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 #include "wx/image.h"
  23
  24 class WXDLLIMPEXP_FWD_CORE wxBitmap;
  25 class WXDLLIMPEXP_FWD_CORE wxBitmapHandler;
  26 class WXDLLIMPEXP_FWD_CORE wxIcon;
  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(__WXDFB__) || \
  72     defined(__WXMAC__) || \
  73     defined(__WXGTK__) || \
  74     defined(__WXCOCOA__) || \
  75     defined(__WXMOTIF__) || \
  76     defined(__WXX11__)
  77     #define wxUSE_BITMAP_BASE 1
  78 #else
  79     #define wxUSE_BITMAP_BASE 0
  80 #endif
  81
  82 // a more readable way to tell
  83 #define wxBITMAP_SCREEN_DEPTH       (-1)
  84
  85
  86 // All ports except wxMSW and wxOS2 use wxBitmapHandler and wxBitmapBase as
  87 // base class for wxBitmapHandler; wxMSW and wxOS2 use wxGDIImageHandler as
  88 // base class since it allows some code reuse there.
  89 #if wxUSE_BITMAP_BASE
  90
  91 // ----------------------------------------------------------------------------
  92 // wxBitmapHandler: class which knows how to create/load/save bitmaps in
  93 // different formats
  94 // ----------------------------------------------------------------------------
  95
  96 class WXDLLIMPEXP_CORE wxBitmapHandler : public wxObject
  97 {
  98 public:
  99     wxBitmapHandler() { m_type = wxBITMAP_TYPE_INVALID; }
 100     virtual ~wxBitmapHandler() { }
 101
 102     // NOTE: the following functions should be pure virtuals, but they aren't
 103     //       because otherwise almost all ports would have to implement
 104     //       them as "return false"...
 105
 106     virtual bool Create(wxBitmap *WXUNUSED(bitmap), const void* WXUNUSED(data),
 107                          wxBitmapType WXUNUSED(type), int WXUNUSED(width), int WXUNUSED(height),
 108                          int WXUNUSED(depth) = 1)
 109         { return false; }
 110
 111     virtual bool LoadFile(wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name),
 112                            wxBitmapType WXUNUSED(type), int WXUNUSED(desiredWidth),
 113                            int WXUNUSED(desiredHeight))
 114         { return false; }
 115
 116     virtual bool SaveFile(const wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name),
 117                            wxBitmapType WXUNUSED(type), const wxPalette *WXUNUSED(palette) = NULL) const
 118         { return false; }
 119
 120     void SetName(const wxString& name)      { m_name = name; }
 121     void SetExtension(const wxString& ext)  { m_extension = ext; }
 122     void SetType(wxBitmapType type)         { m_type = type; }
 123     const wxString& GetName() const         { return m_name; }
 124     const wxString& GetExtension() const    { return m_extension; }
 125     wxBitmapType GetType() const            { return m_type; }
 126
 127 private:
 128     wxString      m_name;
 129     wxString      m_extension;
 130     wxBitmapType  m_type;
 131
 132     DECLARE_ABSTRACT_CLASS(wxBitmapHandler)
 133 };
 134
 135
 136 // ----------------------------------------------------------------------------
 137 // wxBitmap: class which represents platform-dependent bitmap (unlike wxImage)
 138 // ----------------------------------------------------------------------------
 139
 140 class WXDLLIMPEXP_CORE wxBitmapBase : public wxGDIObject
 141 {
 142 public:
 143     /*
 144     Derived class must implement these:
 145
 146     wxBitmap();
 147     wxBitmap(const wxBitmap& bmp);
 148     wxBitmap(const char bits[], int width, int height, int depth = 1);
 149     wxBitmap(int width, int height, int depth = wxBITMAP_SCREEN_DEPTH);
 150     wxBitmap(const wxSize& sz, 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     virtual bool Create(const wxSize& sz, int depth = wxBITMAP_SCREEN_DEPTH) = 0;
 160
 161     virtual int GetHeight() const = 0;
 162     virtual int GetWidth() const = 0;
 163     virtual int GetDepth() const = 0;
 164
 165     wxSize GetSize() const
 166         { return wxSize(GetWidth(), GetHeight()); }
 167
 168 #if wxUSE_IMAGE
 169     virtual wxImage ConvertToImage() const = 0;
 170
 171     // Convert to disabled (dimmed) bitmap.
