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- 256 Colour Palette File Editor from Mike Curnow
- ===============================================
-
- This application allows 256 colour palette files to be edited. The palette
- files can be used with graphics enhancer boards, with 256 colour sprites,
- and with applications that support 256 colour palette files such as !Paint
- and !Fractal.
-
- This software requires RiscOS 3.1 or higher.
-
- Use !Help to get help on icons & menus. This file provides additional help.
-
- 256 Colour Palette Files
- ========================
- These files are like the standard 16 colour Wimp palette files but with 256
- colours. The internal format is simply a VDU stream composed as follows:
-
- 19,n,16,r,g,b where n=0-255 colour number, and r/g/b are the colour levels.
-
- To set the palette outside the desktop use *PRINT filename. Under the
- desktop use the palette utility supplied with your graphics card - just drag
- the file onto the palette utility.
-
- 256 colour palette files are supported on the RiscPC and machines fitted with
- a graphics enhancer such as the Colour Card.
-
- If you don't have a graphics card you can still use 256 colour palettes in
- your 256 colour sprites. This is useful to get 256 grey scales when printing
- or transferring sprites to computers that support 256 colour images. To set
- the palette of a sprite, simply load the sprite file into !Paint and edit
- the sprite. Then drag a palette file onto the sprite window - !Paint will
- automatically redraw the image with the new colours as best as possible in
- the mode you are in. Note that you can drag straight from the EditPal
- Save-As window onto the !Paint window.
-
- Editing A Palette File
- ======================
- Load EditPal and then drag a palette file onto its icon to edit.
- Alternatively click SELECT to edit the default palette or Adjust the current
- palette if in a 256 colour mode.
-
- To edit a single colour double click SELECT on a square and then use the
- palette editor. The colour being edited is highlighted by a white square,
- and its number is shown in the palette editor title.
-
- To use the edit tools you need to select 1 or more colours. Click SELECT on
- the initial colour, then click ADJUST to set the range of colours which will
- be shown by a dashed box. Cancel a range by clicking SELECT.
-
- To Copy/Move/Swap/Merge a range, click SELECT over the FIRST colour of the
- range and then DRAG to the new position - a rotating dashed box shows that
- dragging is in progress.
-
- To increment / decrement a range of colours click SELECT / ADJUST on '⇧ ⇩'.
- Use the numbers below the icon to set the increment.
-
- Blend sets the colours in between the first and last selected colours to a
- smooth gradient. Use the colour icons below to select which colours to
- blend. For example if colour 0 was black and colour 255 was white, blending
- between the two would produce a grey scale.
-
- Rotate allows the colours to be rotated by +/- 90°. Besides the obvious
- effect, this facility is provided to allow you to select and edit a range of
- "vertical" colours.
-
- Viewing Palette Files
- =====================
- Up to 16 palettes may be viewed at the same time. You can copy via dragging
- palette values from one window into another. Colours are shown as best as
- possible by dithering - select a 256 colour mode for best results. When in a
- 256 colour mode you can click SELECT on the RGB tool icon to set the screen
- palette. Alternatively click ADJUST to set the palette except for colours
- 0-15 which are set to the desktop colours.
-
- ============================================================================
- History
- -------
- 1.00 March 93 Initial version
- 1.01 25/04/93 Preserve desktop colours when setting the palette.
- 1.10 20/06/94 Internal changes.
-
- ============================================================================
-
- Copyright Mike Curnow 1994. Not to be sold or copied under any circumstances
- without prior permission from the author.
-
- Mike Curnow
- Stoneleigh
- Swan Lane
- Great Bourton
- BANBURY
- OX17 1QR