Available on: d32 c128 c64 atari atarixl to8 c64reu plus4 pc128op d64 mo5 coco3 coco
See also: BITMAP DISABLE TILEMAP ENABLE

BITMAP ENABLE

The ''BITMAP ENABLE' command is a fundamental tool, since it allows to configure the graphics mode of the screen, that is, to define how data was displayed on the screen, determining aspects such as the number of horizontal and vertical pixels that make up the image on the screen, and the color palette available for drawing images.

In 8-bit computers, memory was limited and processing power was much lower than modern computers. The BITMAP ENABLE allows you to optimize the use of resources by choosing the graphics mode best suited to the needs of the program and, at the same time, to generalize if the program must be ported on other hardware.

Given the great variety of hardware that ugBASIC supports and the isomorphic approach adopted, this commands can be used to require a specific resolution, color depth and other characteristics in a hardware independent way.

In this regard, the following approach has been adopted. It is possible to ask for specific chacteristics, such as height and width of the screen. However ugBASIC will choose the closest resolution, based on the hardware on which it will runs.

Likewise, if no type of resolution constraint is set, the best is offered.

To change resolution and colors, you can use the ([width],[height],[colors]), ([width],[height]) or the ([colors]) syntax after BITMAP ENABLE command. So, if you omit a parameters, it means thatit is not important to set.

syntax example abbreviation back to keywords

SYNTAX

 BITMAP ENABLE
 BITMAP ENABLE (colors)
 BITMAP ENABLE (width, height)
 BITMAP ENABLE (width, height, colors)


Legend
  • id : identifier
  • type : datatype
  • v : value
  • "..." : string
  • [...] : optional

EXAMPLE

 BITMAP ENABLE
 BITMAP ENABLE (320,200,16)
 BITMAP ENABLE (160,200,2)


Used in:

ABBREVIATION: BmEn

Join BASIC 10Liner Contest with ugBASIC!

An interesting competition is held at the beginning of each year: the BASIC 10Liner Contest. It is possible to use ugBASIC to participate in the next "BASIC10Liner" competition, in the following categories:

  • PUR-120 - A game in 10 lines of max 120 characters (w/abbrev.)
  • EXTREME-256 - A game in 10 lines of max 256 characters (w/abbrev.)
  • SCHAU - Any program in 10 lines of max 256 characters (w/abbrev.)
In order to reduce space you can use this abbreviation for this instruction: 

BITMAP ENABLE ↔ BmEn

Any problem?

If you have found a problem with this keyword, if you think there is a bug or, more simply, you would like it to be improved, open an issue for this example on GitHub.
Thank you!

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