I have an SVG image which is generated by a wordpress plugin.
I want to convert it to PNG for further actions.
The plugin can do this successfully via JS. The Result is this image:
When I use imagick to convert the SVG to png, I get this as a result:
The SVG code looks like this:
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" data-zoom="11.81102361" height="290" width="210" data-main="1">
<svg y="62" x="17" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve" preserveAspectRatio="none" width="178" height="133"><g><image x="0" y="0" width="178" preserveAspectRatio="none" height="133" xlink:href="[BASE64 IMAGE CODE]"/></g></svg>
</svg>
Full version here: https://pastebin.com/vzn7BP2d
I am using this code for the conversion:
$svg = file_get_contents('front-test.svg');
$im = new Imagick();
$im->setBackgroundColor(new ImagickPixel('transparent'));
$im->setResolution(300, 300); // for 300 DPI example
$im->readImageBlob('<?xml version="1.0" encoding="UTF-8" standalone="no"?>'.$svg);
$im->setImageFormat("png24");
//$im->resizeImage(250, 250, imagick::FILTER_LANCZOS, 1);
$im->writeImage('front-test.png');
$im->clear();
$im->destroy();
Does anyone know why this is happening and how I can solve this?
It is neccessary that the image is positioned correctly on the "canvas" because it is a print template for t-shirts and needs be exact.
The SVG file you have is not really a vector image. It is only a PNG wrapped in a SVG. That makes it trivial to get the image: read the data url that makes up the image, decode it and write the result to a file. No ImageMagick required, only gd.
$svg = simplexml_load_file('front-test.svg');
$data_url = $svg->svg->g->image['xlink:href'];
$encoded = $data_url.explode(',')[1];
$data = base64_decode($encoded);
$im = imagecreatefromstring($data);
imagepng($im, 'front-test.png');
Thanks to fmw42 for giving suggestions about different renderers. After some research for this issue, I found that even imagemagick recommends to use another renderer and closed this issue with won't fix:
We recommend the libRSVG delegate library or inkscape delegate program as the preferred SVG renderer. The internal renderer is less robust and likely will never support all of the SVG standard.
Source: https://github.com/ImageMagick/ImageMagick/issues/335
To solve this, I tried different online converters to see, if they also have this problem. Most of them gave me just an empty canvas, others had the same outcome as my 2nd picture in my question.
I stopped searching for converters after I found https://convertio.co/de/
They are able to give me the correct output image. They have an API which can be used for 25 conversion minutes for free daily: https://developers.convertio.co/
This was the only soultion for my case, since I wanted the project to be flexible, since some users may won't be able to install inkscape on their server.
Related
I am trying to create svg image using svg raw data which i am getting from fabric js. I have used below code to generate the svg using svg raw data but its not working properly.
public function generate_svg($raw_svg='',$prefix='',$folder_name='card_image')
{
$file_name = '';
if($raw_svg!='')
{
try{
$file_name = uniqid($prefix).".svg";
$image = new \Imagick();
$image->readImageBlob($raw_svg);
$image->setImageFormat("svg");
$image->writeImage($folder_name.$file_name);
} catch (ImagickException $ex) {
echo $ex->getMessage();
}
}
return $file_name;
}
Now the issue is background image is kind of Look like below:
So what should i do to fix that?
It should look like below (ignore the square and round), the issue is whole background looks like black instead of bg image.:
So the issue is background image is not loading, so do i have to add additional library to do that or any thing else?
Imagick Version: 6.7.7
convert -list delegate | grep svg
cdr => "uniconvertor' '%i' '%o.svg'; /bin/mv '%o.svg' '%o"
cgm => "uniconvertor' '%i' '%o.svg'; /bin/mv '%o.svg' '%o"
dot => "dot' -Tsvg '%i' -o '%o"
dxf => "uniconvertor' '%i' '%o.svg'; /bin/mv '%o.svg' '%o"
fig => "uniconvertor' '%i' '%o.svg'; /bin/mv '%o.svg' '%o"
svg => "rsvg-convert' -o '%o' '%i"
convert -list format | grep SVG
MSVG rw+ ImageMagick's own SVG internal renderer
SVG rw+ Scalable Vector Graphics (XML 2.9.1)
SVGZ rw+ Compressed Scalable Vector Graphics (XML 2.9.1)
I think you are on the wrong track. Image Magick is basically a pixel-oriented library. While rendering the background image might be a question of configuration, your picture shows that the font "embedding" you wanted to achieve isn't happening. And there lies the real problem.
