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Applied FloodFill patch
[wxWidgets.git] / src / mgl / dc.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: dc.cpp
3 // Purpose: wxDC class
4 // Author: Vaclav Slavik
5 // Created: 2001/03/09
6 // RCS-ID: $Id$
7 // Copyright: (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
8 // Licence: wxWindows licence
9 /////////////////////////////////////////////////////////////////////////////
10
11 // ===========================================================================
12 // declarations
13 // ===========================================================================
14
15 // ---------------------------------------------------------------------------
16 // headers
17 // ---------------------------------------------------------------------------
18
19 #ifdef __GNUG__
20 #pragma implementation "dc.h"
21 #endif
22
23 // For compilers that support precompilation, includes "wx.h".
24 #include "wx/wxprec.h"
25
26 #ifdef __BORLANDC__
27 #pragma hdrstop
28 #endif
29
30 #ifndef WX_PRECOMP
31 #include "wx/dc.h"
32 #include "wx/dcmemory.h"
33 #endif
34
35 #include "wx/fontutil.h"
36 #include "wx/fontmap.h"
37 #include "wx/mgl/private.h"
38 #include "wx/log.h"
39
40 #include <string.h>
41 #include <math.h>
42 #include <mgraph.hpp>
43
44
45
46 //-----------------------------------------------------------------------------
47 // constants
48 //-----------------------------------------------------------------------------
49
50 #ifndef M_PI
51 #define M_PI 3.14159265358979323846
52 #endif
53
54 const double mm2inches = 0.0393700787402;
55 const double inches2mm = 25.4;
56 const double mm2twips = 56.6929133859;
57 const double twips2mm = 0.0176388888889;
58 const double mm2pt = 2.83464566929;
59 const double pt2mm = 0.352777777778;
60 const double RAD2DEG = 180.0 / M_PI;
61
62
63 //-----------------------------------------------------------------------------
64 // pens data:
65 //-----------------------------------------------------------------------------
66
67 const ushort STIPPLE_wxDOT = 0x5555/* - - - - - - - -*/;
68 const ushort STIPPLE_wxLONG_DASH = 0xF0F0/* ---- ----*/;
69 const ushort STIPPLE_wxSHORT_DASH = 0xCCCC/*-- -- -- -- */;
70 const ushort STIPPLE_wxDOT_DASH = 0x3939/* --- - --- -*/;
71 const ushort STIPPLE_wxSOLID = 0xFFFF/*----------------*/;
72
73 #define PATTERN_ROW(b7,b6,b5,b4,b3,b2,b1,b0) \
74 ((b7 << 7) | (b6 << 6) | (b5 << 5) | (b4 << 4) | \
75 (b3 << 3) | (b2 << 2) | (b1 << 1) | b0)
76
77 static pattern_t PATTERN_wxFDIAGONAL_HATCH = {{
78 PATTERN_ROW(1,0,0,0,0,0,0,0),
79 PATTERN_ROW(0,1,0,0,0,0,0,0),
80 PATTERN_ROW(0,0,1,0,0,0,0,0),
81 PATTERN_ROW(0,0,0,1,0,0,0,0),
82 PATTERN_ROW(0,0,0,0,1,0,0,0),
83 PATTERN_ROW(0,0,0,0,0,1,0,0),
84 PATTERN_ROW(0,0,0,0,0,0,1,0),
85 PATTERN_ROW(0,0,0,0,0,0,0,1),
86 }};
87
88 static pattern_t PATTERN_wxCROSSDIAG_HATCH = {{
89 PATTERN_ROW(1,0,0,0,0,0,0,1),
90 PATTERN_ROW(0,1,0,0,0,0,1,0),
91 PATTERN_ROW(0,0,1,0,0,1,0,0),
92 PATTERN_ROW(0,0,0,1,1,0,0,0),
93 PATTERN_ROW(0,0,0,1,1,0,0,0),
94 PATTERN_ROW(0,0,1,0,0,1,0,0),
95 PATTERN_ROW(0,1,0,0,0,0,1,0),
96 PATTERN_ROW(1,0,0,0,0,0,0,1),
97 }};
98
99 static pattern_t PATTERN_wxBDIAGONAL_HATCH = {{
100 PATTERN_ROW(0,0,0,0,0,0,0,1),
101 PATTERN_ROW(0,0,0,0,0,0,1,0),
102 PATTERN_ROW(0,0,0,0,0,1,0,0),
103 PATTERN_ROW(0,0,0,0,1,0,0,0),
104 PATTERN_ROW(0,0,0,1,0,0,0,0),
105 PATTERN_ROW(0,0,1,0,0,0,0,0),
106 PATTERN_ROW(0,1,0,0,0,0,0,0),
107 PATTERN_ROW(1,0,0,0,0,0,0,0),
108 }};
109
110 static pattern_t PATTERN_wxCROSS_HATCH = {{
111 PATTERN_ROW(0,0,0,1,0,0,0,0),
112 PATTERN_ROW(0,0,0,1,0,0,0,0),
113 PATTERN_ROW(0,0,0,1,0,0,0,0),
114 PATTERN_ROW(1,1,1,1,1,1,1,1),
115 PATTERN_ROW(0,0,0,1,0,0,0,0),
116 PATTERN_ROW(0,0,0,1,0,0,0,0),
117 PATTERN_ROW(0,0,0,1,0,0,0,0),
118 PATTERN_ROW(0,0,0,1,0,0,0,0),
119 }};
120
121 static pattern_t PATTERN_wxHORIZONTAL_HATCH = {{
122 PATTERN_ROW(0,0,0,0,0,0,0,0),
123 PATTERN_ROW(0,0,0,0,0,0,0,0),
124 PATTERN_ROW(0,0,0,0,0,0,0,0),
125 PATTERN_ROW(1,1,1,1,1,1,1,1),
126 PATTERN_ROW(0,0,0,0,0,0,0,0),
127 PATTERN_ROW(0,0,0,0,0,0,0,0),
128 PATTERN_ROW(0,0,0,0,0,0,0,0),
129 PATTERN_ROW(0,0,0,0,0,0,0,0),
130 }};
131
132 static pattern_t PATTERN_wxVERTICAL_HATCH = {{
133 PATTERN_ROW(0,0,0,1,0,0,0,0),
134 PATTERN_ROW(0,0,0,1,0,0,0,0),
135 PATTERN_ROW(0,0,0,1,0,0,0,0),
136 PATTERN_ROW(0,0,0,1,0,0,0,0),
137 PATTERN_ROW(0,0,0,1,0,0,0,0),
138 PATTERN_ROW(0,0,0,1,0,0,0,0),
139 PATTERN_ROW(0,0,0,1,0,0,0,0),
140 PATTERN_ROW(0,0,0,1,0,0,0,0),
141 }};
142
143 #undef PATTERN_ROW
144
145 //-----------------------------------------------------------------------------
146 // wxDC
147 //-----------------------------------------------------------------------------
148
149 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
150
151 // Default constructor
152 wxDC::wxDC()
153 {
154 m_isMemDC = FALSE;
155 m_MGLDC = NULL;
156 m_OwnsMGLDC = FALSE;
157 m_ok = FALSE; // must call SetMGLDevCtx() before using it
