|
użytkowników online: 16
|
OPINIE UŻYTKOWNIKÓW
|
Przyznam, że jestem pod sporym wrażeniem. Od wielu lat zajmuje się grafiką przeznaczoną do druku ze szczególnym uwzględnieniem opakowań. Z radością stwierdzam, iż twórca serwisu jest moim ulubionym typem potencjalnego współpracownika (choć branża troszeczkę inna) tzn. pada pytanie i błyskawicznie pada konkretna odpowiedź bez względu na stopień skomplikowania pytania. Gorąco polecam współpracę, gdyż macie pewność że nie zostaniecie potraktowani sloganami typu "oczywiście", "nie ma sprawy" tylko otrzymacie konkretną pomoc. Tak trzymać! Na pewno jeszcze nie raz skorzystam
Paweł
Studio Gama
|
|
PODRĘCZNIK PHP 5.x, 4.x, 3.x - częściowo spolszczony / źródło: www.php.net
[Spis]
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]
[I]
[J]
[K]
[L]
[M]
[N]
[O]
[P]
[Q]
[R]
[S]
[T]
[U]
[V]
[X]
[W]
[Z]
LII. Image Functions
PHP is not limited to creating just HTML output. It can also be
used to create and manipulate image files in a variety of different
image formats, including gif, png, jpg, wbmp, and xpm. Even more
convenient, PHP can output image streams directly to a browser. You
will need to compile PHP with the GD library of image functions for
this to work. GD and PHP may also require other libraries, depending
on which image formats you want to work with.
You can use the image functions in PHP to get the size of
JPEG, GIF,
PNG, SWF,
TIFF and JPEG2000 images.
Notatka:
Read requirements section about how to expand image capabilities
to read, write and modify images and to read meta data of pictures
taken by digital cameras.
If you have the GD library (available at http://www.boutell.com/gd/) you will also be able to create
and manipulate images.
The format of images you are able to manipulate depend on the
version of GD you install, and any other libraries
GD might need to access those image formats.
Versions of GD older than gd-1.6
support GIF format images, and do not support PNG, where versions
greater than gd-1.6 and less than gd-2.0.28 support PNG, not GIF. GIF
support was re-enabled in gd-2.0.28.
Notatka:
Since PHP 4.3 there is a bundled version of the GD lib. This bundled
version has some additional features like alpha blending, and should
be used in preference to the external library
since its codebase is better maintained and more stable.
You may wish to enhance GD to handle more image formats.
Tabela 1. Supported image formats
You may wish to enhance GD to deal with different fonts. The following
font libraries are supported:
Tabela 2. Supported font libraries
If you have PHP compiled with --enable-exif
you are able to work with information stored in headers of
JPEG and TIFF images. This way you can
read meta data generated by digital cameras as mentioned above. These
functions do not require the GD library.
To enable GD-support configure PHP
--with-gd[=DIR], where DIR is the GD base
install directory. To use the recommended bundled version of the GD library
(which was first bundled in PHP 4.3.0), use the configure option
--with-gd.
GD library requires libpng and
libjpeg to compile.
In Windows, you'll include the GD2 DLL php_gd2.dll as
an extension in php.ini. The GD1 DLL php_gd.dll was
removed in PHP 4.3.2. Also note that the preferred truecolor image
functions, such as imagecreatetruecolor(), require GD2.
Notatka:
To enable exif support in Windows, php_mbstring.dll must be loaded prior
to php_exif.dll in php.ini.
To disable GD support in PHP 3 add
--without-gd to your configure line.
Enhance the capabilities of GD to handle more image formats by specifying
the --with-XXXX configure switch to your PHP configure
line.
Tabela 3. Supported image formats | Image Format | Configure Switch |
|---|
| jpeg-6b |
To enable support for jpeg-6b add
--with-jpeg-dir=DIR.
| | png |
To enable support for png add
--with-png-dir=DIR. Note, libpng
requires the zlib library,
therefore add --with-zlib-dir[=DIR]
to your configure line.
| | xpm |
To enable support for xpm add
--with-xpm-dir=DIR. If configure
is not able to find the required libraries, you may add the path to
your X11 libraries.
|
Notatka:
When compiling PHP with libpng, you must use the same version that was
linked with the GD library.
Enhance the capabilities of GD to deal with different fonts by specifying
the --with-XXXX configure switch to your PHP configure
line.
