]> git.saurik.com Git - wxWidgets.git/blob - src/msw/bitmap.cpp
Unicode compilation fixes
[wxWidgets.git] / src / msw / bitmap.cpp
1 ////////////////////////////////////////////////////////////////////////////
2 // Name: bitmap.cpp
3 // Purpose: wxBitmap
4 // Author: Julian Smart
5 // Modified by:
6 // Created: 04/01/98
7 // RCS-ID: $Id$
8 // Copyright: (c) Julian Smart
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
21 #pragma implementation "bitmap.h"
22 #endif
23
24 // For compilers that support precompilation, includes "wx.h".
25 #include "wx/wxprec.h"
26
27 #ifdef __BORLANDC__
28 #pragma hdrstop
29 #endif
30
31 #ifndef WX_PRECOMP
32 #include <stdio.h>
33
34 #include "wx/list.h"
35 #include "wx/utils.h"
36 #include "wx/app.h"
37 #include "wx/palette.h"
38 #include "wx/dcmemory.h"
39 #include "wx/bitmap.h"
40 #include "wx/icon.h"
41 #endif
42
43 #include "wx/msw/private.h"
44 #include "wx/log.h"
45
46 #if wxUSE_WXDIB
47 #include "wx/msw/dib.h"
48 #endif
49
50 #include "wx/image.h"
51 #include "wx/xpmdecod.h"
52
53 #ifdef wxHAVE_RAW_BITMAP
54 #include "wx/rawbmp.h"
55 #endif
56
57 // missing from mingw32 header
58 #ifndef CLR_INVALID
59 #define CLR_INVALID ((COLORREF)-1)
60 #endif // no CLR_INVALID
61
62 // ----------------------------------------------------------------------------
63 // Bitmap data
64 // ----------------------------------------------------------------------------
65
66 class WXDLLEXPORT wxBitmapRefData : public wxGDIImageRefData
67 {
68 public:
69 wxBitmapRefData();
70 virtual ~wxBitmapRefData() { Free(); }
71
72 virtual void Free();
73
74 // set the mask object to use as the mask, we take ownership of it
75 void SetMask(wxMask *mask)
76 {
77 delete m_bitmapMask;
78 m_bitmapMask = mask;
79 }
80
81 // set the HBITMAP to use as the mask
82 void SetMask(HBITMAP hbmpMask)
83 {
84 SetMask(new wxMask((WXHBITMAP)hbmpMask));
85 }
86
87 // return the mask
88 wxMask *GetMask() const { return m_bitmapMask; }
89
90 public:
91 #if wxUSE_PALETTE
92 wxPalette m_bitmapPalette;
93 #endif // wxUSE_PALETTE
94
95 // MSW-specific
96 // ------------
97
98 #ifdef __WXDEBUG__
99 // this field is solely for error checking: we detect selecting a bitmap
100 // into more than one DC at once or deleting a bitmap still selected into a
101 // DC (both are serious programming errors under Windows)
102 wxDC *m_selectedInto;
103 #endif // __WXDEBUG__
104
105 #if wxUSE_WXDIB
106 // when GetRawData() is called for a DDB we need to convert it to a DIB
107 // first to be able to provide direct access to it and we cache that DIB
108 // here and convert it back to DDB when UngetRawData() is called
109 wxDIB *m_dib;
110 #endif
111
112 // true if we have alpha transparency info and can be drawn using
113 // AlphaBlend()
114 bool m_hasAlpha;
115
116 // true if our HBITMAP is a DIB section, false if it is a DDB
117 bool m_isDIB;
118
119 private:
120 // optional mask for transparent drawing
121 wxMask *m_bitmapMask;
122
123 DECLARE_NO_COPY_CLASS(wxBitmapRefData)
124 };
125
126 // ----------------------------------------------------------------------------
127 // macros
128 // ----------------------------------------------------------------------------
129
130 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
131 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
132
133 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
134
135 // ============================================================================
136 // implementation
137 // ============================================================================
138
139 // ----------------------------------------------------------------------------
140 // helper functions
141 // ----------------------------------------------------------------------------
142
143 // decide whether we should create a DIB or a DDB for the given parameters
144 //
145 // NB: we always use DIBs under Windows CE as this is much simpler (even if
146 // also less efficient...) and we obviously can't use them if there is no
147 // DIB support compiled in at all
148 #ifdef __WXWINCE__
149 static inline bool wxShouldCreateDIB(int, int, int, WXHDC) { return true; }
150
151 #define ALWAYS_USE_DIB
152 #elif !wxUSE_WXDIB
153 // no sense in defining wxShouldCreateDIB() as we can't compile code
154 // executed if it is true, so we have to use #if's anyhow
155 #define NEVER_USE_DIB
156 #else // wxUSE_WXDIB && !__WXWINCE__
157 static inline bool wxShouldCreateDIB(int w, int h, int d, WXHDC hdc)
158 {
159 // here is the logic:
160 //
161 // (a) if hdc is specified, the caller explicitly wants DDB
162 // (b) otherwise, create a DIB if depth >= 24 (we don't support 16bpp
163 // or less DIBs anyhow)
164 // (c) finally, create DIBs under Win9x even if the depth hasn't been
165 // explicitly specified but the current display depth is 24 or
