Added simple implementation of (Get|Unget)RawData.

Premultipied alpha is not handled at this point.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@24716 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/cocoa/bitmap.h

@@ -19,6 +19,7 @@ class WXDLLEXPORT wxBitmap;
 class WXDLLEXPORT wxIcon;
 class WXDLLEXPORT wxCursor;
 class WXDLLEXPORT wxImage;
+class WXDLLEXPORT wxPixelDataBase;
 
 // ========================================================================
 // wxMask
@@ -123,6 +124,10 @@ public:
     void SetQuality(int q);
     void SetOk(bool isOk);
 
+    // raw bitmap access support functions
+    void *GetRawData(wxPixelDataBase& data, int bpp);
+    void UngetRawData(wxPixelDataBase& data);
+
     wxPalette* GetPalette() const;
     void SetPalette(const wxPalette& palette);
 

src/cocoa/bitmap.mm

@@ -19,6 +19,7 @@
 #include "wx/bitmap.h"
 #include "wx/image.h"
 #include "wx/xpmdecod.h"
+#include "wx/rawbmp.h"
 
 #include "wx/cocoa/autorelease.h"
 #include "wx/cocoa/string.h"
@@ -396,6 +397,37 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
     return true;
 }
 
+void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
+{
+    if(!Ok())
+        return NULL;
+
+    NSBitmapImageRep *bitmapRep = M_BITMAPDATA->m_cocoaNSBitmapImageRep;
+    if(!bitmapRep)
+        return NULL;
+
+    if([bitmapRep bitsPerPixel]!=bpp)
+    {
+        wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") );
+        return NULL;
+    }
+    data.m_width = [bitmapRep pixelsWide];
+    data.m_height = [bitmapRep pixelsHigh];
+    data.m_stride = [bitmapRep bytesPerRow];
+    return [bitmapRep bitmapData];
+
+    // NOTE: It is up to the user to make sure they used the proper
+    // pixel format class that details what is actually inside the pixels
+    // We can only check to make sure that the total number of bits per
+    // pixel are being iterated over properly
+    // NSBitmapImageRep can contain grayscale or CMYK data and
+    // wxPixelDataBase doesn't really define the color format
+}
+
+void wxBitmap::UngetRawData(wxPixelDataBase& data)
+{   // TODO
+}
+
 // ========================================================================
 // wxMask
 // ========================================================================