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308 lines
9.1 KiB
308 lines
9.1 KiB
<?php
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// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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//
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// All Rights Reserved. See copyright.txt for details and a complete list of authors.
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// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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// $Id$
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/* This library is LGPL
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* written by Louis-Philippe Huberdeau
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*
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* vim: fdm=marker tabstop=4 shiftwidth=4 noet:
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*
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* This file contains the GD graphic renderer.
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*/
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require_once('lib/graph-engine/core.php');
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class GD_GRenderer extends GRenderer // {{{1
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{
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public $gd;
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public $styles;
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public $colors;
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public $fonts;
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public $format;
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public $width;
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public $height;
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public $imageMap;
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public function __construct($width = 0, $height = 0, $format = 'png') // {{{2
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{
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// Null size does not create a graphic.
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$this->styles = [];
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$this->colors = [];
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$this->fonts = [];
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if ($width !== 0 && $height !== 0) {
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$this->gd = imagecreate($width, $height);
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$this->_getColor('white');
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}
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$this->format = $format;
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$this->width = $width;
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$this->height = $height;
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}
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public function addLink($target, $left, $top, $right, $bottom, $title = null) // {{{2
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{
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$this->_convertPosition($left, $top);
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$this->_convertPosition($right, $bottom);
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$target = htmlspecialchars($target);
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$title = htmlspecialchars($title);
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$this->imageMap .= "<area shape=\"rect\" coords=\"$left,$top,$right,$bottom\" href=\"$target\" alt=\"$title\" title=\"$title\"/>\n";
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}
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public function drawLine($x1, $y1, $x2, $y2, $style) // {{{2
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{
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$this->_convertPosition($x1, $y1);
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$this->_convertPosition($x2, $y2);
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imagesetthickness($this->gd, $style['line-width']);
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imageline($this->gd, $x1, $y1, $x2, $y2, $style['line']);
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}
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public function drawRectangle($left, $top, $right, $bottom, $style) // {{{2
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{
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if ($top > $bottom) {
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// Filled rect has a problem when coordinates are inverted.
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$a = $top;
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$top = $bottom;
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$bottom = $a;
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}
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if ($left > $right) {
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// Filled rect has a problem when coordinates are inverted.
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$a = $left;
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$left = $right;
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$right = $a;
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}
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$this->_convertPosition($left, $top);
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$this->_convertPosition($right, $bottom);
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if (isset($style['fill'])) {
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imagefilledrectangle($this->gd, $left, $top, $right, $bottom, $style['fill']);
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}
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imagesetthickness($this->gd, $style['line-width']);
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imagerectangle($this->gd, $left, $top, $right, $bottom, $style['line']);
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}
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public function drawPie($centerX, $centerY, $radius, $begin, $end, $style) // {{{2
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{
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$radius = $radius * 2;
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if ($begin != 0 || $end != 360) {
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$tmp = -$begin;
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$begin = -$end;
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$end = $tmp;
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}
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$this->_convertPosition($centerX, $centerY);
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$radius = $radius * min($this->width, $this->height);
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imagefilledarc($this->gd, $centerX, $centerY, $radius, $radius, $begin, $end, $style['fill'], IMG_ARC_PIE);
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imagesetthickness($this->gd, $style['line-width']);
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imagefilledarc($this->gd, $centerX, $centerY, $radius, $radius, $begin, $end, $style['line'], IMG_ARC_NOFILL | IMG_ARC_EDGED);
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}
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public function drawText($text, $left, $right, $height, $style) // {{{2
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{
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$h = $height; // Creating duplicate (temp)
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$this->_convertPosition($left, $height);
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$this->_convertPosition($right, $h);
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switch ($style['align']) {
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case 'left':
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$this->_drawLeftText($text, $left, $height, $style);
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break;
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case 'center':
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$this->_drawCenterText($text, $left, $right, $height, $style);
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break;
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case 'right':
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$this->_drawRightText($text, $right, $height, $style);
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break;
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}
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}
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public function getTextWidth($text, $style) // {{{2
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{
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return imagefontwidth($style['font']) * strlen($text) / $this->width;
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}
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public function getTextHeight($style) // {{{2
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{
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return imagefontheight($style['font']) / $this->height;
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}
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public function getStyle($name) // {{{2
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{
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if (isset($this->styles[$name])) {
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return $this->styles[$name];
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}
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return $this->styles[$name] = $this->_findStyle($name);
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}
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public function httpOutput($filename) // {{{2
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{
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switch ($this->format) {
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case 'png':
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header("Content-type: image/png");
