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[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 #ifdef __GNUG__
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 static bool wxShouldCreateDIB(int w, int h, int d, WXHDC hdc)
145 {
146 #if wxUSE_WXDIB
147 // here is the logic:
148 //
149 // (a) if hdc is specified, the caller explicitly wants DDB
150 // (b) otherwise, create a DIB if depth >= 24 (we don't support 16bpp or
151 // less DIBs anyhow)
152 // (c) finally, create DIBs under Win9x even if the depth hasn't been
153 // explicitly specified but the current display depth is 24 or more
154 // and the image is "big", i.e. > 16Mb which is the theoretical limit
155 // for DDBs under Win9x
156 //
157 // consequences (all of which seem to make sense):
158 //
159 // (i) by default, DDBs are created (depth == -1 usually)
160 // (ii) DIBs can be created by explicitly specifying the depth
161 // (iii) using a DC always forces creating a DDB
162 return !hdc &&
163 (d >= 24 ||
164 (d == -1 &&
165 wxDIB::GetLineSize(w, wxDisplayDepth())*h > 16*1024*1024));
166 #else
167 return FALSE;
168 #endif
169 }
170
171 // ----------------------------------------------------------------------------
172 // wxBitmapRefData
173 // ----------------------------------------------------------------------------
174
175 wxBitmapRefData::wxBitmapRefData()
176 {
177 #ifdef __WXDEBUG__
178 m_selectedInto = NULL;
179 #endif
180 m_bitmapMask = NULL;
181
182 m_hBitmap = (WXHBITMAP) NULL;
183 #if wxUSE_WXDIB
184 m_dib = NULL;
185 #endif
186
187 m_isDIB =
188 m_hasAlpha = FALSE;
189 }
190
191 void wxBitmapRefData::Free()
192 {
193 wxASSERT_MSG( !m_selectedInto,
194 wxT("deleting bitmap still selected into wxMemoryDC") );
195
196 #if wxUSE_WXDIB
197 wxASSERT_MSG( !m_dib, _T("forgot to call wxBitmap::UngetRawData()!") );
198 #endif
199
200 if ( m_hBitmap)
201 {
202 if ( !::DeleteObject((HBITMAP)m_hBitmap) )
203 {
204 wxLogLastError(wxT("DeleteObject(hbitmap)"));
205 }
206 }
207
208 delete m_bitmapMask;
209 m_bitmapMask = NULL;
210 }
211
212 // ----------------------------------------------------------------------------
213 // wxBitmap creation
214 // ----------------------------------------------------------------------------
215
216 // this function should be called from all wxBitmap ctors
217 void wxBitmap::Init()
218 {
219 // m_refData = NULL; done in the base class ctor
220 }
221
222 wxGDIImageRefData *wxBitmap::CreateData() const
223 {
224 return new wxBitmapRefData;
225 }
226
227 #ifdef __WIN32__
228
229 bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
230 {
231 #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
232 // it may be either HICON or HCURSOR
233 HICON hicon = (HICON)icon.GetHandle();
234
235 ICONINFO iconInfo;
236 if ( !::GetIconInfo(hicon, &iconInfo) )
237 {
238 wxLogLastError(wxT("GetIconInfo"));
239
240 return FALSE;
241 }
242
243 wxBitmapRefData *refData = new wxBitmapRefData;
244 m_refData = refData;
245
246 int w = icon.GetWidth(),
247 h = icon.GetHeight();
248
249 refData->m_width = w;
250 refData->m_height = h;
251 refData->m_depth = wxDisplayDepth();
252
253 refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
254
255 // the mask returned by GetIconInfo() is inversed compared to the usual
256 // wxWin convention
257 refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
258
259
260 // delete the old one now as we don't need it any more
261 ::DeleteObject(iconInfo.hbmMask);
262
263 #if WXWIN_COMPATIBILITY_2
264 refData->m_ok = TRUE;
265 #endif // WXWIN_COMPATIBILITY_2
266
267 return TRUE;
268 #else
269 return FALSE;
270 #endif
271 }
272
273 #endif // Win32
274
275 bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
276 {
277 UnRef();
278
279 if ( !cursor.Ok() )
280 return FALSE;
281
282 #ifdef __WIN16__
283 wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") );
284
285 return FALSE;
286 #else
287 return CopyFromIconOrCursor(cursor);
288 #endif // Win16
289 }
290
291 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
292 {
293 UnRef();
294
295 if ( !icon.Ok() )
296 return FALSE;
297
298 // GetIconInfo() doesn't exist under Win16 and I don't know any other way
299 // to create a bitmap from icon there - but using this way we won't have
300 // the mask (FIXME)
301 #ifdef __WIN16__
302 int width = icon.GetWidth(),
303 height = icon.GetHeight();
304
305 // copy the icon to the bitmap
306 ScreenHDC hdcScreen;
307 HDC hdc = ::CreateCompatibleDC(hdcScreen);
308 HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
309 HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap);
310
311 ::DrawIcon(hdc, 0, 0, GetHiconOf(icon));
312
313 ::SelectObject(hdc, hbmpOld);
314 ::DeleteDC(hdc);
315
316 wxBitmapRefData *refData = new wxBitmapRefData;
317 m_refData = refData;
318
319 refData->m_width = width;
320 refData->m_height = height;
321 refData->m_depth = wxDisplayDepth();
322
323 refData->m_hBitmap = (WXHBITMAP)hbitmap;
324
325 #if WXWIN_COMPATIBILITY_2
326 refData->m_ok = TRUE;
327 #endif // WXWIN_COMPATIBILITY_2
328
329 return TRUE;
330 #else // Win32
331 return CopyFromIconOrCursor(icon);
332 #endif // Win16/Win32
333 }
334
335 #if wxUSE_WXDIB
336 bool wxBitmap::CopyFromDIB(const wxDIB& dib)
337 {
338 wxCHECK_MSG( dib.IsOk(), FALSE, _T("invalid DIB in CopyFromDIB") );
339
340 HBITMAP hbitmap = dib.CreateDDB();
341 if ( !hbitmap )
342 return FALSE;
343
344 UnRef();
345
346 wxBitmapRefData *refData = new wxBitmapRefData;
347 m_refData = refData;
348
349 refData->m_width = dib.GetWidth();
350 refData->m_height = dib.GetHeight();
351 refData->m_depth = dib.GetDepth();
352
353 refData->m_hBitmap = (WXHBITMAP)hbitmap;
354
355 #if wxUSE_PALETTE
356 wxPalette *palette = dib.CreatePalette();
357 if ( palette )
358 {
359 refData->m_bitmapPalette = *palette;
360 }
361
362 delete palette;
363 #endif // wxUSE_PALETTE
364
365 return TRUE;
366 }
367 #endif
368
369 wxBitmap::~wxBitmap()
370 {
371 }
372
373 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
374 {
375 Init();
376
377 #ifndef __WXMICROWIN__
378 wxBitmapRefData *refData = new wxBitmapRefData;
379 m_refData = refData;
380
381 refData->m_width = width;
382 refData->m_height = height;
383 refData->m_depth = depth;
384
385 char *data;
386 if ( depth == 1 )
387 {
388 // we assume that it is in XBM format which is not quite the same as
389 // the format CreateBitmap() wants because the order of bytes in the
390 // line is inversed!
