modifications for raw bitmap support and for using DIBs
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19710 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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@ -31,6 +31,7 @@ class WXDLLEXPORT wxCursor;
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class WXDLLEXPORT wxControl;
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class WXDLLEXPORT wxImage;
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class WXDLLEXPORT wxPalette;
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class WXDLLEXPORT wxRawBitmapData;
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// ----------------------------------------------------------------------------
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// wxBitmap: a mono or colour bitmap
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@ -58,13 +59,24 @@ public:
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// New constructor for generalised creation from data
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wxBitmap(void *data, long type, int width, int height, int depth = 1);
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// If depth is omitted, will create a bitmap compatible with the display
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// Create a new, uninitialized bitmap of the given size and depth (if it
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// is omitted, will create a bitmap compatible with the display)
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//
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// NB: this ctor will create a DIB for 24 and 32bpp bitmaps, use ctor
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// taking a DC argument if you want to force using DDB in this case
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wxBitmap(int width, int height, int depth = -1);
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// Create a bitmap compatible with the given DC
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wxBitmap(int width, int height, const wxDC& dc);
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#if wxUSE_IMAGE
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// Convert from wxImage:
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// Convert from wxImage
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wxBitmap(const wxImage& image, int depth = -1)
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{ (void)CreateFromImage(image, depth); }
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// Create a DDB compatible with the given DC from wxImage
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wxBitmap(const wxImage& image, const wxDC& dc)
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{ (void)CreateFromImage(image, dc); }
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#endif // wxUSE_IMAGE
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// we must have this, otherwise icons are silently copied into bitmaps using
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@ -108,6 +120,7 @@ public:
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bool CopyFromCursor(const wxCursor& cursor);
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virtual bool Create(int width, int height, int depth = -1);
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virtual bool Create(int width, int height, const wxDC& dc);
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virtual bool Create(void *data, long type, int width, int height, int depth = 1);
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virtual bool LoadFile(const wxString& name, long type = wxBITMAP_TYPE_BMP_RESOURCE);
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virtual bool SaveFile(const wxString& name, int type, const wxPalette *cmap = NULL);
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@ -115,6 +128,10 @@ public:
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wxBitmapRefData *GetBitmapData() const
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{ return (wxBitmapRefData *)m_refData; }
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// raw bitmap access support functions
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bool GetRawData(wxRawBitmapData *data);
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void UngetRawData(wxRawBitmapData *) { /* nothing to do here */ }
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#if wxUSE_PALETTE
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wxPalette* GetPalette() const;
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void SetPalette(const wxPalette& palette);
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@ -140,14 +157,16 @@ public:
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void SetOk(bool isOk);
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#endif // WXWIN_COMPATIBILITY_2
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#if wxUSE_PALETTE
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#if WXWIN_COMPATIBILITY
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#if wxUSE_PALETTE
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wxPalette *GetColourMap() const { return GetPalette(); }
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void SetColourMap(wxPalette *cmap) { SetPalette(*cmap); };
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#endif // WXWIN_COMPATIBILITY
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#endif // wxUSE_PALETTE
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#endif // WXWIN_COMPATIBILITY
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// implementation only from now on
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// -------------------------------
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// Implementation
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public:
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void SetHBITMAP(WXHBITMAP bmp) { SetHandle((WXHANDLE)bmp); }
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WXHBITMAP GetHBITMAP() const { return (WXHBITMAP)GetHandle(); }
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@ -180,17 +199,20 @@ protected:
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// creates the bitmap from XPM data, supposed to be called from ctor
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bool CreateFromXpm(const char **bits);
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// creates an uninitialized bitmap, called from Create()s above
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bool DoCreate(int w, int h, int depth, WXHDC hdc);
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#if wxUSE_IMAGE
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// creates the bitmap from wxImage, supposed to be called from ctor
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bool CreateFromImage(const wxImage& image, int depth);
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// creates a DDB from wxImage, supposed to be called from ctor
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bool CreateFromImage(const wxImage& image, const wxDC& dc);
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// common part of the 2 methods above (hdc may be 0)
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bool CreateFromImage(const wxImage& image, int depth, WXHDC hdc);
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#endif // wxUSE_IMAGE
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#if wxUSE_DIB_FOR_BITMAP
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void *CreateDIB(int width, int height, int depth);
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void CopyDIBLine(void* src, void* dest, int count) const;
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#endif // wxUSE_DIB_FOR_BITMAP
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private:
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#ifdef __WIN32__
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// common part of CopyFromIcon/CopyFromCursor for Win32
