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File: pdflib.php
<?php
// (c) Copyright 2002-2015 by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id: pdflib.php 53803 2015-02-06 00:42:50Z jyhem $

/* This library is LGPL
 * written by Louis-Philippe Huberdeau
 *
 * vim: fdm=marker tabstop=4 shiftwidth=4 noet:
 *
 * This file contains the PDF graphic renderer. (Using PDFLib)
 */
require_once('lib/graph-engine/core.php');

class PDFLib_GRenderer extends GRenderer // {{{1
{
	public $pdf;
	public $styles;
	public $font;

	public $width;
	public $height;

	function PDFLib_GRenderer( $format = null, $orientation = 'landscape' ) // {{{2
	{
		// Null size does not create a graphic.
		$this->styles = array();
		$this->font = null;

		if ( !is_null($format) ) {
			$size = $this->_getFormat($format, $orientation);
			$this->width = $size[0];
			$this->height = $size[1];

			$this->pdf = pdf_new();
			pdf_open_file($this->pdf, '');
			pdf_begin_page($this->pdf, $this->width, $this->height);

			$this->font = pdf_findfont($this->pdf, 'Helvetica', 'builtin', 0);
		}
	}

	function addLink( $target, $left, $top, $right, $bottom, $title = null ) // {{{2
	{
	}

	function drawLine( $x1, $y1, $x2, $y2, $style ) // {{{2
	{
		$this->_convertPosition($x1, $y1);
		$this->_convertPosition($x2, $y2);

		pdf_setcolor(
			$this->pdf,
			'stroke',
			$style['line'][0],
			$style['line'][1],
			$style['line'][2],
			$style['line'][3],
			$style['line'][4]
		);

		pdf_setlinewidth($this->pdf, $style['line-width']);

		pdf_moveto($this->pdf, $x1, $y1);
		pdf_lineto($this->pdf, $x2, $y2);
		pdf_stroke($this->pdf);
	}

	function drawRectangle( $left, $top, $right, $bottom, $style ) // {{{2
	{
		$this->_convertPosition($left, $top);
		$this->_convertPosition($right, $bottom);

		pdf_setcolor(
			$this->pdf,
			'stroke',
			$style['line'][0],
			$style['line'][1],
			$style['line'][2],
			$style['line'][3],
			$style['line'][4]
		);

		if ( isset( $style['fill'] ) )
			pdf_setcolor(
				$this->pdf,
				'fill',
				$style['fill'][0],
				$style['fill'][1],
				$style['fill'][2],
				$style['fill'][3],
				$style['fill'][4]
			);

		pdf_setlinewidth($this->pdf, $style['line-width']);

		pdf_rect($this->pdf, $left, $top, $right - $left, $bottom - $top);

		if ( isset( $style['fill'] ) )
			pdf_fill_stroke($this->pdf);
		else
			pdf_stroke($this->pdf);
	}

	function drawPie( $centerX, $centerY, $radius, $begin, $end, $style ) // {{{2
	{
		$this->_convertPosition($centerX, $centerY);
		$radius = $radius * min($this->width, $this->height);

		pdf_setcolor(
			$this->pdf,
			'stroke',
			$style['line'][0],
			$style['line'][1],
			$style['line'][2],
			$style['line'][3],
			$style['line'][4]
		);

		if ( isset( $style['fill'] ) )
			pdf_setcolor(
				$this->pdf,
				'fill',
				$style['fill'][0],
				$style['fill'][1],
				$style['fill'][2],
				$style['fill'][3],
				$style['fill'][4]
			);

		pdf_setlinewidth($this->pdf, $style['line-width']);

		pdf_moveto($this->pdf, $centerX, $centerY);
		pdf_arc($this->pdf, $centerX, $centerY, $radius, $begin, $end);
		pdf_lineto($this->pdf, $centerX, $centerY);

