March 17, 2020 0 Comments

The ImageRead function performs the same operation as the cfimage read action . However, you cannot use the cfimage tag to read and create. You can use the cfimage tag to perform common image manipulation operations as a border; captcha; convert; info; read; resize; rotate; write; writeToBrowser. The other day, I needed to do some on-the-fly conversion of PNG image files to JPG format in ColdFusion. This was part of stop-gap measure at.

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Due to the wide array of image functionality in ColdFusion 8, I am going to try and break this tutorial up into several small and manageable parts.

Convert an image to a different format in this case PNG. Sign up using Email and Password. For those of you who took a look at the underlying Java methods, you can see that there’s a lot of stuff wrapped up in these image objects.

It’s not just important that the resultant data is image data, it’s also important that the last thing in the URL be the file name.

How do you convert a TIF image into PDF within coldfusion – Stack Overflow

The following are the valid values: This doesn’t mean the target file is a Cfimae data text file – this means the actual input value is Base64 image data: This reads color information, source value, and dimensions into a struct. The next input type is a ColdFusion image object. Border thickness in pixels.


Separate multiple fonts with commas.

Converting an image to grayscale using the CFIMAGE tag in ColdFusion | ColdFusion Examples

String, double – returns: I’m not sure it will work, since I haven’t tried it. You can specify both. The value must be an integer.

Since the destination here is not an image but a text file, the destination is required the internal Source of the image will not help us. Quality and performance differ based on image type and the size of the source file. The image is still off by like cfimagge pixels on cknvert width. A bit more details: Running the above code, we get the following CFDump output shown in Figure 1.

This specifies how the data is going to be written to the text file. If this value is blank, the width is calculated proportionately to the height. Now that we have a general overview of what kind of new and exciting image manipulation features are available in ColdFusion 8 and how many image types can be utilized, let’s get into the meat of this part of the tutorial: You can use the write action to change the quality of a JPEG image to reduce file size.

I would rather it try to grab the resultant data and throw an exception if the read fails.

Converting an image to grayscale using the CFIMAGE tag in ColdFusion

Values between 00 and FF are allowed. For example, using a URL with this query string: Sign up using Facebook.

If you specify false default or omit the argument, the Base64 is written to the file without any headers. This is the format of the image that we are going to encode. The read action requires name attribute. Creates a ColdFusion image that can be manipulated by using image functions.


ColdFusion 8 has given us CFImage. This kind of functionality can be super useful if you are interfacing with another Java component that handles image manipulation using the java.

You cannot display a GIF image in a browser. Also notice that the destination image was a GIF file format.

You convwrt control the thickness of the border and its color. It’s awesome that there is such a variety of input and output methodologies. ColdFusion calculates the width proportionally to the height. String getWidth – returns: Does it make any difference if you code the conversion of the image within the cfdocument tag attributes instead of within the tags?

Did anyone else see “URL” and get mentally turned on?


For more information about what these do as they are undocumented cfimag, try exploring the java. Post as a guest Name. By default ColdFusion will throw an error if there are naming conflicts. The following example shows how to reduce the size of an image and display it in the browser: In the first example we are using the CFImage tag in conjunction with an absolute path name to the image.