Get Pixel Color

[Dirzei]

Hi, I am a bit puzzled. How exactly can I get the pixel color back from an image?
The getPixel method give me a long value, but it seems it is not the same if I would use BufferedImage?

Would it be possible to include a getPixelColor Method in your code?

Thank you - cheers

[nayuki]

The getPixel method give me a long value

Please read the Javadoc to understand how it works:

Returns the channel sample values of the pixel at the specified coordinates. The top left corner
has the coordinates (0, 0), positive {code x} is right, and positive {code y} is down. The returned
value equals {code (red << 48 | green << 32 | blue << 16 | alpha << 0)}, where {code red} is in
the range [0, 2^bitDepths[0]), etc. This is still valid when {code bitDepths[3]} = 0.

PNG-library/src/io/nayuki/png/image/RgbaImage.java

Lines 45 to 55 in cc2d53b

	/**
	* Returns the channel sample values of the pixel at the specified coordinates. The top left corner
	* has the coordinates (0, 0), positive {@code x} is right, and positive {@code y} is down. The returned
	* value equals {@code (red << 48 | green << 32 | blue << 16 | alpha << 0)}, where {@code red} is in
	* the range [0, 2<sup>bitDepths[0]</sup>), etc. This is still valid when {@code bitDepths[3]} = 0.
	* @param x the <var>x</var> coordinate of the pixel to get, in the range [0, {@code getWidth()})
	* @param y the <var>y</var> coordinate of the pixel to get, in the range [0, {@code getHeight()})
	* @return the channel sample values of the pixel
	* @throws IndexOutOfBoundsException if the (<var>x</var>, <var>y</var>) coordinates are out of bounds
	*/
	public long getPixel(int x, int y);

The getPixel method give me a long value, but it seems it is not the same if I would use BufferedImage?

The method java.awt.BufferedImage.getRGB() returns a 32-bit ARGB value, and cannot support 16 bits per channel.

Would it be possible to include a getPixelColor Method in your code?

Unclear what you mean by this, because getPixel explicitly returns the color already.