------------------------------------------------------
205
206
207 #define DO_SET_CLIPPING_BOX(rg) \
208 { \
209 wxRect rect = rg.GetBox(); \
210 m_clipX1 = (wxCoord) XDEV2LOG(rect.GetLeft()); \
211 m_clipY1 = (wxCoord) YDEV2LOG(rect.GetTop()); \
212 m_clipX2 = (wxCoord) XDEV2LOG(rect.GetRight()); \
213 m_clipY2 = (wxCoord) YDEV2LOG(rect.GetBottom()); \
214 }
215
216 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
217 {
218 wxCHECK_RET( Ok(), wxT("invalid dc") );
219
220 wxRect rect(XLOG2DEV(cx), YLOG2DEV(cy), XLOG2DEVREL(cw), YLOG2DEVREL(ch));
221
222 if ( !m_currentClippingRegion.IsNull() )
223 m_currentClippingRegion.Intersect(rect);
224 else
225 m_currentClippingRegion.Union(rect);
226
227 m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
228
229 m_clipping = TRUE;
230 DO_SET_CLIPPING_BOX(m_currentClippingRegion)
231 }
232
233 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
234 {
235 wxCHECK_RET( Ok(), wxT("invalid dc") );
236
237 if ( region.IsEmpty() )
238 {
239 DestroyClippingRegion();
240 return;
241 }
242
243 wxRegion rg(region);
244
245 // check if the DC is scaled or moved, and if yes, then
246 // convert rg to device coordinates:
247 if ( m_deviceOriginX != 0 || m_deviceOriginY != 0 ||
248 m_logicalOriginX != 0 || m_logicalOriginY != 0 ||
249 XLOG2DEVREL(500) != 500 || YLOG2DEVREL(500) != 500 )
250 {
251 region_t *mrg = rg.GetMGLRegion().rgnPointer();
252 span_t *s;
253 segment_t *p;
254 for (s = mrg->spans; s; s = s->next)
255 {
256 s->y = YLOG2DEV(s->y);
257 for (p = s->seg; p; p = p->next)
258 p->x = XLOG2DEV(p->x);
259 }
260 }
261
262 if ( !m_currentClippingRegion.IsNull() )
263 m_currentClippingRegion.Intersect(rg);
264 else
265 m_currentClippingRegion.Union(rg);
266
267 m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
268
269 m_clipping = TRUE;
270 DO_SET_CLIPPING_BOX(m_currentClippingRegion)
271 }
272
273 void wxDC::DestroyClippingRegion()
274 {
275 wxCHECK_RET( Ok(), wxT("invalid dc") );
276
277 if ( !m_globalClippingRegion.IsNull() )
278 {
279 m_MGLDC->setClipRegion(m_globalClippingRegion.GetMGLRegion());
280 m_currentClippingRegion = m_globalClippingRegion;
281 m_clipping = TRUE;
282 }
283 else
284 {
285 m_MGLDC->setClipRect(MGLRect(0, 0, m_MGLDC->sizex()+1, m_MGLDC->sizey()+1));
286 ResetClipping();
287 m_currentClippingRegion.Clear();
288 }
289 }
290
291 // ---------------------------------------------------------------------------
292 // query capabilities
293 // ---------------------------------------------------------------------------
294
295 bool wxDC::CanDrawBitmap() const
296 {
297 return TRUE;
298 }
299
300 bool wxDC::CanGetTextExtent() const
301 {
302 return TRUE;
303 }
304
305 int wxDC::GetDepth() const
306 {
307 return m_MGLDC->getBitsPerPixel();
308 }
309
310 // ---------------------------------------------------------------------------
311 // drawing
312 // ---------------------------------------------------------------------------
313
314 void wxDC::Clear()
315 {
316 wxCHECK_RET( Ok(), wxT("invalid dc") );
317
318 m_MGLDC->makeCurrent(); // will go away with MGL6.0
319 if ( m_backgroundBrush.GetStyle() != wxTRANSPARENT )
320 {
321 int w, h;
322 wxBrush oldb = m_brush;
323 SetBrush(m_backgroundBrush);
324 SelectBrush();
325 GetSize(&w, &h);
326 m_MGLDC->fillRect(0, 0, w, h);
327 SetBrush(oldb);
328 }
329 }
330
331 extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
332 const wxColour & col, int style);
333
334 bool wxDC::DoFloodFill(wxCoord x, wxCoord y,
335 const wxColour& col, int style)
336 {
337 return wxDoFloodFill(this, x, y, col, style);
338 }
339
340 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
341 {
342 wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel"));
343
344 uchar r, g, b;
345 m_MGLDC->unpackColorFast(m_MGLDC->getPixel(XLOG2DEV(x), YLOG2DEV(y)),
346 r, g, b);
347 col->Set(r, g, b);
348 return TRUE;
349 }
350
351 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
352 {
353 wxCHECK_RET( Ok(), wxT("invalid dc") );
354
355 if ( m_pen.GetStyle() != wxTRANSPARENT )
356 {
357 int w = 0;
358 int h = 0;
359 GetSize(&w, &h);
360 m_MGLDC->makeCurrent(); // will go away with MGL6.0
361 if ( !m_penSelected )
362 SelectPen();
363 wxCoord xx = XLOG2DEV(x);
364 wxCoord yy = YLOG2DEV(y);
365 m_MGLDC->line(m_penOfsX, yy + m_penOfsY, w-1 + m_penOfsX, yy + m_penOfsY);
366 m_MGLDC->line(xx + m_penOfsX, m_penOfsY, x + m_penOfsX, h-1 + m_penOfsY);
367 CalcBoundingBox(0, 0);
368 CalcBoundingBox(w, h);
369 }
370 }
371
372 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
373 {
374 wxCHECK_RET( Ok(), wxT("invalid dc") );
375
376 if ( m_pen.GetStyle() != wxTRANSPARENT )
377 {
378 m_MGLDC->makeCurrent(); // will go away with MGL6.0
379 if ( !m_penSelected )
380 SelectPen();
381 m_MGLDC->lineExt(XLOG2DEV(x1) + m_penOfsX, YLOG2DEV(y1) + m_penOfsY,
382 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY,FALSE);
383 CalcBoundingBox(x1, y1);
384 CalcBoundingBox(x2, y2);
385 }
386 }
387
388 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
389 // and ending at (x2, y2)
390 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
391 wxCoord x2, wxCoord y2,
392 wxCoord xc, wxCoord yc)
393 {
394 wxCHECK_RET( Ok(), wxT("invalid dc") );
395
396 wxCoord xx1 = XLOG2DEV(x1);
397 wxCoord yy1 = YLOG2DEV(y1);
398 wxCoord xx2 = XLOG2DEV(x2);
399 wxCoord yy2 = YLOG2DEV(y2);
400 wxCoord xxc = XLOG2DEV(xc);
401 wxCoord yyc = YLOG2DEV(yc);
402 double dx = xx1 - xxc;
403 double dy = yy1 - yyc;
404 double radius = sqrt((double)(dx*dx+dy*dy));
405 wxCoord r = (wxCoord)radius;
406 double radius1, radius2;
407
408
409 if (xx1 == xx2 && yy1 == yy2)
410 {
411 radius1 = 0.0;
412 radius2 = 360.0;
413 }
414 else if (radius == 0.0)
415 {
416 radius1 = radius2 = 0.0;
417 }
418 else
419 {
420 radius1 = (xx1 - xxc == 0) ?
