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Test for wxPen validity before testing for its style in wxGTK wxDC.
[wxWidgets.git] / src / gtk / dcclient.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/dcclient.cpp
3 // Purpose: wxWindowDCImpl implementation
4 // Author: Robert Roebling
5 // RCS-ID: $Id$
6 // Copyright: (c) 1998 Robert Roebling, Chris Breeze
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
9
10 // For compilers that support precompilation, includes "wx.h".
11 #include "wx/wxprec.h"
12
13 #include "wx/gtk/dcclient.h"
14
15 #ifndef WX_PRECOMP
16 #include "wx/window.h"
17 #include "wx/log.h"
18 #include "wx/dcmemory.h"
19 #include "wx/math.h"
20 #include "wx/image.h"
21 #include "wx/module.h"
22 #endif
23
24 #include "wx/fontutil.h"
25
26 #include "wx/gtk/private.h"
27 #include "wx/gtk/private/object.h"
28
29 //-----------------------------------------------------------------------------
30 // local defines
31 //-----------------------------------------------------------------------------
32
33 #define XLOG2DEV(x) LogicalToDeviceX(x)
34 #define XLOG2DEVREL(x) LogicalToDeviceXRel(x)
35 #define YLOG2DEV(y) LogicalToDeviceY(y)
36 #define YLOG2DEVREL(y) LogicalToDeviceYRel(y)
37
38 #define USE_PAINT_REGION 1
39
40 //-----------------------------------------------------------------------------
41 // local data
42 //-----------------------------------------------------------------------------
43
44 #include "bdiag.xbm"
45 #include "fdiag.xbm"
46 #include "cdiag.xbm"
47 #include "horiz.xbm"
48 #include "verti.xbm"
49 #include "cross.xbm"
50
51 static GdkPixmap* hatches[wxBRUSHSTYLE_LAST_HATCH - wxBRUSHSTYLE_FIRST_HATCH + 1];
52
53 //-----------------------------------------------------------------------------
54 // constants
55 //-----------------------------------------------------------------------------
56
57 static const double RAD2DEG = 180.0 / M_PI;
58
59 // ----------------------------------------------------------------------------
60 // private functions
61 // ----------------------------------------------------------------------------
62
63 static inline double dmax(double a, double b) { return a > b ? a : b; }
64 static inline double dmin(double a, double b) { return a < b ? a : b; }
65
66 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
67
68 static GdkPixmap* GetHatch(int style)
69 {
70 wxASSERT(style >= wxBRUSHSTYLE_FIRST_HATCH && style <= wxBRUSHSTYLE_LAST_HATCH);
71 const int i = style - wxBRUSHSTYLE_FIRST_HATCH;
72 if (hatches[i] == NULL)
73 {
74 switch (style)
75 {
76 case wxBRUSHSTYLE_BDIAGONAL_HATCH:
77 hatches[i] = gdk_bitmap_create_from_data(NULL, bdiag_bits, bdiag_width, bdiag_height);
78 break;
79 case wxBRUSHSTYLE_CROSSDIAG_HATCH:
80 hatches[i] = gdk_bitmap_create_from_data(NULL, cdiag_bits, cdiag_width, cdiag_height);
81 break;
82 case wxBRUSHSTYLE_CROSS_HATCH:
83 hatches[i] = gdk_bitmap_create_from_data(NULL, cross_bits, cross_width, cross_height);
84 break;
85 case wxBRUSHSTYLE_FDIAGONAL_HATCH:
86 hatches[i] = gdk_bitmap_create_from_data(NULL, fdiag_bits, fdiag_width, fdiag_height);
87 break;
88 case wxBRUSHSTYLE_HORIZONTAL_HATCH:
89 hatches[i] = gdk_bitmap_create_from_data(NULL, horiz_bits, horiz_width, horiz_height);
90 break;
91 case wxBRUSHSTYLE_VERTICAL_HATCH:
92 hatches[i] = gdk_bitmap_create_from_data(NULL, verti_bits, verti_width, verti_height);
93 break;
94 }
95 }
96 return hatches[i];
97 }
98
99 //-----------------------------------------------------------------------------
100 // Implement Pool of Graphic contexts. Creating them takes too much time.
101 //-----------------------------------------------------------------------------
102
103 enum wxPoolGCType
104 {
105 wxGC_ERROR = 0,
106 wxTEXT_MONO,
107 wxBG_MONO,
108 wxPEN_MONO,
109 wxBRUSH_MONO,
110 wxTEXT_COLOUR,
111 wxBG_COLOUR,
112 wxPEN_COLOUR,
113 wxBRUSH_COLOUR,
114 wxTEXT_SCREEN,
115 wxBG_SCREEN,
116 wxPEN_SCREEN,
117 wxBRUSH_SCREEN
118 };
119
120 struct wxGC
121 {
122 GdkGC *m_gc;
123 wxPoolGCType m_type;
124 bool m_used;
125 };
126
127 #define GC_POOL_ALLOC_SIZE 100
128
129 static int wxGCPoolSize = 0;
130
131 static wxGC *wxGCPool = NULL;
132
133 static void wxInitGCPool()
134 {
135 // This really could wait until the first call to
136 // wxGetPoolGC, but we will make the first allocation
137 // now when other initialization is being performed.
138
139 // Set initial pool size.
140 wxGCPoolSize = GC_POOL_ALLOC_SIZE;
141
142 // Allocate initial pool.
143 wxGCPool = (wxGC *)malloc(wxGCPoolSize * sizeof(wxGC));
144 if (wxGCPool == NULL)
145 {
146 // If we cannot malloc, then fail with error
147 // when debug is enabled. If debug is not enabled,
148 // the problem will eventually get caught
149 // in wxGetPoolGC.
150 wxFAIL_MSG( wxT("Cannot allocate GC pool") );
151 return;
152 }
153
154 // Zero initial pool.
155 memset(wxGCPool, 0, wxGCPoolSize * sizeof(wxGC));
156 }
157
158 static void wxCleanUpGCPool()
159 {
160 for (int i = 0; i < wxGCPoolSize; i++)
161 {
162 if (wxGCPool[i].m_gc)
163 g_object_unref (wxGCPool[i].m_gc);
164 }
165
166 free(wxGCPool);
167 wxGCPool = NULL;
168 wxGCPoolSize = 0;
169 }
170
171 static GdkGC* wxGetPoolGC( GdkWindow *window, wxPoolGCType type )
172 {
173 wxGC *pptr;
174
175 // Look for an available GC.
176 for (int i = 0; i < wxGCPoolSize; i++)
177 {
178 if (!wxGCPool[i].m_gc)
179 {
180 wxGCPool[i].m_gc = gdk_gc_new( window );
181 gdk_gc_set_exposures( wxGCPool[i].m_gc, FALSE );
182 wxGCPool[i].m_type = type;
183 wxGCPool[i].m_used = false;
184 }
185 if ((!wxGCPool[i].m_used) && (wxGCPool[i].m_type == type))
186 {
187 wxGCPool[i].m_used = true;
188 return wxGCPool[i].m_gc;
189 }
190 }
191
192 // We did not find an available GC.
193 // We need to grow the GC pool.
194 pptr = (wxGC *)realloc(wxGCPool,
195 (wxGCPoolSize + GC_POOL_ALLOC_SIZE)*sizeof(wxGC));
196 if (pptr != NULL)
197 {
198 // Initialize newly allocated pool.
199 wxGCPool = pptr;
200 memset(&wxGCPool[wxGCPoolSize], 0,
201 GC_POOL_ALLOC_SIZE*sizeof(wxGC));
202
203 // Initialize entry we will return.
204 wxGCPool[wxGCPoolSize].m_gc = gdk_gc_new( window );
205 gdk_gc_set_exposures( wxGCPool[wxGCPoolSize].m_gc, FALSE );
206 wxGCPool[wxGCPoolSize].m_type = type;
207 wxGCPool[wxGCPoolSize].m_used = true;
208
209 // Set new value of pool size.
210 wxGCPoolSize += GC_POOL_ALLOC_SIZE;
211
212 // Return newly allocated entry.
213 return wxGCPool[wxGCPoolSize-GC_POOL_ALLOC_SIZE].m_gc;
214 }
215
216 // The realloc failed. Fall through to error.
217 wxFAIL_MSG( wxT("No GC available") );
218
219 return NULL;
220 }
221
222 static void wxFreePoolGC( GdkGC *gc )
223 {
224 for (int i = 0; i < wxGCPoolSize; i++)
225 {
226 if (wxGCPool[i].m_gc == gc)
227 {
228 wxGCPool[i].m_used = false;
229 return;
230 }
231 }
232
233 wxFAIL_MSG( wxT("Wrong GC") );
234 }
235
236 //-----------------------------------------------------------------------------
237 // wxWindowDC
238 //-----------------------------------------------------------------------------
239
240 IMPLEMENT_ABSTRACT_CLASS(wxWindowDCImpl, wxGTKDCImpl)
241
242 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner ) :
243 wxGTKDCImpl( owner )
244 {
245 m_gdkwindow = NULL;
246 m_penGC = NULL;
247 m_brushGC = NULL;
248 m_textGC = NULL;
249 m_bgGC = NULL;
250 m_cmap = NULL;
251 m_isScreenDC = false;
252 m_context = NULL;
253 m_layout = NULL;
254 m_fontdesc = NULL;
255 }
256
257 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window ) :
258 wxGTKDCImpl( owner )
259 {
260 wxASSERT_MSG( window, wxT("DC needs a window") );
261
262 m_gdkwindow = NULL;
263 m_penGC = NULL;
264 m_brushGC = NULL;
265 m_textGC = NULL;
266 m_bgGC = NULL;
267 m_cmap = NULL;
268 m_isScreenDC = false;
269 m_font = window->GetFont();
270
271 GtkWidget *widget = window->m_wxwindow;
272 m_gdkwindow = window->GTKGetDrawingWindow();
273
274 // Some controls don't have m_wxwindow - like wxStaticBox, but the user
275 // code should still be able to create wxClientDCs for them
276 if ( !widget )
277 {
278 widget = window->m_widget;
279
280 wxCHECK_RET(widget, "DC needs a widget");
281
282 m_gdkwindow = widget->window;
283 if (GTK_WIDGET_NO_WINDOW(widget))
284 SetDeviceLocalOrigin(widget->allocation.x, widget->allocation.y);
285 }
286
287 m_context = window->GTKGetPangoDefaultContext();
288 m_layout = pango_layout_new( m_context );
289 m_fontdesc = pango_font_description_copy( widget->style->font_desc );
290
291 // Window not realized ?
292 if (!m_gdkwindow)
293 {
294 // Don't report problems as per MSW.
