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- Apple II
- Technical Notes
- _____________________________________________________________________________
- Developer Technical Support
- Apple IIgs
- #99: Supplemental Scrap Types
-
- Revised by: Dave Lyons May 1992
- Written by: Matt Deatherage & Matthew Reimer January 1991
-
- This Technical Note describes public scrap types.
-
- CHANGES SINCE MARCH 1991: Added information on Scrap Type $8003 (Resource
- Reference Scrap); added a cross-reference to HyperCard IIgs Technical Note #3.
- _____________________________________________________________________________
-
-
- The Apple IIgs Toolbox Reference lists only two known scrap types--text
- ($0000) and pictures ($0001). Other assigned scrap types are documented in
- this Note. The format used to describe the scraps is similar to that used in
- File Type Notes, where the offsets, given in the form (+xxx), determine the
- offset from the beginning of the scrap handle.
-
-
- SAMPLED SOUND SCRAP (TYPE: $0002)
-
- The following describes the Sampled Sound scrap format. It consists of a
- ten-byte header followed by the sample data bytes. This format is identical
- to the sampled sound resource format.
-
- Format (+000) Word This must always be zero.
- Wave Size (+002) Word Sample size in pages (256 bytes per page). For
- example, an 8K sample takes 32 pages; a 128K sample
- requires $200 pages.
- Rel Pitch (+004) Word The high byte of this word is a semitone value; the
- low byte is a fractional semitone. These values
- are used to tune the sample to correct pitch. (See
- HyperCard IIgs Technical Note #3, Tuning Sampled
- Sounds.)
- Stereo (+006) Word The output channel for this sound is in the low
- nibble of this word.
- Sample rate (+008) Word The sampling rate of the sound, in Hertz (Hz).
- Sound (+010) Bytes The sampled sound data. The bytes are all 8-bit
- samples. The sample starts here and continues
- until the end of the scrap.
-
-
- TEXTEDIT STYLE SCRAP (TYPE: $0064)
-
- The TextEdit Style Scrap format is the same as the TEFormat structure defined
- in Volume 3 of the Apple IIgs Toolbox Reference, which is also the same as the
- rStyleBlock resource format defined in the same volume.
-
-
- ICON SCRAP (TYPE: $4945)
-
- The Icon scrap format is the same as the format for Finder Icon Data records,
- documented in detail in the File Type Note for File Type $CA, Finder Icon
- Files. If there is more than one Icon Data record in a scrap, they are
- concatenated together with no intervening space.
-
-
- MASK SCRAP (TYPE: $8001)
-
- The Mask scrap format is exactly the same as the PICT scrap ($0001) format,
- except that the pixel image the picture draws contains only zeroes and ones.
- When drawn, this picture creates a mask. The mask has zeroes where the image
- can be seen through the mask, and ones where the mask does not allow the
- picture through. When pasting a Mask scrap, initialize the destination bitmap
- to zero and draw the picture.
-
- You can create the mask image by using regular QuickDraw II calls (using
- ovals, rectangles, etc.) or you can create it independently and include it
- with PaintPixels or other pixel map manipulation routines.
-
-
- COLOR TABLE SCRAP (TYPE: $8002)
-
- The following describes the Color Table scrap format. The scrap contains
- color tables so that applications can keep custom colors with pictures copied
- to the clipboard. The scrap has the same format as the Apple Preferred Format
- picture PALETTES block:
-
- NumColorTables (+000) Word The count of the number of color tables in
- the scrap
- ColorTableArray (+002) 32 Bytes The color tables for the scrap. There are
- NumColorTables of them, each 32 bytes long.
-
- RESOURCE REFERENCE SCRAP (TYPE: $8003)
-
- The Resource Reference scrap is designed to allow resource editors to exchange
- resource data through an external scrap file using the Scrap Manager.
-
- resScrapType (+000) Word Type of resource (within the resScrapPath file)
- resScrapID (+002) Long ID of resource (within the resScrapPath file)
- resScrapPath (+006) WString Full GS/OS class-one pathname to an extended
- file containing the specified resource.
-
- If the specified resource contains references to other resources (for example,
- an rWindParam1 resource with a title string, control list, control templates,
- etc.), all the referenced resources must be present in the resScrapPath file.
-
- It is the responsibility of the application using this scrap to handle
- resource ID conflicts that might arise from a Paste operation. The
- application should not modify or destroy the resScrapPath file.
-
-
- Further Reference
- _____________________________________________________________________________
-
- o Apple IIgs Toolbox Reference
- o HyperCard IIgs Technical Note #3, Tuning Sampled Sounds
- o File Type Note for file type $CA, all auxiliary types, Finder Icons
- File
- o File Type Note for file type $C0, auxiliary type $0002, Apple
- Preferred Format
-