X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a24aff654fb10971e82abccc1b56217d556d447b..404b319a85dadd7decf7a5a5331020520031a41c:/src/cocoa/bitmap.mm

diff --git a/src/cocoa/bitmap.mm b/src/cocoa/bitmap.mm
index ed803d8085..16ca2a7847 100644
--- a/src/cocoa/bitmap.mm
+++ b/src/cocoa/bitmap.mm
@@ -1,30 +1,66 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        bitmap.cpp
+// Name:        src/cocoa/bitmap.mm
 // Purpose:     wxBitmap
-// Author:      AUTHOR
+// Author:      David Elliott
 // Modified by:
-// Created:     ??/??/98
+// Created:     2003/07/19
 // RCS-ID:      $Id$
-// Copyright:   (c) AUTHOR
+// Copyright:   (c) 2003 David Elliott
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "bitmap.h"
-#endif
+#include "wx/wxprec.h"
 
-#include "wx/setup.h"
-#include "wx/utils.h"
-#include "wx/palette.h"
 #include "wx/bitmap.h"
-#include "wx/icon.h"
-#include "wx/log.h"
-#include "wx/image.h"
 
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
-IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
-#endif
+#ifndef WX_PRECOMP
+    #include "wx/log.h"
+    #include "wx/utils.h"
+    #include "wx/palette.h"
+    #include "wx/icon.h"
+    #include "wx/colour.h"
+    #include "wx/image.h"
+#endif //WX_PRECOMP
+
+#include "wx/xpmdecod.h"
+#include "wx/rawbmp.h"
+
+#include "wx/cocoa/autorelease.h"
+#include "wx/cocoa/string.h"
+#include "wx/cocoa/ObjcRef.h"
+
+#import <AppKit/NSBitmapImageRep.h>
+#import <AppKit/NSGraphics.h>
+#import <AppKit/NSImage.h>
+#import <AppKit/NSColor.h>
+
+IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler, wxBitmapHandlerBase)
+
+// ========================================================================
+// wxBitmapRefData
+// ========================================================================
+
+class wxBitmapRefData: public wxGDIRefData
+{
+    friend class wxBitmap;
+public:
+    wxBitmapRefData();
+    wxBitmapRefData( const wxBitmapRefData& data );
+    virtual ~wxBitmapRefData();
+
+    virtual bool IsOk() const { return m_ok; }
+
+protected:
+    int                 m_width;
+    int                 m_height;
+    int                 m_depth;
+    bool                m_ok;
+    int                 m_numColors;
+    wxPalette           m_bitmapPalette;
+    int                 m_quality;
+    WX_NSBitmapImageRep m_cocoaNSBitmapImageRep;
+    wxMask             *m_bitmapMask; // Optional mask
+};
 
 wxBitmapRefData::wxBitmapRefData()
 {
@@ -34,32 +70,49 @@ wxBitmapRefData::wxBitmapRefData()
     m_depth = 0;
     m_quality = 0;
     m_numColors = 0;
+    m_cocoaNSBitmapImageRep = nil;
     m_bitmapMask = NULL;
 }
 
+wxBitmapRefData::wxBitmapRefData( const wxBitmapRefData& data)
+{
+    wxAutoNSAutoreleasePool pool;
+
+    m_width = data.m_width;
+    m_height = data.m_height;
+    m_depth = data.m_depth;
+    m_ok = data.m_ok;
+    m_numColors = data.m_numColors;
+    m_bitmapPalette = data.m_bitmapPalette;
+    m_quality = data.m_quality;
+    m_cocoaNSBitmapImageRep = wxGCSafeRetain([[data.m_cocoaNSBitmapImageRep copyWithZone:nil] autorelease]);
+    m_bitmapMask = data.m_bitmapMask?new wxMask(*data.m_bitmapMask):NULL;
+}
+
 wxBitmapRefData::~wxBitmapRefData()
 {
-    /*
-     * TODO: delete the bitmap data here.
-     */
+    wxGCSafeRelease(m_cocoaNSBitmapImageRep);
+    m_cocoaNSBitmapImageRep = NULL;
 
-    if (m_bitmapMask)
-        delete m_bitmapMask;
+    delete m_bitmapMask;
     m_bitmapMask = NULL;
 }
 