421 (yy1 - yyc < 0) ? 90.0 : -90.0 :
422 -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
423 radius2 = (xx2 - xxc == 0) ?
424 (yy2 - yyc < 0) ? 90.0 : -90.0 :
425 -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
426 }
427 wxCoord alpha1 = wxCoord(radius1);
428 wxCoord alpha2 = alpha1 + wxCoord(radius2 - radius1);
429 while (alpha2 <= 0) alpha2 += 360;
430 while (alpha1 > 360) alpha1 -= 360;
431
432 m_MGLDC->makeCurrent(); // will go away with MGL6.0
433 if ( m_brush.GetStyle() != wxTRANSPARENT )
434 {
435 if ( !m_brushSelected )
436 SelectBrush();
437 m_MGLDC->fillEllipseArc(xxc, yyc, r, r, alpha1, alpha2);
438 }
439
440 if ( m_pen.GetStyle() != wxTRANSPARENT )
441 {
442 if ( !m_penSelected )
443 SelectPen();
444 m_MGLDC->ellipseArc(xxc + m_penOfsX, yyc + m_penOfsY, r, r, alpha1, alpha2);
445 }
446
447 CalcBoundingBox(xc - r, yc - r);
448 CalcBoundingBox(xc + r, yc + r);
449 }
450
451 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
452 {
453 wxCHECK_RET( Ok(), wxT("invalid dc") );
454
455 if ( m_pen.GetStyle() != wxTRANSPARENT )
456 {
457 m_MGLDC->makeCurrent(); // will go away with MGL6.0
458 if ( !m_penSelected )
459 SelectPen();
460 m_MGLDC->pixel(XLOG2DEV(x), YLOG2DEV(y));
461 CalcBoundingBox(x, y);
462 }
463 }
464
465 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
466 {
467 wxCHECK_RET( Ok(), wxT("invalid dc") );
468
469 wxCoord xxoffset = XLOG2DEVREL(xoffset),
470 yyoffset = YLOG2DEVREL(yoffset);
471 MGLPoint *cpoints = new MGLPoint[n+1];
472 for (int i = 0; i < n; i++)
473 {
474 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
475 cpoints[i].x = (int)(XLOG2DEV(points[i].x));
476 cpoints[i].y = (int)(YLOG2DEV(points[i].y));
477 }
478 cpoints[n] = cpoints[0];
479
480 m_MGLDC->makeCurrent(); // will go away with MGL6.0
481 if ( m_brush.GetStyle() != wxTRANSPARENT )
482 {
483 if ( !m_brushSelected )
484 SelectBrush();
485 m_MGLDC->fillPolygon(n, cpoints, xxoffset, yyoffset);
486 }
487
488 if ( m_pen.GetStyle() != wxTRANSPARENT )
489 {
490 if ( !m_penSelected )
491 SelectPen();
492 if (m_penOfsX != 0 || m_penOfsY != 0)
493 {
494 for (int i = 0; i <= n; i++)
495 {
496 cpoints[i].x += m_penOfsX;
497 cpoints[i].y += m_penOfsY;
498 }
499 }
500 m_MGLDC->polyLine(n+1, cpoints);
501 }
502
503 delete[] cpoints;
504 }
505
506 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
507 {
508 wxCHECK_RET( Ok(), wxT("invalid dc") );
509
510 if ( m_pen.GetStyle() != wxTRANSPARENT )
511 {
512 MGLPoint *cpoints = new MGLPoint[n];
513 m_MGLDC->makeCurrent(); // will go away with MGL6.0
514 if ( !m_penSelected )
515 SelectPen();
516 for (int i = 0; i < n; i++)
517 {
518 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
519 cpoints[i].x = (int)(XLOG2DEV(points[i].x + xoffset) /*+ m_penOfsX*/);
520 cpoints[i].y = (int)(YLOG2DEV(points[i].y + yoffset) /*+ m_penOfsY*/);
521 }
522 m_MGLDC->polyLine(n, cpoints);
523 delete[] cpoints;
524 }
525 }
526
527 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
528 {
529 wxCHECK_RET( Ok(), wxT("invalid dc") );
530
531 wxCoord xx = XLOG2DEV(x);
532 wxCoord yy = YLOG2DEV(y);
533 wxCoord ww = m_signX * XLOG2DEVREL(width);
534 wxCoord hh = m_signY * YLOG2DEVREL(height);
535
536 if ( ww == 0 || hh == 0 ) return;
537
538 if ( ww < 0 )
539 {
540 ww = -ww;
541 xx = xx - ww;
542 }
543 if ( hh < 0 )
544 {
545 hh = -hh;
546 yy = yy - hh;
547 }
548
549 m_MGLDC->makeCurrent(); // will go away with MGL6.0
550 if ( m_brush.GetStyle() != wxTRANSPARENT )
551 {
552 if ( !m_brushSelected )
553 SelectBrush();
554 m_MGLDC->fillRect(xx, yy, xx + ww, yy + hh);
555 }
556
557 if ( m_pen.GetStyle() != wxTRANSPARENT )
558 {
559 if ( !m_penSelected )
560 SelectPen();
561
562 m_MGLDC->rect(xx + m_penOfsX, yy + m_penOfsY,
563 xx + ww + m_penOfsX, yy + hh + m_penOfsY);
564 }
565
566 CalcBoundingBox(x, y);
567 CalcBoundingBox(x + width, y + height);
568 }
569
570 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
571 {
572 wxCHECK_RET( Ok(), wxT("invalid dc") );
573
574 if ( radius < 0.0 )
575 radius = -radius * ((width < height) ? width : height);
576
577 wxCoord xx = XLOG2DEV(x);
578 wxCoord yy = YLOG2DEV(y);
579 wxCoord ww = m_signX * XLOG2DEVREL(width);
580 wxCoord hh = m_signY * YLOG2DEVREL(height);
581 wxCoord rr = XLOG2DEVREL((wxCoord)radius);
582
583 // CMB: handle -ve width and/or height
584 if ( ww < 0 )
585 {
586 ww = -ww;