166 // more and the image is "big", i.e. > 16Mb which is the
167 // theoretical limit for DDBs under Win9x
168 //
169 // consequences (all of which seem to make sense):
170 //
171 // (i) by default, DDBs are created (depth == -1 usually)
172 // (ii) DIBs can be created by explicitly specifying the depth
173 // (iii) using a DC always forces creating a DDB
174 return !hdc &&
175 (d >= 24 ||
176 (d == -1 &&
177 wxDIB::GetLineSize(w, wxDisplayDepth())*h > 16*1024*1024));
178 }
179
180 #define SOMETIMES_USE_DIB
181 #endif // different DIB usage scenarious
182
183 // ----------------------------------------------------------------------------
184 // wxBitmapRefData
185 // ----------------------------------------------------------------------------
186
187 wxBitmapRefData::wxBitmapRefData()
188 {
189 #ifdef __WXDEBUG__
190 m_selectedInto = NULL;
191 #endif
192 m_bitmapMask = NULL;
193
194 m_hBitmap = (WXHBITMAP) NULL;
195 #if wxUSE_WXDIB
196 m_dib = NULL;
197 #endif
198
199 m_isDIB =
200 m_hasAlpha = FALSE;
201 }
202
203 void wxBitmapRefData::Free()
204 {
205 wxASSERT_MSG( !m_selectedInto,
206 wxT("deleting bitmap still selected into wxMemoryDC") );
207
208 #if wxUSE_WXDIB
209 wxASSERT_MSG( !m_dib, _T("forgot to call wxBitmap::UngetRawData()!") );
210 #endif
211
212 if ( m_hBitmap)
213 {
214 if ( !::DeleteObject((HBITMAP)m_hBitmap) )
215 {
216 wxLogLastError(wxT("DeleteObject(hbitmap)"));
217 }
218 }
219
220 delete m_bitmapMask;
221 m_bitmapMask = NULL;
222 }
223
224 // ----------------------------------------------------------------------------
225 // wxBitmap creation
226 // ----------------------------------------------------------------------------
227
228 // this function should be called from all wxBitmap ctors
229 void wxBitmap::Init()
230 {
231 // m_refData = NULL; done in the base class ctor
232 }
233
234 wxGDIImageRefData *wxBitmap::CreateData() const
235 {
236 return new wxBitmapRefData;
237 }
238
239 #ifdef __WIN32__
240
241 bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
242 {
243 #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
244 // it may be either HICON or HCURSOR
245 HICON hicon = (HICON)icon.GetHandle();
246
247 ICONINFO iconInfo;
248 if ( !::GetIconInfo(hicon, &iconInfo) )
249 {
250 wxLogLastError(wxT("GetIconInfo"));
251
252 return FALSE;
253 }
254
255 wxBitmapRefData *refData = new wxBitmapRefData;
256 m_refData = refData;
257
258 int w = icon.GetWidth(),
259 h = icon.GetHeight();
260
261 refData->m_width = w;
262 refData->m_height = h;
263 refData->m_depth = wxDisplayDepth();
264
265 refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
266
267 // the mask returned by GetIconInfo() is inversed compared to the usual
268 // wxWin convention
269 refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
270
271
272 // delete the old one now as we don't need it any more
273 ::DeleteObject(iconInfo.hbmMask);
274
275 return TRUE;
276 #else
277 return FALSE;
278 #endif
279 }
280
281 #endif // Win32
282
283 bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
284 {
285 UnRef();
286
287 if ( !cursor.Ok() )
288 return FALSE;
289
290 return CopyFromIconOrCursor(cursor);
291 }
292
293 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
294 {
295 UnRef();
296
297 if ( !icon.Ok() )
298 return FALSE;
299
300 return CopyFromIconOrCursor(icon);
301 }
302
303 #ifndef NEVER_USE_DIB
304
305 bool wxBitmap::CopyFromDIB(const wxDIB& dib)
306 {
307 wxCHECK_MSG( dib.IsOk(), FALSE, _T("invalid DIB in CopyFromDIB") );
308
309 #ifdef SOMETIMES_USE_DIB
310 HBITMAP hbitmap = dib.CreateDDB();
311 if ( !hbitmap )
312 return FALSE;
313 #else // ALWAYS_USE_DIB
314 HBITMAP hbitmap = ((wxDIB &)dib).Detach(); // const_cast
315 #endif // SOMETIMES_USE_DIB/ALWAYS_USE_DIB
316
317 UnRef();
318
319 wxBitmapRefData *refData = new wxBitmapRefData;
320 m_refData = refData;
321
322 refData->m_width = dib.GetWidth();
323 refData->m_height = dib.GetHeight();
324 refData->m_depth = dib.GetDepth();
325
326 refData->m_hBitmap = (WXHBITMAP)hbitmap;
327
328 #if wxUSE_PALETTE
329 wxPalette *palette = dib.CreatePalette();
330 if ( palette )
331 {
332 refData->m_bitmapPalette = *palette;
333 }
334
335 delete palette;
336 #endif // wxUSE_PALETTE
337
338 return TRUE;
339 }
340
341 #endif // NEVER_USE_DIB
342
343 wxBitmap::~wxBitmap()
344 {
345 }
346
347 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
348 {
349 Init();
350
351 #ifndef __WXMICROWIN__
352 wxBitmapRefData *refData = new wxBitmapRefData;
353 m_refData = refData;
354
355 refData->m_width = width;
356 refData->m_height = height;
357 refData->m_depth = depth;
358
359 char *data;
360 if ( depth == 1 )
361 {
362 // we assume that it is in XBM format which is not quite the same as
363 // the format CreateBitmap() wants because the order of bytes in the
364 // line is inversed!
