1797 lines
49 KiB
C++
1797 lines
49 KiB
C++
////////////////////////////////////////////////////////////////////////////
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// Name: src/msw/bitmap.cpp
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// Purpose: wxBitmap
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// Author: Julian Smart
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// Modified by:
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// Created: 04/01/98
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#include "wx/bitmap.h"
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#ifndef WX_PRECOMP
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#include <stdio.h>
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#include "wx/list.h"
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#include "wx/utils.h"
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#include "wx/app.h"
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#include "wx/palette.h"
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#include "wx/dcmemory.h"
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#include "wx/icon.h"
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#include "wx/log.h"
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#include "wx/image.h"
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#endif
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#include "wx/scopedptr.h"
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#include "wx/msw/private.h"
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#include "wx/msw/dc.h"
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#if wxUSE_WXDIB
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#include "wx/msw/dib.h"
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#endif
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#ifdef wxHAS_RAW_BITMAP
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#include "wx/rawbmp.h"
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#endif
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// missing from mingw32 header
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#ifndef CLR_INVALID
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#define CLR_INVALID ((COLORREF)-1)
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#endif // no CLR_INVALID
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// ROP which doesn't have standard name
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#define DSTERASE 0x00220326 // dest = (NOT src) AND dest
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// ----------------------------------------------------------------------------
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// wxBitmapRefData
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxBitmapRefData : public wxGDIImageRefData
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{
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public:
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wxBitmapRefData() { Init(); }
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wxBitmapRefData(const wxBitmapRefData& data);
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virtual ~wxBitmapRefData() { Free(); }
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virtual void Free();
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#if wxUSE_WXDIB
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// Creates a new bitmap (DDB or DIB) from the contents of the given DIB.
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void CopyFromDIB(const wxDIB& dib);
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// Takes ownership of the given DIB.
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bool AssignDIB(wxDIB& dib);
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// Also takes ownership of the given DIB, but doesn't change any other
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// fields (which are supposed to be already set), and just updates
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// m_hasAlpha because 32 bit DIBs always do have it.
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void Set32bppHDIB(HBITMAP hdib);
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#endif // wxUSE_WXDIB
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// set the mask object to use as the mask, we take ownership of it
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void SetMask(wxMask *mask)
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{
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delete m_bitmapMask;
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m_bitmapMask = mask;
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}
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// set the HBITMAP to use as the mask
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void SetMask(HBITMAP hbmpMask)
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{
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SetMask(new wxMask((WXHBITMAP)hbmpMask));
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}
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// return the mask
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wxMask *GetMask() const { return m_bitmapMask; }
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public:
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#if wxUSE_PALETTE
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wxPalette m_bitmapPalette;
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#endif // wxUSE_PALETTE
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// MSW-specific
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// ------------
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#if wxDEBUG_LEVEL
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// this field is solely for error checking: we detect selecting a bitmap
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// into more than one DC at once or deleting a bitmap still selected into a
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// DC (both are serious programming errors under Windows)
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wxDC *m_selectedInto;
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#endif // wxDEBUG_LEVEL
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#if wxUSE_WXDIB
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// when GetRawData() is called for a DDB we need to convert it to a DIB
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// first to be able to provide direct access to it and we cache that DIB
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// here and convert it back to DDB when UngetRawData() is called
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wxDIB *m_dib;
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#endif
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// true if we have alpha transparency info and can be drawn using
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// AlphaBlend()
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bool m_hasAlpha;
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// true if our HBITMAP is a DIB section, false if it is a DDB
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bool m_isDIB;
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private:
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void Init();
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#if wxUSE_WXDIB
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// Initialize using the given DIB but use (and take ownership of) the
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// bitmap handle if it is valid, assuming it's a DDB. If it's not valid,
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// use the DIB handle itself taking ownership of it (i.e. wxDIB will become
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// invalid when this function returns even though we take it as const
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// reference because this is how it's passed to us).
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void InitFromDIB(const wxDIB& dib, HBITMAP hbitmap = NULL);
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#endif // wxUSE_WXDIB
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// optional mask for transparent drawing
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wxMask *m_bitmapMask;
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// not implemented
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wxBitmapRefData& operator=(const wxBitmapRefData&);
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};
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// ----------------------------------------------------------------------------
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// macros
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// ----------------------------------------------------------------------------
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wxIMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject);
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wxIMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject);
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wxIMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject);
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// helper functions
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// ----------------------------------------------------------------------------
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// decide whether we should create a DIB or a DDB for the given parameters
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#if wxUSE_WXDIB
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static inline bool wxShouldCreateDIB(int w, int h, int d, WXHDC hdc)
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{
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// here is the logic:
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//
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// (a) if hdc is specified, the caller explicitly wants DDB
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// (b) otherwise, create a DIB if depth >= 24 (we don't support 16bpp
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// or less DIBs anyhow)
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// (c) finally, create DIBs under MSW even if the depth hasn't been
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// explicitly specified but the current display depth is 24 or
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// more and the image is "big", i.e. > 16Mb
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//
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// consequences (all of which seem to make sense):
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//
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// (i) by default, DDBs are created (depth == -1 usually)
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// (ii) DIBs can be created by explicitly specifying the depth
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// (iii) using a DC always forces creating a DDB
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return !hdc &&
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(d >= 24 ||
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(d == -1 &&
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wxDIB::GetLineSize(w, wxDisplayDepth())*h > 16*1024*1024));
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}
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#define SOMETIMES_USE_DIB
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#else // !wxUSE_WXDIB
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// no sense in defining wxShouldCreateDIB() as we can't compile code
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// executed if it is true, so we have to use #if's anyhow
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#define NEVER_USE_DIB
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#endif // different DIB usage scenarious
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// ----------------------------------------------------------------------------
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// wxBitmapRefData
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// ----------------------------------------------------------------------------
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void wxBitmapRefData::Init()
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{
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#if wxDEBUG_LEVEL
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m_selectedInto = NULL;
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#endif
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m_bitmapMask = NULL;
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m_hBitmap = (WXHBITMAP) NULL;
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#if wxUSE_WXDIB
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m_dib = NULL;
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#endif
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m_isDIB =
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m_hasAlpha = false;
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}
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wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData& data)
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: wxGDIImageRefData(data)
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{
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Init();
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// (deep) copy the mask if present
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if (data.m_bitmapMask)
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m_bitmapMask = new wxMask(*data.m_bitmapMask);
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#if wxUSE_WXDIB
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wxASSERT_MSG( !data.m_dib,
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wxT("can't copy bitmap locked for raw access!") );
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#endif // wxUSE_WXDIB
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m_hasAlpha = data.m_hasAlpha;
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#if wxUSE_WXDIB
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// copy the other bitmap
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if ( data.m_hBitmap )
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{
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wxDIB dib((HBITMAP)(data.m_hBitmap));
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CopyFromDIB(dib);
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BITMAP bm;
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if ( ::GetObject(m_hBitmap, sizeof(bm), &bm) != sizeof(bm) )
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{
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wxLogLastError(wxT("GetObject(hBitmap@wxBitmapRefData)"));
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}
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else if ( m_depth != bm.bmBitsPixel )
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{
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// We got DDB with a different colour depth then we wanted, so we
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// can't use it and need to continue using the DIB instead.
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wxDIB dibDst(m_width, m_height, m_depth);
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if ( dibDst.IsOk() )
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{
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memcpy(dibDst.GetData(), dib.GetData(),
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wxDIB::GetLineSize(m_width, m_depth)*m_height);
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AssignDIB(dibDst);
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}
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else
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{
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// Nothing else left to do...
