niblitlvl50 / spritebaker

Image baker tool, feed it a couple of images and it will output one image.

Sprite Baker

A simple tool for baking a bunch of images into one larger image. Will write a sprite atlas and a json file that tells you where the sub images are.

Usage

spritebaker -width 512 -height 512 -input [image1.png image1.png ...] -output sprite_atlas.png

Arguments

Required

-width		Output image width.
-height		Output image height.
-input		A list of input images that will be packed into the output image.
-output		The output image file name.

Optional

-bg_color       Red, green, blue, alpha channel color values for the background. Range 0 - 255.
-padding        Padding around each sub image in pixels.
-trim_images    Trim fully transparent pixels in the input images.
-sprite_format  Output special sprite format. 

Example

Here's two outputs from the tool. The first one is 650 x 650 without trimming and the second one is 512 x 512 with trimming.

• Link to json file
• Link to trimmed json file

Implementation

This tools is build using nothings stb libraries, image reader/writer library as well as the rect packing library. For reading and writing json files nlohmann's json library is used.