ilp_file_codec

Description:

ilp file codec

Image Layers Package(.ilp) file codec #

Features #
This package is the .ilp file codec.
Work flows #

Use the Photoshop plugin to export the config.json and some
images
files.
Use ILP encoder encode the config.json to .ilp file.
Use ILP decoder decode the .ilp file to data.

The .ilp file structure #



Part
Range
Length
Bytes Content
Gzip
Desc




A
0 ~ 3
4
[0x49, 0x4c, 0x50, 0x21]

Fixed file strings. convert to utf8 is: ILP!


B
4 ~ 7
4
int32 value

Protobuf ILPHeader bytes length


C
8 ~ 8+C
Part B int value
Protobuf ILPHeader bytes
✔
Check out protobuf


D
8+C+1 ~ dynamic
dynamic
Protobuf ILPInfo(List) bytes
✔
Check out protobuf


E
dynamic ~ end
dynamic
Protobuf ILPLayer(List) bytes
✔
Check out protobuf



Usage #
Check out the test/ilp_codec_test.dart file.
Exception Codes #



Entity
Code
Content




ILP
ilp_file_not_exists
ilp file not exists



ilp_file_parse_error
decoder can't parse the ilp file content


ILPInfoConfig
info_file_not_exists
info config file not exists



info_file_not_string_file
info config file not a string file



info_file_parse_error
info file content can not parse to json data



info_missing_width
missing the width field



info_missing_height
missing the height field



info_missing_cover
missing the cover field



info_cover_not_exists
cover file not exists



info_missing_layers
missing the layers field


ILPLayerConfig
layer_no_file
when get the layer group id will throw this exception



layer_missing_width
missing the width field



layer_missing_height
missing the height field



layer_missing_x
missing the x field



layer_missing_y
missing the y field



layer_missing_file
missing the file field



layer_file_not_exists
layer file not exists



Before run the test #


Requirement: Open test.psd and use the Photoshop plugin export the files to the test folder.


Optional: Run the command to generate protobuf dart side code:
cd ./ilp_codec
protoc -I .\protobuf --dart_out=.\lib\protobuf .\protobuf\*.proto
copied to clipboard


License #