+// ========================================================================
+// wxBitmap
+// ========================================================================
+
+#define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
+
+IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
+
 wxBitmap::wxBitmap()
 {
     m_refData = NULL;
-
-    if ( wxTheBitmapList )
-        wxTheBitmapList->AddBitmap(this);
 }
 
 wxBitmap::~wxBitmap()
 {
-    if (wxTheBitmapList)
-        wxTheBitmapList->DeleteObject(this);
 }
 
 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
@@ -72,111 +125,79 @@ wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits
     M_BITMAPDATA->m_numColors = 0;
 
     /* TODO: create the bitmap from data */
-
-    if ( wxTheBitmapList )
-        wxTheBitmapList->AddBitmap(this);
 }
 
-wxBitmap::wxBitmap(int w, int h, int d)
+wxBitmap::wxBitmap(NSImage* cocoaNSImage)
 {
-    (void)Create(w, h, d);
+    (void) Create(cocoaNSImage);
+}
 
-    if ( wxTheBitmapList )
-        wxTheBitmapList->AddBitmap(this);
+wxBitmap::wxBitmap(NSBitmapImageRep* cocoaNSBitmapImageRep)
+{
+    (void) Create(cocoaNSBitmapImageRep);
 }
 
-wxBitmap::wxBitmap(void *data, wxBitmapType type, int width, int height, int depth)
+wxBitmap::wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth)
 {
     (void) Create(data, type, width, height, depth);
-
-    if ( wxTheBitmapList )
-        wxTheBitmapList->AddBitmap(this);
 }
 
 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 {
     LoadFile(filename, type);
-
-    if ( wxTheBitmapList )
-        wxTheBitmapList->AddBitmap(this);
 }
 
-wxBitmap::wxBitmap(const wxImage& image, int depth)
+wxGDIRefData *wxBitmap::CreateGDIRefData() const
 {
+    return new wxBitmapRefData;
 }
 
-wxBitmap::wxBitmap(char **bits)
+wxGDIRefData *wxBitmap::CloneGDIRefData(const wxGDIRefData *data) const
 {
+    return new wxBitmapRefData(*(wxBitmapRefData*)data);
 }
 
-/* TODO: maybe allow creation from XPM
-// Create from data
-wxBitmap::wxBitmap(const char **data)
+WX_NSBitmapImageRep wxBitmap::GetNSBitmapImageRep()
 {
-    (void) Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0);
+    if(!M_BITMAPDATA)
+        return NULL;
+    return M_BITMAPDATA->m_cocoaNSBitmapImageRep;
 }
-*/
 
-bool wxBitmap::Create(int w, int h, int d)
+WX_NSImage wxBitmap::GetNSImage(bool useMask) const
 {
-    UnRef();
-
-    m_refData = new wxBitmapRefData;
-
-    M_BITMAPDATA->m_width = w;
-    M_BITMAPDATA->m_height = h;
-    M_BITMAPDATA->m_depth = d;
-
-    /* TODO: create new bitmap */
-
-    return M_BITMAPDATA->m_ok;
-}
-
-bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
-{
-    UnRef();
-
-    m_refData = new wxBitmapRefData;
-
-    wxBitmapHandler *handler = FindHandler(type);
-
-    if ( handler == NULL ) {
-        wxLogWarning("no bitmap handler for type %d defined.", type);
-
-        return FALSE;
-    }
-
-    return handler->LoadFile(this, filename, type, -1, -1);
-}
-
-bool wxBitmap::Create(void *data, wxBitmapType type, int width, int height, int depth)
-{
-    UnRef();
-
-    m_refData = new wxBitmapRefData;
-
-    wxBitmapHandler *handler = FindHandler(type);
-
-    if ( handler == NULL ) {
-        wxLogWarning("no bitmap handler for type %d defined.", type);
-
-        return FALSE;
+    if(!IsOk())
+        return nil;
+    NSImage *nsimage = [[[NSImage alloc]
+            initWithSize:NSMakeSize(GetWidth(), GetHeight())] autorelease];
+    if(!nsimage)
+        return nil;
+    [nsimage addRepresentation: M_BITMAPDATA->m_cocoaNSBitmapImageRep];
+    if(useMask && GetMask())
+    {
+        // Show before/after to prove that the bitmap itself is not changed
+        // even though we just composited onto the NSImage
+        wxLogTrace(wxTRACE_COCOA,wxT("Before: bpp=%d"),[M_BITMAPDATA->m_cocoaNSBitmapImageRep bitsPerPixel]);
+        NSImage *maskImage = [[NSImage alloc]
+                initWithSize:NSMakeSize(GetWidth(), GetHeight())];
+        [maskImage addRepresentation: GetMask()->GetNSBitmapImageRep()];
+        [nsimage lockFocus];
+        [maskImage compositeToPoint:NSZeroPoint operation:NSCompositeDestinationIn];
+        [nsimage unlockFocus];
+        [maskImage release];
+        wxLogTrace(wxTRACE_COCOA,wxT("After: bpp=%d"),[M_BITMAPDATA->m_cocoaNSBitmapImageRep bitsPerPixel]);
     }
-
-    return handler->Create(this, data, type, width, height, depth);
+    return nsimage;
 }
 
