File Source for GD.php

<?php
/***********************************************************************
** Title.........: GD Driver
** Version.......: 1.0
** Author........: Xiang Wei ZHUO <wei@zhuo.org>
** Filename......: GD.php
** Last changed..: 30 Aug 2003
** Notes.........: Orginal is from PEAR
**/
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2002 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.02 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Peter Bowyer <peter@mapledesign.co.uk> |
// | Alan Knowles <alan@akbkhome.com> |
// +----------------------------------------------------------------------+
//
// Usage :
// $img = new Image_Transform_GD();
// $angle = -78;
// $img->load('magick.png');
//
// if($img->rotate($angle,array('autoresize'=>true,'color_mask'=>array(255,0,0)))){
// $img->addText(array('text'=>"Rotation $angle",'x'=>0,'y'=>100,'font'=>'/usr/share/fonts/default/TrueType/cogb____.ttf'));
// $img->display();
// } else {
// echo "Error";
// }
//
//
// $Id$
//
// Image Transformation interface using the GD library
//
require_once "Transform.php";
Class Image_Transform_Driver_GD extends Image_Transform
{
/**
* Holds the image file for manipulation
*/
var $imageHandle = '';
/**
* Holds the original image file
*/
var $old_image = '';
/**
* Check settings
*
* @return mixed true or or a PEAR error object on error
*
* @see PEAR::isError()
*/
function Image_Transform_GD()
{
return;
} // End function Image
/**
* Load image
*
* @param string filename
*
* @return mixed none or a PEAR error object on error
* @see PEAR::isError()
*/
function load($image)
{
$this->uid = md5($_SERVER['REMOTE_ADDR']);
$this->image = $image;
$this->_get_image_details($image);
$functionName = 'ImageCreateFrom' . $this->type;
if(function_exists($functionName))
{
$this->imageHandle = $functionName($this->image);
}
} // End load
/**
* addText
*
* @param array options Array contains options
* array(
* 'text' The string to draw
* 'x' Horizontal position
* 'y' Vertical Position
* 'Color' Font color
* 'font' Font to be used
* 'size' Size of the fonts in pixel
* 'resize_first' Tell if the image has to be resized
* before drawing the text
* )
*
* @return none
* @see PEAR::isError()
*/
function addText($params)
{
$default_params = array(
'text' => 'This is Text',
'x' => 10,
'y' => 20,
'color' => array(255,0,0),
'font' => 'Arial.ttf',
'size' => '12',
'angle' => 0,
'resize_first' => false // Carry out the scaling of the image before annotation? Not used for GD
);
$params = array_merge($default_params, $params);
extract($params);
if( !is_array($color) ){
if ($color[0]=='#'){
$this->colorhex2colorarray( $color );
} else {
include_once('Image/Transform/Driver/ColorsDefs.php');
$color = isset($colornames[$color])?$colornames[$color]:false;
}
}
$c = imagecolorresolve ($this->imageHandle, $color[0], $color[1], $color[2]);
if ('ttf' == substr($font, -3)) {
ImageTTFText($this->imageHandle, $size, $angle, $x, $y, $c, $font, $text);
} else {
ImagePSText($this->imageHandle, $size, $angle, $x, $y, $c, $font, $text);
}
return true;
} // End addText
/**
* Rotate image by the given angle
* Uses a fast rotation algorythm for custom angles
* or lines copy for multiple of 90 degrees
*
* @param int $angle Rotation angle
* @param array $options array( 'autoresize'=>true|false,
* 'color_mask'=>array(r,g,b), named color or #rrggbb
* )
* @author Pierre-Alain Joye
* @return mixed none or a PEAR error object on error
* @see PEAR::isError()
*/
function rotate($angle, $options=null)
{
if(function_exists('imagerotate') && false) {
$white = imagecolorallocate ($this->imageHandle, 255, 255, 255);