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imagepng($this->gd);
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break;
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case 'jpg':
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header("Content-type: image/jpeg");
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imagejpeg($this->gd);
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break;
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default:
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echo "Unknown Format: {$this->format}\n";
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}
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imagedestroy($this->gd);
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}
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public function writeToStream($stream) // {{{2
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{
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ob_start();
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switch ($this->format) {
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case 'png':
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imagepng($this->gd);
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break;
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case 'jpg':
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imagejpeg($this->gd);
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break;
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default:
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echo "Unknown Format: {$this->format}\n";
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}
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fwrite($stream, ob_get_contents());
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ob_end_clean();
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imagedestroy($this->gd);
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}
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public function getMapContent() // {{{2
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{
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return $this->imageMap;
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}
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public function _convertLength($value, $type) // {{{2
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{
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// $type is either 'width' or 'height'
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// $value is a 0-1 float
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return floor($value * $this->$type);
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}
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public function _convertPosition(&$x, &$y) // {{{2
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{
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// Parameters passed by ref!
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$x = $this->_convertLength($x, 'width');
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$y = $this->_convertLength($y, 'height');
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}
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public function _findStyle($name) // {{{2
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{
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$parts = explode('-', $name);
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$style = [];
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switch ($parts[0]) {
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case 'Thin':
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$style['line-width'] = 1;
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array_shift($parts);
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break;
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case 'Bold':
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$style['line-width'] = 2;
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array_shift($parts);
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break;
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case 'Bolder':
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$style['line-width'] = 3;
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array_shift($parts);
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break;
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case 'Large':
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$style['font'] = 5;
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array_shift($parts);
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break;
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case 'Small':
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$style['font'] = 2;
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array_shift($parts);
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break;
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case 'Normal':
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array_shift($parts);
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break;
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default:
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if ($parts[0] == 'Text') {
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$style['font'] = 4;
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} else {
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$style['line-width'] = 1;
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}
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break;
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}
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switch ($parts[0]) {
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case 'LineStroke':
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$style['line'] = $this->_getColor($parts[1]);
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break;
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case 'FillStroke':
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$style['fill'] = $this->_getColor($parts[1]);
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$style['line'] = $this->_getColor('Black');
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break;
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case 'Text':
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if (! isset($parts[1])) {
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$parts[1] = null;
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}
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switch ($parts[1]) {
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case 'Center':
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$style['align'] = 'center';
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break;
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case 'Right':
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$style['align'] = 'right';
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break;
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case 'Left':
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default:
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$style['align'] = 'left';
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break;
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}
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break;
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default:
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return GRenderer::getStyle($name);
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}
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return $style;
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}
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public function _getColor($name) // {{{2
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{
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$name = strtolower($name);
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if (isset($this->colors[$name])) {
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return $this->colors[$name];
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}
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return $this->colors[$name] = $this->_findColor($name);
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}
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public function _findColor($name) // {{{2
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{
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$color = $this->_getRawColor($name);
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return imagecolorallocate($this->gd, (int)$color['r'], (int)$color['g'], (int)$color['b']);
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}
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public function _drawLeftText($string, $left, $height, $style) // {{{2
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{
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imagestring($this->gd, $style['font'], $left, $height, $string, $this->_getColor('Black'));
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}
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public function _drawCenterText($string, $left, $right, $height, $style) // {{{2
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{
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$width = imagefontwidth($style['font']) * strlen($string);
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$x = ( $right - $left ) / 2 + $left - $width / 2;
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imagestring($this->gd, $style['font'], $x, $height, $string, $this->_getColor('Black'));
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}
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public function _drawRightText($string, $right, $height, $style) // {{{2
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{
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$width = imagefontwidth($style['font']) * strlen($string);
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$x = $right - $width;
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imagestring($this->gd, $style['font'], $x, $height, $string, $this->_getColor('Black'));
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}
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}
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