gistfile1.txt

import device;

exports.TARGET_WIDTH = 576;

// fixed aspect ratio for main content area
exports.CONTENT_RATIO = 2 / 3;

// maximum aspect ratio for background image
exports.BG_RATIO = 9 / 16;

// screen attributes
exports.ABS_WIDTH = device.screen.width;
exports.ABS_HEIGHT = device.screen.height;
exports.ABS_RATIO = exports.ABS_WIDTH / exports.ABS_HEIGHT;

// ---
exports.IS_LANDSCAPE = false;

if (exports.IS_LANDSCAPE) {

// TODO

} else {

	// top-level scale
	if (exports.ABS_RATIO > exports.CONTENT_RATIO) {
		// shrink width, fit height
		exports.CONTENT_HEIGHT = exports.TARGET_WIDTH / exports.CONTENT_RATIO;
		exports.CONTENT_WIDTH = exports.CONTENT_HEIGHT * exports.CONTENT_RATIO;
		exports.SCALE = exports.ABS_HEIGHT / exports.CONTENT_HEIGHT;
	} else {
		// shrink height, fit width
		exports.SCALE = exports.ABS_WIDTH / exports.TARGET_WIDTH;
		exports.CONTENT_WIDTH = exports.TARGET_WIDTH;
		exports.CONTENT_HEIGHT = exports.CONTENT_WIDTH / exports.CONTENT_RATIO;
	}

	// for full screen views, compute the additional scale factor required to
	// stretch the view's width to the width of the screen, if necessary
	exports.FULL_SCREEN_SCALE_RELATIVE = exports.ABS_WIDTH / exports.TARGET_WIDTH / exports.SCALE;

	// FULL_SCREEN_SCALE_RELATIVE is the scale to be applied on top of SCALE to scale
	// a full-screen view.  FULL_SCREEN_SCALE scales an absolute screen coordinate to the
	// full screen scale
	exports.FULL_SCREEN_SCALE = exports.FULL_SCREEN_SCALE_RELATIVE * exports.SCALE;
	exports.FULL_SCREEN_WIDTH = exports.TARGET_WIDTH;
	exports.FULL_SCREEN_HEIGHT = exports.ABS_HEIGHT / exports.FULL_SCREEN_SCALE;
}