338 lines
12 KiB
C++
338 lines
12 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/msw/bitmap.h
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// Purpose: wxBitmap class
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// Author: Julian Smart
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// Modified by:
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// Created: 01/02/97
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_BITMAP_H_
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#define _WX_BITMAP_H_
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#include "wx/msw/gdiimage.h"
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#include "wx/math.h"
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#include "wx/palette.h"
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class WXDLLIMPEXP_FWD_CORE wxBitmap;
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class WXDLLIMPEXP_FWD_CORE wxBitmapHandler;
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class WXDLLIMPEXP_FWD_CORE wxBitmapRefData;
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class WXDLLIMPEXP_FWD_CORE wxControl;
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class WXDLLIMPEXP_FWD_CORE wxCursor;
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class WXDLLIMPEXP_FWD_CORE wxDC;
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#if wxUSE_WXDIB
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class WXDLLIMPEXP_FWD_CORE wxDIB;
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#endif
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class WXDLLIMPEXP_FWD_CORE wxIcon;
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class WXDLLIMPEXP_FWD_CORE wxMask;
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class WXDLLIMPEXP_FWD_CORE wxPalette;
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class WXDLLIMPEXP_FWD_CORE wxPixelDataBase;
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// What kind of transparency should a bitmap copied from an icon or cursor
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// have?
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enum wxBitmapTransparency
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{
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wxBitmapTransparency_Auto, // default: copy alpha if the source has it
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wxBitmapTransparency_None, // never create alpha
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wxBitmapTransparency_Always // always use alpha
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};
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// ----------------------------------------------------------------------------
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// wxBitmap: a mono or colour bitmap
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// NOTE: for wxMSW we don't use the wxBitmapBase base class declared in bitmap.h!
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxBitmap : public wxGDIImage,
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public wxBitmapHelpers
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{
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public:
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// default ctor creates an invalid bitmap, you must Create() it later
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wxBitmap() { }
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// Initialize with raw data
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wxBitmap(const char bits[], int width, int height, int depth = 1);
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// Initialize with XPM data
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wxBitmap(const char* const* data);
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// Load a file or resource
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wxBitmap(const wxString& name, wxBitmapType type = wxBITMAP_DEFAULT_TYPE);
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// New constructor for generalised creation from data
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wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth = 1);
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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) { (void)Create(width, height, depth); }
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wxBitmap(const wxSize& sz, int depth = -1) { (void)Create(sz, depth); }
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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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wxBitmap(const wxImage& image, int depth = -1, double WXUNUSED(scale) = 1.0)
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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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// the copy ctor but the resulting bitmap is invalid!
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wxBitmap(const wxIcon& icon,
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wxBitmapTransparency transp = wxBitmapTransparency_Auto)
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{
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CopyFromIcon(icon, transp);
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}
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// Convert from wxCursor
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explicit wxBitmap(const wxCursor& cursor)
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{
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(void)CopyFromCursor(cursor, wxBitmapTransparency_Auto);
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}
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#if wxUSE_IMAGE
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wxBitmap& operator=(const wxImage& image)
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{
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return *this = wxBitmap(image);
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}
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#endif // wxUSE_IMAGE
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wxBitmap& operator=(const wxIcon& icon)
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{
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(void)CopyFromIcon(icon);
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return *this;
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}
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#if WXWIN_COMPATIBILITY_3_0
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// This assignment operator is not portable as it is not implemented in any
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// other ports.
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wxDEPRECATED_MSG("Don't assign wxCursor to an existing wxBitmap, create a new wxBitmap from wxCursor instead.")
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wxBitmap& operator=(const wxCursor& cursor)
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{
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(void)CopyFromCursor(cursor);
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return *this;
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}
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#endif // WXWIN_COMPATIBILITY_3_0
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virtual ~wxBitmap();
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#if wxUSE_IMAGE
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wxImage ConvertToImage() const;
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wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
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#endif // wxUSE_IMAGE
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// get the given part of bitmap
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wxBitmap GetSubBitmap( const wxRect& rect ) const;
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// NB: This should not be called from user code. It is for wx internal
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// use only.
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wxBitmap GetSubBitmapOfHDC( const wxRect& rect, WXHDC hdc ) const;
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// copies the contents and mask of the given (colour) icon to the bitmap
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bool CopyFromIcon(const wxIcon& icon,
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wxBitmapTransparency transp = wxBitmapTransparency_Auto);
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// copies the contents and mask of the given cursor to the bitmap
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bool CopyFromCursor(const wxCursor& cursor,
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wxBitmapTransparency transp = wxBitmapTransparency_Auto);
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#if wxUSE_WXDIB
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// copies from a device independent bitmap
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bool CopyFromDIB(const wxDIB& dib);
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bool IsDIB() const;
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bool ConvertToDIB();
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#endif
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virtual bool Create(int width, int height, int depth = wxBITMAP_SCREEN_DEPTH);
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virtual bool Create(const wxSize& sz, int depth = wxBITMAP_SCREEN_DEPTH)
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{ return Create(sz.GetWidth(), sz.GetHeight(), depth); }
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virtual bool Create(int width, int height, const wxDC& dc);
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virtual bool Create(const void* data, wxBitmapType type, int width, int height, int depth = 1);
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virtual bool CreateScaled(int w, int h, int d, double logicalScale)
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{ return Create(wxRound(w*logicalScale), wxRound(h*logicalScale), d); }
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virtual bool LoadFile(const wxString& name, wxBitmapType type = wxBITMAP_DEFAULT_TYPE);
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virtual bool SaveFile(const wxString& name, wxBitmapType type, const wxPalette *cmap = NULL) const;
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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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void *GetRawData(wxPixelDataBase& data, int bpp);
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void UngetRawData(wxPixelDataBase& data);
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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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#endif // wxUSE_PALETTE
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wxMask *GetMask() const;
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void SetMask(wxMask *mask);
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// these functions are internal and shouldn't be used, they risk to
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// disappear in the future
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bool HasAlpha() const;
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void UseAlpha(bool use = true);
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void ResetAlpha() { UseAlpha(false); }
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// support for scaled bitmaps
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virtual double GetScaleFactor() const { return 1.0; }
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virtual double GetScaledWidth() const { return GetWidth() / GetScaleFactor(); }
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virtual double GetScaledHeight() const { return GetHeight() / GetScaleFactor(); }
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virtual wxSize GetScaledSize() const
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{ return wxSize(wxRound(GetScaledWidth()), wxRound(GetScaledHeight())); }
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// implementation only from now on
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// -------------------------------
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// Set alpha flag to true if this is a 32bpp bitmap which has any non-0
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// values in its alpha channel.