-bool wxBitmap::SaveFile(const wxString& filename, wxBitmapType type, const wxPalette *palette) const
+void wxBitmap::SetNSBitmapImageRep(WX_NSBitmapImageRep bitmapImageRep)
 {
-    wxBitmapHandler *handler = FindHandler(type);
-
-    if ( handler == NULL ) {
-        wxLogWarning("no bitmap handler for type %d defined.", type);
-
-        return FALSE;
-  }
-
-  return handler->SaveFile(this, filename, type, palette);
+    if(!M_BITMAPDATA)
+        return;
+    // NOTE: No checking is done to make sure width/height agree
+    wxGCSafeRetain(bitmapImageRep);
+    wxGCSafeRelease(M_BITMAPDATA->m_cocoaNSBitmapImageRep);
+    M_BITMAPDATA->m_cocoaNSBitmapImageRep = bitmapImageRep;
 }
 
 void wxBitmap::SetWidth(int w)
@@ -235,185 +256,470 @@ void wxBitmap::SetMask(wxMask *mask)
     M_BITMAPDATA->m_bitmapMask = mask ;
 }
 
-/*
- * wxMask
- */
+wxPalette* wxBitmap::GetPalette() const
+{
+    if(!m_refData)
+        return NULL;
+    return &M_BITMAPDATA->m_bitmapPalette;
+}
 
-wxMask::wxMask()
+wxMask* wxBitmap::GetMask() const
 {
-/* TODO
-    m_maskBitmap = 0;
-*/
+    if(!m_refData)
+        return NULL;
+    return M_BITMAPDATA->m_bitmapMask;
 }
 
-// Construct a mask from a bitmap and a colour indicating
-// the transparent area
-wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
+int wxBitmap::GetDepth() const
 {
-/* TODO
-    m_maskBitmap = 0;
-*/
-    Create(bitmap, colour);
+    if(!m_refData)
+        return 0;
+    return M_BITMAPDATA->m_depth;
 }
 
-// Construct a mask from a bitmap and a palette index indicating
-// the transparent area
-wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
+int wxBitmap::GetWidth() const
 {
-/* TODO
-    m_maskBitmap = 0;
-*/
+    if(!m_refData)
+        return 0;
+    return M_BITMAPDATA->m_width;
+}
 
-    Create(bitmap, paletteIndex);
+int wxBitmap::GetHeight() const
+{
+    if(!m_refData)
+        return 0;
+    return M_BITMAPDATA->m_height;
 }
 
-// Construct a mask from a mono bitmap (copies the bitmap).
-wxMask::wxMask(const wxBitmap& bitmap)
+bool wxBitmap::Create(int w, int h, int d)
 {
-/* TODO
-    m_maskBitmap = 0;
-*/
+    wxAutoNSAutoreleasePool pool;
 