What you want to achieve is representing the font information inside the SVG file. There are two ways to do that, and for both there is absolutely no support in IM:
converting the font to the SVG font format and embedding it inline in the file (produces large files)
converting all glyphs to paths (texts are no longer editable)
From your description I think you should be aiming for the second variant. You would basically exchange <text> elements in your string with <path> elements and otherwise write out the SVG file including the embeded image data as you received it.
How to convert text to SVG paths? is an older look at that problem.
EasySVG for PHP is a library that resulted from that question for the glyph-to-path conversion, but only provided you have the font already in SVG format. For typical desktop font formats like ttf, you might first have to look at font conversion tools like FontForge.
You might get a direct svg data transformation working via Cairo, but that is only a hunch, I haven't worked with it.
Finally, as a workaround, you could delegate the whole task to Inkscape. It can be called on the command line without starting the GUI as
inkscape in.svg --export-text-to-path --export-plain-svg=out.svg
I have ended up by storing fonts in raw svg and after that created svg file using fopen instead of using imagick.
So my svg is look like below:
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="600" height="400" viewBox="0 0 600 400" xml:space="preserve">
<desc>Created with Fabric.js 2.0.0-beta7</desc>
<defs>
<style>
//... base64 data of font
#font-face {
font-family: "Elsie";
src: url("data:application/font-truetype;charset=utf-8;base64,...")
}
</style>
</defs>
After that i have created svg file using below:
$file_name = uniqid($prefix).".svg";
$file_handle = fopen("$folder_name/".$file_name, 'w');
fwrite($file_handle, $raw_svg);
fclose($file_handle);
In addition to #ccprog's fantastic answer,
I'd like to mention you can generate the pixels you want using phantomjs, just feed the phantomjs with your input html file and output as a png.
I am using Imagick to product images from massive pdf files. I also want those images with RGB or sRGB color mode so Internet Explorer can display the images correctly.
I have tried
$im = new imagick($fileName.'[0]');
//$im->setImageColorspace(Imagick::COLORSPACE_SRGB); //try this already
// $im->setImageColorSpace(1); //try this already
$im->setResolution(300,300);
$im->setImageFormat('jpeg');
$im->writeImage($imageFile);
$im->clear();
$im->destroy();
I did get images but the color is way off with setImageColorspace and setImageColorSpace methods. (ex: color is inverted.)
If I comment out those methods, the images look right but some of them are not RGB mode and create problems in Internet Explorer.
I really need the RGB color mode on the images. Are there anyways to do it? Thanks so much!
You seem to encounter a problem with CMYK pdfs. Have you tried converting them to PNG? PNG -contrary to jpeg - only encodes RGB so the images will in any case be in the correct colorspace.
You might also want to have a look at ghostscript (the engine behind imagemagicks PDF conversion) and it's --UseCIE switch.
I wrote a php-wrapper to ghostscript which you can find at github that you might find usefull when you want to use ghostscript.
I'm working on a web project that involves a dynamically generated map of the US coloring different states based on a set of data.
This SVG file gives me a good blank map of the US and is very easy to change the color of each state. The difficulty is that IE browsers don't support SVG so in order for me to use the handy syntax the svg offers, I'll need to convert it to a JPG.
Ideally, I'd like to do this with only the GD2 library but could also use ImageMagick. I have absolutely no clue how to do this.
Any solution that would allow me to dynamically change the colors of states on a map of the US will be considered. The key is that it is easy to change the colors on the fly and that it is cross browser. PHP/Apache solutions only, please.
That's funny you asked this, I just did this recently for my work's site and I was thinking I should write a tutorial... Here is how to do it with PHP/Imagick, which uses ImageMagick:
$usmap = '/path/to/blank/us-map.svg';
$im = new Imagick();
$svg = file_get_contents($usmap);
/*loop to color each state as needed, something like*/
$idColorArray = array(
"AL" => "339966"
,"AK" => "0099FF"
...