		if ( isset( $style['fill'] ) )
			pdf_closepath_fill_stroke($this->pdf);
		else
			pdf_closepath_stroke($this->pdf);
	}

	function drawText( $text, $left, $right, $height, $style ) // {{{2
	{
		$h = $height; // Creating duplicate (temp)
		$this->_convertPosition($left, $height);
		$this->_convertPosition($right, $h);

		pdf_setcolor(
			$this->pdf,
			'fill',
			$style['fill'][0],
			$style['fill'][1],
			$style['fill'][2],
			$style['fill'][3],
			$style['fill'][4]
		);

		pdf_setfont($this->pdf, $this->font, $style['font']);
		pdf_show_boxed($this->pdf, $text, $left, $height - $style['font'], $right - $left, $style['font'], $style['align'], '');
	}

	function getTextWidth( $text, $style ) // {{{2
	{
		return pdf_stringwidth($this->pdf, $text, $this->font, $style['font']) / $this->width;
	}

	function getTextHeight( $style ) // {{{2
	{
		return $style['font'] / $this->height;
	}

	function getStyle( $name ) // {{{2
	{
		if ( isset( $this->styles[$name] ) )
			return $this->styles[$name];

		return $this->styles[$name] = $this->_findStyle($name);
	}

	function httpOutput( $filename ) // {{{2
	{
		pdf_end_page($this->pdf);
		pdf_close($this->pdf);

		$buf = pdf_get_buffer($this->pdf);
		$len = strlen($buf);

		header("Content-type: application/pdf");
		header("Content-Length: $len");
		header("Content-Disposition: inline; filename=$name");
		echo $buf;

		pdf_delete($this->pdf);
	}

	function writeToStream( $stream ) // {{{2
	{
		pdf_end_page($this->pdf);
		pdf_close($this->pdf);

		$buf = pdf_get_buffer($this->pdf);
		fwrite($stream, $buf);

		pdf_delete($this->pdf);
	}

	function _convertLength( $value, $type ) // {{{2
	{
		// $type is either 'width' or 'height'
		// $value is a 0-1 float
		return floor($value * $this->$type);
	}

	function _convertPosition( &$x, &$y ) // {{{2
	{
		// Parameters passed by ref!
		$x = $this->_convertLength($x, 'width');
		$y = $this->height - $this->_convertLength($y, 'height');
	}

	function _findStyle( $name ) // {{{2
	{
		$parts = explode('-', $name);
		$style = array();

		switch( $parts[0] )
		{
		case 'Thin':
			$style['line-width'] = 1;
			array_shift($parts);
			break;
		case 'Bold':
			$style['line-width'] = 2;
			array_shift($parts);
			break;
		case 'Bolder':
			$style['line-width'] = 3;
			array_shift($parts);
			break;
		case 'Large':
			$style['font'] = 16;
			array_shift($parts);
			break;
		case 'Small':
			$style['font'] = 8;
			array_shift($parts);
			break;
		case 'Normal':
			array_shift($parts);
		default:
			if ( $parts[0] == 'Text' )
				$style['font'] = 12;
			else
				$style['line-width'] = 1;
			break;
		}

		switch( $parts[0] )
		{
		case 'LineStroke':
			$style['line'] = $this->_getColor($parts[1]);
			break;
		case 'FillStroke':
			$style['fill'] = $this->_getColor($parts[1]);
			$style['line'] = $this->_getColor('Black');
			break;
		case 'Text':
			$style['fill'] = $this->_getColor('Black');
			if ( !isset( $parts[1] ))
				$parts[1] = null;
			switch( $parts[1] )
			{
			case 'Center':
				$style['align'] = 'center';
				break;
			case 'Right':
				$style['align'] = 'right';
				break;
			case 'Left':
			default:
				$style['align'] = 'left';
				break;
			}
			break;
		default:
			return GRenderer::getStyle($name);
		}

		return $style;
	}

	function _getColor( $name ) // {{{2
	{
		$c = array( 'rgb' );
		$color = $this->_getRawColor(strtolower($name));
		foreach ( $color as $col )
			$c[] = $col / 255;

