Jsummers at 14:43, 23 November 2018

2018-11-23T14:43:31Z

Kolen: Created page with "{{FormatInfo | name = Magic & Mayhem sprites file | formattype = electronic | subcat = Game data files | subcat2 = | subcat3 = | subcat4 ..."

2018-11-16T11:26:16Z

Created page with "{{FormatInfo | name = Magic & Mayhem sprites file | formattype = electronic | subcat = Game data files | subcat2 = | subcat3 = | subcat4 ..."

New page

{{FormatInfo
| name = Magic & Mayhem sprites file
| formattype = electronic
| subcat = Game data files
| subcat2 =
| subcat3 =
| subcat4 =
| subcat5 =
| thiscat =
| extensions = {{ext|spr}}
| mimetypes =
| locfdd =
| fourccs =
| pronom =
| type code =
| uniform type =
| kaitai struct =
| conforms to =
| released =
| image =
| caption =
}}

A collection of sprites for [[wikipedia:Magic & Mayhem|Magic & Mayhem]] game.

== Description ==

All integers are little-endian.

{| class="wikitable"
|+File header
|Signature - <code>"SPR\0"</code>
|4 bytes
|-
|File size
|4 bytes
|-
|Number of frames (sprites)
|4 bytes
|-
|Number of pallettes
|4 bytes
|-
|Unknown
|4 bytes
|-
|Pallettes
|256 * 3 bytes per each pallette
|-
|Frame offsets
|4 bytes * Number of frames; 0 is first byte after file header
|}

{| class="wikitable"
|+ Sprite (frame)
|-
|Size
|4 bytes
|-
|Width
|4 bytes
|-
|Height
|4 bytes
|-
|Origin x
|4 bytes (signed)
|-
|Origin y
|4 bytes (signed)
|-
|Name
|8 bytes, null-terminated
|-
|Pallette number (0-based)
|4 bytes
|-
|Unknown 1 (offset?)
|4 bytes
|-
|Unknown 2 (offset?)
|4 bytes
|-
|Offsets into lines and deltas for each row
|4 bytes * 2 * Height
|}

{| class="wikitable"
|+ Offset into lines and deltas
|Deltas offset (from beginning of sprite header)
|4 bytes
|-
|Pixels offset (from beginning of sprite header)
|4 bytes
|}

Sprite pixels are encoded with custom RLE scheme. Each scanline is:

* Read ''n'' number of pixels from ''deltas'' (1 byte), advancing ''deltas'' pointer
* Put ''n'' pixels from ''pixels'' offset (each pixel is 1 byte index into sprite's pallette), advancing ''pixels'' pointer
* Read ''b'' number of blank pixels from ''deltas'', advancing ''deltas'' pointer
* Put ''b'' blank pixels
* Repeat until whole width is filled

== Links ==

* [https://github.com/saniv/sau/blob/master/src/fmt_spr.c Sprite and Archive Utility - Magic & Mayhem sprite decoder source]
* [https://gist.github.com/kolen/2ece70493ba5d9510db01823bb6ac78e Incomplete Kaitai Struct format spec]

@@ Line 26: / Line 26: @@
 == Description ==
-All integers are little-endian.
+All integers are [[Endianness|little-endian]].
 {| class="wikitable"
@@ Line 39: / Line 39: @@
 |4 bytes
 |-
-|Number of pallettes
+|Number of palettes
 |4 bytes
 |-
@@ Line 45: / Line 45: @@
 |4 bytes
 |-
-|Pallettes
+|Palettes
-|256 * 3 bytes per each pallette
+|256 * 3 bytes per each palette
 |-
 |Frame offsets
@@ Line 73: / Line 73: @@
 |8 bytes, null-terminated
 |-
-|Pallette number (0-based)
+|Palette number (0-based)
 |4 bytes
 |-
@@ Line 95: / Line 95: @@
 |}
-Sprite pixels are encoded with custom RLE scheme. Each scanline is:
+Sprite pixels are encoded with custom [[Run-length encoding|RLE]] scheme. Each scanline is:
 * Read ''n'' number of pixels from ''deltas'' (1 byte), advancing ''deltas'' pointer
-* Put ''n'' pixels from ''pixels'' offset (each pixel is 1 byte index into sprite's pallette), advancing ''pixels'' pointer
+* Put ''n'' pixels from ''pixels'' offset (each pixel is 1 byte index into sprite's palette), advancing ''pixels'' pointer
 * Read ''b'' number of blank pixels from ''deltas'', advancing ''deltas'' pointer
 * Put ''b'' blank pixels
@@ Line 107: / Line 107: @@
 * [https://github.com/saniv/sau/blob/master/src/fmt_spr.c Sprite and Archive Utility - Magic & Mayhem sprite decoder source]
 * [https://gist.github.com/kolen/2ece70493ba5d9510db01823bb6ac78e Incomplete Kaitai Struct format spec]

Magic & Mayhem sprites file - Revision history

Jsummers at 14:43, 23 November 2018

Kolen: Created page with "{{FormatInfo | name = Magic & Mayhem sprites file | formattype = electronic | subcat = Game data files | subcat2 = | subcat3 = | subcat4 ..."