295 m_ok = true;
296
297 return;
298 }
299
300 m_cmap = gtk_widget_get_colormap(widget);
301
302 SetUpDC();
303
304 /* this must be done after SetUpDC, bacause SetUpDC calls the
305 repective SetBrush, SetPen, SetBackground etc functions
306 to set up the DC. SetBackground call m_owner->SetBackground
307 and this might not be desired as the standard dc background
308 is white whereas a window might assume gray to be the
309 standard (as e.g. wxStatusBar) */
310
311 m_window = window;
312
313 if (m_window && m_window->m_wxwindow &&
314 (m_window->GetLayoutDirection() == wxLayout_RightToLeft))
315 {
316 // reverse sense
317 m_signX = -1;
318
319 // origin in the upper right corner
320 m_deviceOriginX = m_window->GetClientSize().x;
321 }
322 }
323
324 wxWindowDCImpl::~wxWindowDCImpl()
325 {
326 Destroy();
327
328 if (m_layout)
329 g_object_unref (m_layout);
330 if (m_fontdesc)
331 pango_font_description_free( m_fontdesc );
332 }
333
334 void wxWindowDCImpl::SetUpDC( bool isMemDC )
335 {
336 m_ok = true;
337
338 wxASSERT_MSG( !m_penGC, wxT("GCs already created") );
339
340 bool done = false;
341
342 if ((isMemDC) && (GetSelectedBitmap().IsOk()))
343 {
344 if (GetSelectedBitmap().GetDepth() == 1)
345 {
346 m_penGC = wxGetPoolGC( m_gdkwindow, wxPEN_MONO );
347 m_brushGC = wxGetPoolGC( m_gdkwindow, wxBRUSH_MONO );
348 m_textGC = wxGetPoolGC( m_gdkwindow, wxTEXT_MONO );
349 m_bgGC = wxGetPoolGC( m_gdkwindow, wxBG_MONO );
350 done = true;
351 }
352 }
353
354 if (!done)
355 {
356 if (m_isScreenDC)
357 {
358 m_penGC = wxGetPoolGC( m_gdkwindow, wxPEN_SCREEN );
359 m_brushGC = wxGetPoolGC( m_gdkwindow, wxBRUSH_SCREEN );
360 m_textGC = wxGetPoolGC( m_gdkwindow, wxTEXT_SCREEN );
361 m_bgGC = wxGetPoolGC( m_gdkwindow, wxBG_SCREEN );
362 }
363 else
364 {
365 m_penGC = wxGetPoolGC( m_gdkwindow, wxPEN_COLOUR );
366 m_brushGC = wxGetPoolGC( m_gdkwindow, wxBRUSH_COLOUR );
367 m_textGC = wxGetPoolGC( m_gdkwindow, wxTEXT_COLOUR );
368 m_bgGC = wxGetPoolGC( m_gdkwindow, wxBG_COLOUR );
369 }
370 }
371
372 /* background colour */
373 m_backgroundBrush = *wxWHITE_BRUSH;
374 m_backgroundBrush.GetColour().CalcPixel( m_cmap );
375 const GdkColor *bg_col = m_backgroundBrush.GetColour().GetColor();
376
377 /* m_textGC */
378 m_textForegroundColour.CalcPixel( m_cmap );
379 gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
380
381 m_textBackgroundColour.CalcPixel( m_cmap );
382 gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
383
384 gdk_gc_set_fill( m_textGC, GDK_SOLID );
385
386 gdk_gc_set_colormap( m_textGC, m_cmap );
387
388 /* m_penGC */
389 m_pen.GetColour().CalcPixel( m_cmap );
390 gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
391 gdk_gc_set_background( m_penGC, bg_col );
392
393 gdk_gc_set_line_attributes( m_penGC, 0, GDK_LINE_SOLID, GDK_CAP_NOT_LAST, GDK_JOIN_ROUND );
394
395 /* m_brushGC */
396 m_brush.GetColour().CalcPixel( m_cmap );
397 gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
398 gdk_gc_set_background( m_brushGC, bg_col );
399
400 gdk_gc_set_fill( m_brushGC, GDK_SOLID );
401
402 /* m_bgGC */
403 gdk_gc_set_background( m_bgGC, bg_col );
404 gdk_gc_set_foreground( m_bgGC, bg_col );
405
406 gdk_gc_set_fill( m_bgGC, GDK_SOLID );
407
408 /* ROPs */
409 gdk_gc_set_function( m_textGC, GDK_COPY );
410 gdk_gc_set_function( m_brushGC, GDK_COPY );
411 gdk_gc_set_function( m_penGC, GDK_COPY );
412
413 /* clipping */
414 gdk_gc_set_clip_rectangle( m_penGC, NULL );
415 gdk_gc_set_clip_rectangle( m_brushGC, NULL );
416 gdk_gc_set_clip_rectangle( m_textGC, NULL );
417 gdk_gc_set_clip_rectangle( m_bgGC, NULL );
418 }
419
420 void wxWindowDCImpl::DoGetSize( int* width, int* height ) const
421 {
422 wxCHECK_RET( m_window, wxT("GetSize() doesn't work without window") );
423
424 m_window->GetSize(width, height);
425 }
426
427 bool wxWindowDCImpl::DoFloodFill(wxCoord x, wxCoord y,
428 const wxColour& col, wxFloodFillStyle style)
429 {
430 #if wxUSE_IMAGE
431 extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
432 const wxColour & col, wxFloodFillStyle style);
433
434 return wxDoFloodFill( GetOwner(), x, y, col, style);
435 #else
436 wxUnusedVar(x);
437 wxUnusedVar(y);
438 wxUnusedVar(col);
439 wxUnusedVar(style);
440
441 return false;
442 #endif
443 }
444
445 bool wxWindowDCImpl::DoGetPixel( wxCoord x1, wxCoord y1, wxColour *col ) const
446 {
447 GdkImage* image = NULL;
448 if (m_gdkwindow)
449 {
450 const int x = LogicalToDeviceX(x1);
451 const int y = LogicalToDeviceY(y1);
452 wxRect rect;
453 gdk_drawable_get_size(m_gdkwindow, &rect.width, &rect.height);
454 if (rect.Contains(x, y))
455 image = gdk_drawable_get_image(m_gdkwindow, x, y, 1, 1);
456 }
457 if (image == NULL)
458 {
459 *col = wxColour();
460 return false;
461 }
462 GdkColormap* colormap = gdk_image_get_colormap(image);
463 const unsigned pixel = gdk_image_get_pixel(image, 0, 0);
464 if (colormap == NULL)
465 *col = pixel ? m_textForegroundColour : m_textBackgroundColour;
466 else
467 {
468 GdkColor c;
469 gdk_colormap_query_color(colormap, pixel, &c);
470 col->Set(c.red >> 8, c.green >> 8, c.blue >> 8);
471 }
472 g_object_unref(image);
473 return true;
474 }
475
476 void wxWindowDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
477 {
478 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
479
480 if (m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
481 {
482 if (m_gdkwindow)
483 gdk_draw_line( m_gdkwindow, m_penGC, XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
484
485 CalcBoundingBox(x1, y1);
486 CalcBoundingBox(x2, y2);
487 }
488 }
489
490 void wxWindowDCImpl::DoCrossHair( wxCoord x, wxCoord y )
491 {
492 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
493
494 if (m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
495 {
496 int w = 0;
497 int h = 0;
498 GetOwner()->GetSize( &w, &h );
499 wxCoord xx = XLOG2DEV(x);
500 wxCoord yy = YLOG2DEV(y);
501 if (m_gdkwindow)
502 {
503 gdk_draw_line( m_gdkwindow, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
504 gdk_draw_line( m_gdkwindow, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
505 }
506 }
507 }
508
509 void wxWindowDCImpl::DrawingSetup(GdkGC*& gc, bool& originChanged)
510 {
511 gc = m_brushGC;
512 GdkPixmap* pixmap = NULL;
513 const int style = m_brush.GetStyle();
514
515 if (style == wxBRUSHSTYLE_STIPPLE || style == wxBRUSHSTYLE_STIPPLE_MASK_OPAQUE)
516 {
517 const wxBitmap* stipple = m_brush.GetStipple();
518 if (stipple->IsOk())
519 {
520 if (style == wxBRUSHSTYLE_STIPPLE)
521 pixmap = stipple->GetPixmap();
522 else if (stipple->GetMask())
523 {
524 pixmap = stipple->GetPixmap();
525 gc = m_textGC;
526 }
527 }
528 }
529 else if (m_brush.IsHatch())
530 {
531 pixmap = GetHatch(style);
532 }
533
534 int origin_x = 0;
535 int origin_y = 0;
536 if (pixmap)
537 {
538 int w, h;
539 gdk_drawable_get_size(pixmap, &w, &h);
540 origin_x = m_deviceOriginX % w;
541 origin_y = m_deviceOriginY % h;
542 }
543
544 originChanged = origin_x || origin_y;
545 if (originChanged)
546 gdk_gc_set_ts_origin(gc, origin_x, origin_y);
547 }
548
549 void wxWindowDCImpl::DoDrawArc( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
550 wxCoord xc, wxCoord yc )
551 {
552 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
553
554 wxCoord xx1 = XLOG2DEV(x1);
555 wxCoord yy1 = YLOG2DEV(y1);
556 wxCoord xx2 = XLOG2DEV(x2);
557 wxCoord yy2 = YLOG2DEV(y2);
558 wxCoord xxc = XLOG2DEV(xc);
559 wxCoord yyc = YLOG2DEV(yc);
560 double dx = xx1 - xxc;
561 double dy = yy1 - yyc;
562 double radius = sqrt((double)(dx*dx+dy*dy));
563 wxCoord r = (wxCoord)radius;
564 double radius1, radius2;
565
566 if (xx1 == xx2 && yy1 == yy2)
567 {
568 radius1 = 0.0;
569 radius2 = 360.0;
570 }
571 else if ( wxIsNullDouble(radius) )
572 {
573 radius1 =
574 radius2 = 0.0;
575 }
576 else
577 {
578 radius1 = (xx1 - xxc == 0) ?
579 (yy1 - yyc < 0) ? 90.0 : -90.0 :
580 -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
581 radius2 = (xx2 - xxc == 0) ?
