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Fixed label handling (translating for accelerator handling only for relevant
[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 // For compilers that support precompilation, includes "wx.h".
21 #include "wx/wxprec.h"
22
23 #ifdef __BORLANDC__
24 #pragma hdrstop
25 #endif
26
27 #ifndef WX_PRECOMP
28 #include <stdio.h>
29
30 #include "wx/list.h"
31 #include "wx/utils.h"
32 #include "wx/app.h"
33 #include "wx/palette.h"
34 #include "wx/dcmemory.h"
35 #include "wx/bitmap.h"
36 #include "wx/icon.h"
37 #endif
38
39 #include "wx/msw/private.h"
40 #include "wx/log.h"
41
42 #if wxUSE_WXDIB
43 #include "wx/msw/dib.h"
44 #endif
45
46 #include "wx/image.h"
47 #include "wx/xpmdecod.h"
48
49 #ifdef wxHAVE_RAW_BITMAP
50 #include "wx/rawbmp.h"
51 #endif
52
53 // missing from mingw32 header
54 #ifndef CLR_INVALID
55 #define CLR_INVALID ((COLORREF)-1)
56 #endif // no CLR_INVALID
57
58 // ----------------------------------------------------------------------------
59 // Bitmap data
60 // ----------------------------------------------------------------------------
61
62 class WXDLLEXPORT wxBitmapRefData : public wxGDIImageRefData
63 {
64 public:
65 wxBitmapRefData();
66 wxBitmapRefData(const wxBitmapRefData& data);
67 virtual ~wxBitmapRefData() { Free(); }
68
69 virtual void Free();
70
71 // set the mask object to use as the mask, we take ownership of it
72 void SetMask(wxMask *mask)
73 {
74 delete m_bitmapMask;
75 m_bitmapMask = mask;
76 }
77
78 // set the HBITMAP to use as the mask
79 void SetMask(HBITMAP hbmpMask)
80 {
81 SetMask(new wxMask((WXHBITMAP)hbmpMask));
82 }
83
84 // return the mask
85 wxMask *GetMask() const { return m_bitmapMask; }
86
87 public:
88 #if wxUSE_PALETTE
89 wxPalette m_bitmapPalette;
90 #endif // wxUSE_PALETTE
91
92 // MSW-specific
93 // ------------
94
95 #ifdef __WXDEBUG__
96 // this field is solely for error checking: we detect selecting a bitmap
97 // into more than one DC at once or deleting a bitmap still selected into a
98 // DC (both are serious programming errors under Windows)
99 wxDC *m_selectedInto;
100 #endif // __WXDEBUG__
101
102 #if wxUSE_WXDIB
103 // when GetRawData() is called for a DDB we need to convert it to a DIB
104 // first to be able to provide direct access to it and we cache that DIB
105 // here and convert it back to DDB when UngetRawData() is called
106 wxDIB *m_dib;
107 #endif
108
109 // true if we have alpha transparency info and can be drawn using
110 // AlphaBlend()
111 bool m_hasAlpha;
112
113 // true if our HBITMAP is a DIB section, false if it is a DDB
114 bool m_isDIB;
115
116 private:
117 // optional mask for transparent drawing
118 wxMask *m_bitmapMask;
119
120
121 // not implemented
122 wxBitmapRefData& operator=(const wxBitmapRefData&);
123 };
124
125 // ----------------------------------------------------------------------------
126 // macros
127 // ----------------------------------------------------------------------------
128
129 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
130 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
131
132 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
133
134 // ============================================================================
135 // implementation
136 // ============================================================================
137
138 // ----------------------------------------------------------------------------
139 // helper functions
140 // ----------------------------------------------------------------------------
141
142 // decide whether we should create a DIB or a DDB for the given parameters
143 //
144 // NB: we always use DIBs under Windows CE as this is much simpler (even if
145 // also less efficient...) and we obviously can't use them if there is no
146 // DIB support compiled in at all
147 #ifdef __WXWINCE__
148 static inline bool wxShouldCreateDIB(int, int, int, WXHDC) { return true; }
149
150 #define ALWAYS_USE_DIB
151 #elif !wxUSE_WXDIB
152 // no sense in defining wxShouldCreateDIB() as we can't compile code
153 // executed if it is true, so we have to use #if's anyhow
154 #define NEVER_USE_DIB
155 #else // wxUSE_WXDIB && !__WXWINCE__
156 static inline bool wxShouldCreateDIB(int w, int h, int d, WXHDC hdc)
157 {
158 // here is the logic:
159 //
160 // (a) if hdc is specified, the caller explicitly wants DDB
161 // (b) otherwise, create a DIB if depth >= 24 (we don't support 16bpp
162 // or less DIBs anyhow)
163 // (c) finally, create DIBs under Win9x even if the depth hasn't been
164 // explicitly specified but the current display depth is 24 or
165 // more and the image is "big", i.e. > 16Mb which is the
166 // theoretical limit for DDBs under Win9x
167 //
168 // consequences (all of which seem to make sense):
169 //
170 // (i) by default, DDBs are created (depth == -1 usually)
171 // (ii) DIBs can be created by explicitly specifying the depth
172 // (iii) using a DC always forces creating a DDB
173 return !hdc &&
174 (d >= 24 ||
175 (d == -1 &&
176 wxDIB::GetLineSize(w, wxDisplayDepth())*h > 16*1024*1024));
177 }
178
179 #define SOMETIMES_USE_DIB
180 #endif // different DIB usage scenarious
181
182 // ----------------------------------------------------------------------------
183 // wxBitmapRefData
184 // ----------------------------------------------------------------------------
185
186 wxBitmapRefData::wxBitmapRefData()
187 {
188 #ifdef __WXDEBUG__
189 m_selectedInto = NULL;
190 #endif
191 m_bitmapMask = NULL;
192
193 m_hBitmap = (WXHBITMAP) NULL;
194 #if wxUSE_WXDIB
195 m_dib = NULL;
196 #endif
197
198 m_isDIB =
199 m_hasAlpha = false;
200 }
201
202 wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData& data)
203 : wxGDIImageRefData(data)
204 {
205 #ifdef __WXDEBUG__
206 m_selectedInto = NULL;
207 #endif
208
209 // can't copy the mask as the other bitmap destroys it
210 m_bitmapMask = NULL;
211
212 wxASSERT_MSG( !data.m_isDIB,
213 _T("can't copy bitmap locked for raw access!") );
214 m_isDIB = false;
215
216 m_hasAlpha = data.m_hasAlpha;
217 }
218
219 void wxBitmapRefData::Free()
220 {
221 wxASSERT_MSG( !m_selectedInto,
222 wxT("deleting bitmap still selected into wxMemoryDC") );
223
224 #if wxUSE_WXDIB
225 wxASSERT_MSG( !m_dib, _T("forgot to call wxBitmap::UngetRawData()!") );
226 #endif
227
228 if ( m_hBitmap)
229 {
230 if ( !::DeleteObject((HBITMAP)m_hBitmap) )
231 {
232 wxLogLastError(wxT("DeleteObject(hbitmap)"));
233 }
234 }
235
236 delete m_bitmapMask;
237 m_bitmapMask = NULL;
238 }
239
240 // ----------------------------------------------------------------------------
241 // wxBitmap creation
242 // ----------------------------------------------------------------------------
243
244 // this function should be called from all wxBitmap ctors
245 void wxBitmap::Init()
246 {
247 // m_refData = NULL; done in the base class ctor
248 }
249
250 wxGDIImageRefData *wxBitmap::CreateData() const
251 {
252 return new wxBitmapRefData;
253 }
254
255 wxObjectRefData *wxBitmap::CloneRefData(const wxObjectRefData *dataOrig) const
256 {
257 const wxBitmapRefData *
258 data = wx_static_cast(const wxBitmapRefData *, dataOrig);
259 if ( !data )
260 return NULL;
261
262 wxBitmap *self = wx_const_cast(wxBitmap *, this);
263
264 #if wxUSE_WXDIB
265 // copy the other bitmap
266 if ( data->m_hBitmap )
267 {
268 wxDIB dib((HBITMAP)(data->m_hBitmap));
269 self->CopyFromDIB(dib);
270 }
271 else
272 #endif // wxUSE_WXDIB
273 {
274 // don't copy the bitmap data, but do copy the size, depth, ...
