HashBWImage - makes a 64 bit hash of an BWImage (compatible with HashBufferedImage) [1034815]

< > BotCompany Repo | #1034815 // HashBWImage - makes a 64 bit hash of an BWImage (compatible with HashBufferedImage)

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

srecord noeq HashBWImage(BWImage img) {
  long hash;
  
  long get() {
    if (img == null) ret hash;
    
    int w = img.getWidth(), h = img.getHeight();
    int n = w*h;
    byte[] pixels = img.pixels;

    addToHash(w);
    addToHash(h);
    
    for i to n:
      addToHash(0xFF000000 | rgbIntFromGrayscale(ubyteToInt(pixels[i])));

    ret hash;
  }
  
  void addToHash(long x) {
    hash = boostHashCombine64(hash, x);
    printVars ifdef HashBWImage_debug(x := longToHex(x), +hash);
  }
}

Author comment

Began life as a copy of #1034798

Travelled to 4 computer(s): bhatertpkbcr, ekrmjmnbrukm, mowyntqkapby, mqqgnosmbjvj

Snippet ID:

#1034815

Snippet name:

HashBWImage - makes a 64 bit hash of an BWImage (compatible with HashBufferedImage)

Eternal ID of this version:

#1034815/7

Text MD5:

b878e2b6f75e654bd7f9cfbb03000f13

Transpilation MD5:

6289a0d9c3100f31ca6ae4558e9f0cf9

Author:

stefan

Category:

javax / imaging

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2022-03-10 22:57:47

Source code size:

519 bytes / 24 lines

Pitched / IR pitched:

No / No

Views / Downloads:

648 / 756

Version history:

6 change(s)

Referenced in:

[show references]

1	srecord noeq HashBWImage(BWImage img) {
2	long hash;
3
4	long get() {
5	if (img == null) ret hash;
6
7	int w = img.getWidth(), h = img.getHeight();
8	int n = w*h;
9	byte[] pixels = img.pixels;
10
11	addToHash(w);
12	addToHash(h);
13
14	for i to n:
15	addToHash(0xFF000000 \| rgbIntFromGrayscale(ubyteToInt(pixels[i])));
16
17	ret hash;
18	}
19
20	void addToHash(long x) {
21	hash = boostHashCombine64(hash, x);
22	printVars ifdef HashBWImage_debug(x := longToHex(x), +hash);
23	}
24	}