I have a site where users can upload images. I process these images directly and resize them into 5 additional formats using the CodeIgniter Image Manipulation class. I do this quite efficiently as follow:
I always resize from the previous format, instead of from the original
I resize using an image quality of 90% which about halves the file size of jpegs
The above way of doing things I implemented after advise I got from another question I asked. My test case is a 1.6MB JPEG in RGB mode with a high resolution of 3872 x 2592. For that image, which is kind of borderline case, the resize process in total takes about 2 secs, which is acceptable to me.Now, only one challenge remains. I want the original file to be compressed using that 90% quality but without resizing it. The idea being that that file too will take half the file size. I figured I could simply resize it to its' current dimensions, but that doesn't seem to do anything to the file or its size. Here's my code, somewhat simplified:\[code\]$sourceimage = "test.jpg";$resize_settings['image_library'] = 'gd2';$resize_settings['source_image'] = $sourceimage;$resize_settings['maintain_ratio'] = false;$resize_settings['quality'] = '90%';$this->load->library('image_lib', $resize_settings);$resize_settings['width'] = $imagefile['width'];$resize_settings['height'] = $imagefile['height'];$resize_settings['new_image'] = $filename;$this->image_lib->initialize($resize_settings);$this->image_lib->resize();\[/code\]The above code works fine for all formats except the original. I tried debugging into the CI class to see why nothing happens and I noticed that the script detects that the dimensions did not change. Next, it simply makes a copy of that file without processing it at all. I commented that piece of code to force it to resize but now still nothing happens.Does anybody know how to compress an image (any image, not just jpegs) to 90% using the CI class without changing the dimensions?
