Myst PICT resources - Revision history

TitoDalCanton: DirectBits PICTs are RLE compressed

2008-10-17T21:32:08Z

DirectBits PICTs are RLE compressed

TitoDalCanton: restyle

2008-10-17T15:38:43Z

restyle

TitoDalCanton: not invalid PICT data, just more complex

2008-10-15T14:11:30Z

not invalid PICT data, just more complex

TitoDalCanton: Protected "Myst PICT resources" [edit=autoconfirmed:move=autoconfirmed]

2008-10-15T14:08:23Z

Protected "Myst PICT resources" [edit=autoconfirmed:move=autoconfirmed]

TitoDalCanton: more on non-JPEG PICTs

2008-09-30T19:19:58Z

Clone2727: mention that some pict's also contain regular MacOS pict's (without the JPEG data)

2008-09-07T16:53:39Z

mention that some pict's also contain regular MacOS pict's (without the JPEG data)

TitoDalCanton: oh NO!!

2008-09-07T15:56:03Z

oh NO!!

TitoDalCanton: jpeg data offset

2008-09-07T15:46:58Z

jpeg data offset

TitoDalCanton: that was really easy

2008-09-03T16:34:12Z

that was *really* easy

TitoDalCanton: yeah that was easy

2008-09-03T16:24:14Z

yeah that was easy

@@ Line 3: / Line 3: @@
 PICT resources contain the main game graphics in Myst Masterpiece Edition, replacing most [[Myst_WDIB_resources|WDIBs]] of the original edition with true-color versions.
-The data is usually in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. It starts with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. The PICT opcodes are usually a bunch of utility ones (e.g. PnSize and DefHilite) together with a CompressedQuickTime one containing JPEG data. The JPEG block seems to always start at offset 726 into the resource and can thus be simply extracted and decoded, ignoring the complicated PICT format.
+The data is usually stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. It starts with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. The PICT opcodes are usually a bunch of utility ones (e.g. PnSize and DefHilite) together with a CompressedQuickTime one containing JPEG data. The JPEG block seems to always start at offset 726 into the resource and can thus be simply extracted and decoded, ignoring the complicated PICT format.
-However, a few PICT resources contain more complex PICT data, also including LongComment opcodes. Pixels are given by a DirectBits opcode so they are uncompressed (you spot those cases immediately from their huge size). Among these exceptions there are PICT 2258 from STONE.DAT, PICTs 4109, 4112, 4113, 4447, 4461, 4462, 4479-4483, 4551, 4779, 11221, 11222 from MYST.DAT.
+However, a few PICT resources contain more complex PICT data, also including LongComment opcodes. Pixels are given by a DirectBitsRect opcode and they are compressed using a run-length encoding similar to [http://en.wikipedia.org/wiki/PackBits PackBits] (packType = 4 in the PixMap). You spot these cases immediately from their large size with respect to JPEG ones. Among these exceptions there are PICT 2258 from STONE.DAT, PICTs 4109, 4112, 4113, 4447, 4461, 4462, 4479-4483, 4551, 4779, 11221, 11222 from MYST.DAT.
 Finally, a few perverse PICT resources just retain the WDIB format. Examples are PICTs 2105 and 2112 from STONE.DAT. Fortunately, it is quite easy to discriminate between WDIB and Apple PICT data.

@@ Line 3: / Line 3: @@
 PICT resources contain the main game graphics in Myst Masterpiece Edition, replacing most [[Myst_WDIB_resources|WDIBs]] of the original edition with true-color versions.
-They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.
+The data is usually in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. It starts with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. The PICT opcodes are usually a bunch of utility ones (e.g. PnSize and DefHilite) together with a CompressedQuickTime one containing JPEG data. The JPEG block seems to always start at offset 726 into the resource and can thus be simply extracted and decoded, ignoring the complicated PICT format.
-However, a few cases do not contain simple JPEG data (e.g. PICT 2258 from STONE.DAT, PICT 4109, 4112, 4113, 4447, 4461, 4462, 4479-4483, 4551, 4779, 11221, 11222 from MYST.DAT). These contain more elaborate PICT data, such as LongComments and DirectBits QuickDraw opcodes. Also note that a few perverse PICT resources just retain the WDIB format (i.e. PICT 2105 and 2112 from STONE.DAT).
+However, a few PICT resources contain more complex PICT data, also including LongComment opcodes. Pixels are given by a DirectBits opcode so they are uncompressed (you spot those cases immediately from their huge size). Among these exceptions there are PICT 2258 from STONE.DAT, PICTs 4109, 4112, 4113, 4447, 4461, 4462, 4479-4483, 4551, 4779, 11221, 11222 from MYST.DAT.

