include/wx/bitmap.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/bitmap.h
   3 // Purpose:     wxBitmap class interface
   4 // Author:      Vaclav Slavik
   5 // Modified by:
   6 // Created:     22.04.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_BITMAP_H_BASE_
  13 #define _WX_BITMAP_H_BASE_
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/string.h"
  20 #include "wx/gdicmn.h"  // for wxBitmapType
  21 #include "wx/colour.h"
  22
  23 class WXDLLIMPEXP_FWD_CORE wxBitmap;
  24 class WXDLLIMPEXP_FWD_CORE wxBitmapHandler;
  25 class WXDLLIMPEXP_FWD_CORE wxIcon;
  26 class WXDLLIMPEXP_FWD_CORE wxImage;
  27 class WXDLLIMPEXP_FWD_CORE wxMask;
  28 class WXDLLIMPEXP_FWD_CORE wxPalette;
  29
  30 // ----------------------------------------------------------------------------
  31 // wxVariant support
  32 // ----------------------------------------------------------------------------
  33
  34 #if wxUSE_VARIANT
  35 #include "wx/variant.h"
  36 DECLARE_VARIANT_OBJECT_EXPORTED(wxBitmap,WXDLLIMPEXP_CORE)
  37 #endif
  38
  39 // ----------------------------------------------------------------------------
  40 // wxMask represents the transparent area of the bitmap
  41 // ----------------------------------------------------------------------------
  42
  43 // TODO: all implementation of wxMask, except the generic one,
  44 //       do not derive from wxMaskBase,,, they should
  45 class WXDLLIMPEXP_CORE wxMaskBase : public wxObject
  46 {
  47 public:
  48     // create the mask from bitmap pixels of the given colour
  49     bool Create(const wxBitmap& bitmap, const wxColour& colour);
  50
  51 #if wxUSE_PALETTE
  52     // create the mask from bitmap pixels with the given palette index
  53     bool Create(const wxBitmap& bitmap, int paletteIndex);
  54 #endif // wxUSE_PALETTE
  55
  56     // create the mask from the given mono bitmap
  57     bool Create(const wxBitmap& bitmap);
  58
  59 protected:
  60     // this function is called from Create() to free the existing mask data
  61     virtual void FreeData() = 0;
  62
  63     // these functions must be overridden to implement the corresponding public
  64     // Create() methods, they shouldn't call FreeData() as it's already called
  65     // by the public wrappers
  66     virtual bool InitFromColour(const wxBitmap& bitmap,
  67                                 const wxColour& colour) = 0;
  68     virtual bool InitFromMonoBitmap(const wxBitmap& bitmap) = 0;
  69 };
  70
  71 #if defined(__WXMGL__) || \
  72     defined(__WXDFB__) || \
  73     defined(__WXMAC__) || \
  74     defined(__WXGTK__) || \
  75     defined(__WXCOCOA__) || \
  76     defined(__WXMOTIF__) || \
  77     defined(__WXX11__)
  78     #define wxUSE_BITMAP_BASE 1
  79 #else
  80     #define wxUSE_BITMAP_BASE 0
  81 #endif
  82
  83 // a more readable way to tell
  84 #define wxBITMAP_SCREEN_DEPTH       (-1)
  85
  86
  87 // All ports except wxMSW,wxOS2,wxPalmOS use wxBitmapHandler and wxBitmapBase as base class
  88 // for wxBitmapHandler; wxMSW,wxOS2,wxPalmOS use wxGDIImageHandler as base class
  89 // since it allows some code reuse there.
  90 #if wxUSE_BITMAP_BASE
  91
  92 // ----------------------------------------------------------------------------
  93 // wxBitmapHandler: class which knows how to create/load/save bitmaps in
  94 // different formats
  95 // ----------------------------------------------------------------------------
  96
  97 class WXDLLIMPEXP_CORE wxBitmapHandler : public wxObject
  98 {
  99 public:
 100     wxBitmapHandler() { m_type = wxBITMAP_TYPE_INVALID; }
 101     virtual ~wxBitmapHandler() { }
 102
 103     // NOTE: the following functions should be pure virtuals, but they aren't
 104     //       because otherwise almost all ports would have to implement
 105     //       them as "return false"...
 106
 107     virtual bool Create(wxBitmap *WXUNUSED(bitmap), const void* WXUNUSED(data),
 108                          wxBitmapType WXUNUSED(type), int WXUNUSED(width), int WXUNUSED(height),
 109                          int WXUNUSED(depth) = 1)
 110         { return false; }
 111
 112     virtual bool LoadFile(wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name),
 113                            wxBitmapType WXUNUSED(type), int WXUNUSED(desiredWidth),
 114                            int WXUNUSED(desiredHeight))
 115         { return false; }
 116
 117     virtual bool SaveFile(const wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name),
 118                            wxBitmapType WXUNUSED(type), const wxPalette *WXUNUSED(palette) = NULL) const
 119         { return false; }
 120
 121     void SetName(const wxString& name)      { m_name = name; }
 122     void SetExtension(const wxString& ext)  { m_extension = ext; }
 123     void SetType(wxBitmapType type)         { m_type = type; }
 124     const wxString& GetName() const         { return m_name; }
 125     const wxString& GetExtension() const    { return m_extension; }
 126     wxBitmapType GetType() const            { return m_type; }
 127
 128 private:
 129     wxString      m_name;
 130     wxString      m_extension;
 131     wxBitmapType  m_type;
 132
 133     DECLARE_ABSTRACT_CLASS(wxBitmapHandler)
 134 };
 135
 136
 137 // ----------------------------------------------------------------------------
 138 // wxBitmap: class which represents platform-dependent bitmap (unlike wxImage)
 139 // ----------------------------------------------------------------------------
 140
 141 class WXDLLIMPEXP_CORE wxBitmapBase : public wxGDIObject
 142 {
 143 public:
 144     /*
 145     Derived class must implement these:
 146
 147     wxBitmap();
 148     wxBitmap(const wxBitmap& bmp);
 149     wxBitmap(const char bits[], int width, int height, int depth = 1);
 150     wxBitmap(int width, int height, int depth = wxBITMAP_SCREEN_DEPTH);
 151     wxBitmap(const char* const* bits);
 152     wxBitmap(const wxString &filename, wxBitmapType type = wxBITMAP_TYPE_XPM);
 153     wxBitmap(const wxImage& image, int depth = wxBITMAP_SCREEN_DEPTH);
 154
 155     static void InitStandardHandlers();
 156     */
 157
 158     virtual bool Create(int width, int height, int depth = wxBITMAP_SCREEN_DEPTH) = 0;
 159
 160     virtual int GetHeight() const = 0;
 161     virtual int GetWidth() const = 0;
 162     virtual int GetDepth() const = 0;
 163
 164     wxSize GetSize() const
 165         { return wxSize(GetWidth(), GetHeight()); }
 166
 167 #if wxUSE_IMAGE
 168     virtual wxImage ConvertToImage() const = 0;
 169 #endif // wxUSE_IMAGE
 170
 171     virtual wxMask *GetMask() const = 0;
 172     virtual void SetMask(wxMask *mask) = 0;
 173
 174     virtual wxBitmap GetSubBitmap(const wxRect& rect) const = 0;
 175
 176     virtual bool SaveFile(const wxString &name, wxBitmapType type,
 177                           const wxPalette *palette = NULL) const = 0;
 178     virtual bool LoadFile(const wxString &name, wxBitmapType type) = 0;
 179
 180     /*
 181        If raw bitmap access is supported (see wx/rawbmp.h), the following
 182        methods should be implemented:
 183
 184        virtual bool GetRawData(wxRawBitmapData *data) = 0;
 185        virtual void UngetRawData(wxRawBitmapData *data) = 0;
 186      */
 187
 188 #if wxUSE_PALETTE
 189     virtual wxPalette *GetPalette() const = 0;
 190     virtual void SetPalette(const wxPalette& palette) = 0;
 191 #endif // wxUSE_PALETTE
 192