365 const size_t bytesPerLine = (width + 7) / 8;
366 const size_t padding = bytesPerLine % 2;
367 const size_t len = height * ( padding + bytesPerLine );
368 data = (char *)malloc(len);
369 const char *src = bits;
370 char *dst = data;
371
372 for ( int rows = 0; rows < height; rows++ )
373 {
374 for ( size_t cols = 0; cols < bytesPerLine; cols++ )
375 {
376 unsigned char val = *src++;
377 unsigned char reversed = 0;
378
379 for ( int bits = 0; bits < 8; bits++)
380 {
381 reversed <<= 1;
382 reversed |= (val & 0x01);
383 val >>= 1;
384 }
385 *dst++ = reversed;
386 }
387
388 if ( padding )
389 *dst++ = 0;
390 }
391 }
392 else
393 {
394 // bits should already be in Windows standard format
395 data = (char *)bits; // const_cast is harmless
396 }
397
398 HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
399 if ( !hbmp )
400 {
401 wxLogLastError(wxT("CreateBitmap"));
402 }
403
404 if ( data != bits )
405 {
406 free(data);
407 }
408
409 SetHBITMAP((WXHBITMAP)hbmp);
410 #endif
411 }
412
413 // Create from XPM data
414 #if wxUSE_IMAGE && wxUSE_XPM
415 bool wxBitmap::CreateFromXpm(const char **data)
416 #else
417 bool wxBitmap::CreateFromXpm(const char **WXUNUSED(data))
418 #endif
419 {
420 #if wxUSE_IMAGE && wxUSE_XPM
421 Init();
422
423 wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") )
424
425 wxXPMDecoder decoder;
426 wxImage img = decoder.ReadData(data);
427 wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
428
429 *this = wxBitmap(img);
430 return TRUE;
431 #else
432 return FALSE;
433 #endif
434 }
435
436 wxBitmap::wxBitmap(int w, int h, int d)
437 {
438 Init();
439
440 (void)Create(w, h, d);
441 }
442
443 wxBitmap::wxBitmap(int w, int h, const wxDC& dc)
444 {
445 Init();
446
447 (void)Create(w, h, dc);
448 }
449
450 wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
451 {
452 Init();
453
454 (void)Create(data, type, width, height, depth);
455 }
456
457 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
458 {
459 Init();
460
461 LoadFile(filename, (int)type);
462 }
463
464 bool wxBitmap::Create(int width, int height, int depth)
465 {
466 return DoCreate(width, height, depth, 0);
467 }
468
469 bool wxBitmap::Create(int width, int height, const wxDC& dc)
470 {
471 wxCHECK_MSG( dc.Ok(), FALSE, _T("invalid HDC in wxBitmap::Create()") );
472
473 return DoCreate(width, height, -1, dc.GetHDC());
474 }
475
476 bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc)
477 {
478 UnRef();
479
480 m_refData = new wxBitmapRefData;
481
482 GetBitmapData()->m_width = w;
483 GetBitmapData()->m_height = h;
484
485 HBITMAP hbmp wxDUMMY_INITIALIZE(0);
486
487 #ifndef NEVER_USE_DIB
488 if ( wxShouldCreateDIB(w, h, d, hdc) )
489 {
490 if ( d == -1 )
491 {
492 // create DIBs without alpha channel by default
493 d = 24;
494 }
495
496 wxDIB dib(w, h, d);
497 if ( !dib.IsOk() )
498 return FALSE;
499
500 // don't delete the DIB section in dib object dtor
501 hbmp = dib.Detach();
502
503 GetBitmapData()->m_isDIB = TRUE;
504 GetBitmapData()->m_depth = d;
505 }
506 else // create a DDB
507 #endif // NEVER_USE_DIB
508 {
509 #ifndef ALWAYS_USE_DIB
510 #ifndef __WXMICROWIN__
511 if ( d > 0 )
512 {
513 hbmp = ::CreateBitmap(w, h, 1, d, NULL);
514 if ( !hbmp )
515 {
516 wxLogLastError(wxT("CreateBitmap"));
517 }
518
519 GetBitmapData()->m_depth = d;
520 }
521 else // d == 0, create bitmap compatible with the screen
522 #endif // !__WXMICROWIN__
523 {
524 ScreenHDC dc;
525 hbmp = ::CreateCompatibleBitmap(dc, w, h);
526 if ( !hbmp )
527 {
528 wxLogLastError(wxT("CreateCompatibleBitmap"));
529 }
530
531 GetBitmapData()->m_depth = wxDisplayDepth();
532 }
533 #endif // !ALWAYS_USE_DIB
534 }
535
536 SetHBITMAP((WXHBITMAP)hbmp);
537
538 return Ok();
539 }
540
541 #if wxUSE_IMAGE
542
543 // ----------------------------------------------------------------------------
544 // wxImage to/from conversions for Microwin
545 // ----------------------------------------------------------------------------
546
547 // Microwin versions are so different from normal ones that it really doesn't
548 // make sense to use #ifdefs inside the function bodies
549 #ifdef __WXMICROWIN__
550
551 bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
552 {
553 // Set this to 1 to experiment with mask code,
554 // which currently doesn't work
555 #define USE_MASKS 0
556
557 m_refData = new wxBitmapRefData();
558
559 // Initial attempt at a simple-minded implementation.
560 // The bitmap will always be created at the screen depth,
561 // so the 'depth' argument is ignored.