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m_depth = bm.bmBitsPixel;
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}
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}
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}
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#endif // wxUSE_WXDIB
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}
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void wxBitmapRefData::Free()
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{
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wxASSERT_MSG( !m_selectedInto,
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wxT("deleting bitmap still selected into wxMemoryDC") );
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#if wxUSE_WXDIB
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wxASSERT_MSG( !m_dib, wxT("forgot to call wxBitmap::UngetRawData()!") );
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#endif
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if ( m_hBitmap)
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{
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if ( !::DeleteObject((HBITMAP)m_hBitmap) )
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{
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wxLogLastError(wxT("DeleteObject(hbitmap)"));
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}
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m_hBitmap = 0;
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}
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wxDELETE(m_bitmapMask);
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}
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#if wxUSE_WXDIB
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void wxBitmapRefData::InitFromDIB(const wxDIB& dib, HBITMAP hbitmap)
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{
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m_width = dib.GetWidth();
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m_height = dib.GetHeight();
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m_depth = dib.GetDepth();
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#if wxUSE_PALETTE
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wxPalette *palette = dib.CreatePalette();
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if ( palette )
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m_bitmapPalette = *palette;
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delete palette;
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#endif // wxUSE_PALETTE
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if ( hbitmap )
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{
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// We assume it's a DDB, otherwise there would be no point in passing
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// it to us in addition to the DIB.
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m_isDIB = false;
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}
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else // No valid DDB provided
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{
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// Just use DIB itself.
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m_isDIB = true;
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// Notice that we must not try to use the DIB after calling Detach() on
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// it, e.g. this must be done after calling CreatePalette() above.
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hbitmap = const_cast<wxDIB &>(dib).Detach();
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}
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// In any case, take ownership of this bitmap.
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m_hBitmap = (WXHBITMAP)hbitmap;
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}
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void wxBitmapRefData::CopyFromDIB(const wxDIB& dib)
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{
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wxCHECK_RET( !IsOk(), "bitmap already initialized" );
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wxCHECK_RET( dib.IsOk(), wxT("invalid DIB in CopyFromDIB") );
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HBITMAP hbitmap;
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#ifdef SOMETIMES_USE_DIB
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hbitmap = dib.CreateDDB();
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#else // ALWAYS_USE_DIB
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hbitmap = NULL;
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#endif // SOMETIMES_USE_DIB/ALWAYS_USE_DIB
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InitFromDIB(dib, hbitmap);
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}
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bool wxBitmapRefData::AssignDIB(wxDIB& dib)
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{
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if ( !dib.IsOk() )
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return false;
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Free();
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InitFromDIB(dib);
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return true;
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}
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void wxBitmapRefData::Set32bppHDIB(HBITMAP hdib)
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{
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Free();
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m_isDIB = true;
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m_hasAlpha = true;
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m_hBitmap = hdib;
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}
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#endif // wxUSE_WXDIB
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// ----------------------------------------------------------------------------
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// wxBitmap creation
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// ----------------------------------------------------------------------------
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wxGDIImageRefData *wxBitmap::CreateData() const
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{
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return new wxBitmapRefData;
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}
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wxGDIRefData *wxBitmap::CloneGDIRefData(const wxGDIRefData *data) const
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{
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return new wxBitmapRefData(*static_cast<const wxBitmapRefData *>(data));
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}
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#if wxUSE_WXDIB
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// Premultiply the values of all RGBA pixels in the given range.
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static void PremultiplyPixels(unsigned char* begin, unsigned char* end)
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{
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for ( unsigned char* pixels = begin; pixels < end; pixels += 4 )
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{
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const unsigned char a = pixels[3];
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pixels[0] = ((pixels[0]*a) + 127)/255;
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pixels[1] = ((pixels[1]*a) + 127)/255;
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pixels[2] = ((pixels[2]*a) + 127)/255;
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}
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}
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// Helper which examines the alpha channel for any non-0 values and also
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// possibly returns the DIB with premultiplied values if it does have alpha
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// (i.e. this DIB is only filled if the function returns true).
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//
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// The function semantics is complicated but necessary to avoid converting to
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// DIB twice, which is expensive for large bitmaps, yet avoid code duplication
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// between CopyFromIconOrCursor() and MSWUpdateAlpha().
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static bool CheckAlpha(HBITMAP hbmp, HBITMAP* hdib = NULL)
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{
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BITMAP bm;
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if ( !::GetObject(hbmp, sizeof(bm), &bm) || (bm.bmBitsPixel != 32) )
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return false;
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wxDIB dib(hbmp);
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if ( !dib.IsOk() )
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return false;
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unsigned char* pixels = dib.GetData();
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unsigned char* const end = pixels + 4*dib.GetWidth()*dib.GetHeight();
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for ( ; pixels < end; pixels += 4 )
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{
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if ( pixels[3] != 0 )
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{
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if ( hdib )
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{
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// If we do have alpha, ensure we use premultiplied data for
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// our pixels as this is what the bitmaps created in other ways
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// do and this is necessary for e.g. AlphaBlend() to work with
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// this bitmap.
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PremultiplyPixels(dib.GetData(), end);
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*hdib = dib.Detach();
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}
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return true;
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}
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}
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return false;
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}
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// Return HDIB containing premultiplied bitmap data if the original bitmap is
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// not premultiplied, otherwise return NULL.
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//
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// Semantics is a bit weird here again because we want to avoid throwing the
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// wxDIB we create here away if possible.
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//
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// Also notice that this function uses a heuristics for determining whether the
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// original bitmap uses premultiplied alpha or not and can return NULL for some
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// bitmaps not using premultiplied alpha. And while this should be relatively
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// rare in practice, we really ought to allow the user to specify this
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// explicitly.
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static HBITMAP CreatePremultipliedDIBIfNeeded(HBITMAP hbmp)
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{
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// Check if 32-bit bitmap realy has premultiplied RGB data
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// and premuliply it if necessary.
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BITMAP bm;
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if ( !::GetObject(hbmp, sizeof(bm), &bm) || (bm.bmBitsPixel != 32) )
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return NULL;
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wxDIB dib(hbmp);
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if ( !dib.IsOk() )
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return NULL;
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unsigned char* pixels = dib.GetData();
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unsigned char* const end = pixels + 4*dib.GetWidth()*dib.GetHeight();
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for ( ; pixels < end; pixels += 4 )
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{
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const unsigned char a = pixels[3];
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if ( a > 0 && (pixels[0] > a || pixels[1] > a || pixels[2] > a) )
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{
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// Data is certainly not premultiplied by alpha if any of the
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// values is smaller than the value of alpha itself.
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PremultiplyPixels(dib.GetData(), end);
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return dib.Detach();
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}
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}
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return NULL;
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}
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#endif // wxUSE_WXDIB
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bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon,
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wxBitmapTransparency transp)
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{
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// it may be either HICON or HCURSOR
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HICON hicon = (HICON)icon.GetHandle();
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AutoIconInfo iconInfo;
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if ( !iconInfo.GetFrom(hicon) )
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return false;
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wxBitmapRefData *refData = new wxBitmapRefData;
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m_refData = refData;
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int w = icon.GetWidth(),
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h = icon.GetHeight();
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if ( iconInfo.hbmColor )
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{
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refData->m_width = w;
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refData->m_height = h;
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refData->m_depth = wxDisplayDepth();
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refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
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// Reset this field to prevent it from being destroyed by AutoIconInfo,
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// we took ownership of it.