Tabela 4. Supported font libraries | Font library | Configure Switch |
|---|
| FreeType 1.x |
To enable support for FreeType 1.x add
--with-ttf[=DIR].
| | FreeType 2 |
To enable support for FreeType 2 add
--with-freetype-dir=DIR.
| | T1lib |
To enable support for T1lib (Type 1 fonts) add
--with-t1lib[=DIR].
| | Native TrueType string function |
To enable support for native TrueType string function add
--enable-gd-native-ttf.
|
There are no image specific configurations but you may be interested in the
exif extension directives.
To rozszerzenie nie posiada żadnych rodzajów zasobów.
Poniższe stałe są zdefiniowane w tym rozszerzeniu i stają się dostępne, gdy
rozszerzenie jest dokompilowane do PHP, lub załadowane dynamicznie przy starcie.
Przykład 1. PNG creation with PHP |
<?php
header("Content-type: image/png");
$string = $_GET['text'];
$im = imagecreatefrompng("images/button1.png");
$orange = imagecolorallocate($im, 220, 210, 60);
$px = (imagesx($im) - 7.5 * strlen($string)) / 2;
imagestring($im, 3, $px, 9, $string, $orange);
imagepng($im);
imagedestroy($im);
?>
|
|
This example would be called from a page with a tag like: <img
src="button.php?text=text">. The above button.php script
then takes this "text" string and overlays it on top of a
base image which in this case is "images/button1.png"
and outputs the resulting image. This is a very convenient way to
avoid having to draw new button images every time you want to
change the text of a button. With this method they are
dynamically generated.
User Contributed Notesjab
24-Jan-2006 03:02
If you are developing on/for a Windows platform, read this and you might save yourself some time.
The output using 'imagejpeg' and 'imagepng' (other file formats might also be affected) produce LARGE file sizes even if you use 'imagetruecolortopalette' to reduce the number of colors. During tests, image files sizes were 3 to 4 times larger when generated on a Windows platform than on Linux. (PHP Version 4.4.0).
Sample JPEG test result:
Original image size: 11.68 KB
Output image size on Linux platform: 8.06 KB
Output image size on Windows platform: 27.51 KB
I strongly recommend that you do NOT use these functions if your server run on a Windows platform and you want to generate multiple images "on-the-fly" for a web site.
<?php
function test_png($file)
{
$image = imagecreatefrompng($file);
imagetruecolortopalette($image, true, 256);
header("Content-type: image/png");
imagepng($image);
}
function test_jpeg($file)
{
$image = imagecreatefromjpeg($file);
imagetruecolortopalette($image, true, 256);
header("Content-type: image/jpeg");
imagejpeg($image, "", 60);
}
?>
jan at anh dot sk
15-Jan-2006 01:03
When outputing an image from a script to a browser, use header("Content-Length: XYZ") together with Content-Type header. This avoids problems rendering-displaying the image with some browsers (f.i. MSIE) - fixes random image cutting of image bottom parts. Image from cache example:
<?php
$cache_file = "imagecache/{$ID}.img";
header("Content-Type: image/jpeg");
header("Content-Length: ".filesize($cache_file));
$cache = fopen($cache_file,"r");
fpassthru($cache);
fclose($cache);
exit;
?>
Problem observed @ Linux, Apache 2.0, PHP 4.3.10
matrixhasu at gmail dot com
14-Jan-2006 12:44
Sorry,
a little bug found in the previous note: what was
<?php
for ($i=0; $i<count($Values); $i++){
$graphValues[$i] =
($Values[$i] - $min*(1-2*$graphspacing)) *
(($imgHeight*(1-$graphspacing))/($max-$min));
}
?>
now has to be
<?php
for ($i=0; $i<count($Values); $i++){
$graphValues[$i] =
($Values[$i] - $min*(1-2*$graphspacing)) *
(($imgHeight*(1-$graphspacing))/($max-$min*(1-2*$graphspacing)));
?>
matrixhasu at gmail dot com
14-Jan-2006 01:02
I've take the example of Peter Hulstaert and modified so:
1. grid width is scaled basing on the number of data points to print;
2. images are scaled by min and max values:
even if min is 1000, that point will be very close to the image bottom
Hope this will helpfull to someone.
