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47 lines
2 KiB
Plaintext
47 lines
2 KiB
Plaintext
The [[PALETTE]] statement can swap color settings, set colors to default or set the red, green and blue color components of palette colors.
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{{PageSyntax}}
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: [[PALETTE]] [{{Parameter|attribute%}}, ''red%'' + (''green%'' * 256) + (''blue%'' * 65536)]
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: [[PALETTE]] [{{Parameter|existingAttribute%}}, {{Parameter|newAttribute%}}]
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{{PageDescription}}
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* {{Parameter|red%}}, {{Parameter|green%}} and {{Parameter|blue%}} values can range from 0 to 63. Many color shades are possible in non-[[DAC]] color attributes.
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* If the {{Parameter|red%}}, {{Parameter|green%}} and {{Parameter|blue%}} color intensity settings are all the same value the resulting color is a shade of grey.
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* A swap is often used with [[DAC]] color attributes that cannot change RGB settings. Only the RGB color settings are swapped from original {{Parameter|existingAttribute%}} to {{Parameter|newAttribute%}}. Screens 0 thru 9 support swaps. Screen 10 supports up to attribute 8 only.
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* PALETTE without any value sets any changed RGB settings back to the default color settings, including [[DAC]] colors.
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* [[PALETTE USING]] can be used when color intensity values are stored in an [[Arrays|array]].
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* QB64 implements the [[_PALETTECOLOR]] statement to provide extended palette functionality.
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==QBasic/QuickBASIC==
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* Screens 0, 7 and 9 ([[DAC]]) colors could not be changed using the first syntax, but the program could use [[OUT]] to change intensity settings of attributes 1 thru 5.
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{{PageExamples}}
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''Example:'' Displaying all 64 DAC color hues as backgrounds in SCREEN 9 using a PALETTE swap.
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{{CodeStart}} '' ''
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{{Cl|SCREEN (statement)|SCREEN}} 9 ' background is default black
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{{Cl|LOCATE}} 20, 33: {{Cl|PRINT}} "Press any Key!"
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{{Cl|FOR...NEXT|FOR}} i = 1 {{Cl|TO}} 64
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a$ = {{Cl|INPUT$}}(1) ' wait for a keypress
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{{Cl|PALETTE}} 0, i
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{{Cl|NEXT}} '' ''
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{{CodeEnd}}
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:''Note:'' Other attributes (1 to 15) can also be swapped for DAC foreground colors.
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{{PageSeeAlso}}
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* [[_PALETTECOLOR]]
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* [[PALETTE USING]]
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* [[COLOR]]
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* [[OUT]], [[INP]]
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* [[SCREEN]]
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{{PageNavigation}}
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