skia2/docs/SkColor_Reference.bmh

#Topic Color
#Alias Color_Reference

#Subtopic Overview
    #Subtopic Subtopic
        #Populate
    ##
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#Subtopic Define
#Populate
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#Subtopic Function
#Populate
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#Subtopic Typedef
#Populate
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    #Subtopic Alpha
        #Alias Alpha
    #Subtopic ##

    #Subtopic RGB
    #Substitute RGB
        #Subtopic Red
            #Alias Red
        #Subtopic ##
        #Subtopic Blue
            #Alias Blue
        #Subtopic ##
        #Subtopic Green
            #Alias Green
        #Subtopic ##
    #Subtopic ##

    #Subtopic ARGB
    #Substitute ARGB
    #Subtopic ##

    #Subtopic RBG
    #Substitute RBG
    #Subtopic ##

    #Subtopic RGB-565
    #Substitute RGB-565
    #Alias Color_RGB-565 # quit changing - to _ !
    #Subtopic ##

    #Subtopic Gray
    ##

# ------------------------------------------------------------------------------

#Typedef uint8_t SkAlpha

Types and macros for colors
8-bit type for an alpha value. 0xFF is 100% opaque, 0x00 is 100% transparent.

#Typedef ##

# ------------------------------------------------------------------------------

#Typedef uint32_t SkColor

32 bit ARGB color value, not premultiplied. The color components are always in
a known order. This is different from SkPMColor, which has its bytes in a configuration
dependent order, to match the format of kBGRA_8888_SkColorType bitmaps. SkColor
is the type used to specify colors in SkPaint and in gradients.

#Typedef ##

# ------------------------------------------------------------------------------

#Method static constexpr inline SkColor SkColorSetARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b)
#In Function
#Line # incomplete ##

Return a SkColor value from 8 bit component values

#Param a  incomplete ##
#Param r  incomplete ##
#Param g  incomplete ##
#Param b  incomplete ##

#Return incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Method ##

# ------------------------------------------------------------------------------

#Define SkColorSetARGBInline

#Code
###$
    #define SkColorSetARGBInline SkColorSetARGB
$$$#
##

Legacy aliases.

#NoExample
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SkColorSetARGBMacro

#Code
###$
    #define SkColorSetARGBMacro  SkColorSetARGB
$$$#
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#NoExample
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SkColorSetRGB
#Line # incomplete ##

#Code
###$
    #define SkColorSetRGB(r, g, b)  SkColorSetARGB(0xFF, r, g, b)
$$$#
##

Return a SkColor value from 8 bit component values, with an implied value
of 0xFF for alpha (fully opaque)

#Param r incomplete ##
#Param g incomplete ##
#Param b incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SkColorGetA
#Line # incomplete ##

#Code
###$
    #define SkColorGetA(color)      (((color) >> 24) & 0xFF)
$$$#
##

return the alpha byte from a SkColor value

#Param color incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SkColorGetR
#Line # incomplete ##

#Code
###$
    #define SkColorGetR(color)      (((color) >> 16) & 0xFF)
$$$#
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return the red byte from a SkColor value

#Param color incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SkColorGetG
#Line # incomplete ##

#Code
###$
    #define SkColorGetG(color)      (((color) >>  8) & 0xFF)
$$$#
##

return the green byte from a SkColor value

#Param color incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SkColorGetB
#Line # incomplete ##

#Code
###$
    #define SkColorGetB(color)      (((color) >>  0) & 0xFF)
$$$#
##

return the blue byte from a SkColor value

#Param color incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Method static constexpr inline SkColor SkColorSetA(SkColor c, U8CPU a)
#In Function
#Line # incomplete ##

#Param c  incomplete ##
#Param a  incomplete ##

#Return incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Method ##

# ------------------------------------------------------------------------------

#Define SK_AlphaTRANSPARENT

#Code
###$
    #define SK_AlphaTRANSPARENT static_cast<SkAlpha>(0x00)
$$$#
##

common colors
transparent SkAlpha value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_AlphaOPAQUE

#Code
###$
    #define SK_AlphaOPAQUE      static_cast<SkAlpha>(0xFF)
$$$#
##

opaque SkAlpha value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorTRANSPARENT

#Code
###$
    #define SK_ColorTRANSPARENT static_cast<SkColor>(0x00000000)
$$$#
##

transparent SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorBLACK

#Code
###$
    #define SK_ColorBLACK       static_cast<SkColor>(0xFF000000)
$$$#
##

black SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorDKGRAY

#Code
###$
    #define SK_ColorDKGRAY      static_cast<SkColor>(0xFF444444)
$$$#
##

dark gray SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorGRAY

#Code
###$
    #define SK_ColorGRAY        static_cast<SkColor>(0xFF888888)
$$$#
##

gray SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorLTGRAY

#Code
###$
    #define SK_ColorLTGRAY      static_cast<SkColor>(0xFFCCCCCC)
$$$#
##

light gray SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorWHITE

#Code
###$
    #define SK_ColorWHITE       static_cast<SkColor>(0xFFFFFFFF)
$$$#
##

white SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorRED

#Code
###$
    #define SK_ColorRED         static_cast<SkColor>(0xFFFF0000)
$$$#
##

red SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorGREEN

#Code
###$
    #define SK_ColorGREEN       static_cast<SkColor>(0xFF00FF00)
$$$#
##

green SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorBLUE

#Code
###$
    #define SK_ColorBLUE        static_cast<SkColor>(0xFF0000FF)
$$$#
##

blue SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorYELLOW

#Code
###$
    #define SK_ColorYELLOW      static_cast<SkColor>(0xFFFFFF00)
$$$#
##

yellow SkColor value

#Example
// incomplete
##

#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorCYAN

#Code
###$
    #define SK_ColorCYAN        static_cast<SkColor>(0xFF00FFFF)
$$$#
##

cyan SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Define SK_ColorMAGENTA

#Code
###$
    #define SK_ColorMAGENTA     static_cast<SkColor>(0xFFFF00FF)
$$$#
##

magenta SkColor value

#Example
// incomplete
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#SeeAlso incomplete

#Define ##

# ------------------------------------------------------------------------------

#Subtopic HSV

#Subtopic Hue
Hue represents an angle, in degrees, on a color wheel. Hue has a positive value
modulo 360, where zero degrees is red.
##

#Subtopic Saturation
##

#Subtopic Value
##

#Method SK_API void SkRGBToHSV(U8CPU red, U8CPU green, U8CPU blue, SkScalar hsv[3])
#In Function
#Line # incomplete ##

Convert RGB components to HSV.
hsv[0] is Hue [0 .. 360)
hsv[1] is Saturation [0...1]
hsv[2] is Value [0...1]

#Param red  red component value [0..255]
##
#Param green  green component value [0..255]
##
#Param blue  blue component value [0..255]
##
#Param hsv  3 element array which holds the resulting HSV components.
##

#Return incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Method ##

# ------------------------------------------------------------------------------

#Method static inline void SkColorToHSV(SkColor color, SkScalar hsv[3])
#In Function
#Line # incomplete ##

Convert the argb color to its HSV components.
hsv[0] represents Hue, and is assigned a value from zero to less than 360.
hsv[1] is Saturation [0...1]
hsv[2] is Value [0...1]

#Param color  the argb color to convert. Note: the alpha component is ignored.
##
#Param hsv  3 element array which holds the resulting HSV components.
##

#Return incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Method ##

# ------------------------------------------------------------------------------

#Method SK_API SkColor SkHSVToColor(U8CPU alpha, const SkScalar hsv[3])
#In Function
#Line # incomplete ##

Convert HSV components to an ARGB color. The alpha component is passed through unchanged.
hsv[0] represents Hue, an angle from zero to less than 360.
hsv[1] represents Saturation, and varies from zero to one.
hsv[2] represents Value, and varies from zero to one.

If hsv values are out of range, they are pinned.

#Param alpha  the alpha component of the returned argb color.
##
#Param hsv  3 element array which holds the input HSV components.
##

#Return  the resulting argb color
##

#Example
// incomplete
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#SeeAlso incomplete

#Method ##

# ------------------------------------------------------------------------------

#Method static inline SkColor SkHSVToColor(const SkScalar hsv[3])
#In Function
#Line # incomplete ##

Convert HSV components to an ARGB color. The alpha component set to 0xFF.
hsv[0] represents Hue, an angle from zero to less than 360.
hsv[1] represents Saturation, and varies from zero to one.
hsv[2] represents Value, and varies from zero to one.

If hsv values are out of range, they are pinned.

#Param hsv  3 element array which holds the input HSV components.
##

#Return  the resulting argb color
##

#Example
// incomplete
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#SeeAlso incomplete

#Method ##

#Subtopic HSV ##

# ------------------------------------------------------------------------------

#Typedef uint32_t SkPMColor

32 bit ARGB color value, premultiplied. The byte order for this value is
configuration dependent, matching the format of kBGRA_8888_SkColorType bitmaps.
This is different from SkColor, which is nonpremultiplied, and is always in the
same byte order.

#Typedef ##

# ------------------------------------------------------------------------------

#Method SK_API SkPMColor SkPreMultiplyARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b)
#In Function
#Line # incomplete ##

Return a SkPMColor value from unpremultiplied 8 bit component values

#Param a  incomplete ##
#Param r  incomplete ##
#Param g  incomplete ##
#Param b  incomplete ##

#Return incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Method ##

# ------------------------------------------------------------------------------

#Method SK_API SkPMColor SkPreMultiplyColor(SkColor c)
#In Function
#Line # incomplete ##

Return a SkPMColor value from a SkColor value. This is done by multiplying the color
components by the color's alpha, and by arranging the bytes in a configuration
dependent order, to match the format of kBGRA_8888_SkColorType bitmaps.

#Param c  incomplete ##

#Return incomplete ##

#Example
// incomplete
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#SeeAlso incomplete

#Method ##

#Topic Color ##