-    Create(bitmap);
+    UnRef();
+
+    m_refData = new wxBitmapRefData;
+
+    M_BITMAPDATA->m_width = w;
+    M_BITMAPDATA->m_height = h;
+    M_BITMAPDATA->m_depth = d;
+
+    /* TODO: create new bitmap */
+    M_BITMAPDATA->m_cocoaNSBitmapImageRep = wxGCSafeRetain([[[NSBitmapImageRep alloc]
+            initWithBitmapDataPlanes: NULL
+            pixelsWide: w
+            pixelsHigh: h
+            bitsPerSample: 8
+            samplesPerPixel: 3
+            hasAlpha: NO
+            isPlanar: NO
+            colorSpaceName: NSCalibratedRGBColorSpace
+            bytesPerRow: 0  // NOTE: Contrary to Apple documentation Mac OS
+                            // 10.4 will add padding bytes when 0 is used here
+            bitsPerPixel: 0] autorelease]);
+
+    wxLogTrace(wxTRACE_COCOA,wxT("M_BITMAPDATA=%p NSBitmapImageRep bitmapData=%p"), M_BITMAPDATA, [M_BITMAPDATA->m_cocoaNSBitmapImageRep bitmapData]);
+    M_BITMAPDATA->m_ok = true;
+    M_BITMAPDATA->m_numColors = 0;
+    M_BITMAPDATA->m_quality = 0;
+    M_BITMAPDATA->m_bitmapMask = NULL;
+
+    return M_BITMAPDATA->m_ok;
 }
 
-wxMask::~wxMask()
+bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
 {
-// TODO: delete mask bitmap
+    wxAutoNSAutoreleasePool pool;
+    UnRef();
+
+    m_refData = new wxBitmapRefData;
+
+    NSBitmapImageRep *imageRep = [NSBitmapImageRep
+        imageRepWithContentsOfFile:wxNSStringWithWxString(filename)];
+
+    if(imageRep)
+    {
+        M_BITMAPDATA->m_width = [imageRep pixelsWide];
+        M_BITMAPDATA->m_height = [imageRep pixelsHigh];
+        M_BITMAPDATA->m_depth = 24; // FIXME
+        M_BITMAPDATA->m_ok = true;
+        M_BITMAPDATA->m_numColors = 0;
+        M_BITMAPDATA->m_quality = 0;
+        M_BITMAPDATA->m_cocoaNSBitmapImageRep = wxGCSafeRetain(imageRep);
+        M_BITMAPDATA->m_bitmapMask = NULL;
+        return true;
+    }
+    wxImage image;
+    if(!image.LoadFile(filename,type))
+        return false;
+    if(!image.IsOk())
+        return false;
+    *this = wxBitmap(image);
+    return true;
 }
 
-// Create a mask from a mono bitmap (copies the bitmap).
-bool wxMask::Create(const wxBitmap& bitmap)
+bool wxBitmap::Create(NSImage* cocoaNSImage)
 {
-// TODO
-    return FALSE;
+    wxAutoNSAutoreleasePool pool;
+    NSBitmapImageRep *bitmapImageRep = [NSBitmapImageRep imageRepWithData:[cocoaNSImage TIFFRepresentation]];
+    return Create(bitmapImageRep);
 }
 
-// Create a mask from a bitmap and a palette index indicating
-// the transparent area
-bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
+bool wxBitmap::Create(NSBitmapImageRep *imageRep)
 {
-// TODO
-    return FALSE;
+    UnRef();
+    m_refData = new wxBitmapRefData;
+    if(imageRep != nil)
+    {
+        M_BITMAPDATA->m_width = [imageRep pixelsWide];
+        M_BITMAPDATA->m_height = [imageRep pixelsHigh];
+        M_BITMAPDATA->m_depth = [imageRep bitsPerPixel];
+        M_BITMAPDATA->m_ok = true;
+        M_BITMAPDATA->m_numColors = 0;
+        M_BITMAPDATA->m_quality = 0;
+        M_BITMAPDATA->m_cocoaNSBitmapImageRep = wxGCSafeRetain(imageRep);
+        M_BITMAPDATA->m_bitmapMask = NULL;
+        return true;
+    }
+    else
+        return false;
 }
 
-// Create a mask from a bitmap and a colour indicating
-// the transparent area
-bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
+bool wxBitmap::Create(const void* data, wxBitmapType type, int width, int height, int depth)
 {
-// TODO
-    return FALSE;
-}
+    UnRef();
 
