Zig Image library

This is a work in progress library to create, process, read and write different image formats with Zig programming language.

Install & Build

This project assume current Zig master (0.7.0+a1fb10b76).

How to add to your project:

1. Clone this repository or add as a submodule
2. Add to your build.zig

exe.addPackagePath("zigimg", "zigimg/zigimg.zig");

To run the test suite, checkout the test suite and run

zig build test

Supported image formats

Image Format	Read	Write
ANIM	❌	❌
BMP	✔️ (Partial)	❌
GIF	❌	❌
ICO	❌	❌
IILBM	❌	❌
JPEG	❌	❌
PAM	❌	❌
PBM	✔️	❌
PCX	✔️	❌
PGM	✔️ (Partial)	✔️ (Partial)
PNG	✔️	❌
PPM	✔️ (Partial)	❌
TGA	✔️	❌
TIFF	❌	❌
XBM	❌	❌
XPM	❌	❌

BMP - Bitmap

• version 4 BMP
• version 5 BMP
• 24-bit RGB
• 32 RGBA
• Doesn't support any compression

PBM - Portable Bitmap format

• Everything is supported

PCX - ZSoft Picture Exchange format

• Support monochrome, 4 color, 16 color and 256 color indexed images
• Support 24-bit RGB images

PGM - Portable Graymap format

• Support 8-bit and 16-bit grayscale images
• 16-bit ascii grayscale loading not tested

PNG - Portable Network Graphics

• Support all pixel formats supported by PNG (grayscale, grayscale+alpha, indexed, truecolor, truecolor with alpha) in 8-bit or 16-bit.
• Support the mininal chunks in order to decode the image.
• Not all images in Png Test Suite is covered but should be good enough for now.

PPM - Portable Pixmap format

• Support 24-bit RGB (8-bit per channel)
• Missing 48-bit RGB (16-bit per channel)

TGA - Truevision TGA format

• Supports uncompressed and compressed 8-bit grayscale, indexed with 16-bit colormap, truecolor with 24-bit or 32-bit bit depth.