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| java.lang.Object | |
| ↳ | android.graphics.ColorMatrix |
4x5 matrix for transforming the color and alpha components of a Bitmap. The matrix can be passed as single array, and is treated as follows:
[ a, b, c, d, e,
f, g, h, i, j,
k, l, m, n, o,
p, q, r, s, t ]
When applied to a color [R, G, B, A], the resulting color
is computed as:
R’ = a*R + b*G + c*B + d*A + e; G’ = f*R + g*G + h*B + i*A + j; B’ = k*R + l*G + m*B + n*A + o; A’ = p*R + q*G + r*B + s*A + t;
That resulting color [R’, G’, B’, A’]
then has each channel clamped to the 0 to 255
range.
The sample ColorMatrix below inverts incoming colors by scaling each
channel by -1, and then shifting the result up by
255 to remain in the standard color space.
[ -1, 0, 0, 0, 255,
0, -1, 0, 0, 255,
0, 0, -1, 0, 255,
0, 0, 0, 1, 0 ]
| Public Constructors | |||||||||||
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Create a new colormatrix initialized to identity (as if reset() had
been called).
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Create a new colormatrix initialized with the specified array of values.
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Create a new colormatrix initialized with the specified colormatrix.
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| Public Methods | |||||||||||
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Return the array of floats representing this colormatrix.
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Concat this colormatrix with the specified postmatrix.
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Concat this colormatrix with the specified prematrix.
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Set this colormatrix to identity:
[ 1 0 0 0 0 - red vector 0 1 0 0 0 - green vector 0 0 1 0 0 - blue vector 0 0 0 1 0 ] - alpha vector | |||||||||||
Assign the array of floats into this matrix, copying all of its values.
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Assign the src colormatrix into this matrix, copying all of its values.
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Set this colormatrix to the concatenation of the two specified
colormatrices, such that the resulting colormatrix has the same effect
as applying matB and then applying matA.
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Set the matrix to convert RGB to YUV
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Set the rotation on a color axis by the specified values.
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Set the matrix to affect the saturation of colors.
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Set this colormatrix to scale by the specified values.
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Set the matrix to convert from YUV to RGB
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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Create a new colormatrix initialized to identity (as if reset() had been called).
Create a new colormatrix initialized with the specified array of values.
Create a new colormatrix initialized with the specified colormatrix.
Return the array of floats representing this colormatrix.
Concat this colormatrix with the specified postmatrix.
This is logically the same as calling setConcat(postmatrix, this);
Concat this colormatrix with the specified prematrix.
This is logically the same as calling setConcat(this, prematrix);
Set this colormatrix to identity:
[ 1 0 0 0 0 - red vector 0 1 0 0 0 - green vector 0 0 1 0 0 - blue vector 0 0 0 1 0 ] - alpha vector
Assign the array of floats into this matrix, copying all of its values.
Assign the src colormatrix into this matrix, copying all of its values.
Set this colormatrix to the concatenation of the two specified colormatrices, such that the resulting colormatrix has the same effect as applying matB and then applying matA.
It is legal for either matA or matB to be the same colormatrix as this.
Set the rotation on a color axis by the specified values.
axis=0 correspond to a rotation around the RED color
axis=1 correspond to a rotation around the GREEN color
axis=2 correspond to a rotation around the BLUE color
Set the matrix to affect the saturation of colors.
| sat | A value of 0 maps the color to gray-scale. 1 is identity. |
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Set this colormatrix to scale by the specified values.