562
563 HDC hScreenDC = ::GetDC(NULL);
564 int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL);
565
566 HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight());
567 HBITMAP hMaskBitmap = NULL;
568 HBITMAP hOldMaskBitmap = NULL;
569 HDC hMaskDC = NULL;
570 unsigned char maskR = 0;
571 unsigned char maskG = 0;
572 unsigned char maskB = 0;
573
574 // printf("Created bitmap %d\n", (int) hBitmap);
575 if (hBitmap == NULL)
576 {
577 ::ReleaseDC(NULL, hScreenDC);
578 return FALSE;
579 }
580 HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
581
582 HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
583 ::ReleaseDC(NULL, hScreenDC);
584
585 // created an mono-bitmap for the possible mask
586 bool hasMask = image.HasMask();
587
588 if ( hasMask )
589 {
590 #if USE_MASKS
591 // FIXME: we should be able to pass bpp = 1, but
592 // GdBlit can't handle a different depth
593 #if 0
594 hMaskBitmap = ::CreateBitmap( (WORD)image.GetWidth(), (WORD)image.GetHeight(), 1, 1, NULL );
595 #else
596 hMaskBitmap = ::CreateCompatibleBitmap( hMemDC, (WORD)image.GetWidth(), (WORD)image.GetHeight());
597 #endif
598 maskR = image.GetMaskRed();
599 maskG = image.GetMaskGreen();
600 maskB = image.GetMaskBlue();
601
602 if (!hMaskBitmap)
603 {
604 hasMask = FALSE;
605 }
606 else
607 {
608 hScreenDC = ::GetDC(NULL);
609 hMaskDC = ::CreateCompatibleDC(hScreenDC);
610 ::ReleaseDC(NULL, hScreenDC);
611
612 hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap);
613 }
614 #else
615 hasMask = FALSE;
616 #endif
617 }
618
619 int i, j;
620 for (i = 0; i < image.GetWidth(); i++)
621 {
622 for (j = 0; j < image.GetHeight(); j++)
623 {
624 unsigned char red = image.GetRed(i, j);
625 unsigned char green = image.GetGreen(i, j);
626 unsigned char blue = image.GetBlue(i, j);
627
628 ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue));
629
630 if (hasMask)
631 {
632 // scan the bitmap for the transparent colour and set the corresponding
633 // pixels in the mask to BLACK and the rest to WHITE
634 if (maskR == red && maskG == green && maskB == blue)
635 ::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0));
636 else
637 ::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255));
638 }
639 }
640 }
641
642 ::SelectObject(hMemDC, hOldBitmap);
643 ::DeleteDC(hMemDC);
644 if (hasMask)
645 {
646 ::SelectObject(hMaskDC, hOldMaskBitmap);
647 ::DeleteDC(hMaskDC);
648
649 ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap);
650 }
651
652 SetWidth(image.GetWidth());
653 SetHeight(image.GetHeight());
654 SetDepth(screenDepth);
655 SetHBITMAP( (WXHBITMAP) hBitmap );
656
657 #if wxUSE_PALETTE
658 // Copy the palette from the source image
659 SetPalette(image.GetPalette());
660 #endif // wxUSE_PALETTE
661
662 return TRUE;
663 }
664
665 wxImage wxBitmap::ConvertToImage() const
666 {
667 // Initial attempt at a simple-minded implementation.
668 // The bitmap will always be created at the screen depth,
669 // so the 'depth' argument is ignored.
670 // TODO: transparency (create a mask image)
671
672 if (!Ok())
673 {
674 wxFAIL_MSG( wxT("bitmap is invalid") );
675 return wxNullImage;
676 }
677
678 wxImage image;
679
680 wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
681
682 // create an wxImage object
683 int width = GetWidth();
684 int height = GetHeight();
685 image.Create( width, height );
686 unsigned char *data = image.GetData();
687 if( !data )
688 {
689 wxFAIL_MSG( wxT("could not allocate data for image") );
690 return wxNullImage;
691 }
692
693 HDC hScreenDC = ::GetDC(NULL);
694
695 HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
696 ::ReleaseDC(NULL, hScreenDC);
697
698 HBITMAP hBitmap = (HBITMAP) GetHBITMAP();
699
700 HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
701
702 int i, j;
703 for (i = 0; i < GetWidth(); i++)
704 {
705 for (j = 0; j < GetHeight(); j++)
706 {
707 COLORREF color = ::GetPixel(hMemDC, i, j);
708 unsigned char red = GetRValue(color);
709 unsigned char green = GetGValue(color);
710 unsigned char blue = GetBValue(color);
711
712 image.SetRGB(i, j, red, green, blue);
713 }
714 }
715
716 ::SelectObject(hMemDC, hOldBitmap);
717 ::DeleteDC(hMemDC);
718
719 #if wxUSE_PALETTE
720 // Copy the palette from the source image
721 if (GetPalette())
722 image.SetPalette(* GetPalette());
723 #endif // wxUSE_PALETTE
724
725 return image;
726 }
727
728 #endif // __WXMICROWIN__
729
730 // ----------------------------------------------------------------------------
731 // wxImage to/from conversions
732 // ----------------------------------------------------------------------------
733
734 #if wxUSE_WXDIB
735
736 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
737 {
738 return CreateFromImage(image, depth, 0);
739 }
740
741 bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc)
742 {
743 wxCHECK_MSG( dc.Ok(), FALSE,
744 _T("invalid HDC in wxBitmap::CreateFromImage()") );
745
746 return CreateFromImage(image, -1, dc.GetHDC());
747 }
748
749 bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
750 {
751 wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
752
753 UnRef();
754
755 // first convert the image to DIB
756 const int h = image.GetHeight();
757 const int w = image.GetWidth();
758
759 wxDIB dib(image);
760 if ( !dib.IsOk() )
761 return FALSE;
762
763
764 // store the bitmap parameters
765 wxBitmapRefData *refData = new wxBitmapRefData;
766 refData->m_width = w;
767 refData->m_height = h;
768 refData->m_hasAlpha = image.HasAlpha();
769
770 m_refData = refData;
771
772
773 // next either store DIB as is or create a DDB from it
774 HBITMAP hbitmap wxDUMMY_INITIALIZE(0);
775
776 // are we going to use DIB?
