errmsg = "File doesn't exists";
$this->error = true;
}
else if (!is_readable($file)) {
$this->errmsg = "File is not readable";
$this->error = true;
}
if (strstr(strtolower($file), ".gif")) {
$this->format = "GIF";
}
else if (strstr(strtolower($file), ".jpg") ||
strstr(strtolower($file), ".jpeg")) {
$this->format = "JPEG";
}
else if (strstr(strtolower($file), ".png")) {
$this->format = "PNG";
}
else {
$this->errmsg = "Unknown file format";
$this->error = true;
}
if ($max_width == 0 && $max_height == 0 && $percent == 0) {
$percent = 100;
}
$this->max_width = $max_width;
$this->max_height = $max_height;
$this->percent = $percent;
$this->file = $file;
$this->jpeg_quality = $jpeg_quality;
}
function calc_width($width, $height) {
$new_width = $this->max_width;
$new_wp = (100 * $new_width) / $width;
$new_height = ($height * $new_wp) / 100;
return array($new_width, $new_height);
}
function calc_height($width, $height) {
$new_height = $this->max_height;
$new_hp = (100 * $new_height) / $height;
$new_width = ($width * $new_hp) / 100;
return array($new_width, $new_height);
}
function calc_percent($width, $height) {
$new_width = ($width * $this->percent) / 100;
$new_height = ($height * $this->percent) / 100;
return array($new_width, $new_height);
}
function return_value($array) {
$array[0] = intval($array[0]);
$array[1] = intval($array[1]);
return $array;
}
function calc_image_size($width, $height) {
$new_size = array($width, $height);
if ($this->max_width > 0 && $width > $this->max_width) {
$new_size = $this->calc_width($width, $height);
if ($this->max_height > 0 && $new_size[1] > $this->max_height) {
$new_size = $this->calc_height($new_size[0], $new_size[1]);
}
return $this->return_value($new_size);
}
if ($this->max_height > 0 && $height > $this->max_height) {
$new_size = $this->calc_height($width, $height);
return $this->return_value($new_size);
}
if ($this->percent > 0) {
$new_size = $this->calc_percent($width, $height);
return $this->return_value($new_size);
}
return $this->return_value($new_size);
}
function show_error_image() {
// header("Content-type: image/png");
$err_img = ImageCreate(220, 25);
$bg_color = ImageColorAllocate($err_img, 0, 0, 0);
$fg_color1 = ImageColorAllocate($err_img, 255, 255, 255);
$fg_color2 = ImageColorAllocate($err_img, 255, 0, 0);
ImageString($err_img, 3, 6, 6, "ERROR:", $fg_color2);
ImageString($err_img, 3, 55, 6, $this->errmsg, $fg_color1);
ImagePng($err_img);
ImageDestroy($err_img);
}
function show($name = "") {
if ($this->error) {
$this->show_error_image();
return;
}
$size = GetImageSize($this->file);
$new_size = $this->calc_image_size($size[0], $size[1]);
#
# Good idea from Mariano Cano P�rez
# Requires GD 2.0.1 (PHP >= 4.0.6)
#
if (function_exists("ImageCreateTrueColor")) {
$new_image = ImageCreateTrueColor($new_size[0], $new_size[1]);
}
else {
$new_image = ImageCreate($new_size[0], $new_size[1]);
}
switch ($this->format) {
case "GIF":
$old_image = ImageCreateFromGif($this->file);
break;
case "JPEG":
$old_image = ImageCreateFromJpeg($this->file);
break;
case "PNG":
$old_image = ImageCreateFromPng($this->file);
break;
}
#
# Good idea from Michael Wald
# Requires GD 2.0.1 (PHP >= 4.0.6)
#
if (function_exists("ImageCopyResampled")) {
ImageCopyResampled($new_image, $old_image, 0, 0, 0, 0, $new_size[0], $new_size[1], $size[0], $size[1]);
}
else {
ImageCopyResized($new_image, $old_image, 0, 0, 0, 0, $new_size[0], $new_size[1], $size[0], $size[1]);
}
switch ($this->format) {
case "GIF":
if (!empty($name)) {
ImageGif($new_image, $name);
}
else {
header("Content-type: image/gif");
ImageGif($new_image);
}
break;
case "JPEG":
if (!empty($name)) {
ImageJpeg($new_image, $name, $this->jpeg_quality);
}
else {
header("Content-type: image/jpeg");
ImageJpeg($new_image, "", $this->jpeg_quality);
}
break;
case "PNG":
if (!empty($name)) {
ImagePng($new_image, $name);
}
else {
header("Content-type: image/png");
ImagePng($new_image);
}
break;
}
ImageDestroy($new_image);
ImageDestroy($old_image);
return;
}
function save($name) {
$this->show($name);
}
}
?>
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