,"WI" => "FF4B00"
,"WY" => "A3609B"
);
foreach($idColorArray as $state => $color){
//Where $color is a RRGGBB hex value
$svg = preg_replace(
'/id="'.$state.'" style="fill:#([0-9a-f]{6})/'
, 'id="'.$state.'" style="fill:#'.$color
, $svg
);
}
$im->readImageBlob($svg);
/*png settings*/
$im->setImageFormat("png24");
$im->resizeImage(720, 445, imagick::FILTER_LANCZOS, 1); /*Optional, if you need to resize*/
/*jpeg*/
$im->setImageFormat("jpeg");
$im->adaptiveResizeImage(720, 445); /*Optional, if you need to resize*/
$im->writeImage('/path/to/colored/us-map.png');/*(or .jpg)*/
$im->clear();
$im->destroy();
the steps regex color replacement may vary depending on the svg path xml and how you id & color values are stored. If you don't want to store a file on the server, you can output the image as base 64 like
<?php echo '<img src="data:image/jpg;base64,' . base64_encode($im) . '" />';?>
(before you use clear/destroy) but ie has issues with PNG as base64 so you'd probably have to output base64 as jpeg
you can see an example here I did for a former employer's sales territory map:
Start: https://upload.wikimedia.org/wikipedia/commons/1/1a/Blank_US_Map_(states_only).svg
Finish:
Edit
Since writing the above, I've come up with 2 improved techniques:
1) instead of a regex loop to change the fill on state , use CSS to make style rules like
<style type="text/css">
#CA,#FL,HI{
fill:blue;
}
#Al, #NY, #NM{
fill:#cc6699;
}
/*etc..*/
</style>
and then you can do a single text replace to inject your css rules into the svg before proceeding with the imagick jpeg/png creation. If the colors don't change, check to make sure you don't have any inline fill styles in your path tags overriding the css.
2) If you don't have to actually create a jpeg/png image file (and don't need to support outdated browsers), you can manipulate the svg directly with jQuery. You can't access the svg paths when embedding the svg using img or object tags, so you'll have to directly include the svg xml in your webpage html like:
<div>
<?php echo file_get_contents('/path/to/blank/us-map.svg');?>
</div>
then changing the colors is as easy as:
<script type="text/javascript" src="/path/to/jquery.js"></script>
<script type="text/javascript">
$('#CA').css('fill', 'blue');
$('#NY').css('fill', '#ff0000');
</script>
When converting SVG to transparent PNG, don't forget to put this BEFORE $imagick->readImageBlob():
$imagick->setBackgroundColor(new ImagickPixel('transparent'));
You mention that you are doing this because IE doesn't support SVG.
The good news is that IE does support vector graphics. Okay, so it's in the form of a language called VML which only IE supports, rather than SVG, but it is there, and you can use it.
Google Maps, among others, will detect the browser capabilities to determine whether to serve SVG or VML.
Then there's the Raphael library, which is a Javascript browswer-based graphics library, which supports either SVG or VML, again depending on the browser.
Another one which may help: SVGWeb.
All of which means that you can support your IE users without having to resort to bitmap graphics.
See also the top answer to this question, for example: XSL Transform SVG to VML
This is v. easy, have been doing work on this for the past few weeks.
You need the Batik SVG Toolkit. Download, and place the files in the same directory as the SVG you want to convert to a JPEG, also make sure you unzip it first.
Open the terminal, and run this command:
java -jar batik-rasterizer.jar -m image/jpeg -q 0.8 NAME_OF_SVG_FILE.svg
That should output a JPEG of the SVG file. Really easy.
You can even just place it in a loop and convert loads of SVGs,
import os
svgs = ('test1.svg', 'test2.svg', 'etc.svg')
for svg in svgs:
os.system('java -jar batik-rasterizer.jar -m image/jpeg -q 0.8 '+str(svg)+'.svg')
This is a method for converting a svg picture to a gif using standard php GD tools
1) You put the image into a canvas element in the browser:
<canvas id=myCanvas></canvas>
<script>
var Key='picturename'
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
base_image = new Image();
base_image.src = myimage.svg;
base_image.onload = function(){
//get the image info as base64 text string
var dataURL = canvas.toDataURL();
//Post the image (dataURL) to the server using jQuery post method
$.post('ProcessPicture.php',{'TheKey':Key,'image': dataURL ,'h': canvas.height,'w':canvas.width,"stemme":stemme } ,function(data,status){ alert(data+' '+status) });
}
</script>
And then convert it at the server (ProcessPicture.php) from (default) png to gif and save it. (you could have saved as png too then use imagepng instead of image gif):
//receive the posted data in php
$pic=$_POST['image'];
$Key=$_POST['TheKey'];
$height=$_POST['h'];
$width=$_POST['w'];
$dir='../gif/'
$gifName=$dir.$Key.'.gif';
$pngName=$dir.$Key.'.png';
//split the generated base64 string before the comma. to remove the 'data:image/png;base64, header created by and get the image data
$data = explode(',', $pic);
$base64img = base64_decode($data[1]);
$dimg=imagecreatefromstring($base64img);
//in order to avoid copying a black figure into a (default) black background you must create a white background
$im_out = ImageCreateTrueColor($width,$height);
$bgfill = imagecolorallocate( $im_out, 255, 255, 255 );
imagefill( $im_out, 0,0, $bgfill );
//Copy the uploaded picture in on the white background
ImageCopyResampled($im_out, $dimg ,0, 0, 0, 0, $width, $height,$width, $height);
//Make the gif and png file
imagegif($im_out, $gifName);
imagepng($im_out, $pngName);
I do not know of a standalone PHP / Apache solution, as this would require a PHP library that can read and render SVG images. I'm not sure such a library exists - I don't know any.
