I'm rendering text into a bitmap image context (in fact just a single letter, with a small drop-shadow). I am unable to get this text to be drawn anti-aliased, despite turning on all the shoulds and allows that pertain to this. Is anti-aliasing supported in a bitmap context on iOS? It seems to render text to the screen anti-aliased, what' s the difference? Or have I missed something? Here's the code:
CGColorSpaceRef colourSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef context = CGBitmapContextCreate( NULL, PLAYER_IMAGE_SIZE, PLAYER_IMAGE_SIZE, 8, PLAYER_IMAGE_SIZE * 4, colourSpace, kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrderDefault); CGColorSpaceRelease( colourSpace ); UIGraphicsPushContext( context ); CGContextSetAllowsAntialiasing( context, true ); CGContextSetShouldAntialias( context, true ); CGContextSetInterpolationQuality( context, kCGInterpolationHigh ); UIColor* textColour = [colour shadowWithLevel:0.25]; // category methods on UIColor UIColor* shadowColour = [colour highlightWithLevel:0.5]; CGContextSetAllowsFontSmoothing( context, true ); CGContextSetShouldSmoothFonts( context, true ); CGContextSetShadowWithColor( context, CGSizeMake( 3, flipped? 3 : -3 ), 4.0, [shadowColour CGColor]); if( !flipped ) { CGContextTranslateCTM( context, 0, PLAYER_IMAGE_SIZE ); CGContextScaleCTM( context, 1.0, -1.0 ); } UIFont* font = [UIFont boldSystemFontOfSize:PLAYER_IMAGE_SIZE * 0.5]; CGSize box = [is sizeWithFont:font]; CGRect isBox; isBox.size = box; isBox.origin.x = ( PLAYER_IMAGE_SIZE * 0.5 ) - ( box.width * 0.5 ); isBox.origin.y = ( PLAYER_IMAGE_SIZE * 0.5 ) - ( box.height * 0.5 ); [textColour set]; [is drawInRect:isBox withFont:font lineBreakMode:UILineBreakModeClip]; CGImageRef image = CGBitmapContextCreateImage( context ); CGContextRelease( context ); UIGraphicsPopContext(); return image; --Graham _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com