uk.ac.starlink.ttools.plot2.paper

Interface Compositor.Buffer

Enclosing class:

Compositor

public static interface Compositor.Buffer

Buffer of pixels on which compositing operations can be performed.

Method Summary

Modifier and Type	Method and Description
boolean	addSample(int index, float r, float g, float b, float alpha) Adds an RGBA sample to one pixel, using separate float scalars.
boolean	addSample(int index, int rgba) Adds an RGBA sample to one pixel, using an RGBA integer.
boolean	addSample(int index, int rgb, float alpha) Adds an RGBA sample to one pixel, using an RGB integer and separate float value.
void	clear() Clears all samples from this buffer.
int	toRgbInt(int index) Returns the result of compositing all the added samples as a non-premultiplied ARGB integer.

Method Detail

clear

void clear()

Clears all samples from this buffer.

addSample

boolean addSample(int index,
                  float r,
                  float g,
                  float b,
                  float alpha)

Adds an RGBA sample to one pixel, using separate float scalars.

Parameters:

index - pixel index

r - red value, 0-1

g - green value, 0-1

b - blue value, 0-1

alpha - alpha value, 0-1

Returns:

true if saturation has been reached, that is further samples added to this pixel will have no effect

addSample

boolean addSample(int index,
                  int rgb,
                  float alpha)

Adds an RGBA sample to one pixel, using an RGB integer and separate float value.

Parameters:

index - pixel index

rgb - integer containing RGB in lower 24 bits; highest byte is ignored

alpha - alpha value, 0-1

Returns:

true if saturation has been reached, that is further samples added to this pixel will have no effect

addSample

boolean addSample(int index,
                  int rgba)

Adds an RGBA sample to one pixel, using an RGBA integer.

Parameters:

index - pixel index

rgba - integer containing RGBA values one per byte

Returns:

true if saturation has been reached, that is further samples added to this pixel will have no effect

toRgbInt

int toRgbInt(int index)

Returns the result of compositing all the added samples as a non-premultiplied ARGB integer. This is suitable for use with BufferedImage setRGB methods) or, more efficiently, an RgbImage buffer.

Parameters:

index - pixel index

Returns:

ARGB integer