pngj | PNGJ : pure Java library for high performance PNG encoding | Image Editing library

by leonbloy Java Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | pngj Summary

pngj is a Java library typically used in Media, Image Editing applications. pngj has no bugs, it has no vulnerabilities, it has build file available and it has low support. You can download it from GitHub.

This is a relatively low level library, its goal is to code and decode PNG images from/to raw pixels, optimizing memory usage and speed. It does not provide any high-level image processing (eg, resizing, colour conversions), it does not try to abstract the concrete PNG color model (as BufferedImage does, for example). In particular, the default format of the scanlines (as wrapped in ImageLineInt or ImageLineByte) is not abstract, the meaning of the values depends on the image color model and bitdepth.

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Quality

Security

License

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Support

pngj has a low active ecosystem.

It has 186 star(s) with 38 fork(s). There are 15 watchers for this library.

It had no major release in the last 6 months.

There are 7 open issues and 39 have been closed. On average issues are closed in 192 days. There are 3 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of pngj is current.

Quality

pngj has 0 bugs and 0 code smells.

Security

pngj has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

pngj code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

pngj does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

pngj releases are not available. You will need to build from source code and install.

Build file is available. You can build the component from source.

pngj saves you 8150 person hours of effort in developing the same functionality from scratch.

It has 16759 lines of code, 1551 functions and 173 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed pngj and discovered the below as its top functions. This is intended to give you an instant insight into pngj implemented functionality, and help decide if they suit your requirements.

This method takes a row and writes it to the band table
Initialization from newRow
Rebuilds the filters
Find the best compression ratio
Override this method
Initializes a new chunk
Creates raw text chunk
Compress byte array
Converts an inline line to RGB
Reads the entry at a specific offset in an array
Parses the raw bytes from the given chunk
Creates a chunk of the image
Creates raw text chunk
Parses from the given chunk
Processes a byte array
Reads image from raw image
Converts an image line to RGB
Creates the raw data chunk
Parses a PNG image
Writes the image in packed format
Writes a chunk of pixels
Initialize the image params
Parses a PNG chunk
Converts a line to an ARGB 32 bit array
Converts a line into an RGB array
Read image from raw image

Get all kandi verified functions for this library.

pngj Key Features

No Key Features are available at this moment for pngj.

pngj Examples and Code Snippets

No Code Snippets are available at this moment for pngj.

Community Discussions

Trending Discussions on pngj

Error inflating class com.google.android.material.navigation.NavigationView after migration to AndroidX

Rotate images without saving the whole image in memory

QUESTION

Error inflating class com.google.android.material.navigation.NavigationView after migration to AndroidX

Asked 2020-Apr-02 at 20:07

After I updated my project to AndroidX with targetSdkVersion set to 28, my project crashes on installing it from the store for beta testing.

The following is the error log I receive:

...

ANSWER

Answered 2019-Jul-08 at 09:24

android.view.InflateException: means there is something wrong in your XML file itself.

Please check all your dimensions, color resources, and other resources you have assigned in the XML tag.

Or post your XML file here.

Source https://stackoverflow.com/questions/56931348

QUESTION

Rotate images without saving the whole image in memory

Asked 2017-Apr-25 at 22:05

I'm saving a large PNG file (40000 x 3000) using PNGJ library. Now I need to rotate the image 90 degrees to the right without saving the whole image in memory. PNGJ library is limited to write images line by line, so I can't rotate each line and write the imagem column by column.

Is there any way to do that?

...

ANSWER

Answered 2017-Apr-25 at 22:05

PNGJ library is limited to write images line by line

Actually, it's the PNG format that's line-oriented. And you can't read a single pixel of a PNG image without reading all the "previous" pixels. So, I guess you are out of luck.

The best you can do, I think, if you cannot store the full image in memory, is to load and write it by K horizontal stripes. You fill the first stripe by reading the full image (you only store the fist pixels of each row, that correspond to the pixels of the first horizontal stripe of the rotated image, discarding the rest), write it, and read again the file to fill and write the second stripe, etc. This involves K readings of the original file (of course, you should make the stripe as thick as your memory permits, so as to make K small). I hope you get the idea.

You can do that with PNGJ.

Source https://stackoverflow.com/questions/43618181

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install pngj

You can download it from GitHub.
You can use pngj like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the pngj component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .