$COLOR: Difference between revisions
Jump to navigation
Jump to search
Navigation:
Main Page with Articles and Tutorials
Keyword Reference - Alphabetical
Keyword Reference - By usage
Report a broken link
No edit summary |
No edit summary |
||
| (2 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
'''$COLOR''' is a metacommand that adds named color constants into a program, which then can be used instead of hardcoded literal color values. | |||
{{PageSyntax}} | {{PageSyntax}} | ||
: [[$COLOR]]:0 | : [[$COLOR]]''':'''{0|32} | ||
{{PageParameters}} | |||
* The one and only parameter is a literal number designating either to include [[SCREEN|SCREEN 0]] based color indexes, or full [[_RGB32]] color values with full (opaque) alpha. | |||
{{PageDescription}} | {{PageDescription}} | ||
* | * '''$COLOR:0''' adds constants for the colors 0-15 available in '''SCREEN 0''', these do also match for the first 16 colors on 8-Bit (256 colors) graphic screens as long as they are not changed using [[PALETTE]] or [[_PALETTECOLOR]]. For the actual constant names see [https://qb64phoenix.com/qb64wiki/resources/Color0.html $COLOR:0 Name Table]. | ||
* '''$COLOR:32''' adds constants for full 32-Bit color values as used on 32-Bit screens created via [[_NEWIMAGE]], similar to HTML color names. For the actual constant names see [https://qb64phoenix.com/qb64wiki/resources/Color32.html $COLOR:32 Name Table]. | |||
* Prior to QB64-PE v0.5.0, '''$COLOR''' was not compatible with [[$NOPREFIX]]. | |||
* Prior to QB64-PE v0.5.0, | * Since QB64-PE v0.5.0, '''$COLOR''' can now be used with [[$NOPREFIX]], with a few notable differences to three conflicting colors -- Red, Green, Blue. | ||
* Since QB64-PE v0.5.0, | |||
:Red would conflict with [[_RED]], Green would conflict with [[_GREEN]], and Blue would conflict with [[_BLUE]], once the underscore was removed from those commands with [[$NOPREFIX]]. | :Red would conflict with [[_RED]], Green would conflict with [[_GREEN]], and Blue would conflict with [[_BLUE]], once the underscore was removed from those commands with [[$NOPREFIX]]. | ||
| Line 23: | Line 25: | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cm|$COLOR}}:{{Text|0|#F580B1}} | {{Cm|$COLOR}}:{{Text|0|#F580B1}} | ||
{{Cl|COLOR}} BrightWhite, Red | {{Cl|COLOR}} BrightWhite, Red | ||
{{Cl|PRINT}} {{Text|<nowiki>"Bright white on red."</nowiki>|#FFB100}} | {{Cl|PRINT}} {{Text|<nowiki>"Bright white on red."</nowiki>|#FFB100}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
{{OutputStartBG0}} | {{OutputStartBG0}} | ||
{{Ot|Bright white on red.|# | {{Ot|Bright white on red.|#ffffff|#aa0000}} | ||
{{OutputEnd}} | {{OutputEnd}} | ||
| Line 36: | Line 39: | ||
{{Cl|SCREEN}} {{Cl|_NEWIMAGE}}({{Text|640|#F580B1}}, {{Text|400|#F580B1}}, {{Text|32|#F580B1}}) | {{Cl|SCREEN}} {{Cl|_NEWIMAGE}}({{Text|640|#F580B1}}, {{Text|400|#F580B1}}, {{Text|32|#F580B1}}) | ||
{{Cm|$COLOR}}:{{Text|32|#F580B1}} | {{Cm|$COLOR}}:{{Text|32|#F580B1}} | ||
{{Cl|COLOR}} CrayolaGold, DarkCyan | {{Cl|COLOR}} CrayolaGold, DarkCyan | ||
{{Cl|PRINT}} {{Text|<nowiki>"CrayolaGold on DarkCyan."</nowiki>|#FFB100}} | {{Cl|PRINT}} {{Text|<nowiki>"CrayolaGold on DarkCyan."</nowiki>|#FFB100}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
{{OutputStartBG0}} | |||
{{Ot|CrayolaGold on DarkCyan.|#E7C697|#008B8B}} | |||
{{OutputEnd}} | |||
---- | ---- | ||
| Line 44: | Line 51: | ||