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iconInfo.hbmColor = 0;
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}
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else // we only have monochrome icon/cursor
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{
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// For monochrome icons/cursor bitmap mask is of height 2*h
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// and contains both AND and XOR masks.
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// AND mask: 0 <= y <= h-1
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// XOR mask: h <= y <= 2*h-1
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// First we need to extract and store XOR mask from this bitmap.
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HBITMAP hbmp = ::CreateBitmap(w, h, 1, wxDisplayDepth(), NULL);
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if ( !hbmp )
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{
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wxLogLastError(wxT("wxBitmap::CopyFromIconOrCursor - CreateBitmap"));
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}
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else
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{
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MemoryHDC dcSrc;
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MemoryHDC dcDst;
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SelectInHDC selSrc(dcSrc, iconInfo.hbmMask);
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SelectInHDC selDst(dcDst, hbmp);
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if ( !::BitBlt((HDC)dcDst, 0, 0, w, h,
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(HDC)dcSrc, 0, h,
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SRCCOPY) )
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{
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wxLogLastError(wxT("wxBitmap::CopyFromIconOrCursor - BitBlt"));
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}
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// Prepare the AND mask to be compatible with wxBitmap mask
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// by seting its bits to 0 wherever XOR mask (image) bits are set to 1.
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// This is done in-place by applying the following ROP:
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// dest = dest AND (NOT src) where dest=AND mask, src=XOR mask
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//
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// AND mask will be extracted later at creation of inverted mask.
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if ( !::BitBlt((HDC)dcSrc, 0, 0, w, h,
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(HDC)dcSrc, 0, h,
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DSTERASE) )
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{
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wxLogLastError(wxT("wxBitmap::CopyFromIconOrCursor - BitBlt"));
|
|
}
|
|
}
|
|
refData->m_width = w;
|
|
refData->m_height = h;
|
|
refData->m_depth = wxDisplayDepth();
|
|
refData->m_hBitmap = hbmp;
|
|
}
|
|
|
|
switch ( transp )
|
|
{
|
|
default:
|
|
wxFAIL_MSG( wxT("unknown wxBitmapTransparency value") );
|
|
|
|
case wxBitmapTransparency_None:
|
|
// nothing to do, refData->m_hasAlpha is false by default
|
|
break;
|
|
|
|
case wxBitmapTransparency_Auto:
|
|
#if wxUSE_WXDIB
|
|
// If the icon is 32 bits per pixel then it may have alpha channel
|
|
// data, although there are some icons that are 32 bpp but have no
|
|
// alpha, so check for this.
|
|
{
|
|
HBITMAP hdib = 0;
|
|
if ( CheckAlpha(refData->m_hBitmap, &hdib) )
|
|
refData->Set32bppHDIB(hdib);
|
|
}
|
|
break;
|
|
#endif // wxUSE_WXDIB
|
|
|
|
case wxBitmapTransparency_Always:
|
|
refData->m_hasAlpha = true;
|
|
break;
|
|
}
|
|
|
|
if ( !refData->m_hasAlpha )
|
|
{
|
|
// the mask returned by GetIconInfo() is inverted compared to the usual
|
|
// wxWin convention
|
|
refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool wxBitmap::CopyFromCursor(const wxCursor& cursor, wxBitmapTransparency transp)
|
|
{
|
|
UnRef();
|
|
|
|
if ( !cursor.IsOk() )
|
|
return false;
|
|
|
|
return CopyFromIconOrCursor(cursor, transp);
|
|
}
|
|
|
|
bool wxBitmap::CopyFromIcon(const wxIcon& icon, wxBitmapTransparency transp)
|
|
{
|
|
UnRef();
|
|
|
|
if ( !icon.IsOk() )
|
|
return false;
|
|
|
|
return CopyFromIconOrCursor(icon, transp);
|
|
}
|
|
|
|
#if wxUSE_WXDIB
|
|
|
|
bool wxBitmap::CopyFromDIB(const wxDIB& dib)
|
|
{
|
|
wxScopedPtr<wxBitmapRefData> newData(new wxBitmapRefData);
|
|
newData->CopyFromDIB(dib);
|
|
if ( !newData->IsOk() )
|
|
return false;
|
|
|
|
UnRef();
|
|
m_refData = newData.release();
|
|
return true;
|
|
}
|
|
|
|
bool wxBitmap::IsDIB() const
|
|
{
|
|
return GetBitmapData() && GetBitmapData()->m_isDIB;
|
|
}
|
|
|
|
bool wxBitmap::ConvertToDIB()
|
|
{
|
|
if ( IsDIB() )
|
|
return true;
|
|
|
|
wxDIB dib(*this);
|
|
if ( !dib.IsOk() )
|
|
return false;
|
|
|
|
// It is important to reuse the current GetBitmapData() instead of creating
|
|
// a new one, as our object identity shouldn't change just because our
|
|
// internal representation did, but IsSameAs() compares data pointers.
|
|
return GetBitmapData()->AssignDIB(dib);
|
|
}
|
|
|
|
#endif // wxUSE_WXDIB
|
|
|
|
wxBitmap::~wxBitmap()
|
|
{
|
|
}
|
|
|
|
wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
|
|
{
|
|
wxBitmapRefData *refData = new wxBitmapRefData;
|
|
m_refData = refData;
|
|
|
|
refData->m_width = width;
|
|
refData->m_height = height;
|
|
refData->m_depth = depth;
|
|
|
|
char *data;
|
|
if ( depth == 1 )
|
|
{
|
|
// we assume that it is in XBM format which is not quite the same as
|
|
// the format CreateBitmap() wants because the order of bytes in the
|
|
// line is reversed!