587 xx = xx - ww;
588 }
589 if ( hh < 0 )
590 {
591 hh = -hh;
592 yy = yy - hh;
593 }
594
595 // CMB: if radius is zero use DrawRectangle() instead to avoid
596 // X drawing errors with small radii
597 if ( rr == 0 )
598 {
599 DrawRectangle(x, y, width, height);
600 return;
601 }
602
603 // CMB: draw nothing if transformed w or h is 0
604 if ( ww == 0 || hh == 0 ) return;
605
606 // CMB: ensure dd is not larger than rectangle otherwise we
607 // get an hour glass shape
608 wxCoord dd = 2 * rr;
609 if ( dd > ww ) dd = ww;
610 if ( dd > hh ) dd = hh;
611 rr = dd / 2;
612
613 m_MGLDC->makeCurrent(); // will go away with MGL6.0
614 if ( m_brush.GetStyle() != wxTRANSPARENT )
615 {
616 if (!m_brushSelected)
617 SelectBrush();
618 m_MGLDC->fillRect(xx+rr, yy, xx+ww-rr, yy+hh);
619 m_MGLDC->fillRect(xx, yy+rr, xx+ww, yy+hh-rr);
620 m_MGLDC->fillEllipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
621 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
622 m_MGLDC->fillEllipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
623 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
624 }
625
626 if ( m_pen.GetStyle() != wxTRANSPARENT )
627 {
628 if ( !m_penSelected )
629 SelectPen();
630 xx += m_penOfsX;
631 yy += m_penOfsY;
632 m_MGLDC->line(xx+rr+1, yy, xx+ww-rr, yy);
633 m_MGLDC->ellipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
634 m_MGLDC->line(xx+ww, yy+rr+1, xx+ww, yy+hh-rr);
635 m_MGLDC->ellipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
636 m_MGLDC->line(xx+ww-rr, yy+hh, xx+rr+1, yy+hh);
637 m_MGLDC->ellipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
638 m_MGLDC->line(xx, yy+hh-rr, xx, yy+rr+1);
639 m_MGLDC->ellipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
640 }
641
642 CalcBoundingBox(x, y);
643 CalcBoundingBox(x + width, y + height);
644 }
645
646 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
647 {
648 wxCHECK_RET( Ok(), wxT("invalid dc") );
649
650 wxCoord x2 = (x+width);
651 wxCoord y2 = (y+height);
652
653 m_MGLDC->makeCurrent(); // will go away with MGL6.0
654 if ( m_brush.GetStyle() != wxTRANSPARENT )
655 {
656 if ( !m_brushSelected )
657 SelectBrush();
658 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
659 m_MGLDC->fillEllipse(rect);
660 }
661
662 if ( m_pen.GetStyle() != wxTRANSPARENT )
663 {
664 if ( !m_penSelected )
665 SelectPen();
666 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
667 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
668 m_MGLDC->ellipse(rect);
669 }
670
671 CalcBoundingBox(x, y);
672 CalcBoundingBox(x2, y2);
673 }
674
675 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
676 {
677 wxCHECK_RET( Ok(), wxT("invalid dc") );
678
679 wxCoord x2 = (x+w);
680 wxCoord y2 = (y+h);
681
682 m_MGLDC->makeCurrent(); // will go away with MGL6.0
683 if ( m_brush.GetStyle() != wxTRANSPARENT )
684 {
685 if (!m_brushSelected) SelectBrush();
686 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
687 m_MGLDC->fillEllipseArc(rect, (int)sa, (int)ea);
688 }
689
690 if ( m_pen.GetStyle() != wxTRANSPARENT )
691 {
692 if ( !m_penSelected )
693 SelectPen();
694 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
695 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
696 m_MGLDC->ellipseArc(rect, (int)sa, (int)ea);
697 }
698
699 CalcBoundingBox(x, y);
700 CalcBoundingBox(x2, y2);
701 }
702
703 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
704 {
705 m_MGLDC->makeCurrent(); // will go away with MGL6.0
706 DrawAnyText(text, x, y);
707
708 // update the bounding box
709 wxCoord w, h;
710 CalcBoundingBox(x, y);
711 GetTextExtent(text, &w, &h);
712 CalcBoundingBox(x + w, y + h);
713 }
714
715 bool wxDC::SelectMGLFont()
716 {
717 if ( m_mglFont == NULL )
718 {
719 float scale = m_scaleY;
720 bool antialiased = (GetDepth() > 8);
721
722 m_mglFont = m_font.GetMGLfont_t(scale, antialiased);
723 wxCHECK_MSG( m_mglFont, FALSE, wxT("invalid font") );
724
725 m_MGLDC->useFont(m_mglFont);
726 wxLogTrace("mgl_font", "useFont(%p)", m_mglFont);
727
728 #if !wxUSE_UNICODE
729 wxNativeEncodingInfo nativeEnc;
730 wxFontEncoding encoding = m_font.GetEncoding();
731 if ( !wxGetNativeFontEncoding(encoding, &nativeEnc) ||
732 !wxTestFontEncoding(nativeEnc) )
733 {
734 #if wxUSE_FONTMAP
735 if ( !wxFontMapper::Get()->GetAltForEncoding(encoding, &nativeEnc) )
736 #endif
737 {
