cafont_load.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static char SccsId[] = "  @(#)cafont_load.c	4.1   LPS_ULT_TRN   7/2/90";
#endif
/* file: cafont_load.c
 *
 *	COPYRIGHT  (c)  DIGITAL  EQUIPMENT CORPORATION 1987,
 *	1988, 1989 ALL RIGHTS RESERVED.
 *
 *	THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE
 *	USED AND COPIED ONLY IN ACCORDANCE  WITH THE TERMS OF
 *	SUCH  LICENSE  AND  WITH  THE  INCLUSION OF THE ABOVE
 *	COPYRIGHT  NOTICE.  THIS SOFTWARE OR ANY OTHER COPIES
 *	THEREOF   MAY  NOT  BE  PROVIDED  OR  OTHERWISE  MADE
 *	AVAILABLE  TO  ANY  OTHER  PERSON.  NO  TITLE  TO AND
 *	OWNERSHIP  OF  THE  SOFTWARE  IS  HEREBY TRANSFERRED.
 *
 *	THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE
 *	WITHOUT  NOTICE  AND SHOULD  NOT BE  CONSTRUED  AS A
 *	COMMITMENT  BY  DIGITAL EQUIPMENT CORPORATION.
 *
 *	DIGITAL  ASSUMES  NO RESPONSIBILITY  FOR THE  USE  OR
 *	RELIABILITY  OF ITS SOFTWARE ON EQUIPMENT THAT IS NOT
 *	SUPPLIED BY DIGITAL.
 *
 */




/*
 *-----------------------------------------------------------
 *
 *   begin edit_history
 *
 *   001   9-MAR-1988 14:24  mhw
 *	Initial Version, created by splitting cafont.c
 *
 *   002  13-MAR-1988 19:06 mhs
 *      Finish merging routines from CADCS and finish arithmetic
 *      typecasting.
 *
 *  20-APR-1988 10:28 mhw
 *	Added real code for the 2 reserve memory routines
 *
 *  19-MAY-1988 16:52 mhw
 *	Cleaned sixel_cvt_and_store routine such that "ch" variable was
 *	eliminated.  A shift does not cause the value in "sixel" to change, 
 *	so the original value did not need to be stored in "ch".
 *	
 *	Fixed bug in calls to sixel_cvt_and_store.  The position to store the
 *	sixel was not incremented by cmd_str_len, so always stored it at the
 *	beginning of the memory reserved.  This was lost when moved from the
 *	Translator.
 *
 *	In dec_lff_load, removed decrement of dcs_store_ptr by cmd_str_len.
 *	dcs_store_ptr is never increment, it always points to the begining.
 *
 *   3-JUN-1988 15:30  mhw
 *	Change call to font_dispose_font to not use box_number
 *	Change call to font_get_memory to pass PL not LONG
 *	Added calls to font_dispose_of_font if font goes beyond memory
 *	    available, if syntax error, or if bad result from analyze
 *
 *   7-JUL-1988 15:49  mhw
 *	Make changes for conversion of cp_pbuf from WORD to LONG
 *   end edit_history
 *
 *  30-NOV-1988 14:28 araj
 *	Install cfont caching, change calls to compute font into calls to invalidate_font
 *	Make sure references to vai or g_table have a test for the validity of the data
 *	first
 *
 *
 *-----------------------------------------------------------
 */


/*
 *-----------------------------------------------------------
 *
 *   begin description
 *
 *   Filename:  cafont_load.c
 *
 *
 *   This module includes
 *
 * dec_rfs()
 * dec_rfnm()
 * dec_rbmm()
 * dec_uffm()
 * save_dcs_introducer()
 * init_cmd_ptr()
 * dec_lff_enter()
 * dec_lff_term()
 * dec_lff_font()
 * dec_lff_load()
 * dec_lff_sxl()
 * dec_lff_sxl_rpt()
 * dec_dld()
 * sixel_cvt_and_store()
 *
 *   end description
 *
 *-----------------------------------------------------------
 */


/*
 *-----------------------------------------------------------
 *
 *   begin edit_history of cafont.c
 *
 *   001    22-JAN-1988 17:24 mhw
 *      Added dump file of dufont.c and ducrend.c to translator routines.
 *      #ifdefs separate the dump routines from the real routines.
 *      ducrend routines moved here since were here for the translator.
 *
 *   002    25-JAN-1988 14:01 bf
 *	Started filling out stubbed action routines.  Extract from
 *	switch in original action routine.
 *
 *   003    15-FEB-1988 11:05  mhw
 *      Add include of camac.lib for non-dump oprintf
 *
 *   004   15-FEB-1988 17:11 mhs
 *      Move enter_dcs_store code into specific routines for ATFF,
 *      DTFF, LFF and AUPSS.