777 //
778 // NB: DDBs don't support alpha so if we have alpha channel we must use DIB
779 if ( image.HasAlpha() || wxShouldCreateDIB(w, h, depth, hdc) )
780 {
781 // don't delete the DIB section in dib object dtor
782 hbitmap = dib.Detach();
783
784 refData->m_isDIB = TRUE;
785 refData->m_depth = dib.GetDepth();
786 }
787 #ifndef ALWAYS_USE_DIB
788 else // we need to convert DIB to DDB
789 {
790 hbitmap = dib.CreateDDB((HDC)hdc);
791
792 refData->m_depth = depth == -1 ? dib.GetDepth() : depth;
793 }
794 #endif // !ALWAYS_USE_DIB
795
796 // validate this object
797 SetHBITMAP((WXHBITMAP)hbitmap);
798
799 // finally also set the mask if we have one
800 if ( image.HasMask() )
801 {
802 SetMask(new wxMask(*this, wxColour(image.GetMaskRed(),
803 image.GetMaskGreen(),
804 image.GetMaskBlue())));
805 }
806
807 return TRUE;
808 }
809
810 wxImage wxBitmap::ConvertToImage() const
811 {
812 wxDIB dib(*this);
813
814 wxImage image;
815 if ( dib.IsOk() )
816 {
817 image = dib.ConvertToImage();
818 if ( image.Ok() )
819 {
820 // TODO: set mask
821 }
822 }
823
824 return image;
825 }
826
827 #endif // wxUSE_WXDIB
828
829 #endif // wxUSE_IMAGE
830
831 // ----------------------------------------------------------------------------
832 // loading and saving bitmaps
833 // ----------------------------------------------------------------------------
834
835 bool wxBitmap::LoadFile(const wxString& filename, long type)
836 {
837 UnRef();
838
839 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
840
841 if ( handler )
842 {
843 m_refData = new wxBitmapRefData;
844
845 return handler->LoadFile(this, filename, type, -1, -1);
846 }
847 #if wxUSE_IMAGE
848 else // no bitmap handler found
849 {
850 wxImage image;
851 if ( image.LoadFile( filename, type ) && image.Ok() )
852 {
853 *this = wxBitmap(image);
854
855 return TRUE;
856 }
857 }
858 #endif // wxUSE_IMAGE
859
860 return FALSE;
861 }
862
863 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
864 {
865 UnRef();
866
867 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
868
869 if ( !handler )
870 {
871 wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type);
872
873 return FALSE;
874 }
875
876 m_refData = new wxBitmapRefData;
877
878 return handler->Create(this, data, type, width, height, depth);
879 }
880
881 bool wxBitmap::SaveFile(const wxString& filename,
882 int type,
883 const wxPalette *palette)
884 {
885 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
886
887 if ( handler )
888 {
889 return handler->SaveFile(this, filename, type, palette);
890 }
891 #if wxUSE_IMAGE
892 else // no bitmap handler found
893 {
894 // FIXME what about palette? shouldn't we use it?
895 wxImage image = ConvertToImage();
896 if ( image.Ok() )
897 {
898 return image.SaveFile(filename, type);
899 }
900 }
901 #endif // wxUSE_IMAGE
902
903 return FALSE;
904 }
905
906 // ----------------------------------------------------------------------------
907 // sub bitmap extraction
908 // ----------------------------------------------------------------------------
909
910 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
911 {
912 wxCHECK_MSG( Ok() &&
913 (rect.x >= 0) && (rect.y >= 0) &&
914 (rect.x+rect.width <= GetWidth()) &&
915 (rect.y+rect.height <= GetHeight()),
916 wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
917
918 wxBitmap ret( rect.width, rect.height );
919 wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
920
921 #ifndef __WXMICROWIN__
922 // TODO: copy alpha channel data if any
923
924 // copy bitmap data
925 MemoryHDC dcSrc,
926 dcDst;
927
928 {
929 SelectInHDC selectSrc(dcSrc, GetHbitmap()),
930 selectDst(dcDst, GetHbitmapOf(ret));
931
932 if ( !selectSrc || !selectDst )
933 {
934 wxLogLastError(_T("SelectObjct(hBitmap)"));
935 }
936
937 if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
938 dcSrc, rect.x, rect.y, SRCCOPY) )
939 {
940 wxLogLastError(_T("BitBlt"));
941 }
942 }
943
944 // copy mask if there is one
945 if ( GetMask() )
946 {
947 HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
948
949 SelectInHDC selectSrc(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()),
950 selectDst(dcDst, hbmpMask);
951
952 if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
953 dcSrc, rect.x, rect.y, SRCCOPY) )
954 {
955 wxLogLastError(_T("BitBlt"));
956 }
957
958 wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
959 ret.SetMask(mask);
960 }
961 #endif // !__WXMICROWIN__
962
963 return ret;
964 }
965
966 // ----------------------------------------------------------------------------
967 // wxBitmap accessors
968 // ----------------------------------------------------------------------------
969
970 #if wxUSE_PALETTE
971 wxPalette* wxBitmap::GetPalette() const
972 {
973 return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette
974 : (wxPalette *) NULL;
975 }
976 #endif
977
978 wxMask *wxBitmap::GetMask() const
979 {
980 return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL;
981 }
982
983 #ifdef __WXDEBUG__
984
985 wxDC *wxBitmap::GetSelectedInto() const
986 {
987 return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL;
988 }
989
990 #endif
991
992 #if WXWIN_COMPATIBILITY_2_4
993
994 int wxBitmap::GetQuality() const
995 {
996 return 0;
997 }
998
999 #endif // WXWIN_COMPATIBILITY_2_4
1000
1001 void wxBitmap::UseAlpha()
1002 {
1003 if ( GetBitmapData() )
1004 GetBitmapData()->m_hasAlpha = true;
1005 }
1006
1007 bool wxBitmap::HasAlpha() const
1008 {