738 nativeEnc.mglEncoding = MGL_ENCODING_ASCII;
739 }
740 }
741 m_MGLDC->setTextEncoding(nativeEnc.mglEncoding);
742 #endif
743 }
744 return TRUE;
745 }
746
747 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
748 {
749 wxCHECK_RET( Ok(), wxT("invalid dc") );
750
751 SelectMGLFont();
752
753 // Render the text:
754 wxCoord xx = XLOG2DEV(x);
755 wxCoord yy = YLOG2DEV(y);
756
757 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
758 m_MGLDC->setLineStipple(0xFFFF);
759 m_MGLDC->setPenSize(1, 1);
760 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
761
762 #if wxUSE_UNICODE
763 const wchar_t *c_text = text.c_str();
764 #else
765 const char *c_text = text.c_str();
766 #endif
767
768 #if 1
769 // FIXME_MGL - this is a temporary hack in absence of proper
770 // implementation of solid text background in MGL. Once
771 // the bug in MGL is fixed, this code should be nuked
772 // immediately. Note that the code is not 100% correct;
773 // it only works with wxCOPY logical function
774 if ( m_backgroundMode == wxSOLID )
775 {
776 int w = m_MGLDC->textWidth(c_text);
777 int h = m_MGLDC->textHeight();
778 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
779 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
780 m_MGLDC->fillRect(xx, yy, xx+w, yy+h);
781 }
782 #endif
783
784 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textForegroundColour.Red(),
785 m_textForegroundColour.Green(), m_textForegroundColour.Blue()));
786 m_MGLDC->setBackColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
787 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
788
789 m_MGLDC->drawStr(xx, yy, c_text);
790
791 // Render underline:
792 if ( m_font.GetUnderlined() )
793 {
794 int x1 = xx, y1 = yy;
795 int x2 = 0 , y2 = 0;
796 int w = m_MGLDC->textWidth(c_text);
797 m_MGLDC->underScoreLocation(x1, y1, c_text);
798 switch (m_MGLDC->getTextDirection())
799 {
800 case MGL_RIGHT_DIR: x2 = x1 + w, y2 = y1; break;
801 case MGL_LEFT_DIR: x2 = x1 - w, y2 = y1; break;
802 case MGL_UP_DIR: x2 = x1, y2 = y1 - w; break;
803 case MGL_DOWN_DIR: x2 = x1, y2 = y1 + w; break;
804 }
805 m_MGLDC->line(x1, y1, x2, y2);
806 }
807
808 m_penSelected = m_brushSelected = FALSE;
809 }
810
811 void wxDC::DoDrawRotatedText(const wxString& text,
812 wxCoord x, wxCoord y,
813 double angle)
814 {
815 m_MGLDC->makeCurrent(); // will go away with MGL6.0
816
817 if ( angle == 0 )
818 {
819 DoDrawText(text, x, y);
820 return;
821 }
822 else if ( angle == 90.0 )
823 m_MGLDC->setTextDirection(MGL_UP_DIR);
824 else if ( angle == 180.0 )
825 m_MGLDC->setTextDirection(MGL_LEFT_DIR);
826 else if ( angle == 270.0 )
827 m_MGLDC->setTextDirection(MGL_DOWN_DIR);
828 else
829 {
830 // FIXME_MGL -- implement once MGL supports it
831 wxFAIL_MSG(wxT("wxMGL only supports rotated text with angle 0,90,180 or 270"));
832 return;
833 }
834
835 DrawAnyText(text, x, y);
836
837 // Restore default:
838 m_MGLDC->setTextDirection(MGL_RIGHT_DIR);
839 }
840
841 // ---------------------------------------------------------------------------
842 // set GDI objects
843 // ---------------------------------------------------------------------------
844
845 void wxDC::SelectMGLStipplePen(int style)
846 {
847 ushort stipple;
848
849 switch (style)
850 {
851 case wxDOT: stipple = STIPPLE_wxDOT; break;
852 case wxLONG_DASH: stipple = STIPPLE_wxLONG_DASH; break;
853 case wxSHORT_DASH: stipple = STIPPLE_wxSHORT_DASH; break;
854 case wxDOT_DASH: stipple = STIPPLE_wxDOT_DASH; break;
855 default: stipple = STIPPLE_wxSOLID; break;
856 }
857
858 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
859 m_MGLDC->setLineStipple(stipple);
860 m_MGLDC->setPenSize(1, 1);
861 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
862 m_penOfsY = m_penOfsX = 0;
863 }
864
865 // Accepted valus of SelectMGLFatPen's 2nd argument
866 enum {
867 wxMGL_SELECT_FROM_PEN,
868 wxMGL_SELECT_FROM_BRUSH
869 };
870
871 void wxDC::SelectMGLFatPen(int style, int flag)
872 {
873 MGL_penStyleType penstyle;
874 const pattern_t *pattern = NULL;
875 pixpattern24_t *pixPattern = NULL;
876 int wx, wy;
877 int slot;
878
879 // Since MGL pens may be created from wxBrush or wxPen and we often
880 // switch between pens and brushes, we take advantage of MGL's ability
881 // to have multiple (pix)pattern_t's loaded. We always download pen
882 // to 0th slot and brush to 1st slot.