582 (yy2 - yyc < 0) ? 90.0 : -90.0 :
583 -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
584 }
585 wxCoord alpha1 = wxCoord(radius1 * 64.0);
586 wxCoord alpha2 = wxCoord((radius2 - radius1) * 64.0);
587 while (alpha2 <= 0) alpha2 += 360*64;
588 while (alpha1 > 360*64) alpha1 -= 360*64;
589
590 if (m_gdkwindow)
591 {
592 if (m_brush.GetStyle() != wxBRUSHSTYLE_TRANSPARENT)
593 {
594 GdkGC* gc;
595 bool originChanged;
596 DrawingSetup(gc, originChanged);
597
598 gdk_draw_arc(m_gdkwindow, gc, true, xxc-r, yyc-r, 2*r, 2*r, alpha1, alpha2);
599
600 if (originChanged)
601 gdk_gc_set_ts_origin(gc, 0, 0);
602 }
603
604 if (m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
605 {
606 gdk_draw_arc( m_gdkwindow, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
607
608 if ((m_brush.GetStyle() != wxBRUSHSTYLE_TRANSPARENT) && (alpha2 - alpha1 != 360*64))
609 {
610 gdk_draw_line( m_gdkwindow, m_penGC, xx1, yy1, xxc, yyc );
611 gdk_draw_line( m_gdkwindow, m_penGC, xxc, yyc, xx2, yy2 );
612 }
613 }
614 }
615
616 CalcBoundingBox (x1, y1);
617 CalcBoundingBox (x2, y2);
618 }
619
620 void wxWindowDCImpl::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double sa, double ea )
621 {
622 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
623
624 wxCoord xx = XLOG2DEV(x);
625 wxCoord yy = YLOG2DEV(y);
626 wxCoord ww = m_signX * XLOG2DEVREL(width);
627 wxCoord hh = m_signY * YLOG2DEVREL(height);
628
629 // CMB: handle -ve width and/or height
630 if (ww < 0) { ww = -ww; xx = xx - ww; }
631 if (hh < 0) { hh = -hh; yy = yy - hh; }
632
633 if (m_gdkwindow)
634 {
635 wxCoord start = wxCoord(sa * 64.0);
636 wxCoord end = wxCoord((ea-sa) * 64.0);
637
638 if (m_brush.GetStyle() != wxBRUSHSTYLE_TRANSPARENT)
639 {
640 GdkGC* gc;
641 bool originChanged;
642 DrawingSetup(gc, originChanged);
643
644 gdk_draw_arc(m_gdkwindow, gc, true, xx, yy, ww, hh, start, end);
645
646 if (originChanged)
647 gdk_gc_set_ts_origin(gc, 0, 0);
648 }
649
650 if (m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
651 gdk_draw_arc( m_gdkwindow, m_penGC, FALSE, xx, yy, ww, hh, start, end );
652 }
653
654 CalcBoundingBox (x, y);
655 CalcBoundingBox (x + width, y + height);
656 }
657
658 void wxWindowDCImpl::DoDrawPoint( wxCoord x, wxCoord y )
659 {
660 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
661
662 if ((m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT) && m_gdkwindow)
663 gdk_draw_point( m_gdkwindow, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
664
665 CalcBoundingBox (x, y);
666 }
667
668 void wxWindowDCImpl::DoDrawLines( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset )
669 {
670 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
671
672 if (m_pen.GetStyle() == wxPENSTYLE_TRANSPARENT) return;
673 if (n <= 0) return;
674
675 //Check, if scaling is necessary
676 const bool doScale =
677 xoffset != 0 || yoffset != 0 || XLOG2DEV(10) != 10 || YLOG2DEV(10) != 10;
678
679 // GdkPoint and wxPoint have the same memory layout, so we can cast one to the other
680 GdkPoint* gpts = reinterpret_cast<GdkPoint*>(points);
681
682 if (doScale)
683 gpts = new GdkPoint[n];
684
685 for (int i = 0; i < n; i++)
686 {
687 if (doScale)
688 {
689 gpts[i].x = XLOG2DEV(points[i].x + xoffset);
690 gpts[i].y = YLOG2DEV(points[i].y + yoffset);
691 }
692 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
693 }
694
695 if (m_gdkwindow)
696 gdk_draw_lines( m_gdkwindow, m_penGC, gpts, n);
697
698 if (doScale)
699 delete[] gpts;
700 }
701
702 void wxWindowDCImpl::DoDrawPolygon( int n, wxPoint points[],
703 wxCoord xoffset, wxCoord yoffset,
704 wxPolygonFillMode WXUNUSED(fillStyle) )
705 {
706 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
707
708 if (n <= 0) return;
709
710 //Check, if scaling is necessary
711 const bool doScale =
712 xoffset != 0 || yoffset != 0 || XLOG2DEV(10) != 10 || YLOG2DEV(10) != 10;
713
714 // GdkPoint and wxPoint have the same memory layout, so we can cast one to the other
715 GdkPoint* gdkpoints = reinterpret_cast<GdkPoint*>(points);
716
717 if (doScale)
718 gdkpoints = new GdkPoint[n];
719
720 int i;
721 for (i = 0 ; i < n ; i++)
722 {
723 if (doScale)
724 {
725 gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
726 gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
727 }
728 CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
729 }
730
731 if (m_gdkwindow)
732 {
733 if (m_brush.GetStyle() != wxBRUSHSTYLE_TRANSPARENT)
734 {
735 GdkGC* gc;
736 bool originChanged;
737 DrawingSetup(gc, originChanged);
738
739 gdk_draw_polygon(m_gdkwindow, gc, true, gdkpoints, n);
740
741 if (originChanged)
742 gdk_gc_set_ts_origin(gc, 0, 0);
743 }
744
745 if (m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
746 {
747 /*
748 for (i = 0 ; i < n ; i++)
749 {
750 gdk_draw_line( m_gdkwindow, m_penGC,
751 gdkpoints[i%n].x,
752 gdkpoints[i%n].y,
753 gdkpoints[(i+1)%n].x,
754 gdkpoints[(i+1)%n].y);
755 }
756 */
757 gdk_draw_polygon( m_gdkwindow, m_penGC, FALSE, gdkpoints, n );
758
759 }
760 }
761
762 if (doScale)
763 delete[] gdkpoints;
764 }
765
766 void wxWindowDCImpl::DoDrawRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
767 {
768 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
769
770 wxCoord xx = XLOG2DEV(x);
771 wxCoord yy = YLOG2DEV(y);
772 wxCoord ww = m_signX * XLOG2DEVREL(width);
773 wxCoord hh = m_signY * YLOG2DEVREL(height);
774
775 // CMB: draw nothing if transformed w or h is 0
776 if (ww == 0 || hh == 0) return;
777
778 // CMB: handle -ve width and/or height
779 if (ww < 0) { ww = -ww; xx = xx - ww; }
780 if (hh < 0) { hh = -hh; yy = yy - hh; }
781
782 if (m_gdkwindow)
783 {
784 if (m_brush.GetStyle() != wxBRUSHSTYLE_TRANSPARENT)
785 {
786 GdkGC* gc;
787 bool originChanged;
788 DrawingSetup(gc, originChanged);
789
790 gdk_draw_rectangle(m_gdkwindow, gc, true, xx, yy, ww, hh);
791
792 if (originChanged)
793 gdk_gc_set_ts_origin(gc, 0, 0);
794 }
795
796 if ( m_pen.IsOk() && m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT )
797 {
798 if ((m_pen.GetWidth() == 2) && (m_pen.GetCap() == wxCAP_ROUND) &&
799 (m_pen.GetJoin() == wxJOIN_ROUND) && (m_pen.GetStyle() == wxPENSTYLE_SOLID))
800 {
801 // Use 2 1-line rects instead
802 gdk_gc_set_line_attributes( m_penGC, 1, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND );
803
804 if (m_signX == -1)
805 {
806 // Different for RTL
807 gdk_draw_rectangle( m_gdkwindow, m_penGC, FALSE, xx+1, yy, ww-2, hh-2 );
808 gdk_draw_rectangle( m_gdkwindow, m_penGC, FALSE, xx, yy-1, ww, hh );
809 }
810 else
811 {
812 gdk_draw_rectangle( m_gdkwindow, m_penGC, FALSE, xx, yy, ww-2, hh-2 );
813 gdk_draw_rectangle( m_gdkwindow, m_penGC, FALSE, xx-1, yy-1, ww, hh );
814 }
815
816 // reset
817 gdk_gc_set_line_attributes( m_penGC, 2, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND );
818 }
819 else
820 {
821 // Just use X11 for other cases
822 gdk_draw_rectangle( m_gdkwindow, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
823 }
824 }
825 }
826
827 CalcBoundingBox( x, y );
828 CalcBoundingBox( x + width, y + height );
829 }
830
831 void wxWindowDCImpl::DoDrawRoundedRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
832 {
833 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
834
835 if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
836
837 wxCoord xx = XLOG2DEV(x);
838 wxCoord yy = YLOG2DEV(y);
839 wxCoord ww = m_signX * XLOG2DEVREL(width);
840 wxCoord hh = m_signY * YLOG2DEVREL(height);
841 wxCoord rr = XLOG2DEVREL((wxCoord)radius);
842
843 // CMB: handle -ve width and/or height
844 if (ww < 0) { ww = -ww; xx = xx - ww; }
845 if (hh < 0) { hh = -hh; yy = yy - hh; }
846
847 // CMB: if radius is zero use DrawRectangle() instead to avoid
848 // X drawing errors with small radii
849 if (rr == 0)
850 {
851 DoDrawRectangle( x, y, width, height );
852 return;
853 }
854
855 // CMB: draw nothing if transformed w or h is 0
856 if (ww == 0 || hh == 0) return;
857
858 // CMB: adjust size if outline is drawn otherwise the result is
859 // 1 pixel too wide and high
860 if (m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
861 {
862 ww--;
863 hh--;
864 }
865
866 if (m_gdkwindow)
867 {
868 // CMB: ensure dd is not larger than rectangle otherwise we
869 // get an hour glass shape
870 wxCoord dd = 2 * rr;
871 if (dd > ww) dd = ww;
872 if (dd > hh) dd = hh;
873 rr = dd / 2;
874
875 if (m_brush.GetStyle() != wxBRUSHSTYLE_TRANSPARENT)
876 {
877 GdkGC* gc;
878 bool originChanged;
879 DrawingSetup(gc, originChanged);
880
881 gdk_draw_rectangle(m_gdkwindow, gc, true, xx+rr, yy, ww-dd+1, hh);
882 gdk_draw_rectangle(m_gdkwindow, gc, true, xx, yy+rr, ww, hh-dd+1);
883 gdk_draw_arc(m_gdkwindow, gc, true, xx, yy, dd, dd, 90*64, 90*64);
884 gdk_draw_arc(m_gdkwindow, gc, true, xx+ww-dd, yy, dd, dd, 0, 90*64);
885 gdk_draw_arc(m_gdkwindow, gc, true, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64);
886 gdk_draw_arc(m_gdkwindow, gc, true, xx, yy+hh-dd, dd, dd, 180*64, 90*64);
887
888 if (originChanged)
889 gdk_gc_set_ts_origin(gc, 0, 0);
890 }
891
892 if (m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
893 {
894 gdk_draw_line( m_gdkwindow, m_penGC, xx+rr+1, yy, xx+ww-rr, yy );
895 gdk_draw_line( m_gdkwindow, m_penGC, xx+rr+1, yy+hh, xx+ww-rr, yy+hh );
896 gdk_draw_line( m_gdkwindow, m_penGC, xx, yy+rr+1, xx, yy+hh-rr );
897 gdk_draw_line( m_gdkwindow, m_penGC, xx+ww, yy+rr+1, xx+ww, yy+hh-rr );
898 gdk_draw_arc( m_gdkwindow, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
899 gdk_draw_arc( m_gdkwindow, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
900 gdk_draw_arc( m_gdkwindow, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
901 gdk_draw_arc( m_gdkwindow, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
902 }
903 }
904
905 // this ignores the radius
906 CalcBoundingBox( x, y );
907 CalcBoundingBox( x + width, y + height );
908 }
909
910 void wxWindowDCImpl::DoDrawEllipse( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
911 {
912 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
913
914 wxCoord xx = XLOG2DEV(x);
915 wxCoord yy = YLOG2DEV(y);
916 wxCoord ww = m_signX * XLOG2DEVREL(width);
917 wxCoord hh = m_signY * YLOG2DEVREL(height);
918
919 // CMB: handle -ve width and/or height
920 if (ww < 0) { ww = -ww; xx = xx - ww; }
921 if (hh < 0) { hh = -hh; yy = yy - hh; }
922
923 if (m_gdkwindow)
924 {
925 if (m_brush.GetStyle() != wxBRUSHSTYLE_TRANSPARENT)
926 {
927 GdkGC* gc;
928 bool originChanged;
929 DrawingSetup(gc, originChanged);
930
931 // If the pen is transparent pen we increase the size
932 // for better compatibility with other platforms.
