// From "Cocoa Drawing Guide: Working with Images"
NSImage *CreateNSImageFromCGImage( CGImageRef image )
{
NSRect imageRect = NSMakeRect(0.0, 0.0, 0.0, 0.0);
// Get the image dimensions.
imageRect.size.height = CGImageGetHeight(image);
imageRect.size.width = CGImageGetWidth(image);
// Create a new image to receive the Quartz image data.
NSImage *newImage = [[NSImage alloc] initWithSize:imageRect.size];
[newImage lockFocus];
// Get the Quartz context and draw.
CGContextRef imageContext = (CGContextRef) [[NSGraphicsContext currentContext] graphicsPort];
CGContextDrawImage( imageContext, *(CGRect*)&imageRect, image );
[newImage unlockFocus];
return( newImage );
}
// C-based style wrapper routines around NSCursor
CursorRef CreateCocoaCursor( CGImageRef cgImageRef, float hotSpotX, float hotSpotY )
{
static BOOL firstTime = YES;
if ( firstTime )
{
// Must first call [[[NSWindow alloc] init] release] to get the NSWindow machinery set up so that NSCursor can use a window to cache the cursor image
[[[NSWindow alloc] init] release];
firstTime = NO;
}
NSImage *nsImage = CreateNSImageFromCGImage( cgImageRef );
NSCursor *cursor = [[NSCursor alloc] initWithImage:nsImage hotSpot:NSMakePoint( hotSpotX, hotSpotY )];
[nsImage release];
return( (CursorRef)cursor );
}