883 if ( flag == wxMGL_SELECT_FROM_PEN )
884 slot = 0;
885 else
886 slot = 1;
887
888 // compute pen's width:
889 if ( m_pen.GetWidth() <= 1 )
890 {
891 wx = wy = 1;
892 m_penOfsX = m_penOfsY = 0;
893 }
894 else
895 {
896 wx = (int)(0.5 + fabs((double) XLOG2DEVREL(m_pen.GetWidth())));
897 wy = (int)(0.5 + fabs((double) YLOG2DEVREL(m_pen.GetWidth())));
898 m_penOfsX = -wx/2;
899 m_penOfsY = -wy/2;
900 }
901
902 // find pen's type:
903 penstyle = MGL_BITMAP_TRANSPARENT;
904 switch (style)
905 {
906 case wxBDIAGONAL_HATCH: pattern = &PATTERN_wxBDIAGONAL_HATCH;
907 penstyle = MGL_BITMAP_TRANSPARENT;
908 break;
909 case wxCROSSDIAG_HATCH: pattern = &PATTERN_wxCROSSDIAG_HATCH;
910 penstyle = MGL_BITMAP_TRANSPARENT;
911 break;
912 case wxFDIAGONAL_HATCH: pattern = &PATTERN_wxFDIAGONAL_HATCH;
913 penstyle = MGL_BITMAP_TRANSPARENT;
914 break;
915 case wxCROSS_HATCH: pattern = &PATTERN_wxCROSS_HATCH;
916 penstyle = MGL_BITMAP_TRANSPARENT;
917 break;
918 case wxHORIZONTAL_HATCH: pattern = &PATTERN_wxHORIZONTAL_HATCH;
919 penstyle = MGL_BITMAP_TRANSPARENT;
920 break;
921 case wxVERTICAL_HATCH: pattern = &PATTERN_wxVERTICAL_HATCH;
922 penstyle = MGL_BITMAP_TRANSPARENT;
923 break;
924
925 case wxSTIPPLE:
926 if ( flag == wxMGL_SELECT_FROM_PEN )
927 pixPattern = (pixpattern24_t*) m_pen.GetPixPattern();
928 else
929 pixPattern = (pixpattern24_t*) m_brush.GetPixPattern();
930 penstyle = MGL_PIXMAP;
931 break;
932
933 case wxSTIPPLE_MASK_OPAQUE:
934 pattern = (pattern_t*) m_brush.GetMaskPattern();
935 penstyle = MGL_BITMAP_OPAQUE;
936 break;
937
938 case wxSOLID:
939 default:
940 penstyle = MGL_BITMAP_SOLID; break;
941 }
942
943 // ...and finally, pass the pen to MGL:
944
945 if ( pattern )
946 {
947 if ( !m_downloadedPatterns[slot] )
948 {
949 m_MGLDC->setPenBitmapPattern(slot, pattern);
950 m_downloadedPatterns[slot] = TRUE;
951 }
952 m_MGLDC->usePenBitmapPattern(slot);
953 }
954
955 if ( pixPattern )
956 {
957 if ( !m_downloadedPatterns[slot] )
958 {
959 pixpattern_t pix;
960 int x, y, c;
961
962 switch (GetDepth())
963 {
964 case 8:
965 for (y = 0; y < 8; y++)
966 for (x = 0; x < 8; x++)
967 pix.b8.p[x][y] = m_MGLDC->packColorFast(
968 pixPattern->p[x][y][0],
969 pixPattern->p[x][y][1],
970 pixPattern->p[x][y][2]);
971 break;
972 case 15:
973 case 16:
974 for (y = 0; y < 8; y++)
975 for (x = 0; x < 8; x++)
976 pix.b16.p[x][y] = m_MGLDC->packColorFast(
977 pixPattern->p[x][y][0],
978 pixPattern->p[x][y][1],
979 pixPattern->p[x][y][2]);
980 break;
981 case 24:
982 for (y = 0; y < 8; y++)
983 for (x = 0; x < 8; x++)
984 for (c = 0; c < 3; c++)
985 pix.b24.p[x][y][c] = pixPattern->p[x][y][c];
986 break;
987 case 32:
988 for (y = 0; y < 8; y++)
989 for (x = 0; x < 8; x++)
990 pix.b32.p[x][y] = m_MGLDC->packColorFast(
991 pixPattern->p[x][y][0],
992 pixPattern->p[x][y][1],
993 pixPattern->p[x][y][2]);
994 break;
995 default:
996 wxFAIL_MSG(_T("invalid DC depth"));
997 break;
998 }
999 m_MGLDC->setPenPixmapPattern(slot, &pix);
1000 m_downloadedPatterns[slot] = TRUE;
1001 }
1002 m_MGLDC->usePenPixmapPattern(slot);
1003 }
1004
1005 m_MGLDC->setLineStyle(MGL_LINE_PENSTYLE);
1006 m_MGLDC->setPenStyle(penstyle);
1007 m_MGLDC->setPenSize(wy, wx);
1008 }
1009
1010 void wxDC::SelectPen()
1011 {
1012 wxCHECK_RET( Ok(), wxT("invalid dc") );
1013
1014 wxColour& clr = m_pen.GetColour();
1015 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1016 m_MGLDC->setColorRGB(clr.Red(), clr.Green(), clr.Blue());
1017
1018 switch (m_pen.GetStyle())
1019 {
1020 case wxTRANSPARENT:
1021 break;
1022
1023 case wxDOT:
1024 case wxLONG_DASH:
1025 case wxSHORT_DASH:
1026 case wxDOT_DASH:
1027 SelectMGLStipplePen(m_pen.GetStyle());
1028 break;
1029
1030 case wxBDIAGONAL_HATCH:
1031 case wxCROSSDIAG_HATCH:
1032 case wxFDIAGONAL_HATCH:
1033 case wxCROSS_HATCH:
1034 case wxHORIZONTAL_HATCH:
1035 case wxVERTICAL_HATCH:
1036 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1037 break;
1038
1039 case wxSTIPPLE:
1040 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1041 break;
1042
1043 case wxSOLID:
1044 case wxUSER_DASH:
1045 default:
1046 if ( m_pen.GetWidth() <= 1 )
1047 SelectMGLStipplePen(wxSOLID);
