andyp@treehouse.uucp (Andy Peterman) (01/06/91)
I just encountered something real strange with some files from the System 7.0 CD ROM - compressed resources. The latest ResEdit seems to recognize them, but when running under System 6.0.x, they don't load correctly when using GetResource. Does anyone know anything about them??? I searched through the IM Vol VI and there isn't a word about these! There seems to be a resource attribute bit to indicate that it's compressed, but nothing describing how to deal with it. Yet another 7.0 mystery..... -- Andy Peterman | Opinions expressed treehouse!andyp@gvgpsa.gvg.tek.com | are definitely those of (916) 273-4569 | my employer!
ralph@computing-maths.cardiff.ac.uk (Ralph Martin) (01/22/91)
The new ResEdit has a checkbox to show some whether a resource is compressed or not. Some of the resources in System 7.0b1 are indeed compressed. However, I can find NO documentation on compressed resources. There seems to be no mention of them in the Inside Mac Volume 6 resource manager or other chapters. Can anyone either point me to the documentation, or explain how they work? I've found a reference in Types.r to compressed resource guard mechanisms, and ResEdit itself seems to contain some code for decompressing resources, but thats about all I can find. I have some resources of my own it would be very handy to compress, and want to know if resource compression is (or will be) available for general use, or just for the System etc. The obvious trick of clicking on the compressed checkbox in ResEdit does NOT compress a resource. It seems to be read-only. Ralph
time@tbomb.ice.com (Tim Endres) (01/22/91)
In article <1991Jan22.110540.3139@computing-maths.cardiff.ac.uk>, ralph@computing-maths.cardiff.ac.uk (Ralph Martin) writes: > I've found a reference in Types.r to compressed resource guard > mechanisms, and ResEdit itself seems to contain some code for > decompressing resources, but thats about all I can find. I have some > resources of my own it would be very handy to compress, and want to > know if resource compression is (or will be) available for general > use, or just for the System etc. The obvious trick of clicking on the > compressed checkbox in ResEdit does NOT compress a resource. It seems > to be read-only. I wonder if the Resource Manager has been designed to be "smart" about when to compress resources, once again leaving the programmer on the short end of the design process. tim. ------------------------------------------------------------- Tim Endres | time@ice.com ICE Engineering | uupsi!ice.com!time 8840 Main Street | Whitmore Lake MI. 48189 | (313) 449 8288
lance@hermix.UUCP (Lance Ellinghouse) (03/22/91)
Is there a way for us developers to create compressed resources under System 7.0? I have a HUGE (125K now and soon MUCH more to be added) string resource. I would love to be able to compress this on the disk and have it uncompressed at usage time. Thanks, Lance Ellinghouse Mark V Systems, Ltd. hermix!lance@anes.ucla.edu
Greg@AppleLink.Apple.Com (Greg Marriott) (03/22/91)
In article <222@hermix.UUCP>, lance@hermix.UUCP (Lance Ellinghouse) writes: > > Is there a way for us developers to create compressed resources > under System 7.0? I have a HUGE (125K now and soon MUCH more > to be added) string resource. I would love to be able to > compress this on the disk and have it uncompressed at usage time. Sorry, but the answer is no. The reason is that the way decompression is implemented in 7.0 isn't much of an architecture (it's more of a hack). It was added to enable us to make floppies that you can use to install System 7. We are working on a more "complete" solution, one which we will feel comfortable supporting as a useful addition to the toolbox. We will document it when it's ready. Until then treat it as an undocumented black box subject to change at the drop of a hat. Greg Marriott Blue Meanie Apple Computer, Inc.
deadman@garnet.berkeley.edu (Ben Haller) (03/24/91)
In article <12678@goofy.Apple.COM> Greg@AppleLink.Apple.Com (Greg Marriott) writes: >In article <222@hermix.UUCP>, lance@hermix.UUCP (Lance Ellinghouse) writes: >> Is there a way for us developers to create compressed resources >> under System 7.0? I have a HUGE (125K now and soon MUCH more >> to be added) string resource. I would love to be able to >> compress this on the disk and have it uncompressed at usage time. >Sorry, but the answer is no. >The reason is...the way decompression is implemented in 7.0... >We are working on a more "complete" solution, one which we will feel >drop of a hat. Of course, you have the alternative of using your own compression/decompression code. I'm afraid this sounds like an advertisement, but I have code available that does LZW decompression and compression of individual resources. I use the code to great advantage in my game Solarian II (~740K compressed, ~1100K uncompressed). The source is available for $25 from me at: Stick Software c/o Ben Haller 32 Deer Haven Dr. Ithaca, N.Y. 14850 -Ben Haller (deadman@garnet.berkeley.edu)