275 self->m_refData = new wxBitmapRefData(*data);
276 }
277
278 return m_refData;
279 }
280
281 #ifdef __WIN32__
282
283 bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
284 {
285 #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
286 // it may be either HICON or HCURSOR
287 HICON hicon = (HICON)icon.GetHandle();
288
289 ICONINFO iconInfo;
290 if ( !::GetIconInfo(hicon, &iconInfo) )
291 {
292 wxLogLastError(wxT("GetIconInfo"));
293
294 return false;
295 }
296
297 wxBitmapRefData *refData = new wxBitmapRefData;
298 m_refData = refData;
299
300 int w = icon.GetWidth(),
301 h = icon.GetHeight();
302
303 refData->m_width = w;
304 refData->m_height = h;
305 refData->m_depth = wxDisplayDepth();
306
307 refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
308
309 #if wxUSE_WXDIB
310 // If the icon is 32 bits per pixel then it may have alpha channel data,
311 // although there are some icons that are 32 bpp but have no alpha... So
312 // convert to a DIB and manually check the 4th byte for each pixel.
313 BITMAP bm;
314 if ( ::GetObject(iconInfo.hbmColor, sizeof(BITMAP), (LPVOID)&bm)
315 && bm.bmBitsPixel == 32)
316 {
317 wxDIB dib(iconInfo.hbmColor);
318 if (dib.IsOk())
319 {
320 unsigned char* pixels = dib.GetData();
321 for (int idx=0; idx<w*h*4; idx+=4)
322 {
323 if (pixels[idx+3] != 0)
324 {
325 // If there is an alpha byte that is non-zero then set the
326 // alpha flag and bail out of the loop.
327 refData->m_hasAlpha = true;
328 break;
329 }
330 }
331 }
332 }
333 #endif
334 if ( !refData->m_hasAlpha )
335 {
336 // the mask returned by GetIconInfo() is inverted compared to the usual
337 // wxWin convention
338 refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
339 }
340
341 // delete the old one now as we don't need it any more
342 ::DeleteObject(iconInfo.hbmMask);
343
344 return true;
345 #else
346 wxUnusedVar(icon);
347 return false;
348 #endif
349 }
350
351 #endif // Win32
352
353 bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
354 {
355 UnRef();
356
357 if ( !cursor.Ok() )
358 return false;
359
360 return CopyFromIconOrCursor(cursor);
361 }
362
363 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
364 {
365 UnRef();
366
367 if ( !icon.Ok() )
368 return false;
369
370 return CopyFromIconOrCursor(icon);
371 }
372
373 #ifndef NEVER_USE_DIB
374
375 bool wxBitmap::CopyFromDIB(const wxDIB& dib)
376 {
377 wxCHECK_MSG( dib.IsOk(), false, _T("invalid DIB in CopyFromDIB") );
378
379 #ifdef SOMETIMES_USE_DIB
380 HBITMAP hbitmap = dib.CreateDDB();
381 if ( !hbitmap )
382 return false;
383 #else // ALWAYS_USE_DIB
384 HBITMAP hbitmap = ((wxDIB &)dib).Detach(); // const_cast
385 #endif // SOMETIMES_USE_DIB/ALWAYS_USE_DIB
386
387 UnRef();
388
389 wxBitmapRefData *refData = new wxBitmapRefData;
390 m_refData = refData;
391
392 refData->m_width = dib.GetWidth();
393 refData->m_height = dib.GetHeight();
394 refData->m_depth = dib.GetDepth();
395
396 refData->m_hBitmap = (WXHBITMAP)hbitmap;
397
398 #if wxUSE_PALETTE
399 wxPalette *palette = dib.CreatePalette();
400 if ( palette )
401 {
402 refData->m_bitmapPalette = *palette;
403 }
404
405 delete palette;
406 #endif // wxUSE_PALETTE
407
408 return true;
409 }
410
411 #endif // NEVER_USE_DIB
412
413 wxBitmap::~wxBitmap()
414 {
415 }
416
417 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
418 {
419 Init();
420
421 #ifndef __WXMICROWIN__
422 wxBitmapRefData *refData = new wxBitmapRefData;
423 m_refData = refData;
424
425 refData->m_width = width;
426 refData->m_height = height;
427 refData->m_depth = depth;
428
429 char *data;
430 if ( depth == 1 )
431 {
432 // we assume that it is in XBM format which is not quite the same as
433 // the format CreateBitmap() wants because the order of bytes in the
434 // line is reversed!
435 const size_t bytesPerLine = (width + 7) / 8;
436 const size_t padding = bytesPerLine % 2;
437 const size_t len = height * ( padding + bytesPerLine );
438 data = (char *)malloc(len);
439 const char *src = bits;
440 char *dst = data;
441
442 for ( int rows = 0; rows < height; rows++ )
443 {
444 for ( size_t cols = 0; cols < bytesPerLine; cols++ )
445 {
446 unsigned char val = *src++;
447 unsigned char reversed = 0;
448
449 for ( int bits = 0; bits < 8; bits++)
450 {
451 reversed <<= 1;
452 reversed |= (unsigned char)(val & 0x01);
453 val >>= 1;
454 }
455 *dst++ = reversed;
456 }
457
458 if ( padding )
459 *dst++ = 0;
460 }
461 }
462 else
463 {
464 // bits should already be in Windows standard format
465 data = (char *)bits; // const_cast is harmless
466 }
467
468 HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
469 if ( !hbmp )
470 {
471 wxLogLastError(wxT("CreateBitmap"));
472 }
473
474 if ( data != bits )
475 {
476 free(data);
477 }
478
479 SetHBITMAP((WXHBITMAP)hbmp);
480 #endif
481 }
482
483 // Create from XPM data
484 bool wxBitmap::CreateFromXpm(const char **data)
485 {
486 #if wxUSE_IMAGE && wxUSE_XPM
487 Init();
488
489 wxCHECK_MSG( data != NULL, false, wxT("invalid bitmap data") )
490
491 wxXPMDecoder decoder;
492 wxImage img = decoder.ReadData(data);
493 wxCHECK_MSG( img.Ok(), false, wxT("invalid bitmap data") )
494
495 *this = wxBitmap(img);
496 return true;
497 #else
498 wxUnusedVar(data);
499 return false;
500 #endif
501 }
502
503 wxBitmap::wxBitmap(int w, int h, int d)
504 {
505 Init();
506
507 (void)Create(w, h, d);
508 }
509
510 wxBitmap::wxBitmap(int w, int h, const wxDC& dc)
511 {
512 Init();
513
514 (void)Create(w, h, dc);
515 }
516
517 wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
518 {
519 Init();
520
521 (void)Create(data, type, width, height, depth);
522 }
523
524 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
525 {
526 Init();
527
528 LoadFile(filename, (int)type);
529 }
530
531 bool wxBitmap::Create(int width, int height, int depth)
532 {
533 return DoCreate(width, height, depth, 0);
534 }
535
536 bool wxBitmap::Create(int width, int height, const wxDC& dc)
537 {
538 wxCHECK_MSG( dc.Ok(), false, _T("invalid HDC in wxBitmap::Create()") );
539
540 return DoCreate(width, height, -1, dc.GetHDC());
541 }
542
543 bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc)
544 {
545 UnRef();
546
547 m_refData = new wxBitmapRefData;
548
549 GetBitmapData()->m_width = w;
550 GetBitmapData()->m_height = h;
551
552 HBITMAP hbmp wxDUMMY_INITIALIZE(0);
553
554 #ifndef NEVER_USE_DIB
555 if ( wxShouldCreateDIB(w, h, d, hdc) )
556 {
557 if ( d == -1 )
558 {
559 // create DIBs without alpha channel by default
560 d = 24;
561 }
562
563 wxDIB dib(w, h, d);
564 if ( !dib.IsOk() )
565 return false;
566
567 // don't delete the DIB section in dib object dtor
568 hbmp = dib.Detach();
569
570 GetBitmapData()->m_isDIB = true;
571 GetBitmapData()->m_depth = d;
572 }
573 else // create a DDB
574 #endif // NEVER_USE_DIB
575 {
576 #ifndef ALWAYS_USE_DIB
577 #ifndef __WXMICROWIN__
578 if ( d > 0 )
579 {
580 hbmp = ::CreateBitmap(w, h, 1, d, NULL);
581 if ( !hbmp )
582 {
583 wxLogLastError(wxT("CreateBitmap"));
584 }
585
586 GetBitmapData()->m_depth = d;
587 }
588 else // d == 0, create bitmap compatible with the screen
589 #endif // !__WXMICROWIN__
590 {
591 ScreenHDC dc;
592 hbmp = ::CreateCompatibleBitmap(dc, w, h);
593 if ( !hbmp )
594 {
595 wxLogLastError(wxT("CreateCompatibleBitmap"));
596 }
597
598 GetBitmapData()->m_depth = wxDisplayDepth();
599 }
600 #endif // !ALWAYS_USE_DIB
601 }
602
603 SetHBITMAP((WXHBITMAP)hbmp);
604
605 return Ok();
606 }
607
608 #if wxUSE_IMAGE
609
610 // ----------------------------------------------------------------------------
611 // wxImage to/from conversions for Microwin
612 // ----------------------------------------------------------------------------
613
614 // Microwin versions are so different from normal ones that it really doesn't
615 // make sense to use #ifdefs inside the function bodies
616 #ifdef __WXMICROWIN__
617
618 bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
619 {
620 // Set this to 1 to experiment with mask code,
621 // which currently doesn't work
622 #define USE_MASKS 0
623
624 m_refData = new wxBitmapRefData();
625
626 // Initial attempt at a simple-minded implementation.
627 // The bitmap will always be created at the screen depth,
628 // so the 'depth' argument is ignored.
