February 10th, 2011, 06:56 PM #1
.png Images in LGK
I am a daily visitor and contributor to the random picture thread and I noticed that I have never been able to see any posts that have a png image inserted. All I see is a blank post. In order for me to see the image, I have to hit the quote button, copy the image address and then paste the image address into my browser. When I am browsing other sites with png images, I can see them just fine.
When I look at the same thread on my mac with safari, the images appear normally.
Is there a setting within the browser that I need to tweak or is there something within LGK that I need to adjust?
*Windows 7 pro running IE8*
Thanks in advance!
February 10th, 2011, 08:22 PM #2
It's an IE problem I think. Rinkrat said png doesn't load on the site through IE.
February 11th, 2011, 02:01 PM #3
February 11th, 2011, 04:00 PM #4
Web browser support for PNG
Main article: Web browser image format support
PNG support first appeared in Internet Explorer 4.0b1 and in Netscape 4.04.
Despite calls by the Free Software Foundation and the World Wide Web Consortium (W3C), tools such as gif2png, and campaigns such as burn all gifs, PNG adoption on websites has been fairly slow.
GIF is found to be in use more than PNG for a few reasons:
* No support on old browsers (such as Internet Explorer below version 4).
* No animation, still images only (unlike GIF, though Mozilla's unofficial APNG format is a potential solution).
PNG compatible browsers include: Apple Safari, Google Chrome, Mozilla Firefox, Opera, Camino, Internet Explorer 7 (still numerous issues), Internet Explorer 8 (improved) and many others. For the complete comparison, see Comparison of web browsers (Image format support).
However, Internet Explorer (Windows), has numerous problems which prevent it from correctly rendering PNG images.
* 4.0 crashes on large PNG chunks.
* 4.0 does not include the functionality to view .png files, but there is a registry fix.
* 5.0 and 5.01 have broken OBJECT support.
* 5.01 prints palette images with black (or dark gray) backgrounds under Windows 98, sometimes with radically altered colors.
* 6.0 fails to display PNG images of 4097 or 4098 bytes in size.
* 6.0 cannot open a PNG file that contains one or more zero-length IDAT chunks. This issue was first fixed in security update 947864 (MS08-024). For more information, see this article in the Microsoft Knowledge Base: 947864 MS08-024: Cumulative Security Update for Internet Explorer 
* 6.0 sometimes completely loses ability to display PNGs, but there are various fixes.
* 6.0 and below has broken alpha-channel transparency support (will display the default background color instead). However there are various fixes:
o Degradable PNG Transparency for IE6
o webfx - PNG Behavior (IE behavior/.htc)
o The PNG problem in Windows Internet Explorer (IE behavior/.htc) (unmaintained)
o TwinHelix - Near-native PNG support with alpha opacity to IE 5.5 and 6 (IE behavior/.htc)
o A Better IE 5.5 and 6 PNG Fix (supports CSS background-position, background-repeat) (IE behavior/.htc)
o PNG-24 Alpha Transparency With Microsoft Internet Explorer or better (MSIE 5.5+) (PHP)
o Cross Browser PNG Transparency (CSS)
o CSS PNG fix (with background call none fix) (CSS)
o SitePoint - Use 8-bit PNGs with Fireworks
o Use 8-bit PNGs with Photoshop and pngquant
o Dean Edwards’s IE7.js and IE8.js fixes this issue (for specially-named .PNG files, for performance reasons), and other IE 5.5, 6, and 7 CSS incompatibilities as well.
* 7.0 and below cannot combine 8-bit alpha transparency AND element opacity (CSS - filter: Alpha(opacity=xx)) without filling partially transparent sections with black.
* All versions prior to 9.0 have inconsistent/broken gamma support.
* No versions prior to 9.0 have color-correction support.
Hope this helps.