158
159 m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
160 (double)wxGetDisplaySizeMM().GetWidth();
161 m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
162 (double)wxGetDisplaySizeMM().GetHeight();
163
164 m_pen = *wxBLACK_PEN;
165 m_font = *wxNORMAL_FONT;
166 m_brush = *wxWHITE_BRUSH;
167 m_penOfsX = m_penOfsY = 0;
168
169 m_penSelected = m_brushSelected = FALSE;
170 m_downloadedPatterns[0] = m_downloadedPatterns[1] = FALSE;
171
172 m_mglFont = NULL;
173 }
174
175
176 wxDC::~wxDC()
177 {
178 if (m_OwnsMGLDC)
179 delete m_MGLDC;
180 }
181
182 void wxDC::SetMGLDC(MGLDevCtx *mgldc, bool OwnsMGLDC)
183 {
184 if ( m_OwnsMGLDC && m_MGLDC )
185 delete m_MGLDC;
186 m_MGLDC = mgldc;
187 m_OwnsMGLDC = OwnsMGLDC;
188 m_ok = TRUE;
189
190 if ( !m_globalClippingRegion.IsNull() )
191 SetClippingRegion(m_globalClippingRegion);
192
193 InitializeMGLDC();
194 }
195
196 void wxDC::InitializeMGLDC()
197 {
198 if ( GetDepth() > 8 )
199 {
200 wxCurrentDCSwitcher switcher(m_MGLDC); // will go away with MGL6
201 m_MGLDC->setFontBlendMode(MGL_AA_RGBBLEND);
202 }
203 }
204
205
206 // ---------------------------------------------------------------------------
207 // clipping
208 // ---------------------------------------------------------------------------
209
210
211 #define DO_SET_CLIPPING_BOX(rg) \
212 { \
213 wxRect rect = rg.GetBox(); \
214 m_clipX1 = (wxCoord) XDEV2LOG(rect.GetLeft()); \
215 m_clipY1 = (wxCoord) YDEV2LOG(rect.GetTop()); \
216 m_clipX2 = (wxCoord) XDEV2LOG(rect.GetRight()); \
217 m_clipY2 = (wxCoord) YDEV2LOG(rect.GetBottom()); \
218 }
219
220 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
221 {
222 wxCHECK_RET( Ok(), wxT("invalid dc") );
223
224 wxRect rect(XLOG2DEV(cx), YLOG2DEV(cy), XLOG2DEVREL(cw), YLOG2DEVREL(ch));
225
226 if ( !m_currentClippingRegion.IsNull() )
227 m_currentClippingRegion.Intersect(rect);
228 else
229 m_currentClippingRegion.Union(rect);
230
231 m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
232
233 m_clipping = TRUE;
234 DO_SET_CLIPPING_BOX(m_currentClippingRegion)
235 }
236
237 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
238 {
239 wxCHECK_RET( Ok(), wxT("invalid dc") );
240
241 if ( region.IsEmpty() )
242 {
243 DestroyClippingRegion();
244 return;
245 }
246
247 wxRegion rg(region);
248
249 // check if the DC is scaled or moved, and if yes, then
250 // convert rg to device coordinates:
251 if ( m_deviceOriginX != 0 || m_deviceOriginY != 0 ||
252 m_logicalOriginX != 0 || m_logicalOriginY != 0 ||
253 XLOG2DEVREL(500) != 500 || YLOG2DEVREL(500) != 500 )
254 {
255 region_t *mrg = rg.GetMGLRegion().rgnPointer();
256 span_t *s;
257 segment_t *p;
258 for (s = mrg->spans; s; s = s->next)
259 {
260 s->y = YLOG2DEV(s->y);
261 for (p = s->seg; p; p = p->next)
262 p->x = XLOG2DEV(p->x);
263 }
264 }
265
266 if ( !m_currentClippingRegion.IsNull() )
267 m_currentClippingRegion.Intersect(rg);
268 else
269 m_currentClippingRegion.Union(rg);
270
271 m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
272
273 m_clipping = TRUE;
274 DO_SET_CLIPPING_BOX(m_currentClippingRegion)
275 }
276
277 void wxDC::DestroyClippingRegion()
278 {
279 wxCHECK_RET( Ok(), wxT("invalid dc") );
280
281 if ( !m_globalClippingRegion.IsNull() )
282 {
283 m_MGLDC->setClipRegion(m_globalClippingRegion.GetMGLRegion());
284 m_currentClippingRegion = m_globalClippingRegion;
285 m_clipping = TRUE;
286 }
287 else
288 {
289 m_MGLDC->setClipRect(MGLRect(0, 0, m_MGLDC->sizex()+1, m_MGLDC->sizey()+1));
290 m_clipping = FALSE;
291 m_currentClippingRegion.Clear();
292 }
293 }
294
295 // ---------------------------------------------------------------------------
296 // query capabilities
297 // ---------------------------------------------------------------------------
298
299 bool wxDC::CanDrawBitmap() const
300 {
301 return TRUE;
302 }
303
304 bool wxDC::CanGetTextExtent() const
305 {
306 return TRUE;
307 }
308
309 int wxDC::GetDepth() const
310 {
311 return m_MGLDC->getBitsPerPixel();
312 }
313
314 // ---------------------------------------------------------------------------
315 // drawing
316 // ---------------------------------------------------------------------------
317
318 void wxDC::Clear()
319 {
320 wxCHECK_RET( Ok(), wxT("invalid dc") );
321
322 m_MGLDC->makeCurrent(); // will go away with MGL6.0
323 if ( m_backgroundBrush.GetStyle() != wxTRANSPARENT )
324 {
325 int w, h;
326 wxBrush oldb = m_brush;
327 SetBrush(m_backgroundBrush);
328 SelectBrush();
329 GetSize(&w, &h);
330 m_MGLDC->fillRect(0, 0, w, h);
331 SetBrush(oldb);
332 }
333 }
334
335 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
336 {
337 if (GetBrush().GetStyle() == wxTRANSPARENT)
338 {
339 wxLogDebug(wxT("In FloodFill, Current Brush is transparent, no filling done"));
340 return ;
341 }
342 int height = 0;
343 int width = 0;
344 this->GetSize(&width, &height);
345 //it would be nice to fail if we don't get a sensible size...