|
|
const size_t bytesPerLine = (width + 7) / 8;
|
|
const size_t padding = bytesPerLine % 2;
|
|
const size_t len = height * ( padding + bytesPerLine );
|
|
data = (char *)malloc(len);
|
|
const char *src = bits;
|
|
char *dst = data;
|
|
|
|
for ( int rows = 0; rows < height; rows++ )
|
|
{
|
|
for ( size_t cols = 0; cols < bytesPerLine; cols++ )
|
|
{
|
|
unsigned char val = *src++;
|
|
unsigned char reversed = 0;
|
|
|
|
for ( int bit = 0; bit < 8; bit++)
|
|
{
|
|
reversed <<= 1;
|
|
reversed |= (unsigned char)(val & 0x01);
|
|
val >>= 1;
|
|
}
|
|
*dst++ = ~reversed;
|
|
}
|
|
|
|
if ( padding )
|
|
*dst++ = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// bits should already be in Windows standard format
|
|
data = const_cast<char *>(bits);
|
|
}
|
|
|
|
HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
|
|
if ( !hbmp )
|
|
{
|
|
wxLogLastError(wxT("CreateBitmap"));
|
|
}
|
|
|
|
if ( data != bits )
|
|
{
|
|
free(data);
|
|
}
|
|
|
|
SetHBITMAP((WXHBITMAP)hbmp);
|
|
}
|
|
|
|
wxBitmap::wxBitmap(int w, int h, const wxDC& dc)
|
|
{
|
|
(void)Create(w, h, dc);
|
|
}
|
|
|
|
wxBitmap::wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth)
|
|
{
|
|
(void)Create(data, type, width, height, depth);
|
|
}
|
|
|
|
wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
|
|
{
|
|
LoadFile(filename, type);
|
|
}
|
|
|
|
bool wxBitmap::Create(int width, int height, int depth)
|
|
{
|
|
return DoCreate(width, height, depth, 0);
|
|
}
|
|
|
|
bool wxBitmap::Create(int width, int height, const wxDC& dc)
|
|
{
|
|
wxCHECK_MSG( dc.IsOk(), false, wxT("invalid HDC in wxBitmap::Create()") );
|
|
|
|
const wxMSWDCImpl *impl = wxDynamicCast( dc.GetImpl(), wxMSWDCImpl );
|
|
|
|
if (impl)
|
|
return DoCreate(width, height, -1, impl->GetHDC());
|
|
else
|
|
return false;
|
|
}
|
|
|
|
bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc)
|
|
{
|
|
UnRef();
|
|
|
|
wxCHECK_MSG( w > 0 && h > 0, false, wxT("invalid bitmap size") );
|
|
|
|
m_refData = new wxBitmapRefData;
|
|
|
|
GetBitmapData()->m_width = w;
|
|
GetBitmapData()->m_height = h;
|
|
|
|
HBITMAP hbmp wxDUMMY_INITIALIZE(0);
|
|
|
|
#ifndef NEVER_USE_DIB
|
|
if ( wxShouldCreateDIB(w, h, d, hdc) )
|
|
{
|
|
if ( d == -1 )
|
|
{
|
|
// create DIBs without alpha channel by default
|
|
d = 24;
|
|
}
|
|
|
|
wxDIB dib(w, h, d);
|
|
if ( !dib.IsOk() )
|
|
return false;
|
|
|
|
// don't delete the DIB section in dib object dtor
|
|
hbmp = dib.Detach();
|
|
|
|
GetBitmapData()->m_isDIB = true;
|
|
GetBitmapData()->m_depth = d;
|
|
}
|
|
else // create a DDB
|
|
#endif // NEVER_USE_DIB
|
|
{
|
|
#ifndef ALWAYS_USE_DIB
|
|
if ( d > 0 )
|
|
{
|
|
hbmp = ::CreateBitmap(w, h, 1, d, NULL);
|
|
if ( !hbmp )
|
|
{
|
|
wxLogLastError(wxT("CreateBitmap"));
|
|
}
|
|
|
|
GetBitmapData()->m_depth = d;
|
|
}
|
|
else // d == 0, create bitmap compatible with the screen
|
|
{
|
|
ScreenHDC dc;
|
|
hbmp = ::CreateCompatibleBitmap(dc, w, h);
|
|
if ( !hbmp )
|
|
{
|
|
wxLogLastError(wxT("CreateCompatibleBitmap"));
|
|
}
|
|
|
|
GetBitmapData()->m_depth = wxDisplayDepth();
|
|
}
|
|
#endif // !ALWAYS_USE_DIB
|
|
}
|
|
|
|
SetHBITMAP((WXHBITMAP)hbmp);
|
|
|
|
return IsOk();
|
|
}
|
|
|
|
#if wxUSE_IMAGE
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxImage to/from conversions
|
|
// ----------------------------------------------------------------------------
|
|
|
|
bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
|
|
{
|
|
return CreateFromImage(image, depth, 0);
|
|
}
|
|
|
|
bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc)
|
|
{
|
|
wxCHECK_MSG( dc.IsOk(), false,
|
|
wxT("invalid HDC in wxBitmap::CreateFromImage()") );
|
|
|
|
const wxMSWDCImpl *impl = wxDynamicCast( dc.GetImpl(), wxMSWDCImpl );
|
|
|
|
if (impl)
|
|
return CreateFromImage(image, -1, impl->GetHDC());
|
|
else
|
|
return false;
|
|
}
|
|
|
|
#if wxUSE_WXDIB
|
|
|
|
bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
|
|
{
|
|
wxCHECK_MSG( image.IsOk(), false, wxT("invalid image") );
|
|
|
|
UnRef();
|
|
|
|
// first convert the image to DIB
|
|
const int h = image.GetHeight();
|
|
const int w = image.GetWidth();
|
|
|
|
wxDIB dib(image);
|
|
if ( !dib.IsOk() )
|
|
return false;
|
|
|
|
const bool hasAlpha = image.HasAlpha();
|
|
|
|
if (depth == -1)
|
|
depth = dib.GetDepth();
|
|
|
|
// store the bitmap parameters
|
|
wxBitmapRefData * const refData = new wxBitmapRefData;
|
|
refData->m_width = w;
|
|
refData->m_height = h;
|
|
refData->m_hasAlpha = hasAlpha;
|
|
refData->m_depth = depth;
|
|
|
|
m_refData = refData;
|
|
|
|
|
|
// next either store DIB as is or create a DDB from it
|
|
HBITMAP hbitmap wxDUMMY_INITIALIZE(0);
|
|
|
|
// are we going to use DIB?
|
|
//
|
|
// NB: DDBs don't support alpha so if we have alpha channel we must use DIB
|
|
if ( hasAlpha || wxShouldCreateDIB(w, h, depth, hdc) )
|
|
{
|
|
// don't delete the DIB section in dib object dtor
|
|
hbitmap = dib.Detach();
|
|
|
|
refData->m_isDIB = true;
|
|
}
|
|
#ifndef ALWAYS_USE_DIB
|
|
else // we need to convert DIB to DDB
|
|
{
|
|
hbitmap = dib.CreateDDB((HDC)hdc);
|
|
}
|
|
#endif // !ALWAYS_USE_DIB
|
|
|
|
// validate this object
|
|
SetHBITMAP((WXHBITMAP)hbitmap);
|
|
|
|
// finally also set the mask if we have one
|
|
if ( image.HasMask() )
|
|
{
|
|
const size_t len = 2*((w+15)/16);
|
|
BYTE *src = image.GetData();
|
|
BYTE *data = new BYTE[h*len];
|
|
memset(data, 0, h*len);
|
|
BYTE r = image.GetMaskRed(),
|
|
g = image.GetMaskGreen(),
|
|
b = image.GetMaskBlue();
|
|
BYTE *dst = data;
|
|
for ( int y = 0; y < h; y++, dst += len )
|
|
{
|
|
BYTE *dstLine = dst;
|
|
BYTE mask = 0x80;
|
|
for ( int x = 0; x < w; x++, src += 3 )
|
|
{
|
|
if (src[0] != r || src[1] != g || src[2] != b)
|
|
*dstLine |= mask;
|
|
|
|
if ( (mask >>= 1) == 0 )
|
|
{
|
|
dstLine++;
|
|
mask = 0x80;
|
|
}
|
|
}
|
|
}
|
|
|
|
hbitmap = ::CreateBitmap(w, h, 1, 1, data);
|
|
if ( !hbitmap )
|
|
{
|
|
wxLogLastError(wxT("CreateBitmap(mask)"));
|
|
}
|
|
else
|
|
{
|
|
SetMask(new wxMask((WXHBITMAP)hbitmap));
|
|
}
|
|
|
|
delete[] data;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
wxImage wxBitmap::ConvertToImage() const
|
|
{
|
|
// convert DDB to DIB
|
|
wxDIB dib(*this);
|
|
|
|
if ( !dib.IsOk() )
|
|
{
|
|
return wxNullImage;
|
|
}
|
|
|
|
// and then DIB to our wxImage
|
|
// By default, we autodetect the presence of alpha and consider unnecessary
|
|
// to create the alpha channel in wxImage if we don't have any effective
|
|
// alpha in the bitmap because its depth, on its own, is not an indicator
|
|
// that it uses alpha as it could be just the default screen depth. However
|
|
// if the user had explicitly called UseAlpha(), then we consider
|
|
// that the resulting image should really have the alpha channel too.
