Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I am aware that this is a PHP related question, but you can achieve nice transparent gradients with use of javascript and html5 canvas element.</p> <p>So I wrote this small script that:</p> <ul> <li>detects browsers that support canvas element, if browser doesn't support canvas (fortunately only a few percent of users are left) then full image is displayed.</li> <li>creates canvas and appends element after image</li> <li>arguments in the create_gradient() function can be changed for custom shapes</li> <li>it works with all popular image formats ( tested with .jpg, .bmp, .gif, .png ) </li> <li>you can add more ‘colorstops’ ( <code>grd.addColorStop()</code> ) to change the flow of the gradient</li> </ul> <p><strong>script</strong></p> <pre><code>window.onload = function() { if ( typeof CanvasRenderingContext2D !== 'function' ) { document.getElementById('gradient-image').style.visibility = "visible"; return; } var image = document.getElementById('gradient-image'); // these are the default values, change them for custom shapes create_gradient( image, image.width/2, image.height/2, image.height/4, image.width/2, image.height/2, image.height/2 ); } function create_gradient( image, start_x, start_y, start_r, end_x, end_y, end_r ){ var canvas = document.createElement('canvas'); var parent = image.parentNode; if ( parent.lastchild == image ) parent.appendChild(canvas); else parent.insertBefore(canvas, image.nextSibling); canvas.width = image.width; canvas.height = image.height; var context = canvas.getContext('2d'); var grd = context.createRadialGradient( start_x, start_y, start_r, end_x, end_y, end_r ); grd.addColorStop(0, 'rgba(0,0,0,1)' ); // grd.addColorStop(0.2, 'rgba(0,0,0,0.8)' ); grd.addColorStop(1, 'rgba(0,0,0,0)' ); context.fillStyle = grd; context.fillRect(0, 0, image.width, image.height); var grd_data = context.getImageData(0, 0, image.width, image.height); context.drawImage( image, 0, 0); var img_data = context.getImageData(0, 0, image.width, image.height); var grd_pixel = grd_data.data; var img_pixel = img_data.data; var length = img_data.data.length for ( i = 3; i &lt; length; i += 4 ) { img_pixel[i] = grd_pixel[i]; } context.putImageData(img_data, 0, 0); } </code></pre> <p><strong>html</strong></p> <pre><code>&lt;img id="gradient-image"src=""&gt; </code></pre> <p><strong>css</strong></p> <pre><code>#gradient-image { position: absolute; visibility: hidden; } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POHow can I have a nice radial transparent gradient applied to an image with PHP?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDanijel
    1. USDanijel
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COConsidering this article (few months old, but still) http://thenextweb.com/apps/2012/10/01/internet-explorer-8-falls-25-market-share-firefox-15-passes-10-mark-chrome-loses-users/ there is more then 25% still on IE8 or lower. So even with a major drop to 15% which I doubt has happend, you are telling a lot of people that they are not good enough for your site. And considering canvas/javascript is terribly slow on android devices and older iOS devices, I would definitly not use javascript for things like this.
      singulars
      1. PO
      1. USHugo Delsing
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload