09. januar 2004 - 15:39
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11 kommentarer og
1 løsning
resing et billede med imagecopyresized
Hej.
Jeg skal bruge et php script, som tager et billede, og kopier det, og ligger det ind i mappen "billeder/small/" hvor at billedet selvfølgelig skal være blevet mindre. Billedet skal være 77 * 103
Jeg vil godt have det til at blive gjordt med imagecopyresized, hvis det er muligt!
p.s. Jeg er newbie, så jeg er nød til at have et HELT script, som jeg bare skal kopier og gemme.
p.p.s Det er ikke min egen server, så jeg kan ikke installere noget på den.
Mange tak..
Mvh
Anders
09. januar 2004 - 15:46
#2
<?php
# Classes by Thomas Daugaard 24/01-2002.
# Set script time limit to 120 seconds.
set_time_limit(120);
/*
Class : imageresize
Purpose : Re- size/sample an image (JPG or PNG)
Variables :
new_width - New width
new_height - New height
resize_ax - If 1 = auto. adjust is done to height, 2 = .. to width.
maintain_aspect - If true, image resizing will maintain aspect ratio of image.
If true, only new_width or new_height should be set.
Whichever is set last is effective.
output - Output filename. If emtpy "" output will be to stdout.
jpeg_quality - Quality of JPEG image
Functions :
bool source(string image_file)
Loads image_file as the active source image
bool resize()
Performs a pixel resize on the source image
bool resample()
Performs a resample on the source image
All returns true on success, otherwise false.
*/
class imageresize {
var $new_width; # Positive value: width in px; Negative: width in % of org. width
var $new_height; # Same as above for height.
var $resize_ax; # 1 = Resize width proportionally to width; 2 = Resize height ...
# if maintain_aspect is true.
# Default: 1
var $maintain_aspect; # Maintain aspect ratio. True/False.
# Default: True
var $output; # Filename to output to. If emtpy, outputs image directly to the browser.
# $output is reset after a call to set_source();
var $jpeg_quality; # Quality of JPEG output (0 - 100).
# Default: 90
var $org_width; # If set_source() was called, and succeeded, returns the original width.
var $org_height; # Same as above for height
# internal variables, not to be altered!
var $i_image;
var $i_src;
var $i_isGD2;
# Main function
function imageresize() {
# Initialize variables with default values
$this->maintain_aspect = 1;
$this->jpeg_quality = 90;
$this->resize_ax = 1;
$this->new_height = 0;
$this->new_width = 0;
$this->org_height = 0;
$this->org_width = 0;
$this->i_src = 0;
$this->i_isGD2 = true;
}
# Returns true/false depending on success.
function source($image_file) {
# if file does not exist, return false
if (!file_exists($image_file)) return false;
# set image as active image
$this->i_image = $image_file;
# load the image set in i_image, and assign image resource to i_src.
if ($this->int_loadimage()) {
$this->org_width = imagesx($this->i_src);
$this->org_height = imagesy($this->i_src);
$this->output = "";
return true;
} else {
# clear image on load failure
$this->i_image = "";
return false;
}
}
# Resample loaded image. (requires GD 2.0.1 or later)
function resample() {
if (!$this->i_image) return false;
# get the resource to the destination image
if ($dest = $this->int_get_destimage()) {
# copy the image from i_src and resample it, then place it on $dest.
imagecopyresampled($dest, $this->i_src, 0, 0, 0, 0, $this->new_width, $this->new_height, $this->org_width, $this->org_height);
# output the image
$this->int_outputimage($dest);
return true;
} else {
return false;
}
}
# Pixel reesize loaded image. (requires GD 2.0.1 or later)
function resize() {
if (!$this->i_image) return false;
# get the resource to the destination image
if ($dest = $this->int_get_destimage()) {
# copy the image from i_src and resize it, then place it on $dest.
imagecopyresized($dest, $this->i_src, 0, 0, 0, 0, $this->new_width, $this->new_height, $this->org_width, $this->org_height);
# output the image
$this->int_outputimage($dest);
return true;
} else {
return false;