 193     // copies the contents and mask of the given (colour) icon to the bitmap
 194     virtual bool CopyFromIcon(const wxIcon& icon) = 0;
 195
 196     // implementation:
 197     virtual void SetHeight(int height) = 0;
 198     virtual void SetWidth(int width) = 0;
 199     virtual void SetDepth(int depth) = 0;
 200
 201     // Format handling
 202     static inline wxList& GetHandlers() { return sm_handlers; }
 203     static void AddHandler(wxBitmapHandler *handler);
 204     static void InsertHandler(wxBitmapHandler *handler);
 205     static bool RemoveHandler(const wxString& name);
 206     static wxBitmapHandler *FindHandler(const wxString& name);
 207     static wxBitmapHandler *FindHandler(const wxString& extension, wxBitmapType bitmapType);
 208     static wxBitmapHandler *FindHandler(wxBitmapType bitmapType);
 209
 210     //static void InitStandardHandlers();
 211     //  (wxBitmap must implement this one)
 212
 213     static void CleanUpHandlers();
 214
 215     // this method is only used by the generic implementation of wxMask
 216     // currently but could be useful elsewhere in the future: it can be
 217     // overridden to quantize the colour to correspond to bitmap colour depth
 218     // if necessary; default implementation simply returns the colour as is
 219     virtual wxColour QuantizeColour(const wxColour& colour) const
 220     {
 221         return colour;
 222     }
 223
 224 protected:
 225     static wxList sm_handlers;
 226
 227     DECLARE_ABSTRACT_CLASS(wxBitmapBase)
 228 };
 229
 230 #endif // wxUSE_BITMAP_BASE
 231
 232
 233 // the wxBITMAP_DEFAULT_TYPE constant defines the default argument value
 234 // for wxBitmap's ctor and wxBitmap::LoadFile() functions.
 235 #if defined(__WXPALMOS__)
 236     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_BMP_RESOURCE
 237     #include "wx/palmos/bitmap.h"
 238 #elif defined(__WXMSW__)
 239     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_BMP_RESOURCE
 240     #include "wx/msw/bitmap.h"
 241 #elif defined(__WXMOTIF__)
 242     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_XPM
 243     #include "wx/x11/bitmap.h"
 244 #elif defined(__WXGTK20__)
 245     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_XPM
 246     #include "wx/gtk/bitmap.h"
 247 #elif defined(__WXGTK__)
 248     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_XPM
 249     #include "wx/gtk1/bitmap.h"
 250 #elif defined(__WXX11__)
 251     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_XPM
 252     #include "wx/x11/bitmap.h"
 253 #elif defined(__WXMGL__)
 254     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_RESOURCE
 255     #include "wx/mgl/bitmap.h"
 256 #elif defined(__WXDFB__)
 257     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_RESOURCE
 258     #include "wx/dfb/bitmap.h"
 259 #elif defined(__WXMAC__)
 260     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_PICT_RESOURCE
 261     #include "wx/osx/bitmap.h"
 262 #elif defined(__WXCOCOA__)
 263     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_BMP_RESOURCE
 264     #include "wx/cocoa/bitmap.h"
 265 #elif defined(__WXPM__)
 266     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_BMP_RESOURCE
 267     #include "wx/os2/bitmap.h"
 268 #endif
 269
 270 // we must include generic mask.h after wxBitmap definition
 271 #if defined(__WXMGL__) || defined(__WXDFB__)
 272     #define wxUSE_GENERIC_MASK 1
 273 #else
 274     #define wxUSE_GENERIC_MASK 0
 275 #endif
 276
 277 #if wxUSE_GENERIC_MASK
 278     #include "wx/generic/mask.h"
 279 #endif
 280
 281 #endif // _WX_BITMAP_H_BASE_