1048 else
1049 SelectMGLFatPen(wxSOLID, wxMGL_SELECT_FROM_PEN);
1050 break;
1051 }
1052 m_penSelected = TRUE;
1053 m_brushSelected = FALSE;
1054 }
1055
1056 void wxDC::SelectBrush()
1057 {
1058 wxCHECK_RET( Ok(), wxT("invalid dc") );
1059
1060 wxColour fg, bg;
1061 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1062
1063 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
1064 {
1065 fg = m_textForegroundColour;
1066 bg = m_textBackgroundColour;
1067 }
1068 else
1069 {
1070 fg = m_brush.GetColour();
1071 bg = m_backgroundBrush.GetColour();
1072 }
1073
1074 m_MGLDC->setColorRGB(fg.Red(), fg.Green(), fg.Blue());
1075 m_MGLDC->setBackColor(m_MGLDC->packColorFast(bg.Red(), bg.Green(), bg.Blue()));
1076 m_penSelected = FALSE;
1077 m_brushSelected = TRUE;
1078
1079 SelectMGLFatPen(m_brush.GetStyle(), wxMGL_SELECT_FROM_BRUSH);
1080 }
1081
1082 void wxDC::SetPen(const wxPen& pen)
1083 {
1084 if ( !pen.Ok() ) return;
1085 if ( m_pen == pen ) return;
1086 m_pen = pen;
1087 m_penSelected = FALSE;
1088 m_downloadedPatterns[0] = FALSE;
1089 }
1090
1091 void wxDC::SetBrush(const wxBrush& brush)
1092 {
1093 if ( !brush.Ok() ) return;
1094 if ( m_brush == brush ) return;
1095 m_brush = brush;
1096 m_brushSelected = FALSE;
1097 m_downloadedPatterns[1] = FALSE;
1098 }
1099
1100 void wxDC::SetPalette(const wxPalette& palette)
1101 {
1102 wxCHECK_RET( Ok(), wxT("invalid dc") );
1103
1104 if ( palette == wxNullPalette )
1105 {
1106 if ( m_oldPalette.Ok() )
1107 SetPalette(m_oldPalette);
1108 return;
1109 }
1110
1111 if ( !palette.Ok() ) return;
1112 if ( m_palette == palette ) return;
1113 m_oldPalette = m_palette;
1114 m_palette = palette;
1115
1116 int cnt = m_palette.GetColoursCount();
1117 palette_t *pal = m_palette.GetMGLpalette_t();
1118 m_MGLDC->setPalette(pal, cnt, 0);
1119 m_MGLDC->realizePalette(cnt, 0, TRUE);
1120 }
1121
1122 void wxDC::SetFont(const wxFont& font)
1123 {
1124 if ( font.Ok() )
1125 {
1126 m_font = font;
1127 m_mglFont = NULL;
1128 }
1129 }
1130
1131 void wxDC::SetBackground(const wxBrush& brush)
1132 {
1133 wxCHECK_RET( Ok(), wxT("invalid dc") );
1134
1135 if (!m_backgroundBrush.Ok()) return;
1136
1137 m_backgroundBrush = brush;
1138 wxColour &clr = m_backgroundBrush.GetColour();
1139 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1140 m_MGLDC->setBackColor(
1141 m_MGLDC->packColorFast(clr.Red(), clr.Green(), clr.Blue()));
1142 }
1143
1144 void wxDC::SetBackgroundMode(int mode)
1145 {
1146 m_backgroundMode = mode;
1147 if ( mode == wxSOLID )
1148 m_MGLDC->setBackMode(MGL_OPAQUE_BACKGROUND);
1149 else
1150 m_MGLDC->setBackMode(MGL_TRANSPARENT_BACKGROUND);
1151 }
1152
1153 void wxDC::SetLogicalFunction(int function)
1154 {
1155 wxCHECK_RET( Ok(), wxT("invalid dc") );
1156
1157 m_logicalFunction = function;
1158
1159 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1160 m_MGLDC->setWriteMode(LogicalFunctionToMGLRop(m_logicalFunction));
1161 }
1162
1163 int wxDC::LogicalFunctionToMGLRop(int logFunc) const
1164 {
1165 MGL_writeModeType rop;
1166
1167 switch (logFunc)
1168 {
1169 case wxCLEAR: rop = MGL_R2_BLACK; break;
1170 case wxXOR: rop = MGL_R2_XORSRC; break;
1171 case wxINVERT: rop = MGL_R2_NOT; break;
1172 case wxOR_REVERSE: rop = MGL_R2_MERGESRCNOT; break;
1173 case wxAND_REVERSE: rop = MGL_R2_MASKSRCNOT; break;
1174 case wxCOPY: rop = MGL_R2_COPYSRC; break;
1175 case wxAND: rop = MGL_R2_MASKSRC; break;
1176 case wxAND_INVERT: rop = MGL_R2_MASKNOTSRC; break;
1177 case wxNO_OP: rop = MGL_R2_NOP; break;
1178 case wxNOR: rop = MGL_R2_NOTMERGESRC; break;
1179 case wxEQUIV: rop = MGL_R2_NOTXORSRC; break;
1180 case wxSRC_INVERT: rop = MGL_R2_NOTCOPYSRC; break;
1181 case wxOR_INVERT: rop = MGL_R2_MERGENOTSRC; break;
1182 case wxNAND: rop = MGL_R2_NOTMASKSRC; break;
1183 case wxOR: rop = MGL_R2_MERGESRC; break;
1184 case wxSET: rop = MGL_R2_WHITE; break;
1185 default:
1186 wxFAIL_MSG( wxT("unsupported logical function") );
1187 return MGL_REPLACE_MODE;
1188 }
1189 return (int)rop;
1190 }
1191
1192 bool wxDC::StartDoc(const wxString& message)
1193 {
1194 // We might be previewing, so return TRUE to let it continue.