1009 return GetBitmapData() && GetBitmapData()->m_hasAlpha;
1010 }
1011
1012 // ----------------------------------------------------------------------------
1013 // wxBitmap setters
1014 // ----------------------------------------------------------------------------
1015
1016 #ifdef __WXDEBUG__
1017
1018 void wxBitmap::SetSelectedInto(wxDC *dc)
1019 {
1020 if ( GetBitmapData() )
1021 GetBitmapData()->m_selectedInto = dc;
1022 }
1023
1024 #endif
1025
1026 #if wxUSE_PALETTE
1027
1028 void wxBitmap::SetPalette(const wxPalette& palette)
1029 {
1030 EnsureHasData();
1031
1032 GetBitmapData()->m_bitmapPalette = palette;
1033 }
1034
1035 #endif // wxUSE_PALETTE
1036
1037 void wxBitmap::SetMask(wxMask *mask)
1038 {
1039 EnsureHasData();
1040
1041 GetBitmapData()->SetMask(mask);
1042 }
1043
1044 #if WXWIN_COMPATIBILITY_2_4
1045
1046 void wxBitmap::SetQuality(int WXUNUSED(quality))
1047 {
1048 }
1049
1050 #endif // WXWIN_COMPATIBILITY_2_4
1051
1052 // ----------------------------------------------------------------------------
1053 // raw bitmap access support
1054 // ----------------------------------------------------------------------------
1055
1056 #ifdef wxHAVE_RAW_BITMAP
1057 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1058 {
1059 #if wxUSE_WXDIB
1060 if ( !Ok() )
1061 {
1062 // no bitmap, no data (raw or otherwise)
1063 return NULL;
1064 }
1065
1066 // if we're already a DIB we can access our data directly, but if not we
1067 // need to convert this DDB to a DIB section and use it for raw access and
1068 // then convert it back
1069 HBITMAP hDIB;
1070 if ( !GetBitmapData()->m_isDIB )
1071 {
1072 wxCHECK_MSG( !GetBitmapData()->m_dib, FALSE,
1073 _T("GetRawData() may be called only once") );
1074
1075 wxDIB *dib = new wxDIB(*this);
1076 if ( !dib->IsOk() )
1077 {
1078 delete dib;
1079
1080 return NULL;
1081 }
1082
1083 // we'll free it in UngetRawData()
1084 GetBitmapData()->m_dib = dib;
1085
1086 hDIB = dib->GetHandle();
1087 }
1088 else // we're a DIB
1089 {
1090 hDIB = GetHbitmap();
1091 }
1092
1093 DIBSECTION ds;
1094 if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) )
1095 {
1096 wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") );
1097
1098 return NULL;
1099 }
1100
1101 // check that the bitmap is in correct format
1102 if ( ds.dsBm.bmBitsPixel != bpp )
1103 {
1104 wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") );
1105
1106 return NULL;
1107 }
1108
1109 // ok, store the relevant info in wxPixelDataBase
1110 const LONG h = ds.dsBm.bmHeight;
1111
1112 data.m_width = ds.dsBm.bmWidth;
1113 data.m_height = h;
1114
1115 // remember that DIBs are stored in top to bottom order!
1116 const LONG bytesPerRow = ds.dsBm.bmWidthBytes;
1117 data.m_stride = -bytesPerRow;
1118
1119 char *bits = (char *)ds.dsBm.bmBits;
1120 if ( h > 1 )
1121 {
1122 bits += (h - 1)*bytesPerRow;
1123 }
1124
1125 return bits;
1126 #else
1127 return NULL;
1128 #endif
1129 }
1130
1131 void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
1132 {
1133 #if wxUSE_WXDIB
1134 if ( !Ok() )
1135 return;
1136
1137 // the cast is ugly but we can't do without it and without making this
1138 // function template (and hence inline) unfortunately
1139 typedef wxPixelData<wxBitmap, wxAlphaPixelFormat> PixelData;
1140 PixelData& data = (PixelData &)dataBase;
1141
1142 if ( !data )
1143 {
1144 // invalid data, don't crash -- but don't assert neither as we're
1145 // called automatically from wxPixelDataBase dtor and so there is no
1146 // way to prevent this from happening
1147 return;
1148 }
1149
1150 if ( GetBitmapData()->m_hasAlpha )
1151 {
1152 // AlphaBlend() wants to have premultiplied source alpha but
1153 // wxRawBitmap API uses normal, not premultiplied, colours, so adjust
1154 // them here now
1155 PixelData::Iterator p(data);
1156
1157 const int w = data.GetWidth();
1158 const int h = data.GetHeight();
1159
1160 for ( int y = 0; y < h; y++ )
1161 {
1162 PixelData::Iterator rowStart = p;
1163
1164 for ( int x = 0; x < w; x++ )
1165 {
1166 const unsigned alpha = p.Alpha();
1167
1168 p.Red() = (p.Red() * alpha + 127) / 255;
1169 p.Blue() = (p.Blue() * alpha + 127) / 255;
1170 p.Green() = (p.Green() * alpha + 127) / 255;
1171
1172 ++p;
1173 }
1174
1175 p = rowStart;
1176 p.OffsetY(data, 1);
1177 }
1178 }
1179
1180 // if we're a DDB we need to convert DIB back to DDB now to make the
1181 // changes made via raw bitmap access effective
1182 if ( !GetBitmapData()->m_isDIB )
1183 {
1184 wxDIB *dib = GetBitmapData()->m_dib;
1185 GetBitmapData()->m_dib = NULL;
1186
1187 // TODO: convert
1188
1189 delete dib;
1190 }
1191 #endif // wxUSE_WXDIB
1192 }
1193 #endif // #ifdef wxHAVE_RAW_BITMAP
1194
1195 // ----------------------------------------------------------------------------
1196 // wxMask
1197 // ----------------------------------------------------------------------------
1198
1199 wxMask::wxMask()
1200 {
1201 m_maskBitmap = 0;
1202 }
1203
1204 // Construct a mask from a bitmap and a colour indicating
1205 // the transparent area
1206 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
1207 {
1208 m_maskBitmap = 0;
1209 Create(bitmap, colour);
1210 }
1211
1212 // Construct a mask from a bitmap and a palette index indicating
1213 // the transparent area
1214 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
1215 {
1216 m_maskBitmap = 0;
1217 Create(bitmap, paletteIndex);
1218 }
1219
1220 // Construct a mask from a mono bitmap (copies the bitmap).
