Update README.md

Author: brillcp

README.md

@@ -1,2 +1,42 @@
-A Swift wrapper for libgd, allowing for basic graphic rendering on server-side Swift where Core Graphics is not available.
-Min Swift version is `6.2.0`.
+SwiftLibgd is a Swift wrapper for libgd, providing server-side image manipulation where Core Graphics isn’t available. It allows you to:
+- Load and save PNG/JPEG images.
+- Create, resize, and crop images.
+-	Draw lines, shapes (ellipses, rectangles), and images.
+-	Read and write individual pixels.
+-	Flood fill colors.
+-	Flip images horizontally or vertically.
+-	Apply basic effects: pixelate, blur, colorize, desaturate.
+
+SwiftLibgd handles GD resources automatically, freeing memory when images are destroyed.
+
+
+## Installation
+
+1. Install the GD library on your system:
+-	macOS: Install Homebrew, then run:
+```
+brew install gd
+```
+- Linux: Run as root:
+```
+apt-get install libgd-dev
+```
+
+2.	Add SwiftLibgd to your `Package.swift`:
+```
+.package(url: "https://github.com/brillcp/swiftlibgd.git", from: "0.1.2")
+```
+
+3. Include SwiftLibgd in your target dependencies.
+SwiftLibgd has a single Swift dependency: Cgd, which wraps the underlying GD library.
+
+## Classes
+
+SwiftLibgd provides five classes for basic image operations:
+- Image – responsible for loading, saving, and manipulating image data
+- Point – stores x and y coordinates as integers
+- Size – stores width and height as integers
+- Rectangle – combines Point and Size into one value
+- Color – provides red, green, blue, and alpha components as Doubles from 0 to 1, and includes some built-in colors to get you started
+
+These are implemented as classes rather than structs because only classes have deinitializers, which are required to release GD’s memory when an image is destroyed.