One great (third party) tool to resize your images if available is imagemagick's command line tool: convert, with many options and features. Here is an example:
passthru("convert -normalize -background white -quality 95 -resize x768\> -resize 1280x\> -support 0.8 +repage -interlace plane $tmpFile $destFile");
(will convert an image with maximum width 1024 or maximum height 768)
Now how about if this tool is not available?
Php can also be used to create and manipulate image files if compiled with the GD library (read more here)
So here comes a handy function that can be used for resizing both thumbnails and normal size images:
function ResizeImage($originalImage, $toWidth, $toHeight, $filename, $thumb = false)
{
// Get the original geometry and calculate scales
list($width, $height) = getimagesize($originalImage);
$xscale = $width/$toWidth;
$yscale = $height/$toHeight;
// Recalculate new size with default ratio
$offsetX = 0;
$offsetY = 0;
if ($thumb)
{
$new_width = $toWidth;
$new_height = $toHeight;
$ratioComputed = $width / $height;
$cropRatioComputed = (float) 1 / (float) 1;
if ($ratioComputed < $cropRatioComputed)
{ // Image is too tall so we will crop the top and bottom
$origHeight= $height;
$height= $width / $cropRatioComputed;
$offsetY= ($origHeight - $height) / 2;
}
else if ($ratioComputed > $cropRatioComputed)
{ // Image is too wide so we will crop off the left and right sides
$origWidth= $width;
$width= $height * $cropRatioComputed;
$offsetX= ($origWidth - $width) / 2;
}
}
else
{
if ($yscale>$xscale)
{
$new_width = round($width * (1/$yscale));
$new_height = round($height * (1/$yscale));
}
else
{
$new_width = round($width * (1/$xscale));
$new_height = round($height * (1/$xscale));
}
}
// Resize the original image
$imageResized = imagecreatetruecolor($new_width, $new_height);
$imageTmp = imagecreatefromjpeg ($originalImage);
imagecopyresampled($imageResized, $imageTmp, 0, 0, $offsetX, $offsetY, $new_width, $new_height, $width, $height);
return (imagejpeg($imageResized, $filename));
}
With PHP's usort function you are sorting an array using a custom function you have made:
function sort_by_title($a,$b)
{
return strcasecmp($a['title'], $b['title']);
}
$myArray[0]['id'] = 1;
$myArray[0]['title'] = 'Hello';
$myArray[1]['id'] = 5;
$myArray[1]['title'] = 'Foo';
$myArray[2]['id'] = 6;
$myArray[2]['title'] = 'Foo etc';
.... and so on
usort($myArray, 'sort_by_title');
How about sorting the same array using a particular sequence of either ids, titles or whatever field of the record (using an array)?
Here is the solution:
(this example sorts the above array by a sequence that refers to the title field)
function sort_by_seq($a,$b)
{
$seq = array('Foo', 'Hello', 'Foo etc');
return array_search($a['title'], $seq) - array_search($b['title'], $seq);
}
usort($myArray, 'sort_by_seq');
Check out also another (sql related) tip for sorting sql result rows:
http://programming.pblogs.gr/general-tips.html which will be updated continuity with new tips.
Back to posts...
So I just made my first Firefox add-on: 'Bookmarks menu'
More on that here.
A good place to start is Mozilla developers center and also "How to develop a Firefox extension"
What you will need is some html, javascript and XUL (XML User Interface Language) knowledge in order to make a Firefox add-on, time and a lot of Firefox restarts.
Well you may avoid the last since there is a helpful add-on called "Extension Developer".
Also recently Mozilla launched Jetpack an early beta of a project that will allow any web developer to build an extension easily as building a web site
Well markp
added pingbacksto our pblogs. It kinda replaced trackbacks.
So checking
if it works!
Blocksum is a great freeware puzzle game I discovered a
few days ago.
Really addictive!
After Patfhinder
Avatars, now we have a new Pathfinder Signup page!
That page uses real time checking for the user name the user
picks does not exist and also for the rest fields required for the
sign up process.
At my previous programming era, I did some DirectX programming
with Borland Delphi (pascal language), building at that time
Tetricom (a
tetris - TetriNet clone).
Now I decided to get involved with C++ and DirectX (having already
some
expirience with C++ at my work).
With joy I learned that Visual C++ is available as a free download!
So I downloaded and installed the following (all free
downloads):
After some trials, failures and google searches I managed to
compile succesfully my
first DirectX program in C++!
The first Unreal Engine 3 title for PC has just been released as
BeyondUnreal reports and
it's name is RoboBlitz.
Also RoboBlitz includes a customized version of Unreal Editor of
UE3!
Hopefully I will find a demo of the game to see Unreal Engine 3 in action
before Unreal Tournament 2007!
Lately I discovered a great pinball video game called Dream Pinball 3D that is
really a dream!:) with great graphics and game play.
Playing it I remembered Pinball
fantasies another great pinball game (first released in Amiga
those days) I used to play in DOS era and I decided to try it again
using DOSbox. Well
since I had not tried DOSbox before I can say the result was very
good with this game.
Also if you like Sudoku, play it here on line (very good site and
also great Js programming).
As a web developer I always use Firefox and one of it's great
features is extensions. Extensions is
actually plug-ins that anyone with some
programming skills can write, and so there are so many
extensions out there.
One extension that I thought today is one that you could edit
(and then save & view locally) the HTML source of a site. Well
even this one
exists (and I thought that I could involved with extension
writing my self... well who knows I may will)
Some extensions I use at work are
Tab mix plus,
HTML validator, ie
tab and other I can't remember right now (I'm at home) and
Adblock
here at home.
Firefox is really
powerful... it can be transformed to a another
application with the power of its web engine. www.ajaxlaunch proves it. Really
impressive!
Waiting for Firefox 2... (Mozillazine
says that beta 2 Milestone has been released)