1195 return TRUE;
1196 }
1197
1198 void wxDC::EndDoc()
1199 {
1200 }
1201
1202 void wxDC::StartPage()
1203 {
1204 }
1205
1206 void wxDC::EndPage()
1207 {
1208 }
1209
1210 // ---------------------------------------------------------------------------
1211 // text metrics
1212 // ---------------------------------------------------------------------------
1213
1214 wxCoord wxDC::GetCharHeight() const
1215 {
1216 wxCurrentDCSwitcher switcher(m_MGLDC);
1217 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1218 return YDEV2LOGREL(m_mglFont->fontHeight);
1219 }
1220
1221 wxCoord wxDC::GetCharWidth() const
1222 {
1223 wxCurrentDCSwitcher switcher(m_MGLDC);
1224 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1225 // VS: wxT() is intentional, charWidth() has both char and wchar_t version
1226 // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
1227 // scaled according to m_scaleY
1228 return YDEV2LOGREL(m_mglFont->fontWidth);
1229 }
1230
1231 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1232 wxCoord *descent, wxCoord *externalLeading,
1233 wxFont *theFont) const
1234 {
1235 wxFont oldFont;
1236
1237 if ( theFont != NULL )
1238 {
1239 oldFont = m_font;
1240 wxConstCast(this, wxDC)->SetFont(*theFont);
1241 }
1242
1243 wxCurrentDCSwitcher switcher(m_MGLDC);
1244 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return;
1245
1246 if ( x )
1247 // VS: YDEV is corrent, it should *not* be XDEV, because font's are
1248 // only scaled according to m_scaleY
1249 *x = YDEV2LOGREL(m_MGLDC->textWidth(string.c_str()));
1250 if ( y )
1251 *y = YDEV2LOGREL(m_MGLDC->textHeight());
1252 if ( descent )
1253 *descent = YDEV2LOGREL(m_mglFont->descent);
1254 if ( externalLeading )
1255 *externalLeading = YDEV2LOGREL(m_mglFont->leading);
1256
1257 if ( theFont != NULL )
1258 wxConstCast(this, wxDC)->SetFont(oldFont);
1259 }
1260
1261
1262
1263 // ---------------------------------------------------------------------------
1264 // mapping modes
1265 // ---------------------------------------------------------------------------
1266
1267 void wxDC::ComputeScaleAndOrigin()
1268 {
1269 double newX = m_logicalScaleX * m_userScaleX;
1270 double newY = m_logicalScaleY * m_userScaleY;
1271
1272 // make sure font will be reloaded before drawing:
1273 if ( newY != m_scaleY )
1274 m_mglFont = NULL;
1275 // make sure m_penOfs{X,Y} will be reevaluated before drawing:
1276 if ( newY != m_scaleY || newX != m_scaleX )
1277 m_penSelected = FALSE;
1278
1279 m_scaleX = newX, m_scaleY = newY;
1280 }
1281
1282 void wxDC::SetMapMode(int mode)
1283 {
1284 switch (mode)
1285 {
1286 case wxMM_TWIPS:
1287 SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
1288 break;
1289 case wxMM_POINTS:
1290 SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
1291 break;
1292 case wxMM_METRIC:
1293 SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
1294 break;
1295 case wxMM_LOMETRIC:
1296 SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
1297 break;
1298 default:
1299 case wxMM_TEXT:
1300 SetLogicalScale(1.0, 1.0);
1301 break;
1302 }
1303 m_mappingMode = mode;
1304 }
1305
1306 void wxDC::SetUserScale( double x, double y )
1307 {
1308 // allow negative ? -> no
1309 m_userScaleX = x;
1310 m_userScaleY = y;
1311 ComputeScaleAndOrigin();
1312 }
1313
1314 void wxDC::SetLogicalScale( double x, double y )
1315 {
1316 // allow negative ?
1317 m_logicalScaleX = x;
1318 m_logicalScaleY = y;
1319 ComputeScaleAndOrigin();
1320 }
1321
1322 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
1323 {
1324 m_logicalOriginX = x * m_signX; // is this still correct ?
1325 m_logicalOriginY = y * m_signY;
1326 ComputeScaleAndOrigin();
1327 }
1328
1329 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
1330 {
1331 // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
1332 m_deviceOriginX = x;
1333 m_deviceOriginY = y;
1334 ComputeScaleAndOrigin();
1335 }
1336
1337 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
1338 {
1339 // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
1340 m_signX = (xLeftRight ? 1 : -1);
1341 m_signY = (yBottomUp ? -1 : 1);
1342 ComputeScaleAndOrigin();
1343 }
1344
1345 // ---------------------------------------------------------------------------
1346 // coordinates transformations
1347 // ---------------------------------------------------------------------------
1348
1349 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1350 {
1351 return ((wxDC *)this)->XDEV2LOG(x);
1352 }
1353
1354 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1355 {
1356 return ((wxDC *)this)->YDEV2LOG(y);
1357 }
1358
1359 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1360 {
1361 return ((wxDC *)this)->XDEV2LOGREL(x);
1362 }
1363
1364 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1365 {
1366 return ((wxDC *)this)->YDEV2LOGREL(y);
1367 }
1368
1369 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1370 {
1371 return ((wxDC *)this)->XLOG2DEV(x);
1372 }
1373
1374 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1375 {
1376 return ((wxDC *)this)->YLOG2DEV(y);
1377 }
1378
1379 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1380 {
1381 return ((wxDC *)this)->XLOG2DEVREL(x);
1382 }
1383
1384 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1385 {
1386 return ((wxDC *)this)->YLOG2DEVREL(y);
1387 }
1388
1389
1390 void wxDC::DoGetSize(int *w, int *h) const
1391 {
1392 if (w) *w = m_MGLDC->sizex()+1;
1393 if (h) *h = m_MGLDC->sizey()+1;
1394 }
1395
1396 void wxDC::DoGetSizeMM(int *width, int *height) const
1397 {
1398 int w = 0;
1399 int h = 0;
1400 GetSize(&w, &h);
1401 if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
1402 if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
1403 }
1404
1405 wxSize wxDC::GetPPI() const
1406 {
1407 return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
1408 int(double(m_mm_to_pix_y) * inches2mm));
1409 }
1410
1411
1412 // ---------------------------------------------------------------------------
1413 // Blitting
