xgif

Documentation

Overview

xgif is a helper package to create GIF animations based on PNG images The resulting animations have the following properties: 1. All frames have the same size (max(pngs.width), max(pngs.height)) 2. All PNGs are centered in the given frame 3. The frame background is plain white Note that to convert from a PNG to a GIF compatible image (Bitmap), the PNG image must be quantized (colors are aggregated in median buckets) so that it has at most 255 colors. This is required because GIFs support only 256 colors and we must keep 1 slot for the white background.

Index

• Constants
• Variables
• func AnimatePNGs(pngs [][]byte, animIntervalMs int) ([]byte, error)
• func ConvertAnimatedSVGToPNGs(browser playwright.Browser, svg []byte, durationMs int) ([][]byte, error)
• func Validate(gifBytes []byte, nFrames int, intervalMS int) error

Constants

const INFINITE_LOOP = 0

Variables

var BG_COLOR = color.White

Functions

func AnimatePNGs

func AnimatePNGs(pngs [][]byte, animIntervalMs int) ([]byte, error)

func ConvertAnimatedSVGToPNGs

func ConvertAnimatedSVGToPNGs(browser playwright.Browser, svg []byte, durationMs int) ([][]byte, error)

func Validate

func Validate(gifBytes []byte, nFrames int, intervalMS int) error

Validate checks the frame count, loop behavior, dimensions, and interval of gifBytes.

Deprecated: Validate is a test-only helper specific to D2's output and will be removed after one compatibility release. Downstream tests should decode the GIF and validate the properties they rely on directly.