toJPEGWithQuality [1035888]

< > BotCompany Repo | #1035888 // toJPEGWithQuality

JavaX fragment (include) [tags: use-pretranspiled]

// quality = 0 to 100
static byte[] toJPEGWithQuality(double quality, BufferedImage img) ctex {
  // need to drop alpha channel for this to work
  img = dropAlphaChannelFromBufferedImage(img);
  
  new ByteArrayOutputStream stream;
  var jpgWriter = first(ImageIO.getImageWritersByFormatName("jpg"));
  try {
    var params = jpgWriter.getDefaultWriteParam();
    params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    params.setCompressionQuality(toFloat(quality/100));
  
    jpgWriter.setOutput(new javax.imageio.stream.MemoryCacheImageOutputStream(stream));
    jpgWriter.write(null, new IIOImage(img, null, null), params);
  } finally {
    jpgWriter.dispose();
  }
  
  ret stream.toByteArray();
}

Author comment

Began life as a copy of #1007587

Travelled to 2 computer(s): mqqgnosmbjvj, wnsclhtenguj

Snippet ID:

#1035888

Snippet name:

toJPEGWithQuality

Eternal ID of this version:

#1035888/6

Text MD5:

1f1ebc67ecb888c6425d92c6c43cdfa3

Transpilation MD5:

4beac9c9eb9582a2808e260387be6a9e

Author:

stefan

Category:

javax

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2022-08-07 01:18:44

Source code size:

729 bytes / 20 lines

Pitched / IR pitched:

No / No

Views / Downloads:

442 / 562

Version history:

5 change(s)

Referenced in:

[show references]

1	// quality = 0 to 100
2	static byte[] toJPEGWithQuality(double quality, BufferedImage img) ctex {
3	// need to drop alpha channel for this to work
4	img = dropAlphaChannelFromBufferedImage(img);
5
6	new ByteArrayOutputStream stream;
7	var jpgWriter = first(ImageIO.getImageWritersByFormatName("jpg"));
8	try {
9	var params = jpgWriter.getDefaultWriteParam();
10	params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
11	params.setCompressionQuality(toFloat(quality/100));
12
13	jpgWriter.setOutput(new javax.imageio.stream.MemoryCacheImageOutputStream(stream));
14	jpgWriter.write(null, new IIOImage(img, null, null), params);
15	} finally {
16	jpgWriter.dispose();
17	}
18
19	ret stream.toByteArray();
20	}