933 if (m_pen.GetStyle() == wxPENSTYLE_TRANSPARENT)
934 {
935 ++ww;
936 ++hh;
937 }
938
939 gdk_draw_arc(m_gdkwindow, gc, true, xx, yy, ww, hh, 0, 360*64);
940
941 if (originChanged)
942 gdk_gc_set_ts_origin(gc, 0, 0);
943 }
944
945 if (m_pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
946 gdk_draw_arc( m_gdkwindow, m_penGC, false, xx, yy, ww, hh, 0, 360*64 );
947 }
948
949 CalcBoundingBox( x, y );
950 CalcBoundingBox( x + width, y + height );
951 }
952
953 void wxWindowDCImpl::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
954 {
955 // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
956 DoDrawBitmap( (const wxBitmap&)icon, x, y, true );
957 }
958
959 // scale a pixbuf, return new pixbuf, unref old one
960 static GdkPixbuf*
961 Scale(GdkPixbuf* pixbuf, int dst_w, int dst_h, double sx, double sy)
962 {
963 GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
964 GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, dst_w, dst_h);
965 gdk_pixbuf_scale(pixbuf, pixbuf_scaled,
966 0, 0, dst_w, dst_h, 0, 0, sx, sy, GDK_INTERP_NEAREST);
967 g_object_unref(pixbuf);
968 return pixbuf_scaled;
969 }
970
971 // scale part of a pixmap using pixbuf scaling, return pixbuf
972 static GdkPixbuf*
973 Scale(GdkPixmap* pixmap, int x, int y, int w, int h, int dst_w, int dst_h, double sx, double sy)
974 {
975 GdkPixbuf* pixbuf = gdk_pixbuf_get_from_drawable(
976 NULL, pixmap, NULL, x, y, 0, 0, w, h);
977 return Scale(pixbuf, dst_w, dst_h, sx, sy);
978 }
979
980 // scale part of a mask pixmap, return new mask, unref old one
981 static GdkPixmap*
982 ScaleMask(GdkPixmap* mask, int x, int y, int w, int h, int dst_w, int dst_h, double sx, double sy)
983 {
984 GdkPixbuf* pixbuf = Scale(mask, x, y, w, h, dst_w, dst_h, sx, sy);
985
986 // convert black and white pixbuf back to a mono pixmap
987 const unsigned out_rowstride = (dst_w + 7) / 8;
988 const size_t data_size = out_rowstride * size_t(dst_h);
989 char* data = new char[data_size];
990 char* out = data;
991 const guchar* row = gdk_pixbuf_get_pixels(pixbuf);
992 const int rowstride = gdk_pixbuf_get_rowstride(pixbuf);
993 memset(data, 0, data_size);
994 for (int j = 0; j < dst_h; j++, row += rowstride, out += out_rowstride)
995 {
996 const guchar* in = row;
997 for (int i = 0; i < dst_w; i++, in += 3)
998 if (*in)
999 out[i >> 3] |= 1 << (i & 7);
1000 }
1001 g_object_unref(pixbuf);
1002 GdkPixmap* pixmap = gdk_bitmap_create_from_data(mask, data, dst_w, dst_h);
1003 delete[] data;
1004 g_object_unref(mask);
1005 return pixmap;
1006 }
1007
1008 // Make a new mask from part of a mask and a clip region.
1009 // Return new mask, unref old one.
1010 static GdkPixmap*
1011 ClipMask(GdkPixmap* mask, GdkRegion* clipRegion, int x, int y, int dst_x, int dst_y, int w, int h)
1012 {
1013 GdkGCValues gcValues;
1014 gcValues.foreground.pixel = 0;
1015 GdkGC* gc = gdk_gc_new_with_values(mask, &gcValues, GDK_GC_FOREGROUND);
1016 GdkPixmap* pixmap = gdk_pixmap_new(mask, w, h, 1);
1017 // clear new mask, so clipped areas will be masked
1018 gdk_draw_rectangle(pixmap, gc, true, 0, 0, w, h);
1019 gdk_gc_set_clip_region(gc, clipRegion);
1020 gdk_gc_set_clip_origin(gc, -dst_x, -dst_y);
1021 // draw old mask onto new one, with clip
1022 gdk_draw_drawable(pixmap, gc, mask, x, y, 0, 0, w, h);
1023 g_object_unref(gc);
1024 g_object_unref(mask);
1025 return pixmap;
1026 }
1027
1028 // make a color pixmap from part of a mono one, using text fg/bg colors
1029 GdkPixmap*
1030 wxWindowDCImpl::MonoToColor(GdkPixmap* monoPixmap, int x, int y, int w, int h) const
1031 {
1032 GdkPixmap* pixmap = gdk_pixmap_new(m_gdkwindow, w, h, -1);
1033 GdkGCValues gcValues;
1034 gcValues.foreground.pixel = m_textForegroundColour.GetColor()->pixel;
1035 gcValues.background.pixel = m_textBackgroundColour.GetColor()->pixel;
1036 gcValues.stipple = monoPixmap;
1037 gcValues.fill = GDK_OPAQUE_STIPPLED;
1038 gcValues.ts_x_origin = -x;
1039 gcValues.ts_y_origin = -y;
1040 GdkGC* gc = gdk_gc_new_with_values(pixmap, &gcValues, GdkGCValuesMask(
1041 GDK_GC_FOREGROUND | GDK_GC_BACKGROUND | GDK_GC_STIPPLE | GDK_GC_FILL |
1042 GDK_GC_TS_X_ORIGIN | GDK_GC_TS_Y_ORIGIN));
1043 gdk_draw_rectangle(pixmap, gc, true, 0, 0, w, h);
1044 g_object_unref(gc);
1045 return pixmap;
1046 }
1047
1048 void wxWindowDCImpl::DoDrawBitmap( const wxBitmap &bitmap,
1049 wxCoord x, wxCoord y,
1050 bool useMask )
1051 {
1052 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
1053 wxCHECK_RET( bitmap.IsOk(), wxT("invalid bitmap") );
1054
1055 if (!m_gdkwindow) return;
1056
1057 const int w = bitmap.GetWidth();
1058 const int h = bitmap.GetHeight();
1059
1060 // notice that as the bitmap is not drawn upside down (or right to left)
1061 // even if the corresponding axis direction is inversed, we need to take it
1062 // into account when calculating its bounding box
1063 CalcBoundingBox(x, y);
1064 CalcBoundingBox(x + m_signX*w, y + m_signY*h);
1065
1066 // device coords
1067 int xx = LogicalToDeviceX(x);
1068 const int yy = LogicalToDeviceY(y);
1069 const int ww = LogicalToDeviceXRel(w);
1070 const int hh = LogicalToDeviceYRel(h);
1071
1072 if (m_window && m_window->GetLayoutDirection() == wxLayout_RightToLeft)
1073 xx -= ww;
1074
1075 GdkRegion* const clipRegion = m_currentClippingRegion.GetRegion();
1076 // determine clip region overlap
1077 int overlap = wxInRegion;
1078 if (clipRegion)
1079 {
1080 overlap = m_currentClippingRegion.Contains(xx, yy, ww, hh);
1081 if (overlap == wxOutRegion)
1082 return;
1083 }
1084
1085 const bool isScaled = ww != w || hh != h;
1086 const bool hasAlpha = bitmap.HasAlpha();
1087 GdkGC* const use_gc = m_penGC;
1088
1089 GdkPixmap* mask = NULL;
1090 // mask does not work when drawing a pixbuf with alpha
1091 if (useMask && !hasAlpha)
1092 {
1093 wxMask* m = bitmap.GetMask();
1094 if (m)
1095 mask = m->GetBitmap();
1096 }
1097 if (mask)
1098 {
1099 g_object_ref(mask);
1100 if (isScaled)
1101 mask = ScaleMask(mask, 0, 0, w, h, ww, hh, m_scaleX, m_scaleY);
1102 if (overlap == wxPartRegion)
1103 {
1104 // need a new mask that also masks the clipped area,
1105 // because gc can't have both a mask and a clip region
1106 mask = ClipMask(mask, clipRegion, 0, 0, xx, yy, ww, hh);
1107 }
1108 gdk_gc_set_clip_mask(use_gc, mask);
1109 gdk_gc_set_clip_origin(use_gc, xx, yy);
1110 }
1111
1112 // determine whether to use pixmap or pixbuf
1113 GdkPixmap* pixmap = NULL;
1114 GdkPixbuf* pixbuf = NULL;
1115 if (bitmap.HasPixmap())
1116 pixmap = bitmap.GetPixmap();
1117 if (pixmap && gdk_drawable_get_depth(pixmap) == 1)
1118 {
1119 // convert mono pixmap to color using text fg/bg colors
1120 pixmap = MonoToColor(pixmap, 0, 0, w, h);
1121 }
1122 else if (hasAlpha || pixmap == NULL)
1123 {
1124 pixmap = NULL;
1125 pixbuf = bitmap.GetPixbuf();
1126 g_object_ref(pixbuf);
1127 }
1128 else
1129 {
1130 g_object_ref(pixmap);
1131 }
1132
1133 if (isScaled)
1134 {
1135 if (pixbuf)
1136 pixbuf = Scale(pixbuf, ww, hh, m_scaleX, m_scaleY);
1137 else
1138 pixbuf = Scale(pixmap, 0, 0, w, h, ww, hh, m_scaleX, m_scaleY);
1139 }
1140
1141 if (pixbuf)
1142 {
1143 gdk_draw_pixbuf(m_gdkwindow, use_gc, pixbuf,
1144 0, 0, xx, yy, ww, hh, GDK_RGB_DITHER_NORMAL, 0, 0);
1145 g_object_unref(pixbuf);
1146 }
1147 else
1148 {
1149 gdk_draw_drawable(m_gdkwindow, use_gc, pixmap, 0, 0, xx, yy, ww, hh);
1150 }
1151
1152 if (pixmap)
1153 g_object_unref(pixmap);
1154 if (mask)
1155 {
1156 g_object_unref(mask);
1157 gdk_gc_set_clip_region(use_gc, clipRegion);
1158 }
1159 }
1160
1161 bool wxWindowDCImpl::DoBlit( wxCoord xdest, wxCoord ydest,
1162 wxCoord width, wxCoord height,
1163 wxDC *source,
1164 wxCoord xsrc, wxCoord ysrc,
1165 wxRasterOperationMode logical_func,
1166 bool useMask,
1167 wxCoord xsrcMask, wxCoord ysrcMask )
1168 {
1169 wxCHECK_MSG( IsOk(), false, wxT("invalid window dc") );
1170 wxCHECK_MSG( source, false, wxT("invalid source dc") );
1171
1172 if (!m_gdkwindow) return false;
1173
1174 GdkDrawable* srcDrawable = NULL;
1175 GdkPixmap* mask = NULL;
1176 wxMemoryDC* memDC = wxDynamicCast(source, wxMemoryDC);
1177 if (memDC)
1178 {
1179 const wxBitmap& bitmap = memDC->GetSelectedBitmap();
1180 if (!bitmap.IsOk())
1181 return false;
1182 srcDrawable = bitmap.GetPixmap();
1183 if (useMask)
1184 {
1185 wxMask* m = bitmap.GetMask();
1186 if (m)
1187 mask = m->GetBitmap();
1188 }
1189 }
1190 else
1191 {
1192 wxDCImpl* impl = source->GetImpl();
1193 wxWindowDCImpl* gtk_impl = wxDynamicCast(impl, wxWindowDCImpl);
1194 if (gtk_impl)
1195 srcDrawable = gtk_impl->GetGDKWindow();
1196 if (srcDrawable == NULL)
1197 return false;
1198 }
1199
1200 CalcBoundingBox(xdest, ydest);
1201 CalcBoundingBox(xdest + width, ydest + height);
1202
1203 // source device coords
1204 int src_x = source->LogicalToDeviceX(xsrc);
1205 int src_y = source->LogicalToDeviceY(ysrc);
1206 int src_w = source->LogicalToDeviceXRel(width);
1207 int src_h = source->LogicalToDeviceYRel(height);
1208
1209 // Clip source rect to source dc.
