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42 lines
1.7 KiB
Plaintext
42 lines
1.7 KiB
Plaintext
The '''PALETTE''' statement can swap color settings, set colors to default or set the Red, Green, Blue color palette.
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''RGB'' {{PageSyntax}}
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:::PALETTE [''attribute'', ''Red'' + (''Green'' * 256) + (''Blue'' * 65536)]
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''Swap'' {{PageSyntax}}
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:::PALETTE [''set_attribute'', new_attribute]
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* ''Red'', ''Green'' and ''Blue'' values can be from 0 to 63. Many color shades possible in non-[[DAC]] color attributes.
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* If the Red, Green and Blue color intensity settings are all the same value the color is greyscale.
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* Screens 0, 7 and 9 ([[DAC]]) colors cannot be changed by the RGB syntax statement in QBasic! Can use [[OUT]] to change attribute 1 thru 5 intensity settings.
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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 ''set_attribute'' to ''new_attribute''. Screens 0 thru 9 support swaps. Screen 10 up to 8 only.
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* PALETTE without any value sets any changed RGB settings back to the Qbasic 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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''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 be swapped for DAC foreground colors also.
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''See also:''
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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}} |