<?
header("Content-type: image/png");
$Values=array(120,190,130,155,150,140,320,150,140,186,240,128,650);
$imgWidth=500;
$imgHeight=200;
$grid=25;
$graphspacing=0.07;
$gridW=$imgWidth/(count($Values)-1);
for ($i=0; $i<count($Values); $i++){
if ($Values[$i]>$max){$max=$Values[$i];}
}
$min = $max;
for ($i=0; $i<count($Values); $i++){
if ($Values[$i]<$min){$min=$Values[$i];}
}
for ($i=0; $i<count($Values); $i++){
$graphValues[$i] =
($Values[$i] - $min*(1-2*$graphspacing)) *
(($imgHeight*(1-$graphspacing))/($max-$min));
}
$image=imagecreate($imgWidth, $imgHeight);
$colorWhite=imagecolorallocate($image, 255, 255, 255);
$colorGrey=imagecolorallocate($image, 192, 192, 192);
$colorBlue=imagecolorallocate($image, 0, 0, 255);
imageline($image, 0, 0, 0, $imgHeight, $colorGrey);
imageline($image, 0, 0, $imgWidth, 0, $colorGrey);
imageline($image, $imgWidth-1, 0, $imgWidth-1, $imgHeight-1, $colorGrey);
imageline($image, 0, $imgHeight-1, $imgWidth-1, $imgHeight-1, $colorGrey);
for ($i=1; $i<($imgWidth/$gridW); $i++)
{imageline($image, $i*$gridW, 0, $i*$gridW, $imgHeight, $colorGrey);}
for ($i=1; $i<($imgHeight/$grid); $i++)
{imageline($image, 0, $i*$grid, $imgWidth, $i*$grid, $colorGrey);}
for ($i=0; $i<count($graphValues)-1; $i++)
{imageline($image, $i*$gridW, ($imgHeight-$graphValues[$i]),
($i+1)*$gridW, ($imgHeight-$graphValues[$i+1]), $colorBlue);}
imagepng($image);
imagedestroy($image);
?>
peter dot hulstaert at gmail dot com
06-Jan-2006 02:18
While I was searching for a good way to draw a graph, I stumbled on skumar2k15's script.
I have taken the liberty to improve multiple aspects of it.
1. The array can grow and shrink in size, the graph will adjust accordingly.
2. All the values in the array are recalculated so they won't get bigger than the height of the graph.
3. I inserted the possibility to keep a percentage off the height away from the edge.
4. You can adjust the size of the grid.
5. Everything will adjust when you change the height of width.
<?
header("Content-type: image/png");
$Values=array(50,90,30,155,50,40,320,50,40,86,240,128,650,540,320);
$imgWidth=500;
$imgHeight=200;
$grid=25;
$graphspacing=0.05;
while (list($key, $val) = each($Values))
{if($val>$max){$max=$val;}}
for ($i=0; $i<count($Values); $i++){
$graphValues[$i] = $Values[$i] * (($imgHeight*(1-$graphspacing))/$max);
}
$image=imagecreate($imgWidth, $imgHeight);
$colorWhite=imagecolorallocate($image, 255, 255, 255);
$colorGrey=imagecolorallocate($image, 192, 192, 192);
$colorBlue=imagecolorallocate($image, 0, 0, 255);
imageline($image, 0, 0, 0, $imgHeight, $colorGrey);
imageline($image, 0, 0, $imgWidth, 0, $colorGrey);
imageline($image, $imgWidth-1, 0, $imgWidth-1, $imgHeight-1, $colorGrey);
imageline($image, 0, $imgHeight-1, $imgWidth-1, $imgHeight-1, $colorGrey);
for ($i=1; $i<($imgWidth/$grid); $i++)
{imageline($image, $i*$grid, 0, $i*$grid, $imgHeight, $colorGrey);}
for ($i=1; $i<($imgHeight/$grid); $i++)
{imageline($image, 0, $i*$grid, $imgWidth, $i*$grid, $colorGrey);}
if($imgWidth/$grid>count($graphValues)){$space=$grid;}
else{$space = $imgWidth/(count($graphValues)-1);}
for ($i=0; $i<count($graphValues)-1; $i++)
{imageline($image, $i*$space, ($imgHeight-$graphValues[$i]), ($i+1)*$space, ($imgHeight-$graphValues[$i+1]), $colorBlue);}
imagepng($image);
imagedestroy($image);
?>
razonklnbd at yahoo dot com
26-Dec-2005 08:12
I was looking for a function to get propotional image size. After a bit of thinking I came up with this pretty fast solution:
<?php
function getPropotionalSize($src_w, $src_h, $max_w, $max_h){
$return_val['width']=$src_w;
$return_val['height']=$src_h;
if($max_w<$src_w || $max_h<$src_h){
$return_val['width']=$max_w;
$return_val['height']=$max_h;
if($src_w>=$src_h) $return_val['height']=($max_w*$src_h)/$src_w;
else $return_val['width']=($max_h*$src_w)/$src_h;
}
return $return_val;
}
?>
Hope it saved somebody some time!