346 if (width < 1 || height < 1)
347 {
348 wxLogError(wxT("In FloodFill, dc.GetSize routine failed, method not supported by this DC"));
349 return ;
350 }
351
352 //this is much faster than doing the individual pixels
353 wxMemoryDC memdc;
354 wxBitmap bitmap(width, height);
355 memdc.SelectObject(bitmap);
356 memdc.Blit(0, 0, width, height, (wxDC*) this, 0, 0);
357 memdc.SelectObject(wxNullBitmap);
358
359 wxImage image(bitmap);
360 image.DoFloodFill (x,y, GetBrush(), col, style, GetLogicalFunction());
361 bitmap = wxBitmap(image);
362 memdc.SelectObject(bitmap);
363 this->Blit(0, 0, width, height, &memdc, 0, 0);
364 memdc.SelectObject(wxNullBitmap);
365 }
366
367 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
368 {
369 wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel"));
370
371 uchar r, g, b;
372 m_MGLDC->unpackColorFast(m_MGLDC->getPixel(XLOG2DEV(x), YLOG2DEV(y)),
373 r, g, b);
374 col->Set(r, g, b);
375 return TRUE;
376 }
377
378 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
379 {
380 wxCHECK_RET( Ok(), wxT("invalid dc") );
381
382 if ( m_pen.GetStyle() != wxTRANSPARENT )
383 {
384 int w = 0;
385 int h = 0;
386 GetSize(&w, &h);
387 m_MGLDC->makeCurrent(); // will go away with MGL6.0
388 if ( !m_penSelected )
389 SelectPen();
390 wxCoord xx = XLOG2DEV(x);
391 wxCoord yy = YLOG2DEV(y);
392 m_MGLDC->line(m_penOfsX, yy + m_penOfsY, w-1 + m_penOfsX, yy + m_penOfsY);
393 m_MGLDC->line(xx + m_penOfsX, m_penOfsY, x + m_penOfsX, h-1 + m_penOfsY);
394 CalcBoundingBox(0, 0);
395 CalcBoundingBox(w, h);
396 }
397 }
398
399 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
400 {
401 wxCHECK_RET( Ok(), wxT("invalid dc") );
402
403 if ( m_pen.GetStyle() != wxTRANSPARENT )
404 {
405 m_MGLDC->makeCurrent(); // will go away with MGL6.0
406 if ( !m_penSelected )
407 SelectPen();
408 m_MGLDC->lineExt(XLOG2DEV(x1) + m_penOfsX, YLOG2DEV(y1) + m_penOfsY,
409 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY,FALSE);
410 CalcBoundingBox(x1, y1);
411 CalcBoundingBox(x2, y2);
412 }
413 }
414
415 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
416 // and ending at (x2, y2)
417 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
418 wxCoord x2, wxCoord y2,
419 wxCoord xc, wxCoord yc)
420 {
421 wxCHECK_RET( Ok(), wxT("invalid dc") );
422
423 wxCoord xx1 = XLOG2DEV(x1);
424 wxCoord yy1 = YLOG2DEV(y1);
425 wxCoord xx2 = XLOG2DEV(x2);
426 wxCoord yy2 = YLOG2DEV(y2);
427 wxCoord xxc = XLOG2DEV(xc);
428 wxCoord yyc = YLOG2DEV(yc);
429 double dx = xx1 - xxc;
430 double dy = yy1 - yyc;
431 double radius = sqrt((double)(dx*dx+dy*dy));
432 wxCoord r = (wxCoord)radius;
433 double radius1, radius2;
434
435
436 if (xx1 == xx2 && yy1 == yy2)
437 {
438 radius1 = 0.0;
439 radius2 = 360.0;
440 }
441 else if (radius == 0.0)
442 {
443 radius1 = radius2 = 0.0;
444 }
445 else
446 {
447 radius1 = (xx1 - xxc == 0) ?
448 (yy1 - yyc < 0) ? 90.0 : -90.0 :
449 -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
450 radius2 = (xx2 - xxc == 0) ?
451 (yy2 - yyc < 0) ? 90.0 : -90.0 :
452 -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
453 }
454 wxCoord alpha1 = wxCoord(radius1);
455 wxCoord alpha2 = alpha1 + wxCoord(radius2 - radius1);
456 while (alpha2 <= 0) alpha2 += 360;
457 while (alpha1 > 360) alpha1 -= 360;
458
459 m_MGLDC->makeCurrent(); // will go away with MGL6.0
460 if ( m_brush.GetStyle() != wxTRANSPARENT )
461 {
462 if ( !m_brushSelected )
463 SelectBrush();
464 m_MGLDC->fillEllipseArc(xxc, yyc, r, r, alpha1, alpha2);
465 }
466
467 if ( m_pen.GetStyle() != wxTRANSPARENT )
468 {
469 if ( !m_penSelected )
470 SelectPen();
471 m_MGLDC->ellipseArc(xxc + m_penOfsX, yyc + m_penOfsY, r, r, alpha1, alpha2);
472 }
473
474 CalcBoundingBox(xc - r, yc - r);
475 CalcBoundingBox(xc + r, yc + r);
476 }
477
478 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
479 {
480 wxCHECK_RET( Ok(), wxT("invalid dc") );
481
482 if ( m_pen.GetStyle() != wxTRANSPARENT )
483 {
484 m_MGLDC->makeCurrent(); // will go away with MGL6.0
485 if ( !m_penSelected )
486 SelectPen();
487 m_MGLDC->pixel(XLOG2DEV(x), YLOG2DEV(y));
488 CalcBoundingBox(x, y);
489 }
490 }
491
492 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
493 {
494 wxCHECK_RET( Ok(), wxT("invalid dc") );
495
496 wxCoord xxoffset = XLOG2DEVREL(xoffset),
497 yyoffset = YLOG2DEVREL(yoffset);
498 MGLPoint *cpoints = new MGLPoint[n+1];
499 for (int i = 0; i < n; i++)
500 {
501 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
502 cpoints[i].x = (int)(XLOG2DEV(points[i].x));
503 cpoints[i].y = (int)(YLOG2DEV(points[i].y));
504 }
505 cpoints[n] = cpoints[0];
506
507 m_MGLDC->makeCurrent(); // will go away with MGL6.0
508 if ( m_brush.GetStyle() != wxTRANSPARENT )
509 {
510 if ( !m_brushSelected )
511 SelectBrush();
512 m_MGLDC->fillPolygon(n, cpoints, xxoffset, yyoffset);
513 }
514
515 if ( m_pen.GetStyle() != wxTRANSPARENT )
516 {
517 if ( !m_penSelected )
518 SelectPen();
519 if (m_penOfsX != 0 || m_penOfsY != 0)
520 {
521 for (int i = 0; i <= n; i++)
522 {
523 cpoints[i].x += m_penOfsX;
524 cpoints[i].y += m_penOfsY;
525 }
526 }
527 m_MGLDC->polyLine(n+1, cpoints);
528 }
529
530 delete[] cpoints;
531 }
532
533 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
534 {
535 wxCHECK_RET( Ok(), wxT("invalid dc") );
536
537 if ( m_pen.GetStyle() != wxTRANSPARENT )
538 {
539 MGLPoint *cpoints = new MGLPoint[n];
540 m_MGLDC->makeCurrent(); // will go away with MGL6.0
541 if ( !m_penSelected )
542 SelectPen();
543 for (int i = 0; i < n; i++)
544 {
545 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
546 cpoints[i].x = (int)(XLOG2DEV(points[i].x + xoffset) /*+ m_penOfsX*/);
547 cpoints[i].y = (int)(YLOG2DEV(points[i].y + yoffset) /*+ m_penOfsY*/);
548 }
549 m_MGLDC->polyLine(n, cpoints);
550 delete[] cpoints;
551 }
552 }
553
554 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
555 {
556 wxCHECK_RET( Ok(), wxT("invalid dc") );
557
558 wxCoord xx = XLOG2DEV(x);
559 wxCoord yy = YLOG2DEV(y);
560 wxCoord ww = m_signX * XLOG2DEVREL(width);
561 wxCoord hh = m_signY * YLOG2DEVREL(height);