-/*
- * wxBitmapHandler
- */
+    m_refData = new wxBitmapRefData;
 
-IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
+    return false;
+}
 
-wxBitmapHandler::~wxBitmapHandler()
+bool wxBitmap::SaveFile(const wxString& filename, wxBitmapType type, const wxPalette *palette) const
 {
+    return false;
 }
 
-bool wxBitmapHandler::Create(wxBitmap *bitmap, void *data, long type, int width, int height, int depth)
+bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 {
-    return FALSE;
+    // Pool here due to lack of one during wx init phase
+    wxAutoNSAutoreleasePool pool;
+
+    UnRef();
+    if(!icon.GetNSImage());
+    [icon.GetNSImage() lockFocus];
+    NSRect imageRect;
+    imageRect.origin.x = imageRect.origin.y = 0.0;
+    imageRect.size = [icon.GetNSImage() size];
+    NSBitmapImageRep *newBitmapRep = [[[NSBitmapImageRep alloc] initWithFocusedViewRect:imageRect] autorelease];
+    [icon.GetNSImage() unlockFocus];
+    if(!newBitmapRep)
+        return false;
+    m_refData = new wxBitmapRefData;
+    M_BITMAPDATA->m_cocoaNSBitmapImageRep = wxGCSafeRetain(newBitmapRep);
+    M_BITMAPDATA->m_width = [newBitmapRep pixelsWide];
+    M_BITMAPDATA->m_height = [newBitmapRep pixelsHigh];
+    M_BITMAPDATA->m_depth = [newBitmapRep bitsPerSample]*[newBitmapRep samplesPerPixel];
+    M_BITMAPDATA->m_ok = true;
+    M_BITMAPDATA->m_numColors = 0;
+    M_BITMAPDATA->m_quality = 0;
+    M_BITMAPDATA->m_bitmapMask = NULL;
+    return true;
 }
 
-bool wxBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long type,
-        int desiredWidth, int desiredHeight)
+wxBitmap wxBitmap::GetSubBitmap(const wxRect& rect) const
 {
-    return FALSE;
+    wxAutoNSAutoreleasePool pool;
+    if(!IsOk())
+        return wxNullBitmap;
+    NSImage *nsimage = GetNSImage(false);
+
+    [nsimage lockFocus];
+    NSRect imageRect = {{0,0}, [nsimage size]};
+    imageRect.origin.x = imageRect.size.width * rect.x / GetWidth();
+    imageRect.origin.y = imageRect.size.height * rect.y / GetHeight();
+    imageRect.size.width *= static_cast<CGFloat>(rect.width) / GetWidth();
+    imageRect.size.height *= static_cast<CGFloat>(rect.height) / GetHeight();
+
+    NSBitmapImageRep *newBitmapRep = [[NSBitmapImageRep alloc] initWithFocusedViewRect:imageRect];
+    [nsimage unlockFocus];
+
+    wxBitmap newBitmap(newBitmapRep);
+
+    return (newBitmap);
 }
 
-bool wxBitmapHandler::SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette)
+wxImage wxBitmap::ConvertToImage() const
 {
-    return FALSE;
+    wxAutoNSAutoreleasePool pool;
+    if(!IsOk())
+        return /*wxImage(5,5)*/wxNullImage;
+    NSImage *nsimage = GetNSImage(false /* don't use mask */);
+    wxImage newImage(M_BITMAPDATA->m_width,M_BITMAPDATA->m_height);
+    [nsimage lockFocus];
+    for(int i=0; i < M_BITMAPDATA->m_width; i++)
+    {
+        // Don't let the pool get too big as you'll notice we're creating
+        // two autoreleased NSColor objects with every iteration.
+        wxAutoNSAutoreleasePool loopPool;
+        for(int j=0; j < M_BITMAPDATA->m_height; j++)
+        {
+            NSColor *pixelColor = NSReadPixel(NSMakePoint(i,M_BITMAPDATA->m_height - j - 1));
+            NSColor *color = [pixelColor colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
+            newImage.SetRGB(i,j,int([color redComponent]*255.0), int([color greenComponent]*255.0), int([color blueComponent]*255.0));
+        }
+    }
+    [nsimage unlockFocus];
+    return newImage;
 }
 