← Older revision		Revision as of 14:11, 15 October 2008
Line 5:		Line 5:
	They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.		They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.

−	However, a few cases do not contain JPEG data (e.g. PICT 2258 from STONE.DAT, PICT 4109, 4112, 4113, 4447, 4461, 4462, 4479-4483, 4551, 4779, 11221, 11222 from MYST.DAT). These contain ~~sort of invalid~~ PICT data, as ~~no program is able to decode them~~. Also note that a few perverse PICT resources just retain the WDIB format (i.e. PICT 2105 and 2112 from STONE.DAT).	+	However, a few cases do not contain simple JPEG data (e.g. PICT 2258 from STONE.DAT, PICT 4109, 4112, 4113, 4447, 4461, 4462, 4479-4483, 4551, 4779, 11221, 11222 from MYST.DAT). These contain more elaborate PICT data, such as LongComments and DirectBits QuickDraw opcodes. Also note that a few perverse PICT resources just retain the WDIB format (i.e. PICT 2105 and 2112 from STONE.DAT).

← Older revision		Revision as of 19:19, 30 September 2008
Line 5:		Line 5:
	They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.		They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.

−	~~Some PICT are MacOS PICT's without~~ JPEG data (i.e. PICT 2258 from STONE.DAT). Also note that a few perverse PICT resources just retain the WDIB format (i.e. PICT 2105 and 2112 from STONE.DAT).	+	However, a few cases do not contain JPEG data (e.g. PICT 2258 from STONE.DAT, PICT 4109, 4112, 4113, 4447, 4461, 4462, 4479-4483, 4551, 4779, 11221, 11222 from MYST.DAT). These contain sort of invalid PICT data, as no program is able to decode them. Also note that a few perverse PICT resources just retain the WDIB format (i.e. PICT 2105 and 2112 from STONE.DAT).

← Older revision		Revision as of 16:53, 7 September 2008
Line 5:		Line 5:
	They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.		They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.

−	~~Note however~~ that a few perverse PICT resources just retain the WDIB format (e.~~g. IDs~~ 2105 and 2112 from ~~the Stoneship archive~~).	+	Some PICT are MacOS PICT's without JPEG data (i.e. PICT 2258 from STONE.DAT). Also note that a few perverse PICT resources just retain the WDIB format (i.e. PICT 2105 and 2112 from STONE.DAT).

← Older revision	Revision as of 14:08, 15 October 2008
(No difference)

← Older revision		Revision as of 15:56, 7 September 2008
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	{{Myst}}		{{Myst}}

−	PICT resources contain the main game graphics in Myst Masterpiece Edition, replacing most [[Myst_WDIB_resources\|WDIBs]] of the original edition with true-color versions. They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.	+	PICT resources contain the main game graphics in Myst Masterpiece Edition, replacing most [[Myst_WDIB_resources\|WDIBs]] of the original edition with true-color versions.
		+
		+	They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.
		+
		+	Note however that a few perverse PICT resources just retain the WDIB format (e.g. IDs 2105 and 2112 from the Stoneship archive).

← Older revision		Revision as of 15:46, 7 September 2008
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	{{Myst}}		{{Myst}}

−	~~These seem to~~ contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded.	+	PICT resources contain the main game graphics in Myst Masterpiece Edition, replacing most [[Myst_WDIB_resources\|WDIBs]] of the original edition with true-color versions. They contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded; the JPEG block starts at offset 726 and can be simply extracted and decoded.

← Older revision		Revision as of 16:34, 3 September 2008
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	{{Myst}}		{{Myst}}

−	These seem to contain pictures. They start with a block of data ~~726 bytes long (mostly zeroes) and then a plain JPEG stream follows~~. ~~Maybe other data is there too~~.	+	These seem to contain pictures stored in plain [http://en.wikipedia.org/wiki/PICT Apple PICT] format. They start with the usual 512 byte block of platform-dependent data as in regular MacOS PICT resources. JPEG contents have been observed and correctly decoded.

← Older revision		Revision as of 16:24, 3 September 2008
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	{{Myst}}		{{Myst}}

−	These seem to contain pictures. They ~~seem to begin~~ with ~~blocks~~ of zeroes, and ~~dumps reveal strings like "jpeg", "appl", "Photo -~~ JPEG~~" and "AppleMark"~~. ~~They may just be obscured JPEG~~ data.	+	These seem to contain pictures. They start with a block of data 726 bytes long (mostly zeroes) and then a plain JPEG stream follows. Maybe other data is there too.