orbitphreak at yahoo dot com
06-Dec-2005 06:46
If you want to have a dynamic image validation code
like yahoo, you can use this function:
<?php
function generateValidationImage($rand) {
global $site_font_path;
global $site_font_validation;
$width = 120;
$height = 40;
$image = imagecreate($width, $height);
$bgColor = imagecolorallocate ($image, 255, 255, 255);
$textColor = imagecolorallocate ($image, 0, 0, 0);
for ($i = 0; $i < 250; $i++) {
$rx1 = rand(0,$width);
$rx2 = rand(0,$width);
$ry1 = rand(0,$height);
$ry2 = rand(0,$height);
$rcVal = rand(0,255);
$rc1 = imagecolorallocate($image,
rand(0,255),
rand(0,255),
rand(100,255));
imageline ($image, $rx1, $ry1, $rx2, $ry2, $rc1);
}
$font = imageloadfont($site_font_path."/".$site_font_validation);
imagestring($image, $font, 3, 0, $rand, $textColor);
header("Expires: Mon, 23 Jul 1993 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
header('Content-type: image/jpeg');
imagejpeg($image);
imagedestroy($image);
}
?>
The $site_font_path should be set to something like "/home/user/www/fonts".
The $site_font_validation should be set to the name of the GD font file,
like "anonymous.gdf".
You can view and download the code here:
http://www.digital-seven.net/?option=com_content&task=view&id=67
raphael at schwarzschmid dot de
24-Nov-2005 04:46
Jonas Sweden
17-Nov-2005 12:51
Simple script for getting a jpg-thumb by submitting imgname and either height or width of the thumb!
<?php
if(isset($_GET["i"]) && ("" != $_GET["i"])){
$fn = "path/to/jpgs/".$_GET["i"].".jpg";
if(false !== (list($ws,$hs) = @getimagesize($fn))){
if(isset($_GET["w"]) && ("" != $_GET["w"])){
$ratio = ((float)$_GET["w"]) / $ws;
}
elseif(isset($_GET["h"]) && ("" != $_GET["h"])){
$ratio = ((float)$_GET["h"]) / $hs;
}
if(isset($ratio)){
$wt = $ws * $ratio;
$ht = $hs * $ratio;
$thumb = imagecreatetruecolor($wt,$ht);
$source = imagecreatefromjpeg($fn);
imagecopyresampled($thumb,$source,0,0,0,0,$wt,$ht,$ws,$hs);
header('Content-type: image/jpeg');
imagejpeg($thumb);
imagedestroy($thumb);
}
}
}
?>
skumar2k15 [at] gmail [dot] com
07-Nov-2005 11:24
Generate a line graphs on-the-fly through php image functions.
<br>
code for linechart.php
<?
$graphValues=array(0,80,23,11,190,245,50,80,111,240,55);
header("Content-type: image/png");
$imgWidth=250;
$imgHeight=250;
$image=imagecreate($imgWidth, $imgHeight);
$colorWhite=imagecolorallocate($image, 255, 255, 255);
$colorGrey=imagecolorallocate($image, 192, 192, 192);
$colorBlue=imagecolorallocate($image, 0, 0, 255);
imageline($image, 0, 0, 0, 250, $colorGrey);
imageline($image, 0, 0, 250, 0, $colorGrey);
imageline($image, 249, 0, 249, 249, $colorGrey);
imageline($image, 0, 249, 249, 249, $colorGrey);
for ($i=1; $i<11; $i++){
imageline($image, $i*25, 0, $i*25, 250, $colorGrey);
imageline($image, 0, $i*25, 250, $i*25, $colorGrey);
}
for ($i=0; $i<10; $i++){
imageline($image, $i*25, (250-$graphValues[$i]), ($i+1)*25, (250-$graphValues[$i+1]), $colorBlue);
}
imagepng($image);
imagedestroy($image);
?>
Thanks and regards,
skumar k.
michal-ok at o2 dot pl
18-Oct-2005 11:29
The image sharpen function (by Alex R. Austin) provided below seems to be very resource hungry and I couldn't make it work on two different servers - trying to sharpen a 413 x 413 image I ended up with "Fatal error: Allowed memory size of 8388608 bytes exhausted" or "Internal Server Error" or the script terminated without notice. Because I had no priviliges to change the default memory limit on these servers I started looking for other sharpen functions. I have come across a php Unsharp Mask function which works like a charm on both of the servers I dealt with. It can be found at http://vikjavev.no/hovudsida/umtestside.php.
