For info:
If you are not aware, although .png images have advantages (no licence fee is payable for commercial use etc) many older browsers do not understand the "transparrent" data in ".png" images and thus diplay them as "normal", particularly it seems if you are using, as I am on for the "wind direction" on my "index" page, one transparrent image overlaid with another.
Maybe a retrospect technical step, but the answer is to convert them to transparent .gif images which can be read by both older, and newer browsers.
Welcome to the Cumulus Support forum.
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4019) - 03 April 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4019) - 03 April 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Overlaid transparent images
Moderator: daj
-
beteljuice
- Posts: 3292
- Joined: Tue 09 Dec 2008 1:37 pm
- Weather Station: None !
- Operating System: W10 - Threadripper 16core, etc
- Location: Dudley, West Midlands, UK
Re: Overlaid transparent images
How old a browser are you talking about ?
The only problem I had with your page was the 20px ? drop on the overlay, which you have fixed.
Nice adaptation BTW
The only problem I had with your page was the 20px ? drop on the overlay, which you have fixed.
Nice adaptation BTW
......................Imagine, what you will KNOW tomorrow !
-
goldrush
- Posts: 183
- Joined: Mon 27 Oct 2008 4:50 pm
- Weather Station: Fine Offset WH1081
- Location: Aberdeenshire, Scotland
- Contact:
Re: Overlaid transparent images
Hi beteljuice
"Nice pages" all down to you<BG>
The 20px drop seems to have been due to me using "absolute" positioning for both images (I have NO idea how Java and all that technical stuff works!!) seems to have been "cured" by using "relative" positioning.
Even IExplorer 6 seems to have trouble when .png files are overlaid, but sorts out .gif files ok.
keep up the good work
"Nice pages" all down to you<BG>
The 20px drop seems to have been due to me using "absolute" positioning for both images (I have NO idea how Java and all that technical stuff works!!) seems to have been "cured" by using "relative" positioning.
Even IExplorer 6 seems to have trouble when .png files are overlaid, but sorts out .gif files ok.
keep up the good work
-
TNETWeather
Re: Overlaid transparent images
IE6 is not considered a safe browser even by Microsoft now days. Users using it should upgrade.goldrush wrote:Even IExplorer 6 seems to have trouble when .png files are overlaid, but sorts out .gif files ok.
BTW.. the issues with GIF licensing was resolved some time ago. That is why GD and other packages reinstated GIF as a format.
Re: Overlaid transparent images
Hi guys,
I'm not a great fan of the GIF format for the reasons stated above, but mostly because it only has a 1 bit alpha channel. That means its transparency is either all-on, or all-off, and nothing in between. The result is usually a rather jagged-looking thing, as proper anti-aliasing is not possible.
For some reason IE used to be particularly poor at handling PNG files, but their later browsers are a standards compliant in this matter, so PNGs work well even in IE nowadays.
In my view, the GIF's 1-bit alpha channel can be considered a serious enough draw back by web-designers for the format to fall out of favour even more in future. Proper PNG support in IE will accelerate this... but I have been known to be wrong about my far future predictions before
my 2c
Regards
Gumm
I'm not a great fan of the GIF format for the reasons stated above, but mostly because it only has a 1 bit alpha channel. That means its transparency is either all-on, or all-off, and nothing in between. The result is usually a rather jagged-looking thing, as proper anti-aliasing is not possible.
For some reason IE used to be particularly poor at handling PNG files, but their later browsers are a standards compliant in this matter, so PNGs work well even in IE nowadays.
In my view, the GIF's 1-bit alpha channel can be considered a serious enough draw back by web-designers for the format to fall out of favour even more in future. Proper PNG support in IE will accelerate this... but I have been known to be wrong about my far future predictions before
my 2c
Regards
Gumm