|
|
wxImage image = dib.ConvertToImage(HasAlpha() ?
|
|
wxDIB::Convert_AlphaAlwaysIf32bpp : wxDIB::Convert_AlphaAuto);
|
|
if ( !image.IsOk() )
|
|
{
|
|
return wxNullImage;
|
|
}
|
|
|
|
// now do the same for the mask, if we have any
|
|
HBITMAP hbmpMask = GetMask() ? (HBITMAP) GetMask()->GetMaskBitmap() : NULL;
|
|
if ( hbmpMask )
|
|
{
|
|
wxDIB dibMask(hbmpMask);
|
|
if ( dibMask.IsOk() )
|
|
{
|
|
// TODO: use wxRawBitmap to iterate over DIB
|
|
|
|
// we hard code the mask colour for now but we could also make an
|
|
// effort (and waste time) to choose a colour not present in the
|
|
// image already to avoid having to fudge the pixels below --
|
|
// whether it's worth to do it is unclear however
|
|
static const int MASK_RED = 1;
|
|
static const int MASK_GREEN = 2;
|
|
static const int MASK_BLUE = 3;
|
|
static const int MASK_BLUE_REPLACEMENT = 2;
|
|
|
|
const int h = dibMask.GetHeight();
|
|
const int w = dibMask.GetWidth();
|
|
const int bpp = dibMask.GetDepth();
|
|
const int maskBytesPerPixel = bpp >> 3;
|
|
const int maskBytesPerLine = wxDIB::GetLineSize(w, bpp);
|
|
unsigned char *data = image.GetData();
|
|
|
|
// remember that DIBs are stored in bottom to top order
|
|
unsigned char *
|
|
maskLineStart = dibMask.GetData() + ((h - 1) * maskBytesPerLine);
|
|
|
|
for ( int y = 0; y < h; y++, maskLineStart -= maskBytesPerLine )
|
|
{
|
|
// traverse one mask DIB line
|
|
unsigned char *mask = maskLineStart;
|
|
for ( int x = 0; x < w; x++, mask += maskBytesPerPixel )
|
|
{
|
|
// should this pixel be transparent?
|
|
if ( *mask )
|
|
{
|
|
// no, check that it isn't transparent by accident
|
|
if ( (data[0] == MASK_RED) &&
|
|
(data[1] == MASK_GREEN) &&
|
|
(data[2] == MASK_BLUE) )
|
|
{
|
|
// we have to fudge the colour a bit to prevent
|
|
// this pixel from appearing transparent
|
|
data[2] = MASK_BLUE_REPLACEMENT;
|
|
}
|
|
|
|
data += 3;
|
|
}
|
|
else // yes, transparent pixel
|
|
{
|
|
*data++ = MASK_RED;
|
|
*data++ = MASK_GREEN;
|
|
*data++ = MASK_BLUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
|
|
}
|
|
}
|
|
|
|
return image;
|
|
}
|
|
|
|
#else // !wxUSE_WXDIB
|
|
|
|
bool
|
|
wxBitmap::CreateFromImage(const wxImage& WXUNUSED(image),
|
|
int WXUNUSED(depth),
|
|
WXHDC WXUNUSED(hdc))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
wxImage wxBitmap::ConvertToImage() const
|
|
{
|
|
return wxImage();
|
|
}
|
|
|
|
#endif // wxUSE_WXDIB/!wxUSE_WXDIB
|
|
|
|
#endif // wxUSE_IMAGE
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// loading and saving bitmaps
|
|
// ----------------------------------------------------------------------------
|
|
|
|
bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
|
|
{
|
|
UnRef();
|
|
|
|
wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
|
|
|
|
if ( handler )
|
|
{
|
|
m_refData = new wxBitmapRefData;
|
|
|
|
if ( !handler->LoadFile(this, filename, type, -1, -1) )
|
|
return false;
|
|
|
|
#if wxUSE_WXDIB
|
|
// wxBitmap must contain premultiplied data, but external files are not
|
|
// always in this format, so try to detect whether this is the case and
|
|
// create a premultiplied DIB if it really is.
|
|
HBITMAP hdib = CreatePremultipliedDIBIfNeeded(GetHbitmap());
|
|
if ( hdib )
|
|
static_cast<wxBitmapRefData*>(m_refData)->Set32bppHDIB(hdib);
|
|
#endif // wxUSE_WXDIB
|
|
|
|
return true;
|
|
}
|
|
#if wxUSE_IMAGE && wxUSE_WXDIB
|
|
else // no bitmap handler found
|
|
{
|
|
wxImage image;
|
|
if ( image.LoadFile( filename, type ) && image.IsOk() )
|
|
{
|
|
*this = wxBitmap(image);
|
|
|
|
return true;
|
|
}
|
|
}
|
|
#endif // wxUSE_IMAGE
|
|
|
|
return false;
|
|
}
|
|
|
|
bool wxBitmap::Create(const void* data, wxBitmapType type, int width, int height, int depth)
|
|
{
|
|
UnRef();
|
|
|
|
wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
|
|
|
|
if ( !handler )
|
|
{
|
|
wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type);
|
|
|
|
return false;
|
|
}
|
|
|
|
m_refData = new wxBitmapRefData;
|
|
|
|
return handler->Create(this, data, type, width, height, depth);
|
|
}
|
|
|
|
bool wxBitmap::SaveFile(const wxString& filename,
|
|
wxBitmapType type,
|
|
const wxPalette *palette) const
|
|
{
|
|
wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
|
|
|
|
if ( handler )
|
|
{
|
|
return handler->SaveFile(this, filename, type, palette);
|
|
}
|
|
#if wxUSE_IMAGE && wxUSE_WXDIB
|
|
else // no bitmap handler found
|
|
{
|
|
// FIXME what about palette? shouldn't we use it?
