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Club Amiga de Montreal - CAM
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152.lha
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LinkUnTmpRas
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LinkUnTmpRas.h
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C/C++ Source or Header
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1988-04-26
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2KB
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/* LinkUnTmpRas.h -- allocate, initialize and link a TmpRas structure
* into the given RastPort. AllocRaster's a
* temporary raster area using the given size.
* Also a function to unlink and free the TmpRas and
* Raster.
* Written for Manx 3.4a
*
* Copyright 1988, Patrick White.
* Anybody can use this code in any commercial or non-commercial program.
* It may not be sold alone or as part of a code toolbox (without prior
* arrangments with me).
*/
/* struct TmpRas *InitLinkTR( rport, width, height, ret_code );
* struct RastPort *rport; -- RastPort to attatch TmpRas to
* LONG width; -- max width of screen or window
* LONG height; -- max height of screen or window
* LONG *ret_code; -- return code to indicate errors
*
* allocate, init, then link into the RastPort, a TmpRas structure and
* related Raster.
*
* return codes from ret_code
* 0 == all ok.. worked perfectly
* -1 == GfxBase not opened
* -2 == can't allocate raster
* -3 == can't allocate TmpRas structure
*/
/* LONG UnlinkFreeTR( rport, width, height )
* struct RastPort *rport; -- RastPort to unlink and free TmpRas from
* LONG width; -- max width of window or screen
* LONG height; -- max height of window or screen
*
* unlink and free the TmpRas and raster in a rasterport -- ASSUMES THAT
* BOTH WERE ALLOCATED BY THE ABOVE FUNCTION. If this is not the case,
* expect a visit from the GURU.
*
* return codes
* 0 == everything ok
* -1 == GfxBase no longer open -- nothing done
* -2 == TmpRas ptr was NULL
*/
/* LONG FreeTmpRas( tmpras, width, height )
* struct TmpRas *tmpras; -- ptr to TmpRas struct to free
* LONG width; -- width of raster to free
* LONG height; -- height of raster to free
*
* free a TmpRas structure alloacted by InitLinkTR()
* (does the grunt work for UnlinkFreeTmpRas().. but dosen't unlink it)
*
* return codes:
* 0 == all ok
* -2 == NULL tmpras ptr
*/
struct TmpRas *InitLinkTR();
LONG UnlinkFreeTR();
LONG FreeTmpRas();