1210 // Only necessary when scaling, to avoid GDK errors when
1211 // converting to pixbuf, but no harm in always doing it.
1212 // If source rect changes, it also changes the dest rect.
1213 wxRect clip;
1214 gdk_drawable_get_size(srcDrawable, &clip.width, &clip.height);
1215 clip.Intersect(wxRect(src_x, src_y, src_w, src_h));
1216 if (src_w != clip.width || src_h != clip.height)
1217 {
1218 if (clip.width == 0)
1219 return true;
1220
1221 src_w = clip.width;
1222 src_h = clip.height;
1223 width = source->DeviceToLogicalXRel(src_w);
1224 height = source->DeviceToLogicalYRel(src_h);
1225 if (src_x != clip.x || src_y != clip.y)
1226 {
1227 xdest += source->DeviceToLogicalXRel(clip.x - src_x);
1228 ydest += source->DeviceToLogicalYRel(clip.y - src_y);
1229 src_x = clip.x;
1230 src_y = clip.y;
1231 }
1232 }
1233
1234 // destination device coords
1235 const int dst_x = LogicalToDeviceX(xdest);
1236 const int dst_y = LogicalToDeviceY(ydest);
1237 const int dst_w = LogicalToDeviceXRel(width);
1238 const int dst_h = LogicalToDeviceYRel(height);
1239
1240 GdkRegion* const clipRegion = m_currentClippingRegion.GetRegion();
1241 // determine dest clip region overlap
1242 int overlap = wxInRegion;
1243 if (clipRegion)
1244 {
1245 overlap = m_currentClippingRegion.Contains(dst_x, dst_y, dst_w, dst_h);
1246 if (overlap == wxOutRegion)
1247 return true;
1248 }
1249
1250 const bool isScaled = src_w != dst_w || src_h != dst_h;
1251 double scale_x = 0;
1252 double scale_y = 0;
1253 if (isScaled)
1254 {
1255 // get source to dest scale
1256 double usx, usy, lsx, lsy;
1257 source->GetUserScale(&usx, &usy);
1258 source->GetLogicalScale(&lsx, &lsy);
1259 scale_x = m_scaleX / (usx * lsx);
1260 scale_y = m_scaleY / (usy * lsy);
1261 }
1262
1263 GdkGC* const use_gc = m_penGC;
1264
1265 if (mask)
1266 {
1267 g_object_ref(mask);
1268 int srcMask_x = src_x;
1269 int srcMask_y = src_y;
1270 if (xsrcMask != -1 || ysrcMask != -1)
1271 {
1272 srcMask_x = source->LogicalToDeviceX(xsrcMask);
1273 srcMask_y = source->LogicalToDeviceY(ysrcMask);
1274 }
1275 if (isScaled)
1276 {
1277 mask = ScaleMask(mask, srcMask_x, srcMask_y,
1278 src_w, src_h, dst_w, dst_h, scale_x, scale_y);
1279 srcMask_x = 0;
1280 srcMask_y = 0;
1281 }
1282 if (overlap == wxPartRegion)
1283 {
1284 // need a new mask that also masks the clipped area,
1285 // because gc can't have both a mask and a clip region
1286 mask = ClipMask(mask, clipRegion,
1287 srcMask_x, srcMask_y, dst_x, dst_y, dst_w, dst_h);
1288 srcMask_x = 0;
1289 srcMask_y = 0;
1290 }
1291 gdk_gc_set_clip_mask(use_gc, mask);
1292 gdk_gc_set_clip_origin(use_gc, dst_x - srcMask_x, dst_y - srcMask_y);
1293 }
1294
1295 GdkPixmap* pixmap = NULL;
1296 if (gdk_drawable_get_depth(srcDrawable) == 1)
1297 {
1298 // Convert mono pixmap to color using text fg/bg colors.
1299 // Scaling/drawing is simpler if this is done first.
1300 pixmap = MonoToColor(srcDrawable, src_x, src_y, src_w, src_h);
1301 srcDrawable = pixmap;
1302 src_x = 0;
1303 src_y = 0;
1304 }
1305
1306 const wxRasterOperationMode logical_func_save = m_logicalFunction;
1307 SetLogicalFunction(logical_func);
1308 if (memDC == NULL)
1309 gdk_gc_set_subwindow(use_gc, GDK_INCLUDE_INFERIORS);
1310
1311 if (isScaled)
1312 {
1313 GdkPixbuf* pixbuf = Scale(srcDrawable,
1314 src_x, src_y, src_w, src_h, dst_w, dst_h, scale_x, scale_y);
1315 gdk_draw_pixbuf(m_gdkwindow, use_gc, pixbuf,
1316 0, 0, dst_x, dst_y, dst_w, dst_h, GDK_RGB_DITHER_NONE, 0, 0);
1317 g_object_unref(pixbuf);
1318 }
1319 else
1320 {
1321 gdk_draw_drawable(m_gdkwindow, use_gc, srcDrawable,
1322 src_x, src_y, dst_x, dst_y, dst_w, dst_h);
1323 }
1324
1325 SetLogicalFunction(logical_func_save);
1326 if (memDC == NULL)
1327 gdk_gc_set_subwindow(use_gc, GDK_CLIP_BY_CHILDREN);
1328
1329 if (pixmap)
1330 g_object_unref(pixmap);
1331 if (mask)
1332 {
1333 g_object_unref(mask);
1334 gdk_gc_set_clip_region(use_gc, clipRegion);
1335 }
1336 return true;
1337 }
1338
1339 void wxWindowDCImpl::DoDrawText(const wxString& text,
1340 wxCoord xLogical,
1341 wxCoord yLogical)
1342 {
1343 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
1344
1345 if (!m_gdkwindow) return;
1346
1347 if (text.empty()) return;
1348
1349 wxCoord x = XLOG2DEV(xLogical),
1350 y = YLOG2DEV(yLogical);
1351
1352 wxCHECK_RET( m_context, wxT("no Pango context") );
1353 wxCHECK_RET( m_layout, wxT("no Pango layout") );
1354 wxCHECK_RET( m_fontdesc, wxT("no Pango font description") );
1355
1356 gdk_pango_context_set_colormap( m_context, m_cmap ); // not needed in gtk+ >= 2.6
1357
1358 bool underlined = m_font.IsOk() && m_font.GetUnderlined();
1359
1360 wxCharBuffer data = wxGTK_CONV(text);
1361 if ( !data )
1362 return;
1363 size_t datalen = strlen(data);
1364
1365 // in Pango >= 1.16 the "underline of leading/trailing spaces" bug
1366 // has been fixed and thus the hack implemented below should never be used
1367 static bool pangoOk = !wx_pango_version_check(1, 16, 0);
1368
1369 bool needshack = underlined && !pangoOk;
1370
1371 if (needshack)
1372 {
1373 // a PangoLayout which has leading/trailing spaces with underlined font
1374 // is not correctly drawn by this pango version: Pango won't underline the spaces.
1375 // This can be a problem; e.g. wxHTML rendering of underlined text relies on
1376 // this behaviour. To workaround this problem, we use a special hack here
1377 // suggested by pango maintainer Behdad Esfahbod: we prepend and append two
1378 // empty space characters and give them a dummy colour attribute.
1379 // This will force Pango to underline the leading/trailing spaces, too.
1380
1381 wxCharBuffer data_tmp(datalen + 6);
1382 // copy the leading U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
1383 memcpy(data_tmp.data(), "\342\200\214", 3);
1384 // copy the user string
1385 memcpy(data_tmp.data() + 3, data, datalen);
1386 // copy the trailing U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
1387 memcpy(data_tmp.data() + 3 + datalen, "\342\200\214", 3);
1388
1389 data = data_tmp;
1390 datalen += 6;
1391 }
1392
1393 pango_layout_set_text(m_layout, data, datalen);
1394
1395 if (underlined)
1396 {
1397 PangoAttrList *attrs = pango_attr_list_new();
1398 PangoAttribute *a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1399 a->start_index = 0;
1400 a->end_index = datalen;
1401 pango_attr_list_insert(attrs, a);
1402
1403 if (needshack)
1404 {
1405 // dummy colour for the leading space
1406 a = pango_attr_foreground_new (0x0057, 0x52A9, 0xD614);
1407 a->start_index = 0;
1408 a->end_index = 1;
1409 pango_attr_list_insert(attrs, a);
1410
1411 // dummy colour for the trailing space
1412 a = pango_attr_foreground_new (0x0057, 0x52A9, 0xD614);
1413 a->start_index = datalen - 1;
1414 a->end_index = datalen;
1415 pango_attr_list_insert(attrs, a);
1416 }
1417
1418 pango_layout_set_attributes(m_layout, attrs);
1419 pango_attr_list_unref(attrs);
1420 }
1421
1422 int oldSize = 0;
1423 const bool isScaled = fabs(m_scaleY - 1.0) > 0.00001;
1424 if (isScaled)
1425 {
1426 // If there is a user or actually any scale applied to
1427 // the device context, scale the font.
1428
1429 // scale font description
1430 oldSize = pango_font_description_get_size(m_fontdesc);
1431 pango_font_description_set_size(m_fontdesc, int(oldSize * m_scaleY));
1432
1433 // actually apply scaled font
1434 pango_layout_set_font_description( m_layout, m_fontdesc );
1435 }
1436
1437 int w, h;
1438 pango_layout_get_pixel_size(m_layout, &w, &h);
1439
1440 // Draw layout.
1441 int x_rtl = x;
1442 if (m_window && m_window->GetLayoutDirection() == wxLayout_RightToLeft)
1443 x_rtl -= w;
1444
1445 const GdkColor* bg_col = NULL;
1446 if (m_backgroundMode == wxBRUSHSTYLE_SOLID)
1447 bg_col = m_textBackgroundColour.GetColor();
1448
1449 gdk_draw_layout_with_colors(m_gdkwindow, m_textGC, x_rtl, y, m_layout, NULL, bg_col);
1450
1451 if (isScaled)
1452 {
1453 // reset unscaled size
1454 pango_font_description_set_size( m_fontdesc, oldSize );
1455
1456 // actually apply unscaled font
1457 pango_layout_set_font_description( m_layout, m_fontdesc );
1458 }
1459 if (underlined)
1460 {
1461 // undo underline attributes setting:
1462 pango_layout_set_attributes(m_layout, NULL);
1463 }
1464
1465 CalcBoundingBox(xLogical + int(w / m_scaleX), yLogical + int(h / m_scaleY));
1466 CalcBoundingBox(xLogical, yLogical);
1467 }
1468
1469 // TODO: When GTK2.6 is required, merge DoDrawText and DoDrawRotatedText to
1470 // avoid code duplication
1471 void wxWindowDCImpl::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y, double angle )
1472 {
1473 if (!m_gdkwindow || text.empty())
1474 return;
1475
1476 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
1477
1478 #if __WXGTK26__
1479 if (!gtk_check_version(2,6,0))
1480 {
1481 x = XLOG2DEV(x);
1482 y = YLOG2DEV(y);
1483
1484 pango_layout_set_text(m_layout, wxGTK_CONV(text), -1);
1485
1486 if (m_font.GetUnderlined())
1487 {
1488 PangoAttrList *attrs = pango_attr_list_new();
1489 PangoAttribute *a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1490 pango_attr_list_insert(attrs, a);
1491 pango_layout_set_attributes(m_layout, attrs);
1492 pango_attr_list_unref(attrs);
1493 }
1494
1495 int oldSize = 0;
1496 const bool isScaled = fabs(m_scaleY - 1.0) > 0.00001;
1497 if (isScaled)
1498 {
1499 //TODO: when Pango >= 1.6 is required, use pango_matrix_scale()
1500 // If there is a user or actually any scale applied to
1501 // the device context, scale the font.