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void MSWUpdateAlpha();
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// Blend mask with alpha channel and remove the mask
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void MSWBlendMaskWithAlpha();
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public:
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#if WXWIN_COMPATIBILITY_3_0
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wxDEPRECATED_INLINE(void SetHBITMAP(WXHBITMAP bmp), SetHandle((WXHANDLE)bmp); )
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#endif // WXWIN_COMPATIBILITY_3_0
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WXHBITMAP GetHBITMAP() const { return (WXHBITMAP)GetHandle(); }
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bool InitFromHBITMAP(WXHBITMAP bmp, int width, int height, int depth);
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void ResetHBITMAP() { InitFromHBITMAP(NULL, 0, 0, 0); }
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void SetSelectedInto(wxDC *dc);
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wxDC *GetSelectedInto() const;
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protected:
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virtual wxGDIImageRefData *CreateData() const wxOVERRIDE;
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virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const wxOVERRIDE;
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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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private:
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// common part of CopyFromIcon/CopyFromCursor for Win32
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bool
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CopyFromIconOrCursor(const wxGDIImage& icon,
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wxBitmapTransparency transp = wxBitmapTransparency_Auto);
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wxDECLARE_DYNAMIC_CLASS(wxBitmap);
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};
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// ----------------------------------------------------------------------------
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// wxMask: a mono bitmap used for drawing bitmaps transparently.
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxMask : public wxObject
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{
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public:
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wxMask();
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// Copy constructor
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wxMask(const wxMask &mask);
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// Construct a mask from a bitmap and a colour indicating the transparent
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// area
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wxMask(const wxBitmap& bitmap, const wxColour& colour);
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// Construct a mask from a bitmap and a palette index indicating the
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// transparent area
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wxMask(const wxBitmap& bitmap, int paletteIndex);
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// Construct a mask from a mono bitmap (copies the bitmap).
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wxMask(const wxBitmap& bitmap);
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// construct a mask from the givne bitmap handle
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wxMask(WXHBITMAP hbmp) { m_maskBitmap = hbmp; }
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virtual ~wxMask();
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bool Create(const wxBitmap& bitmap, const wxColour& colour);
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bool Create(const wxBitmap& bitmap, int paletteIndex);
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bool Create(const wxBitmap& bitmap);
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wxBitmap GetBitmap() const;
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// Implementation
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WXHBITMAP GetMaskBitmap() const { return m_maskBitmap; }
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void SetMaskBitmap(WXHBITMAP bmp) { m_maskBitmap = bmp; }
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protected:
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WXHBITMAP m_maskBitmap;
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wxDECLARE_DYNAMIC_CLASS(wxMask);
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};
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// ----------------------------------------------------------------------------
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// wxBitmapHandler is a class which knows how to load/save bitmaps to/from file
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// NOTE: for wxMSW we don't use the wxBitmapHandler class declared in bitmap.h!
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxBitmapHandler : public wxGDIImageHandler
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{
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public:
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wxBitmapHandler() { }
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wxBitmapHandler(const wxString& name, const wxString& ext, wxBitmapType type)
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: wxGDIImageHandler(name, ext, type) { }
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// implement wxGDIImageHandler's pure virtuals:
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virtual bool Create(wxGDIImage *image,
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const void* data,
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wxBitmapType type,
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int width, int height, int depth = 1) wxOVERRIDE;
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virtual bool Load(wxGDIImage *image,
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const wxString& name,
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wxBitmapType type,
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int desiredWidth, int desiredHeight) wxOVERRIDE;
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virtual bool Save(const wxGDIImage *image,
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const wxString& name,
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wxBitmapType type) const wxOVERRIDE;
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// make wxBitmapHandler compatible with the wxBitmapHandler interface
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// declared in bitmap.h, even if it's derived from wxGDIImageHandler:
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virtual bool Create(wxBitmap *bitmap,
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const void* data,
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wxBitmapType type,
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int width, int height, int depth = 1);
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virtual bool LoadFile(wxBitmap *bitmap,
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const wxString& name,
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wxBitmapType type,
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int desiredWidth, int desiredHeight);
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virtual bool SaveFile(const wxBitmap *bitmap,
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const wxString& name,
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wxBitmapType type,
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const wxPalette *palette = NULL) const;
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private:
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wxDECLARE_DYNAMIC_CLASS(wxBitmapHandler);
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};
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#endif
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// _WX_BITMAP_H_
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