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Difference between revisions of "SCUMM/Technical Reference/Room resources"
SCUMM/Technical Reference/Room resources (view source)
Revision as of 14:53, 18 November 2021
, 14:53, 18 November 2021no edit summary
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* Offset to box number location is stored as an UInt8, thus must be within the first 255 bytes of the chunk | * Offset to box number location is stored as an UInt8, thus must be within the first 255 bytes of the chunk | ||
* The header takes 28 bytes | * The header takes 28 bytes | ||
* The combined size of object image and object | * The combined size of object image and object code offsets is 4 bytes per object | ||
The total number of objects per room must be less than 57: | The total number of objects per room must be less than 57: | ||
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</table> | </table> | ||
=== Object | === Object code offsets === | ||
From there, there is the list of offsets to each object | From there, there is the list of offsets to each object code: | ||
<table border="2" cellspacing="0" cellpadding="4"> | <table border="2" cellspacing="0" cellpadding="4"> | ||
<tr><th>Location</th><th>Format</th><th>Data</th></tr> | <tr><th>Location</th><th>Format</th><th>Data</th></tr> | ||
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</table> | </table> | ||
'''Note:''' Some LFL files have unknown data between the last object | '''Note:''' Some LFL files have unknown data between the last object code offset and the boxes number offset location. For most file however, both data are contiguous. | ||
=== Boxes === | === Boxes === | ||
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There are <code>boxNum * boxNum</code> number of them read as UInt8. | There are <code>boxNum * boxNum</code> number of them read as UInt8. | ||
=== Object | === Object code === | ||
The object code section has the following structure starting from its corresponding object code offset: | |||
==== Object | ==== Object code header ==== | ||
<table border="2" cellspacing="0" cellpadding="4"> | <table border="2" cellspacing="0" cellpadding="4"> | ||
<tr><th>Relative location</th><th>Format</th><th>Data</th></tr> | <tr><th>Relative location</th><th>Format</th><th>Data</th></tr> | ||
<tr><td>0x00</td><td>UInt8</td><td>Size of the object | <tr><td>0x00</td><td>UInt8</td><td>Size of the object code chunk</td></tr> | ||
<tr><td>0x02</td><td>???</td><td>Unknown (Always 0 on NES)</td></tr> | <tr><td>0x02</td><td>???</td><td>Unknown (Always 0 on NES)</td></tr> | ||
<tr><td>0x03</td><td>???</td><td>Unknown (Always 0 on NES)</td></tr> | <tr><td>0x03</td><td>???</td><td>Unknown (Always 0 on NES)</td></tr> | ||
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</table> | </table> | ||
'''Note:''' The object | '''Note:''' The object code data starts at byte 15, the verb-script pairs part ends with a 0x00 byte. This means that the object name offset value is always an even number between 16 and 254. | ||
==== Object | ==== Object code data ==== | ||
Object | Object code data contains 3 sections optional, in this order: | ||
* 0 or more pairs of verb ids and object script offsets | * 0 or more pairs of verb ids and object script offsets | ||
* The name of the object | * The name of the object | ||