562
563 if ( ww == 0 || hh == 0 ) return;
564
565 if ( ww < 0 )
566 {
567 ww = -ww;
568 xx = xx - ww;
569 }
570 if ( hh < 0 )
571 {
572 hh = -hh;
573 yy = yy - hh;
574 }
575
576 m_MGLDC->makeCurrent(); // will go away with MGL6.0
577 if ( m_brush.GetStyle() != wxTRANSPARENT )
578 {
579 if ( !m_brushSelected )
580 SelectBrush();
581 m_MGLDC->fillRect(xx, yy, xx + ww, yy + hh);
582 }
583
584 if ( m_pen.GetStyle() != wxTRANSPARENT )
585 {
586 if ( !m_penSelected )
587 SelectPen();
588
589 m_MGLDC->rect(xx + m_penOfsX, yy + m_penOfsY,
590 xx + ww + m_penOfsX, yy + hh + m_penOfsY);
591 }
592
593 CalcBoundingBox(x, y);
594 CalcBoundingBox(x + width, y + height);
595 }
596
597 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
598 {
599 wxCHECK_RET( Ok(), wxT("invalid dc") );
600
601 if ( radius < 0.0 )
602 radius = -radius * ((width < height) ? width : height);
603
604 wxCoord xx = XLOG2DEV(x);
605 wxCoord yy = YLOG2DEV(y);
606 wxCoord ww = m_signX * XLOG2DEVREL(width);
607 wxCoord hh = m_signY * YLOG2DEVREL(height);
608 wxCoord rr = XLOG2DEVREL((wxCoord)radius);
609
610 // CMB: handle -ve width and/or height
611 if ( ww < 0 )
612 {
613 ww = -ww;
614 xx = xx - ww;
615 }
616 if ( hh < 0 )
617 {
618 hh = -hh;
619 yy = yy - hh;
620 }
621
622 // CMB: if radius is zero use DrawRectangle() instead to avoid
623 // X drawing errors with small radii
624 if ( rr == 0 )
625 {
626 DrawRectangle(x, y, width, height);
627 return;
628 }
629
630 // CMB: draw nothing if transformed w or h is 0
631 if ( ww == 0 || hh == 0 ) return;
632
633 // CMB: ensure dd is not larger than rectangle otherwise we
634 // get an hour glass shape
635 wxCoord dd = 2 * rr;
636 if ( dd > ww ) dd = ww;
637 if ( dd > hh ) dd = hh;
638 rr = dd / 2;
639
640 m_MGLDC->makeCurrent(); // will go away with MGL6.0
641 if ( m_brush.GetStyle() != wxTRANSPARENT )
642 {
643 if (!m_brushSelected)
644 SelectBrush();
645 m_MGLDC->fillRect(xx+rr, yy, xx+ww-rr, yy+hh);
646 m_MGLDC->fillRect(xx, yy+rr, xx+ww, yy+hh-rr);
647 m_MGLDC->fillEllipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
648 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
649 m_MGLDC->fillEllipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
650 m_MGLDC->fillEllipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
651 }
652
653 if ( m_pen.GetStyle() != wxTRANSPARENT )
654 {
655 if ( !m_penSelected )
656 SelectPen();
657 xx += m_penOfsX;
658 yy += m_penOfsY;
659 m_MGLDC->line(xx+rr+1, yy, xx+ww-rr, yy);
660 m_MGLDC->ellipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
661 m_MGLDC->line(xx+ww, yy+rr+1, xx+ww, yy+hh-rr);
662 m_MGLDC->ellipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
663 m_MGLDC->line(xx+ww-rr, yy+hh, xx+rr+1, yy+hh);
664 m_MGLDC->ellipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
665 m_MGLDC->line(xx, yy+hh-rr, xx, yy+rr+1);
666 m_MGLDC->ellipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
667 }
668
669 CalcBoundingBox(x, y);
670 CalcBoundingBox(x + width, y + height);
671 }
672
673 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
674 {
675 wxCHECK_RET( Ok(), wxT("invalid dc") );
676
677 wxCoord x2 = (x+width);
678 wxCoord y2 = (y+height);
679
680 m_MGLDC->makeCurrent(); // will go away with MGL6.0
681 if ( m_brush.GetStyle() != wxTRANSPARENT )
682 {
683 if ( !m_brushSelected )
684 SelectBrush();
685 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
686 m_MGLDC->fillEllipse(rect);
687 }
688
689 if ( m_pen.GetStyle() != wxTRANSPARENT )
690 {
691 if ( !m_penSelected )
692 SelectPen();
693 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
694 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
695 m_MGLDC->ellipse(rect);
696 }
697
698 CalcBoundingBox(x, y);
699 CalcBoundingBox(x2, y2);
700 }
701
702 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
703 {
704 wxCHECK_RET( Ok(), wxT("invalid dc") );
705
706 wxCoord x2 = (x+w);
707 wxCoord y2 = (y+h);
708
709 m_MGLDC->makeCurrent(); // will go away with MGL6.0
710 if ( m_brush.GetStyle() != wxTRANSPARENT )
711 {
712 if (!m_brushSelected) SelectBrush();
713 MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
714 m_MGLDC->fillEllipseArc(rect, (int)sa, (int)ea);
715 }
716
717 if ( m_pen.GetStyle() != wxTRANSPARENT )
718 {
719 if ( !m_penSelected )
720 SelectPen();
721 MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
722 XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
723 m_MGLDC->ellipseArc(rect, (int)sa, (int)ea);
724 }
725
726 CalcBoundingBox(x, y);
727 CalcBoundingBox(x2, y2);
728 }
729
730 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
731 {
732 m_MGLDC->makeCurrent(); // will go away with MGL6.0
733 DrawAnyText(text, x, y);
734
735 // update the bounding box
736 wxCoord w, h;
737 CalcBoundingBox(x, y);
738 GetTextExtent(text, &w, &h);
739 CalcBoundingBox(x + w, y + h);
740 }
741
742 bool wxDC::SelectMGLFont()
743 {
744 if ( m_mglFont == NULL )
745 {
746 float scale = m_scaleY;
747 bool antialiased = (GetDepth() > 8);
748
749 m_mglFont = m_font.GetMGLfont_t(scale, antialiased);
750 wxCHECK_MSG( m_mglFont, FALSE, wxT("invalid font") );
751
752 m_MGLDC->useFont(m_mglFont);
753 wxLogTrace("mgl_font", "useFont(%p)", m_mglFont);
754
755 #if !wxUSE_UNICODE
756 wxNativeEncodingInfo nativeEnc;
757 wxFontEncoding encoding = m_font.GetEncoding();
758 if ( !wxGetNativeFontEncoding(encoding, &nativeEnc) ||
759 !wxTestFontEncoding(nativeEnc) )
760 {
761 #if wxUSE_FONTMAP
762 if ( !wxTheFontMapper->GetAltForEncoding(encoding, &nativeEnc) )
763 #endif
764 {
765 nativeEnc.mglEncoding = MGL_ENCODING_ASCII;
766 }
767 }
768 m_MGLDC->setTextEncoding(nativeEnc.mglEncoding);
769 #endif
770 }
771 return TRUE;
772 }
773
774 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
775 {
776 wxCHECK_RET( Ok(), wxT("invalid dc") );
777
778 SelectMGLFont();
779
780 // Render the text:
781 wxCoord xx = XLOG2DEV(x);
782 wxCoord yy = YLOG2DEV(y);
783
784 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
785 m_MGLDC->setLineStipple(0xFFFF);
786 m_MGLDC->setPenSize(1, 1);