|
|
wxImage image = ConvertToImage();
|
|
if ( image.IsOk() )
|
|
{
|
|
return image.SaveFile(filename, type);
|
|
}
|
|
}
|
|
#endif // wxUSE_IMAGE
|
|
|
|
return false;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// sub bitmap extraction
|
|
// ----------------------------------------------------------------------------
|
|
wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect ) const
|
|
{
|
|
MemoryHDC dcSrc;
|
|
SelectInHDC selectSrc(dcSrc, GetHbitmap());
|
|
return GetSubBitmapOfHDC( rect, (WXHDC)dcSrc );
|
|
}
|
|
|
|
wxBitmap wxBitmap::GetSubBitmapOfHDC( const wxRect& rect, WXHDC hdc ) const
|
|
{
|
|
wxCHECK_MSG( IsOk() &&
|
|
(rect.x >= 0) && (rect.y >= 0) &&
|
|
(rect.x+rect.width <= GetWidth()) &&
|
|
(rect.y+rect.height <= GetHeight()),
|
|
wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
|
|
|
|
wxBitmap ret( rect.width, rect.height, GetDepth() );
|
|
wxASSERT_MSG( ret.IsOk(), wxT("GetSubBitmap error") );
|
|
|
|
// handle alpha channel, if any
|
|
if (HasAlpha())
|
|
ret.UseAlpha();
|
|
|
|
// copy bitmap data
|
|
MemoryHDC dcSrc,
|
|
dcDst;
|
|
|
|
{
|
|
SelectInHDC selectDst(dcDst, GetHbitmapOf(ret));
|
|
|
|
if ( !selectDst )
|
|
{
|
|
wxLogLastError(wxT("SelectObject(destBitmap)"));
|
|
}
|
|
|
|
if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
|
|
(HDC)hdc, rect.x, rect.y, SRCCOPY) )
|
|
{
|
|
wxLogLastError(wxT("BitBlt"));
|
|
}
|
|
}
|
|
|
|
// copy mask if there is one
|
|
if ( GetMask() )
|
|
{
|
|
HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
|
|
|
|
SelectInHDC selectSrc(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()),
|
|
selectDst(dcDst, hbmpMask);
|
|
|
|
if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
|
|
dcSrc, rect.x, rect.y, SRCCOPY) )
|
|
{
|
|
wxLogLastError(wxT("BitBlt"));
|
|
}
|
|
|
|
wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
|
|
ret.SetMask(mask);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxBitmap accessors
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#if wxUSE_PALETTE
|
|
wxPalette* wxBitmap::GetPalette() const
|
|
{
|
|
return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette
|
|
: NULL;
|
|
}
|
|
#endif
|
|
|
|
wxMask *wxBitmap::GetMask() const
|
|
{
|
|
return GetBitmapData() ? GetBitmapData()->GetMask() : NULL;
|
|
}
|
|
|
|
wxDC *wxBitmap::GetSelectedInto() const
|
|
{
|
|
#if wxDEBUG_LEVEL
|
|
return GetBitmapData() ? GetBitmapData()->m_selectedInto : NULL;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
void wxBitmap::UseAlpha(bool use)
|
|
{
|
|
if ( GetBitmapData() )
|
|
{
|
|
// Only 32bpp bitmaps can contain alpha channel.
|
|
if ( use && GetBitmapData()->m_depth < 32 )
|
|
use = false;
|
|
|
|
GetBitmapData()->m_hasAlpha = use;
|
|
}
|
|
}
|
|
|
|
bool wxBitmap::HasAlpha() const
|
|
{
|
|
return GetBitmapData() && GetBitmapData()->m_hasAlpha;
|
|
}
|
|
|
|
void wxBitmap::MSWUpdateAlpha()
|
|
{
|
|
#if wxUSE_WXDIB
|
|
if ( CheckAlpha(GetHbitmap()) )
|
|
GetBitmapData()->m_hasAlpha = true;
|
|
#else // !wxUSE_WXDIB
|
|
GetBitmapData()->m_hasAlpha = false;
|
|
#endif // wxUSE_WXDIB/!wxUSE_WXDIB
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxBitmap setters
|
|
// ----------------------------------------------------------------------------
|
|
|
|
void wxBitmap::SetSelectedInto(wxDC *dc)
|
|
{
|
|
#if wxDEBUG_LEVEL
|
|
if ( GetBitmapData() )
|
|
GetBitmapData()->m_selectedInto = dc;
|
|
#else
|
|
wxUnusedVar(dc);
|
|
#endif
|
|
}
|
|
|
|
#if wxUSE_PALETTE
|
|
|
|
void wxBitmap::SetPalette(const wxPalette& palette)
|
|
{
|
|
AllocExclusive();
|
|
|
|
GetBitmapData()->m_bitmapPalette = palette;
|
|
}
|
|
|
|
#endif // wxUSE_PALETTE
|
|
|
|
void wxBitmap::SetMask(wxMask *mask)
|
|
{
|
|
AllocExclusive();
|
|
|
|
GetBitmapData()->SetMask(mask);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// raw bitmap access support
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#ifdef wxHAS_RAW_BITMAP
|
|
|
|
void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
|
|
{
|
|
#if wxUSE_WXDIB
|
|
if ( !IsOk() )
|
|
{
|
|
// no bitmap, no data (raw or otherwise)
|
|
return NULL;
|
|
}
|
|
|
|
// if we're already a DIB we can access our data directly, but if not we
|
|
// need to convert this DDB to a DIB section and use it for raw access and
|
|
// then convert it back
|
|
HBITMAP hDIB;
|
|
if ( !GetBitmapData()->m_isDIB )
|
|
{
|
|
wxCHECK_MSG( !GetBitmapData()->m_dib, NULL,
|
|
wxT("GetRawData() may be called only once") );
|
|
|
|
wxDIB *dib = new wxDIB(*this);
|
|
if ( !dib->IsOk() )
|
|
{
|
|
delete dib;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// we'll free it in UngetRawData()
|
|
GetBitmapData()->m_dib = dib;
|
|
|
|
hDIB = dib->GetHandle();
|
|
}
|
|
else // we're a DIB
|
|
{
|
|
hDIB = GetHbitmap();
|
|
}
|
|
|
|
DIBSECTION ds;
|
|
if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) )
|
|
{
|
|
wxFAIL_MSG( wxT("failed to get DIBSECTION from a DIB?") );
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// check that the bitmap is in correct format
|
|
if ( ds.dsBm.bmBitsPixel != bpp )
|
|
{
|
|
wxFAIL_MSG( wxT("incorrect bitmap type in wxBitmap::GetRawData()") );
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// ok, store the relevant info in wxPixelDataBase
|
|
const LONG h = ds.dsBm.bmHeight;
|
|
|
|
data.m_width = ds.dsBm.bmWidth;
|
|
data.m_height = h;
|
|
|
|
// remember that DIBs are stored in top to bottom order!
|
|
// (We can't just use ds.dsBm.bmWidthBytes here, because it isn't always a
|
|
// multiple of 2, as required by the documentation. So we use the official
|
|
// formula, which we already use elsewhere.)
