me.roan.fringeremover

Class Worker

java.lang.Object

me.roan.fringeremover.Worker

public class Worker
extends java.lang.Object

Worker class responsible for processing all the files.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Worker.ProgressListener Listener that subscribes to worker progress events.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.util.List<java.nio.file.Path>	files List of files to process.
private static java.nio.file.Path	inputDir Input directory.
private static java.nio.file.Path	outputDir Output directory or file.
private static boolean	overwrite Whether to overwrite existing files.
private static java.nio.file.PathMatcher	PNG_PATTERN Path filter that only matches PNG files.
private static boolean	running Whether working threads are currently processing files.

Constructor Summary

Constructors

Constructor and Description
Worker()

Method Summary

Modifier and Type	Method and Description
private static int	computeColor(int x, int y, java.awt.image.BufferedImage data) Computes the new color of the pixel at the given coordinates given the current image color data.
static boolean	isRunning() Checks if the worker is currently running and processing files.
static int	prepare(java.nio.file.Path input, java.nio.file.Path output, boolean subdirs, boolean overwriteFiles) Prepares all the files to process based on the given input.
private static boolean	processFile(java.nio.file.Path file) Processes the given file.
private static void	processImage(java.awt.image.BufferedImage input, java.io.File output) Processes the given image and writes it to the given file.
static void	setRunning(boolean shouldRun) Sets whether the working is currently processing files.
static void	start(int threads, Worker.ProgressListener listener) Starts the worker with the give number of concurrent threads and listener to report progress updates to.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PNG_PATTERN

private static final java.nio.file.PathMatcher PNG_PATTERN

Path filter that only matches PNG files.

inputDir

private static java.nio.file.Path inputDir

Input directory.

outputDir

private static java.nio.file.Path outputDir

Output directory or file.

overwrite

private static boolean overwrite

Whether to overwrite existing files.

files

private static java.util.List<java.nio.file.Path> files

List of files to process.

running

private static volatile boolean running

Whether working threads are currently processing files.

Constructor Detail

Worker

public Worker()

Method Detail

prepare

public static final int prepare(java.nio.file.Path input,
                                java.nio.file.Path output,
                                boolean subdirs,
                                boolean overwriteFiles)
                         throws java.io.IOException

Prepares all the files to process based on the given input.

Parameters:

input - Input folder or file.

output - Output folder or file.

subdirs - Whether to parse sub-directories.

overwriteFiles - Whether to overwrite existing files.

Returns:

The number of files that were found for processing.

Throws:

java.io.IOException - When an IOException occurs.

setRunning

public static final void setRunning(boolean shouldRun)

Sets whether the working is currently processing files.

Parameters:

shouldRun - True if the worker should process files.

isRunning

public static boolean isRunning()

Checks if the worker is currently running and processing files.

Returns:

True if the worker is currently processing files.

start

public static final void start(int threads,
                               Worker.ProgressListener listener)

Starts the worker with the give number of concurrent threads and listener to report progress updates to.

Parameters:

threads - The number of concurrent threads to use.

listener - The progress listener.

processFile

private static final boolean processFile(java.nio.file.Path file)
                                  throws java.io.IOException

Processes the given file.

Parameters:

file - The file to process.

Returns:

True if the file was successfully processed, false if the file already exists and overwriting is not enabled.

Throws:

java.io.IOException - When an IOException occurs.

processImage

private static final void processImage(java.awt.image.BufferedImage input,
                                       java.io.File output)
                                throws java.io.IOException

Processes the given image and writes it to the given file.

Parameters:

input - The image to process.

output - The output file to write to.

Throws:

java.io.IOException - When an IOException occurs.

computeColor

private static final int computeColor(int x,
                                      int y,
                                      java.awt.image.BufferedImage data)

Computes the new color of the pixel at the given coordinates given the current image color data. For all opaque and semi-transparent pixels this is the current color. For all fully transparent pixels this is the average color of the (at most) 8 pixels directly surrounding the target pixel that are not fully transparent. The alpha component of the new color is kept at 0.

Parameters:

x - The x coordinate of the pixel to compute.

y - The y coordinate of the pixel to compute.

data - The original image data.

Returns:

The new color for the requested pixel.