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@ -50,6 +50,8 @@
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#include "wx/image.h"
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#include "wx/xpmdecod.h"
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#include "wx/rawbmp.h"
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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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@ -122,6 +124,34 @@ IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
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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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static 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 or
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// less DIBs anyhow)
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// (c) finally, create DIBs under Win9x even if the depth hasn't been
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// explicitly specified but the current display depth is 24 or more
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// and the image is "big", i.e. > 16Mb which is the theoretical limit
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// for DDBs under Win9x
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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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// ----------------------------------------------------------------------------
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// wxBitmapRefData
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// ----------------------------------------------------------------------------
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@ -161,7 +191,6 @@ void wxBitmapRefData::Free()
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void wxBitmap::Init()
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{
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// m_refData = NULL; done in the base class ctor
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}
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wxGDIImageRefData *wxBitmap::CreateData() const
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@ -387,26 +416,54 @@ wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
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LoadFile(filename, (int)type);
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}
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bool wxBitmap::Create(int w, int h, int d)
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bool wxBitmap::Create(int width, int height, int depth)
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{
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return DoCreate(width, height, depth, 0);
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}
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bool wxBitmap::Create(int width, int height, const wxDC& dc)
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{
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wxCHECK_MSG( dc.Ok(), FALSE, _T("invalid HDC in wxBitmap::Create()") );
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return DoCreate(width, height, -1, dc.GetHDC());
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}
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bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc)
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{
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UnRef();
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m_refData = new wxBitmapRefData;
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#if wxUSE_DIB_FOR_BITMAP
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if ( w && h && d >= 16 )
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GetBitmapData()->m_width = w;
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GetBitmapData()->m_height = h;
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HBITMAP hbmp;
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if ( wxShouldCreateDIB(w, h, d, hdc) )
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{
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if ( !CreateDIB(w, h, d) )
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if ( d == -1 )
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{
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// create DIBs without alpha channel by default
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d = 24;
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}
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wxDIB dib(w, h, d);
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if ( !dib.IsOk() )
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return FALSE;
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// don't delete the DIB section in dib object dtor
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hbmp = dib.Detach();
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GetBitmapData()->m_depth = d;
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GetBitmapData()->m_hasAlpha = d == 32; // 32bpp DIBs have alpha channel
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}
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else
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#endif // wxUSE_DIB_FOR_BITMAP
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else // create a DDB
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{
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GetBitmapData()->m_width = w;
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GetBitmapData()->m_height = h;
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if ( d == -1 )
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d = wxDisplayDepth();
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GetBitmapData()->m_depth = d;
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HBITMAP hbmp;
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#ifndef __WXMICROWIN__
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if ( d > 0 )
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{
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@ -428,13 +485,13 @@ bool wxBitmap::Create(int w, int h, int d)
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GetBitmapData()->m_depth = wxDisplayDepth();
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}
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}
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SetHBITMAP((WXHBITMAP)hbmp);
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SetHBITMAP((WXHBITMAP)hbmp);
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#if WXWIN_COMPATIBILITY_2
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GetBitmapData()->m_ok = hbmp != 0;
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GetBitmapData()->m_ok = hbmp != 0;
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#endif // WXWIN_COMPATIBILITY_2
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}
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return Ok();
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}
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@ -449,7 +506,7 @@ bool wxBitmap::Create(int w, int h, int d)
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// make sense to use #ifdefs inside the function bodies
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#ifdef __WXMICROWIN__
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bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
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bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
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{
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// Set this to 1 to experiment with mask code,
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// which currently doesn't work
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@ -637,7 +694,20 @@ wxImage wxBitmap::ConvertToImage() const
