Coldfusion file manipulation

The following example shows how to create an image with several drawing objects:. Note: To draw a sequence of connected lines, use the ImageDrawLines function. ColdFusion provides several functions for controlling the appearance of drawing objects. This function also controls the color of lines and shapes. To control line attributes other than color , use the ImageSetDrawingStroke function. The ImageSetDrawingStroke function uses a collection to define the line attributes.

Drawing controls apply to all subsequent drawing functions in an image; therefore, order is important. In the following example, the drawing stroke attributes defined in the attribute collection apply to the square and the two lines. Similarly, the color green applies to the rectangle and the square, while the color red applies only to the two lines.

You can reset a drawing control as many times as necessary within an image to achieve the desired effect. ColdFusion makes it easy to resize images. You can reduce the file size of an image by changing its dimensions, enforce uniform sizes on images, and create thumbnail images. The following table describes the ways to resize images in ColdFusion:. Resize images so that they fit in a defined square or rectangle and control the interpolation method.

Use the cfimage tag resize action to resize an image to the specified height and width. You can specify the height and width in pixels or as a percentage of the original dimensions of the image. Notice that this technique can distort the image.

The cfimage tag requires that you specify both the height and the width for the resize action. The cfimage tag resize action uses the highestQuality interpolation method for the best quality image at the cost of performance.

The ImageResize function is like the cfimage tag resize action. To ensure that the resized image is proportional, specify a value for the height or width and enter a blank value for the other dimension:.

The height value is blank. The ImageResize function also lets you specify the type of interpolation used to resize the image. Interpolation lets you control the trade-off between performance and image quality. By default, the ImageResize function uses the highestQuality interpolation method. To improve performance at the cost of image quality , change the interpolation method. Also, you can set the blur factor for the image. The default value is 1 not blurred.

The highest blur factor is 10 very blurry. The following example shows how to resize an image using the highPerformance form of interpolation with a blur factor of To create images of a uniform size, such as thumbnail images or images displayed in a photo gallery, use the ImageScaleToFit function.

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No reviews found. If you want to keep it dynamic, however, you could try playing around with the difference between the values:. Thanks guys. I figured there wasn't an inherently elegant solution. I already have the helper path set as a variable in the Application scope and have been using it. I was just hoping to find a more dynamic method. No worries though. Sorry for the confusion. I've designed the file structure so that each included template has a corresponding javascript file to separate all the js code from the presentation code.

I just borrowed the term from ASP. Hi, I'm trying to store an picture file's path into a database Set person. The code that creates the thumbnails was coded a certain way for a specific reason.

I was finding problems otherwise image not sizing proportionally. The key is to load the image into a variable and create a new file and then do the resize on the copy, rather than chaining commands by using a write method with src and dest params that are both the same filepath. I appreciate you sharing your code, but it doesn't help me in the list, partly because I'm such a n00b. I am trying to store the URL of the image I'm uploading into a database table, so I can retrieve it later.

I'm trying to get the path to a dataset from its datasource. But I need the absolute path for that and can't figure out how to do it. Probably staring me in the face but I haven't been able to find it.

Is there any way to get that? Assumptions: The datasource is to an MS Access database otherwise, there is no physical file to reference You won't have access to the API to get the info you want.

If a shared account, Ask the ISP for the filename and hard code that. For whatever reson images will not load. I looked at the cgi variables, but I can't find everything there I need to construct the path. I have to say that I use includes a lot and I define the path on the calling page the one with the include statement and use that path-variable in the called page.

Anyone happen to know if the file created by getTempFile will be automatically removed at any point? Nothing mentioned in the docs, and restarting CF doesn't remove them, so it seems it needs manual code, unless there's some scheduled task that will do it? As a side note, the part of the description which says with "whose name starts with at most the first three characters of prefix" is incorrect -- the actual behaviour is to include 'tmp' after the prefix if the prefix is less than three characters.

No idea why. Light Dark. If we run: ExpandPath ". ExpandPath CGI. Javier, Thanks a lot for the kind words : No worries about the bookmarking - it was only posted a few hours ago ; Glad all the programmatic config stuff is working out for you. Pretty nice Ben. I already have a similar thing for myself written down in my "CF cookbook".

Kerr Jul 25, at PM 2 Comments. Jim, These are ColdFusion functions - they should be system independent I think? Thank you! Ohh Thank you! I realize this is a rather old post, but a good one as always. Ted, Usually, when I need to always have a handle on a particular set of files, I put that code in the Application. From within the Application. Thank you. This is really helpful. Chuck, Thanks. Nikos Jun 16, at AM 1 Comments.

Thanks in advance for your thoughts. Tom, Custom tags paths are a bit different from the stuff I have outlined. Tom, Awesome dude!! Yeah, the app-specific mappings introduced in ColdFusion 8 are fantastic! I had been using this to get this stuff application. Brian, That's an interesting idea. Ben, Nope. Brian, Unfortunately, no central db.

If you care, more background below. Sean The app manages multiple instances. Sorry I had no more ideas on that problem. Ben, Never did. Worked around it and moved on. Ben, Sorry. Sean, Funky that expandPath would work differently in different parts of the page flow. Ben, I'm sure it was planetary alignment. Sean, Ha ha - word up; it's like trying to reproduce a problem when the warranty guy gets there. Here's what I mean: Page. Is there a method for this?

Does this even make sense? Chris, Not sure what you mean by Javascript code-behind? There is no javascript on the server. Chris, Interesting question. Sean: Sorry for the confusion. Remus Apr 28, at PM 2 Comments.