391 const size_t bytesPerLine = (width + 7) / 8;
392 const size_t padding = bytesPerLine % 2;
393 const size_t len = height * ( padding + bytesPerLine );
394 data = (char *)malloc(len);
395 const char *src = bits;
396 char *dst = data;
397
398 for ( int rows = 0; rows < height; rows++ )
399 {
400 for ( size_t cols = 0; cols < bytesPerLine; cols++ )
401 {
402 unsigned char val = *src++;
403 unsigned char reversed = 0;
404
405 for ( int bits = 0; bits < 8; bits++)
406 {
407 reversed <<= 1;
408 reversed |= (val & 0x01);
409 val >>= 1;
410 }
411 *dst++ = reversed;
412 }
413
414 if ( padding )
415 *dst++ = 0;
416 }
417 }
418 else
419 {
420 // bits should already be in Windows standard format
421 data = (char *)bits; // const_cast is harmless
422 }
423
424 HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
425 if ( !hbmp )
426 {
427 wxLogLastError(wxT("CreateBitmap"));
428 }
429
430 if ( data != bits )
431 {
432 free(data);
433 }
434
435 SetHBITMAP((WXHBITMAP)hbmp);
436 #endif
437 }
438
439 // Create from XPM data
440 bool wxBitmap::CreateFromXpm(const char **data)
441 {
442 #if wxUSE_IMAGE && wxUSE_XPM
443 Init();
444
445 wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") )
446
447 wxXPMDecoder decoder;
448 wxImage img = decoder.ReadData(data);
449 wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
450
451 *this = wxBitmap(img);
452 return TRUE;
453 #else
454 return FALSE;
455 #endif
456 }
457
458 wxBitmap::wxBitmap(int w, int h, int d)
459 {
460 Init();
461
462 (void)Create(w, h, d);
463 }
464
465 wxBitmap::wxBitmap(int w, int h, const wxDC& dc)
466 {
467 Init();
468
469 (void)Create(w, h, dc);
470 }
471
472 wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
473 {
474 Init();
475
476 (void)Create(data, type, width, height, depth);
477 }
478
479 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
480 {
481 Init();
482
483 LoadFile(filename, (int)type);
484 }
485
486 bool wxBitmap::Create(int width, int height, int depth)
487 {
488 return DoCreate(width, height, depth, 0);
489 }
490
491 bool wxBitmap::Create(int width, int height, const wxDC& dc)
492 {
493 wxCHECK_MSG( dc.Ok(), FALSE, _T("invalid HDC in wxBitmap::Create()") );
494
495 return DoCreate(width, height, -1, dc.GetHDC());
496 }
497
498 bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc)
499 {
500 UnRef();
501
502 m_refData = new wxBitmapRefData;
503
504 GetBitmapData()->m_width = w;
505 GetBitmapData()->m_height = h;
506
507 HBITMAP hbmp;
508
509 if ( wxShouldCreateDIB(w, h, d, hdc) )
510 {
511 if ( d == -1 )
512 {
513 // create DIBs without alpha channel by default
514 d = 24;
515 }
516
517 wxDIB dib(w, h, d);
518 if ( !dib.IsOk() )
519 return FALSE;
520
521 // don't delete the DIB section in dib object dtor
522 hbmp = dib.Detach();
523
524 GetBitmapData()->m_isDIB = TRUE;
525 GetBitmapData()->m_depth = d;
526 }
527 else // create a DDB
528 {
529 if ( d == -1 )
530 d = wxDisplayDepth();
531
532 GetBitmapData()->m_depth = d;
533
534 #ifndef __WXMICROWIN__
535 if ( d > 0 )
536 {
537 hbmp = ::CreateBitmap(w, h, 1, d, NULL);
538 if ( !hbmp )
539 {
540 wxLogLastError(wxT("CreateBitmap"));
541 }
542 }
543 else
544 #endif // !__WXMICROWIN__
545 {
546 ScreenHDC dc;
547 hbmp = ::CreateCompatibleBitmap(dc, w, h);
548 if ( !hbmp )
549 {
550 wxLogLastError(wxT("CreateCompatibleBitmap"));
551 }
552
553 GetBitmapData()->m_depth = wxDisplayDepth();
554 }
555 }
556
557 SetHBITMAP((WXHBITMAP)hbmp);
558
559 #if WXWIN_COMPATIBILITY_2
560 GetBitmapData()->m_ok = hbmp != 0;
561 #endif // WXWIN_COMPATIBILITY_2
562
563 return Ok();
564 }
565
566 #if wxUSE_IMAGE
567
568 // ----------------------------------------------------------------------------
569 // wxImage to/from conversions for Microwin
570 // ----------------------------------------------------------------------------
571
572 // Microwin versions are so different from normal ones that it really doesn't
573 // make sense to use #ifdefs inside the function bodies
574 #ifdef __WXMICROWIN__
575
576 bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
577 {
578 // Set this to 1 to experiment with mask code,
579 // which currently doesn't work
580 #define USE_MASKS 0
581
582 m_refData = new wxBitmapRefData();
583
584 // Initial attempt at a simple-minded implementation.
585 // The bitmap will always be created at the screen depth,
586 // so the 'depth' argument is ignored.