-/*
- * Standard handlers
- */
+bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
+{
+    wxAutoNSAutoreleasePool pool;
+    UnRef();
+
+    wxCHECK_MSG(image.IsOk(), false, wxT("invalid image"));
+    wxCHECK_MSG(depth == -1 || depth == 1, false, wxT("invalid bitmap depth"));
+
+    m_refData = new wxBitmapRefData();
+
+    M_BITMAPDATA->m_width = image.GetWidth();
+    M_BITMAPDATA->m_height = image.GetHeight();
+    NSBitmapImageRep *bitmapImage = [[[NSBitmapImageRep alloc]
+            initWithBitmapDataPlanes: NULL
+            pixelsWide: image.GetWidth()
+            pixelsHigh: image.GetHeight()
+            bitsPerSample: 8
+            samplesPerPixel: 3
+            hasAlpha: NO
+            isPlanar: NO
+            colorSpaceName: NSCalibratedRGBColorSpace
+            bytesPerRow: image.GetWidth()*3
+            bitsPerPixel: 0] autorelease];
+
+    // TODO: Specify bytesPerRow:0 and then use [bitmapImage bytesPerRow]
+    // so that the rows are aligned suitably for altivec by the OS (Tiger)
+    const int numBytes = image.GetWidth()*image.GetHeight()*3;
+    memcpy([bitmapImage bitmapData], image.GetData(), numBytes);
+    // TODO: Alpha and convert to desired depth
+    M_BITMAPDATA->m_depth = 24;
+    M_BITMAPDATA->m_ok = true;
+    M_BITMAPDATA->m_numColors = 0;
+    M_BITMAPDATA->m_quality = 0;
+    M_BITMAPDATA->m_cocoaNSBitmapImageRep = wxGCSafeRetain(bitmapImage);
+    M_BITMAPDATA->m_bitmapMask = new wxMask(*this,wxColour(image.GetMaskRed(),image.GetMaskGreen(),image.GetMaskBlue()));
+    return true;
+}
 
-/* TODO: bitmap handlers, a bit like this:
-class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler
+void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 {
-    DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler)
-public:
-    inline wxBMPResourceHandler()
+    if(!IsOk())
+        return NULL;
+
+    NSBitmapImageRep *bitmapRep = M_BITMAPDATA->m_cocoaNSBitmapImageRep;
+    if(!bitmapRep)
+        return NULL;
+
+    if([bitmapRep bitsPerPixel]!=bpp)
     {
-        m_name = "Windows bitmap resource";
-        m_extension = "";
-        m_type = wxBITMAP_TYPE_BMP_RESOURCE;
-    };
+        wxFAIL_MSG( wxT("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];
 
-    virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
-          int desiredWidth, int desiredHeight);
-};
-IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler)
-*/
+    // 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::InitStandardHandlers()
-{
-/* TODO: initialize all standard bitmap or derive class handlers here.
-    AddHandler(new wxBMPResourceHandler);
-    AddHandler(new wxBMPFileHandler);
-    AddHandler(new wxXPMFileHandler);
-    AddHandler(new wxXPMDataHandler);
-    AddHandler(new wxICOResourceHandler);
-    AddHandler(new wxICOFileHandler);
-*/
+void wxBitmap::UngetRawData(wxPixelDataBase& data)
+{   // TODO
 }
 
-bool wxBitmap::CopyFromIcon(const wxIcon& icno)
+// ========================================================================
+// wxMask
+// ========================================================================
+
+IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
+
+wxMask::wxMask()
 {
-    return false;
+    m_cocoaNSBitmapImageRep = nil;
 }
 
-wxPalette* wxBitmap::GetPalette() const
+// Construct a mask from a bitmap and a colour indicating
+// the transparent area
+wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
 {
-    return NULL;
+    m_cocoaNSBitmapImageRep = nil;
+    Create(bitmap, colour);
 }
 
-wxBitmap wxBitmap::GetSubBitmap(wxRect const&) const
+// Construct a mask from a bitmap and a palette index indicating
+// the transparent area
+wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
 {
-    return wxNullBitmap;
+    m_cocoaNSBitmapImageRep = nil;
+
+    Create(bitmap, paletteIndex);
 }
 
