some != NULL checks

[wxWidgets.git] / src / mac / bitmap.cpp

diff --git a/src/mac/bitmap.cpp b/src/mac/bitmap.cpp
index d14b15ba7f3c7d936210fe0ef8e8339b1284cce5..1ae5a445d4b8fc5c16285428023761b29a351955 100644 (file)
--- a/src/mac/bitmap.cpp
+++ b/src/mac/bitmap.cpp
@@ -446,18 +446,14 @@ wxBitmapHandler *wxBitmap::FindHandler(long bitmapType)
 
 wxMask::wxMask()
 {
-/* TODO
     m_maskBitmap = 0;
-*/
 }
 
 // Construct a mask from a bitmap and a colour indicating
 // the transparent area
 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
 {
-/* TODO
     m_maskBitmap = 0;
-*/
     Create(bitmap, colour);
 }
 
@@ -465,26 +461,24 @@ wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
 // the transparent area
 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
 {
-/* TODO
     m_maskBitmap = 0;
-*/
-
     Create(bitmap, paletteIndex);
 }
 
 // Construct a mask from a mono bitmap (copies the bitmap).
 wxMask::wxMask(const wxBitmap& bitmap)
 {
-/* TODO
     m_maskBitmap = 0;
-*/
-
     Create(bitmap);
 }
 
 wxMask::~wxMask()
 {
-// TODO: delete mask bitmap
+       if ( m_maskBitmap )
+       {
+               wxMacDestroyGWorld( m_maskBitmap ) ;
+               m_maskBitmap = NULL ;
+       }
 }
 
 // Create a mask from a mono bitmap (copies the bitmap).
@@ -506,8 +500,54 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
 // the transparent area
 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
 {
-// TODO
-    return FALSE;
+       if ( m_maskBitmap )
+       {
+               wxMacDestroyGWorld( m_maskBitmap ) ;
+               m_maskBitmap = NULL ;
+       }
+       wxASSERT( ((wxBitmapRefData*) bitmap.GetRefData())->m_bitmapType == kMacBitmapTypeGrafWorld ) ;
+       // other types would require a temporary bitmap. not yet implemented 
+       
+    if (!bitmap.Ok())
+    {
+        return FALSE;
+    }
+
+       m_maskBitmap = wxMacCreateGWorld( bitmap.GetWidth() , bitmap.GetHeight() , 1 ) ;        
+       RGBColor maskColor = colour.GetPixel() ;
+
+    // this is not very efficient, but I can't think
+    // of a better way of doing it
+       CGrafPtr        origPort ;
+       GDHandle        origDevice ;
+                       
+       GetGWorld( &origPort , &origDevice ) ;
+       for (int w = 0; w < bitmap.GetWidth(); w++)
+    {
+        for (int h = 0; h < bitmap.GetHeight(); h++)
+        {              
+                       RGBColor colors[2] = { 
+                               { 0xFFFF , 0xFFFF , 0xFFFF } ,
+                               { 0, 0 , 0 } 
+                               } ;
+                               
+                       SetGWorld( ((wxBitmapRefData*) bitmap.GetRefData())->m_hBitmap , NULL ) ;
+                       RGBColor col ;
+                       GetCPixel( w , h , &col ) ;
+                       SetGWorld( m_maskBitmap , NULL ) ;
+            if (col.red == maskColor.red && col.blue == maskColor.blue && col.green == maskColor.green)
+            {
+                               SetCPixel( w , h , &colors[0] ) ;
+            }
+            else
+            {
+                               SetCPixel( w , h , &colors[1] ) ;
+            }
+        }
+    }
+       SetGWorld( origPort , origDevice ) ;
+
+    return TRUE;
 }
 
 /*