1221 wxMask::wxMask(const wxBitmap& bitmap)
1222 {
1223 m_maskBitmap = 0;
1224 Create(bitmap);
1225 }
1226
1227 wxMask::~wxMask()
1228 {
1229 if ( m_maskBitmap )
1230 ::DeleteObject((HBITMAP) m_maskBitmap);
1231 }
1232
1233 // Create a mask from a mono bitmap (copies the bitmap).
1234 bool wxMask::Create(const wxBitmap& bitmap)
1235 {
1236 #ifndef __WXMICROWIN__
1237 wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
1238 _T("can't create mask from invalid or not monochrome bitmap") );
1239
1240 if ( m_maskBitmap )
1241 {
1242 ::DeleteObject((HBITMAP) m_maskBitmap);
1243 m_maskBitmap = 0;
1244 }
1245
1246 m_maskBitmap = (WXHBITMAP) CreateBitmap(
1247 bitmap.GetWidth(),
1248 bitmap.GetHeight(),
1249 1, 1, 0
1250 );
1251 HDC srcDC = CreateCompatibleDC(0);
1252 SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
1253 HDC destDC = CreateCompatibleDC(0);
1254 SelectObject(destDC, (HBITMAP) m_maskBitmap);
1255 BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
1256 SelectObject(srcDC, 0);
1257 DeleteDC(srcDC);
1258 SelectObject(destDC, 0);
1259 DeleteDC(destDC);
1260 return TRUE;
1261 #else
1262 return FALSE;
1263 #endif
1264 }
1265
1266 // Create a mask from a bitmap and a palette index indicating
1267 // the transparent area
1268 bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
1269 {
1270 if ( m_maskBitmap )
1271 {
1272 ::DeleteObject((HBITMAP) m_maskBitmap);
1273 m_maskBitmap = 0;
1274 }
1275
1276 #if wxUSE_PALETTE
1277 if (bitmap.Ok() && bitmap.GetPalette()->Ok())
1278 {
1279 unsigned char red, green, blue;
1280 if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
1281 {
1282 wxColour transparentColour(red, green, blue);
1283 return Create(bitmap, transparentColour);
1284 }
1285 }
1286 #endif // wxUSE_PALETTE
1287
1288 return FALSE;
1289 }
1290
1291 // Create a mask from a bitmap and a colour indicating
1292 // the transparent area
1293 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1294 {
1295 #ifndef __WXMICROWIN__
1296 wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
1297
1298 if ( m_maskBitmap )
1299 {
1300 ::DeleteObject((HBITMAP) m_maskBitmap);
1301 m_maskBitmap = 0;
1302 }
1303
1304 int width = bitmap.GetWidth(),
1305 height = bitmap.GetHeight();
1306
1307 // scan the bitmap for the transparent colour and set the corresponding
1308 // pixels in the mask to BLACK and the rest to WHITE
1309 COLORREF maskColour = wxColourToPalRGB(colour);
1310 m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
1311
1312 HDC srcDC = ::CreateCompatibleDC(NULL);
1313 HDC destDC = ::CreateCompatibleDC(NULL);
1314 if ( !srcDC || !destDC )
1315 {
1316 wxLogLastError(wxT("CreateCompatibleDC"));
1317 }
1318
1319 bool ok = TRUE;
1320
1321 // SelectObject() will fail
1322 wxASSERT_MSG( !bitmap.GetSelectedInto(),
1323 _T("bitmap can't be selected in another DC") );
1324
1325 HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
1326 if ( !hbmpSrcOld )
1327 {
1328 wxLogLastError(wxT("SelectObject"));
1329
1330 ok = FALSE;
1331 }
1332
1333 HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
1334 if ( !hbmpDstOld )
1335 {
1336 wxLogLastError(wxT("SelectObject"));
1337
1338 ok = FALSE;
1339 }
1340
1341 if ( ok )
1342 {
1343 // this will create a monochrome bitmap with 0 points for the pixels
1344 // which have the same value as the background colour and 1 for the
1345 // others
1346 ::SetBkColor(srcDC, maskColour);
1347 ::BitBlt(destDC, 0, 0, width, height, srcDC, 0, 0, NOTSRCCOPY);
1348 }
1349
1350 ::SelectObject(srcDC, hbmpSrcOld);
1351 ::DeleteDC(srcDC);
1352 ::SelectObject(destDC, hbmpDstOld);
1353 ::DeleteDC(destDC);
1354
1355 return ok;
1356 #else // __WXMICROWIN__
1357 return FALSE;
1358 #endif // __WXMICROWIN__/!__WXMICROWIN__
1359 }
1360
1361 // ----------------------------------------------------------------------------
1362 // wxBitmapHandler
1363 // ----------------------------------------------------------------------------
1364
1365 bool wxBitmapHandler::Create(wxGDIImage *image,
1366 void *data,
1367 long flags,
1368 int width, int height, int depth)
1369 {
1370 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1371
1372 return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
1373 }
1374
1375 bool wxBitmapHandler::Load(wxGDIImage *image,
1376 const wxString& name,
1377 long flags,
1378 int width, int height)
1379 {
1380 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1381
1382 return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
1383 }
1384
1385 bool wxBitmapHandler::Save(wxGDIImage *image,
1386 const wxString& name,
1387 int type)
1388 {
1389 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1390
1391 return bitmap ? SaveFile(bitmap, name, type) : FALSE;
1392 }
1393
1394 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
1395 void *WXUNUSED(data),
1396 long WXUNUSED(type),
1397 int WXUNUSED(width),
1398 int WXUNUSED(height),
1399 int WXUNUSED(depth))
1400 {
1401 return FALSE;
1402 }
1403
1404 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
1405 const wxString& WXUNUSED(name),
1406 long WXUNUSED(type),
1407 int WXUNUSED(desiredWidth),
1408 int WXUNUSED(desiredHeight))
1409 {
1410 return FALSE;
1411 }
1412
1413 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
1414 const wxString& WXUNUSED(name),