629
630 HDC hScreenDC = ::GetDC(NULL);
631 int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL);
632
633 HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight());
634 HBITMAP hMaskBitmap = NULL;
635 HBITMAP hOldMaskBitmap = NULL;
636 HDC hMaskDC = NULL;
637 unsigned char maskR = 0;
638 unsigned char maskG = 0;
639 unsigned char maskB = 0;
640
641 // printf("Created bitmap %d\n", (int) hBitmap);
642 if (hBitmap == NULL)
643 {
644 ::ReleaseDC(NULL, hScreenDC);
645 return false;
646 }
647 HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
648
649 HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
650 ::ReleaseDC(NULL, hScreenDC);
651
652 // created an mono-bitmap for the possible mask
653 bool hasMask = image.HasMask();
654
655 if ( hasMask )
656 {
657 #if USE_MASKS
658 // FIXME: we should be able to pass bpp = 1, but
659 // GdBlit can't handle a different depth
660 #if 0
661 hMaskBitmap = ::CreateBitmap( (WORD)image.GetWidth(), (WORD)image.GetHeight(), 1, 1, NULL );
662 #else
663 hMaskBitmap = ::CreateCompatibleBitmap( hMemDC, (WORD)image.GetWidth(), (WORD)image.GetHeight());
664 #endif
665 maskR = image.GetMaskRed();
666 maskG = image.GetMaskGreen();
667 maskB = image.GetMaskBlue();
668
669 if (!hMaskBitmap)
670 {
671 hasMask = false;
672 }
673 else
674 {
675 hScreenDC = ::GetDC(NULL);
676 hMaskDC = ::CreateCompatibleDC(hScreenDC);
677 ::ReleaseDC(NULL, hScreenDC);
678
679 hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap);
680 }
681 #else
682 hasMask = false;
683 #endif
684 }
685
686 int i, j;
687 for (i = 0; i < image.GetWidth(); i++)
688 {
689 for (j = 0; j < image.GetHeight(); j++)
690 {
691 unsigned char red = image.GetRed(i, j);
692 unsigned char green = image.GetGreen(i, j);
693 unsigned char blue = image.GetBlue(i, j);
694
695 ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue));
696
697 if (hasMask)
698 {
699 // scan the bitmap for the transparent colour and set the corresponding
700 // pixels in the mask to BLACK and the rest to WHITE
701 if (maskR == red && maskG == green && maskB == blue)
702 ::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0));
703 else
704 ::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255));
705 }
706 }
707 }
708
709 ::SelectObject(hMemDC, hOldBitmap);
710 ::DeleteDC(hMemDC);
711 if (hasMask)
712 {
713 ::SelectObject(hMaskDC, hOldMaskBitmap);
714 ::DeleteDC(hMaskDC);
715
716 ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap);
717 }
718
719 SetWidth(image.GetWidth());
720 SetHeight(image.GetHeight());
721 SetDepth(screenDepth);
722 SetHBITMAP( (WXHBITMAP) hBitmap );
723
724 #if wxUSE_PALETTE
725 // Copy the palette from the source image
726 SetPalette(image.GetPalette());
727 #endif // wxUSE_PALETTE
728
729 return true;
730 }
731
732 wxImage wxBitmap::ConvertToImage() const
733 {
734 // Initial attempt at a simple-minded implementation.
735 // The bitmap will always be created at the screen depth,
736 // so the 'depth' argument is ignored.
737 // TODO: transparency (create a mask image)
738
739 if (!Ok())
740 {
741 wxFAIL_MSG( wxT("bitmap is invalid") );
742 return wxNullImage;
743 }
744
745 wxImage image;
746
747 wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
748
749 // create an wxImage object
750 int width = GetWidth();
751 int height = GetHeight();
752 image.Create( width, height );
753 unsigned char *data = image.GetData();
754 if( !data )
755 {
756 wxFAIL_MSG( wxT("could not allocate data for image") );
757 return wxNullImage;
758 }
759
760 HDC hScreenDC = ::GetDC(NULL);
761
762 HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
763 ::ReleaseDC(NULL, hScreenDC);
764
765 HBITMAP hBitmap = (HBITMAP) GetHBITMAP();
766
767 HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
768
769 int i, j;
770 for (i = 0; i < GetWidth(); i++)
771 {
772 for (j = 0; j < GetHeight(); j++)
773 {
774 COLORREF color = ::GetPixel(hMemDC, i, j);
775 unsigned char red = GetRValue(color);
776 unsigned char green = GetGValue(color);
777 unsigned char blue = GetBValue(color);
778
779 image.SetRGB(i, j, red, green, blue);
780 }
781 }
782
783 ::SelectObject(hMemDC, hOldBitmap);
784 ::DeleteDC(hMemDC);
785
786 #if wxUSE_PALETTE
787 // Copy the palette from the source image
788 if (GetPalette())
789 image.SetPalette(* GetPalette());
790 #endif // wxUSE_PALETTE
791
792 return image;
793 }
794
795 #endif // __WXMICROWIN__
796
797 // ----------------------------------------------------------------------------
798 // wxImage to/from conversions
799 // ----------------------------------------------------------------------------
800
801 #if wxUSE_WXDIB
802
803 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
804 {
805 return CreateFromImage(image, depth, 0);
806 }
807
808 bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc)
809 {
810 wxCHECK_MSG( dc.Ok(), false,
811 _T("invalid HDC in wxBitmap::CreateFromImage()") );
812
813 return CreateFromImage(image, -1, dc.GetHDC());
814 }
815
816 bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
817 {
818 wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
819
820 UnRef();
821
822 // first convert the image to DIB
823 const int h = image.GetHeight();
824 const int w = image.GetWidth();
825
826 wxDIB dib(image);
827 if ( !dib.IsOk() )
828 return false;
829 if (depth == -1)
830 depth = dib.GetDepth(); // Get depth from image if none specified
831
832 // store the bitmap parameters
833 wxBitmapRefData *refData = new wxBitmapRefData;
834 refData->m_width = w;
835 refData->m_height = h;
836 refData->m_hasAlpha = image.HasAlpha();
837
838 m_refData = refData;
839
840
841 // next either store DIB as is or create a DDB from it
842 HBITMAP hbitmap wxDUMMY_INITIALIZE(0);
843
844 // are we going to use DIB?