|
|
const LONG bytesPerRow =
|
|
wxDIB::GetLineSize(ds.dsBm.bmWidth, ds.dsBm.bmBitsPixel);
|
|
data.m_stride = -bytesPerRow;
|
|
|
|
char *bits = (char *)ds.dsBm.bmBits;
|
|
if ( h > 1 )
|
|
{
|
|
bits += (h - 1)*bytesPerRow;
|
|
}
|
|
|
|
return bits;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
|
|
{
|
|
#if wxUSE_WXDIB
|
|
if ( !IsOk() )
|
|
return;
|
|
|
|
if ( !&dataBase )
|
|
{
|
|
// invalid data, don't crash -- but don't assert neither as we're
|
|
// called automatically from wxPixelDataBase dtor and so there is no
|
|
// way to prevent this from happening
|
|
return;
|
|
}
|
|
|
|
// if we're a DDB we need to convert DIB back to DDB now to make the
|
|
// changes made via raw bitmap access effective
|
|
if ( !GetBitmapData()->m_isDIB )
|
|
{
|
|
wxDIB *dib = GetBitmapData()->m_dib;
|
|
GetBitmapData()->m_dib = NULL;
|
|
|
|
GetBitmapData()->Free();
|
|
GetBitmapData()->CopyFromDIB(*dib);
|
|
|
|
delete dib;
|
|
}
|
|
#endif // wxUSE_WXDIB
|
|
}
|
|
#endif // wxHAS_RAW_BITMAP
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxMask
|
|
// ----------------------------------------------------------------------------
|
|
|
|
wxMask::wxMask()
|
|
{
|
|
m_maskBitmap = 0;
|
|
}
|
|
|
|
// Copy constructor
|
|
wxMask::wxMask(const wxMask &mask)
|
|
: wxObject()
|
|
{
|
|
BITMAP bmp;
|
|
|
|
HDC srcDC = CreateCompatibleDC(0);
|
|
HDC destDC = CreateCompatibleDC(0);
|
|
|
|
// GetBitmapDimensionEx won't work if SetBitmapDimensionEx wasn't used
|
|
// so we'll use GetObject() API here:
|
|
if (::GetObject((HGDIOBJ)mask.m_maskBitmap, sizeof(bmp), &bmp) == 0)
|
|
{
|
|
wxFAIL_MSG(wxT("Cannot retrieve the dimensions of the wxMask to copy"));
|
|
return;
|
|
}
|
|
|
|
// create our HBITMAP
|
|
int w = bmp.bmWidth, h = bmp.bmHeight;
|
|
m_maskBitmap = (WXHBITMAP)CreateCompatibleBitmap(srcDC, w, h);
|
|
|
|
// copy the mask's HBITMAP into our HBITMAP
|
|
SelectObject(srcDC, (HBITMAP) mask.m_maskBitmap);
|
|
SelectObject(destDC, (HBITMAP) m_maskBitmap);
|
|
|
|
BitBlt(destDC, 0, 0, w, h, srcDC, 0, 0, SRCCOPY);
|
|
|
|
SelectObject(srcDC, 0);
|
|
DeleteDC(srcDC);
|
|
SelectObject(destDC, 0);
|
|
DeleteDC(destDC);
|
|
}
|
|
|
|
// Construct a mask from a bitmap and a colour indicating
|
|
// the transparent area
|
|
wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
|
|
{
|
|
m_maskBitmap = 0;
|
|
Create(bitmap, colour);
|
|
}
|
|
|
|
// Construct a mask from a bitmap and a palette index indicating
|
|
// the transparent area
|
|
wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
|
|
{
|
|
m_maskBitmap = 0;
|
|
Create(bitmap, paletteIndex);
|
|
}
|
|
|
|
// Construct a mask from a mono bitmap (copies the bitmap).
|
|
wxMask::wxMask(const wxBitmap& bitmap)
|
|
{
|
|
m_maskBitmap = 0;
|
|
Create(bitmap);
|
|
}
|
|
|
|
wxMask::~wxMask()
|
|
{
|
|
if ( m_maskBitmap )
|
|
::DeleteObject((HBITMAP) m_maskBitmap);
|
|
}
|
|
|
|
// Create a mask from a mono bitmap (copies the bitmap).
|
|
bool wxMask::Create(const wxBitmap& bitmap)
|
|
{
|
|
wxCHECK_MSG( bitmap.IsOk() && bitmap.GetDepth() == 1, false,
|
|
wxT("can't create mask from invalid or not monochrome bitmap") );
|
|
|
|
if ( m_maskBitmap )
|
|
{
|
|
::DeleteObject((HBITMAP) m_maskBitmap);
|
|
m_maskBitmap = 0;
|
|
}
|
|
|
|
m_maskBitmap = (WXHBITMAP) CreateBitmap(
|
|
bitmap.GetWidth(),
|
|
bitmap.GetHeight(),
|
|
1, 1, 0
|
|
);
|
|
HDC srcDC = CreateCompatibleDC(0);
|
|
SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
|
|
HDC destDC = CreateCompatibleDC(0);
|
|
SelectObject(destDC, (HBITMAP) m_maskBitmap);
|
|
BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
|
|
SelectObject(srcDC, 0);
|
|
DeleteDC(srcDC);
|
|
SelectObject(destDC, 0);
|
|
DeleteDC(destDC);
|
|
return true;
|
|
}
|
|
|
|
// Create a mask from a bitmap and a palette index indicating
|
|
// the transparent area
|
|
bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
|
|
{
|
|
if ( m_maskBitmap )
|
|
{
|
|
::DeleteObject((HBITMAP) m_maskBitmap);
|
|
m_maskBitmap = 0;
|
|
}
|
|
|
|
#if wxUSE_PALETTE
|
|
if (bitmap.IsOk() && bitmap.GetPalette()->IsOk())
|
|
{
|
|
unsigned char red, green, blue;
|
|
if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
|
|
{
|
|
wxColour transparentColour(red, green, blue);
|
|
return Create(bitmap, transparentColour);
|
|
}
|
|
}
|
|
#endif // wxUSE_PALETTE
|
|
|
|
return false;
|
|
}
|
|
|
|
// Create a mask from a bitmap and a colour indicating
|
|
// the transparent area
|
|
bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
|
|
{
|
|
wxCHECK_MSG( bitmap.IsOk(), false, wxT("invalid bitmap in wxMask::Create") );
|
|
|
|
if ( m_maskBitmap )
|
|
{
|
|
::DeleteObject((HBITMAP) m_maskBitmap);
|
|
m_maskBitmap = 0;
|
|
}
|
|
|
|
int width = bitmap.GetWidth(),
|
|
height = bitmap.GetHeight();
|
|
|
|
// scan the bitmap for the transparent colour and set the corresponding
|
|
// pixels in the mask to BLACK and the rest to WHITE
|
|
COLORREF maskColour = wxColourToPalRGB(colour);
|
|
m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
|
|
|
|
HDC srcDC = ::CreateCompatibleDC(NULL);
|
|
HDC destDC = ::CreateCompatibleDC(NULL);
|
|
if ( !srcDC || !destDC )
|
|
{
|
|
wxLogLastError(wxT("CreateCompatibleDC"));
|
|
}
|
|
|
|
bool ok = true;
|
|
|
|
// SelectObject() will fail
|
|
wxASSERT_MSG( !bitmap.GetSelectedInto(),
|
|
wxT("bitmap can't be selected in another DC") );
|
|
|
|
HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
|
|
if ( !hbmpSrcOld )
|
|
{
|
|
wxLogLastError(wxT("SelectObject"));
|
|
|
|
ok = false;
|
|
}
|
|
|
|
HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
|
|
if ( !hbmpDstOld )
|
|
{
|
|
wxLogLastError(wxT("SelectObject"));
|
|
|
|
ok = false;
|
|
}
|
|
|
|
if ( ok )
|
|
{
|
|
// this will create a monochrome bitmap with 0 points for the pixels
|
|
// which have the same value as the background colour and 1 for the
|
|
// others
|
|
::SetBkColor(srcDC, maskColour);
|
|
::BitBlt(destDC, 0, 0, width, height, srcDC, 0, 0, NOTSRCCOPY);
|
|
}
|
|
|
|
::SelectObject(srcDC, hbmpSrcOld);
|
|
::DeleteDC(srcDC);
|
|
::SelectObject(destDC, hbmpDstOld);
|
|
::DeleteDC(destDC);
|
|
|
|
return ok;
|
|
}
|
|
|
|
wxBitmap wxMask::GetBitmap() const
|
|
{
|
|
wxBitmap bmp;
|
|
bmp.SetHBITMAP(m_maskBitmap);
|
|
return bmp;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxBitmapHandler
|
|
// ----------------------------------------------------------------------------
|
|
|
|
bool wxBitmapHandler::Create(wxGDIImage *image,
|
|
const void* data,
|
|
wxBitmapType type,
|
|
int width, int height, int depth)
|
|
{
|
|
wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
|
|
|
|
return bitmap && Create(bitmap, data, type, width, height, depth);
|
|
}
|
|
|
|
bool wxBitmapHandler::Load(wxGDIImage *image,
|
|
const wxString& name,
|
|
wxBitmapType type,
|
|
int width, int height)
|
|
{
|
|
wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
|
|
|
|
return bitmap && LoadFile(bitmap, name, type, width, height);
|
|
}
|
|
|
|
bool wxBitmapHandler::Save(const wxGDIImage *image,
|
|
const wxString& name,
|
|
wxBitmapType type) const
|
|
{
|
|
wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
|
|
|
|
return bitmap && SaveFile(bitmap, name, type);
|
|
}
|
|
|
|
bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
|
|
const void* WXUNUSED(data),
|
|
wxBitmapType WXUNUSED(type),
|
|
int WXUNUSED(width),
|
|
int WXUNUSED(height),
|
|
int WXUNUSED(depth))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
|
|
const wxString& WXUNUSED(name),
|
|
wxBitmapType WXUNUSED(type),
|
|
int WXUNUSED(desiredWidth),
|
|
int WXUNUSED(desiredHeight))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool wxBitmapHandler::SaveFile(const wxBitmap *WXUNUSED(bitmap),
|
|
const wxString& WXUNUSED(name),
|
|
wxBitmapType WXUNUSED(type),
|
|
const wxPalette *WXUNUSED(palette)) const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// global helper functions implemented here
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// helper of wxBitmapToHICON/HCURSOR
|
|
static
|
|
HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
|
|
bool iconWanted,
|
|
int hotSpotX,
|
|
int hotSpotY)
|
|
{
|
|
if ( !bmp.IsOk() )
|
|
{
|
|
// we can't create an icon/cursor form nothing
|
|
return 0;
|
|
}
|
|
|
|
if ( bmp.HasAlpha() )
|
|
{
|
|
HBITMAP hbmp;
|
|
|
|
#if wxUSE_WXDIB && wxUSE_IMAGE
|
|
// CreateIconIndirect() requires non-pre-multiplied pixel data on input
|
|
// as it does pre-multiplication internally itself so we need to create
|
|
// a special DIB in such format to pass to it. This is inefficient but
|
|
// better than creating an icon with wrong colours.
