123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133 |
- /* Copyright (C) 2001 Aladdin Enterprises. All rights reserved.
-
- This software is provided AS-IS with no warranty, either express or
- implied.
-
- This software is distributed under license and may not be copied,
- modified or distributed except as expressly authorized under the terms
- of the license contained in the file LICENSE in this distribution.
-
- For more information about licensing, please refer to
- http://www.ghostscript.com/licensing/. For information on
- commercial licensing, go to http://www.artifex.com/licensing/ or
- contact Artifex Software, Inc., 101 Lucas Valley Road #110,
- San Rafael, CA 94903, U.S.A., +1(415)492-9861.
- */
- /* $Id: gsgdata.c,v 1.3 2002/02/21 22:24:52 giles Exp $ */
- /* Support for glyph data access */
- #include "memory_.h"
- #include "gx.h"
- #include "gsgdata.h"
- #include "gserrors.h"
- #include "gsmatrix.h" /* for gsfont.h */
- #include "gsstruct.h"
- #include "gxfont.h"
- /* GC structure descriptor */
- private ENUM_PTRS_WITH(gs_glyph_data_enum_ptrs, gs_glyph_data_t *pgd)
- case 0: return ENUM_CONST_BYTESTRING(&pgd->bits);
- case 1: return ENUM_OBJ(pgd->proc_data);
- ENUM_PTRS_END
- private RELOC_PTRS_WITH(gs_glyph_data_reloc_ptrs, gs_glyph_data_t *pgd)
- {
- RELOC_CONST_BYTESTRING_VAR(pgd->bits);
- RELOC_OBJ_VAR(pgd->proc_data);
- } RELOC_PTRS_END
- gs_public_st_composite(st_glyph_data, gs_glyph_data_t, "gs_glyph_data_t",
- gs_glyph_data_enum_ptrs, gs_glyph_data_reloc_ptrs);
- /* ------ Client facilities ------ */
- /* Replace glyph data by a substring. */
- int
- gs_glyph_data_substring(gs_glyph_data_t *pgd, uint offset, uint size)
- {
- if (offset > pgd->bits.size || size > pgd->bits.size - offset)
- return_error(gs_error_rangecheck);
- return pgd->procs->substring(pgd, offset, size);
- }
- /* Free the data for a glyph. */
- void
- gs_glyph_data_free(gs_glyph_data_t *pgd, client_name_t cname)
- {
- pgd->procs->free(pgd, cname);
- gs_glyph_data_from_null(pgd);
- }
- /* ------ Implementor support ------ */
- /* Don't manage the glyph data. */
- private void
- glyph_data_free_permanent(gs_glyph_data_t *pgd, client_name_t cname)
- {
- }
- private int
- glyph_data_substring_permanent(gs_glyph_data_t *pgd, uint offset, uint size)
- {
- pgd->bits.data += offset;
- pgd->bits.size = size;
- return 0;
- }
- /* Manage the glyph data using the font's allocator. */
- private void
- glyph_data_free_by_font(gs_glyph_data_t *pgd, client_name_t cname)
- {
- gs_free_const_bytestring(((gs_font *)pgd->proc_data)->memory,
- &pgd->bits, cname);
- }
- private int
- glyph_data_substring_by_font(gs_glyph_data_t *pgd, uint offset, uint size)
- {
- gs_font *const font = pgd->proc_data;
- byte *data = (byte *)pgd->bits.data; /* break const */
- if (pgd->bits.bytes) /* object, not string */
- return glyph_data_substring_permanent(pgd, offset, size);
- if (offset > 0)
- memmove(data, data + offset, size);
- pgd->bits.data =
- gs_resize_string(font->memory, data, pgd->bits.size, size,
- "glyph_data_substring"); /* shortening, can't fail */
- pgd->bits.size = size;
- return 0;
- }
- private const gs_glyph_data_procs_t no_free_procs = {
- glyph_data_free_permanent, glyph_data_substring_permanent
- };
- private const gs_glyph_data_procs_t free_by_font_procs = {
- glyph_data_free_by_font, glyph_data_substring_by_font
- };
- /*
- * Initialize glyph data from a string or from bytes. If the font is NULL
- * (for glyph data that is part of the font), set the glyph data freeing
- * procedure to "do not free"; if the font is not NULL (for just-allocated
- * glyph data), set the freeing procedure to "free using the font's
- * allocator."
- */
- void
- gs_glyph_data_from_string(gs_glyph_data_t *pgd, const byte *data,
- uint size, gs_font *font)
- {
- gs_bytestring_from_string(&pgd->bits, data, size);
- pgd->proc_data = font;
- pgd->procs = (font ? &free_by_font_procs : &no_free_procs);
- }
- void
- gs_glyph_data_from_bytes(gs_glyph_data_t *pgd, const byte *bytes,
- uint offset, uint size, gs_font *font)
- {
- gs_bytestring_from_bytes(&pgd->bits, bytes, offset, size);
- pgd->proc_data = font;
- pgd->procs = (font ? &free_by_font_procs : &no_free_procs);
- }
- void
- gs_glyph_data_from_null(gs_glyph_data_t *pgd)
- {
- gs_glyph_data_from_string(pgd, NULL, 0, NULL);
- }
|