787 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
788
789 #if wxUSE_UNICODE
790 const wchar_t *c_text = text.c_str();
791 #else
792 const char *c_text = text.c_str();
793 #endif
794
795 #if 1
796 // FIXME_MGL - this is a temporary hack in absence of proper
797 // implementation of solid text background in MGL. Once
798 // the bug in MGL is fixed, this code should be nuked
799 // immediately. Note that the code is not 100% correct;
800 // it only works with wxCOPY logical function
801 if ( m_backgroundMode == wxSOLID )
802 {
803 int w = m_MGLDC->textWidth(c_text);
804 int h = m_MGLDC->textHeight();
805 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
806 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
807 m_MGLDC->fillRect(xx, yy, xx+w, yy+h);
808 }
809 #endif
810
811 m_MGLDC->setColor(m_MGLDC->packColorFast(m_textForegroundColour.Red(),
812 m_textForegroundColour.Green(), m_textForegroundColour.Blue()));
813 m_MGLDC->setBackColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
814 m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
815
816 m_MGLDC->drawStr(xx, yy, c_text);
817
818 // Render underline:
819 if ( m_font.GetUnderlined() )
820 {
821 int x1 = xx, y1 = yy;
822 int x2 = 0 , y2 = 0;
823 int w = m_MGLDC->textWidth(c_text);
824 m_MGLDC->underScoreLocation(x1, y1, c_text);
825 switch (m_MGLDC->getTextDirection())
826 {
827 case MGL_RIGHT_DIR: x2 = x1 + w, y2 = y1; break;
828 case MGL_LEFT_DIR: x2 = x1 - w, y2 = y1; break;
829 case MGL_UP_DIR: x2 = x1, y2 = y1 - w; break;
830 case MGL_DOWN_DIR: x2 = x1, y2 = y1 + w; break;
831 }
832 m_MGLDC->line(x1, y1, x2, y2);
833 }
834
835 m_penSelected = m_brushSelected = FALSE;
836 }
837
838 void wxDC::DoDrawRotatedText(const wxString& text,
839 wxCoord x, wxCoord y,
840 double angle)
841 {
842 m_MGLDC->makeCurrent(); // will go away with MGL6.0
843
844 if ( angle == 0 )
845 {
846 DoDrawText(text, x, y);
847 return;
848 }
849 else if ( angle == 90.0 )
850 m_MGLDC->setTextDirection(MGL_UP_DIR);
851 else if ( angle == 180.0 )
852 m_MGLDC->setTextDirection(MGL_LEFT_DIR);
853 else if ( angle == 270.0 )
854 m_MGLDC->setTextDirection(MGL_DOWN_DIR);
855 else
856 {
857 // FIXME_MGL -- implement once MGL supports it
858 wxFAIL_MSG(wxT("wxMGL only supports rotated text with angle 0,90,180 or 270"));
859 return;
860 }
861
862 DrawAnyText(text, x, y);
863
864 // Restore default:
865 m_MGLDC->setTextDirection(MGL_RIGHT_DIR);
866 }
867
868 // ---------------------------------------------------------------------------
869 // set GDI objects
870 // ---------------------------------------------------------------------------
871
872 void wxDC::SelectMGLStipplePen(int style)
873 {
874 ushort stipple;
875
876 switch (style)
877 {
878 case wxDOT: stipple = STIPPLE_wxDOT; break;
879 case wxLONG_DASH: stipple = STIPPLE_wxLONG_DASH; break;
880 case wxSHORT_DASH: stipple = STIPPLE_wxSHORT_DASH; break;
881 case wxDOT_DASH: stipple = STIPPLE_wxDOT_DASH; break;
882 default: stipple = STIPPLE_wxSOLID; break;
883 }
884
885 m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
886 m_MGLDC->setLineStipple(stipple);
887 m_MGLDC->setPenSize(1, 1);
888 m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
889 m_penOfsY = m_penOfsX = 0;
890 }
891
892 // Accepted valus of SelectMGLFatPen's 2nd argument
893 enum {
894 wxMGL_SELECT_FROM_PEN,
895 wxMGL_SELECT_FROM_BRUSH
896 };
897
898 void wxDC::SelectMGLFatPen(int style, int flag)
899 {
900 MGL_penStyleType penstyle;
901 const pattern_t *pattern = NULL;
902 pixpattern24_t *pixPattern = NULL;
903 int wx, wy;
904 int slot;
905
906 // Since MGL pens may be created from wxBrush or wxPen and we often
907 // switch between pens and brushes, we take advantage of MGL's ability
908 // to have multiple (pix)pattern_t's loaded. We always download pen
909 // to 0th slot and brush to 1st slot.
910 if ( flag == wxMGL_SELECT_FROM_PEN )
911 slot = 0;
912 else
913 slot = 1;
914
915 // compute pen's width:
916 if ( m_pen.GetWidth() <= 1 )
917 {
918 wx = wy = 1;
919 m_penOfsX = m_penOfsY = 0;
920 }
921 else
922 {
923 wx = (int)(0.5 + fabs((double) XLOG2DEVREL(m_pen.GetWidth())));
924 wy = (int)(0.5 + fabs((double) YLOG2DEVREL(m_pen.GetWidth())));
925 m_penOfsX = -wx/2;
926 m_penOfsY = -wy/2;
927 }
928
929 // find pen's type:
930 penstyle = MGL_BITMAP_TRANSPARENT;
931 switch (style)
932 {
933 case wxBDIAGONAL_HATCH: pattern = &PATTERN_wxBDIAGONAL_HATCH;
934 penstyle = MGL_BITMAP_TRANSPARENT;
935 break;
936 case wxCROSSDIAG_HATCH: pattern = &PATTERN_wxCROSSDIAG_HATCH;
937 penstyle = MGL_BITMAP_TRANSPARENT;
938 break;
939 case wxFDIAGONAL_HATCH: pattern = &PATTERN_wxFDIAGONAL_HATCH;
940 penstyle = MGL_BITMAP_TRANSPARENT;
941 break;
942 case wxCROSS_HATCH: pattern = &PATTERN_wxCROSS_HATCH;
943 penstyle = MGL_BITMAP_TRANSPARENT;
944 break;
945 case wxHORIZONTAL_HATCH: pattern = &PATTERN_wxHORIZONTAL_HATCH;
946 penstyle = MGL_BITMAP_TRANSPARENT;
947 break;
948 case wxVERTICAL_HATCH: pattern = &PATTERN_wxVERTICAL_HATCH;
949 penstyle = MGL_BITMAP_TRANSPARENT;
950 break;
951
952 case wxSTIPPLE:
953 if ( flag == wxMGL_SELECT_FROM_PEN )
954 pixPattern = (pixpattern24_t*) m_pen.GetPixPattern();
955 else
956 pixPattern = (pixpattern24_t*) m_brush.GetPixPattern();
957 penstyle = MGL_PIXMAP;
958 break;
959
960 case wxSTIPPLE_MASK_OPAQUE:
961 pattern = (pattern_t*) m_brush.GetMaskPattern();
962 penstyle = MGL_BITMAP_OPAQUE;
963 break;
964
965 case wxSOLID:
966 default:
967 penstyle = MGL_BITMAP_SOLID; break;
968 }
969
970 // ...and finally, pass the pen to MGL:
971
972 if ( pattern )
973 {
974 if ( !m_downloadedPatterns[slot] )
975 {
976 m_MGLDC->setPenBitmapPattern(slot, pattern);
977 m_downloadedPatterns[slot] = TRUE;
978 }
979 m_MGLDC->usePenBitmapPattern(slot);
980 }
981
982 if ( pixPattern )
983 {
984 if ( !m_downloadedPatterns[slot] )
985 {
986 pixpattern_t pix;
987 int x, y, c;
988
989 switch (GetDepth())
990 {
991 case 8:
992 for (y = 0; y < 8; y++)
993 for (x = 0; x < 8; x++)
994 pix.b8.p[x][y] = m_MGLDC->packColorFast(
995 pixPattern->p[x][y][0],
996 pixPattern->p[x][y][1],
997 pixPattern->p[x][y][2]);
