/*
 	File:		ScalerStreamTypes.h
 
 	Contains:	Scaler streaming data structures and constants for OFA 1.x
 
 	Version:	Technology:	Quickdraw GX 1.1
 				Release:	QuickTime 4.0
 
 	Copyright:	(c) 1994-1998 by Apple Computer, Inc., all rights reserved.
 
 	Bugs?:		For bug reports, consult the following page on
 				the World Wide Web:
 
 					http://developer.apple.com/bugreporter/
 
*/
#ifndef __SCALERSTREAMTYPES__
#define __SCALERSTREAMTYPES__

#ifndef __MACTYPES__
#include <MacTypes.h>
#endif
#ifndef __SFNTTYPES__
#include <SFNTTypes.h>
#endif



#if PRAGMA_ONCE
#pragma once
#endif

#ifdef __cplusplus
extern "C" {
#endif

#if PRAGMA_IMPORT
#pragma import on
#endif

#if PRAGMA_STRUCT_ALIGN
	#pragma options align=mac68k
#elif PRAGMA_STRUCT_PACKPUSH
	#pragma pack(push, 2)
#elif PRAGMA_STRUCT_PACK
	#pragma pack(2)
#endif

/* ScalerStream input/output types */

enum {
	cexec68K					= 0x0001,
	truetypeStreamType			= 0x0001,
	type1StreamType				= 0x0002,
	type3StreamType				= 0x0004,
	type42StreamType			= 0x0008,
	type42GXStreamType			= 0x0010,
	portableStreamType			= 0x0020,
	flattenedStreamType			= 0x0040,
	evenOddModifierStreamType	= 0x8000
};

/* Possible streamed font formats */
typedef unsigned long 					scalerStreamTypeFlag;

enum {
	downloadStreamAction		= 0,							/* Transmit the (possibly sparse) font data */
	asciiDownloadStreamAction	= 1,							/* Transmit font data to a 7-bit ASCII destination */
	fontSizeQueryStreamAction	= 2,							/* Estimate in-printer memory used if the font were downloaded */
	encodingOnlyStreamAction	= 3,							/* Transmit only the encoding for the font */
	prerequisiteQueryStreamAction = 4,							/* Return a list of prerequisite items needed for the font */
	prerequisiteItemStreamAction = 5,							/* Transmit a specified prerequisite item */
	variationQueryStreamAction	= 6,							/* Return information regarding support for variation streaming */
	variationPSOperatorStreamAction = 7							/* Transmit Postscript code necessary to effect variation of a font */
};

typedef long 							scalerStreamAction;

enum {
	selectAllVariations			= -1							/* Special variationCount value meaning include all variation data */
};


struct scalerPrerequisiteItem {
	long 							enumeration;				/* Shorthand tag identifying the item */
	long 							size;						/* Worst case vm in printer item requires */
	unsigned char 					name[1];					/* Name to be used by the client when emitting the item (Pascal string) */
};
typedef struct scalerPrerequisiteItem	scalerPrerequisiteItem;

struct scalerStream {
	const void *					streamRefCon;				/* <-	private reference for client */
	const char *					targetVersion;				/* <-	e.g. Postscript printer name (C string) */
	scalerStreamTypeFlag 			types;						/* <->	Data stream formats desired/supplied */
	scalerStreamAction 				action;						/* <- 	What action to take */
	unsigned long 					memorySize;					/* ->	Worst case memory use (vm) in printer or as sfnt */
	long 							variationCount;				/* <-	The number of variations, or selectAllVariations */
	const void *					variations;					/* <-	A pointer to an array of the variations (gxFontVariation) */
	union {
																/* Normal font streaming information*/
		struct {
			const unsigned short *			encoding;			/* <-	Intention is * unsigned short[256] */
			long *							glyphBits;			/* <->	Bitvector: a bit for each glyph, 1 = desired/supplied */
			char *							name;				/* <->	The printer font name to use/used (C string) */
		} 								font;

																/* Used to obtain a list of prerequisites from the scaler*/
		struct {
			long 							size;				/* -> 	Size of the prereq. list in bytes (0 indicates no prerequisites)*/
			void *							list;				/* <-	Pointer to client block to hold list (nil = list size query only) */
		} 								prerequisiteQuery;

		long 							prerequisiteItem;		/* <- 	Enumeration value for the prerequisite item to be streamed.*/

		long 							variationQueryResult;	/* ->	Output from the variationQueryStreamAction */
	} 								info;
};
typedef struct scalerStream				scalerStream;

struct scalerStreamData {
	long 							hexFlag;					/* Indicates that the data is to be interpreted as hex, versus binary */
	long 							byteCount;					/* Number of bytes in the data being streamed */
	const void *					data;						/* Pointer to the data being streamed */
};
typedef struct scalerStreamData			scalerStreamData;

#if PRAGMA_STRUCT_ALIGN
	#pragma options align=reset
#elif PRAGMA_STRUCT_PACKPUSH
	#pragma pack(pop)
#elif PRAGMA_STRUCT_PACK
	#pragma pack()
#endif

#ifdef PRAGMA_IMPORT_OFF
#pragma import off
#elif PRAGMA_IMPORT
#pragma import reset
#endif

#ifdef __cplusplus
}
#endif

#endif /* __SCALERSTREAMTYPES__ */