1415 int WXUNUSED(type),
1416 const wxPalette *WXUNUSED(palette))
1417 {
1418 return FALSE;
1419 }
1420
1421 // ----------------------------------------------------------------------------
1422 // DIB functions
1423 // ----------------------------------------------------------------------------
1424
1425 #ifndef __WXMICROWIN__
1426 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
1427 HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
1428 {
1429 unsigned long i, headerSize;
1430
1431 // Allocate space for a DIB header
1432 headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
1433 LPBITMAPINFO lpDIBheader = (BITMAPINFO *) malloc(headerSize);
1434 LPPALETTEENTRY lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
1435
1436 GetPaletteEntries(hPal, 0, 256, lpPe);
1437
1438 memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
1439
1440 // Fill in the static parts of the DIB header
1441 lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
1442 lpDIBheader->bmiHeader.biWidth = xSize;
1443 lpDIBheader->bmiHeader.biHeight = ySize;
1444 lpDIBheader->bmiHeader.biPlanes = 1;
1445
1446 // this value must be 1, 4, 8 or 24 so PixelDepth can only be
1447 lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
1448 lpDIBheader->bmiHeader.biCompression = BI_RGB;
1449 lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
1450 lpDIBheader->bmiHeader.biClrUsed = 256;
1451
1452
1453 // Initialize the DIB palette
1454 for (i = 0; i < 256; i++) {
1455 lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
1456 lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
1457 lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
1458 lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
1459 }
1460
1461 *lpDIBHeader = lpDIBheader;
1462
1463 return TRUE;
1464 }
1465
1466 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
1467 {
1468 free(lpDIBHeader);
1469 }
1470 #endif
1471
1472 // ----------------------------------------------------------------------------
1473 // global helper functions implemented here
1474 // ----------------------------------------------------------------------------
1475
1476 // helper of wxBitmapToHICON/HCURSOR
1477 static
1478 HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
1479 bool iconWanted,
1480 int hotSpotX,
1481 int hotSpotY)
1482 {
1483 if ( !bmp.Ok() )
1484 {
1485 // we can't create an icon/cursor form nothing
1486 return 0;
1487 }
1488
1489 wxMask *mask = bmp.GetMask();
1490 if ( !mask )
1491 {
1492 // we must have a mask for an icon, so even if it's probably incorrect,
1493 // do create it (grey is the "standard" transparent colour)
1494 mask = new wxMask(bmp, *wxLIGHT_GREY);
1495 }
1496
1497 ICONINFO iconInfo;
1498 wxZeroMemory(iconInfo);
1499 iconInfo.fIcon = iconWanted; // do we want an icon or a cursor?
1500 if ( !iconWanted )
1501 {
1502 iconInfo.xHotspot = hotSpotX;
1503 iconInfo.yHotspot = hotSpotY;
1504 }
1505
1506 iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
1507 iconInfo.hbmColor = GetHbitmapOf(bmp);
1508
1509 // black out the transparent area to preserve background colour, because
1510 // Windows blits the original bitmap using SRCINVERT (XOR) after applying
1511 // the mask to the dest rect.
1512 {
1513 MemoryHDC dcSrc, dcDst;
1514 SelectInHDC selectMask(dcSrc, (HBITMAP)mask->GetMaskBitmap()),
1515 selectBitmap(dcDst, iconInfo.hbmColor);
1516
1517 if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(),
1518 dcSrc, 0, 0, SRCAND) )
1519 {
1520 wxLogLastError(_T("BitBlt"));
1521 }
1522 }
1523
1524 HICON hicon = ::CreateIconIndirect(&iconInfo);
1525
1526 if ( !bmp.GetMask() )
1527 {
1528 // we created the mask, now delete it
1529 delete mask;
1530 }
1531
1532 // delete the inverted mask bitmap we created as well
1533 ::DeleteObject(iconInfo.hbmMask);
1534
1535 return hicon;
1536 }
1537
1538 HICON wxBitmapToHICON(const wxBitmap& bmp)
1539 {
1540 return wxBitmapToIconOrCursor(bmp, TRUE, 0, 0);
1541 }
1542
1543 HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY)
1544 {
1545 return (HCURSOR)wxBitmapToIconOrCursor(bmp, FALSE, hotSpotX, hotSpotY);
1546 }
1547
1548 HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
1549 {
1550 #ifndef __WXMICROWIN__
1551 wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
1552
1553 // get width/height from the bitmap if not given
1554 if ( !w || !h )
1555 {
1556 BITMAP bm;
1557 ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
1558 w = bm.bmWidth;
1559 h = bm.bmHeight;
1560 }
1561
1562 HDC hdcSrc = ::CreateCompatibleDC(NULL);
1563 HDC hdcDst = ::CreateCompatibleDC(NULL);
1564 if ( !hdcSrc || !hdcDst )
1565 {
1566 wxLogLastError(wxT("CreateCompatibleDC"));
1567 }
1568
1569 HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
1570 if ( !hbmpInvMask )
1571 {
1572 wxLogLastError(wxT("CreateBitmap"));
1573 }
1574
1575 HGDIOBJ srcTmp = ::SelectObject(hdcSrc, hbmpMask);
1576 HGDIOBJ dstTmp = ::SelectObject(hdcDst, hbmpInvMask);
1577 if ( !::BitBlt(hdcDst, 0, 0, w, h,
1578 hdcSrc, 0, 0,
1579 NOTSRCCOPY) )
1580 {
1581 wxLogLastError(wxT("BitBlt"));
1582 }
1583
1584 // Deselect objects
1585 SelectObject(hdcSrc,srcTmp);
1586 SelectObject(hdcDst,dstTmp);
1587
1588 ::DeleteDC(hdcSrc);
1589 ::DeleteDC(hdcDst);
1590
1591 return hbmpInvMask;
1592 #else
1593 return 0;
1594 #endif
1595 }