/////////////////////////////////////////////////////////////////////////////
// Name: src/cocoa/dcmemory.mm
-// Purpose: wxMemoryDC class
+// Purpose: wxMemoryDCImpl class
// Author: David Elliott
// Modified by:
// Created: 2003/03/16
// RCS-ID: $Id$
// Copyright: (c) 2002 David Elliott
-// Licence: wxWidgets licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#include "wx/wxprec.h"
#ifndef WX_PRECOMP
#include "wx/log.h"
- #include "wx/dcmemory.h"
#endif //WX_PRECOMP
+#include "wx/cocoa/dcmemory.h"
#include "wx/cocoa/autorelease.h"
#import <AppKit/NSImage.h>
#import <AppKit/NSBezierPath.h>
//-----------------------------------------------------------------------------
-// wxMemoryDC
+// wxMemoryDCImpl
//-----------------------------------------------------------------------------
-IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxDC)
+IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl,wxCocoaDCImpl)
-wxMemoryDC::wxMemoryDC( const wxBitmap& bitmap )
+void wxMemoryDCImpl::Init()
{
m_cocoaNSImage = NULL;
m_ok = false;
-
- if ( bitmap.IsOk() )
- SelectObject(bitmap);
}
-wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
+wxMemoryDCImpl::wxMemoryDCImpl(wxMemoryDC *owner, wxDC *WXUNUSED(dc))
+: wxCocoaDCImpl(owner)
{
- m_cocoaNSImage = NULL;
- m_ok = false;
+ Init();
}
-wxMemoryDC::~wxMemoryDC(void)
+wxMemoryDCImpl::~wxMemoryDCImpl(void)
{
CocoaUnwindStackAndLoseFocus();
[m_cocoaNSImage release];
}
-bool wxMemoryDC::CocoaLockFocus()
+bool wxMemoryDCImpl::CocoaLockFocus()
{
if(m_cocoaNSImage)
{
return false;
}
-bool wxMemoryDC::CocoaUnlockFocus()
+bool wxMemoryDCImpl::CocoaUnlockFocus()
{
[m_cocoaNSImage unlockFocus];
return true;
// NOTE: The AppKit is unable to draw onto an NSBitmapImageRep so we must
// instead copy the data to an offscreen window, then copy it back
-void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
+void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
{
wxAutoNSAutoreleasePool pool;
- if(m_selectedBitmap.Ok())
+ if(m_selectedBitmap.IsOk())
{
CocoaTakeFocus();
wxASSERT(m_cocoaNSImage);
+ // Replace the bitmap's native data with a newly created one based on the
+ // NSImage that has been (potentially) drawn upon. Note that this may and
+ // probably will in many cases change the bitmap's format.
+ // There is nothing we can do about this using pure Cocoa code. Even using
+ // CGBitmapContext is not an option because it only supports a limited
+ // number of bitmap formats. Specifically, 24-bpp is not supported.
m_selectedBitmap.SetNSBitmapImageRep(
[[NSBitmapImageRep alloc]
initWithFocusedViewRect:NSMakeRect(0.0,0.0,
[m_cocoaNSImage release];
m_cocoaNSImage = nil;
m_selectedBitmap = bitmap;
- if(m_selectedBitmap.Ok())
+ if(m_selectedBitmap.IsOk())
{
// Create an offscreen window of the same size
m_cocoaNSImage = [[NSImage alloc]
m_selectedBitmap.GetHeight())];
// Now copy the data
+ // Pass false to GetNSImage so the mask is not applied as an alpha channel.
+ // Cocoa uses premultiplied alpha so applying the mask would cause all
+ // color information masked out to be turned black which is undesirable.
+ // FIXME: Currently, the mask will not be updated if any drawing occurs.
+ // My only suggestion is for wxCocoa users to eschew the mask in favor
+ // of an alpha channel or to recreate the mask after drawing.
+ // The only way to fix this is to draw twice, once as normal and again
+ // onto the mask to update it. That would require overriding every
+ // single drawing primitive (e.g. DoDrawLine, DoDrawRectangle, etc.)
+ // and would be a major undertaking.
NSImage *nsimage = [m_selectedBitmap.GetNSImage(false) retain];
[m_cocoaNSImage lockFocus];
[nsimage drawAtPoint: NSMakePoint(0,0)
}
}
-void wxMemoryDC::DoGetSize( int *width, int *height ) const
+void wxMemoryDCImpl::DoGetSize( int *width, int *height ) const
{
if(width)
*width = m_selectedBitmap.GetWidth();
*height = m_selectedBitmap.GetHeight();
}
-bool wxMemoryDC::CocoaDoBlitOnFocusedDC(wxCoord xdest, wxCoord ydest,
+bool wxMemoryDCImpl::CocoaDoBlitOnFocusedDC(wxCoord xdest, wxCoord ydest,
wxCoord width, wxCoord height, wxCoord xsrc, wxCoord ysrc,
int logicalFunc, bool useMask, wxCoord xsrcMask, wxCoord ysrcMask)
{
- if(!m_selectedBitmap.Ok())
+ if(!m_selectedBitmap.IsOk())
return false;
NSAffineTransform *transform = [NSAffineTransform transform];
[transform concat];
[flipTransform concat];
+ NSImage *sourceImage;
+ if(useMask)
+ {
+ sourceImage = [m_cocoaNSImage copy];
+ // Apply the mask to the copied image
+ NSBitmapImageRep *maskRep = m_selectedBitmap.GetMask()->GetNSBitmapImageRep();
+ NSImage *maskImage = [[NSImage alloc] initWithSize:[maskRep size]];
+ [maskImage addRepresentation:maskRep];
+ [sourceImage lockFocus];
+ [maskImage compositeToPoint:NSZeroPoint operation:NSCompositeDestinationIn];
+ [sourceImage unlockFocus];
+ [maskImage release];
+ }
+ else
+ { // retain the m_cocoaNSImage so it has the same ownership as the copy done in the other case.
+ sourceImage = [m_cocoaNSImage retain];
+ }
+ NSCompositingOperation drawingOp;
+ switch(logicalFunc)
+ {
+ case wxCOPY:
+ // Even if not using the mask, the image might have an alpha channel
+ // so always use NSCompositeSourceOver. If the image is fully opaque
+ // it works out the same as NSCompositeCopy.
+ drawingOp = NSCompositeSourceOver;
+ break;
+ // FIXME: implement more raster ops
+ default:
+ wxLogDebug(wxT("wxCocoa does not support blitting with raster operation %d."), logicalFunc);
+ // Just use the default operation.
+ drawingOp = NSCompositeCopy;
+ }
+
wxLogTrace(wxTRACE_COCOA,wxT("[m_cocoaNSImage isFlipped]=%d"), [m_cocoaNSImage isFlipped]);
- [m_cocoaNSImage drawAtPoint: NSMakePoint(0,0)
+ [sourceImage drawAtPoint: NSMakePoint(0,0)
fromRect: NSMakeRect(xsrc,
m_selectedBitmap.GetHeight()-height-ysrc,
width, height)
- operation: NSCompositeCopy // FIXME: raster ops
+ operation: drawingOp
fraction: 1.0];
+ [sourceImage release]; // It was either retained, copied, or allocated.
[context restoreGraphicsState];
return false;
}
-bool wxMemoryDC::CocoaGetBounds(void *rectData)
+bool wxMemoryDCImpl::CocoaGetBounds(void *rectData)
{
if(!rectData)
return false;
projects / wxWidgets.git / blobdiff