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Improve PICT compatibility, add batch mode to gpr2gpa

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elasota
2020-05-17 17:54:58 -04:00
parent 35308e41f3
commit 153213e079
19 changed files with 870 additions and 158 deletions
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27
Documentation/picterrors.txt Normal file
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@@ -0,0 +1,27 @@
Many Glider PRO houses, including the bundled ones, contain images in QuickDraw
PICT format in the game resource data.
Additionally, some PICT features are impossible to support because they
require copyrighted pattern sets and fonts that are bundled with the
operating system.
My goal is to support as many community houses as possible, but there is a
point where supporting the format is more work than just manually converting
the resources on a Macintosh machine or emulator.
All of the remaining known unsupported features necessary to decode the
remaining cases are only used by one house that I'm aware of each.
Known error codes:
Code 5 subcode 25: Strange image channel layout
Code 8 subcode 145: Unsupported BitsRgn opcode.
Code 8 subcode 40960: Undocumented opcode, possibly a format parsing error.
Code 8 subcode 34: Unsupported ShortLine opcode. (PICT contains vector graphics.)
Code 8 subcode 35: Unsupported ShortLineFrom opcode. (PICT contains vector graphics.)
Code 8 subcode 49: Unsupported PaintRect opcode. (PICT contains vector graphics.)
Code 8 subcode 51: Unsupported PaintOval opcode. (PICT contains vector graphics.)
Code 8 subcode 129: paintRgn opcode. (PICT contains vector graphics.)
Code 8 subcode 33280: Unsupported CompressedQuickTime opcode. (PICT contains a QuickTime frame.)
Code 8 subcode 33281: Unsupported UncompressedQuickTime opcode. (PICT contains a QuickTime frame.)

28
Documentation/userhouses.txt
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@@ -55,4 +55,30 @@ Some old QuickTime movies contain movie tracking information in the movie
resource fork, in which case you need to merge them into the data for modern
utilities to read them. You can use the "flattenmov" tool to do this: Pass
it the data (.gpd) and resource (.gpr) data files for a movie, and it will
merge them into a single .mov file.
merge them into a single .mov file.
BATCH CONVERSION
------------------------------------------------------------------------------
To batch-convert house resource files, use gpr2gpa with a path that ends
with an asterisk (*) and omit the output filename.
SECURITY CONSIDERATIONS
------------------------------------------------------------------------------
Glider PRO didn't really do any validation of houses. Currently, Aerofoil
doesn't do any additional validation either, and it's possible that invalid
house data may lead to crashes or even remote code execution.
I will be doing a hardening pass on the loader for the 1.1 release. Until
then, please only load houses from trusted sources.
Also, Glider PRO houses were able to take advantage of a resource overlaying
feature of the Macintosh operating system, where a resource being present in
the house file with the same ID as an application resource would cause the
resource to override the application resource.
Aerofoil's resource loader is much more restrictive: Currently, only
backgrounds, audio triggers, and icons may load from the house data. This
restriction will be loosened in the 1.1 release to allow resources to be
overrided if I can confirm that it's safe to override them.