mslemko
09-Oct-2005 09:09
For fedora core 4 users that find that the gd library isn't installed, you can issue the command (as root)
# yum install php-gd
it should download and install the gd library. You will need to restart apache... phpinfo() should then tell you "GD Support enabled".
stephan dot klein at gmx dot at
01-Oct-2005 03:40
I was looking for a function to determine whether a variable is a valid image ressource. After a bit of thinking I came up with this pretty fast solution:
<?php
function is_gd_handle($var) {
ob_start();
imagecolorallocate($var, 255, 255, 255);
$error = ob_get_contents();
ob_end_clean();
if(preg_match('/not a valid Image resource/',$error)) {
return false;
} else {
return true;
}
}
?>
Hope it saved somebody some time!
lasse84 at host dot sk
19-Sep-2005 11:02
I was trying to write my own photogallery, but could't find a simpel and easy-to-use on-the-fly thumbnail creator with cache ability. So I created JustThumb
I don't want to paste the whole file here so here is a link:
http://jack-the-ripper.mine.nu/justThumb/
someone at somewhere dot com dot au
13-Sep-2005 05:40
If you chose to use the PECL_imagick module in your PHP install rather than GD, check the source tarball for the examples directory for documentation. Other docs are very scarce on the net!
lace at gta dot hu
31-Aug-2005 12:10
To get gdlib working on the windows installation of php do this:
(info from: gdlib site: http://www.boutell.com/gd/faq.html)
[..]
php 4.3.x is available, and it includes a version of gd as "standard equipment." php_gd2.dll is included in a standard PHP installation for Windows, it's just not enabled by default. To turn it on, the user may simply uncomment the line "extension=php_gd2.dll" in php.ini and restart the PHP extension. Change:
#extension=php_gd2.dll
To:
extension=php_gd2.dll
You may also have to correct the extension directory setting from:
extension_dir = "./"
Or:
extension_dir = "./extensions"
To (FOR WINDOWS):
extension_dir = "c:/php/extensions" NOTE: SUBSTITUTE THE ACTUAL PHP INSTALLATION DIRECTORY ON *YOUR* COMPUTER.
Thanks to Benoit Blais for this last point. Thanks also to Alan MacDougall and Perculator.
[..]
trucex at gmail
28-Aug-2005 01:18
@snagnever|gmail|com:
I modified the ascii image script you wrote so that it displays an image that looks real. While impractical due to speed, the concept is actually really cool. Here it is:
<?php
$name = basename($_GET['name']);
$file = "/path/to/images/" . $name;
if( file_exists($file) ) {
$what = getimagesize($file);
switch( $what['mime'] ){
case 'image/png' : $src_id = imagecreatefrompng($file); break;
case 'image/jpeg': $src_id = imagecreatefromjpeg($file); break;
case 'image/gif' : $old_id = imagecreatefromgif($file); $src_id = imagecreatetruecolor($what[0],$what[1]); imagecopy($src_id,$old_id,0,0,0,0,$what[0],$what[1]); break;
default: break;
}
}
else die("No such file");
if( $src_id ){
$x_size = imagesx($src_id);
$y_size = imagesy($src_id);
$x_jump = $y_jump = 3;
$pixel_char = array(0);
echo "The image is $x_size x $y_size\n";
echo "<span style='font-size:8px; font-weight:bold;'><style>td.a { width:1px; height:1px; }</style>";
echo "<table margin=0 cellspacing=0 cellpadding=0><tr>";
for( $y = 0; $y < $y_size; $y+=$y_jump ){
for( $x = 0; $x < $x_size; $x+=$x_jump ){
if( $x >= $x_size || $y >= $y_size ) break;
$rgb = @imagecolorat($src_id, $x, $y);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;
if( $x >= $x_size ) break;
if( $y >= $y_size ) break;
$pc = rand(0,count($pixel_char)-1);
$pc = $pixel_char[$pc];
echo "<td class=a style='background-color:rgb($r,$g,$b)'></td>";
} echo "</tr><tr>\r\n"; } }
?>
timeshifting at gmail dot com
25-Aug-2005 12:39
To sharpen an image, rather than using the code below that produces a sharpening filter with php, use the built-in GD function "imageconvolution" which is designed for this purpose. Matrices can be used for sharpening, blurring, edge detection, etc, ala Photoshop.
