BitmapRegionDecoder Class Reference

Сlass is used for getting bitmaps (png, jpg, svg) from byte array. More...

Inherits Finalizable.

Public Member Functions
ImageWrapper	decodeRegion (Rectangle rect, double sampleSize)
	Method is used to decode rectangle region in the image specified by rect.

Static Public Member Functions
static BitmapRegionDecoder	newInstance (Uint8List data)
	Method is used to create instance of BitmapRegionDecoder.

Detailed Description

Сlass is used for getting bitmaps (png, jpg, svg) from byte array.

Definition at line 20 of file bitmap_region_decoder.dart.

Member Function Documentation

decodeRegion()

ImageWrapper BitmapRegionDecoder.decodeRegion	(	Rectangle	rect,
		double	sampleSize )

Method is used to decode rectangle region in the image specified by rect.

Parameters

rect	area to render Rectangle
sampleSize	if set to a value > 1, requests the decoder to subsample the original image, returning a smaller image to save memory.

Returns

constructed bitmap

Dart code snippet:

    // Decode region with sample size 1 (full resolution)
    ImageWrapper decodedImage = _decoder!.decodeRegion(sampleRect, 1);
    print(
      "Decoded region: ${sampleRect.width}x${sampleRect.height} at sample size 1",
    );

newInstance()

static BitmapRegionDecoder BitmapRegionDecoder.newInstance ( Uint8List data )

static

Method is used to create instance of BitmapRegionDecoder.

Parameters

data	raw image data (could be raw svg string)

Returns

nstance of decoder, which could be used for decoding byte array to bitmap.

Dart code snippet:

    // Create new instance of BitmapRegionDecoder
    _decoder = BitmapRegionDecoder.newInstance(_imageData!);
    print("Created BitmapRegionDecoder instance");

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The documentation for this class was generated from the following file:

• bitmap_region_decoder.dart