845 //
846 // NB: DDBs don't support alpha so if we have alpha channel we must use DIB
847 if ( image.HasAlpha() || wxShouldCreateDIB(w, h, depth, hdc) )
848 {
849 // don't delete the DIB section in dib object dtor
850 hbitmap = dib.Detach();
851
852 refData->m_isDIB = true;
853 refData->m_depth = depth;
854 }
855 #ifndef ALWAYS_USE_DIB
856 else // we need to convert DIB to DDB
857 {
858 hbitmap = dib.CreateDDB((HDC)hdc);
859
860 refData->m_depth = depth;
861 }
862 #endif // !ALWAYS_USE_DIB
863
864 // validate this object
865 SetHBITMAP((WXHBITMAP)hbitmap);
866
867 // finally also set the mask if we have one
868 if ( image.HasMask() )
869 {
870 const size_t len = 2*((w+15)/16);
871 BYTE *src = image.GetData();
872 BYTE *data = new BYTE[h*len];
873 memset(data, 0, h*len);
874 BYTE r = image.GetMaskRed(),
875 g = image.GetMaskGreen(),
876 b = image.GetMaskBlue();
877 BYTE *dst = data;
878 for ( int y = 0; y < h; y++, dst += len )
879 {
880 BYTE *dstLine = dst;
881 BYTE mask = 0x80;
882 for ( int x = 0; x < w; x++, src += 3 )
883 {
884 if (src[0] != r || src[1] != g || src[2] != b)
885 *dstLine |= mask;
886
887 if ( (mask >>= 1) == 0 )
888 {
889 dstLine++;
890 mask = 0x80;
891 }
892 }
893 }
894
895 hbitmap = ::CreateBitmap(w, h, 1, 1, data);
896 if ( !hbitmap )
897 {
898 wxLogLastError(_T("CreateBitmap(mask)"));
899 }
900 else
901 {
902 SetMask(new wxMask((WXHBITMAP)hbitmap));
903 }
904
905 delete[] data;
906 }
907
908 return true;
909 }
910
911 wxImage wxBitmap::ConvertToImage() const
912 {
913 // convert DDB to DIB
914 wxDIB dib(*this);
915
916 if ( !dib.IsOk() )
917 {
918 return wxNullImage;
919 }
920
921 // and then DIB to our wxImage
922 wxImage image = dib.ConvertToImage();
923 if ( !image.Ok() )
924 {
925 return wxNullImage;
926 }
927
928 // now do the same for the mask, if we have any
929 HBITMAP hbmpMask = GetMask() ? (HBITMAP) GetMask()->GetMaskBitmap() : NULL;
930 if ( hbmpMask )
931 {
932 wxDIB dibMask(hbmpMask);
933 if ( dibMask.IsOk() )
934 {
935 // TODO: use wxRawBitmap to iterate over DIB
936
937 // we hard code the mask colour for now but we could also make an
938 // effort (and waste time) to choose a colour not present in the
939 // image already to avoid having to fudge the pixels below --
940 // whether it's worth to do it is unclear however
941 static const int MASK_RED = 1;
942 static const int MASK_GREEN = 2;
943 static const int MASK_BLUE = 3;
944 static const int MASK_BLUE_REPLACEMENT = 2;
945
946 const int h = dibMask.GetHeight();
947 const int w = dibMask.GetWidth();
948 const int bpp = dibMask.GetDepth();
949 const int maskBytesPerPixel = bpp >> 3;
950 const int maskBytesPerLine = wxDIB::GetLineSize(w, bpp);
951 unsigned char *data = image.GetData();
952
953 // remember that DIBs are stored in bottom to top order
954 unsigned char *
955 maskLineStart = dibMask.GetData() + ((h - 1) * maskBytesPerLine);
956
957 for ( int y = 0; y < h; y++, maskLineStart -= maskBytesPerLine )
958 {
959 // traverse one mask DIB line
960 unsigned char *mask = maskLineStart;
961 for ( int x = 0; x < w; x++, mask += maskBytesPerPixel )
962 {
963 // should this pixel be transparent?
964 if ( *mask )
965 {
966 // no, check that it isn't transparent by accident
967 if ( (data[0] == MASK_RED) &&
968 (data[1] == MASK_GREEN) &&
969 (data[2] == MASK_BLUE) )
970 {
971 // we have to fudge the colour a bit to prevent
972 // this pixel from appearing transparent
973 data[2] = MASK_BLUE_REPLACEMENT;
974 }
975
976 data += 3;
977 }
978 else // yes, transparent pixel
979 {
980 *data++ = MASK_RED;
981 *data++ = MASK_GREEN;
982 *data++ = MASK_BLUE;
983 }
984 }
985 }
986
987 image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
988 }
989 }
990
991 return image;
992 }
993
994 #endif // wxUSE_WXDIB
995
996 #endif // wxUSE_IMAGE
997
998 // ----------------------------------------------------------------------------
999 // loading and saving bitmaps
1000 // ----------------------------------------------------------------------------
1001
1002 bool wxBitmap::LoadFile(const wxString& filename, long type)
1003 {
1004 UnRef();
1005
1006 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
1007
1008 if ( handler )
1009 {
1010 m_refData = new wxBitmapRefData;
1011
1012 return handler->LoadFile(this, filename, type, -1, -1);
1013 }
1014 #if wxUSE_IMAGE
1015 else // no bitmap handler found
1016 {
1017 wxImage image;
1018 if ( image.LoadFile( filename, type ) && image.Ok() )
1019 {
1020 *this = wxBitmap(image);
1021
1022 return true;
1023 }
1024 }
1025 #endif // wxUSE_IMAGE
1026
1027 return false;
1028 }
1029
1030 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
1031 {
1032 UnRef();
1033
1034 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
1035
1036 if ( !handler )
1037 {
1038 wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type);
1039
1040 return false;
1041 }
1042
1043 m_refData = new wxBitmapRefData;
1044
1045 return handler->Create(this, data, type, width, height, depth);
1046 }
1047
1048 bool wxBitmap::SaveFile(const wxString& filename,
1049 int type,
1050 const wxPalette *palette)
1051 {
1052 wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
1053
1054 if ( handler )
1055 {
1056 return handler->SaveFile(this, filename, type, palette);
1057 }
1058 #if wxUSE_IMAGE
1059 else // no bitmap handler found
1060 {
1061 // FIXME what about palette? shouldn't we use it?
1062 wxImage image = ConvertToImage();
1063 if ( image.Ok() )
1064 {
1065 return image.SaveFile(filename, type);
1066 }
1067 }
1068 #endif // wxUSE_IMAGE
1069
1070 return false;
1071 }
1072
1073 // ----------------------------------------------------------------------------
1074 // sub bitmap extraction
1075 // ----------------------------------------------------------------------------
1076
1077 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1078 {
1079 wxCHECK_MSG( Ok() &&
1080 (rect.x >= 0) && (rect.y >= 0) &&
1081 (rect.x+rect.width <= GetWidth()) &&
1082 (rect.y+rect.height <= GetHeight()),
1083 wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
1084
1085 wxBitmap ret( rect.width, rect.height, GetDepth() );
1086 wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1087
1088 #ifndef __WXMICROWIN__
1089 // handle alpha channel, if any
1090 if (HasAlpha())
1091 ret.UseAlpha();
1092
1093 // copy bitmap data
1094 MemoryHDC dcSrc,
1095 dcDst;
1096
1097 {
1098 SelectInHDC selectSrc(dcSrc, GetHbitmap()),
1099 selectDst(dcDst, GetHbitmapOf(ret));
1100
1101 if ( !selectSrc || !selectDst )
1102 {
1103 wxLogLastError(_T("SelectObjct(hBitmap)"));
1104 }
1105
1106 if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
