I wrote a basic routine to accomplish this awhile back using <CFImage> and decided to revisit it.
I found out it needed major rework!
There were all types of exceptions dealing with transparent png and gif files.
After spending 2+ days on it, I believe the following is a solid solution.
Usually you just have a reference to an image source in a database. Almost all sites have their images on a CDN and the code was written with this in mind.
What if you want to create a thumbnail of that original image instead of serving the full image and using CSS to resize? Or having to create multiple thumbnail files?
This is a dynamic way to create a thumbnail or serve the full-size image without having to run ColdFusion on the calling page.
Basically, we will call a .cfm file as the source of an <img> tag, passing it parameters.
There’s info and examples out there to accomplish this but none have fully addressed the issues I was encountering.
Some transparent gif/png files would render correctly, others not. Files in jpg format would display at a lower quality than intended.
Code will work and tested with the following formats:
gif
transparent gif
grayscale gif
png
transparent png
grayscale png
jpg
I wrote this as a simple CFM so you can grab and test quickly, feel free to convert to a CFC.
The biggest issue I encountered was colorSpace on transparent files. The images would display in a format that did not use the color profile intended.
Then I found a post by Raymond Camden here, describing how to access the underlying Java colorSpace – simply brilliant!
I re-purposed some of that code to apply the CS_sRGB generic colorSpace to transparent images using the W3 recommended colorSpace listed here.
The code resizes an image, if specified – and slightly sharpens the image if resized.
You can resize the image downward, upward or serve the image at it’s original dimensions.
There is no compression, all images are served in “png” format, to allow for correct colorSpace and quality.
There is a slight delay as images are processed and loaded, but it’s minimal. This is the cost for being dynamic/virtual. 
Files in jpg format load much faster than gif or png. Transparent gif files take the longest.
Code works with files in png, jpg and gif format. Animated gif files are not supported, that’s a <CFImage> limitation. Though it will show the first frame of the animated gif file.
To make this completely virtual, I took advantage of CF 9+ Virtual File System(RAM Disk). You can write files to memory and then read them back in. The code writes out files, reads them and then immediately deletes them from memory.
Files are displayed with the correct aspect ratio, calculated using the width parameter sent to the cfm.
To serve an image you pass an image parameter and a width parameter(pixels):
<img src="getImage.cfm?i=http://mycdn.com/borg_queen.png&w=100">
If you want to serve the image with original dimensions, do not send the width parameter:
<img src="getImage.cfm?i=http://mycdn.com/borg_seven.jpg">
If you want to create a transparent 1×1 tracking pixel:
<img src="getImage.cfm?w=1">
* If a requested image does not exist, a transparent image will be created with the dimensions calculated by the width parameter.
I did run into an issue with IE 8(big surprise), where the image dimensions were not recognized when the image loads. Here is the CSS fix:
img {
width:auto;
height:auto;
}
You can also create an image tag dynamically using jQuery:
var _iPath = "i=http://path_to_my/image.jpg";
var _w = "w=100";
var _i = $("<img/>").attr("src","getImage.cfm?" + _iPath + "&" + _w);
* If you are trying to serve an image from Amazon S3 and it does not render, the image needs to be made “public”. If you have a policy on the bucket that holds the image, it should still be protected.
ColdFusion
<cftry>
<cfparam name="URL.i" default="">
<cfparam name="URL.w" default="">
<cfif Trim(URL.i) NEQ "">
<!--- grab image --->
<cfimage name="imgObj" source="#Trim(URL.i)#">
<!--- if not an image - create blank image --->
<cfif NOT IsImage("#imgObj#")>
<cfthrow>
</cfif>
<!--- if image width or URL.w LTE 1, create 1x1 --->
<cfif (Trim(URL.w) NEQ "" AND (URL.w LTE 1)) OR (ImageGetWidth(imgObj) LTE 1)>
<cfset URL.w = 1>
<cfthrow>
</cfif>
<!--- if .png or .gif - fix colorspace --->
<cfif Right(Trim(URL.i),4) IS ".png" OR Right(Trim(URL.i),4) IS ".gif">
<cfset imgFromBuffer = imageGetBufferedImage(imgObj)>
<!--- apply generic colorSpace --->
<cfset gCS = createObject("java","java.awt.color.ColorSpace").CS_sRGB>
<cfset colorProfile = createObject("java","java.awt.color.ColorSpace").getInstance(gCS)>
<cfset convert = createObject("java","java.awt.image.ColorConvertOp").init(colorProfile,javaCast("null",""))>
<cfset newImage = convert.filter(imgFromBuffer, javaCast("null",""))>
<cfset imgObj = imageNew(newImage)>
</cfif>
<!--- CFCONTENT needs file ext so we have to write/read/delete file --->
<!--- create unique filename --->
<cfset imgPathFilename = "ram:///" & CreateUUID() & ".png">
<!--- write image to ram --->
<cfimage action="write" source="#imgObj#" destination="#imgPathFilename#">
<!--- read image from ram --->
<cfimage name="imgObj" source="#imgPathFilename#">
<!--- delete image from ram --->
<cffile action="delete" file="#imgPathFilename#">
<!--- scale/sharpen only if width request --->
<cfif Trim(URL.w) GT 1>
<!--- scale image --->
<cfimage
name="imgObj"
source="#imgObj#"
action="resize"
width="#Trim(URL.w)#"
height=""
>
<!--- sharpen image --->
<cfset ImageSharpen(imgObj,1.5)>
</cfif>
<!--- serve image --->
<cfcontent type="image/png" variable="#imageGetBlob( imgObj )#">
<cfelse>
<cfthrow>
</cfif>
<cfcatch>
<!--- on error create a transparent image --->
<cfif Trim(URL.w) IS "">
<cfset URL.w = 1>
</cfif>
<cfset blankImg = ImageNew("",Trim(URL.w),Trim(URL.w),"argb") />
<!--- CFCONTENT needs file ext so we have to write/read file --->
<!--- create unique filename --->
<cfset imgPathFilename = "ram:///" & CreateUUID() & ".png">
<!--- write image to ram --->
<cfimage action="write" source="#blankImg#" destination="#imgPathFilename#">
<!--- read image from ram --->
<cfimage name="blankImg" source="#imgPathFilename#">
<!--- delete image from ram --->
<cffile action="delete" file="#imgPathFilename#">
<cfcontent type="image/png" variable="#imageGetBlob( blankImg )#">
</cfcatch>
</cftry>
See the full working example here.