A sharpening example:
<?php
$sharpenMatrix = array(-1,-1,-1,-1,16,-1,-1,-1,-1);
$divisor = 8;
$offset = 0;
imageconvolution($myImage, $sharpenMatrix, $divisor, $offset);
?>
Below is some information on building different kinds of matrices. (If you have photoshop (or PSP, GIMP) you can test out your matrices before applying them in PHP)
http://loriweb.pair.com/8udf-basics.html (covers blurs)
http://loriweb.pair.com/8udf-sharpen.html
http://loriweb.pair.com/8udf-edges.html
http://loriweb.pair.com/8udf-emboss.html
tfl at netcabo dot pt
19-Aug-2005 12:48
IE doesn't show TIFF files and standard PHP distribution doesn't support converting to/from TIFF.
ImageMagick (http://www.imagemagick.org/script/index.php) is a free software that can read, convert and write images in a large variety of formats. For Windows users it includes a PHP extension php_magickwand_st.dll (and yes, it runs under PHP 5.0.4).
When converting from TIFF to JPEG, you must also convert from CMYK color space to RGB color space as IE can't show CMYK JPGs either. Please note:
-TIFF files may have RGB or CMYK color space
-JPEG files may have RGB or CMYK color space
Here are example functions using ImageMagick extension:
- convert TIFF to JPEG file formats
- convert CMIK to RGB color space
- set image resolution to 300 DPIs (doesn't change image size in pixels)
<?php
function cmyk2rgb($file) {
$mgck_wnd = NewMagickWand();
MagickReadImage($mgck_wnd, $file);
$img_colspc = MagickGetImageColorspace($mgck_wnd);
if ($img_colspc == MW_CMYKColorspace) {
echo "$file was in CMYK format<br />";
MagickSetImageColorspace($mgck_wnd, MW_RGBColorspace);
}
MagickWriteImage($mgck_wnd, str_replace('.', '-rgb.', $file));
}
function tiff2jpg($file) {
$mgck_wnd = NewMagickWand();
MagickReadImage($mgck_wnd, $file);
$img_colspc = MagickGetImageColorspace($mgck_wnd);
if ($img_colspc == MW_CMYKColorspace) {
echo "$file was in CMYK format<br />";
MagickSetImageColorspace($mgck_wnd, MW_RGBColorspace);
}
MagickSetImageFormat($mgck_wnd, 'JPG' );
MagickWriteImage($mgck_wnd, str_replace('.tif', '.jpg', $file));
}
function to300dpi($file) {
$mgck_wnd = NewMagickWand();
MagickReadImage($mgck_wnd, $file);
$img_units = MagickGetImageUnits($mgck_wnd);
switch ($img_units) {
case MW_UndefinedResolution: $units= 'undefined'; break;
case MW_PixelsPerInchResolution: $units= 'PPI'; break;
case MW_PixelsPerCentimeterResolution: $units= 'PPcm'; break;
}
list($x_res, $y_res) = MagickGetImageResolution($mgck_wnd);
echo "$file<br /> x_res=$x_res $units - y_res=$y_res $units<br />";
if($x_res == 300 && $y_res == 300 && $img_units == MW_PixelsPerInchResolution) {return; }
MagickSetImageResolution($mgck_wnd, 300 , 300);
MagickSetImageUnits($mgck_wnd, MW_PixelsPerInchResolution);
MagickWriteImage($mgck_wnd, str_replace('.', '-300.', $file));
}
$file='photos/test-cmyk.tif';
cmyk2rgb($file);
$file = str_replace('.', '-rgb.', $file);
to300dpi($file);
$file = str_replace('.', '-300.', $file);
tiff2jpg($file);
$file = str_replace('.tif', '.jpg', $file);
to300dpi($file);
list($width, $height, $type, $attr) = getimagesize($file);
$width = $width/3;
$height = $height/3;
echo "<img src=\"http://localhost/$file\" width=\"$width\" height=\"$height\" alt=\"getimagesize() example\" />";
echo "<br />$file => width=$width - height=$height - type=$type - attr=$attr<br /><br />";
$file='photos/test-rgb.tif';
cmyk2rgb($file);
$file = str_replace('.', '-rgb.', $file);
to300dpi($file);
$file = str_replace('.', '-300.', $file);
tiff2jpg($file);
$file = str_replace('.tif', '.jpg', $file);
to300dpi($file);
list($width, $height, $type, $attr) = getimagesize($file);
$width = $width/3;
$height = $height/3;
echo "<img src=\"http://localhost/$file\" width=\"$width\" height=\"$height\" alt=\"getimagesize() example\" />";
echo "<br />$file => width=$width - height=$height - type=$type - attr=$attr<br /><br />";
?>
Note - Although ImageMagick correctly sets JPEG files resolution to 300 DPIs, some programs might not notice it.
