The Rgb24toRgb15 function will covert a packed 24bit RGB colour value to a 15bit (555) RGB colour value.
FACTS:
* The input colour must be in the form. $--RRGGBB
* The function will convert the colour to a 16bit (rrrrrgggggbbbbb 555) format.
* Converting between 24bit and 15Bit means some colour information is lost.
Mini Tutorial:
Show some examples
; Convert some 24bit RGB colour to 15 and 16 bit format
Show_Converted_16bit_Colour(RGB(255,255,255))
Show_Converted_15bit_Colour(RGB(255,255,255))
Show_Converted_16bit_Colour(RGB(255,0,0))
Show_Converted_15bit_Colour(RGB(255,0,0))
Show_Converted_16bit_Colour(RGB(0,255,0))
Show_Converted_15bit_Colour(RGB(0,255,0))
Show_Converted_16bit_Colour(RGB(0,0,255))
Show_Converted_15bit_Colour(RGB(0,0,255))
Sync
WaitKey
Function Show_Converted_16bit_Colour(ThisRGB)
Print "16Bit"
; Print the Colour Value in Hex$
Print Hex$(ThisRgb)
; Convert the 24bit colour to a 16bit equivalent
; Note: some of the lower bits of the colour will
; be lose during the conversion !!
NewCol_16Bit = RGB24ToRGB16(ThisRgb)
; Print the Colour Value in Hex$
Print Hex$(NewCol_16Bit)
; Now Convert the 16 bit colour back to 24 bit
NewCol_24Bit = RGB16ToRGB24( NewCol_16Bit)
Print Hex$(NewCol_24Bit)
Print ""
EndFunction
Function Show_Converted_15bit_Colour(ThisRGB)
Print "15Bit"
; Print the Colour Value in Hex$
Print Hex$(ThisRgb)
; Convert the 24bit colour to a 15bit equivalent
; Note: some of the lower bits of the colour will
; be lose during the conversion !!
NewCol_15Bit = RGB24ToRGB15(ThisRgb)
; Print the Colour Value in Hex$
Print Hex$(NewCol_15Bit)
; Now Convert the 16 bit colour back to 24 bit
NewCol_24Bit = RGB15ToRGB24( NewCol_15Bit)
Print Hex$(NewCol_24Bit)
Print ""
EndFunction
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This example would output.
16Bit
$00FFFFFF
$0000FFFF
$00F8FCF8
15Bit
$00FFFFFF
$00007FFF
$00F8F8F8
16Bit
$00FF0000
$0000F800
$00F80000
15Bit
$00FF0000
$00007C00
$00F80000
16Bit
$0000FF00
$000007E0
$0000FC00
15Bit
$0000FF00
$000003E0
$0000F800
16Bit
$000000FF
$0000001F
$000000F8
15Bit
$000000FF
$0000001F
$000000F8
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