|
|
AutoHBITMAP hbmpRelease;
|
|
hbmp = wxDIB(bmp.ConvertToImage(),
|
|
wxDIB::PixelFormat_NotPreMultiplied).Detach();
|
|
hbmpRelease.Init(hbmp);
|
|
#else // !(wxUSE_WXDIB && wxUSE_IMAGE)
|
|
hbmp = GetHbitmapOf(bmp);
|
|
#endif // wxUSE_WXDIB && wxUSE_IMAGE
|
|
|
|
// Create an empty mask bitmap.
|
|
// it doesn't seem to work if we mess with the mask at all.
|
|
AutoHBITMAP
|
|
hMonoBitmap(CreateBitmap(bmp.GetWidth(),bmp.GetHeight(),1,1,NULL));
|
|
|
|
ICONINFO iconInfo;
|
|
wxZeroMemory(iconInfo);
|
|
iconInfo.fIcon = iconWanted; // do we want an icon or a cursor?
|
|
if ( !iconWanted )
|
|
{
|
|
iconInfo.xHotspot = hotSpotX;
|
|
iconInfo.yHotspot = hotSpotY;
|
|
}
|
|
|
|
iconInfo.hbmMask = hMonoBitmap;
|
|
iconInfo.hbmColor = hbmp;
|
|
|
|
return ::CreateIconIndirect(&iconInfo);
|
|
}
|
|
|
|
wxMask* mask = bmp.GetMask();
|
|
|
|
if ( !mask )
|
|
{
|
|
// we must have a mask for an icon, so even if it's probably incorrect,
|
|
// do create it (grey is the "standard" transparent colour)
|
|
mask = new wxMask(bmp, *wxLIGHT_GREY);
|
|
}
|
|
|
|
ICONINFO iconInfo;
|
|
wxZeroMemory(iconInfo);
|
|
iconInfo.fIcon = iconWanted; // do we want an icon or a cursor?
|
|
if ( !iconWanted )
|
|
{
|
|
iconInfo.xHotspot = hotSpotX;
|
|
iconInfo.yHotspot = hotSpotY;
|
|
}
|
|
|
|
AutoHBITMAP hbmpMask(wxInvertMask((HBITMAP)mask->GetMaskBitmap()));
|
|
iconInfo.hbmMask = hbmpMask;
|
|
iconInfo.hbmColor = GetHbitmapOf(bmp);
|
|
|
|
// black out the transparent area to preserve background colour, because
|
|
// Windows blits the original bitmap using SRCINVERT (XOR) after applying
|
|
// the mask to the dest rect.
|
|
{
|
|
MemoryHDC dcSrc, dcDst;
|
|
SelectInHDC selectMask(dcSrc, (HBITMAP)mask->GetMaskBitmap()),
|
|
selectBitmap(dcDst, iconInfo.hbmColor);
|
|
|
|
if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(),
|
|
dcSrc, 0, 0, SRCAND) )
|
|
{
|
|
wxLogLastError(wxT("BitBlt"));
|
|
}
|
|
}
|
|
|
|
HICON hicon = ::CreateIconIndirect(&iconInfo);
|
|
|
|
if ( !bmp.GetMask() && !bmp.HasAlpha() )
|
|
{
|
|
// we created the mask, now delete it
|
|
delete mask;
|
|
}
|
|
|
|
return hicon;
|
|
}
|
|
|
|
HICON wxBitmapToHICON(const wxBitmap& bmp)
|
|
{
|
|
return wxBitmapToIconOrCursor(bmp, true, 0, 0);
|
|
}
|
|
|
|
HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY)
|
|
{
|
|
return (HCURSOR)wxBitmapToIconOrCursor(bmp, false, hotSpotX, hotSpotY);
|
|
}
|
|
|
|
HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
|
|
{
|
|
wxCHECK_MSG( hbmpMask, 0, wxT("invalid bitmap in wxInvertMask") );
|
|
|
|
// get width/height from the bitmap if not given
|
|
if ( !w || !h )
|
|
{
|
|
BITMAP bm;
|
|
::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
|
|
w = bm.bmWidth;
|
|
h = bm.bmHeight;
|
|
}
|
|
|
|
HDC hdcSrc = ::CreateCompatibleDC(NULL);
|
|
HDC hdcDst = ::CreateCompatibleDC(NULL);
|
|
if ( !hdcSrc || !hdcDst )
|
|
{
|
|
wxLogLastError(wxT("CreateCompatibleDC"));
|
|
}
|
|
|
|
HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
|
|
if ( !hbmpInvMask )
|
|
{
|
|
wxLogLastError(wxT("CreateBitmap"));
|
|
}
|
|
|
|
HGDIOBJ srcTmp = ::SelectObject(hdcSrc, hbmpMask);
|
|
HGDIOBJ dstTmp = ::SelectObject(hdcDst, hbmpInvMask);
|
|
if ( !::BitBlt(hdcDst, 0, 0, w, h,
|
|
hdcSrc, 0, 0,
|
|
NOTSRCCOPY) )
|
|
{
|
|
wxLogLastError(wxT("BitBlt"));
|
|
}
|
|
|
|
// Deselect objects
|
|
SelectObject(hdcSrc,srcTmp);
|
|
SelectObject(hdcDst,dstTmp);
|
|
|
|
::DeleteDC(hdcSrc);
|
|
::DeleteDC(hdcDst);
|
|
|
|
return hbmpInvMask;
|
|
}
|