1107 dcSrc, rect.x, rect.y, SRCCOPY) )
1108 {
1109 wxLogLastError(_T("BitBlt"));
1110 }
1111 }
1112
1113 // copy mask if there is one
1114 if ( GetMask() )
1115 {
1116 HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
1117
1118 SelectInHDC selectSrc(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()),
1119 selectDst(dcDst, hbmpMask);
1120
1121 if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
1122 dcSrc, rect.x, rect.y, SRCCOPY) )
1123 {
1124 wxLogLastError(_T("BitBlt"));
1125 }
1126
1127 wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
1128 ret.SetMask(mask);
1129 }
1130 #endif // !__WXMICROWIN__
1131
1132 return ret;
1133 }
1134
1135 // ----------------------------------------------------------------------------
1136 // wxBitmap accessors
1137 // ----------------------------------------------------------------------------
1138
1139 #if wxUSE_PALETTE
1140 wxPalette* wxBitmap::GetPalette() const
1141 {
1142 return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette
1143 : (wxPalette *) NULL;
1144 }
1145 #endif
1146
1147 wxMask *wxBitmap::GetMask() const
1148 {
1149 return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL;
1150 }
1151
1152 wxBitmap wxBitmap::GetMaskBitmap() const
1153 {
1154 wxBitmap bmp;
1155 wxMask *mask = GetMask();
1156 if ( mask )
1157 bmp.SetHBITMAP(mask->GetMaskBitmap());
1158 return bmp;
1159 }
1160
1161 #ifdef __WXDEBUG__
1162
1163 wxDC *wxBitmap::GetSelectedInto() const
1164 {
1165 return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL;
1166 }
1167
1168 #endif
1169
1170 #if WXWIN_COMPATIBILITY_2_4
1171
1172 int wxBitmap::GetQuality() const
1173 {
1174 return 0;
1175 }
1176
1177 #endif // WXWIN_COMPATIBILITY_2_4
1178
1179 void wxBitmap::UseAlpha()
1180 {
1181 if ( GetBitmapData() )
1182 GetBitmapData()->m_hasAlpha = true;
1183 }
1184
1185 bool wxBitmap::HasAlpha() const
1186 {
1187 return GetBitmapData() && GetBitmapData()->m_hasAlpha;
1188 }
1189
1190 // ----------------------------------------------------------------------------
1191 // wxBitmap setters
1192 // ----------------------------------------------------------------------------
1193
1194 #ifdef __WXDEBUG__
1195
1196 void wxBitmap::SetSelectedInto(wxDC *dc)
1197 {
1198 if ( GetBitmapData() )
1199 GetBitmapData()->m_selectedInto = dc;
1200 }
1201
1202 #endif
1203
1204 #if wxUSE_PALETTE
1205
1206 void wxBitmap::SetPalette(const wxPalette& palette)
1207 {
1208 AllocExclusive();
1209
1210 GetBitmapData()->m_bitmapPalette = palette;
1211 }
1212
1213 #endif // wxUSE_PALETTE
1214
1215 void wxBitmap::SetMask(wxMask *mask)
1216 {
1217 AllocExclusive();
1218
1219 GetBitmapData()->SetMask(mask);
1220 }
1221
1222 #if WXWIN_COMPATIBILITY_2_4
1223
1224 void wxBitmap::SetQuality(int WXUNUSED(quality))
1225 {
1226 }
1227
1228 #endif // WXWIN_COMPATIBILITY_2_4
1229
1230 // ----------------------------------------------------------------------------
1231 // raw bitmap access support
1232 // ----------------------------------------------------------------------------
1233
1234 #ifdef wxHAVE_RAW_BITMAP
1235 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1236 {
1237 #if wxUSE_WXDIB
1238 if ( !Ok() )
1239 {
1240 // no bitmap, no data (raw or otherwise)
1241 return NULL;
1242 }
1243
1244 // if we're already a DIB we can access our data directly, but if not we
1245 // need to convert this DDB to a DIB section and use it for raw access and
1246 // then convert it back
1247 HBITMAP hDIB;
1248 if ( !GetBitmapData()->m_isDIB )
1249 {
1250 wxCHECK_MSG( !GetBitmapData()->m_dib, NULL,
1251 _T("GetRawData() may be called only once") );
1252
1253 wxDIB *dib = new wxDIB(*this);
1254 if ( !dib->IsOk() )
1255 {
1256 delete dib;
1257
1258 return NULL;
1259 }
1260
1261 // we'll free it in UngetRawData()
1262 GetBitmapData()->m_dib = dib;
1263
1264 hDIB = dib->GetHandle();
1265 }
1266 else // we're a DIB
1267 {
1268 hDIB = GetHbitmap();
1269 }
1270
1271 DIBSECTION ds;
1272 if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) )
1273 {
1274 wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") );
1275
1276 return NULL;
1277 }
1278
1279 // check that the bitmap is in correct format
1280 if ( ds.dsBm.bmBitsPixel != bpp )
1281 {
1282 wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") );
1283
1284 return NULL;
1285 }
1286
1287 // ok, store the relevant info in wxPixelDataBase
1288 const LONG h = ds.dsBm.bmHeight;
1289
1290 data.m_width = ds.dsBm.bmWidth;
1291 data.m_height = h;
1292
1293 // remember that DIBs are stored in top to bottom order!
1294 // (We can't just use ds.dsBm.bmWidthBytes here, because it isn't always a
1295 // multiple of 2, as required by the documentation. So we use the official
1296 // formula, which we already use elsewhere.)
1297 const LONG bytesPerRow =
1298 wxDIB::GetLineSize(ds.dsBm.bmWidth, ds.dsBm.bmBitsPixel);
1299 data.m_stride = -bytesPerRow;
1300
1301 char *bits = (char *)ds.dsBm.bmBits;
1302 if ( h > 1 )
1303 {
1304 bits += (h - 1)*bytesPerRow;
1305 }
1306
1307 return bits;
1308 #else
1309 return NULL;
1310 #endif
1311 }
1312
1313 void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
1314 {
1315 #if wxUSE_WXDIB
1316 if ( !Ok() )
1317 return;
1318
1319 if ( !&dataBase )
1320 {
1321 // invalid data, don't crash -- but don't assert neither as we're
1322 // called automatically from wxPixelDataBase dtor and so there is no
1323 // way to prevent this from happening
1324 return;
1325 }
1326
1327 // if we're a DDB we need to convert DIB back to DDB now to make the
1328 // changes made via raw bitmap access effective
1329 if ( !GetBitmapData()->m_isDIB )
1330 {
1331 wxDIB *dib = GetBitmapData()->m_dib;
1332 GetBitmapData()->m_dib = NULL;
1333
1334 // TODO: convert
1335
1336 delete dib;
1337 }
1338 #endif // wxUSE_WXDIB
1339 }
1340 #endif // #ifdef wxHAVE_RAW_BITMAP
1341
1342 // ----------------------------------------------------------------------------
1343 // wxMask
1344 // ----------------------------------------------------------------------------
1345
1346 wxMask::wxMask()
1347 {
1348 m_maskBitmap = 0;
1349 }
1350
1351 // Construct a mask from a bitmap and a colour indicating
1352 // the transparent area
1353 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
1354 {
1355 m_maskBitmap = 0;
1356 Create(bitmap, colour);
1357 }
1358
1359 // Construct a mask from a bitmap and a palette index indicating
1360 // the transparent area
1361 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
1362 {
1363 m_maskBitmap = 0;
1364 Create(bitmap, paletteIndex);
1365 }
1366
1367 // Construct a mask from a mono bitmap (copies the bitmap).
