RGBfromHSV method (Main Control)
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Builder Syntax |
unsigned __fastcall RGBfromHSV (short nH, short nS, short nV); |
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Delphi Syntax |
Function RGBfromHSV (nH: short; nS: short; nV: short): TColorRef; |
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Overview |
Refer to Changing Brightness and Contrast. |
Remarks
Returns a COLORREF that is equivalent to the color represented by the HSV values. Each HSV value ranges from 0..255. Traditionally, hue ranges from 0 to 359. For HSV_HfromRGB, the range of 0 to 359 is remapped to a range of 0..255. For example,
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Color |
Hue (0..359) |
Hue (0..255) |
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Red |
0 |
0 |
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Green |
120 |
85 |
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Blue |
240 |
170 |
Saturation entries range from 0 to 255 where
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0: |
Contains the "most" white |
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255 |
Contains no white |
Value entries range from 0 to 255 where
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0: |
Contains the "most" black |
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255 |
Contains the least black |
The standard Windows values for COLORREF represent either red, green, and blue color values, or an index into the bitmap's palette. A COLORREF value with the format $00BBGGRR represents the blue, green, and red color values for the specified pixel, where $BB is the blue value, $GG is the green value and $RR is the red value. If $01000000 is set in the COLORREF value ($010000ZZ), the lower 8 bits ($ZZ) represent an index into the bitmap's palette, which holds the color value. You can specify a COLORREF value (the return value of the RGB function), or you can specify a palette index as explained in Using Palette Indexes As Color Values. Please note that just because an image has a palette that does not mean the value returned by this property is a palette index.
See Also
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Elements: |
HSV_HfromRGB method, HSV_SfromRGB method, HSV_VfromRGB method |
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Topics: |
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