ImageMagick is able to rasterize SVG files, either through the command line or the PHP binding, IMagick, but seems to have a number of quirks and external dependencies as shown e.g. in this forum thread. I think it's still the most promising way to go, it's the first thing I would look into if I were you.
I would like to share my answer too it might help someone.
This it is more for simple case when your svg dose not contain fill style and by default black and you want to convert it to png and add color to result png.
function convertSvgToPng($svgPath, $fillColor, $outPath)
{
$im = new Imagick();
$svg = file_get_contents($svgPath);
// !!! THIS is the trick part - just appending to all <path fill color
$svg = str_replace('<path ', '<path style="fill:'.$fillColor.'" ', $svg);
$im->readImageBlob($svg);
$im->setImageFormat("png24");
$im->writeImage($outPath);
$im->clear();
$im->destroy();
}
You can use Raphaël—JavaScript Library and achieve it easily. It will work in IE also.
$command = 'convert -density 300 ';
if(Input::Post('height')!='' && Input::Post('width')!=''){
$command.='-resize '.Input::Post('width').'x'.Input::Post('height').' ';
}
$command.=$svg.' '.$source;
exec($command);
#unlink($svg);
or using : potrace
demo :Tool4dev.com
I'm working on a web project that involves a dynamically generated map of the US coloring different states based on a set of data.
This SVG file gives me a good blank map of the US and is very easy to change the color of each state. The difficulty is that IE browsers don't support SVG so in order for me to use the handy syntax the svg offers, I'll need to convert it to a JPG.
Ideally, I'd like to do this with only the GD2 library but could also use ImageMagick. I have absolutely no clue how to do this.
Any solution that would allow me to dynamically change the colors of states on a map of the US will be considered. The key is that it is easy to change the colors on the fly and that it is cross browser. PHP/Apache solutions only, please.
That's funny you asked this, I just did this recently for my work's site and I was thinking I should write a tutorial... Here is how to do it with PHP/Imagick, which uses ImageMagick:
$usmap = '/path/to/blank/us-map.svg';
$im = new Imagick();
$svg = file_get_contents($usmap);
/*loop to color each state as needed, something like*/
$idColorArray = array(
"AL" => "339966"
,"AK" => "0099FF"
...
,"WI" => "FF4B00"
,"WY" => "A3609B"
);
foreach($idColorArray as $state => $color){
//Where $color is a RRGGBB hex value
$svg = preg_replace(
'/id="'.$state.'" style="fill:#([0-9a-f]{6})/'
, 'id="'.$state.'" style="fill:#'.$color
, $svg
);
}
$im->readImageBlob($svg);
/*png settings*/
$im->setImageFormat("png24");
$im->resizeImage(720, 445, imagick::FILTER_LANCZOS, 1); /*Optional, if you need to resize*/
/*jpeg*/
$im->setImageFormat("jpeg");
$im->adaptiveResizeImage(720, 445); /*Optional, if you need to resize*/
$im->writeImage('/path/to/colored/us-map.png');/*(or .jpg)*/
$im->clear();
$im->destroy();
the steps regex color replacement may vary depending on the svg path xml and how you id & color values are stored. If you don't want to store a file on the server, you can output the image as base 64 like
<?php echo '<img src="data:image/jpg;base64,' . base64_encode($im) . '" />';?>
(before you use clear/destroy) but ie has issues with PNG as base64 so you'd probably have to output base64 as jpeg
you can see an example here I did for a former employer's sales territory map:
Start: https://upload.wikimedia.org/wikipedia/commons/1/1a/Blank_US_Map_(states_only).svg
Finish:
Edit
Since writing the above, I've come up with 2 improved techniques:
1) instead of a regex loop to change the fill on state , use CSS to make style rules like
<style type="text/css">
#CA,#FL,HI{
fill:blue;
}
#Al, #NY, #NM{
fill:#cc6699;
}
/*etc..*/
</style>
and then you can do a single text replace to inject your css rules into the svg before proceeding with the imagick jpeg/png creation. If the colors don't change, check to make sure you don't have any inline fill styles in your path tags overriding the css.