587
588 HDC hScreenDC = ::GetDC(NULL);
589 int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL);
590
591 HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight());
592 HBITMAP hMaskBitmap = NULL;
593 HBITMAP hOldMaskBitmap = NULL;
594 HDC hMaskDC = NULL;
595 unsigned char maskR = 0;
596 unsigned char maskG = 0;
597 unsigned char maskB = 0;
598
599 // printf("Created bitmap %d\n", (int) hBitmap);
600 if (hBitmap == NULL)
601 {
602 ::ReleaseDC(NULL, hScreenDC);
603 return FALSE;
604 }
605 HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
606
607 HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
608 ::ReleaseDC(NULL, hScreenDC);
609
610 // created an mono-bitmap for the possible mask
611 bool hasMask = image.HasMask();
612
613 if ( hasMask )
614 {
615 #if USE_MASKS
616 // FIXME: we should be able to pass bpp = 1, but
617 // GdBlit can't handle a different depth
618 #if 0
619 hMaskBitmap = ::CreateBitmap( (WORD)image.GetWidth(), (WORD)image.GetHeight(), 1, 1, NULL );
620 #else
621 hMaskBitmap = ::CreateCompatibleBitmap( hMemDC, (WORD)image.GetWidth(), (WORD)image.GetHeight());
622 #endif
623 maskR = image.GetMaskRed();
624 maskG = image.GetMaskGreen();
625 maskB = image.GetMaskBlue();
626
627 if (!hMaskBitmap)
628 {
629 hasMask = FALSE;
630 }
631 else
632 {
633 hScreenDC = ::GetDC(NULL);
634 hMaskDC = ::CreateCompatibleDC(hScreenDC);
635 ::ReleaseDC(NULL, hScreenDC);
636
637 hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap);
638 }
639 #else
640 hasMask = FALSE;
641 #endif
642 }
643
644 int i, j;
645 for (i = 0; i < image.GetWidth(); i++)
646 {
647 for (j = 0; j < image.GetHeight(); j++)
648 {
649 unsigned char red = image.GetRed(i, j);
650 unsigned char green = image.GetGreen(i, j);
651 unsigned char blue = image.GetBlue(i, j);
652
653 ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue));
654
655 if (hasMask)
656 {
657 // scan the bitmap for the transparent colour and set the corresponding
658 // pixels in the mask to BLACK and the rest to WHITE
659 if (maskR == red && maskG == green && maskB == blue)
660 ::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0));
661 else
662 ::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255));
663 }
664 }
665 }
666
667 ::SelectObject(hMemDC, hOldBitmap);
668 ::DeleteDC(hMemDC);
669 if (hasMask)
670 {
671 ::SelectObject(hMaskDC, hOldMaskBitmap);
672 ::DeleteDC(hMaskDC);
673
674 ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap);
675 }
676
677 SetWidth(image.GetWidth());
678 SetHeight(image.GetHeight());
679 SetDepth(screenDepth);
680 SetHBITMAP( (WXHBITMAP) hBitmap );
681
682 #if wxUSE_PALETTE
683 // Copy the palette from the source image
684 SetPalette(image.GetPalette());
685 #endif // wxUSE_PALETTE
686
687 #if WXWIN_COMPATIBILITY_2
688 // check the wxBitmap object
689 GetBitmapData()->SetOk();
690 #endif // WXWIN_COMPATIBILITY_2
691
692 return TRUE;
693 }
694
695 wxImage wxBitmap::ConvertToImage() const
696 {
697 // Initial attempt at a simple-minded implementation.
698 // The bitmap will always be created at the screen depth,
699 // so the 'depth' argument is ignored.
700 // TODO: transparency (create a mask image)
701
702 if (!Ok())
703 {
704 wxFAIL_MSG( wxT("bitmap is invalid") );
705 return wxNullImage;
706 }
707
708 wxImage image;
709
710 wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
711
712 // create an wxImage object
713 int width = GetWidth();
714 int height = GetHeight();
715 image.Create( width, height );
716 unsigned char *data = image.GetData();
717 if( !data )
718 {
719 wxFAIL_MSG( wxT("could not allocate data for image") );
720 return wxNullImage;
721 }
722
723 HDC hScreenDC = ::GetDC(NULL);
724
725 HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
726 ::ReleaseDC(NULL, hScreenDC);
727
728 HBITMAP hBitmap = (HBITMAP) GetHBITMAP();
729
730 HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
731
732 int i, j;
733 for (i = 0; i < GetWidth(); i++)
734 {
735 for (j = 0; j < GetHeight(); j++)
736 {
737 COLORREF color = ::GetPixel(hMemDC, i, j);
738 unsigned char red = GetRValue(color);
739 unsigned char green = GetGValue(color);
740 unsigned char blue = GetBValue(color);
741
742 image.SetRGB(i, j, red, green, blue);
743 }
744 }
745
746 ::SelectObject(hMemDC, hOldBitmap);
747 ::DeleteDC(hMemDC);
748
749 #if wxUSE_PALETTE
750 // Copy the palette from the source image
751 if (GetPalette())
752 image.SetPalette(* GetPalette());
753 #endif // wxUSE_PALETTE
754
755 return image;
756 }
757
758 #endif // __WXMICROWIN__
759
760 // ----------------------------------------------------------------------------
761 // wxImage to/from conversions
762 // ----------------------------------------------------------------------------
763
764 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
765 {
766 return CreateFromImage(image, depth, 0);
767 }
768
769 bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc)
770 {
771 wxCHECK_MSG( dc.Ok(), FALSE,
772 _T("invalid HDC in wxBitmap::CreateFromImage()") );
773
774 return CreateFromImage(image, -1, dc.GetHDC());
775 }
776
777 bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc )
778 {
779 wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
780
781 UnRef();
782
783 // first convert the image to DIB
784 const int h = image.GetHeight();
785 const int w = image.GetWidth();
786
787 wxDIB dib(image);
788 if ( !dib.IsOk() )
789 return FALSE;
790
791
792 // store the bitmap parameters
793 wxBitmapRefData *refData = new wxBitmapRefData;
794 refData->m_width = w;
795 refData->m_height = h;
796 refData->m_hasAlpha = image.HasAlpha();
797
798 m_refData = refData;
799
800
801 // next either store DIB as is or create a DDB from it
802 HBITMAP hbitmap;
803
804 // are we going to use DIB?
805 //
806 // NB: DDBs don't support alpha so if we have alpha channel we must use DIB
807 if ( image.HasAlpha() || wxShouldCreateDIB(w, h, depth, hdc) )
808 {
809 // don't delete the DIB section in dib object dtor
810 hbitmap = dib.Detach();
811
812 refData->m_isDIB = TRUE;
813 refData->m_depth = dib.GetDepth();
814 }
815 else // we need to convert DIB to DDB
816 {
817 hbitmap = dib.CreateDDB((HDC)hdc);
818
819 refData->m_depth = depth == -1 ? wxDisplayDepth() : depth;
820 }
821
822 // validate this object
823 SetHBITMAP((WXHBITMAP)hbitmap);
824
825 #if WXWIN_COMPATIBILITY_2
826 m_refData->m_ok = TRUE;
827 #endif // WXWIN_COMPATIBILITY_2
828
829 // finally also set the mask if we have one
830 if ( image.HasMask() )
831 {
832 SetMask(new wxMask(*this, wxColour(image.GetMaskRed(),
833 image.GetMaskGreen(),
834 image.GetMaskBlue())));
835 }
836
837 return TRUE;
838 }
839
840 wxImage wxBitmap::ConvertToImage() const
841 {
842 // FIXME: this is untested code for WinCE, and
843 // the mask is not yet handled.