 *
 *   end edit_history
 *
 *-----------------------------------------------------------
 */



/* Translator edit history for these routines.
 *
 * file:	xlc_font.c - Translator font routines
 * created:	gh	 26-MAR-1986 09:10:31
 * edit:
 *	gh	 2-MAY-1986 08:10:53
 *		Adding font_init() stub
 *	nv	 5-MAY-1986 10:31:00
 *		Adding the following routines:
 *			declff ()
 *			delete_font_files ()
 *			tabulate_deleted_font_file ()
 *			tabulate_new_font_file ()
 *			update_font_table_and_sgr_flags ()
 *			create_new_paired_font ()
 *			new_ps_font_number ()
 *			decdtff ()
 *			decatff ()
 *			update_sgr_font_tbl_entry_flag ()
 *			blob ()
 *			compute_font ()
 *			compute_font_for_g_set ()
 *		and the following tables:
 *			paired_char_set_table
 *			ps_font_table
 *		and about 50 literals
 *	nv	 7-MAY-1986 19:15:00
 *		Adding the following routines:
 *			init_font_dictionaries ()
 *			init_font_table ()
 *			init_width_table ()
 *			init_left_bearing_table ()
 *			init_right_bearing_table ()
 *			init_paired_char_set_table ()
 *			compute_vai ()
 *		the following literals:
 *			NUMBER_OF_PS_FIXED_FONT_DICTNRS
 *			NUMBER_OF_PS_FONT_DICTIONARIES
 *			NUMBER_OF_8_BIT_CHARACTERS
 *			FIRST_DOWNLOADED_FONT
 *		and the following external declarations:
 *			width_table [ NUMBER_OF_PS_FONT_DICTIONARIES ]
 *                                            [ NUMBER_OF_8_BIT_CHARACTERS ]
 *			left_bearing_table [ NUMBER_OF_PS_FONT_DICTIONARIES ]
 *                                            [ NUMBER_OF_8_BIT_CHARACTERS ]
 *			right_bearing_table [ NUMBER_OF_PS_FONT_DICTIONARIES ]
 *                                            [ NUMBER_OF_8_BIT_CHARACTERS ]
 *	nv	 8-MAY-1986 11:30:00
 *		Adding the following routines:
 *			init_height_table
 *			init_min_table
 *			init_max_table
 *			init_ps_font_table
 *			init_sgr_tbl
 *			init_g_table
 *		and the following external declarations:
 *			height_table [ NUMBER_OF_PS_FONT_DICTIONARIES ]
 *			min_table [ NUMBER_OF_PS_FONT_DICTIONARIES ]
 *			max_table [ NUMBER_OF_PS_FONT_DICTIONARIES ]
 *		and to font_table adding the following substructure items:
 *			min
 *			max
 *	nv	 30-MAY-1986 11:30:00
 *		Removed the init_font_dictionary routine by merging its contents
 *		into the font_init routine.
 *		Defined ERROR_MACRO.
 *		Replaced [undeveloped] references to ERROR_CODE with 
 *		ERROR_MACRO.
 *		Significantly rewrote compute_font_for_g_set to refine the
 *		selection of font file for type families.
 *	gh	 8-JUN-1986 10:51:51 In compute_font_for_g_set() added
 *		'if (font_value1 [i] .whole == DEAD)  continue;' after the FOR
 *		loop that followed the comment:
 *		"Eliminate all font files except those with equal or smaller
 *		spacing or character proportion. Also Enhance all font files 
 *		with the correct kind of spacing, i.e., proportionally spaced
 *		or monospaced.  Note that no font files are eliminated based 
 *		on this property."
 *	nv	 18-JUN-1986 09:42:33 Replaced download_font_to_ps_machine
 *		with dispose_font and restructured so that setup_metric_tables
 *		immediately preceeds download_font_to_ps_machine. Incorporated
 *		preliminary ISO software changes, i.e., mainly shuffled nrcs
 *		transformation indices.
 *	nv	 26-JUN-1986 21:16:48 Redesigned compute_font_for_g_set and
 *		dump_font_value to employ a new three part font_value which
 *		provides, inherently in its design, an automatic fall-back
 *		capability. 
 *		Deactivated ERROR_MACRO and all printf's and dump's.
 *	nv	 27-JUN-1986 14:57:04 Renamed requested_attributes
 *		xl_st .requested_attributes. everywhere used.
 *		Removed local declarations of 'requested_attributes.'
 *		Removed superfluous initialization of 'requested_attributes.'
