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* Color matrix defines for filters and identity (#80320) This PR converts the procs `color_matrix_identity`, `color_matrix_lightness` and `color_matrix_contrast` into defines/macros. Also adds in defines for common color matrix filters. I don't like how `color_matrix_identity` is a one-line proc with no arg. Also these help people identify the sort of color matrix filter is being used. * Color matrix defines for filters and identity --------- Co-authored-by: Ghom <42542238+Ghommie@users.noreply.github.com>
28 lines
1.5 KiB
Plaintext
28 lines
1.5 KiB
Plaintext
/// Helper macro for creating a matrix at the given offsets.
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/// Works at compile time.
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#define TRANSLATE_MATRIX(offset_x, offset_y) matrix(1, 0, (offset_x), 0, 1, (offset_y))
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/// The color matrix of an image which colors haven't been altered. Does nothing.
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#define COLOR_MATRIX_IDENTITY list(1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1, 0,0,0,0)
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/// Color inversion
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#define COLOR_MATRIX_INVERT list(-1,0,0,0, 0,-1,0,0, 0,0,-1,0, 0,0,0,1, 1,1,1,0)
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///Sepiatone
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#define COLOR_MATRIX_SEPIATONE list(0.393,0.349,0.272,0, 0.769,0.686,0.534,0, 0.189,0.168,0.131,0, 0,0,0,1, 0,0,0,0)
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///Grayscale
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#define COLOR_MATRIX_GRAYSCALE list(0.33,0.33,0.33,0, 0.59,0.59,0.59,0, 0.11,0.11,0.11,0, 0,0,0,1, 0,0,0,0)
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///Polaroid colors
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#define COLOR_MATRIX_POLAROID list(1.438,-0.062,-0.062,0, -0.122,1.378,-0.122,0, -0.016,-0.016,1.483,0, 0,0,0,1, 0,0,0,0)
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/// Converts reds to blue, green to red and blue to green.
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#define COLOR_MATRIX_BRG list(0,0,1,0, 0,1,0,0, 1,0,0,0, 0,0,0,1, 0,0,0,0)
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/// Black & White
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#define COLOR_MATRIX_BLACK_WHITE list(1.5,1.5,1.5,0, 1.5,1.5,1.5,0, 1.5,1.5,1.5,0, 0,0,0,1, -1,-1,-1,0)
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/**
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* Adds/subtracts overall lightness
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* 0 is identity, 1 makes everything white, -1 makes everything black
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*/
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#define COLOR_MATRIX_LIGHTNESS(power) list(1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1, power,power,power,0)
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/**
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* Changes distance colors have from rgb(127,127,127) grey
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* 1 is identity. 0 makes everything grey >1 blows out colors and greys
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*/
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#define COLOR_MATRIX_CONTRAST(val) list(val,0,0,0, 0,val,0,0, 0,0,val,0, 0,0,0,1, (1-val)*0.5,(1-val)*0.5,(1-val)*0.5,0)
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