HEX$ 32 Bit Values: Difference between revisions

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* So expanding on the principle above allows us to easily make up our own hex color values:
* So expanding on the principle above allows us to easily make up our own hex color values:


:: _PALETTECOLOR 1, '''&HFF{{text|FF|red}}{{text|00|green}}{{text|00|blue}}''' 'COLOR 1 is full red
:: _PALETTECOLOR 1, '''&HFF{{Text|FF|red}}{{Text|00|green}}{{Text|00|blue}}''' 'COLOR 1 is full red
:: _PALETTECOLOR 2, '''&HFF{{text|FF|red}}{{text|00|green}}{{text|FF|blue}}''' 'COLOR 2 is purple
:: _PALETTECOLOR 2, '''&HFF{{Text|FF|red}}{{Text|00|green}}{{Text|FF|blue}}''' 'COLOR 2 is purple
:: _PALETTECOLOR 3, '''&HFF{{text|FF|red}}{{text|FF|green}}{{text|00|blur}}''' 'COLOR 3 is brown
:: _PALETTECOLOR 3, '''&HFF{{Text|FF|red}}{{Text|FF|green}}{{Text|00|blur}}''' 'COLOR 3 is brown


:Where '''FF''' is the fully opaque [[_ALPHA]] and the 3 hex color values can range from '''00''' to '''FF''' (0 to 255) each.
:Where '''FF''' is the fully opaque [[_ALPHA]] and the 3 hex color values can range from '''00''' to '''FF''' (0 to 255) each.




''Example:'' Converting the color port RGB intensity palette values 0 to 63 to 32 bit hexadecimal [[STRING|string]] values.  
''Example:'' Converting the color port RGB intensity palette values 0 to 63 to 32 bit hexadecimal [[STRING|string]] values.
{{CodeStart}}
{{CodeStart}}
{{Cl|SCREEN}} 12
{{Cl|SCREEN}} 12
Line 50: Line 50:
   {{Cl|COLOR}} i
   {{Cl|COLOR}} i
   {{Cl|PRINT}} "COLOR" + {{Cl|STR$}}(i) + " = " + hex32$(i) 'returns closest attribute
   {{Cl|PRINT}} "COLOR" + {{Cl|STR$}}(i) + " = " + hex32$(i) 'returns closest attribute
{{Cl|NEXT}} '' ''
{{Cl|NEXT}}
{{CodeEnd}}{{small|Code by Ted Weissgerber}}
{{CodeEnd}}
{{Small|Code by Ted Weissgerber}}
:''Explanation:'' [[VAL]] is used to convert the [[HEX$|hexadecimal]] [[STRING|string]] values to valid 32 bit color values for [[_PALETTECOLOR]].
:''Explanation:'' [[VAL]] is used to convert the [[HEX$|hexadecimal]] [[STRING|string]] values to valid 32 bit color values for [[_PALETTECOLOR]].
:: No VAL conversion is necessary if the [[LONG]] [[&H]] hexadecimal values are entered into the program directly by the programmer.
:: No VAL conversion is necessary if the [[LONG]] [[&H]] hexadecimal values are entered into the program directly by the programmer.




''See also:''
{{PageSeeAlso}}
* [[_PALETTECOLOR]]
* [[_PALETTECOLOR]]
* [[_RGB32]], [[_RGBA32]]
* [[_RGB32]], [[_RGBA32]]
* [[_RGB]], [[_RGBA]] {{text|(when used in 32 bit only)}}
* [[_RGB]], [[_RGBA]] {{Text|(when used in 32 bit only)}}
* [[COLOR]], [[SCREEN]], [[POINT]]
* [[COLOR]], [[SCREEN]], [[POINT]]
* [https://en.wikipedia.org/wiki/Web_colors#Basic_colors HTML Color Table HEX Values and Names]
* [[Wikipedia:Web colors#HTML_color_names|HTML Color Table HEX Values and Names]]




{{PageNavigation}}
{{PageNavigation}}

Latest revision as of 16:30, 14 June 2024

LONG Hexadecimal values can be used to set a _PALETTECOLOR instead of using _RGB32 or _RGBA32 values.


  • Hexadecimal digits can be represented as any number or letter up to F: 0 1 2 3 4 5 6 7 8 9 A B C D E F
  • Byte values up to 255 can represented by two hexadecimal digits such as 1C, 23, FA, etc.
  • The hex value for bright white(attribute 15) is &HFFFFFFFF or:
Alpha = FF (255), Red = FF (255), Green = FF (255), Blue = FF (255)
  • _RGB will return an alpha value of 255 for fully opaque 32 bit colors only. Values range from &HFF000000 to &HFFFFFFFF.
  • _RGB32 will return an alpha value of 255 for fully opaque colors only. Values range from &HFF000000 to &HFFFFFFFF.
  • _RGBA can set the transparency so hexadecimal values range from &H000000 (zero alpha) to &HFFFFFFFF (full alpha).
  • _RGBA32 can set the transparency so hexadecimal values range from &H000000 (zero alpha) to &HFFFFFFFF (full alpha).


  • So expanding on the principle above allows us to easily make up our own hex color values:
_PALETTECOLOR 1, &HFFFF0000 'COLOR 1 is full red
_PALETTECOLOR 2, &HFFFF00FF 'COLOR 2 is purple
_PALETTECOLOR 3, &HFFFFFF00 'COLOR 3 is brown
Where FF is the fully opaque _ALPHA and the 3 hex color values can range from 00 to FF (0 to 255) each.


Example: Converting the color port RGB intensity palette values 0 to 63 to 32 bit hexadecimal string values. 

SCREEN 12
DIM hex32$(15)
alpha$ = "FF"                              'solid alpha colors only
OUT &H3C8, 0: OUT &H3C9, 0: OUT &H3C9, 0: OUT &H3C9, 20 'set black background to dark blue

FOR attribute = 0 TO 15
  OUT &H3C7, attribute                     'set color attribute to read
  red$ = HEX$(INP(&H3C9) * 4)              'convert port setting to 32 bit values
  grn$ = HEX$(INP(&H3C9) * 4)
  blu$ = HEX$(INP(&H3C9) * 4)
  IF LEN(red$) = 1 THEN red$ = "0" + red$  'necessary for low or zero color intensities
  IF LEN(grn$) = 1 THEN grn$ = "0" + grn$
  IF LEN(blu$) = 1 THEN blu$ = "0" + blu$
  hex32$(attribute) = "&H" + alpha$ + red$ + grn$ + blu$
NEXT
PRINT "COLOR 0 = " + hex32$(0)
FOR i = 1 TO 15
  _PALETTECOLOR i, VAL(hex32$(i))
  COLOR i
  PRINT "COLOR" + STR$(i) + " = " + hex32$(i) 'returns closest attribute
NEXT
Code by Ted Weissgerber
Explanation: VAL is used to convert the hexadecimal string values to valid 32 bit color values for _PALETTECOLOR.
No VAL conversion is necessary if the LONG &H hexadecimal values are entered into the program directly by the programmer.


See also


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