1502
1503 // scale font description
1504 oldSize = pango_font_description_get_size(m_fontdesc);
1505 pango_font_description_set_size(m_fontdesc, int(oldSize * m_scaleY));
1506
1507 // actually apply scaled font
1508 pango_layout_set_font_description( m_layout, m_fontdesc );
1509 }
1510
1511 int w, h;
1512 pango_layout_get_pixel_size(m_layout, &w, &h);
1513
1514 const GdkColor* bg_col = NULL;
1515 if (m_backgroundMode == wxBRUSHSTYLE_SOLID)
1516 bg_col = m_textBackgroundColour.GetColor();
1517
1518 // rotate the text
1519 PangoMatrix matrix = PANGO_MATRIX_INIT;
1520 pango_matrix_rotate (&matrix, angle);
1521 pango_context_set_matrix (m_context, &matrix);
1522 pango_layout_context_changed (m_layout);
1523
1524 // To be compatible with MSW, the rotation axis must be in the old
1525 // top-left corner.
1526 // Calculate the vertices of the rotated rectangle containing the text,
1527 // relative to the old top-left vertex.
1528 // We could use the matrix for this, but it's simpler with trignonometry.
1529 double rad = DegToRad(angle);
1530 // the rectangle vertices are counted clockwise with the first one
1531 // being at (0, 0)
1532 double x2 = w * cos(rad);
1533 double y2 = -w * sin(rad); // y axis points to the bottom, hence minus
1534 double x4 = h * sin(rad);
1535 double y4 = h * cos(rad);
1536 double x3 = x4 + x2;
1537 double y3 = y4 + y2;
1538 // Then we calculate max and min of the rotated rectangle.
1539 wxCoord maxX = (wxCoord)(dmax(dmax(0, x2), dmax(x3, x4)) + 0.5),
1540 maxY = (wxCoord)(dmax(dmax(0, y2), dmax(y3, y4)) + 0.5),
1541 minX = (wxCoord)(dmin(dmin(0, x2), dmin(x3, x4)) - 0.5),
1542 minY = (wxCoord)(dmin(dmin(0, y2), dmin(y3, y4)) - 0.5);
1543
1544 gdk_draw_layout_with_colors(m_gdkwindow, m_textGC, x+minX, y+minY,
1545 m_layout, NULL, bg_col);
1546
1547 if (m_font.GetUnderlined())
1548 pango_layout_set_attributes(m_layout, NULL);
1549
1550 // clean up the transformation matrix
1551 pango_context_set_matrix(m_context, NULL);
1552
1553 if (isScaled)
1554 {
1555 // reset unscaled size
1556 pango_font_description_set_size( m_fontdesc, oldSize );
1557
1558 // actually apply unscaled font
1559 pango_layout_set_font_description( m_layout, m_fontdesc );
1560 }
1561
1562 CalcBoundingBox(x+minX, y+minY);
1563 CalcBoundingBox(x+maxX, y+maxY);
1564 }
1565 else
1566 #endif //__WXGTK26__
1567 {
1568 #if wxUSE_IMAGE
1569 if ( wxIsNullDouble(angle) )
1570 {
1571 DoDrawText(text, x, y);
1572 return;
1573 }
1574
1575 wxCoord w;
1576 wxCoord h;
1577
1578 // TODO: implement later without GdkFont for GTK 2.0
1579 DoGetTextExtent(text, &w, &h, NULL,NULL, &m_font);
1580
1581 // draw the string normally
1582 wxBitmap src(w, h);
1583 wxMemoryDC dc;
1584 dc.SelectObject(src);
1585 dc.SetFont(GetFont());
1586 dc.SetBackground(*wxBLACK_BRUSH);
1587 dc.SetBrush(*wxBLACK_BRUSH);
1588 dc.Clear();
1589 dc.SetTextForeground( *wxWHITE );
1590 dc.DrawText(text, 0, 0);
1591 dc.SelectObject(wxNullBitmap);
1592
1593 // Calculate the size of the rotated bounding box.
1594 double rad = DegToRad(angle);
1595 double dx = cos(rad),
1596 dy = sin(rad);
1597
1598 // the rectngle vertices are counted clockwise with the first one being at
1599 // (0, 0) (or, rather, at (x, y))
1600 double x2 = w*dx,
1601 y2 = -w*dy; // y axis points to the bottom, hence minus
1602 double x4 = h*dy,
1603 y4 = h*dx;
1604 double x3 = x4 + x2,
1605 y3 = y4 + y2;
1606
1607 // calc max and min
1608 wxCoord maxX = (wxCoord)(dmax(x2, dmax(x3, x4)) + 0.5),
1609 maxY = (wxCoord)(dmax(y2, dmax(y3, y4)) + 0.5),
1610 minX = (wxCoord)(dmin(x2, dmin(x3, x4)) - 0.5),
1611 minY = (wxCoord)(dmin(y2, dmin(y3, y4)) - 0.5);
1612
1613
1614 wxImage image = src.ConvertToImage();
1615
1616 image.ConvertColourToAlpha( m_textForegroundColour.Red(),
1617 m_textForegroundColour.Green(),
1618 m_textForegroundColour.Blue() );
1619 image = image.Rotate( rad, wxPoint(0,0) );
1620
1621 int i_angle = (int) angle;
1622 i_angle = i_angle % 360;
1623 if (i_angle < 0)
1624 i_angle += 360;
1625 int xoffset = 0;
1626 if ((i_angle >= 90.0) && (i_angle < 270.0))
1627 xoffset = image.GetWidth();
1628 int yoffset = 0;
1629 if ((i_angle >= 0.0) && (i_angle < 180.0))
1630 yoffset = image.GetHeight();
1631
1632 if ((i_angle >= 0) && (i_angle < 90))
1633 yoffset -= (int)( cos(rad)*h );
1634 if ((i_angle >= 90) && (i_angle < 180))
1635 xoffset -= (int)( sin(rad)*h );
1636 if ((i_angle >= 180) && (i_angle < 270))
1637 yoffset -= (int)( cos(rad)*h );
1638 if ((i_angle >= 270) && (i_angle < 360))
1639 xoffset -= (int)( sin(rad)*h );
1640
1641 int i_x = x - xoffset;
1642 int i_y = y - yoffset;
1643
1644 src = image;
1645 DoDrawBitmap( src, i_x, i_y, true );
1646
1647
1648 // it would be better to draw with non underlined font and draw the line
1649 // manually here (it would be more straight...)
1650 #if 0
1651 if ( m_font.GetUnderlined() )
1652 {
1653 gdk_draw_line( m_gdkwindow, m_textGC,
1654 XLOG2DEV(x + x4), YLOG2DEV(y + y4 + font->descent),
1655 XLOG2DEV(x + x3), YLOG2DEV(y + y3 + font->descent));
1656 }
1657 #endif // 0
1658
1659 // update the bounding box
1660 CalcBoundingBox(x + minX, y + minY);
1661 CalcBoundingBox(x + maxX, y + maxY);
1662 #else // !wxUSE_IMAGE
1663 wxUnusedVar(text);
1664 wxUnusedVar(x);
1665 wxUnusedVar(y);
1666 wxUnusedVar(angle);
1667 #endif // wxUSE_IMAGE/!wxUSE_IMAGE
1668 }
1669 }
1670
1671 void wxWindowDCImpl::DoGetTextExtent(const wxString &string,
1672 wxCoord *width, wxCoord *height,
1673 wxCoord *descent, wxCoord *externalLeading,
1674 const wxFont *theFont) const
1675 {
1676 if ( width )
1677 *width = 0;
1678 if ( height )
1679 *height = 0;
1680 if ( descent )
1681 *descent = 0;
1682 if ( externalLeading )
1683 *externalLeading = 0;
1684
1685 if (string.empty())
1686 return;
1687
1688 // ensure that theFont is always non-NULL
1689 if ( !theFont || !theFont->IsOk() )
1690 theFont = &m_font;
1691
1692 // and use it if it's valid
1693 if ( theFont->IsOk() )
1694 {
1695 pango_layout_set_font_description
1696 (
1697 m_layout,
1698 theFont->GetNativeFontInfo()->description
1699 );
1700 }
1701
1702 // Set layout's text
1703 const wxCharBuffer dataUTF8 = wxGTK_CONV_FONT(string, *theFont);
1704 if ( !dataUTF8 )
1705 {
1706 // hardly ideal, but what else can we do if conversion failed?
1707 return;
1708 }
1709
1710 pango_layout_set_text(m_layout, dataUTF8, -1);
1711
1712 int h;
1713 pango_layout_get_pixel_size(m_layout, width, &h);
1714 if (descent)
1715 {
1716 PangoLayoutIter *iter = pango_layout_get_iter(m_layout);
1717 int baseline = pango_layout_iter_get_baseline(iter);
1718 pango_layout_iter_free(iter);
1719 *descent = h - PANGO_PIXELS(baseline);
1720 }
1721 if (height)
1722 *height = h;
1723
1724 // Reset old font description
1725 if (theFont->IsOk())
1726 pango_layout_set_font_description( m_layout, m_fontdesc );
1727 }
1728
1729
1730 bool wxWindowDCImpl::DoGetPartialTextExtents(const wxString& text,
1731 wxArrayInt& widths) const
1732 {
1733 const size_t len = text.length();
1734 widths.Empty();
1735 widths.Add(0, len);
1736
1737 if (text.empty())
1738 return true;
1739
1740 // Set layout's text
1741 const wxCharBuffer dataUTF8 = wxGTK_CONV_FONT(text, m_font);
1742 if ( !dataUTF8 )
1743 {
1744 // hardly ideal, but what else can we do if conversion failed?