844 // For tips, see:
845 // http://www.codeproject.com/bitmap/dibsection.asp?print=true
846
847 #ifdef __WXWINCE__
848 // the colour used as transparent one in wxImage and the one it is replaced
849 // with when it really occurs in the bitmap
850 static const int MASK_RED = 1;
851 static const int MASK_GREEN = 2;
852 static const int MASK_BLUE = 3;
853 static const int MASK_BLUE_REPLACEMENT = 2;
854
855 wxImage image;
856
857 wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
858
859 // create an wxImage object
860 int width = GetWidth();
861 int height = GetHeight();
862 image.Create( width, height );
863 unsigned char *data = image.GetData();
864 if( !data )
865 {
866 wxFAIL_MSG( wxT("could not allocate data for image") );
867 return wxNullImage;
868 }
869
870 // calc the number of bytes per scanline and padding in the DIB
871 int bytePerLine = width*3;
872 int sizeDWORD = sizeof( DWORD );
873 int lineBoundary = bytePerLine % sizeDWORD;
874 int padding = 0;
875 if( lineBoundary > 0 )
876 {
877 padding = sizeDWORD - lineBoundary;
878 bytePerLine += padding;
879 }
880
881 // create a DIB header
882 int headersize = sizeof(BITMAPINFOHEADER);
883 BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
884 if( !lpDIBh )
885 {
886 wxFAIL_MSG( wxT("could not allocate data for DIB header") );
887 free( data );
888 return wxNullImage;
889 }
890 // Fill in the DIB header
891 lpDIBh->bmiHeader.biSize = headersize;
892 lpDIBh->bmiHeader.biWidth = width;
893 lpDIBh->bmiHeader.biHeight = -height;
894 lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
895 lpDIBh->bmiHeader.biPlanes = 1;
896 lpDIBh->bmiHeader.biBitCount = 24;
897 lpDIBh->bmiHeader.biCompression = BI_RGB;
898 lpDIBh->bmiHeader.biClrUsed = 0;
899 // These seem not really needed for our purpose here.
900 lpDIBh->bmiHeader.biClrImportant = 0;
901 lpDIBh->bmiHeader.biXPelsPerMeter = 0;
902 lpDIBh->bmiHeader.biYPelsPerMeter = 0;
903
904 // memory for DIB data is allocated by CreateDIBSection
905 void *lpBits = NULL;
906
907 // copy data from the device-dependent bitmap to the DIB
908 HDC hdc = ::GetDC(NULL);
909 HBITMAP hBitmap = (HBITMAP) GetHBITMAP();
910
911 HBITMAP hBitmapSection = ::CreateDIBSection( hdc, lpDIBh, DIB_RGB_COLORS, & lpBits, NULL, 0 );
912 if (!hBitmapSection)
913 {
914 wxFAIL_MSG( wxT("could not create a DIB section") );
915 return wxNullImage;
916 }
917
918 // Copy the image from the DDB to the DIBSection
919 // Need to copy the supplied bitmap onto the newly created DIBsection
920 HDC hMemDC = CreateCompatibleDC(hdc);
921 HDC hCopyDC = CreateCompatibleDC(hdc);
922
923 if (! hMemDC || ! hCopyDC)
924 {
925 wxFAIL_MSG( wxT("unable to create compatible DCs") );
926 return wxNullImage;
927 }
928
929 #if 0
930 if (m_hPal)
931 {
932 SelectPalette(hMemDC, m_hPal, FALSE); RealizePalette(hMemDC);
933 SelectPalette(hCopyDC, m_hPal, FALSE); RealizePalette(hCopyDC);
934 }
935 #endif
936
937 HBITMAP hOldMemBitmap = (HBITMAP) SelectObject(hMemDC, hBitmap);
938 HBITMAP hOldCopyBitmap = (HBITMAP) SelectObject(hCopyDC, hBitmapSection);
939
940 BitBlt(hCopyDC, 0, 0, GetWidth(), GetHeight(), hMemDC, 0, 0, SRCCOPY);
941
942 SelectObject(hMemDC, hOldMemBitmap);
943 SelectObject(hCopyDC, hOldCopyBitmap);
944 DeleteDC(hMemDC);
945 DeleteDC(hCopyDC);
946
947 #if 0
948 if (m_hPal)
949 {
950 HGDIOBJ hObj = ::GetStockObject(DEFAULT_PALETTE);
951 SelectObject(hMemDC, hObj);
952 SelectObject(hCopyDC, hObj);
953 }
954 #endif
955
956 ReleaseDC(NULL, hdc);
957
958 // copy DIB data into the wxImage object
959 int i, j;
960 unsigned char *ptdata = data;
961 unsigned char *ptbits = (unsigned char*) lpBits;
962 for( i=0; i<height; i++ )
963 {
964 for( j=0; j<width; j++ )
965 {
966 *(ptdata++) = *(ptbits+2);
967 *(ptdata++) = *(ptbits+1);
968 *(ptdata++) = *(ptbits );
969 ptbits += 3;
970 }
971 ptbits += padding;
972 }
973
974 // TODO
975 #if 0
976 // similarly, set data according to the possible mask bitmap
977 if( GetMask() && GetMask()->GetMaskBitmap() )
978 {
979 hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
980 // memory DC created, color set, data copied, and memory DC deleted
981 HDC memdc = ::CreateCompatibleDC( hdc );
982 ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
983 ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
984 ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
985 ::DeleteDC( memdc );
986 ptdata = data;
987 ptbits = lpBits;
988 for( i=0; i<height; i++ )
989 {
990 for( j=0; j<width; j++ )
991 {
992 // is this pixel transparent?
993 if ( *ptbits != 0 )
994 {
995 if ( (ptdata[0] == MASK_RED) &&
996 (ptdata[1] == MASK_GREEN) &&
997 (ptdata[2] == MASK_BLUE) )
998 {
999 // we have to fudge the colour a bit to prevent this
1000 // pixel from appearing transparent
1001 ptdata[2] = MASK_BLUE_REPLACEMENT;
1002 }
1003 ptdata += 3;
1004 }
1005 else // masked pixel
1006 {
1007 *(ptdata++) = MASK_RED;
1008 *(ptdata++) = MASK_GREEN;
1009 *(ptdata++) = MASK_BLUE;
1010 }
1011 ptbits += 3;
1012 }
1013 ptbits += padding;
1014 }
1015
1016 image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1017 image.SetMask( TRUE );
1018 }
1019 else
1020 #endif
1021 {
1022 image.SetMask( FALSE );
1023 }
1024
1025 // free allocated resources
1026 ::ReleaseDC(NULL, hdc);
1027 free(lpDIBh);
1028
1029 // Delete the DIB section
1030 ::DeleteObject(hBitmapSection);
1031
1032 return image;
1033 #else
1034 // the colour used as transparent one in wxImage and the one it is replaced
1035 // with when it really occurs in the bitmap
1036 static const int MASK_RED = 1;
1037 static const int MASK_GREEN = 2;
1038 static const int MASK_BLUE = 3;
1039 static const int MASK_BLUE_REPLACEMENT = 2;
1040
1041 wxImage image;
1042
1043 wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
1044
1045 // create an wxImage object
1046 int width = GetWidth();
1047 int height = GetHeight();
1048 image.Create( width, height );
1049 unsigned char *data = image.GetData();
1050 if( !data )
1051 {
1052 wxFAIL_MSG( wxT("could not allocate data for image") );
1053 return wxNullImage;
1054 }
1055
1056 // calc the number of bytes per scanline and padding in the DIB
1057 int bytePerLine = width*3;
1058 int sizeDWORD = sizeof( DWORD );
1059 int lineBoundary = bytePerLine % sizeDWORD;
1060 int padding = 0;
1061 if( lineBoundary > 0 )
1062 {
1063 padding = sizeDWORD - lineBoundary;
1064 bytePerLine += padding;
1065 }
1066
1067 // create a DIB header
1068 int headersize = sizeof(BITMAPINFOHEADER);
1069 BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
1070 if( !lpDIBh )
1071 {
1072 wxFAIL_MSG( wxT("could not allocate data for DIB header") );
1073 free( data );
1074 return wxNullImage;
1075 }
1076 // Fill in the DIB header
1077 lpDIBh->bmiHeader.biSize = headersize;
1078 lpDIBh->bmiHeader.biWidth = width;
1079 lpDIBh->bmiHeader.biHeight = -height;
1080 lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
1081 lpDIBh->bmiHeader.biPlanes = 1;
1082 lpDIBh->bmiHeader.biBitCount = 24;
1083 lpDIBh->bmiHeader.biCompression = BI_RGB;
1084 lpDIBh->bmiHeader.biClrUsed = 0;
1085 // These seem not really needed for our purpose here.