Mark Rosenthal <mbr at arlsoft dot com>
14-Aug-2005 08:48
In AmX's example of how to generate headers to prevent the browser
from trying to cache a script-generated image, he wrote: "I did not
yet find a way to get the filesize of a GD made image, so I assume you
save it to disk, get the filesize and read it again."
That's not necessary. Here's AmX's example, reworked to output the
correct "Content-Length: " header without the intermediate step of
storing the image in a file:
// The following code assumes that $gd has been set to the GD
// resource of the image we want to output.
// Turn on output buffering
ob_start();
// Output will now go to a buffer rather than the browser.
imagejpeg($gd);
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
header("Content-type: image/jpeg");
// Tell the browser the number of bytes that have been
// written to the buffer.
header("Content-Length: " . ob_get_length());
// Now send the buffer's contents to the browser and turn off
// output buffering.
ob_end_flush();
// Remember to free the memory used by the GD resource, or the
// sever will eventually crash.
imagedestroy($gd);
// Headers and image data have been sent. We're done.
exit;
Maarten Balliauw
03-Aug-2005 04:45
A PHP "skew" function:
<?
$angle = 15;
$pDirection = 1;
header("Content-Type: image/png");
imagepng(ImageSkew("test.png", $angle, 1));
exit();
function ImageSkew($pImage, $pAngle, $pDirection = 0) {
$iSource = ImageCreateFromPng("test.png");
list($width, $height, $type, $attr) = getimagesize($pImage);
$iCanvas = @imagecreate($width, $height);
$cCyan = imagecolorallocate($iCanvas, 255, 0, 255);
imagefill($iCanvas, 0, 0, $cCyan);
$diff = ($pAngle / 90);
$currentHeight = $height;
$currentY = 0;
if ($pDirection == 1) {
$currentHeight = 0;
$currentY = $height;
}
for ($i = 0; $i < $width; $i++) {
if ($pDirection == 0) {
imagecopyresampled($iCanvas, $iSource, $i, $currentY, $i, 0, 1, $currentHeight, 1, $height);
} else {
imagecopyresampled($iCanvas, $iSource, ($width - $i), $currentY, ($width - $i), 0, 1, $currentHeight, 1, $height);
}
if ($pDirection == 0) {
$currentHeight = $currentHeight - ($diff * 2);
$currentY = ($height - $currentHeight) / 2;
} else {
$currentHeight = $height - ( $i * ($diff * 2) );
$currentY = ($height - $currentHeight) / 2;
}
}
return $iCanvas;
}
?>
yasin yyalcinkaya at ku dot edu dot tr
29-Jul-2005 04:01
firstly , i wrote this class. we can easily call it from anywhere. Soppose , its name is "imageuploader.class.php" and our main file's name is upload.php.
<?php
class Imenu
{
function Ifonc() {
echo "<table class=\"adminform\">"
."<form method=\"post\" action=\"upload.php\" enctype=\"multipart/form-data\" name=\"filename\">"
."<tr><th class=\"title\"> File Upload : $directory </th>"
."</tr><tr><td align=\"center\"><input class=\"inputbox\" name=\"userfile\" type=\"file\" />"
."</td></tr><tr><td>"
."<input class=\"button\" type=\"submit\" value=\"Upload\" name=\"fileupload\" />"
."</td><tr><td>"
."<input type=\"hidden\" name=\"directory\" value=\"$directory\" />"
."</td></tr></form>"
."</table>";
return true;
}
}
?>
then we use this part in our main function.
<?php
....
....
....