998 break;
999 case 15:
1000 case 16:
1001 for (y = 0; y < 8; y++)
1002 for (x = 0; x < 8; x++)
1003 pix.b16.p[x][y] = m_MGLDC->packColorFast(
1004 pixPattern->p[x][y][0],
1005 pixPattern->p[x][y][1],
1006 pixPattern->p[x][y][2]);
1007 break;
1008 case 24:
1009 for (y = 0; y < 8; y++)
1010 for (x = 0; x < 8; x++)
1011 for (c = 0; c < 3; c++)
1012 pix.b24.p[x][y][c] = pixPattern->p[x][y][c];
1013 break;
1014 case 32:
1015 for (y = 0; y < 8; y++)
1016 for (x = 0; x < 8; x++)
1017 pix.b32.p[x][y] = m_MGLDC->packColorFast(
1018 pixPattern->p[x][y][0],
1019 pixPattern->p[x][y][1],
1020 pixPattern->p[x][y][2]);
1021 break;
1022 default:
1023 wxFAIL_MSG(_T("invalid DC depth"));
1024 break;
1025 }
1026 m_MGLDC->setPenPixmapPattern(slot, &pix);
1027 m_downloadedPatterns[slot] = TRUE;
1028 }
1029 m_MGLDC->usePenPixmapPattern(slot);
1030 }
1031
1032 m_MGLDC->setLineStyle(MGL_LINE_PENSTYLE);
1033 m_MGLDC->setPenStyle(penstyle);
1034 m_MGLDC->setPenSize(wy, wx);
1035 }
1036
1037 void wxDC::SelectPen()
1038 {
1039 wxCHECK_RET( Ok(), wxT("invalid dc") );
1040
1041 wxColour& clr = m_pen.GetColour();
1042 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1043 m_MGLDC->setColorRGB(clr.Red(), clr.Green(), clr.Blue());
1044
1045 switch (m_pen.GetStyle())
1046 {
1047 case wxTRANSPARENT:
1048 break;
1049
1050 case wxDOT:
1051 case wxLONG_DASH:
1052 case wxSHORT_DASH:
1053 case wxDOT_DASH:
1054 SelectMGLStipplePen(m_pen.GetStyle());
1055 break;
1056
1057 case wxBDIAGONAL_HATCH:
1058 case wxCROSSDIAG_HATCH:
1059 case wxFDIAGONAL_HATCH:
1060 case wxCROSS_HATCH:
1061 case wxHORIZONTAL_HATCH:
1062 case wxVERTICAL_HATCH:
1063 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1064 break;
1065
1066 case wxSTIPPLE:
1067 SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
1068 break;
1069
1070 case wxSOLID:
1071 case wxUSER_DASH:
1072 default:
1073 if ( m_pen.GetWidth() <= 1 )
1074 SelectMGLStipplePen(wxSOLID);
1075 else
1076 SelectMGLFatPen(wxSOLID, wxMGL_SELECT_FROM_PEN);
1077 break;
1078 }
1079 m_penSelected = TRUE;
1080 m_brushSelected = FALSE;
1081 }
1082
1083 void wxDC::SelectBrush()
1084 {
1085 wxCHECK_RET( Ok(), wxT("invalid dc") );
1086
1087 wxColour fg, bg;
1088 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1089
1090 if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
1091 {
1092 fg = m_textForegroundColour;
1093 bg = m_textBackgroundColour;
1094 }
1095 else
1096 {
1097 fg = m_brush.GetColour();
1098 bg = m_backgroundBrush.GetColour();
1099 }
1100
1101 m_MGLDC->setColorRGB(fg.Red(), fg.Green(), fg.Blue());
1102 m_MGLDC->setBackColor(m_MGLDC->packColorFast(bg.Red(), bg.Green(), bg.Blue()));
1103 m_penSelected = FALSE;
1104 m_brushSelected = TRUE;
1105
1106 SelectMGLFatPen(m_brush.GetStyle(), wxMGL_SELECT_FROM_BRUSH);
1107 }
1108
1109 void wxDC::SetPen(const wxPen& pen)
1110 {
1111 if ( !pen.Ok() ) return;
1112 if ( m_pen == pen ) return;
1113 m_pen = pen;
1114 m_penSelected = FALSE;
1115 m_downloadedPatterns[0] = FALSE;
1116 }
1117
1118 void wxDC::SetBrush(const wxBrush& brush)
1119 {
1120 if ( !brush.Ok() ) return;
1121 if ( m_brush == brush ) return;
1122 m_brush = brush;
1123 m_brushSelected = FALSE;
1124 m_downloadedPatterns[1] = FALSE;
1125 }
1126
1127 void wxDC::SetPalette(const wxPalette& palette)
1128 {
1129 wxCHECK_RET( Ok(), wxT("invalid dc") );
1130
1131 if ( palette == wxNullPalette )
1132 {
1133 if ( m_oldPalette.Ok() )
1134 SetPalette(m_oldPalette);
1135 return;
1136 }
1137
1138 if ( !palette.Ok() ) return;
1139 if ( m_palette == palette ) return;
1140 m_oldPalette = m_palette;
1141 m_palette = palette;
1142
1143 int cnt = m_palette.GetColoursCount();
1144 palette_t *pal = m_palette.GetMGLpalette_t();
1145 m_MGLDC->setPalette(pal, cnt, 0);
1146 m_MGLDC->realizePalette(cnt, 0, TRUE);
1147 }
1148
1149 void wxDC::SetFont(const wxFont& font)
1150 {
1151 if ( font.Ok() )
1152 {
1153 m_font = font;
1154 m_mglFont = NULL;
1155 }
1156 }
1157
1158 void wxDC::SetBackground(const wxBrush& brush)
1159 {
1160 wxCHECK_RET( Ok(), wxT("invalid dc") );
1161
1162 if (!m_backgroundBrush.Ok()) return;
1163
1164 m_backgroundBrush = brush;
1165 wxColour &clr = m_backgroundBrush.GetColour();
1166 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1167 m_MGLDC->setBackColor(
1168 m_MGLDC->packColorFast(clr.Red(), clr.Green(), clr.Blue()));
1169 }
1170
1171 void wxDC::SetBackgroundMode(int mode)
1172 {
1173 m_backgroundMode = mode;
1174 if ( mode == wxSOLID )
1175 m_MGLDC->setBackMode(MGL_OPAQUE_BACKGROUND);
1176 else
1177 m_MGLDC->setBackMode(MGL_TRANSPARENT_BACKGROUND);
1178 }
1179
1180 void wxDC::SetLogicalFunction(int function)
1181 {
1182 wxCHECK_RET( Ok(), wxT("invalid dc") );
1183
1184 m_logicalFunction = function;
1185
1186 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1187 m_MGLDC->setWriteMode(LogicalFunctionToMGLRop(m_logicalFunction));
1188 }
1189
1190 int wxDC::LogicalFunctionToMGLRop(int logFunc) const
1191 {
1192 MGL_writeModeType rop;
1193
1194 switch (logFunc)
1195 {
1196 case wxCLEAR: rop = MGL_R2_BLACK; break;
1197 case wxXOR: rop = MGL_R2_XORSRC; break;
1198 case wxINVERT: rop = MGL_R2_NOT; break;
1199 case wxOR_REVERSE: rop = MGL_R2_MERGESRCNOT; break;
1200 case wxAND_REVERSE: rop = MGL_R2_MASKSRCNOT; break;
1201 case wxCOPY: rop = MGL_R2_COPYSRC; break;
1202 case wxAND: rop = MGL_R2_MASKSRC; break;
1203 case wxAND_INVERT: rop = MGL_R2_MASKNOTSRC; break;
1204 case wxNO_OP: rop = MGL_R2_NOP; break;
1205 case wxNOR: rop = MGL_R2_NOTMERGESRC; break;
1206 case wxEQUIV: rop = MGL_R2_NOTXORSRC; break;
1207 case wxSRC_INVERT: rop = MGL_R2_NOTCOPYSRC; break;
1208 case wxOR_INVERT: rop = MGL_R2_MERGENOTSRC; break;
1209 case wxNAND: rop = MGL_R2_NOTMASKSRC; break;
1210 case wxOR: rop = MGL_R2_MERGESRC; break;
1211 case wxSET: rop = MGL_R2_WHITE; break;
1212 default:
1213 wxFAIL_MSG( wxT("unsupported logical function") );
1214 return MGL_REPLACE_MODE;
1215 }
1216 return (int)rop;
1217 }
1218
1219 bool wxDC::StartDoc(const wxString& message)
1220 {
1221 // We might be previewing, so return TRUE to let it continue.
