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ColorFilter matrix docs #13100

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dnfield merged 2 commits into from
Oct 11, 2019
Merged

ColorFilter matrix docs #13100

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e771d93
update docs
dnfield Oct 11, 2019
f536bb1
force markdown to text
dnfield Oct 11, 2019
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10 changes: 6 additions & 4 deletions lib/ui/painting.dart
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Expand Up @@ -2493,16 +2493,18 @@ class ColorFilter {
_matrix = null,
_type = _TypeMode;

/// Construct a color filter that transforms a color by a 4x5 matrix.
/// Construct a color filter that transforms a color by a 5x5 matrix, where
/// the fifth row is implicitly added in an identity configuration.
///
/// Every pixel's color value, repsented as an `[R, G, B, A]`, is matrix
/// multiplied to create a new color:
///
/// ```
/// ```text
/// | R' | | a00 a01 a02 a03 a04 | | R |
/// | G' | = | a10 a11 a22 a33 a44 | * | G |
/// | B' | | a20 a21 a22 a33 a44 | | B |
/// | G' | | a10 a11 a22 a33 a44 | | G |
/// | B' | = | a20 a21 a22 a33 a44 | * | B |
/// | A' | | a30 a31 a22 a33 a44 | | A |
/// | 1 | | 0 0 0 0 1 | | 1 |
/// ```
///
/// The matrix is in row-major order and the translation column is specified
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