$this->imageHandle = imagerotate($this->imageHandle, $angle, $white);
return true;
}
if ( $options==null ){
$autoresize = true;
$color_mask = array(255,255,0);
} else {
extract( $options );
}
while ($angle <= -45) {
$angle += 360;
}
while ($angle > 270) {
$angle -= 360;
}
$t = deg2rad($angle);
if( !is_array($color_mask) ){
if ($color[0]=='#'){
$this->colorhex2colorarray( $color_mask );
} else {
include_once('Image/Transform/Driver/ColorDefs.php');
$color = isset($colornames[$color_mask])?$colornames[$color_mask]:false;
}
}
// Do not round it, too much lost of quality
$cosT = cos($t);
$sinT = sin($t);
$img =& $this->imageHandle;
$width = $max_x = $this->img_x;
$height = $max_y = $this->img_y;
$min_y = 0;
$min_x = 0;
$x1 = round($max_x/2,0);
$y1 = round($max_y/2,0);
if ( $autoresize ){
$t = abs($t);
$a = round($angle,0);
switch((int)($angle)){
case 0:
$width2 = $width;
$height2 = $height;
break;
case 90:
$width2 = $height;
$height2 = $width;
break;
case 180:
$width2 = $width;
$height2 = $height;
break;
case 270:
$width2 = $height;
$height2 = $width;
break;
default:
$width2 = (int)(abs(sin($t) * $height + cos($t) * $width));
$height2 = (int)(abs(cos($t) * $height+sin($t) * $width));
}
$width2 -= $width2%2;
$height2 -= $height2%2;
$d_width = abs($width - $width2);
$d_height = abs($height - $height2);
$x_offset = $d_width/2;
$y_offset = $d_height/2;
$min_x2 = -abs($x_offset);
$min_y2 = -abs($y_offset);
$max_x2 = $width2;
$max_y2 = $height2;
}
if(function_exists('ImageCreateTrueColor')){
$img2 =ImageCreateTrueColor($width2,$height2);
} else {
$img2 =ImageCreate($width2,$height2);
}
if ( !is_resource($img2) ){
return false;/*PEAR::raiseError('Cannot create buffer for the rotataion.',
null, PEAR_ERROR_TRIGGER, E_USER_NOTICE);*/
}
$this->img_x = $width2;
$this->img_y = $height2;
imagepalettecopy($img2,$img);
$mask = imagecolorresolve($img2,$color_mask[0],$color_mask[1],$color_mask[2]);
// use simple lines copy for axes angles
switch((int)($angle)){
case 0:
imagefill ($img2, 0, 0,$mask);
for ($y=0; $y < $max_y; $y++) {
for ($x = $min_x; $x < $max_x; $x++){
$c = @imagecolorat ( $img, $x, $y);
imagesetpixel($img2,$x+$x_offset,$y+$y_offset,$c);
}
}
break;
case 90:
imagefill ($img2, 0, 0,$mask);
for ($x = $min_x; $x < $max_x; $x++){
for ($y=$min_y; $y < $max_y; $y++) {
$c = imagecolorat ( $img, $x, $y);
imagesetpixel($img2,$max_y-$y-1,$x,$c);
}
}
break;
case 180:
imagefill ($img2, 0, 0,$mask);
for ($y=0; $y < $max_y; $y++) {
for ($x = $min_x; $x < $max_x; $x++){
$c = @imagecolorat ( $img, $x, $y);
imagesetpixel($img2, $max_x2-$x-1, $max_y2-$y-1, $c);
}
}
break;
case 270:
imagefill ($img2, 0, 0,$mask);
for ($y=0; $y < $max_y; $y++) {
for ($x = $max_x; $x >= $min_x; $x--){
$c = @imagecolorat ( $img, $x, $y);
imagesetpixel($img2,$y,$max_x-$x-1,$c);
}
}
break;
// simple reverse rotation algo
default:
$i=0;
for ($y = $min_y2; $y < $max_y2; $y++){
// Algebra :)
$x2 = round((($min_x2-$x1) * $cosT) + (($y-$y1) * $sinT + $x1),0);
$y2 = round((($y-$y1) * $cosT - ($min_x2-$x1) * $sinT + $y1),0);
for ($x = $min_x2; $x < $max_x2; $x++){
// Check if we are out of original bounces, if we are
// use the default color mask
if ( $x2>=0 && $x2<$max_x && $y2>=0 && $y2<$max_y ){
$c = imagecolorat ( $img, $x2, $y2);
} else {
$c = $mask;
}
imagesetpixel($img2,$x+$x_offset,$y+$y_offset,$c);
// round verboten!
$x2 += $cosT;
$y2 -= $sinT;
}
}
break;
}
$this->old_image = $this->imageHandle;
$this->imageHandle = $img2;
return true;
}
/**
* Resize Action
*
* For GD 2.01+ the new copyresampled function is used
* It uses a bicubic interpolation algorithm to get far
* better result.
