home *** CD-ROM | disk | FTP | other *** search
-
- SpriteFix
- ===========
-
- Introduction
- ------------
-
- Many screen modes for the Archimedes are available as third-party modules,
- in addition to those provided as standard in ROM. If a sprite in a sprite
- or drawing file has been created in a screen mode which is not available on
- the system trying to display it, various undesirable effects can occur and
- the result will not generally be what was intended.
-
- For sprites to be portable between different systems, they should ideally be
- in a screen mode which is always available (i.e. one of the standard
- RiscOS 2 modes). However, sprites are often created by grabbing them from
- the screen, which means that they take on the screen mode that was in use at
- the time. If this is an unusual mode, then if you pass the sprite on to
- anyone who does not have that screen mode available then the sprite cannot
- be displayed.
-
- SpriteFix fixes this problem by automatically changing the screen mode
- stored with a sprite into a mode that is available on all systems. By
- selecting a mode which is compatible with the original, the size and
- appearance of the sprite does not change.
-
-
- Running the application
- -----------------------
-
- Run SpriteFix in the usual way by double-clicking on its icon. It will
- appear on the icon bar.
-
- To convert a file, drag it to the icon bar icon. It will be scanned for
- sprites, and any which have a mode conversion defined will be substituted
- with a new screen mode. When this is complete, a window with a standard
- save box will pop up, allowing the new file to be saved.
-
- The following types of files can be loaded and converted:
-
- • Standard Draw or sprite files
- • Draw files saved from DrawPlus
- • Vector files, saved from that application
- • Library files saved from DrawPlus or Vector
- • Compressed Draw files, saved from Chameleon II or some other 4Mation
- applications
- • Poster files, saved from that application.
-
- The file is always saved back in the same format as it was loaded in.
-
- The following types of files cannot be loaded or converted:
-
- • Impression documents. Don't blame me, or contact me suggesting that
- I should include support for this format, as it would be a lot of
- hard work and I don't fancy doing all that simply because Computer
- Concepts' programmers were too lazy to put the document in a single
- file like every other decent application...
-
-
- Setting up conversions
- ----------------------
-
- By choosing the "Setup" option from the icon bar menu, a window will open
- showing all of the mode conversions currently defined. This information is
- saved within the application directory, and is loaded when SpriteFix starts
- up.
-
- Each line in this window lists the original screen mode, the bits-per-pixel
- and scaling factors for that mode, and the mode that it will be translated
- to (which should have the same bits-per-pixel and scaling factors). This is
- the only information that is necessary to identify a suitable new mode
- (other mode parameters, such as screen size and VIDC setup, are not relevant
- to sprites).
-
- Entries in the list can be selected by clicking Select or Adjust on them, in
- the standard RiscOS way. The menu operations will act on the selected
- entries.
-
- To add a new mode is easy if it is available on the system. Simply pop up
- the menu and enter the mode number in the "New entry" entry box. The mode
- and its parameters will be added to the list, and a suitable standard mode
- translation added in the last column (this will be blank if no standard mode
- is suitable).
-
- If the new mode is not available on your system, then you will have to find
- out its parameters in some other way. When you have these available, then
- create the mode as before and then set the bits-per-pixel and scaling
- factors using the menu options (described later). When the parameters have
- been set, a mode translation will be added as before.
-
-
- Setup menu
- ----------
-
- The following options appear on the Setup window menu:
-
- Mode or Selection
-
- This item depends on how many entries are selected in the window. If
- none are selected it will read "Mode ''" and be shaded. If one entry is
- selected it will read "Mode 'number'" and the submenu can be used. If
- more than one entry is selected it will read "Selection" and only some of
- the submenu options can be used.
-
- Bits per pixel
-
- This sets the number of bits-per-pixel for the selected mode, which in
- turn determines how many colours can be displayed. The standard four
- options are available.
-
- Pixel scaling
-
- This sets the pixel scaling factor for the selected mode, which
- determines how the true size of a sprite is calculated. There are two
- numbers, one for horizontal and one for vertical scaling, which are
- the numbers of OS units per sprite pixel. The three most common
- settings (2x2, e.g. multisync modes such as 20; 2x4, e.g. normal "TV"
- modes such as 12; and 4x4, e.g. "coarse" modes such as 1) are
- available on this menu; unusual settings can be entered in the box
- leading off the "Specify" option.
-
- Like mode
-
- This sets the mode that the old, unknown mode will be translated to.
- Normally, it will not be necessary to enter this explicitly, as it
- will be determined automatically from the bits-per-pixel and scaling
- factors.
-
- Delete
-
- Deletes the selected entries from the setup list.
-
- Select all
-
- Selects all of the entries in the setup list.
-
- Clear select
-
- Clears the current selection.
-
- New entry
-
- Creates a new entry. Enter the mode number in the entry box leading off
- this option.
-
- Auto entry
-
- Automatically add entries for all of the screen mode currently available
- on the system. An entry will be added for each mode available which does
- not already have an entry, and which does not translate to itself.
-
- Save setup
-
- Save the setup list within the application directory; it will be loaded
- again when the application is next run.
-
-
- The boring bits
- ---------------
-
- SpriteFix copyright © Jonathan Marten 1993. Certain parts of the code,
- namely the compressed file loading/saving routines, were written by
- Paul LeBeau and are copyright © 4Mation 1992-1993.
-
- The application and documentation is "FreeWare" (not PD). It may be copied
- and freely distributed by anyone, on any medium (including bulletin boards
- and PD libraries), as long as no files within the application directory are
- altered (except for adding details of new screen modes to the setup data).
- It may not be sold commercially, either alone or as part of another package
- or application, without permission from the author. It may be used by any
- person for its intended purpose, or for any other purpose that it may turn
- out to be useful for.
-
- Bulletin boards, PD libraries and magazines are requested to contact the
- author before distributing the application, to ensure that they have the
- latest version.
-
- SpriteFix runs under RiscOS 3 only. It was developed, and has been tested,
- under RiscOS 3·10; it is believed that it will work under other versions.
-
- The application is supplied in good faith, but with no guarantee. Neither
- the author, nor any provider or distributor of the software, can be held
- responsible for any damage, loss of data, damage to files, wasted time or
- any other adverse effects caused by using the software, or its failure to
- perform as expected.
-
-
- Please report any praise, bugs, shortcomings or useful suggestions to me:
-
- Jonathan Marten Post: 11 Carmarthen Close
- Farnborough
- Hampshire
- GU14 8TJ
-
- Version 1·00 E-mail: jmarten@cix.compulink.co.uk
- August 1993 Arcade: 081-654-2212 user 387
-