1086 lpDIBh->bmiHeader.biClrImportant = 0;
1087 lpDIBh->bmiHeader.biXPelsPerMeter = 0;
1088 lpDIBh->bmiHeader.biYPelsPerMeter = 0;
1089 // memory for DIB data
1090 unsigned char *lpBits;
1091 lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
1092 if( !lpBits )
1093 {
1094 wxFAIL_MSG( wxT("could not allocate data for DIB") );
1095 free( data );
1096 free( lpDIBh );
1097 return wxNullImage;
1098 }
1099
1100 // copy data from the device-dependent bitmap to the DIB
1101 HDC hdc = ::GetDC(NULL);
1102 HBITMAP hbitmap;
1103 hbitmap = (HBITMAP) GetHBITMAP();
1104 ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
1105
1106 // copy DIB data into the wxImage object
1107 int i, j;
1108 unsigned char *ptdata = data;
1109 unsigned char *ptbits = lpBits;
1110 for( i=0; i<height; i++ )
1111 {
1112 for( j=0; j<width; j++ )
1113 {
1114 *(ptdata++) = *(ptbits+2);
1115 *(ptdata++) = *(ptbits+1);
1116 *(ptdata++) = *(ptbits );
1117 ptbits += 3;
1118 }
1119 ptbits += padding;
1120 }
1121
1122 // similarly, set data according to the possible mask bitmap
1123 if( GetMask() && GetMask()->GetMaskBitmap() )
1124 {
1125 hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
1126 // memory DC created, color set, data copied, and memory DC deleted
1127 HDC memdc = ::CreateCompatibleDC( hdc );
1128 ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
1129 ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
1130 ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
1131 ::DeleteDC( memdc );
1132 ptdata = data;
1133 ptbits = lpBits;
1134 for( i=0; i<height; i++ )
1135 {
1136 for( j=0; j<width; j++ )
1137 {
1138 // is this pixel transparent?
1139 if ( *ptbits != 0 )
1140 {
1141 if ( (ptdata[0] == MASK_RED) &&
1142 (ptdata[1] == MASK_GREEN) &&
1143 (ptdata[2] == MASK_BLUE) )
1144 {
1145 // we have to fudge the colour a bit to prevent this
1146 // pixel from appearing transparent
1147 ptdata[2] = MASK_BLUE_REPLACEMENT;
1148 }
1149 ptdata += 3;
1150 }
1151 else // masked pixel
1152 {
1153 *(ptdata++) = MASK_RED;
1154 *(ptdata++) = MASK_GREEN;
1155 *(ptdata++) = MASK_BLUE;
1156 }
1157 ptbits += 3;
1158 }
1159 ptbits += padding;
1160 }
1161
1162 image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1163 image.SetMask( TRUE );
1164 }
1165 else
1166 {
1167 image.SetMask( FALSE );
1168 }
1169 // free allocated resources
1170 ::ReleaseDC(NULL, hdc);
1171 free(lpDIBh);
1172 free(lpBits);
1173
1174 return image;
1175 #endif
1176 }
1177
1178 #endif // wxUSE_IMAGE
1179
1180 // ----------------------------------------------------------------------------
1181 // loading and saving bitmaps
1182 // ----------------------------------------------------------------------------
1183
1184 bool wxBitmap::LoadFile(const wxString& filename, long type)
1185 {
1186 UnRef();
1187
1188 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
1189
1190 if ( handler )
1191 {
1192 m_refData = new wxBitmapRefData;
1193
1194 return handler->LoadFile(this, filename, type, -1, -1);
1195 }
1196 #if wxUSE_IMAGE
1197 else
1198 {
1199 wxImage image;
1200 if ( image.LoadFile( filename, type ) && image.Ok() )
1201 {
1202 *this = wxBitmap(image);
1203
1204 return TRUE;
1205 }
1206 }
1207 #endif // wxUSE_IMAGE
1208
1209 return FALSE;
1210 }
1211
1212 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
1213 {
1214 UnRef();
1215
1216 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
1217
1218 if ( !handler )
1219 {
1220 wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type);
1221
1222 return FALSE;
1223 }
1224
1225 m_refData = new wxBitmapRefData;
1226
1227 return handler->Create(this, data, type, width, height, depth);
1228 }
1229
1230 bool wxBitmap::SaveFile(const wxString& filename,
1231 int type,
1232 const wxPalette *palette)
1233 {
1234 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
1235
1236 if ( handler )
1237 {
1238 return handler->SaveFile(this, filename, type, palette);
1239 }
1240 #if wxUSE_IMAGE
1241 else
1242 {
1243 // FIXME what about palette? shouldn't we use it?