}
}
# Returns image resource on succes, otherwise false.
function int_loadimage() {
if (!$this->i_image) return false;
# determine file type and load image
switch ($this->int_imagetype()) {
case ".jpg": $this->i_src = @imagecreatefromjpeg($this->i_image); break;
case ".png": $this->i_src = @imagecreatefrompng($this->i_image); break;
}
return $this->i_src;
}
# Returns file extension of loaded image
function int_imagetype() {
if (!$this->i_image) return false;
return strtolower(strrchr($this->i_image, "."));
}
# Returns image resource to destination image on success, otherwise false.
function int_get_destimage() {
if ($this->maintain_aspect) {
if ($this->new_width > 0 || $this->new_height > 0) {
if ($this->resize_ax == 1) {
$ratio = ($this->new_width * 100) / $this->org_width;
$this->new_height = floor($this->org_height * ($ratio / 100));
} else if ($this->resize_ax == 2) {
$ratio = ($this->new_height * 100) / $this->org_height;
$this->new_width = floor($this->org_width * ($ratio / 100));
}
} else if ($this->new_width < 0 || $this->new_height < 0) {
if ($this->new_width < 0) {
$width = abs($this->new_width) / 100;
$this->new_width = $this->org_width * $width;
$this->new_height = $this->org_height * $width;
}
if ($this->new_height < 0) {
$height = abs($this->new_height) / 100;
$this->new_height = $this->org_height * $height;
$this->new_width = $this->org_width * $height;
}
}
} else {
if ($this->new_width < 0) $this->new_width = $this->org_width * (abs($this->new_width) / 100);
if ($this->new_height < 0) $this->new_height = $this->org_height * (abs($this->new_height) / 100);
}
$dest = (!$this->i_isGD2) ? @imagecreate($this->new_width, $this->new_height):@imagecreatetruecolor($this->new_width, $this->new_height);
return $dest;
}
# Outputs image from $dest
function int_outputimage($dest) {
# array with Content-Type's
$mimes = array(".jpg" => "image/jpeg", ".png" => "image/png");
# if image should be send directly to stdout, then send the appropriate header
if (!$this->output) header("Content-Type: " . $mimes[$this->int_imagetype()]);
# output the image
switch ($this->int_imagetype()) {
case ".jpg": ($this->output) ? imagejpeg($dest, $this->output, $this->jpeg_quality):imagejpeg($dest, "", $this->jpeg_quality); break;
case ".png": ($this->output) ? imagepng($dest, $this->output):imagepng($dest); break;
}
# clear up resources
imagedestroy($dest);
}
}
/*
Class : imagethumbnail; extends imageresize
Purpose : Generate thumbnails of pictures and save thumnail for later and faster retreival.
Functions :
get_thumbnail(string image, int width, int height[, bool resize_type = 0 [, bool regenerate = false]])
Get the filename of a thumbnail og "image".
Either width or height must be set, but not both. One *has* to be zero.
Whichever is set will have its opposite proportionally adjusted.
i.e.: if width = 100, the thumbnail will be 100 px wide and n px high (adjusted)
If resize_type is 0, pixel resizing will be used, if 1 resampling will be used.
If regenerate is true the thumbnail will be generated even if it already exists.
Returns: filename of thumbnail on success, otherwise false.
*/
class imagethumbnail extends imageresize {
function get_thumbnail($image, $width, $height, $resize_type = 0, $regenerate = false) {
if (!file_exists($image) || ($width > 0 && $height > 0)) return false;
# make thumbnail filename
$thumbnail_file = dirname($image) . "/tmb_" . basename($image);
# if thumbnail does not exists or regenerate is true, then generate the thumbnail
if (!@file_exists($thumbnail_file) || $regenerate) {
# load image
$this->source($image);
# set output filename
$this->output = $thumbnail_file;
if ($width > 0) {
$this->new_width = $width;
} else {
$this->new_height = $height;
}
# re -size/-sample image and save the image
($resize_type == 1) ? $this->resample():$this->resize();
}
# return the filename
return $thumbnail_file;
}
}
?>
16. januar 2004 - 20:04
#8
nej nej.. Det var ikke sådan ment.. Jeg mente, at når man har uploadet det store billede, så skal man så køre det her script, som så danner et nyt billede (det lille billede), og uploader til en bestemt url... Men jeg fatter ikke helt hvordan??
Mvh
Anders