1222 return TRUE;
1223 }
1224
1225 void wxDC::EndDoc()
1226 {
1227 }
1228
1229 void wxDC::StartPage()
1230 {
1231 }
1232
1233 void wxDC::EndPage()
1234 {
1235 }
1236
1237 // ---------------------------------------------------------------------------
1238 // text metrics
1239 // ---------------------------------------------------------------------------
1240
1241 wxCoord wxDC::GetCharHeight() const
1242 {
1243 wxCurrentDCSwitcher switcher(m_MGLDC);
1244 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1245 return YDEV2LOGREL(m_mglFont->fontHeight);
1246 }
1247
1248 wxCoord wxDC::GetCharWidth() const
1249 {
1250 wxCurrentDCSwitcher switcher(m_MGLDC);
1251 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
1252 // VS: wxT() is intentional, charWidth() has both char and wchar_t version
1253 // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
1254 // scaled according to m_scaleY
1255 return YDEV2LOGREL(m_mglFont->fontWidth);
1256 }
1257
1258 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1259 wxCoord *descent, wxCoord *externalLeading,
1260 wxFont *theFont) const
1261 {
1262 wxFont oldFont;
1263
1264 if ( theFont != NULL )
1265 {
1266 oldFont = m_font;
1267 wxConstCast(this, wxDC)->SetFont(*theFont);
1268 }
1269
1270 wxCurrentDCSwitcher switcher(m_MGLDC);
1271 if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return;
1272
1273 if ( x )
1274 // VS: YDEV is corrent, it should *not* be XDEV, because font's are
1275 // only scaled according to m_scaleY
1276 *x = YDEV2LOGREL(m_MGLDC->textWidth(string.c_str()));
1277 if ( y )
1278 *y = YDEV2LOGREL(m_MGLDC->textHeight());
1279 if ( descent )
1280 *descent = YDEV2LOGREL(m_mglFont->descent);
1281 if ( externalLeading )
1282 *externalLeading = YDEV2LOGREL(m_mglFont->leading);
1283
1284 if ( theFont != NULL )
1285 wxConstCast(this, wxDC)->SetFont(oldFont);
1286 }
1287
1288
1289
1290 // ---------------------------------------------------------------------------
1291 // mapping modes
1292 // ---------------------------------------------------------------------------
1293
1294 void wxDC::ComputeScaleAndOrigin()
1295 {
1296 double newX = m_logicalScaleX * m_userScaleX;
1297 double newY = m_logicalScaleY * m_userScaleY;
1298
1299 // make sure font will be reloaded before drawing:
1300 if ( newY != m_scaleY )
1301 m_mglFont = NULL;
1302 // make sure m_penOfs{X,Y} will be reevaluated before drawing:
1303 if ( newY != m_scaleY || newX != m_scaleX )
1304 m_penSelected = FALSE;
1305
1306 m_scaleX = newX, m_scaleY = newY;
1307 }
1308
1309 void wxDC::SetMapMode(int mode)
1310 {
1311 switch (mode)
1312 {
1313 case wxMM_TWIPS:
1314 SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
1315 break;
1316 case wxMM_POINTS:
1317 SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
1318 break;
1319 case wxMM_METRIC:
1320 SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
1321 break;
1322 case wxMM_LOMETRIC:
1323 SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
1324 break;
1325 default:
1326 case wxMM_TEXT:
1327 SetLogicalScale(1.0, 1.0);
1328 break;
1329 }
1330 m_mappingMode = mode;
1331 }
1332
1333 void wxDC::SetUserScale( double x, double y )
1334 {
1335 // allow negative ? -> no
1336 m_userScaleX = x;
1337 m_userScaleY = y;
1338 ComputeScaleAndOrigin();
1339 }
1340
1341 void wxDC::SetLogicalScale( double x, double y )
1342 {
1343 // allow negative ?
1344 m_logicalScaleX = x;
1345 m_logicalScaleY = y;
1346 ComputeScaleAndOrigin();
1347 }
1348
1349 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
1350 {
1351 m_logicalOriginX = x * m_signX; // is this still correct ?