-wxImage wxBitmap::ConvertToImage() const
+// Construct a mask from a mono bitmap (copies the bitmap).
+wxMask::wxMask(const wxBitmap& bitmap)
 {
-    return wxNullImage;
+    m_cocoaNSBitmapImageRep = nil;
+
+    Create(bitmap);
 }
 
-bool wxBitmap::Ok() const
+// Copy constructor
+wxMask::wxMask(const wxMask& src)
+:   wxObject(src)
+,   m_cocoaNSBitmapImageRep(wxGCSafeRetain(src.m_cocoaNSBitmapImageRep))
 {
-    return FALSE;
 }
 
-wxMask* wxBitmap::GetMask() const
+wxMask::~wxMask()
 {
-    return NULL;
+    wxGCSafeRelease(m_cocoaNSBitmapImageRep);
 }
 
-int wxBitmap::GetDepth() const
+// Create a mask from a mono bitmap (copies the bitmap).
+bool wxMask::Create(const wxBitmap& bitmap)
 {
-    return 0;
+// TODO
+    wxLogDebug(wxT("Cannot yet create a mask from a mono bitmap"));
+    return FALSE;
 }
 
-int wxBitmap::GetWidth() const
+// Create a mask from a bitmap and a palette index indicating
+// the transparent area
+bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
 {
-    return 0;
+// TODO
+    wxLogDebug(wxT("Cannot yet create a mask from a palette bitmap"));
+    return FALSE;
 }
 
-int wxBitmap::GetHeight() const
+template <typename PixelData>
+static bool wxMask_CreateFromBitmapData(PixelData srcData, const wxColour& colour, unsigned char *dstData)
 {
-    return 0;
+    wxCHECK_MSG(dstData,false,wxT("Couldn't access mask data"));
+    typename PixelData::Iterator p(srcData);
+    const int nRows = srcData.GetHeight();
+    const int nCols = srcData.GetWidth();
+    // Total number of bytes per destination column
+    const int dstRowLength = (nCols+7)/8;
+    // Number of source columns that fit into a byte in the destination
+    const int width_aligned = nCols/8*8;
+    for(int y=0; y<nRows; ++y)
+    {
+        typename PixelData::Iterator rowStart(p);
+        unsigned char *dstRow = dstData + y*dstRowLength;
+        for(int x=0; x<width_aligned; x+=8)
+        {
+            unsigned char *dstByte = dstRow + x/8;
+            *dstByte = 0;
+            // Take source RGB, compare it with the wxColour
+            for(int j=0; j<8; ++j, ++p)
+            {
+                *dstByte +=
+                (   p.Red()!=colour.Red()
+                ||  p.Green()!=colour.Green()
+                ||  p.Blue()!=colour.Blue()
+                )   << (7-j);
+            }
+        }
+        // Handle the remaining 0-7 pixels in the row
+        unsigned char *dstByte = dstRow + width_aligned/8;
+        if(nCols%8>0)
+            *dstByte = 0;
+        for(int j=0; j<(nCols%8); ++j, ++p)
+        {
+            *dstByte +=
+            (   p.Red()!=colour.Red()
+            ||  p.Green()!=colour.Green()
+            ||  p.Blue()!=colour.Blue()
+            )   << (7-j);
+        }
+        p = rowStart;
+        p.OffsetY(srcData,1);
+    }
+    return true;
 }
 