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// wxImage to/from conversions
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// ----------------------------------------------------------------------------
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bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
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bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
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{
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return CreateFromImage(image, depth, 0);
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}
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bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc)
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{
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wxCHECK_MSG( dc.Ok(), FALSE,
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_T("invalid HDC in wxBitmap::CreateFromImage()") );
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return CreateFromImage(image, -1, dc.GetHDC());
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}
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bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc )
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{
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wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
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@ -656,7 +726,6 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
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wxBitmapRefData *refData = new wxBitmapRefData;
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refData->m_width = w;
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refData->m_height = h;
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refData->m_depth = dib.GetDepth();
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refData->m_hasAlpha = image.HasAlpha();
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m_refData = refData;
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@ -665,16 +734,21 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
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// next either store DIB as is or create a DDB from it
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HBITMAP hbitmap;
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// TODO: if we're ready to use DIB as is, we can just do this:
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// if ( ... )
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// hbitmap = dib.Detach();
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// else
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// are we going to use DIB?
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if ( wxShouldCreateDIB(w, h, depth, hdc) )
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{
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// don't delete the DIB section in dib object dtor
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hbitmap = dib.Detach();
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refData->m_depth = dib.GetDepth();
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}
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else // we need to convert DIB to DDB
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{
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// create and set the device-dependent bitmap
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//
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// VZ: why don't we just use SetDIBits() instead? because of the
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// palette or is there some other reason?
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hbitmap = ::CreateCompatibleBitmap(ScreenHDC(), w, h);
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hbitmap = ::CreateCompatibleBitmap(hdc ? (HDC)hdc : ScreenHDC(), w, h);
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if ( !hbitmap )
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{
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wxLogLastError(_T("CreateCompatibleBitmap()"));
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@ -745,6 +819,8 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
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::SelectPalette(hdcMem, hOldPalette, FALSE);
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}
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#endif // wxUSE_PALETTE
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refData->m_depth = depth == -1 ? wxDisplayDepth() : depth;
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}
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// validate this object
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@ -1119,6 +1195,46 @@ void wxBitmap::SetQuality(int WXUNUSED(quality))
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#endif // WXWIN_COMPATIBILITY_2_4
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// ----------------------------------------------------------------------------
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// raw bitmap access support
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// ----------------------------------------------------------------------------
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bool wxBitmap::GetRawData(wxRawBitmapData *data)
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{
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wxCHECK_MSG( data, FALSE, _T("NULL pointer in wxBitmap::GetRawData") );
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if ( !Ok() )
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{
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// no bitmap, no data (raw or otherwise)
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return FALSE;
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}
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// we only support raw access to the DIBs, so check if we have one
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DIBSECTION ds;
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if ( !::GetObject(GetHbitmap(), sizeof(ds), &ds) )
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{
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return FALSE;
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}
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// ok, store the relevant info in wxRawBitmapData
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const LONG h = ds.dsBm.bmHeight;
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data->m_width = ds.dsBm.bmWidth;
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data->m_height = h;
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data->m_bypp = ds.dsBm.bmBitsPixel / 8;
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// remember that DIBs are stored in top to bottom order!
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const LONG bytesPerRow = ds.dsBm.bmWidthBytes;
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data->m_stride = -bytesPerRow;
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data->m_pixels = (unsigned char *)ds.dsBm.bmBits;
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if ( h > 1 )
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{
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data->m_pixels += (h - 1)*bytesPerRow;
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}
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return TRUE;
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}
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// ----------------------------------------------------------------------------
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// TODO: to be replaced by something better
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// ----------------------------------------------------------------------------
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