lazyBWImage - IBWImage with on-demand pixel generation. not synchronized [1027305]

< > BotCompany Repo | #1027305 // lazyBWImage - IBWImage with on-demand pixel generation. not synchronized

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

!include once #1027304 // eclipse collections

import org.eclipse.collections.impl.map.mutable.primitive.*;

static IBWImage lazyBWImage(int w, int h, IF2<Int, Int, Float> getFloatPixel) {
  ret new IBWImage {
    new IntFloatHashMap knownPixels;
    
    public int getWidth() { ret w; }
    public int getHeight() { ret h; }
    
    public float getFloatPixel(int x, int y) {
      int i = x*w+h;
      Float f = knownPixels.getIfAbsent(i, Float.NaN);
      if (!isNaN(f)) ret f;
        knownPixels.put(i, f = getFloatPixel.get(x, y));
      ret f;
    }
  };
}

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Snippet ID:

#1027305

Snippet name:

lazyBWImage - IBWImage with on-demand pixel generation. not synchronized

Eternal ID of this version:

#1027305/5

Text MD5:

505c40580f962c808d2fdb71ecd665d0

Transpilation MD5:

933e7b29940f6115c3ccedbf2279fcfc

Author:

stefan

Category:

javax / maths

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2020-03-01 11:26:31

Source code size:

584 bytes / 20 lines

Pitched / IR pitched:

No / No

Views / Downloads:

145 / 231

Version history:

4 change(s)

Referenced in:

[show references]

1	!include once #1027304 // eclipse collections
2
3	import org.eclipse.collections.impl.map.mutable.primitive.*;
4
5	static IBWImage lazyBWImage(int w, int h, IF2<Int, Int, Float> getFloatPixel) {
6	ret new IBWImage {
7	new IntFloatHashMap knownPixels;
8
9	public int getWidth() { ret w; }
10	public int getHeight() { ret h; }
11
12	public float getFloatPixel(int x, int y) {
13	int i = x*w+h;
14	Float f = knownPixels.getIfAbsent(i, Float.NaN);
15	if (!isNaN(f)) ret f;
16	knownPixels.put(i, f = getFloatPixel.get(x, y));
17	ret f;
18	}
19	};
20	}