Great books are available on ColdFusion here
Tested in:
ColdFusion 9+
FF 3.6+, Safari, Chrome, IE8+, iOS
I am extremely impressed together with your writing skills and also with the structure on your blog. Is that this a paid subject or did you customize it yourself? Either way stay up the nice quality writing, it’s rare to look a great weblog like this one nowadays.
Thanks for the kind comments. Customized entirely by me
I’d constantly want to be update on new posts on this internet site , bookmarked ! .
Great web site you have got here.. It’s hard to find good quality writing like yours these days. I seriously appreciate individuals like you! Take care!!
This is especially useful if the person you’re inquiring about has a less than common name.
I set an example of such information to demonstrate the formatting of a typical contact page as shown below:
. Incompatibility: Rails’ structured and organized approach can be its strength as well as
weakness in terms of flexibility and compatibility.
The website will also serve as a portal for all things convention related, from a countdown clock to information on logistics, credentials, media walkthroughs and housing.
No software to buy, no code to learn, all you need is to be a little Internet
savvy and know how to click your mouse. I discovered
the way to make money on the internet.
Make money on autopilot is available for all
of us. Not only do you want lots of people to visit your website but you also want your
visitors to stay on your site and see if the deal is worthwhile by simply checking out your site.
A money making attitude plus a money making opportunity almost always
result in a money making reality.
Most of the card dealers sell their cards online through
websites that specialize in international calling cards.
The website navigation should cater to both the users and the search engine bots.
You will also find 30 free tools, and software programs to help you build a successfull Internet
Business.
When you bike France you create the opportunity to travel on your own or be part of other guests to partake in a bicycle tour.
‘ A vehicle overtakes a bicycle and does not allow the bicycle enough space to safely pass and
caused the cyclist to fall off the bike. This mount can be installed either vertically or horizontally, depending on the preference of
the cyclist.
Many vintage cycling clothing items have reappeared after disappearing for several years.
As your child migrates to cycling on the road, they will be at increased risk and
a few new guidelines may help:It is important to note
that you are not nearly as visible as cars and not all cars behave perfectly.
The first time you need to use it, you’ll be happy you bought it.
Para ser justos preparo una segunda entrada con las marcas que
no aparecen en este.
En nuestros documentales de bodas, os entregamos todas las fotografías
que disparemos durante el día.
It’s enormous that you are getting thoughts from this paragraph as well as
from our argument made at this place.
Lisätietoa: http://juegos-gratis-ya.com/blog/groups/kesaksi-kengat-1513818775/
I think this is among the most vital info for me. And i’m happy reading your article.
But wanna commentary on some common things, The website
taste is perfect, the articles is really excellent : D.
Just right activity, cheers
This paragraph provides clear idea in support of the new users of blogging, that actually how
to do blogging.
After exploring a number of the articles on your blog,
I seriously appreciate your technique of writing a blog.
I book marked it to my bookmark site list and will be checking back soon. Take a look
at my website too and let me know what you think.
I like what you guys tend to be up too.
Such clever work and reporting! Keep up the wonderful works guys I’ve incorporated
you guys to blogroll.
Fotógrafo de la Guardia Real de la Casa de S.M.
El Rey en mil novecientos noventa y ocho, acumula
una gran experiencia en todo tipo de fotografías y actualmente efectúa,
entre otros muchos trabajos, documentales de boda en la capital española con abundantes registros para
que cada pareja de novios decida qué estilo desea imprimir a su álbum.
I’ve learn several good stuff here. Definitely
price bookmarking for revisiting. I wonder how a lot attempt you place to make the sort of excellent informative
web site.
my website jobs new zealand
Socio fundador de Objetivo Valencia Fotografía,
donde imparte cursos y talleres de fotografía, realiza viajes fotográficos y fotografía de estudio.