 172     wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
 173 #endif // wxUSE_IMAGE
 174
 175     virtual wxMask *GetMask() const = 0;
 176     virtual void SetMask(wxMask *mask) = 0;
 177
 178     virtual wxBitmap GetSubBitmap(const wxRect& rect) const = 0;
 179
 180     virtual bool SaveFile(const wxString &name, wxBitmapType type,
 181                           const wxPalette *palette = NULL) const = 0;
 182     virtual bool LoadFile(const wxString &name, wxBitmapType type) = 0;
 183
 184     /*
 185        If raw bitmap access is supported (see wx/rawbmp.h), the following
 186        methods should be implemented:
 187
 188        virtual bool GetRawData(wxRawBitmapData *data) = 0;
 189        virtual void UngetRawData(wxRawBitmapData *data) = 0;
 190      */
 191
 192 #if wxUSE_PALETTE
 193     virtual wxPalette *GetPalette() const = 0;
 194     virtual void SetPalette(const wxPalette& palette) = 0;
 195 #endif // wxUSE_PALETTE
 196
 197     // copies the contents and mask of the given (colour) icon to the bitmap
 198     virtual bool CopyFromIcon(const wxIcon& icon) = 0;
 199
 200     // implementation:
 201     virtual void SetHeight(int height) = 0;
 202     virtual void SetWidth(int width) = 0;
 203     virtual void SetDepth(int depth) = 0;
 204
 205     // Format handling
 206     static inline wxList& GetHandlers() { return sm_handlers; }
 207     static void AddHandler(wxBitmapHandler *handler);
 208     static void InsertHandler(wxBitmapHandler *handler);
 209     static bool RemoveHandler(const wxString& name);
 210     static wxBitmapHandler *FindHandler(const wxString& name);
 211     static wxBitmapHandler *FindHandler(const wxString& extension, wxBitmapType bitmapType);
 212     static wxBitmapHandler *FindHandler(wxBitmapType bitmapType);
 213
 214     //static void InitStandardHandlers();
 215     //  (wxBitmap must implement this one)
 216
 217     static void CleanUpHandlers();
 218
 219     // this method is only used by the generic implementation of wxMask
 220     // currently but could be useful elsewhere in the future: it can be
 221     // overridden to quantize the colour to correspond to bitmap colour depth
 222     // if necessary; default implementation simply returns the colour as is
 223     virtual wxColour QuantizeColour(const wxColour& colour) const
 224     {
 225         return colour;
 226     }
 227
 228 protected:
 229     static wxList sm_handlers;
 230
 231     DECLARE_ABSTRACT_CLASS(wxBitmapBase)
 232 };
 233
 234 #endif // wxUSE_BITMAP_BASE
 235
 236
 237 // the wxBITMAP_DEFAULT_TYPE constant defines the default argument value
 238 // for wxBitmap's ctor and wxBitmap::LoadFile() functions.
 239 #if defined(__WXMSW__)
 240     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_BMP_RESOURCE
 241     #include "wx/msw/bitmap.h"
 242 #elif defined(__WXMOTIF__)
 243     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_XPM
 244     #include "wx/x11/bitmap.h"
 245 #elif defined(__WXGTK20__)
 246     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_XPM
 247     #include "wx/gtk/bitmap.h"
 248 #elif defined(__WXGTK__)
 249     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_XPM
 250     #include "wx/gtk1/bitmap.h"
 251 #elif defined(__WXX11__)
 252     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_XPM
 253     #include "wx/x11/bitmap.h"
 254 #elif defined(__WXDFB__)
 255     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_BMP_RESOURCE
 256     #include "wx/dfb/bitmap.h"
 257 #elif defined(__WXMAC__)
 258     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_PICT_RESOURCE
 259     #include "wx/osx/bitmap.h"
 260 #elif defined(__WXCOCOA__)
 261     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_BMP_RESOURCE
 262     #include "wx/cocoa/bitmap.h"
 263 #elif defined(__WXPM__)
 264     #define wxBITMAP_DEFAULT_TYPE    wxBITMAP_TYPE_BMP_RESOURCE
 265     #include "wx/os2/bitmap.h"
 266 #endif
 267
 268 #if wxUSE_IMAGE
 269 inline
 270 wxBitmap
 271 #if wxUSE_BITMAP_BASE
 272 wxBitmapBase::
 273 #else
 274 wxBitmap::
 275 #endif
 276 ConvertToDisabled(unsigned char brightness) const
 277 {
 278     return ConvertToImage().ConvertToDisabled(brightness);
 279 }
 280 #endif // wxUSE_IMAGE
 281
 282 // we must include generic mask.h after wxBitmap definition
 283 #if defined(__WXDFB__)
 284     #define wxUSE_GENERIC_MASK 1
 285 #else
 286     #define wxUSE_GENERIC_MASK 0
 287 #endif
 288
 289 #if wxUSE_GENERIC_MASK
 290     #include "wx/generic/mask.h"
 291 #endif
 292
 293 #endif // _WX_BITMAP_H_BASE_