//-----------------------------------------------------------------------------
CGContextRef CGBitmap::createCGContext ()
{
CGContextRef context = 0;
if (bits == 0)
{
allocBits ();
if (imageSource)
getCGImage ();
if (image)
{
context = createCGContext ();
if (context)
{
CGContextScaleCTM (context, 1, -1);
CGContextDrawImage (context, CGRectMake (0, -size.y, size.x, size.y), image);
CGContextScaleCTM (context, 1, -1);
return context;
}
}
}
if (bits)
{
CGBitmapInfo bitmapInfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Big;
context = CGBitmapContextCreate (bits,
size.x,
size.y,
8,
getBytesPerRow (),
GetCGColorSpace (),
bitmapInfo);
CGContextTranslateCTM (context, 0, (CGFloat)size.y);
CGContextScaleCTM (context, 1, -1);
}
return context;
}
//-----------------------------------------------------------------------------
CGLayerRef CGBitmap::createCGLayer (CGContextRef context)
{
if (layer && !dirty)
return layer;
CGImageRef image = getCGImage ();
layer = image ? CGLayerCreateWithContext (context, CGSizeMake (size.x, size.y), 0) : 0;
if (layer)
{
CGContextRef layerContext = CGLayerGetContext (layer);
CGContextDrawImage (layerContext, CGRectMake (0, 0, size.x, size.y), image);
}
return layer;
}
//-----------------------------------------------------------------------------
CGLayerRef CGBitmap::createCGLayer (CGContextRef context)
{
if (layer && !dirty)
return layer;
CGImageRef image = getCGImage ();
layer = image ? CGLayerCreateWithContext (context, CGSizeFromCPoint (size), 0) : 0;
if (layer)
{
CGContextRef layerContext = CGLayerGetContext (layer);
CGContextDrawImage (layerContext, CGRectMake (0, 0, static_cast<CGFloat> (size.x), static_cast<CGFloat> (size.y)), image);
}
return layer;
}