1414 // ---------------------------------------------------------------------------
1415
1416 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1417 wxCoord width, wxCoord height,
1418 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1419 int rop, bool useMask,
1420 wxCoord xsrcMask, wxCoord ysrcMask)
1421 {
1422 wxCHECK_MSG( Ok(), FALSE, wxT("invalid dc") );
1423 wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
1424
1425 // transform the source DC coords to the device ones
1426 xsrc = source->LogicalToDeviceX(xsrc);
1427 ysrc = source->LogicalToDeviceY(ysrc);
1428
1429 /* FIXME_MGL: use the mask origin when drawing transparently */
1430 if (xsrcMask == -1 && ysrcMask == -1)
1431 {
1432 xsrcMask = xsrc; ysrcMask = ysrc;
1433 }
1434 else
1435 {
1436 xsrcMask = source->LogicalToDeviceX(xsrcMask);
1437 ysrcMask = source->LogicalToDeviceY(ysrcMask);
1438 }
1439
1440 CalcBoundingBox(xdest, ydest);
1441 CalcBoundingBox(xdest + width, ydest + height);
1442
1443 /* scale/translate size and position */
1444 wxCoord xx = XLOG2DEV(xdest);
1445 wxCoord yy = YLOG2DEV(ydest);
1446 wxCoord ww = XLOG2DEVREL(width);
1447 wxCoord hh = YLOG2DEVREL(height);
1448
1449 if ( source->m_isMemDC )
1450 {
1451 wxMemoryDC *memDC = (wxMemoryDC*) source;
1452 DoDrawSubBitmap(memDC->GetSelectedObject(), xsrc, ysrc, ww, hh,
1453 xdest, ydest, rop, useMask);
1454 }
1455 else
1456 {
1457 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1458 m_MGLDC->bitBlt(*source->GetMGLDC(),
1459 xsrc, ysrc, xsrc + ww, ysrc + hh,
1460 xx, yy, LogicalFunctionToMGLRop(rop));
1461 }
1462
1463 return TRUE;
1464 }
1465
1466 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
1467 {
1468 wxCHECK_RET( Ok(), wxT("invalid dc") );
1469 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1470
1471 wxCoord w = bmp.GetWidth();
1472 wxCoord h = bmp.GetHeight();
1473
1474 DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
1475 }
1476
1477 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
1478 {
1479 // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
1480 DoDrawBitmap((const wxBitmap&)icon, x, y, (bool)TRUE);
1481 }
1482
1483
1484 static inline void DoBitBlt(const wxBitmap& src, MGLDevCtx *dst,
1485 int sx, int sy, int sw, int sh,
1486 int dx, int dy, int dw, int dh,
1487 int rop, bool useStretching, bool putSection)
1488 {
1489 bitmap_t *bmp = src.GetMGLbitmap_t();
1490 if (!useStretching)
1491 {
1492 if (!putSection)
1493 dst->putBitmap(dx, dy, bmp, rop);
1494 else
1495 dst->putBitmapSection(sx, sy, sx + sw, sy + sh, dx, dy, bmp, rop);
1496 }
1497 else
1498 {
1499 if (!putSection)
1500 dst->stretchBitmap(dx, dy, dx + dw, dy + dh, bmp, rop);
1501 else
1502 dst->stretchBitmapSection(sx, sy, sx + sw, sy + sh,
1503 dx, dy, dx + dw, dy + dh, bmp, rop);
1504 }
1505 }
1506
1507 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
1508 wxCoord x, wxCoord y, wxCoord w, wxCoord h,
1509 wxCoord destx, wxCoord desty, int rop, bool useMask)
1510 {
1511 wxCHECK_RET( Ok(), wxT("invalid dc") );
1512 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1513
1514 CalcBoundingBox(x, y);
1515 CalcBoundingBox(x + w, y + h);
1516
1517 wxCoord dx = XLOG2DEV(destx);
1518 wxCoord dy = YLOG2DEV(desty);
1519 wxCoord dw = XLOG2DEVREL(w);
1520 wxCoord dh = YLOG2DEVREL(h);
1521
1522 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1523
1524 bool useStretching = ((w != dw) || (h != dh));
1525 bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
1526 MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
1527
1528 if ( bmp.GetDepth() == 1 )
1529 {
1530 // Mono bitmaps are handled in special way -- all 1s are drawn in
1531 // foreground colours, all 0s in background colour.
1532
1533 ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
1534 }
1535
1536 if ( useMask && bmp.GetMask() )
1537 {
1538 // Since MGL does not support masks directly (in MGL, mask is handled
1539 // in same way as in wxImage, i.e. there is one "key" color), we
1540 // simulate masked bitblt in 6 steps (same as in MSW):
1541 //
1542 // 1. Create a temporary bitmap and copy the destination area into it.
1543 // 2. Copy the source area into the temporary bitmap using the
1544 // specified logical function.
1545 // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
1546 // the mask bitmap with the temp bitmap with the foreground colour
1547 // set to WHITE and the bg colour set to BLACK.
1548 // 4. Set the unmasked area in the destination area to BLACK by
1549 // ANDing the mask bitmap with the destination area with the
1550 // foreground colour set to BLACK and the background colour set
1551 // to WHITE.
1552 // 5. OR the temporary bitmap with the destination area.
1553 // 6. Delete the temporary bitmap.
1554 //
1555 // This sequence of operations ensures that the source's transparent
1556 // area need not be black, and logical functions are supported.
1557
1558 wxBitmap *mask = bmp.GetMask()->GetBitmap();
1559
1560 MGLMemoryDC *temp;
1561
1562 if ( GetDepth() <= 8 )
1563 {
1564 temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
1565 wxDC tempdc;
1566 tempdc.SetMGLDC(temp, FALSE);
1567 tempdc.SetPalette(m_palette);
1568 }
1569 else
1570 {
1571 pixel_format_t pf;
1572 m_MGLDC->getPixelFormat(pf);
1573 temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
1574 }
1575
1576 wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
1577
1578 temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
1579
1580 DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
1581 useStretching, putSection);
1582
1583 mask->SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
1584 DoBitBlt(*mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
1585 useStretching, putSection);
1586 DoBitBlt(*mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
1587 useStretching, putSection);
1588
1589 m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
1590
1591 delete temp;
1592 }
1593
1594 else
1595 {
1596 DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
1597 useStretching, putSection);
1598 }
1599 }
wxWidgets (Impactor)