//-----------------------------------------------------------------------------
void CGDrawContext::init ()
{
CGContextSaveGState (cgContext);
CGContextSetShouldAntialias (cgContext, false);
CGContextSetFillColorSpace (cgContext, GetCGColorSpace ());
CGContextSetStrokeColorSpace (cgContext, GetCGColorSpace ());
CGContextSaveGState (cgContext);
CGAffineTransform cgCTM = CGAffineTransformMake (1.0, 0.0, 0.0, -1.0, 0.0, 0.0);
CGContextSetTextMatrix (cgContext, cgCTM);
CDrawContext::init ();
}
//-----------------------------------------------------------------------------
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;
}
//-----------------------------------------------------------------------------
CGImageRef CGBitmap::getCGImage ()
{
if (image == 0 && imageSource)
{
const void* keys[] = {kCGImageSourceShouldCache, kCGImageSourceShouldPreferRGB32};
const void* values[] = {kCFBooleanTrue, kCFBooleanTrue};
CFDictionaryRef options = CFDictionaryCreate (NULL, keys, values, 2, NULL, NULL);
image = CGImageSourceCreateImageAtIndex (imageSource, 0, options);
CFRelease (imageSource);
CFRelease (options);
imageSource = 0;
}
if ((dirty || image == 0) && bits)
{
freeCGImage ();
size_t rowBytes = getBytesPerRow ();
size_t byteCount = rowBytes * size.y;
size_t bitDepth = 32;
CGDataProviderRef provider = CGDataProviderCreateWithData (NULL, bits, byteCount, NULL);
CGBitmapInfo bitmapInfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Big;
image = CGImageCreate (size.x, size.y, 8, bitDepth, rowBytes, GetCGColorSpace (), bitmapInfo, provider, NULL, false, kCGRenderingIntentDefault);
CGDataProviderRelease (provider);
dirty = false;
}
return image;
}
//-----------------------------------------------------------------------------
void CGDrawContext::init ()
{
CGContextSaveGState (cgContext);
CGContextSetAllowsAntialiasing (cgContext, true);
CGContextSetAllowsFontSmoothing (cgContext, true);
CGContextSetAllowsFontSubpixelPositioning (cgContext, true);
CGContextSetAllowsFontSubpixelQuantization (cgContext, true);
CGContextSetShouldAntialias (cgContext, false);
CGContextSetFillColorSpace (cgContext, GetCGColorSpace ());
CGContextSetStrokeColorSpace (cgContext, GetCGColorSpace ());
CGContextSaveGState (cgContext);
CGAffineTransform cgCTM = CGAffineTransformMake (1.0, 0.0, 0.0, -1.0, 0.0, 0.0);
CGContextSetTextMatrix (cgContext, cgCTM);
CDrawContext::init ();
}
//-----------------------------------------------------------------------------
CGColorRef getCGColor (const CColor& color)
{
CGColorMap& colorMap = getColorMap ();
CGColorMap::const_iterator it = colorMap.find (color);
if (it != colorMap.end ())
{
CGColorRef result = it->second;
return result;
}
const CGFloat components[] = {
static_cast<CGFloat> (color.red / 255.),
static_cast<CGFloat> (color.green / 255.),
static_cast<CGFloat> (color.blue / 255.),
static_cast<CGFloat> (color.alpha / 255.)
};
CGColorRef result = CGColorCreate (GetCGColorSpace (), components);
colorMap.insert (std::make_pair (color, result));
return result;
}
