Load image file into int[]
Hi. I want to load an image. I would like support for png, jpeg, webp, bmp, and (if possible) gif. I found a good source for png (http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html), but nothing for the others. I don't want to use ImageIO then read from the buffered image, as that is slow. What I am asking for is how the bits of each type are laid out, so I can construct my own image loader. Also, the int[] is a flattened image, with the index of x and y being x + y * width. I am making my own window and game library, and don't want to use the stupidly slow java awt or java swing utilities. Please help.
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If you write your own mechanism, it will likely be slower than
ImageIO in most cases.Stack Overflow
ImageIO.read(...) - It is very slow, is there a better way?
I am loading tons of icons that are going to be used in my application. I plan to load all of them from the jar on server startup. However, with hundreds of images adding up to just over 9MB, it is...
Also make sure you are using the latest Java version
JVM Gaming
Fastest Way to Load an Image?
I hate to make a blanket statement, but the default ImageIO stuff is notoriously slow. It’s only there because it’s a lot more convenient and clean to use. If you are just after loading PNG’s, Matthias posted up some custom code for loading those really quickly. Ask him about it. Jon
or you could try one of the libraries here: https://www.baeldung.com/java-images
Baeldung
Working with Images in Java | Baeldung
A quick overview of several Java image-processing libraries, including a simple example done in all of them
And if you are using something like LibGDX, use the APIs of that
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