Computer Graphics, lab 2

Brief problem statement

Create a (web) app that fetches the main info about an image for all images in a folder (containing up to 100,000 images). The following info is mandatory:

• File name
• Image size (in pixels)
• Resolution (in dpi)
• Color depth
• Compression type (when appropriate)

Results

The screenshot of the program:

The program shows the fetching time every time you open a new folder via MessageBox.

The results of the speed test (642 jpeg files, ~2.75 GB):

Requirements

• Go 1.15.3 or later (to build)
• Windows 7 or later

Installation and usage

To get the source code, clone the repository or use

go get github.com/alphaver/graphics-lab-2

To run the app use a precompiled binary lab2.exe from the bin folder.

You may also build the project manually using go build from the main folder. The preferred form of the command is

go build -i -o bin/lab2.exe -ldflags="-H windowsgui" -tags walk_use_cgo

If you choose the manual build, then due to the use of the walk package you should have the lab2.exe.manifest file in the same directory where your binary is.

For the app to work, you must also have the exiftool.exe file nearby your binary.

External tools used for the lab

• Exiftool — the Perl library (and a standalone tool) used to fetch the info about the images
• go-exiftool — a Go wrapper package for Exiftool
• walk — a Go package to create native Windows GUIs