-
-bool wxBitmap::CreateFromXpm(const char **)
+// Create a mask from a bitmap and a colour indicating
+// the transparent area
+bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
 {
-    return false;
-}
+    wxAutoNSAutoreleasePool pool;
+    if(!bitmap.IsOk())
+        return false;
+    int bmpWidth = bitmap.GetWidth();
+    int bmpHeight = bitmap.GetHeight();
+    int dstRowLength = (bmpWidth+7)/8;
+
+    // Create a bitmap image rep with 1-bit per pixel data representing
+    // the alpha channel padded such that rows end on byte boundaries
+    // Since NSBitmapImageRep doesn't have any sort of NSNullColorSpace
+    // we must have at least one channel of non-alpha data.  In order to
+    // make our life easy, we use planar data which results in two
+    // separate arrays.  We don't need to touch the first because it
+    // should never be used.  The second is the 1-bit "alpha" data.
+    NSBitmapImageRep *maskRep = [[[NSBitmapImageRep alloc]
+        initWithBitmapDataPlanes:NULL pixelsWide:bmpWidth
+        pixelsHigh:bmpHeight bitsPerSample:1
+        samplesPerPixel:2 hasAlpha:YES isPlanar:YES
+        colorSpaceName:NSCalibratedWhiteColorSpace
+        bytesPerRow:dstRowLength bitsPerPixel:1] autorelease];
+    wxCHECK(maskRep,false);
+
+    // We need the source NSBitmapImageRep to detemine its pixel format
+    NSBitmapImageRep *srcBitmapRep = const_cast<wxBitmap&>(bitmap).GetNSBitmapImageRep();
+    wxCHECK_MSG(srcBitmapRep,false,wxT("Can't create mask for an uninitialized bitmap"));
+
+    // Get a pointer to the destination data
+    unsigned char *dstPlanes[5] = {NULL,NULL,NULL,NULL,NULL};
+    [maskRep getBitmapDataPlanes:dstPlanes];
+    unsigned char *dstData = dstPlanes[1];
+    // The wxImage format (which we use whenever we imported from wxImage)
+    if([srcBitmapRep bitsPerPixel]==24 && [srcBitmapRep bitsPerSample]==8 && [srcBitmapRep samplesPerPixel]==3 && [srcBitmapRep hasAlpha]==NO)
+    {
+        wxPixelData<wxBitmap,wxNativePixelFormat> pixelData(const_cast<wxBitmap&>(bitmap));
+        wxCHECK_MSG(wxMask_CreateFromBitmapData(pixelData, colour, dstData),
+            false, wxT("Unable to access raw data"));
+    }
+    // 32-bpp RGBx (x=throw away, no alpha)
+    else if([srcBitmapRep bitsPerPixel]==32 && [srcBitmapRep bitsPerSample]==8 && [srcBitmapRep samplesPerPixel]==3 && [srcBitmapRep hasAlpha]==NO)
+    {
+        typedef wxPixelFormat<unsigned char,32,0,1,2> PixelFormat;
+        wxPixelData<wxBitmap,PixelFormat> pixelData(const_cast<wxBitmap&>(bitmap));
+        wxCHECK_MSG(wxMask_CreateFromBitmapData(pixelData, colour, dstData),
+            false, wxT("Unable to access raw data"));
+    }
+    // 32-bpp RGBA
+    else if([srcBitmapRep bitsPerPixel]==32 && [srcBitmapRep bitsPerSample]==8 && [srcBitmapRep samplesPerPixel]==4 && [srcBitmapRep hasAlpha]==YES)
+    {
+        wxPixelData<wxBitmap,wxAlphaPixelFormat> pixelData(const_cast<wxBitmap&>(bitmap));
+        wxCHECK_MSG(wxMask_CreateFromBitmapData(pixelData, colour, dstData),
+            false, wxT("Unable to access raw data"));
+    }
+    else if([srcBitmapRep bitsPerPixel]==8 && [srcBitmapRep bitsPerSample]==8 && [srcBitmapRep samplesPerPixel]==1 && [srcBitmapRep hasAlpha]==NO)
+    // 8-bpp Grayscale, no alpha
+    {   // Force all RGB to access the same grayscale component
+        typedef wxPixelFormat<unsigned char,8,0,0,0> PixelFormat;
+        wxPixelData<wxBitmap,PixelFormat> pixelData(const_cast<wxBitmap&>(bitmap));
+        wxCHECK_MSG(wxMask_CreateFromBitmapData(pixelData, colour, dstData),
+            false, wxT("Unable to access raw data"));
+    }
+    else
+    {   wxCHECK_MSG(false,false,wxT("Unimplemented pixel format")); }
 
-// vim:sts=4:sw=4:syn=cpp:et
+    // maskRep was autoreleased in case we had to exit quickly
+    m_cocoaNSBitmapImageRep = wxGCSafeRetain(maskRep);
+    return true;
+}