1244 wxImage image = ConvertToImage();
1245 if ( image.Ok() )
1246 {
1247 return image.SaveFile(filename, type);
1248 }
1249 }
1250 #endif // wxUSE_IMAGE
1251
1252 return FALSE;
1253 }
1254
1255 // ----------------------------------------------------------------------------
1256 // sub bitmap extraction
1257 // ----------------------------------------------------------------------------
1258
1259 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1260 {
1261 wxCHECK_MSG( Ok() &&
1262 (rect.x >= 0) && (rect.y >= 0) &&
1263 (rect.x+rect.width <= GetWidth()) &&
1264 (rect.y+rect.height <= GetHeight()),
1265 wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
1266
1267 wxBitmap ret( rect.width, rect.height );
1268 wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1269
1270 #ifndef __WXMICROWIN__
1271 // TODO: copy alpha channel data if any
1272
1273 // copy bitmap data
1274 MemoryHDC dcSrc,
1275 dcDst;
1276
1277 {
1278 SelectInHDC selectSrc(dcSrc, GetHbitmap()),
1279 selectDst(dcDst, GetHbitmapOf(ret));
1280
1281 if ( !selectSrc || !selectDst )
1282 {
1283 wxLogLastError(_T("SelectObjct(hBitmap)"));
1284 }
1285
1286 if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
1287 dcSrc, rect.x, rect.y, SRCCOPY) )
1288 {
1289 wxLogLastError(_T("BitBlt"));
1290 }
1291 }
1292
1293 // copy mask if there is one
1294 if ( GetMask() )
1295 {
1296 HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
1297
1298 SelectInHDC selectSrc(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()),
1299 selectDst(dcDst, hbmpMask);
1300
1301 if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
1302 dcSrc, rect.x, rect.y, SRCCOPY) )
1303 {
1304 wxLogLastError(_T("BitBlt"));
1305 }
1306
1307 wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
1308 ret.SetMask(mask);
1309 }
1310 #endif // !__WXMICROWIN__
1311
1312 return ret;
1313 }
1314
1315 // ----------------------------------------------------------------------------
1316 // wxBitmap accessors
1317 // ----------------------------------------------------------------------------
1318
1319 #if wxUSE_PALETTE
1320 wxPalette* wxBitmap::GetPalette() const
1321 {
1322 return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette
1323 : (wxPalette *) NULL;
1324 }
1325 #endif
1326
1327 wxMask *wxBitmap::GetMask() const
1328 {
1329 return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL;
1330 }
1331
1332 #ifdef __WXDEBUG__
1333
1334 wxDC *wxBitmap::GetSelectedInto() const
1335 {
1336 return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL;
1337 }
1338
1339 #endif
1340
1341 #if WXWIN_COMPATIBILITY_2_4
1342
1343 int wxBitmap::GetQuality() const
1344 {
1345 return 0;
1346 }
1347
1348 #endif // WXWIN_COMPATIBILITY_2_4
1349
1350 void wxBitmap::UseAlpha()
1351 {
1352 if ( GetBitmapData() )
1353 GetBitmapData()->m_hasAlpha = true;
1354 }
1355
1356 bool wxBitmap::HasAlpha() const
1357 {
1358 return GetBitmapData() && GetBitmapData()->m_hasAlpha;
1359 }
1360
1361 // ----------------------------------------------------------------------------
1362 // wxBitmap setters
1363 // ----------------------------------------------------------------------------
1364
1365 #ifdef __WXDEBUG__
1366
1367 void wxBitmap::SetSelectedInto(wxDC *dc)
1368 {
1369 if ( GetBitmapData() )
1370 GetBitmapData()->m_selectedInto = dc;
1371 }
1372
1373 #endif
1374
1375 #if wxUSE_PALETTE
1376
1377 void wxBitmap::SetPalette(const wxPalette& palette)
1378 {
1379 EnsureHasData();
1380
1381 GetBitmapData()->m_bitmapPalette = palette;
1382 }
1383
1384 #endif // wxUSE_PALETTE
1385
1386 void wxBitmap::SetMask(wxMask *mask)
1387 {
1388 EnsureHasData();
1389
1390 GetBitmapData()->SetMask(mask);
1391 }
1392
1393 #if WXWIN_COMPATIBILITY_2
1394
1395 void wxBitmap::SetOk(bool isOk)
1396 {
1397 EnsureHasData();
1398
1399 GetBitmapData()->m_ok = isOk;
1400 }
1401
1402 #endif // WXWIN_COMPATIBILITY_2
1403
1404 #if WXWIN_COMPATIBILITY_2_4
1405
1406 void wxBitmap::SetQuality(int WXUNUSED(quality))
1407 {
1408 }
1409
1410 #endif // WXWIN_COMPATIBILITY_2_4
1411
1412 // ----------------------------------------------------------------------------
1413 // raw bitmap access support
1414 // ----------------------------------------------------------------------------
1415
1416 #ifdef wxHAVE_RAW_BITMAP
1417 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1418 {
1419 #if wxUSE_WXDIB
1420 if ( !Ok() )
1421 {
1422 // no bitmap, no data (raw or otherwise)
1423 return NULL;
1424 }
1425
1426 // if we're already a DIB we can access our data directly, but if not we
1427 // need to convert this DDB to a DIB section and use it for raw access and
1428 // then convert it back
1429 HBITMAP hDIB;
1430 if ( !GetBitmapData()->m_isDIB )
1431 {
1432 wxCHECK_MSG( !GetBitmapData()->m_dib, FALSE,
1433 _T("GetRawData() may be called only once") );
1434
1435 wxDIB *dib = new wxDIB(*this);
1436 if ( !dib->IsOk() )
1437 {
1438 delete dib;
1439
1440 return NULL;
1441 }
1442
1443 // we'll free it in UngetRawData()
1444 GetBitmapData()->m_dib = dib;
1445
1446 hDIB = dib->GetHandle();
1447 }
1448 else // we're a DIB
1449 {
1450 hDIB = GetHbitmap();
1451 }
1452
1453 DIBSECTION ds;
1454 if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) )
1455 {
1456 wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") );
1457
1458 return NULL;
1459 }
1460
1461 // check that the bitmap is in correct format
1462 if ( ds.dsBm.bmBitsPixel != bpp )
1463 {
1464 wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") );
1465
1466 return NULL;
1467 }
1468
1469 // ok, store the relevant info in wxPixelDataBase
1470 const LONG h = ds.dsBm.bmHeight;
1471
1472 data.m_width = ds.dsBm.bmWidth;
1473 data.m_height = h;
1474
1475 // remember that DIBs are stored in top to bottom order!
1476 const LONG bytesPerRow = ds.dsBm.bmWidthBytes;
1477 data.m_stride = -bytesPerRow;
1478
1479 char *bits = (char *)ds.dsBm.bmBits;
1480 if ( h > 1 )
1481 {
1482 bits += (h - 1)*bytesPerRow;
1483 }
1484
1485 return bits;
1486 #else
1487 return NULL;
1488 #endif
1489 }
1490
1491 void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
1492 {
1493 #if wxUSE_WXDIB
1494 if ( !Ok() )
1495 return;
1496
1497 // the cast is ugly but we can't do without it and without making this
1498 // function template (and hence inline) unfortunately
1499 typedef wxPixelData<wxBitmap, wxAlphaPixelFormat> PixelData;
1500 PixelData& data = (PixelData &)dataBase;
1501
1502 if ( !data )
1503 {
1504 // invalid data, don't crash -- but don't assert neither as we're
1505 // called automatically from wxPixelDataBase dtor and so there is no
1506 // way to prevent this from happening
1507 return;
1508 }
1509
1510 if ( GetBitmapData()->m_hasAlpha )
1511 {
1512 // AlphaBlend() wants to have premultiplied source alpha but
1513 // wxRawBitmap API uses normal, not premultiplied, colours, so adjust
1514 // them here now
1515 PixelData::Iterator p(data);
1516
1517 const int w = data.GetWidth();
1518 const int h = data.GetHeight();
1519
1520 for ( int y = 0; y < h; y++ )
1521 {
1522 PixelData::Iterator rowStart = p;
1523
1524 for ( int x = 0; x < w; x++ )
1525 {
1526 const unsigned alpha = p.Alpha();
1527
1528 p.Red() = (p.Red() * alpha + 127) / 255;
1529 p.Blue() = (p.Blue() * alpha + 127) / 255;
1530 p.Green() = (p.Green() * alpha + 127) / 255;
1531
1532 ++p;
1533 }
1534
1535 p = rowStart;
1536 p.OffsetY(data, 1);
1537 }
1538
1539 // if we're a DDB we need to convert DIB back to DDB now to make the
1540 // changes made via raw bitmap access effective
1541 if ( !GetBitmapData()->m_isDIB )
1542 {
1543 wxDIB *dib = GetBitmapData()->m_dib;
1544 GetBitmapData()->m_dib = NULL;
1545
1546 // TODO: convert
1547
1548 delete dib;
1549 }
1550 }
1551 #endif
1552 }
1553 #endif // #ifdef wxHAVE_RAW_BITMAP
1554
1555 // ----------------------------------------------------------------------------
1556 // wxMask
1557 // ----------------------------------------------------------------------------
1558
1559 wxMask::wxMask()
1560 {
1561 m_maskBitmap = 0;
1562 }
1563
1564 // Construct a mask from a bitmap and a colour indicating
1565 // the transparent area
1566 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
1567 {
1568 m_maskBitmap = 0;
1569 Create(bitmap, colour);
1570 }
1571
1572 // Construct a mask from a bitmap and a palette index indicating
1573 // the transparent area
1574 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
1575 {
1576 m_maskBitmap = 0;
1577 Create(bitmap, paletteIndex);
1578 }
1579
1580 // Construct a mask from a mono bitmap (copies the bitmap).
1581 wxMask::wxMask(const wxBitmap& bitmap)
1582 {
1583 m_maskBitmap = 0;
1584 Create(bitmap);
1585 }
1586
1587 wxMask::~wxMask()
1588 {
1589 if ( m_maskBitmap )
1590 ::DeleteObject((HBITMAP) m_maskBitmap);
1591 }
1592
1593 // Create a mask from a mono bitmap (copies the bitmap).
1594 bool wxMask::Create(const wxBitmap& bitmap)
1595 {
1596 #ifndef __WXMICROWIN__
1597 wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
1598 _T("can't create mask from invalid or not monochrome bitmap") );
1599
1600 if ( m_maskBitmap )
1601 {
1602 ::DeleteObject((HBITMAP) m_maskBitmap);
1603 m_maskBitmap = 0;
1604 }
1605
1606 m_maskBitmap = (WXHBITMAP) CreateBitmap(
1607 bitmap.GetWidth(),
1608 bitmap.GetHeight(),
1609 1, 1, 0
1610 );
1611 HDC srcDC = CreateCompatibleDC(0);
1612 SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
1613 HDC destDC = CreateCompatibleDC(0);
1614 SelectObject(destDC, (HBITMAP) m_maskBitmap);
1615 BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
1616 SelectObject(srcDC, 0);
1617 DeleteDC(srcDC);
1618 SelectObject(destDC, 0);
1619 DeleteDC(destDC);
1620 return TRUE;
1621 #else
1622 return FALSE;
1623 #endif
1624 }
1625
1626 // Create a mask from a bitmap and a palette index indicating
1627 // the transparent area
1628 bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
1629 {
1630 if ( m_maskBitmap )
1631 {
1632 ::DeleteObject((HBITMAP) m_maskBitmap);
1633 m_maskBitmap = 0;
1634 }
1635
1636 #if wxUSE_PALETTE
1637 if (bitmap.Ok() && bitmap.GetPalette()->Ok())
1638 {
1639 unsigned char red, green, blue;
1640 if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
1641 {
1642 wxColour transparentColour(red, green, blue);
1643 return Create(bitmap, transparentColour);
1644 }
1645 }
1646 #endif // wxUSE_PALETTE
1647
1648 return FALSE;
1649 }
1650
1651 // Create a mask from a bitmap and a colour indicating
1652 // the transparent area
1653 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1654 {
1655 #ifndef __WXMICROWIN__
1656 wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
1657
1658 if ( m_maskBitmap )
1659 {
1660 ::DeleteObject((HBITMAP) m_maskBitmap);
1661 m_maskBitmap = 0;
1662 }
1663
1664 int width = bitmap.GetWidth(),
1665 height = bitmap.GetHeight();
1666
1667 // scan the bitmap for the transparent colour and set the corresponding
1668 // pixels in the mask to BLACK and the rest to WHITE
1669 COLORREF maskColour = wxColourToPalRGB(colour);
1670 m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
1671
1672 HDC srcDC = ::CreateCompatibleDC(NULL);
1673 HDC destDC = ::CreateCompatibleDC(NULL);
1674 if ( !srcDC || !destDC )
1675 {
1676 wxLogLastError(wxT("CreateCompatibleDC"));
1677 }
1678
1679 bool ok = TRUE;
1680
1681 // SelectObject() will fail
1682 wxASSERT_MSG( !bitmap.GetSelectedInto(),
1683 _T("bitmap can't be selected in another DC") );
1684
1685 HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
1686 if ( !hbmpSrcOld )
1687 {
1688 wxLogLastError(wxT("SelectObject"));
1689
1690 ok = FALSE;
1691 }
1692
1693 HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
1694 if ( !hbmpDstOld )
1695 {
1696 wxLogLastError(wxT("SelectObject"));
1697
1698 ok = FALSE;
1699 }
1700
1701 if ( ok )
1702 {
1703 // this will create a monochrome bitmap with 0 points for the pixels
1704 // which have the same value as the background colour and 1 for the
1705 // others
1706 ::SetBkColor(srcDC, maskColour);
1707 ::BitBlt(destDC, 0, 0, width, height, srcDC, 0, 0, NOTSRCCOPY);
1708 }
1709
1710 ::SelectObject(srcDC, hbmpSrcOld);
1711 ::DeleteDC(srcDC);
1712 ::SelectObject(destDC, hbmpDstOld);
1713 ::DeleteDC(destDC);
1714
1715 return ok;
1716 #else // __WXMICROWIN__
1717 return FALSE;
1718 #endif // __WXMICROWIN__/!__WXMICROWIN__
1719 }
1720
1721 // ----------------------------------------------------------------------------
1722 // wxBitmapHandler
