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<?php
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2003 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Peter Bowyer <peter@mapledesign.co.uk> |
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// | Alan Knowles <alan@akbkhome.com> |
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// +----------------------------------------------------------------------+
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require_once 'Image/Transform/Driver/GD.php';
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/**
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* This driver is for GD1 or the non-bundled version of GD2
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*
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* @package
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* @author NAWAL ASWAN
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* @copyright Copyright (c) 2003
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* @version $Id: GD1.php,v 1.5 2007/04/19 16:36:09 dufuz Exp $
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* @access public
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**/
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Class Image_Transform_Driver_GD1 extends Image_Transform_Driver_GD
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{
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/**
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* Check settings
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*
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* @return mixed true or or a PEAR error object on error
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*
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* @see PEAR::isError()
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*/
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function Image_Transform_Driver_GD1()
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{
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$this->__construct();
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} // End function Image
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/**
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* Check settings
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*
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* @return mixed true or or a PEAR error object on error
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*
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* @see PEAR::isError()
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*/
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function __construct()
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{
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parent::__construct();
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} // End function Image
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/**
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* Resize Action
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*
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* For GD 2.01+ the new copyresampled function is used
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* It uses a bicubic interpolation algorithm to get far
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* better result.
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*
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* @param $new_x int new width
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* @param $new_y int new height
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* @param mixed $options Optional parameters
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*
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* @return true on success or PEAR Error object on error
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* @see PEAR::isError()
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*/
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function _resize($new_x, $new_y, $options = null)
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{
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if ($this->resized === true) {
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return PEAR::raiseError('You have already resized the image without saving it. Your previous resizing will be overwritten', null, PEAR_ERROR_TRIGGER, E_USER_NOTICE);
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}
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$new_img =ImageCreate($new_x,$new_y);
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ImageCopyResized($new_img, $this->imageHandle, 0, 0, 0, 0, $new_x, $new_y, $this->img_x, $this->img_y);
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$this->old_image = $this->imageHandle;
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$this->imageHandle = $new_img;
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$this->resized = true;
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$this->new_x = $new_x;
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$this->new_y = $new_y;
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return true;
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}
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function rotate($angle, $options = null)
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{
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if ($options == null){
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$autoresize = true;
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$color_mask = array(255,255,0);
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} else {
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extract($options);
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}
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while ($angle <= -45) {
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$angle += 360;
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}
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while ($angle > 270) {
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$angle -= 360;
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}
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$t = deg2rad($angle);
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if (!is_array($color_mask)) {
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// Not already in numberical format, so we convert it.
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if ($color_mask{0} == '#'){
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$color_mask = $this->colorhex2colorarray($color_mask);
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} else {
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include_once 'Image/Transform/Driver/ColorsDefs.php';
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$color_mask = isset($colornames[$color_mask])?$colornames[$color_mask]:false;
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}
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}
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// Do not round it, too much lost of quality
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$cosT = cos($t);
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$sinT = sin($t);
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$img =& $this->imageHandle;
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$width = $max_x = $this->img_x;
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$height = $max_y = $this->img_y;
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$min_y = 0;
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$min_x = 0;
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$x1 = round($max_x/2,0);
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$y1 = round($max_y/2,0);
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if ( $autoresize ){
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$t = abs($t);
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$a = round($angle,0);
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switch((int)($angle)){
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case 0:
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$width2 = $width;
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$height2 = $height;
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break;
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case 90:
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$width2 = $height;
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$height2 = $width;
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break;
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case 180:
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$width2 = $width;
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$height2 = $height;
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break;
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case 270:
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$width2 = $height;
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$height2 = $width;
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break;
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default:
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$width2 = (int)(abs(sin($t) * $height + cos($t) * $width));
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$height2 = (int)(abs(cos($t) * $height+sin($t) * $width));
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}
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$width2 -= $width2%2;
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$height2 -= $height2%2;
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$d_width = abs($width - $width2);
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$d_height = abs($height - $height2);
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$x_offset = $d_width/2;
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$y_offset = $d_height/2;
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$min_x2 = -abs($x_offset);
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$min_y2 = -abs($y_offset);
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$max_x2 = $width2;
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$max_y2 = $height2;
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}
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$img2 = @imagecreateTrueColor($width2,$height2);
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if (!is_resource($img2)) {
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return PEAR::raiseError('Cannot create buffer for the rotataion.',
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null, PEAR_ERROR_TRIGGER, E_USER_NOTICE);
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}
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$this->img_x = $width2;
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$this->img_y = $height2;
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imagepalettecopy($img2,$img);
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$mask = imagecolorresolve($img2,$color_mask[0],$color_mask[1],$color_mask[2]);
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// use simple lines copy for axes angles
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switch ((int)($angle)) {
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case 0:
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imagefill($img2, 0, 0,$mask);
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for ($y = 0; $y < $max_y; $y++) {
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for ($x = $min_x; $x < $max_x; $x++){
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$c = @imagecolorat ( $img, $x, $y);
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imagesetpixel($img2,$x+$x_offset,$y+$y_offset,$c);
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}
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}
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break;
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case 90:
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imagefill ($img2, 0, 0,$mask);
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for ($x = $min_x; $x < $max_x; $x++){
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for ($y=$min_y; $y < $max_y; $y++) {
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$c = imagecolorat ( $img, $x, $y);
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imagesetpixel($img2,$max_y-$y-1,$x,$c);
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}
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}
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break;
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case 180:
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imagefill ($img2, 0, 0,$mask);
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for ($y=0; $y < $max_y; $y++) {
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for ($x = $min_x; $x < $max_x; $x++){
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$c = @imagecolorat ( $img, $x, $y);
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imagesetpixel($img2, $max_x2-$x-1, $max_y2-$y-1, $c);
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}
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}
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break;
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case 270:
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imagefill ($img2, 0, 0,$mask);
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for ($y=0; $y < $max_y; $y++) {
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for ($x = $max_x; $x >= $min_x; $x--){
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$c = @imagecolorat ( $img, $x, $y);
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imagesetpixel($img2,$y,$max_x-$x-1,$c);
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}
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}
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break;
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// simple reverse rotation algo
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default:
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$i=0;
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for ($y = $min_y2; $y < $max_y2; $y++){
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// Algebra :)
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$x2 = round((($min_x2-$x1) * $cosT) + (($y-$y1) * $sinT + $x1),0);
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$y2 = round((($y-$y1) * $cosT - ($min_x2-$x1) * $sinT + $y1),0);
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for ($x = $min_x2; $x < $max_x2; $x++){
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// Check if we are out of original bounces, if we are
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// use the default color mask
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if ( $x2>=0 && $x2<$max_x && $y2>=0 && $y2<$max_y ){
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$c = imagecolorat ( $img, $x2, $y2);
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} else {
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$c = $mask;
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}
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imagesetpixel($img2,$x+$x_offset,$y+$y_offset,$c);
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// round verboten!
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$x2 += $cosT;
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$y2 -= $sinT;
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}
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}
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break;
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}
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$this->imageHandle = $img2;
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return true;
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}
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} // End class ImageGD
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