PnmDecoder

java.lang.Object

org.ngengine.stbimage.PnmDecoder

All Implemented Interfaces:: StbDecoder

public class PnmDecoder extends Object implements StbDecoder

PNM decoder for PPM/PGM (binary), including 16-bit.

Constructor Summary

Constructors

Constructor

Description

PnmDecoder(ByteBuffer buffer, IntFunction<ByteBuffer> allocator, boolean flipVertically)

Creates a PNM decoder instance.
Method Summary

Modifier and Type

Method

Description

IntFunction<ByteBuffer>

getAllocator()

Returns the allocator used by this decoder for output buffers.

StbImageInfo

info()

Reads image metadata without fully decoding pixel data.

static boolean

isPnm(ByteBuffer buffer)

Tests whether the source starts with a supported PNM magic value.

StbImageResult

load(int desiredChannels)

Decodes image pixels.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.ngengine.stbimage.StbDecoder
load16, loadAllFrames, loadf, loadNextFrame

Constructor Details
- PnmDecoder
  
  public PnmDecoder(ByteBuffer buffer, IntFunction<ByteBuffer> allocator, boolean flipVertically)
  
  Creates a PNM decoder instance.
  
  Parameters:
  
  buffer - source data
  
  allocator - output allocator
  
  flipVertically - true to vertically flip decoded output
Method Details
- isPnm
  
  public static boolean isPnm(ByteBuffer buffer)
  
  Tests whether the source starts with a supported PNM magic value.
  
  Parameters:
  
  buffer - source bytes
  
  Returns:
  
  true when signature is a supported PNM variant
- getAllocator
  
  public IntFunction<ByteBuffer> getAllocator()
  
  Returns the allocator used by this decoder for output buffers.
  
  Specified by:
  
  getAllocator in interface StbDecoder
  
  Returns:
  
  allocator function
- info
  
  public StbImageInfo info()
  
  Reads image metadata without fully decoding pixel data.
  
  Specified by:
  
  info in interface StbDecoder
  
  Returns:
  
  image information
- load
  
  public StbImageResult load(int desiredChannels)
  
  Decodes image pixels.
  
  Specified by:
  
  load in interface StbDecoder
  
  Parameters:
  
  desiredChannels - requested output channels (0 keeps source/default behavior)
  
  Returns:
  
  decoded image result