1368 wxMask::wxMask(const wxBitmap& bitmap)
1369 {
1370 m_maskBitmap = 0;
1371 Create(bitmap);
1372 }
1373
1374 wxMask::~wxMask()
1375 {
1376 if ( m_maskBitmap )
1377 ::DeleteObject((HBITMAP) m_maskBitmap);
1378 }
1379
1380 // Create a mask from a mono bitmap (copies the bitmap).
1381 bool wxMask::Create(const wxBitmap& bitmap)
1382 {
1383 #ifndef __WXMICROWIN__
1384 wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, false,
1385 _T("can't create mask from invalid or not monochrome bitmap") );
1386
1387 if ( m_maskBitmap )
1388 {
1389 ::DeleteObject((HBITMAP) m_maskBitmap);
1390 m_maskBitmap = 0;
1391 }
1392
1393 m_maskBitmap = (WXHBITMAP) CreateBitmap(
1394 bitmap.GetWidth(),
1395 bitmap.GetHeight(),
1396 1, 1, 0
1397 );
1398 HDC srcDC = CreateCompatibleDC(0);
1399 SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
1400 HDC destDC = CreateCompatibleDC(0);
1401 SelectObject(destDC, (HBITMAP) m_maskBitmap);
1402 BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
1403 SelectObject(srcDC, 0);
1404 DeleteDC(srcDC);
1405 SelectObject(destDC, 0);
1406 DeleteDC(destDC);
1407 return true;
1408 #else
1409 wxUnusedVar(bitmap);
1410 return false;
1411 #endif
1412 }
1413
1414 // Create a mask from a bitmap and a palette index indicating
1415 // the transparent area
1416 bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
1417 {
1418 if ( m_maskBitmap )
1419 {
1420 ::DeleteObject((HBITMAP) m_maskBitmap);
1421 m_maskBitmap = 0;
1422 }
1423
1424 #if wxUSE_PALETTE
1425 if (bitmap.Ok() && bitmap.GetPalette()->Ok())
1426 {
1427 unsigned char red, green, blue;
1428 if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
1429 {
1430 wxColour transparentColour(red, green, blue);
1431 return Create(bitmap, transparentColour);
1432 }
1433 }
1434 #endif // wxUSE_PALETTE
1435
1436 return false;
1437 }
1438
1439 // Create a mask from a bitmap and a colour indicating
1440 // the transparent area
1441 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1442 {
1443 #ifndef __WXMICROWIN__
1444 wxCHECK_MSG( bitmap.Ok(), false, _T("invalid bitmap in wxMask::Create") );
1445
1446 if ( m_maskBitmap )
1447 {
1448 ::DeleteObject((HBITMAP) m_maskBitmap);
1449 m_maskBitmap = 0;
1450 }
1451
1452 int width = bitmap.GetWidth(),
1453 height = bitmap.GetHeight();
1454
1455 // scan the bitmap for the transparent colour and set the corresponding
1456 // pixels in the mask to BLACK and the rest to WHITE
1457 COLORREF maskColour = wxColourToPalRGB(colour);
1458 m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
1459
1460 HDC srcDC = ::CreateCompatibleDC(NULL);
1461 HDC destDC = ::CreateCompatibleDC(NULL);
1462 if ( !srcDC || !destDC )
1463 {
1464 wxLogLastError(wxT("CreateCompatibleDC"));
1465 }
1466
1467 bool ok = true;
1468
1469 // SelectObject() will fail
1470 wxASSERT_MSG( !bitmap.GetSelectedInto(),
1471 _T("bitmap can't be selected in another DC") );
1472
1473 HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
1474 if ( !hbmpSrcOld )
1475 {
1476 wxLogLastError(wxT("SelectObject"));
1477
1478 ok = false;
1479 }
1480
1481 HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
1482 if ( !hbmpDstOld )
1483 {
1484 wxLogLastError(wxT("SelectObject"));
1485
1486 ok = false;
1487 }
1488
1489 if ( ok )
1490 {
1491 // this will create a monochrome bitmap with 0 points for the pixels
1492 // which have the same value as the background colour and 1 for the
1493 // others
1494 ::SetBkColor(srcDC, maskColour);
1495 ::BitBlt(destDC, 0, 0, width, height, srcDC, 0, 0, NOTSRCCOPY);
1496 }
1497
1498 ::SelectObject(srcDC, hbmpSrcOld);
1499 ::DeleteDC(srcDC);
1500 ::SelectObject(destDC, hbmpDstOld);
1501 ::DeleteDC(destDC);
1502
1503 return ok;
1504 #else // __WXMICROWIN__
1505 wxUnusedVar(bitmap);
1506 wxUnusedVar(colour);
1507 return false;
1508 #endif // __WXMICROWIN__/!__WXMICROWIN__
1509 }
1510
1511 // ----------------------------------------------------------------------------
1512 // wxBitmapHandler
1513 // ----------------------------------------------------------------------------
1514
1515 bool wxBitmapHandler::Create(wxGDIImage *image,
1516 void *data,
1517 long flags,
1518 int width, int height, int depth)
1519 {
1520 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1521
1522 return bitmap ? Create(bitmap, data, flags, width, height, depth) : false;
1523 }
1524
1525 bool wxBitmapHandler::Load(wxGDIImage *image,
1526 const wxString& name,
1527 long flags,
1528 int width, int height)
1529 {
1530 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1531
1532 return bitmap ? LoadFile(bitmap, name, flags, width, height) : false;
1533 }
1534
1535 bool wxBitmapHandler::Save(wxGDIImage *image,
1536 const wxString& name,
1537 int type)
1538 {
1539 wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1540
1541 return bitmap ? SaveFile(bitmap, name, type) : false;
1542 }
1543
1544 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
1545 void *WXUNUSED(data),
1546 long WXUNUSED(type),
1547 int WXUNUSED(width),
1548 int WXUNUSED(height),
1549 int WXUNUSED(depth))
1550 {
1551 return false;
1552 }
1553
1554 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
1555 const wxString& WXUNUSED(name),
1556 long WXUNUSED(type),
1557 int WXUNUSED(desiredWidth),
1558 int WXUNUSED(desiredHeight))
1559 {
1560 return false;
1561 }
1562
1563 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
1564 const wxString& WXUNUSED(name),
1565 int WXUNUSED(type),
1566 const wxPalette *WXUNUSED(palette))
1567 {
1568 return false;
1569 }
1570
1571 // ----------------------------------------------------------------------------