2) If you don't have to actually create a jpeg/png image file (and don't need to support outdated browsers), you can manipulate the svg directly with jQuery. You can't access the svg paths when embedding the svg using img or object tags, so you'll have to directly include the svg xml in your webpage html like:
<div>
<?php echo file_get_contents('/path/to/blank/us-map.svg');?>
</div>
then changing the colors is as easy as:
<script type="text/javascript" src="/path/to/jquery.js"></script>
<script type="text/javascript">
$('#CA').css('fill', 'blue');
$('#NY').css('fill', '#ff0000');
</script>
When converting SVG to transparent PNG, don't forget to put this BEFORE $imagick->readImageBlob():
$imagick->setBackgroundColor(new ImagickPixel('transparent'));
You mention that you are doing this because IE doesn't support SVG.
The good news is that IE does support vector graphics. Okay, so it's in the form of a language called VML which only IE supports, rather than SVG, but it is there, and you can use it.
Google Maps, among others, will detect the browser capabilities to determine whether to serve SVG or VML.
Then there's the Raphael library, which is a Javascript browswer-based graphics library, which supports either SVG or VML, again depending on the browser.
Another one which may help: SVGWeb.
All of which means that you can support your IE users without having to resort to bitmap graphics.
See also the top answer to this question, for example: XSL Transform SVG to VML
This is v. easy, have been doing work on this for the past few weeks.
You need the Batik SVG Toolkit. Download, and place the files in the same directory as the SVG you want to convert to a JPEG, also make sure you unzip it first.
Open the terminal, and run this command:
java -jar batik-rasterizer.jar -m image/jpeg -q 0.8 NAME_OF_SVG_FILE.svg
That should output a JPEG of the SVG file. Really easy.
You can even just place it in a loop and convert loads of SVGs,
import os
svgs = ('test1.svg', 'test2.svg', 'etc.svg')
for svg in svgs:
os.system('java -jar batik-rasterizer.jar -m image/jpeg -q 0.8 '+str(svg)+'.svg')
This is a method for converting a svg picture to a gif using standard php GD tools
1) You put the image into a canvas element in the browser:
<canvas id=myCanvas></canvas>
<script>
var Key='picturename'
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
base_image = new Image();
base_image.src = myimage.svg;
base_image.onload = function(){
//get the image info as base64 text string
var dataURL = canvas.toDataURL();
//Post the image (dataURL) to the server using jQuery post method
$.post('ProcessPicture.php',{'TheKey':Key,'image': dataURL ,'h': canvas.height,'w':canvas.width,"stemme":stemme } ,function(data,status){ alert(data+' '+status) });
}
</script>
And then convert it at the server (ProcessPicture.php) from (default) png to gif and save it. (you could have saved as png too then use imagepng instead of image gif):
//receive the posted data in php
$pic=$_POST['image'];
$Key=$_POST['TheKey'];
$height=$_POST['h'];
$width=$_POST['w'];
$dir='../gif/'
$gifName=$dir.$Key.'.gif';
$pngName=$dir.$Key.'.png';
//split the generated base64 string before the comma. to remove the 'data:image/png;base64, header created by and get the image data
$data = explode(',', $pic);
$base64img = base64_decode($data[1]);
$dimg=imagecreatefromstring($base64img);
//in order to avoid copying a black figure into a (default) black background you must create a white background
$im_out = ImageCreateTrueColor($width,$height);
$bgfill = imagecolorallocate( $im_out, 255, 255, 255 );
imagefill( $im_out, 0,0, $bgfill );
//Copy the uploaded picture in on the white background
ImageCopyResampled($im_out, $dimg ,0, 0, 0, 0, $width, $height,$width, $height);
//Make the gif and png file
imagegif($im_out, $gifName);
imagepng($im_out, $pngName);
I do not know of a standalone PHP / Apache solution, as this would require a PHP library that can read and render SVG images. I'm not sure such a library exists - I don't know any.