1745 wxLogLastError(wxT("DoGetPartialTextExtents"));
1746 return false;
1747 }
1748
1749 pango_layout_set_text(m_layout, dataUTF8, -1);
1750
1751 // Calculate the position of each character based on the widths of
1752 // the previous characters
1753
1754 // Code borrowed from Scintilla's PlatGTK
1755 PangoLayoutIter *iter = pango_layout_get_iter(m_layout);
1756 PangoRectangle pos;
1757 pango_layout_iter_get_cluster_extents(iter, NULL, &pos);
1758 size_t i = 0;
1759 while (pango_layout_iter_next_cluster(iter))
1760 {
1761 pango_layout_iter_get_cluster_extents(iter, NULL, &pos);
1762 int position = PANGO_PIXELS(pos.x);
1763 widths[i++] = position;
1764 }
1765 while (i < len)
1766 widths[i++] = PANGO_PIXELS(pos.x + pos.width);
1767 pango_layout_iter_free(iter);
1768
1769 return true;
1770 }
1771
1772
1773 wxCoord wxWindowDCImpl::GetCharWidth() const
1774 {
1775 pango_layout_set_text( m_layout, "H", 1 );
1776 int w;
1777 pango_layout_get_pixel_size( m_layout, &w, NULL );
1778 return w;
1779 }
1780
1781 wxCoord wxWindowDCImpl::GetCharHeight() const
1782 {
1783 PangoFontMetrics *metrics = pango_context_get_metrics (m_context, m_fontdesc, pango_context_get_language(m_context));
1784 wxCHECK_MSG( metrics, -1, wxT("failed to get pango font metrics") );
1785
1786 wxCoord h = PANGO_PIXELS (pango_font_metrics_get_descent (metrics) +
1787 pango_font_metrics_get_ascent (metrics));
1788 pango_font_metrics_unref (metrics);
1789 return h;
1790 }
1791
1792 void wxWindowDCImpl::Clear()
1793 {
1794 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
1795
1796 if (!m_gdkwindow) return;
1797
1798 int width,height;
1799 DoGetSize( &width, &height );
1800 gdk_draw_rectangle( m_gdkwindow, m_bgGC, TRUE, 0, 0, width, height );
1801 }
1802
1803 void wxWindowDCImpl::SetFont( const wxFont &font )
1804 {
1805 m_font = font;
1806
1807 if (m_font.IsOk())
1808 {
1809 if (m_fontdesc)
1810 pango_font_description_free( m_fontdesc );
1811
1812 m_fontdesc = pango_font_description_copy( m_font.GetNativeFontInfo()->description );
1813
1814
1815 if (m_window)
1816 {
1817 PangoContext *oldContext = m_context;
1818
1819 m_context = m_window->GTKGetPangoDefaultContext();
1820
1821 // If we switch back/forth between different contexts
1822 // we also have to create a new layout. I think so,
1823 // at least, and it doesn't hurt to do it.
1824 if (oldContext != m_context)
1825 {
1826 if (m_layout)
1827 g_object_unref (m_layout);
1828
1829 m_layout = pango_layout_new( m_context );
1830 }
1831 }
1832
1833 pango_layout_set_font_description( m_layout, m_fontdesc );
1834 }
1835 }
1836
1837 void wxWindowDCImpl::SetPen( const wxPen &pen )
1838 {
1839 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
1840
1841 if (m_pen == pen) return;
1842
1843 m_pen = pen;
1844
1845 if (!m_pen.IsOk()) return;
1846
1847 if (!m_gdkwindow) return;
1848
1849 gint width = m_pen.GetWidth();
1850 if (width <= 0)
1851 {
1852 // CMB: if width is non-zero scale it with the dc
1853 width = 1;
1854 }
1855 else
1856 {
1857 // X doesn't allow different width in x and y and so we take
1858 // the average
1859 double w = 0.5 +
1860 ( fabs((double) XLOG2DEVREL(width)) +
1861 fabs((double) YLOG2DEVREL(width)) ) / 2.0;
1862 width = (int)w;
1863 if ( !width )
1864 {
1865 // width can't be 0 or an internal GTK error occurs inside
1866 // gdk_gc_set_dashes() below
1867 width = 1;
1868 }
1869 }
1870
1871 static const wxGTKDash dotted[] = {1, 1};
1872 static const wxGTKDash short_dashed[] = {2, 2};
1873 static const wxGTKDash wxCoord_dashed[] = {2, 4};
1874 static const wxGTKDash dotted_dashed[] = {3, 3, 1, 3};
1875
1876 // We express dash pattern in pen width unit, so we are
1877 // independent of zoom factor and so on...
1878 int req_nb_dash;
1879 const wxGTKDash *req_dash;
1880
1881 GdkLineStyle lineStyle = GDK_LINE_ON_OFF_DASH;
1882 switch (m_pen.GetStyle())
1883 {
1884 case wxPENSTYLE_USER_DASH:
1885 req_nb_dash = m_pen.GetDashCount();
1886 req_dash = (wxGTKDash*)m_pen.GetDash();
1887 break;
1888 case wxPENSTYLE_DOT:
1889 req_nb_dash = 2;
1890 req_dash = dotted;
1891 break;
1892 case wxPENSTYLE_LONG_DASH:
1893 req_nb_dash = 2;
1894 req_dash = wxCoord_dashed;
1895 break;
1896 case wxPENSTYLE_SHORT_DASH:
1897 req_nb_dash = 2;
1898 req_dash = short_dashed;
1899 break;
1900 case wxPENSTYLE_DOT_DASH:
1901 req_nb_dash = 4;
1902 req_dash = dotted_dashed;
1903 break;
1904
1905 case wxPENSTYLE_TRANSPARENT:
1906 case wxPENSTYLE_STIPPLE_MASK_OPAQUE:
1907 case wxPENSTYLE_STIPPLE:
1908 case wxPENSTYLE_SOLID:
1909 default:
1910 lineStyle = GDK_LINE_SOLID;
1911 req_dash = NULL;
1912 req_nb_dash = 0;
1913 break;
1914 }
1915
1916 if (req_dash && req_nb_dash)
1917 {
1918 wxGTKDash *real_req_dash = new wxGTKDash[req_nb_dash];
1919 if (real_req_dash)
1920 {
1921 for (int i = 0; i < req_nb_dash; i++)
1922 real_req_dash[i] = req_dash[i] * width;
1923 gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
1924 delete[] real_req_dash;
1925 }
1926 else
1927 {
1928 // No Memory. We use non-scaled dash pattern...
1929 gdk_gc_set_dashes( m_penGC, 0, (wxGTKDash*)req_dash, req_nb_dash );
1930 }
1931 }
1932
1933 GdkCapStyle capStyle = GDK_CAP_ROUND;
1934 switch (m_pen.GetCap())
1935 {
1936 case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
1937 case wxCAP_BUTT: { capStyle = GDK_CAP_BUTT; break; }
1938 case wxCAP_ROUND:
1939 default:
1940 if (width <= 1)
1941 {
1942 width = 0;
1943 capStyle = GDK_CAP_NOT_LAST;
1944 }
1945 break;
1946 }
1947
1948 GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
1949 switch (m_pen.GetJoin())
1950 {
1951 case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
1952 case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
1953 case wxJOIN_ROUND:
1954 default: { joinStyle = GDK_JOIN_ROUND; break; }
1955 }
1956
1957 gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
1958
1959 m_pen.GetColour().CalcPixel( m_cmap );
1960 gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
1961 }
1962
1963 void wxWindowDCImpl::SetBrush( const wxBrush &brush )
1964 {
1965 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
1966
1967 if (m_brush == brush) return;
1968
1969 m_brush = brush;
1970
1971 if (!m_brush.IsOk()) return;
1972
1973 if (!m_gdkwindow) return;
1974
1975 m_brush.GetColour().CalcPixel( m_cmap );
1976 gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
1977
1978 gdk_gc_set_fill( m_brushGC, GDK_SOLID );
1979
1980 if ((m_brush.GetStyle() == wxBRUSHSTYLE_STIPPLE) && (m_brush.GetStipple()->IsOk()))
1981 {
1982 if (m_brush.GetStipple()->GetDepth() != 1)
1983 {
1984 gdk_gc_set_fill( m_brushGC, GDK_TILED );
1985 gdk_gc_set_tile( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1986 }
1987 else
1988 {
1989 gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1990 gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1991 }
1992 }
1993
1994 if ((m_brush.GetStyle() == wxBRUSHSTYLE_STIPPLE_MASK_OPAQUE) && (m_brush.GetStipple()->GetMask()))
1995 {
1996 gdk_gc_set_fill( m_textGC, GDK_OPAQUE_STIPPLED);
1997 gdk_gc_set_stipple( m_textGC, m_brush.GetStipple()->GetMask()->GetBitmap() );
1998 }
1999
2000 if (m_brush.IsHatch())
2001 {
2002 gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
2003 gdk_gc_set_stipple(m_brushGC, GetHatch(m_brush.GetStyle()));
2004 }
2005 }
2006
2007 void wxWindowDCImpl::SetBackground( const wxBrush &brush )
2008 {
2009 /* CMB 21/7/98: Added SetBackground. Sets background brush
2010 * for Clear() and bg colour for shapes filled with cross-hatch brush */
2011
2012 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
2013
2014 if (m_backgroundBrush == brush) return;
2015
2016 m_backgroundBrush = brush;
2017
2018 if (!m_backgroundBrush.IsOk()) return;
2019
2020 if (!m_gdkwindow) return;
2021
2022 wxColor color = m_backgroundBrush.GetColour();
2023 color.CalcPixel(m_cmap);
2024 const GdkColor* gdkColor = color.GetColor();
2025 gdk_gc_set_background(m_brushGC, gdkColor);
2026 gdk_gc_set_background(m_penGC, gdkColor);
2027 gdk_gc_set_background(m_bgGC, gdkColor);
2028 gdk_gc_set_foreground(m_bgGC, gdkColor);
2029
2030
2031 gdk_gc_set_fill( m_bgGC, GDK_SOLID );
2032
2033 if (m_backgroundBrush.GetStyle() == wxBRUSHSTYLE_STIPPLE)
2034 {
2035 const wxBitmap* stipple = m_backgroundBrush.GetStipple();
2036 if (stipple->IsOk())
2037 {
2038 if (stipple->GetDepth() != 1)
2039 {
2040 gdk_gc_set_fill(m_bgGC, GDK_TILED);
2041 gdk_gc_set_tile(m_bgGC, stipple->GetPixmap());
2042 }
2043 else
2044 {
2045 gdk_gc_set_fill(m_bgGC, GDK_STIPPLED);
2046 gdk_gc_set_stipple(m_bgGC, stipple->GetPixmap());
2047 }
2048 }
2049 }
2050 else if (m_backgroundBrush.IsHatch())
2051 {
2052 gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
2053 gdk_gc_set_stipple(m_bgGC, GetHatch(m_backgroundBrush.GetStyle()));
2054 }
2055 }
2056
2057 void wxWindowDCImpl::SetLogicalFunction( wxRasterOperationMode function )
2058 {
2059 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
2060
2061 if (m_logicalFunction == function)
2062 return;
2063
2064 // VZ: shouldn't this be a CHECK?
2065 if (!m_gdkwindow)
2066 return;
2067
2068 GdkFunction mode;
2069 switch (function)
2070 {
2071 case wxXOR: mode = GDK_XOR; break;
2072 case wxINVERT: mode = GDK_INVERT; break;
2073 case wxOR_REVERSE: mode = GDK_OR_REVERSE; break;
2074 case wxAND_REVERSE: mode = GDK_AND_REVERSE; break;
2075 case wxCLEAR: mode = GDK_CLEAR; break;
2076 case wxSET: mode = GDK_SET; break;
2077 case wxOR_INVERT: mode = GDK_OR_INVERT; break;
2078 case wxAND: mode = GDK_AND; break;
2079 case wxOR: mode = GDK_OR; break;
2080 case wxEQUIV: mode = GDK_EQUIV; break;
2081 case wxNAND: mode = GDK_NAND; break;
2082 case wxAND_INVERT: mode = GDK_AND_INVERT; break;
2083 case wxCOPY: mode = GDK_COPY; break;
2084 case wxNO_OP: mode = GDK_NOOP; break;
2085 case wxSRC_INVERT: mode = GDK_COPY_INVERT; break;
2086 case wxNOR: mode = GDK_NOR; break;
2087 default:
2088 wxFAIL_MSG("unknown mode");
2089 return;
2090 }
2091
2092 m_logicalFunction = function;
2093
2094 gdk_gc_set_function( m_penGC, mode );
2095 gdk_gc_set_function( m_brushGC, mode );
2096
2097 // to stay compatible with wxMSW, we don't apply ROPs to the text
2098 // operations (i.e. DrawText/DrawRotatedText).