 *	nv	 27-JUN-1986 21:47:06 Included compute_proportional_mode
 *		in sgr and decatff.
 *		Incorporate blob metrics into tables.
 *	nv	 1-JUL-1986 11:30:47 Make initialization of right_bearing_table
 *		to '0' for all [monospaced] fixed fonts.
 *		Make initialization of superscript_height_table and
 *		subscript_height_table to be half of the height_table entry
 *		[total vertical size] for the fixed fonts.
 *		So that multiple gms (Graphics Size Modification) commands do
 *		not have a cummulative effect, make and maintain a copy of the
 *		last gss (Graphic Size Selection) parameter [called
 *		last_gss_size]. All gms commands are with respect to the last
 *		gss. 
 *	nv	 9-JUL-1986 17:48:53 Enabled a bug in sgr to allow algorithmic 
 *		altering of attributes when fonts are selected by font id. 
 *	nv	 10-JUL-1986 14:33:44 Deleted 'copy_font' stub.
 *		Changed 'copy_font' to 'dispose_copy_font'.
 *	nv	 10-JUL-1986 17:52:10 Redesigned 'horiz_spacing' function.
 *		Removed redundant initialization of xl_st .propl_mode.
 *		In compute_font_for_g_set() revised the way xl_st .propl_mode
 *		is used and added comments.
 *	nv	 22-JUL-1986 12:58:02 Added provisions for deleted font not
 *		being garbaged collected by the PS machine. Basically, once a
 *		font table entry is used it may deactiveated (when the font
 *		file is deleted but it cannot be reused. 
 *		Defined new literal: DELETED_FONT_FILES_ARE_REMOVED FALSE
 *		Added and cleaned up some comments.
 *	nv	 22-JUL-1986 16:07:47 Added provisions for disabling the 
 *		pairing of font files where the coping of a fixed font files
 *		is required (until this functionality is available in the PS
 *		machine). 
 *		Defined new literal: FIXED_FONT_FILES_CAN_BE_COPIED FALSE
 *		Added and cleaned up some comments.
 *	nv	 29-JUL-1986 16:00:07 deleted references to VIRTUAL_CHAR_BLOB;
 *		Replaced them with references to VIR_CHAR_BLOB.
 *	nv	 29-JUL-1986 17:39:00 Changed init_font_table and 
 *		init_width_table to use 'CPI' literals.
 *	nv	 30-JUL-1986 10:52:06 Deleted the assignments of G0-G3 to 
 *		GL and GR.
 *	gh	 1-AUG-1986 15:57:05 Modified init_font_table to initialize the
 *		.font_file_id's to '\0' of all table entries above FIRST_
 *		DOWNLAODED_FONT up to FONT_TABLE_SIZE
 *
 *	araj/gh	 1-AUG-1986 17:46:22 
 *		Added initialization of height_table for DLL fonts
 *		to prevent invalid font being defined.
 *
 *	araj	 1-AUG-1986 19:11:14 
 *		Changed #if 0 into #if dump.....
 *		to make it easier to enable/disable dumps
 *	nv	 6-AUG-1986 12:33:31 
 *		Modified the following initialization procedures so that ALL 
 *		tabular info is initialized instead of that just pertinent to 
 *		fixed fonts:
 *			init_font_table,
 *			init_width_table,
 *			init_paired_char_set_table,
 *			init_max_table,
 *			init_min_table,
 *			init_total_height_table,
 *			init_above_baseline_table, 
 *			init_superscript_height_table, 
 *			init_subscript_height_table, and 
 *			init_average_width_table.
 *		Updated print statement which describes the bit structure of
 *		the font values.
 *	nv	 15-AUG-1986 15:43:49 Fixed sgr for handling the absence of
 *		arguments.
 *	nv	 27-AUG-1986 09:38:52 Fixed bug in 'tabulate_new_font_file' to
 *		allow downloaded font files of character set which are
 *		identical to the user preference character set to be
 *		associated with g_sets (G0-G3) which are user preference.
 *		Disabled 9-JUL-1986 bug in 'compute_font_for_g_set' and 'sgr' 
 *		to allow algorithmic altering of attributes when fonts are
 *		selected by font id. 
 *		Removed definition of ERROR_REPORT to dbug.h
 *		Removed definition of NUMBER_OF_PS_FONT_DICTIONARIES and where
 *		used changed the spelling to NUMBER_OF_PS_DICTIONARIES to as 
 *		to use the definition in xlate.h.
 *		Removed definition of MAX_CSET_SIZE to xlate.h.
 *	laf	 27-AUG-1986 14:44:11 Added xl_st.curchar.ul_avp =