Aparte de otros abundantes conocidos dispara largo
de su tiempo de vida, ella es conocida por hacer una sesión de fotos con John Lennon para
Rolling Stone.
Me da mucha curiosidad el verme algún día con ellas
puestas..
Nice blog right here! Also your site loads up very
fast! What web host are you the usage of? Can I get your associate hyperlink to your host?
I wish my web site loaded up as quickly as yours lol
Unquestionably believe that that you said. Your favorite reason appeared to be
at the net the easiest factor to have in mind of.
I say to you, I certainly get irked while folks think about concerns that they plainly don’t recognise about.
You controlled to hit the nail upon the highest and outlined
out the entire thing without having side effect , other folks can take a signal.
Will likely be back to get more. Thanks
buy photoshop cs5 download microsoft office discount for teachers Autodesk Infrastructure Design Suite Ultimate 2016 where can i buy microsoft office 2010 for mac student discount microsoft office for mac uk
Parabéns pelo artigo, bastante detalhado. http://www.bukpravda.cv.ua/news/chernovtsy/item/41805
I see you don’t monetize your blog, don’t waste your traffic, you can earn additional bucks every month because you’ve got
high quality content. If you want to know how to make extra money, search for:
Mertiso’s tips best adsense alternative
This piece of writing presents clear idea
in favor of the new users of blogging, that genuinely how to do
running a blog.
My new web scheme:
http://thomas.forum.telrock.net
Attractive section of content. I just stumbled upon your web site and in accession capital to
assert that I acquire in fact enjoyed account your blog posts.
Anyway I will be subscribing to your augment and even I achievement you access consistently fast.
Btc 1AHRQRgR7Hn6MNQEVzzHYCLWAJKjGPP2gV
Please let me know if you’re looking for a article author for your site.
You have some really great posts and I believe I would be a good asset.
If you ever want to take some of the load off, I’d absolutely love to write some articles for your blog in exchange for a link back to mine.
Please send me an email if interested. Many thanks!
Loading an image via the img tag using ColdFusion
mackage canada http://www.mackagesale.com/mackage-men-c-1/
Hello to every body, it’s my first pay a visit of this web
site; this web site contains remarkable and genuinely fine information for visitors.
Centro hoteles baratos en guadalajara,
C.P. 44100 Jalisco, México.
Everything is very open with a really clear explanation of the issues.
It was really informative. Your site is useful.
Thank you for sharing!
hOur company offers non prescription products. Visit our health contributing site in case you want to feel better. Our company offers a wide variety of non prescription products. Visit our health website in case you want to to improve your health with a help of general health products. Our company provides a wide variety of non prescription products. Visit our health portal in case you want to feel better with a help of general health products. Our company provides a wide variety of non prescription products. Visit our health site in case you want to strengthen your health with a help health products. Our company offers health products. Take a look at our health contributing site in case you want to feel better. Our company provides a wide variety of non prescription drugs. Take a look at our health portal in case you want to look better with a help of generic supplements.
Our company offers a wide variety of non prescription products. Take a look at our health portal in case you want to look better with a help health products. Our company provides a wide variety of non prescription drugs. Visit our health portal. Our company offers a wide variety of non prescription drugs. Look at our health portal in case you want to to improve your health with a help generic supplements. Our company provides health products. Take a look at our health contributing site in case you want to feel better. Our company offers herbal pharmacy. Visit our health contributing site in case you want to feel healthier.
Pingback: buy review movie
Eke Interior là công ty giá thiết kế nội thất kế nội
thất tại TPHCM.
Nhận thu mua đồ gỗ các ngày trong tuần, thu mua 24h.
Tên giá dự án sun grand city láng hạ án: Tổ
hợp thương mại & căn hộ Mon Central.
У меня новость. Так много не честных компаний развелось выдающих займы онлайн, что невмоготу встречать невознаграждаемый сервис подбора займов без регистрации и списывания денег за подбора. Незадолго наткнулся на правильный сайте где дают круглосуточные займы.
Беру займы на карту онлайн только здесь
займы
Might be reproduced by mousing over them in the chat wheel customization UI.
Emoticons animations typically play at larger velocity
and slow all the way down to normal speed over time. Yasha and Kaya: Alt-description exhibits “Dispellable.” as a substitute of “Yasha-primarily based movement speed bonuses from multiple items don’t stack.”, and doesn’t mention Kaya’s non-stacking caveat.
Trident: Holding Alt doesn’t mention the caveats
about Yasha-based motion velocity bonuses or Kaya’s non-stacking, and the section at the bottom stating that
Trident combines Sange, Yasha, and Kaya is,
in my opinion, extraneous. Royal Jelly: “Use” effect part
ought to be green, not blue, to match different consumables.
Greater Faerie Fire: “Imbue” description should be inexperienced to match other
consumables. Mango Tree: Missing interval at the top of impact description. Force
Boots: “Speed Unlock” section doesn’t have a visible header like different passives
and is lacking a period at the tip. Veil of Discord: “Basilius Aura” section does not have a visual header like other passives.
Bloodstone: “Mana Battery” part does not have a visible header like other passives.
website here гидра