		$c[] = null;

		return $c;
	}

	function _getFormat( $format, $orientation ) // {{{2
	{
		/*
			Taken from lib/pdflib/class.ezpdf.php
			Copyright notices are in that file.
		*/
		switch (strtoupper($format))
		{
		case '4A0': $size = array(4767.87,6740.79);
			break;
		case '2A0': $size = array(3370.39,4767.87);
			break;
		case 'A0': $size = array(2383.94,3370.39);
			break;
		case 'A1': $size = array(1683.78,2383.94);
			break;
		case 'A2': $size = array(1190.55,1683.78);
			break;
		case 'A3': $size = array(841.89,1190.55);
			break;
		case 'A4': $size = array(595.28,841.89);
			break;
		case 'A5': $size = array(419.53,595.28);
			break;
		case 'A6': $size = array(297.64,419.53);
			break;
		case 'A7': $size = array(209.76,297.64);
			break;
		case 'A8': $size = array(147.40,209.76);
			break;
		case 'A9': $size = array(104.88,147.40);
			break;
		case 'A10': $size = array(73.70,104.88);
			break;
		case 'B0': $size = array(2834.65,4008.19);
			break;
		case 'B1': $size = array(2004.09,2834.65);
			break;
		case 'B2': $size = array(1417.32,2004.09);
			break;
		case 'B3': $size = array(1000.63,1417.32);
			break;
		case 'B4': $size = array(708.66,1000.63);
			break;
		case 'B5': $size = array(498.90,708.66);
			break;
		case 'B6': $size = array(354.33,498.90);
			break;
		case 'B7': $size = array(249.45,354.33);
			break;
		case 'B8': $size = array(175.75,249.45);
			break;
		case 'B9': $size = array(124.72,175.75);
			break;
		case 'B10': $size = array(87.87,124.72);
			break;
		case 'C0': $size = array(2599.37,3676.54);
			break;
		case 'C1': $size = array(1836.85,2599.37);
			break;
		case 'C2': $size = array(1298.27,1836.85);
			break;
		case 'C3': $size = array(918.43,1298.27);
			break;
		case 'C4': $size = array(649.13,918.43);
			break;
		case 'C5': $size = array(459.21,649.13);
			break;
		case 'C6': $size = array(323.15,459.21);
			break;
		case 'C7': $size = array(229.61,323.15);
			break;
		case 'C8': $size = array(161.57,229.61);
			break;
		case 'C9': $size = array(113.39,161.57);
			break;
		case 'C10': $size = array(79.37,113.39);
			break;
		case 'RA0': $size = array(2437.80,3458.27);
			break;
		case 'RA1': $size = array(1729.13,2437.80);
			break;
		case 'RA2': $size = array(1218.90,1729.13);
			break;
		case 'RA3': $size = array(864.57,1218.90);
			break;
		case 'RA4': $size = array(609.45,864.57);
			break;
		case 'SRA0': $size = array(2551.18,3628.35);
			break;
		case 'SRA1': $size = array(1814.17,2551.18);
			break;
		case 'SRA2': $size = array(1275.59,1814.17);
			break;
		case 'SRA3': $size = array(907.09,1275.59);
			break;
		case 'SRA4': $size = array(637.80,907.09);
			break;
		case 'LETTER': $size = array(612.00,792.00);
			break;
		case 'LEGAL': $size = array(612.00,1008.00);
			break;
		case 'EXECUTIVE': $size = array(521.86,756.00);
			break;
		case 'FOLIO': $size = array(612.00,936.00);
			break;
		}

		if ( strtolower($orientation) == 'landscape' ) {
			$a=$size[1];
			$size[1]=$size[0];
			$size[0]=$a;
		}

		return $size;
	}
} // }}}1