$COLOR: Difference between revisions

From QB64 Phoenix Edition Wiki
Jump to navigation Jump to search
No edit summary
Tags: Manual revert Reverted
No edit summary
Tags: Undo Reverted
Line 43: Line 43:
{{Cl|$COLOR}}:32
{{Cl|$COLOR}}:32
{{Cl|$NOPREFIX}}
{{Cl|$NOPREFIX}}
{{Cl|COLOR}} NP_Red, White 'notice the NP_ in front of Red?
{{Cl|COLOR}} NP_Red, White 'notice the NP_ in front of Red?
'This is to distinguish the color from the command with $NOPREFIX.
'This is to distinguish the color from the command with $NOPREFIX.
{{Cl|PRINT}} "Red on White."
{{Cl|PRINT}} "Red on White."
Line 50: Line 50:


{{PageSeeAlso}}
{{PageSeeAlso}}
* [[COLOR]], [[SCREEN]]
* [[COLOR]], [[SCREEN]]  
* [[_NEWIMAGE]], [[$INCLUDE]]
* [[_NEWIMAGE]], [[$INCLUDE]]
* [[Metacommand]]
* [[Metacommand]]

Revision as of 23:05, 22 January 2023

$COLOR is a metacommand that adds named color constants in a program.


Syntax

$COLOR:0
$COLOR:32


Description

  • $COLOR:0 adds constants for colors 0-15. The actual constant names can be found in the file source/utilities/color0.bi.
  • $COLOR:32 adds constants for 32-bit colors, similar to HTML color names. The actual constant names can be found in the file source/utilities/color32.bi.
  • $COLOR is a shorthand to manually using $INCLUDE pointing to the files listed above.
  • 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."
Example 3
Adding named color constants for 32-bit modes (with $NOPREFIX in effect).
SCREEN _NEWIMAGE(640, 400, 32)
$COLOR:32
$NOPREFIX
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."


See also



Navigation:
Main Page with Articles and Tutorials
Keyword Reference - Alphabetical
Keyword Reference - By usage
Report a broken link