322 lines
11 KiB
C++
322 lines
11 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/bitmap.h
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// Purpose: wxBitmap class interface
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// Author: Vaclav Slavik
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// Modified by:
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// Created: 22.04.01
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// Copyright: (c) wxWidgets team
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_BITMAP_H_BASE_
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#define _WX_BITMAP_H_BASE_
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "wx/string.h"
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#include "wx/gdicmn.h" // for wxBitmapType
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#include "wx/colour.h"
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#include "wx/image.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 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 wxDC;
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// ----------------------------------------------------------------------------
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// wxVariant support
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// ----------------------------------------------------------------------------
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#if wxUSE_VARIANT
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#include "wx/variant.h"
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DECLARE_VARIANT_OBJECT_EXPORTED(wxBitmap,WXDLLIMPEXP_CORE)
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#endif
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// ----------------------------------------------------------------------------
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// wxMask represents the transparent area of the bitmap
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// ----------------------------------------------------------------------------
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// TODO: all implementation of wxMask, except the generic one,
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// do not derive from wxMaskBase,,, they should
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class WXDLLIMPEXP_CORE wxMaskBase : public wxObject
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{
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public:
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// create the mask from bitmap pixels of the given colour
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bool Create(const wxBitmap& bitmap, const wxColour& colour);
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#if wxUSE_PALETTE
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// create the mask from bitmap pixels with the given palette index
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bool Create(const wxBitmap& bitmap, int paletteIndex);
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#endif // wxUSE_PALETTE
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// create the mask from the given mono bitmap
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bool Create(const wxBitmap& bitmap);
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protected:
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// this function is called from Create() to free the existing mask data
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virtual void FreeData() = 0;
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// these functions must be overridden to implement the corresponding public
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// Create() methods, they shouldn't call FreeData() as it's already called
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// by the public wrappers
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virtual bool InitFromColour(const wxBitmap& bitmap,
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const wxColour& colour) = 0;
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virtual bool InitFromMonoBitmap(const wxBitmap& bitmap) = 0;
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};
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#if defined(__WXDFB__) || \
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defined(__WXMAC__) || \
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defined(__WXGTK__) || \
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defined(__WXMOTIF__) || \
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defined(__WXX11__) || \
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defined(__WXQT__)
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#define wxUSE_BITMAP_BASE 1
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#else
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#define wxUSE_BITMAP_BASE 0
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#endif
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// a more readable way to tell
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#define wxBITMAP_SCREEN_DEPTH (-1)
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// ----------------------------------------------------------------------------
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// wxBitmapHelpers: container for various bitmap methods common to all ports.
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// ----------------------------------------------------------------------------
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// Unfortunately, currently wxBitmap does not inherit from wxBitmapBase on all
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// platforms and this is not easy to fix. So we extract at least some common
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// methods into this class from which both wxBitmapBase (and hence wxBitmap on
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// all platforms where it does inherit from it) and wxBitmap in wxMSW and other
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// exceptional ports (only wxPM and old wxCocoa) inherit.
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class WXDLLIMPEXP_CORE wxBitmapHelpers
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{
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public:
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// Create a new wxBitmap from the PNG data in the given buffer.
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static wxBitmap NewFromPNGData(const void* data, size_t size);
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};
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// All ports except wxMSW use wxBitmapHandler and wxBitmapBase as
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// base class for wxBitmapHandler; wxMSW uses wxGDIImageHandler as
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// base class since it allows some code reuse there.
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#if wxUSE_BITMAP_BASE
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// ----------------------------------------------------------------------------
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// wxBitmapHandler: class which knows how to create/load/save bitmaps in
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// different formats
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxBitmapHandler : public wxObject
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{
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public:
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wxBitmapHandler() { m_type = wxBITMAP_TYPE_INVALID; }
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virtual ~wxBitmapHandler() { }
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// NOTE: the following functions should be pure virtuals, but they aren't
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// because otherwise almost all ports would have to implement
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// them as "return false"...
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virtual bool Create(wxBitmap *WXUNUSED(bitmap), const void* WXUNUSED(data),
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wxBitmapType WXUNUSED(type), int WXUNUSED(width), int WXUNUSED(height),
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int WXUNUSED(depth) = 1)
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{ return false; }
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virtual bool LoadFile(wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name),
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wxBitmapType WXUNUSED(type), int WXUNUSED(desiredWidth),
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int WXUNUSED(desiredHeight))
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{ return false; }
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virtual bool SaveFile(const wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name),
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wxBitmapType WXUNUSED(type), const wxPalette *WXUNUSED(palette) = NULL) const
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{ return false; }
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void SetName(const wxString& name) { m_name = name; }
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void SetExtension(const wxString& ext) { m_extension = ext; }
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void SetType(wxBitmapType type) { m_type = type; }
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const wxString& GetName() const { return m_name; }
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const wxString& GetExtension() const { return m_extension; }
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wxBitmapType GetType() const { return m_type; }
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private:
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wxString m_name;
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wxString m_extension;
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wxBitmapType m_type;
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wxDECLARE_ABSTRACT_CLASS(wxBitmapHandler);
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};
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// ----------------------------------------------------------------------------
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// wxBitmap: class which represents platform-dependent bitmap (unlike wxImage)
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxBitmapBase : public wxGDIObject,
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public wxBitmapHelpers
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{
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public:
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/*
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Derived class must implement these:
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wxBitmap();
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wxBitmap(const wxBitmap& bmp);
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wxBitmap(const char bits[], int width, int height, int depth = 1);
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wxBitmap(int width, int height, int depth = wxBITMAP_SCREEN_DEPTH);
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wxBitmap(const wxSize& sz, int depth = wxBITMAP_SCREEN_DEPTH);
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wxBitmap(const char* const* bits);
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wxBitmap(const wxString &filename, wxBitmapType type = wxBITMAP_TYPE_XPM);
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wxBitmap(const wxImage& image, int depth = wxBITMAP_SCREEN_DEPTH);
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static void InitStandardHandlers();
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*/
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virtual bool Create(int width, int height, int depth = wxBITMAP_SCREEN_DEPTH) = 0;
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virtual bool Create(const wxSize& sz, int depth = wxBITMAP_SCREEN_DEPTH) = 0;
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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 int GetHeight() const = 0;
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virtual int GetWidth() const = 0;
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virtual int GetDepth() const = 0;
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wxSize GetSize() const
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{ return wxSize(GetWidth(), GetHeight()); }
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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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#if wxUSE_IMAGE
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virtual wxImage ConvertToImage() const = 0;
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// Convert to disabled (dimmed) bitmap.
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wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
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#endif // wxUSE_IMAGE
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virtual wxMask *GetMask() const = 0;
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virtual void SetMask(wxMask *mask) = 0;
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virtual wxBitmap GetSubBitmap(const wxRect& rect) const = 0;
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virtual bool SaveFile(const wxString &name, wxBitmapType type,
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const wxPalette *palette = NULL) const = 0;
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virtual bool LoadFile(const wxString &name, wxBitmapType type) = 0;
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/*
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If raw bitmap access is supported (see wx/rawbmp.h), the following
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methods should be implemented:
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virtual bool GetRawData(wxRawBitmapData *data) = 0;
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virtual void UngetRawData(wxRawBitmapData *data) = 0;
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*/
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#if wxUSE_PALETTE
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virtual wxPalette *GetPalette() const = 0;
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virtual void SetPalette(const wxPalette& palette) = 0;
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#endif // wxUSE_PALETTE
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// copies the contents and mask of the given (colour) icon to the bitmap
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virtual bool CopyFromIcon(const wxIcon& icon) = 0;
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// implementation:
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virtual void SetHeight(int height) = 0;
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virtual void SetWidth(int width) = 0;
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virtual void SetDepth(int depth) = 0;
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// Format handling
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static inline wxList& GetHandlers() { return sm_handlers; }
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static void AddHandler(wxBitmapHandler *handler);
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static void InsertHandler(wxBitmapHandler *handler);
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static bool RemoveHandler(const wxString& name);
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static wxBitmapHandler *FindHandler(const wxString& name);
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static wxBitmapHandler *FindHandler(const wxString& extension, wxBitmapType bitmapType);
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static wxBitmapHandler *FindHandler(wxBitmapType bitmapType);
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//static void InitStandardHandlers();
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// (wxBitmap must implement this one)
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static void CleanUpHandlers();
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// this method is only used by the generic implementation of wxMask
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// currently but could be useful elsewhere in the future: it can be
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// overridden to quantize the colour to correspond to bitmap colour depth
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// if necessary; default implementation simply returns the colour as is
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virtual wxColour QuantizeColour(const wxColour& colour) const
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{
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return colour;
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}
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protected:
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static wxList sm_handlers;
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wxDECLARE_ABSTRACT_CLASS(wxBitmapBase);
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};
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#endif // wxUSE_BITMAP_BASE
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// the wxBITMAP_DEFAULT_TYPE constant defines the default argument value
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// for wxBitmap's ctor and wxBitmap::LoadFile() functions.
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#if defined(__WXMSW__)
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_BMP_RESOURCE
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#include "wx/msw/bitmap.h"
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#elif defined(__WXMOTIF__)
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_XPM
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#include "wx/x11/bitmap.h"
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#elif defined(__WXGTK20__)
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#ifdef __WINDOWS__
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_BMP_RESOURCE
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#else
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_XPM
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#endif
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#include "wx/gtk/bitmap.h"
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#elif defined(__WXGTK__)
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_XPM
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#include "wx/gtk1/bitmap.h"
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#elif defined(__WXX11__)
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_XPM
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#include "wx/x11/bitmap.h"
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#elif defined(__WXDFB__)
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_BMP_RESOURCE
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#include "wx/dfb/bitmap.h"
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#elif defined(__WXMAC__)
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_PICT_RESOURCE
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#include "wx/osx/bitmap.h"
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#elif defined(__WXQT__)
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#define wxBITMAP_DEFAULT_TYPE wxBITMAP_TYPE_XPM
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#include "wx/qt/bitmap.h"
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#endif
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#if wxUSE_IMAGE
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inline
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wxBitmap
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#if wxUSE_BITMAP_BASE
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wxBitmapBase::
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#else
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wxBitmap::
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#endif
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ConvertToDisabled(unsigned char brightness) const
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{
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const wxImage imgDisabled = ConvertToImage().ConvertToDisabled(brightness);
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return wxBitmap(imgDisabled, -1, GetScaleFactor());
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}
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#endif // wxUSE_IMAGE
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// we must include generic mask.h after wxBitmap definition
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#if defined(__WXDFB__)
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#define wxUSE_GENERIC_MASK 1
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#else
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#define wxUSE_GENERIC_MASK 0
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#endif
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#if wxUSE_GENERIC_MASK
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#include "wx/generic/mask.h"
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#endif
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#endif // _WX_BITMAP_H_BASE_
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