2099 // True, but mono-bitmaps use the m_textGC and they use ROPs as well.
2100 gdk_gc_set_function( m_textGC, mode );
2101 }
2102
2103 void wxWindowDCImpl::SetTextForeground( const wxColour &col )
2104 {
2105 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
2106
2107 // don't set m_textForegroundColour to an invalid colour as we'd crash
2108 // later then (we use m_textForegroundColour.GetColor() without checking
2109 // in a few places)
2110 if ( !col.IsOk() || (m_textForegroundColour == col) )
2111 return;
2112
2113 m_textForegroundColour = col;
2114
2115 if ( m_gdkwindow )
2116 {
2117 m_textForegroundColour.CalcPixel( m_cmap );
2118 gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
2119 }
2120 }
2121
2122 void wxWindowDCImpl::SetTextBackground( const wxColour &col )
2123 {
2124 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
2125
2126 // same as above
2127 if ( !col.IsOk() || (m_textBackgroundColour == col) )
2128 return;
2129
2130 m_textBackgroundColour = col;
2131
2132 if ( m_gdkwindow )
2133 {
2134 m_textBackgroundColour.CalcPixel( m_cmap );
2135 gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
2136 }
2137 }
2138
2139 void wxWindowDCImpl::SetBackgroundMode( int mode )
2140 {
2141 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
2142
2143 m_backgroundMode = mode;
2144 }
2145
2146 void wxWindowDCImpl::SetPalette( const wxPalette& WXUNUSED(palette) )
2147 {
2148 wxFAIL_MSG( wxT("wxWindowDCImpl::SetPalette not implemented") );
2149 }
2150
2151 void wxWindowDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
2152 {
2153 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
2154
2155 if (!m_gdkwindow) return;
2156
2157 wxRect rect;
2158 rect.x = XLOG2DEV(x);
2159 rect.y = YLOG2DEV(y);
2160 rect.width = XLOG2DEVREL(width);
2161 rect.height = YLOG2DEVREL(height);
2162
2163 if (m_window && m_window->m_wxwindow &&
2164 (m_window->GetLayoutDirection() == wxLayout_RightToLeft))
2165 {
2166 rect.x -= rect.width;
2167 }
2168
2169 DoSetDeviceClippingRegion(wxRegion(rect));
2170 }
2171
2172 void wxWindowDCImpl::DoSetDeviceClippingRegion( const wxRegion &region )
2173 {
2174 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
2175
2176 if (region.Empty())
2177 {
2178 DestroyClippingRegion();
2179 return;
2180 }
2181
2182 if (!m_gdkwindow) return;
2183
2184 if (!m_currentClippingRegion.IsNull())
2185 m_currentClippingRegion.Intersect( region );
2186 else
2187 m_currentClippingRegion.Union( region );
2188
2189 #if USE_PAINT_REGION
2190 if (!m_paintClippingRegion.IsNull())
2191 m_currentClippingRegion.Intersect( m_paintClippingRegion );
2192 #endif
2193
2194 wxCoord xx, yy, ww, hh;
2195 m_currentClippingRegion.GetBox( xx, yy, ww, hh );
2196 wxGTKDCImpl::DoSetClippingRegion( xx, yy, ww, hh );
2197
2198 GdkRegion* gdkRegion = m_currentClippingRegion.GetRegion();
2199 gdk_gc_set_clip_region(m_penGC, gdkRegion);
2200 gdk_gc_set_clip_region(m_brushGC, gdkRegion);
2201 gdk_gc_set_clip_region(m_textGC, gdkRegion);
2202 gdk_gc_set_clip_region(m_bgGC, gdkRegion);
2203 }
2204
2205 void wxWindowDCImpl::DestroyClippingRegion()
2206 {
2207 wxCHECK_RET( IsOk(), wxT("invalid window dc") );
2208
2209 wxDCImpl::DestroyClippingRegion();
2210
2211 m_currentClippingRegion.Clear();
2212
2213 #if USE_PAINT_REGION
2214 if (!m_paintClippingRegion.IsEmpty())
2215 m_currentClippingRegion.Union( m_paintClippingRegion );
2216 #endif
2217
2218 if (!m_gdkwindow) return;
2219
2220 GdkRegion* gdkRegion = NULL;
2221 if (!m_currentClippingRegion.IsEmpty())
2222 gdkRegion = m_currentClippingRegion.GetRegion();
2223
2224 gdk_gc_set_clip_region(m_penGC, gdkRegion);
2225 gdk_gc_set_clip_region(m_brushGC, gdkRegion);
2226 gdk_gc_set_clip_region(m_textGC, gdkRegion);
2227 gdk_gc_set_clip_region(m_bgGC, gdkRegion);
2228 }
2229
2230 void wxWindowDCImpl::Destroy()
2231 {
2232 if (m_penGC) wxFreePoolGC( m_penGC );
2233 m_penGC = NULL;
2234 if (m_brushGC) wxFreePoolGC( m_brushGC );
2235 m_brushGC = NULL;
2236 if (m_textGC) wxFreePoolGC( m_textGC );
2237 m_textGC = NULL;
2238 if (m_bgGC) wxFreePoolGC( m_bgGC );
2239 m_bgGC = NULL;
2240 }
2241
2242 void wxWindowDCImpl::SetDeviceOrigin( wxCoord x, wxCoord y )
2243 {
2244 m_deviceOriginX = x;
2245 m_deviceOriginY = y;
2246
2247 ComputeScaleAndOrigin();
2248 }
2249
2250 void wxWindowDCImpl::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
2251 {
2252 m_signX = (xLeftRight ? 1 : -1);
2253 m_signY = (yBottomUp ? -1 : 1);
2254
2255 if (m_window && m_window->m_wxwindow &&
2256 (m_window->GetLayoutDirection() == wxLayout_RightToLeft))
2257 m_signX = -m_signX;
2258
2259 ComputeScaleAndOrigin();
2260 }
2261
2262 void wxWindowDCImpl::ComputeScaleAndOrigin()
2263 {
2264 const wxRealPoint origScale(m_scaleX, m_scaleY);
2265
2266 wxDCImpl::ComputeScaleAndOrigin();
2267
2268 // if scale has changed call SetPen to recalulate the line width
2269 if ( wxRealPoint(m_scaleX, m_scaleY) != origScale && m_pen.IsOk() )
2270 {
2271 // this is a bit artificial, but we need to force wxDC to think the pen
2272 // has changed
2273 wxPen pen = m_pen;
2274 m_pen = wxNullPen;
2275 SetPen( pen );
2276 }
2277 }
2278
2279 // Resolution in pixels per logical inch
2280 wxSize wxWindowDCImpl::GetPPI() const
2281 {
2282 return wxSize( (int) (m_mm_to_pix_x * 25.4 + 0.5), (int) (m_mm_to_pix_y * 25.4 + 0.5));
2283 }
2284
2285 int wxWindowDCImpl::GetDepth() const
2286 {
2287 return gdk_drawable_get_depth(m_gdkwindow);
2288 }
2289
2290
2291 //-----------------------------------------------------------------------------
2292 // wxClientDCImpl
2293 //-----------------------------------------------------------------------------
2294
2295 IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
2296
2297 wxClientDCImpl::wxClientDCImpl( wxDC *owner )
2298 : wxWindowDCImpl( owner )
2299 {
2300 }
2301
2302 wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *win )
2303 : wxWindowDCImpl( owner, win )
2304 {
2305 wxCHECK_RET( win, wxT("NULL window in wxClientDCImpl::wxClientDC") );
2306
2307 #ifdef __WXUNIVERSAL__
2308 wxPoint ptOrigin = win->GetClientAreaOrigin();
2309 SetDeviceOrigin(ptOrigin.x, ptOrigin.y);
2310 wxSize size = win->GetClientSize();
2311 DoSetClippingRegion(0, 0, size.x, size.y);
2312 #endif
2313 // __WXUNIVERSAL__
2314 }
2315
2316 void wxClientDCImpl::DoGetSize(int *width, int *height) const
2317 {
2318 wxCHECK_RET( m_window, wxT("GetSize() doesn't work without window") );
2319
2320 m_window->GetClientSize( width, height );
2321 }
2322
2323 //-----------------------------------------------------------------------------
2324 // wxPaintDCImpl
2325 //-----------------------------------------------------------------------------
2326
2327 IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxClientDCImpl)
2328
2329 // Limit the paint region to the window size. Sometimes
2330 // the paint region is too big, and this risks X11 errors
2331 static void wxLimitRegionToSize(wxRegion& region, const wxSize& sz)
2332 {
2333 wxRect originalRect = region.GetBox();
2334 wxRect rect(originalRect);
2335 if (rect.width + rect.x > sz.x)
2336 rect.width = sz.x - rect.x;
2337 if (rect.height + rect.y > sz.y)
2338 rect.height = sz.y - rect.y;
2339 if (rect != originalRect)
2340 {
2341 region = wxRegion(rect);
2342 wxLogTrace(wxT("painting"), wxT("Limiting region from %d, %d, %d, %d to %d, %d, %d, %d\n"),
2343 originalRect.x, originalRect.y, originalRect.width, originalRect.height,
2344 rect.x, rect.y, rect.width, rect.height);
2345 }
2346 }
2347
2348 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner )
2349 : wxClientDCImpl( owner )
2350 {
2351 }
2352
2353 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner, wxWindow *win )
2354 : wxClientDCImpl( owner, win )
2355 {
2356 #if USE_PAINT_REGION
2357 if (!win->m_clipPaintRegion)
2358 return;
2359
2360 wxSize sz = win->GetSize();
2361 m_paintClippingRegion = win->m_nativeUpdateRegion;
2362 wxLimitRegionToSize(m_paintClippingRegion, sz);
2363
2364 GdkRegion *region = m_paintClippingRegion.GetRegion();
2365 if ( region )
2366 {
2367 m_currentClippingRegion.Union( m_paintClippingRegion );
2368 wxLimitRegionToSize(m_currentClippingRegion, sz);
2369
2370 if (sz.x <= 0 || sz.y <= 0)
2371 return ;
2372
2373 gdk_gc_set_clip_region( m_penGC, region );
2374 gdk_gc_set_clip_region( m_brushGC, region );
2375 gdk_gc_set_clip_region( m_textGC, region );
2376 gdk_gc_set_clip_region( m_bgGC, region );
2377 }
2378 #endif
2379 }
2380
2381 // ----------------------------------------------------------------------------
2382 // wxDCModule
2383 // ----------------------------------------------------------------------------
2384
2385 class wxDCModule : public wxModule
2386 {
2387 public:
2388 bool OnInit();
2389 void OnExit();
2390
2391 private:
2392 DECLARE_DYNAMIC_CLASS(wxDCModule)
2393 };
2394
2395 IMPLEMENT_DYNAMIC_CLASS(wxDCModule, wxModule)
2396
2397 bool wxDCModule::OnInit()
2398 {
2399 wxInitGCPool();
2400 return true;
2401 }
2402
2403 void wxDCModule::OnExit()
2404 {
2405 wxCleanUpGCPool();
2406
2407 for (int i = wxBRUSHSTYLE_LAST_HATCH - wxBRUSHSTYLE_FIRST_HATCH; i--; )
2408 {
2409 if (hatches[i])
2410 g_object_unref(hatches[i]);
2411 }
2412 }
wxWidgets (Impactor)