ImageMagick is able to rasterize SVG files, either through the command line or the PHP binding, IMagick, but seems to have a number of quirks and external dependencies as shown e.g. in this forum thread. I think it's still the most promising way to go, it's the first thing I would look into if I were you.
I would like to share my answer too it might help someone.
This it is more for simple case when your svg dose not contain fill style and by default black and you want to convert it to png and add color to result png.
function convertSvgToPng($svgPath, $fillColor, $outPath)
{
$im = new Imagick();
$svg = file_get_contents($svgPath);
// !!! THIS is the trick part - just appending to all <path fill color
$svg = str_replace('<path ', '<path style="fill:'.$fillColor.'" ', $svg);
$im->readImageBlob($svg);
$im->setImageFormat("png24");
$im->writeImage($outPath);
$im->clear();
$im->destroy();
}
You can use Raphaël—JavaScript Library and achieve it easily. It will work in IE also.
$command = 'convert -density 300 ';
if(Input::Post('height')!='' && Input::Post('width')!=''){
$command.='-resize '.Input::Post('width').'x'.Input::Post('height').' ';
}
$command.=$svg.' '.$source;
exec($command);
#unlink($svg);
or using : potrace
demo :Tool4dev.com
I need a PHP script to convert favicons to PNGs while keeping their original dimensions.
I know Google has it's secret icon converter - http://www.google.com/s2/favicons?domain=http://facebook.com/ but this converts favicons to 16x16 even if they they were originally larger. So basically I need this, minus the shrinking effect.
I've also seen this - http://www.controlstyle.com/articles/programming/text/php-favicon/ but I couldn't get it to work after hours of messing around with it.
Basically I am trying to automatically grab the icon for a link that will be as large as possible - automatically 48x48 png based on a URL would be the perfect scenario, but I don't know of any humanly possible way to do this given that no websites happen to keep a 48x48 icon in a publicly accessible spot.
Does anybody know of a script/service or have a suggestion? Thanks!
So I ended up using a class called FloIcon that could convert BMPs to ICO. I should note that it's always important to check the file type of an icon and not assume that .ico means bmp because some sites (like Facebook) were actually PNG).
#goker.cebeci Your service looks awesome! The main thing is that I needed my icons to be the maximum size when possible, so I just wrote my own script.
Here is a function to convert from bmp(ico) to png
http://us3.php.net/manual/en/function.imagecreate.php#53879
Download the ico to your server (file_get_contents or other methods) usually is favicon.ico at the base url, or scrape the html code for the <link rel="shortcut icon" href="ico_url_here" type="image/x-icon" /> element and extract the href
use the function from the link above to convert to the png
use the GD functions to open and resize
$image = imagecreatefrompng($filename);
$resized_image = imagecreatetruecolor($NewWidth, $NewHeight);
imagecopyresampled($resized_image, $image, 0, 0, 0, 0, $NewWidth, $NewHeight, $OriginalWidth, $OriginalHeight);
4 Save the file (imagepng or similar)
I used Imagemagick on my favicon to PNG convertor web service project.
convert "favicon.ico" -thumbnail 16x16 -alpha on -background none -flatten "favicon.png"
Some websites' favicons have scene and their sizes are bigger than 16x16 pixels
eg: http://blogger.com/favicon.ico
http://www.google.com/s2/favicons?domain=http://facebook.com/ does not work properly. So, I developed a web service for this.
If you want to try my web service you can go this way
http://geticon.org/of/http://facebook.com/ or this way
http://geticon.org/of/facebook.com
Code at http://www.controlstyle.com/articles/programming/text/php-favicon/ has small error:
You need to change $entry['swBitCount'] to $entry['wBitCount']. When I have made that changing all work right
imagecopyresized - the docs contains the example as well
The above require compiled with option --with-gd
I assume you did not aware of imagick extension as well
etc:
all possible image processing extensions/functions
Im using here: http://plugins.trac.wordpress.org/browser/wp-favicons/trunk/plugins/filters/convert_to_png.php a lib from here: http://www.tom-reitz.com/2009/02/09/ico-images-in-facebook-profile-boxes/
(I did not want to save the ico's to disk first)
The only problem with the lib is that it sometimes fails on the XOR e.g. on this favicon: http://www.slatch.com/
So that is something I need to fix in it but furthermore it worked great for thousands of icons.