1723 // ----------------------------------------------------------------------------
1724
1725 bool wxBitmapHandler::Create(wxGDIImage *image,
1726 void *data,
1727 long flags,
1728 int width, int height, int depth)
1729 {
1730 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1731
1732 return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
1733 }
1734
1735 bool wxBitmapHandler::Load(wxGDIImage *image,
1736 const wxString& name,
1737 long flags,
1738 int width, int height)
1739 {
1740 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1741
1742 return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
1743 }
1744
1745 bool wxBitmapHandler::Save(wxGDIImage *image,
1746 const wxString& name,
1747 int type)
1748 {
1749 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1750
1751 return bitmap ? SaveFile(bitmap, name, type) : FALSE;
1752 }
1753
1754 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
1755 void *WXUNUSED(data),
1756 long WXUNUSED(type),
1757 int WXUNUSED(width),
1758 int WXUNUSED(height),
1759 int WXUNUSED(depth))
1760 {
1761 return FALSE;
1762 }
1763
1764 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
1765 const wxString& WXUNUSED(name),
1766 long WXUNUSED(type),
1767 int WXUNUSED(desiredWidth),
1768 int WXUNUSED(desiredHeight))
1769 {
1770 return FALSE;
1771 }
1772
1773 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
1774 const wxString& WXUNUSED(name),
1775 int WXUNUSED(type),
1776 const wxPalette *WXUNUSED(palette))
1777 {
1778 return FALSE;
1779 }
1780
1781 // ----------------------------------------------------------------------------
1782 // DIB functions
1783 // ----------------------------------------------------------------------------
1784
1785 #ifndef __WXMICROWIN__
1786 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
1787 HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
1788 {
1789 unsigned long i, headerSize;
1790 LPBITMAPINFO lpDIBheader = NULL;
1791 LPPALETTEENTRY lpPe = NULL;
1792
1793
1794 // Allocate space for a DIB header
1795 headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
1796 lpDIBheader = (BITMAPINFO *) malloc(headerSize);
1797 lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
1798
1799 GetPaletteEntries(hPal, 0, 256, lpPe);
1800
1801 memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
1802
1803 // Fill in the static parts of the DIB header
1804 lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
1805 lpDIBheader->bmiHeader.biWidth = xSize;
1806 lpDIBheader->bmiHeader.biHeight = ySize;
1807 lpDIBheader->bmiHeader.biPlanes = 1;
1808
1809 // this value must be 1, 4, 8 or 24 so PixelDepth can only be
1810 lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
1811 lpDIBheader->bmiHeader.biCompression = BI_RGB;
1812 lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
1813 lpDIBheader->bmiHeader.biClrUsed = 256;
1814
1815
1816 // Initialize the DIB palette
1817 for (i = 0; i < 256; i++) {
1818 lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
1819 lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
1820 lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
1821 lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
1822 }
1823
1824 *lpDIBHeader = lpDIBheader;
1825
1826 return TRUE;
1827 }
1828
1829 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
1830 {
1831 free(lpDIBHeader);
1832 }
1833 #endif
1834
1835 // ----------------------------------------------------------------------------
1836 // global helper functions implemented here
1837 // ----------------------------------------------------------------------------
1838
1839 // helper of wxBitmapToHICON/HCURSOR
1840 static
1841 HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
1842 bool iconWanted,
1843 int hotSpotX,
1844 int hotSpotY)
1845 {
1846 if ( !bmp.Ok() )
1847 {
1848 // we can't create an icon/cursor form nothing
1849 return 0;
1850 }
1851
1852 wxMask *mask = bmp.GetMask();
1853 if ( !mask )
1854 {
1855 // we must have a mask for an icon, so even if it's probably incorrect,
1856 // do create it (grey is the "standard" transparent colour)
1857 mask = new wxMask(bmp, *wxLIGHT_GREY);
1858 }
1859
1860 ICONINFO iconInfo;
1861 iconInfo.fIcon = iconWanted; // do we want an icon or a cursor?
1862 if ( !iconWanted )
1863 {
1864 iconInfo.xHotspot = hotSpotX;
1865 iconInfo.yHotspot = hotSpotY;
1866 }
1867
1868 iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
1869 iconInfo.hbmColor = GetHbitmapOf(bmp);
1870
1871 // black out the transparent area to preserve background colour, because
1872 // Windows blits the original bitmap using SRCINVERT (XOR) after applying
1873 // the mask to the dest rect.
1874 {
1875 MemoryHDC dcSrc, dcDst;
1876 SelectInHDC selectMask(dcSrc, (HBITMAP)mask->GetMaskBitmap()),
1877 selectBitmap(dcDst, iconInfo.hbmColor);
1878
1879 if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(),
1880 dcSrc, 0, 0, SRCAND) )
1881 {
1882 wxLogLastError(_T("BitBlt"));
1883 }
1884 }
1885
1886 HICON hicon = ::CreateIconIndirect(&iconInfo);
1887
1888 if ( !bmp.GetMask() )
1889 {
1890 // we created the mask, now delete it
1891 delete mask;
1892 }
1893
1894 // delete the inverted mask bitmap we created as well
1895 ::DeleteObject(iconInfo.hbmMask);
1896
1897 return hicon;
1898 }
1899
1900 HICON wxBitmapToHICON(const wxBitmap& bmp)
1901 {
1902 return wxBitmapToIconOrCursor(bmp, TRUE, 0, 0);
1903 }
1904
1905 HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY)
1906 {
1907 return (HCURSOR)wxBitmapToIconOrCursor(bmp, FALSE, hotSpotX, hotSpotY);
1908 }
1909
1910 HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
1911 {
1912 #ifndef __WXMICROWIN__
1913 wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
1914
1915 // get width/height from the bitmap if not given
1916 if ( !w || !h )
1917 {
1918 BITMAP bm;
1919 ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
1920 w = bm.bmWidth;
1921 h = bm.bmHeight;
1922 }
1923
1924 HDC hdcSrc = ::CreateCompatibleDC(NULL);
1925 HDC hdcDst = ::CreateCompatibleDC(NULL);
1926 if ( !hdcSrc || !hdcDst )
1927 {
1928 wxLogLastError(wxT("CreateCompatibleDC"));
1929 }
1930
1931 HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
1932 if ( !hbmpInvMask )
1933 {
1934 wxLogLastError(wxT("CreateBitmap"));
1935 }
1936
1937 ::SelectObject(hdcSrc, hbmpMask);
1938 ::SelectObject(hdcDst, hbmpInvMask);
1939 if ( !::BitBlt(hdcDst, 0, 0, w, h,
1940 hdcSrc, 0, 0,
1941 NOTSRCCOPY) )
1942 {
1943 wxLogLastError(wxT("BitBlt"));
1944 }
1945
1946 ::DeleteDC(hdcSrc);
1947 ::DeleteDC(hdcDst);
1948
1949 return hbmpInvMask;
1950 #else
1951 return 0;
1952 #endif
1953 }
wxWidgets (Impactor)