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Text.php
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	<?php
	/* Libchart - PHP chart library
	* Copyright (C) 2005-2007 Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*
	*/

	defined('FULL_PATH') or die('restricted access!');

	/**
	* Text drawing helper
	*
	* @author Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
	*/
	class LibchartText {
	public $HORIZONTAL_LEFT_ALIGN = 1;
	public $HORIZONTAL_CENTER_ALIGN = 2;
	public $HORIZONTAL_RIGHT_ALIGN = 4;
	public $VERTICAL_TOP_ALIGN = 8;
	public $VERTICAL_CENTER_ALIGN = 16;
	public $VERTICAL_BOTTOM_ALIGN = 32;

	/**
	* Creates a new text drawing helper.
	*/
	public function __construct() {
	$baseDir = dirname(__FILE__) . "/../../../";

	// Free low-res fonts based on Bitstream Vera <http://dejavu.sourceforge.net/wiki/>
	$this->fontCondensed = $baseDir . "fonts/DejaVuSansCondensed.ttf";
	$this->fontCondensedBold = $baseDir . "fonts/DejaVuSansCondensed-Bold.ttf";
	}

	/**
	* Print text.
	*
	* @param Image GD image
	* @param integer text coordinate (x)
	* @param integer text coordinate (y)
	* @param Color text color
	* @param string text value
	* @param string font file name
	* @param bitfield text alignment
	*/
	public function printText($img, $px, $py, $color, $text, $fontFileName, $align = 0) {
	if (!($align & $this->HORIZONTAL_CENTER_ALIGN) && !($align & $this->HORIZONTAL_RIGHT_ALIGN)) {
	$align \|= $this->HORIZONTAL_LEFT_ALIGN;
	}

	if (!($align & $this->VERTICAL_CENTER_ALIGN) && !($align & $this->VERTICAL_BOTTOM_ALIGN)) {
	$align \|= $this->VERTICAL_TOP_ALIGN;
	}

	$fontSize = 8;
	$lineSpacing = 1;

	list ($llx, $lly, $lrx, $lry, $urx, $ury, $ulx, $uly) = imageftbbox($fontSize, 0, $fontFileName, $text, array("linespacing" => $lineSpacing));

	$textWidth = $lrx - $llx;
	$textHeight = $lry - $ury;

	$angle = 0;

	if ($align & $this->HORIZONTAL_CENTER_ALIGN) {
	$px -= $textWidth / 2;
	}

	if ($align & $this->HORIZONTAL_RIGHT_ALIGN) {
	$px -= $textWidth;
	}

	if ($align & $this->VERTICAL_CENTER_ALIGN) {
	$py += $textHeight / 2;
	}

	if ($align & $this->VERTICAL_TOP_ALIGN) {
	$py += $textHeight;
	}

	imagettftext($img, $fontSize, $angle, $px, $py, $color->getColor($img), $fontFileName, $text);
	}

	/**
	* Print text centered horizontally on the image.
	*
	* @param Image GD image
	* @param integer text coordinate (y)
	* @param Color text color
	* @param string text value
	* @param string font file name
	*/
	public function printCentered($img, $py, $color, $text, $fontFileName) {
	$this->printText($img, imagesx($img) / 2, $py, $color, $text, $fontFileName, $this->HORIZONTAL_CENTER_ALIGN \| $this->VERTICAL_CENTER_ALIGN);
	}

	/**
	* Print text in diagonal.
	*
	* @param Image GD image
	* @param integer text coordinate (x)
	* @param integer text coordinate (y)
	* @param Color text color
	* @param string text value
	*/
	public function printDiagonal($img, $px, $py, $color, $text) {
	$fontSize = 8;
	$fontFileName = $this->fontCondensed;

	$lineSpacing = 1;

	list ($lx, $ly, $rx, $ry) = imageftbbox($fontSize, 0, $fontFileName, $text, array("linespacing" => $lineSpacing));
	$textWidth = $rx - $lx;

	$angle = -45;

	imagettftext($img, $fontSize, $angle, $px, $py, $color->getColor($img), $fontFileName, $text);
	}
	}

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