$userfile2=(isset($_FILES['userfile']['tmp_name']) ? $_FILES['userfile']['tmp_name'] : "");
$userfile_name=(isset($_FILES['userfile']['name']) ? $_FILES['userfile']['name'] : "");
if (isset($_FILES['userfile'])) {
if ($directory!="banners") {
$base_Dir = "images/";
} else {
$base_Dir = "images/";
}
if (empty($userfile_name)) {
echo "<script>alert('Please select an image to upload'); document.location.href='upload.php';</script>";
}
$filename = split("\.", $userfile_name);
if (eregi("[^0-9a-zA-Z_]", $filename[0])) {
echo "<script> alert('File must only contain alphanumeric characters and no spaces please.');</script>\n";
}
if (file_exists($base_Dir.$userfile_name)) {
echo "<script> alert('Image $userfile_name already exists.');</script>\n";
}
if ((strcasecmp(substr($userfile_name,-4),".gif")) && (strcasecmp(substr($userfile_name,-4),".jpg"))
&& (strcasecmp(substr($userfile_name,-4),".png")) && (strcasecmp(substr($userfile_name,-4),".bmp"))
&& (strcasecmp(substr($userfile_name,-4),".doc")) && (strcasecmp(substr($userfile_name,-4),".xls"))
&& (strcasecmp(substr($userfile_name,-4),".ppt")) && (strcasecmp(substr($userfile_name,-4),".swf"))
&& (strcasecmp(substr($userfile_name,-4),".pdf"))) {
echo "<script>alert('The file must be gif, png, jpg, bmp, swf, doc, xls or ppt');</script>\n";
}
if (eregi(".pdf", $userfile_name) || eregi(".doc", $userfile_name) || eregi(".xls", $userfile_name)
|| eregi(".ppt", $userfile_name)) {
if (!move_uploaded_file ($_FILES['userfile']['tmp_name']
,$media_path.$_FILES['userfile']['name'])
|| !chmod($media_path.$_FILES['userfile']['name'],0777)) {
echo "<script>alert('Upload of $userfile_name failed');</script>\n";
}
else {
echo "<script>alert('Upload of $userfile_name to $media_path successful');</script>\n";
}
} elseif (!move_uploaded_file ($_FILES['userfile']['tmp_name']
,$base_Dir.$_FILES['userfile']['name'])
|| !chmod($base_Dir.$_FILES['userfile']['name'],0777)) {
echo "<script>alert('Upload of $userfile_name failed'); </script>\n";
}
else {
echo "<script>alert('Upload of $userfile_name to $base_Dir successful'); </script>\n";
}
}
include_once "imageuploader.class.php";
$Imenu = new Imenu;
$Imenu ->Ifonc();
....
....
....
?>
with script we can upload our files.
yasin yyalcinkaya at ku dot edu dot tr
29-Jul-2005 03:43
firstly , i wrote this class. we can easily call it from anywhere. Soppose , its name is "imageuploader.class.php" and our main file's name is upload.php.
<?php
class Imenu
{
function Ifonc() {
echo "<table class=\"adminform\">"
."<form method=\"post\" action=\"upload.php\" enctype=\"multipart/form-data\" name=\"filename\">"
."<tr><th class=\"title\"> File Upload : $directory </th>"
."</tr><tr><td align=\"center\"><input class=\"inputbox\" name=\"userfile\" type=\"file\" />"
."</td></tr><tr><td>"
."<input class=\"button\" type=\"submit\" value=\"Upload\" name=\"fileupload\" />"
."</td><tr><td>"
."<input type=\"hidden\" name=\"directory\" value=\"$directory\" />"
."</td></tr></form>"
."</table>";
return true;
}
}
?>
grzegorz at Mouton dot pl
19-Jul-2005 11:05
how to get a jpg quality from file?
AmX
05-Jul-2005 12:03
As many people found any PhP made image working standalone but not in an img tag, I 'll explain how I solved it.
//Part1
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
//Part2
header('Content-Length: '.filesize($pic));
header('Content-type: image/jpeg');
readfile($pic);
Just some header work, the first part makes the image non-cacheable and the second one ensures the browser gets all the needed information.
As I did not need it I did not yet find a way to get the filesize of a GD made image, so I assume you save it to disk, get the filesize and read it again.
I hope I just helped you out, and saved you from 2 hours of finding out why the stupid PhP has to add data at the beginning of your image. It may look trivial, the Content-Length is not given by default!
AmX
http://mike.eire.ca
30-Jun-2005 09:13
ceo at l-i-e dot com:
II AND MM are referring to Intel and Motorola byte order within the TIFF image. If, for example, you save a TIFF in Photoshop you are given the option of 'PC' or 'Macintosh': this determines what byte order will be used to store the image. If you don't already know about byte order, you probably don't want to!
alex at bestgames dot ro
30-Jun-2005 07:04
This function helps you to create a simple statistic graphics.
Arguments
$values, values should be separed by comma
$options may be separed by comma options can be timeline=format, title=a string or image=a source, where format can be sec, min, hour, days/number, days/name, months/number, months/name or years.
$x, $y reffers to upper left corner where the graphic should begin
$image is the image resource
$graphic_color, $highlight_color, $grid_color are colors strings
Hope it will be useful!
Example of function:
function image_create_grid("1,2,3,4,5", "title=A simple graphic,timeline=months/name", 0, 0, $image, "navy, "green", "gray")
The source can be accessed at http://www.bestgames.ro/source/statistics.txt, it was too long to bve posted here.
marc dot van dot nuffel at dudagroup dot com
05-Jun-2005 02:11
Adalius
04-Jun-2005 10:48
After being driven batty for a good day and a half at why *any* of the image output functions were giving me the infamous 'The image
|