1572 // DIB functions
1573 // ----------------------------------------------------------------------------
1574
1575 #ifndef __WXMICROWIN__
1576 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
1577 HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
1578 {
1579 unsigned long i, headerSize;
1580
1581 // Allocate space for a DIB header
1582 headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
1583 LPBITMAPINFO lpDIBheader = (BITMAPINFO *) malloc(headerSize);
1584 LPPALETTEENTRY lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
1585
1586 GetPaletteEntries(hPal, 0, 256, lpPe);
1587
1588 memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
1589
1590 // Fill in the static parts of the DIB header
1591 lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
1592 lpDIBheader->bmiHeader.biWidth = xSize;
1593 lpDIBheader->bmiHeader.biHeight = ySize;
1594 lpDIBheader->bmiHeader.biPlanes = 1;
1595
1596 // this value must be 1, 4, 8 or 24 so PixelDepth can only be
1597 lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
1598 lpDIBheader->bmiHeader.biCompression = BI_RGB;
1599 lpDIBheader->bmiHeader.biSizeImage = (xSize * abs(ySize) * bitsPerPixel) >> 3;
1600 lpDIBheader->bmiHeader.biClrUsed = 256;
1601
1602
1603 // Initialize the DIB palette
1604 for (i = 0; i < 256; i++) {
1605 lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
1606 lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
1607 lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
1608 lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
1609 }
1610
1611 *lpDIBHeader = lpDIBheader;
1612
1613 return true;
1614 }
1615
1616 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
1617 {
1618 free(lpDIBHeader);
1619 }
1620 #endif
1621
1622 // ----------------------------------------------------------------------------
1623 // global helper functions implemented here
1624 // ----------------------------------------------------------------------------
1625
1626 // helper of wxBitmapToHICON/HCURSOR
1627 static
1628 HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
1629 bool iconWanted,
1630 int hotSpotX,
1631 int hotSpotY)
1632 {
1633 if ( !bmp.Ok() )
1634 {
1635 // we can't create an icon/cursor form nothing
1636 return 0;
1637 }
1638
1639 wxMask* mask;
1640 wxBitmap newbmp;
1641 if ( bmp.HasAlpha() )
1642 {
1643 // Convert alpha to a mask. NOTE: It would be better to actually put
1644 // the alpha into the icon instead of making a mask, but I don't have
1645 // time to figure that out today.
1646 wxImage img = bmp.ConvertToImage();
1647 img.ConvertAlphaToMask();
1648 newbmp = wxBitmap(img);
1649 mask = newbmp.GetMask();
1650 }
1651 else
1652 {
1653 mask = bmp.GetMask();
1654 }
1655
1656 if ( !mask )
1657 {
1658 // we must have a mask for an icon, so even if it's probably incorrect,
1659 // do create it (grey is the "standard" transparent colour)
1660 mask = new wxMask(bmp, *wxLIGHT_GREY);
1661 }
1662
1663 ICONINFO iconInfo;
1664 wxZeroMemory(iconInfo);
1665 iconInfo.fIcon = iconWanted; // do we want an icon or a cursor?
1666 if ( !iconWanted )
1667 {
1668 iconInfo.xHotspot = hotSpotX;
1669 iconInfo.yHotspot = hotSpotY;
1670 }
1671
1672 iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
1673 iconInfo.hbmColor = GetHbitmapOf(bmp);
1674
1675 // black out the transparent area to preserve background colour, because
1676 // Windows blits the original bitmap using SRCINVERT (XOR) after applying
1677 // the mask to the dest rect.
1678 {
1679 MemoryHDC dcSrc, dcDst;
1680 SelectInHDC selectMask(dcSrc, (HBITMAP)mask->GetMaskBitmap()),
1681 selectBitmap(dcDst, iconInfo.hbmColor);
1682
1683 if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(),
1684 dcSrc, 0, 0, SRCAND) )
1685 {
1686 wxLogLastError(_T("BitBlt"));
1687 }
1688 }
1689
1690 HICON hicon = ::CreateIconIndirect(&iconInfo);
1691
1692 if ( !bmp.GetMask() && !bmp.HasAlpha() )
1693 {
1694 // we created the mask, now delete it
1695 delete mask;
1696 }
1697
1698 // delete the inverted mask bitmap we created as well
1699 ::DeleteObject(iconInfo.hbmMask);
1700
1701 return hicon;
1702 }
1703
1704 HICON wxBitmapToHICON(const wxBitmap& bmp)
1705 {
1706 return wxBitmapToIconOrCursor(bmp, true, 0, 0);
1707 }
1708
1709 HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY)
1710 {
1711 return (HCURSOR)wxBitmapToIconOrCursor(bmp, false, hotSpotX, hotSpotY);
1712 }
1713
1714 HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
1715 {
1716 #ifndef __WXMICROWIN__
1717 wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
1718
1719 // get width/height from the bitmap if not given
1720 if ( !w || !h )
1721 {
1722 BITMAP bm;
1723 ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
1724 w = bm.bmWidth;
1725 h = bm.bmHeight;
1726 }
1727
1728 HDC hdcSrc = ::CreateCompatibleDC(NULL);
1729 HDC hdcDst = ::CreateCompatibleDC(NULL);
1730 if ( !hdcSrc || !hdcDst )
1731 {
1732 wxLogLastError(wxT("CreateCompatibleDC"));
1733 }
1734
1735 HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
1736 if ( !hbmpInvMask )
1737 {
1738 wxLogLastError(wxT("CreateBitmap"));
1739 }
1740
1741 HGDIOBJ srcTmp = ::SelectObject(hdcSrc, hbmpMask);
1742 HGDIOBJ dstTmp = ::SelectObject(hdcDst, hbmpInvMask);
1743 if ( !::BitBlt(hdcDst, 0, 0, w, h,
1744 hdcSrc, 0, 0,
1745 NOTSRCCOPY) )
1746 {
1747 wxLogLastError(wxT("BitBlt"));
1748 }
1749
1750 // Deselect objects
1751 SelectObject(hdcSrc,srcTmp);
1752 SelectObject(hdcDst,dstTmp);
1753
1754 ::DeleteDC(hdcSrc);
1755 ::DeleteDC(hdcDst);
1756
1757 return hbmpInvMask;
1758 #else
1759 return 0;
1760 #endif
1761 }
wxWidgets (Impactor)