*
* @param $new_x int new width
* @param $new_y int new height
*
* @return true on success or pear error
* @see PEAR::isError()
*/
function _resize($new_x, $new_y) {
if ($this->resized === true) {
return false; /*PEAR::raiseError('You have already resized the image without saving it. Your previous resizing will be overwritten', null, PEAR_ERROR_TRIGGER, E_USER_NOTICE);*/
}
if(function_exists('ImageCreateTrueColor')){
$new_img =ImageCreateTrueColor($new_x,$new_y);
} else {
$new_img =ImageCreate($new_x,$new_y);
}
if(function_exists('ImageCopyResampled')){
ImageCopyResampled($new_img, $this->imageHandle, 0, 0, 0, 0, $new_x, $new_y, $this->img_x, $this->img_y);
} else {
ImageCopyResized($new_img, $this->imageHandle, 0, 0, 0, 0, $new_x, $new_y, $this->img_x, $this->img_y);
}
$this->old_image = $this->imageHandle;
$this->imageHandle = $new_img;
$this->resized = true;
$this->new_x = $new_x;
$this->new_y = $new_y;
return true;
}
/**
* Crop the image
*
* @param int $crop_x left column of the image
* @param int $crop_y top row of the image
* @param int $crop_width new cropped image width
* @param int $crop_height new cropped image height
*/
function crop($new_x, $new_y, $new_width, $new_height)
{
if(function_exists('ImageCreateTrueColor')){
$new_img =ImageCreateTrueColor($new_width,$new_height);
} else {
$new_img =ImageCreate($new_width,$new_height);
}
if(function_exists('ImageCopyResampled')){
ImageCopyResampled($new_img, $this->imageHandle, 0, 0, $new_x, $new_y,$new_width,$new_height,$new_width,$new_height);
} else {
ImageCopyResized($new_img, $this->imageHandle, 0, 0, $new_x, $new_y, $new_width,$new_height,$new_width,$new_height);
}
$this->old_image = $this->imageHandle;
$this->imageHandle = $new_img;
$this->resized = true;
$this->new_x = $new_x;
$this->new_y = $new_y;
return true;
}
/**
* Flip the image horizontally or vertically
*
* @param boolean $horizontal true if horizontal flip, vertical otherwise
*/
function flip($horizontal)
{
if(!$horizontal) {
$this->rotate(180);
}
$width = imagesx($this->imageHandle);
$height = imagesy($this->imageHandle);
for ($j = 0; $j < $height; $j++) {
$left = 0;
$right = $width-1;
while ($left < $right) {
//echo " j:".$j." l:".$left." r:".$right."\n<br>";
$t = imagecolorat($this->imageHandle, $left, $j);
imagesetpixel($this->imageHandle, $left, $j, imagecolorat($this->imageHandle, $right, $j));
imagesetpixel($this->imageHandle, $right, $j, $t);
$left++; $right--;
}
}
return true;
}
/**
* Adjust the image gamma
*
* @param float $outputgamma
*
* @return none
*/
function gamma($outputgamma=1.0) {
ImageGammaCorrect($this->imageHandle, 1.0, $outputgamma);
}
/**
* Save the image file
*
* @param $filename string the name of the file to write to
* @param $quality int output DPI, default is 85
* @param $types string define the output format, default
* is the current used format
*
* @return none
*/
function save($filename, $type = '', $quality = 85)
{
$type = $type==''? $this->type : $type;
$functionName = 'image' . $type;
if(function_exists($functionName))
{
$this->old_image = $this->imageHandle;
if($type=='jpeg')
$functionName($this->imageHandle, $filename, $quality);
else
$functionName($this->imageHandle, $filename);
$this->imageHandle = $this->old_image;
$this->resized = false;
}
} // End save
/**
* Display image without saving and lose changes
*
* @param string type (JPG,PNG...);
* @param int quality 75
*
* @return none
*/
function display($type = '', $quality = 75)
{
if ($type != '') {
$this->type = $type;
}
$functionName = 'Image' . $this->type;
if(function_exists($functionName))
{
header('Content-type: image/' . strtolower($this->type));
$functionName($this->imageHandle, '', $quality);
$this->imageHandle = $this->old_image;
$this->resized = false;
ImageDestroy($this->old_image);
$this->free();
}
}
/**
* Destroy image handle
*
* @return none
*/
function free()
{
if ($this->imageHandle){
ImageDestroy($this->imageHandle);
}
}
} // End class ImageGD
?>

Documentation generated on Mon, 05 May 2008 16:19:59 +0400 by phpDocumentor 1.4.0

Source for file GD.php