1352 m_logicalOriginY = y * m_signY;
1353 ComputeScaleAndOrigin();
1354 }
1355
1356 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
1357 {
1358 // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
1359 m_deviceOriginX = x;
1360 m_deviceOriginY = y;
1361 ComputeScaleAndOrigin();
1362 }
1363
1364 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
1365 {
1366 // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
1367 m_signX = (xLeftRight ? 1 : -1);
1368 m_signY = (yBottomUp ? -1 : 1);
1369 ComputeScaleAndOrigin();
1370 }
1371
1372 // ---------------------------------------------------------------------------
1373 // coordinates transformations
1374 // ---------------------------------------------------------------------------
1375
1376 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1377 {
1378 return ((wxDC *)this)->XDEV2LOG(x);
1379 }
1380
1381 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1382 {
1383 return ((wxDC *)this)->YDEV2LOG(y);
1384 }
1385
1386 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1387 {
1388 return ((wxDC *)this)->XDEV2LOGREL(x);
1389 }
1390
1391 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1392 {
1393 return ((wxDC *)this)->YDEV2LOGREL(y);
1394 }
1395
1396 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1397 {
1398 return ((wxDC *)this)->XLOG2DEV(x);
1399 }
1400
1401 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1402 {
1403 return ((wxDC *)this)->YLOG2DEV(y);
1404 }
1405
1406 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1407 {
1408 return ((wxDC *)this)->XLOG2DEVREL(x);
1409 }
1410
1411 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1412 {
1413 return ((wxDC *)this)->YLOG2DEVREL(y);
1414 }
1415
1416
1417 void wxDC::DoGetSize(int *w, int *h) const
1418 {
1419 if (w) *w = m_MGLDC->sizex()+1;
1420 if (h) *h = m_MGLDC->sizey()+1;
1421 }
1422
1423 void wxDC::DoGetSizeMM(int *width, int *height) const
1424 {
1425 int w = 0;
1426 int h = 0;
1427 GetSize(&w, &h);
1428 if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
1429 if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
1430 }
1431
1432 wxSize wxDC::GetPPI() const
1433 {
1434 return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
1435 int(double(m_mm_to_pix_y) * inches2mm));
1436 }
1437
1438
1439 // ---------------------------------------------------------------------------
1440 // Blitting
1441 // ---------------------------------------------------------------------------
1442
1443 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1444 wxCoord width, wxCoord height,
1445 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1446 int rop, bool useMask,
1447 wxCoord xsrcMask, wxCoord ysrcMask)
1448 {
1449 wxCHECK_MSG( Ok(), FALSE, wxT("invalid dc") );
1450 wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
1451
1452 // transform the source DC coords to the device ones
1453 xsrc = source->LogicalToDeviceX(xsrc);
1454 ysrc = source->LogicalToDeviceY(ysrc);
1455
1456 /* FIXME_MGL: use the mask origin when drawing transparently */
1457 if (xsrcMask == -1 && ysrcMask == -1)
1458 {
1459 xsrcMask = xsrc; ysrcMask = ysrc;
1460 }
1461 else
1462 {
1463 xsrcMask = source->LogicalToDeviceX(xsrcMask);
1464 ysrcMask = source->LogicalToDeviceY(ysrcMask);
1465 }
1466
1467 CalcBoundingBox(xdest, ydest);
1468 CalcBoundingBox(xdest + width, ydest + height);
1469
1470 /* scale/translate size and position */
1471 wxCoord xx = XLOG2DEV(xdest);
1472 wxCoord yy = YLOG2DEV(ydest);
1473 wxCoord ww = XLOG2DEVREL(width);
1474 wxCoord hh = YLOG2DEVREL(height);
1475
1476 if ( source->m_isMemDC )
1477 {
1478 wxMemoryDC *memDC = (wxMemoryDC*) source;
1479 DoDrawSubBitmap(memDC->GetSelectedObject(), xsrc, ysrc, ww, hh,
1480 xdest, ydest, rop, useMask);
1481 }
1482 else
1483 {
1484 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1485 m_MGLDC->bitBlt(*source->GetMGLDC(),
1486 xsrc, ysrc, xsrc + ww, ysrc + hh,
1487 xx, yy, LogicalFunctionToMGLRop(rop));
1488 }
1489
1490 return TRUE;
1491 }
1492
1493 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
1494 {
1495 wxCHECK_RET( Ok(), wxT("invalid dc") );
1496 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1497
1498 wxCoord w = bmp.GetWidth();
1499 wxCoord h = bmp.GetHeight();
1500
1501 DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
1502 }
1503
1504 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
1505 {
1506 // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
1507 DoDrawBitmap((const wxBitmap&)icon, x, y, (bool)TRUE);
1508 }
1509
1510
1511 static inline void DoBitBlt(const wxBitmap& src, MGLDevCtx *dst,
1512 int sx, int sy, int sw, int sh,
1513 int dx, int dy, int dw, int dh,
1514 int rop, bool useStretching, bool putSection)
1515 {
1516 bitmap_t *bmp = src.GetMGLbitmap_t();
1517 if (!useStretching)
1518 {
1519 if (!putSection)
1520 dst->putBitmap(dx, dy, bmp, rop);
1521 else
1522 dst->putBitmapSection(sx, sy, sx + sw, sy + sh, dx, dy, bmp, rop);
1523 }
1524 else
1525 {
1526 if (!putSection)
1527 dst->stretchBitmap(dx, dy, dx + dw, dy + dh, bmp, rop);
1528 else
1529 dst->stretchBitmapSection(sx, sy, sx + sw, sy + sh,
1530 dx, dy, dx + dw, dy + dh, bmp, rop);
1531 }
1532 }
1533
1534 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
1535 wxCoord x, wxCoord y, wxCoord w, wxCoord h,
1536 wxCoord destx, wxCoord desty, int rop, bool useMask)
1537 {
1538 wxCHECK_RET( Ok(), wxT("invalid dc") );
1539 wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
1540
1541 CalcBoundingBox(x, y);
1542 CalcBoundingBox(x + w, y + h);
1543
1544 wxCoord dx = XLOG2DEV(destx);
1545 wxCoord dy = YLOG2DEV(desty);
1546 wxCoord dw = XLOG2DEVREL(w);
1547 wxCoord dh = YLOG2DEVREL(h);
1548
1549 m_MGLDC->makeCurrent(); // will go away with MGL6.0
1550
1551 bool useStretching = ((w != dw) || (h != dh));
1552 bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
1553 MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
1554
1555 if ( bmp.GetDepth() == 1 )
1556 {
1557 // Mono bitmaps are handled in special way -- all 1s are drawn in
1558 // foreground colours, all 0s in background colour.
1559
1560 ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
1561 }
1562
1563 if ( useMask && bmp.GetMask() )
1564 {
1565 // Since MGL does not support masks directly (in MGL, mask is handled
1566 // in same way as in wxImage, i.e. there is one "key" color), we
1567 // simulate masked bitblt in 6 steps (same as in MSW):
1568 //
1569 // 1. Create a temporary bitmap and copy the destination area into it.
1570 // 2. Copy the source area into the temporary bitmap using the
1571 // specified logical function.
1572 // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
1573 // the mask bitmap with the temp bitmap with the foreground colour
1574 // set to WHITE and the bg colour set to BLACK.
1575 // 4. Set the unmasked area in the destination area to BLACK by
1576 // ANDing the mask bitmap with the destination area with the
1577 // foreground colour set to BLACK and the background colour set
1578 // to WHITE.
1579 // 5. OR the temporary bitmap with the destination area.
1580 // 6. Delete the temporary bitmap.
1581 //
1582 // This sequence of operations ensures that the source's transparent
1583 // area need not be black, and logical functions are supported.
1584
1585 wxBitmap *mask = bmp.GetMask()->GetBitmap();
1586
1587 MGLMemoryDC *temp;
1588
1589 if ( GetDepth() <= 8 )
1590 {
1591 temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
1592 wxDC tempdc;
1593 tempdc.SetMGLDC(temp, FALSE);
1594 tempdc.SetPalette(m_palette);
1595 }
1596 else
1597 {
1598 pixel_format_t pf;
1599 m_MGLDC->getPixelFormat(pf);
1600 temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
1601 }
1602
1603 wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
1604
1605 temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
1606
1607 DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
1608 useStretching, putSection);
1609
1610 mask->SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
1611 DoBitBlt(*mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
1612 useStretching, putSection);
1613 DoBitBlt(*mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
1614 useStretching, putSection);
1615
1616 m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
1617
1618 delete temp;
1619 }
1620
1621 else
1622 {
1623 DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
1624 useStretching, putSection);
1625 }
1626 }
wxWidgets (Impactor)