;Example 3:Adding named color constants for 32-bit modes (with $NOPREFIX in effect). | ;Example 3:Adding named color constants for 32-bit modes (with $NOPREFIX in effect). | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|SCREEN}} {{Cl| | {{Cm|$NOPREFIX}} | ||
{{Cl|SCREEN}} {{Cl|NEWIMAGE}}({{Text|640|#F580B1}}, {{Text|400|#F580B1}}, {{Text|32|#F580B1}}) | |||
{{Cm|$COLOR}}:{{Text|32|#F580B1}} | {{Cm|$COLOR}}:{{Text|32|#F580B1}} | ||
{{Cl|COLOR}} NP_Red, White {{Text|<nowiki>'notice the NP_ in front of Red?</nowiki>|#919191}} | {{Cl|COLOR}} NP_Red, White {{Text|<nowiki>'notice the NP_ in front of Red?</nowiki>|#919191}} | ||
{{Text|<nowiki>'This is to distinguish the color from the command with $NOPREFIX.</nowiki>|#919191}} | {{Text|<nowiki>'This is to distinguish the color from the command with $NOPREFIX.</nowiki>|#919191}} | ||
{{Cl|PRINT}} {{Text|<nowiki>"Red on White."</nowiki>|#FFB100}} | {{Cl|PRINT}} {{Text|<nowiki>"Red on White."</nowiki>|#FFB100}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
{{OutputStartBG0}} | |||
{{Ot|Red on White.|#ff0000|#ffffff}} | |||
{{OutputEnd}} | |||
{{PageSeeAlso}} | {{PageSeeAlso}} | ||
* [[COLOR | * [[COLOR]] | ||
* [[ | * [[SCREEN]], [[_NEWIMAGE]] | ||
* [[Metacommand]] | * [[Metacommand]] | ||
* [https://qb64phoenix.com/qb64wiki/resources/Color0.html $COLOR:0 Name Table] | |||
* [https://qb64phoenix.com/qb64wiki/resources/Color32.html $COLOR:32 Name Table] | |||
{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 08:37, 14 June 2024
$COLOR is a metacommand that adds named color constants into a program, which then can be used instead of hardcoded literal color values.
Syntax
- $COLOR:{0|32}
Parameters
- The one and only parameter is a literal number designating either to include SCREEN 0 based color indexes, or full _RGB32 color values with full (opaque) alpha.
Description
- $COLOR:0 adds constants for the colors 0-15 available in SCREEN 0, these do also match for the first 16 colors on 8-Bit (256 colors) graphic screens as long as they are not changed using PALETTE or _PALETTECOLOR. For the actual constant names see $COLOR:0 Name Table.
- $COLOR:32 adds constants for full 32-Bit color values as used on 32-Bit screens created via _NEWIMAGE, similar to HTML color names. For the actual constant names see $COLOR:32 Name Table.
- Prior to QB64-PE v0.5.0, $COLOR was not compatible with $NOPREFIX.
- Since QB64-PE v0.5.0, $COLOR can now be used with $NOPREFIX, with a few notable differences to three conflicting colors -- Red, Green, Blue.
- Red would conflict with _RED, Green would conflict with _GREEN, and Blue would conflict with _BLUE, once the underscore was removed from those commands with $NOPREFIX.
- To prevent these conflicts, the COLOR values have had NP_ prepended to the front of them, to distinguish them from the non-prefixed command names. All other color names remain the same, with only the three colors in conflict having to use NP_ (for No Prefix) in front of them.
Examples
- Example 1
- Adding named color constants for SCREEN 0.
$COLOR:0 COLOR BrightWhite, Red PRINT "Bright white on red." |
Bright white on red.
|
- Example 2
- Adding named color constants for 32-bit modes.
SCREEN _NEWIMAGE(640, 400, 32) $COLOR:32 COLOR CrayolaGold, DarkCyan PRINT "CrayolaGold on DarkCyan." |
CrayolaGold on DarkCyan.
|
- Example 3
- Adding named color constants for 32-bit modes (with $NOPREFIX in effect).
$NOPREFIX SCREEN NEWIMAGE(640, 400, 32) $COLOR:32 COLOR NP_Red, White 'notice the NP_ in front of Red? 'This is to distinguish the color from the command with $NOPREFIX. PRINT "Red on White." |
Red on White.
|
See also