synchronize GTK2 minimum version in docs

[wxWidgets.git] / include / wx / msw / dib.h

diff --git a/include/wx/msw/dib.h b/include/wx/msw/dib.h
index 6a2a40a02077f88e3d253f9f1ea55a929fa2e292..fcfce370fddfda998085950e56983d10317745a8 100644 (file)
--- a/include/wx/msw/dib.h
+++ b/include/wx/msw/dib.h
@@ -5,23 +5,28 @@
 // Modified by:
 // Created:     03.03.03 (replaces the old file with the same name)
 // RCS-ID:      $Id$
-// Copyright:   (c) 1997-2003 wxWindows team
+// Copyright:   (c) 1997-2003 wxWidgets team
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_MSW_DIB_H_
 #define _WX_MSW_DIB_H_
 
-class WXDLLEXPORT wxBitmap;
-class WXDLLEXPORT wxPalette;
+class WXDLLIMPEXP_FWD_CORE wxPalette;
 
 #include "wx/msw/private.h"
 
+#if wxUSE_WXDIB
+
+#ifdef __WXMSW__
+    #include "wx/bitmap.h"
+#endif // __WXMSW__
+
 // ----------------------------------------------------------------------------
 // wxDIB: represents a DIB section
 // ----------------------------------------------------------------------------
 
-class WXDLLEXPORT wxDIB
+class WXDLLIMPEXP_CORE wxDIB
 {
 public:
     // ctors and such
@@ -35,9 +40,15 @@ public:
     wxDIB(int width, int height, int depth)
         { Init(); (void)Create(width, height, depth); }
 
+#ifdef __WXMSW__
     // create a DIB from the DDB
     wxDIB(const wxBitmap& bmp)
         { Init(); (void)Create(bmp); }
+#endif // __WXMSW__
+
+    // create a DIB from the Windows DDB
+    wxDIB(HBITMAP hbmp)
+        { Init(); (void)Create(hbmp); }
 
     // load a DIB from file (any depth is supoprted here unlike above)
     //
@@ -47,7 +58,10 @@ public:
 
     // same as the corresponding ctors but with return value
     bool Create(int width, int height, int depth);
-    bool Create(const wxBitmap& bmp);
+#ifdef __WXMSW__
+    bool Create(const wxBitmap& bmp) { return Create(GetHbitmapOf(bmp)); }
+#endif
+    bool Create(HBITMAP hbmp);
     bool Load(const wxString& filename);
 
     // dtor is not virtual, this class is not meant to be used polymorphically
@@ -57,10 +71,12 @@ public:
     // operations
     // ----------
 
-    // create a bitmap compatiblr with the given HDC (or screen by default) and
+#ifndef __WXWINCE__
+    // create a bitmap compatible with the given HDC (or screen by default) and
     // return its handle, the caller is responsible for freeing it (using
     // DeleteObject())
     HBITMAP CreateDDB(HDC hdc = 0) const;
+#endif // !__WXWINCE__
 
     // get the handle from the DIB and reset it, i.e. this object won't destroy
     // the DIB after this (but the caller should do it)
@@ -94,15 +110,17 @@ public:
 
     // get raw pointer to bitmap bits, you should know what you do if you
     // decide to use it
-    void *GetData() const { DoGetObject(); return m_data; }
+    unsigned char *GetData() const
+        { DoGetObject(); return (unsigned char *)m_data; }
 
 
     // HBITMAP conversion
     // ------------------
 
-    // these functions are only used by wxWindows internally right now, please
+    // these functions are only used by wxWidgets internally right now, please
     // don't use them directly if possible as they're subject to change
 
+#ifndef __WXWINCE__
     // creates a DDB compatible with the given (or screen) DC from either
     // a plain DIB or a DIB section (in which case the last parameter must be
     // non NULL)
@@ -120,18 +138,35 @@ public:
     // function (this overload is needed for wxBitmapDataObject code in
     // src/msw/ole/dataobj.cpp)
     static size_t ConvertFromBitmap(BITMAPINFO *pbi, HBITMAP hbmp);
+#endif // __WXWINCE__
 
 
     // wxImage conversion
     // ------------------
 
 #if wxUSE_IMAGE
-    // create a DIB from the given image, the DIB will be either 24 or 32 (if
-    // the image has alpha channel) bpp
-    wxDIB(const wxImage& image) { Init(); (void)Create(image); }
+    // Possible formats for DIBs created by the functions below.
+    enum PixelFormat
+    {
+        PixelFormat_PreMultiplied = 0,
+        PixelFormat_NotPreMultiplied = 1
+    };
+
+    // Create a DIB from the given image, the DIB will be either 24 or 32 (if
+    // the image has alpha channel) bpp.
+    //
+    // By default the DIB stores pixel data in pre-multiplied format so that it
+    // can be used with ::AlphaBlend() but it is also possible to disable
+    // pre-multiplication for the DIB to be usable with ImageList_Draw() which
+    // does pre-multiplication internally.
+    wxDIB(const wxImage& image, PixelFormat pf = PixelFormat_PreMultiplied)
+    {
+        Init();
+        (void)Create(image, pf);
+    }
 
     // same as the above ctor but with the return code
-    bool Create(const wxImage& image);
+    bool Create(const wxImage& image, PixelFormat pf = PixelFormat_PreMultiplied);
 
     // create wxImage having the same data as this DIB
     wxImage ConvertToImage() const;
@@ -156,6 +191,11 @@ private:
     // free resources
     void Free();
 
+    // initialize the contents from the provided DDB (Create() must have been
+    // already called)
+    bool CopyFromDDB(HBITMAP hbmp);
+
+
     // the DIB section handle, 0 if invalid
     HBITMAP m_handle;
 
@@ -225,5 +265,8 @@ inline wxDIB::~wxDIB()
     Free();
 }
 
+#endif
+    // wxUSE_WXDIB
+
 #endif // _WX_MSW_DIB_H_