Basic IOS Utilities for Cinder

ExampleUsage.cpp

// normal TextLayout code
TextLayout layout;
layout.clear( ColorA( CM_HSV, 0.0f, 0.0f, 0.0f, 0.0f ) );
layout.setFont( mDateFont );
layout.setColor( ColorA( CM_HSV, 0.0f, 0.0f, 1.0f, 1.0f ) );
layout.setLeadingOffset( 4.0f );

// write some 
layout.addLine( "Some Text" );
layout.addLine( "Some more text." );

// render with alpha, per usual
Surface render = layout.render( true );
// create a square surface to play nice with openGL (this uses our new function)
Surface output( IOSUtils::textBox( render ) );
// turn it into a texture
mDateTexture = gl::Texture( output );

Utilities.hpp

//
//  Utilities.hpp
//  WaterController
//
//  Created by David Wicks on 4/9/11.
//  Copyright 2011 __MyCompanyName__. All rights reserved.
//

#pragma once
#include "cinder/Vector.h"
#include "cinder/Surface.h"

namespace sansumbrella
{
    struct IOSUtils
    {
        static ci::Vec2f screenify( const ci::Vec2f& in )
        {
            return ci::Vec2f( 1024.0f - in.y, in.x ); 
        }
        
        static ci::Surface textBox( const ci::Surface in )
        {
            int maxDimension = in.getWidth() > in.getHeight() ? in.getWidth() : in.getHeight();
            // create a transparent texture
            ci::Surface s( maxDimension, maxDimension, true );
            ci::Surface::Iter iter = s.getIter();
            // make sure it's transparent 
            while( iter.line() ) { while( iter.pixel() ) { iter.a() = 0; } }
            s.copyFrom( in, s.getBounds() );
            return s;
        }
    };
}