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[Emacs-diffs] Changes to w32uniscribe.c
|
From: |
Jason Rumney |
|
Subject: |
[Emacs-diffs] Changes to w32uniscribe.c |
|
Date: |
Thu, 03 Apr 2008 11:56:40 +0000 |
CVSROOT: /sources/emacs
Module name: emacs
Changes by: Jason Rumney <jasonr> 08/04/03 11:56:40
Index: w32uniscribe.c
===================================================================
RCS file: w32uniscribe.c
diff -N w32uniscribe.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ w32uniscribe.c 3 Apr 2008 11:56:40 -0000 1.1
@@ -0,0 +1,865 @@
+/* Font backend for the Microsoft W32 Uniscribe API.
+ Copyright (C) 2008 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+#ifdef USE_FONT_BACKEND
+
+#include <config.h>
+/* Override API version - Uniscribe is only available as standard since
+ Windows 2000, though most users of older systems will have it
+ since it installs with Internet Explorer 5.0 and other software.
+ We only enable the feature if it is available, so there is no chance
+ of calling non-existant functions. */
+#undef _WIN32_WINNT
+#define _WIN32_WINNT 0x500
+#include <windows.h>
+#include <usp10.h>
+
+#include "lisp.h"
+#include "w32term.h"
+#include "frame.h"
+#include "dispextern.h"
+#include "character.h"
+#include "charset.h"
+#include "fontset.h"
+#include "font.h"
+#include "w32font.h"
+
+struct uniscribe_font_info
+{
+ struct w32font_info w32_font;
+ SCRIPT_CACHE cache;
+};
+
+int uniscribe_available = 0;
+
+/* Defined in w32font.c, since it is required there as well. */
+extern Lisp_Object Quniscribe;
+extern Lisp_Object Qopentype;
+
+extern int initialized;
+
+extern struct font_driver uniscribe_font_driver;
+
+/* EnumFontFamiliesEx callback. */
+static int CALLBACK add_opentype_font_name_to_list P_ ((ENUMLOGFONTEX *,
+ NEWTEXTMETRICEX *,
+ DWORD, LPARAM));
+/* Used by uniscribe_otf_capability. */
+static Lisp_Object otf_features (HDC context, char *table);
+
+static int
+memq_no_quit (elt, list)
+ Lisp_Object elt, list;
+{
+ while (CONSP (list) && ! EQ (XCAR (list), elt))
+ list = XCDR (list);
+ return (CONSP (list));
+}
+
+
+/* Font backend interface implementation. */
+static Lisp_Object
+uniscribe_list (frame, font_spec)
+ Lisp_Object frame, font_spec;
+{
+ return w32font_list_internal (frame, font_spec, 1);
+}
+
+static Lisp_Object
+uniscribe_match (frame, font_spec)
+ Lisp_Object frame, font_spec;
+{
+ return w32font_match_internal (frame, font_spec, 1);
+}
+
+static Lisp_Object
+uniscribe_list_family (frame)
+ Lisp_Object frame;
+{
+ Lisp_Object list = Qnil;
+ LOGFONT font_match_pattern;
+ HDC dc;
+ FRAME_PTR f = XFRAME (frame);
+
+ bzero (&font_match_pattern, sizeof (font_match_pattern));
+ /* Limit enumerated fonts to outline fonts to save time. */
+ font_match_pattern.lfOutPrecision = OUT_OUTLINE_PRECIS;
+
+ dc = get_frame_dc (f);
+
+ EnumFontFamiliesEx (dc, &font_match_pattern,
+ (FONTENUMPROC) add_opentype_font_name_to_list,
+ (LPARAM) &list, 0);
+ release_frame_dc (f, dc);
+
+ return list;
+}
+
+static struct font *
+uniscribe_open (f, font_entity, pixel_size)
+ FRAME_PTR f;
+ Lisp_Object font_entity;
+ int pixel_size;
+{
+ struct uniscribe_font_info *uniscribe_font
+ = xmalloc (sizeof (struct uniscribe_font_info));
+
+ if (uniscribe_font == NULL)
+ return NULL;
+
+ if (!w32font_open_internal (f, font_entity, pixel_size,
+ (struct w32font_info *) uniscribe_font))
+ {
+ xfree (uniscribe_font);
+ return NULL;
+ }
+
+ /* Initialize the cache for this font. */
+ uniscribe_font->cache = NULL;
+ /* Mark the format as opentype */
+ uniscribe_font->w32_font.font.format = Qopentype;
+ uniscribe_font->w32_font.font.driver = &uniscribe_font_driver;
+
+ return (struct font *) uniscribe_font;
+}
+
+static void
+uniscribe_close (f, font)
+ FRAME_PTR f;
+ struct font *font;
+{
+ struct uniscribe_font_info *uniscribe_font
+ = (struct uniscribe_font_info *) font;
+
+ if (uniscribe_font->cache)
+ ScriptFreeCache (&uniscribe_font->cache);
+
+ w32font_close (f, font);
+}
+
+/* Return a list describing which scripts/languages FONT supports by
+ which GSUB/GPOS features of OpenType tables. */
+static Lisp_Object
+uniscribe_otf_capability (font)
+ struct font *font;
+{
+ HDC context;
+ HFONT old_font;
+ struct frame *f;
+ Lisp_Object capability = Fcons (Qnil, Qnil);
+ Lisp_Object features;
+
+ f = XFRAME (selected_frame);
+ context = get_frame_dc (f);
+ old_font = SelectObject (context,
+ ((W32FontStruct *) (font->font.font))->hfont);
+
+ features = otf_features (context, "GSUB");
+ XSETCAR (capability, features);
+ features = otf_features (context, "GPOS");
+ XSETCDR (capability, features);
+
+ SelectObject (context, old_font);
+ release_frame_dc (f, context);
+
+ return capability;
+}
+
+/* Uniscribe implementation of shape for font backend.
+
+ Shape text in LGSTRING. See the docstring of `font-make-gstring'
+ for the format of LGSTRING. If the (N+1)th element of LGSTRING
+ is nil, input of shaping is from the 1st to (N)th elements. In
+ each input glyph, FROM, TO, CHAR, and CODE are already set.
+
+ This function updates all fields of the input glyphs. If the
+ output glyphs (M) are more than the input glyphs (N), (N+1)th
+ through (M)th elements of LGSTRING are updated possibly by making
+ a new glyph object and storing it in LGSTRING. If (M) is greater
+ than the length of LGSTRING, nil should be return. In that case,
+ this function is called again with the larger LGSTRING. */
+static Lisp_Object
+uniscribe_shape (lgstring)
+ Lisp_Object lgstring;
+{
+ struct font * font;
+ struct uniscribe_font_info * uniscribe_font;
+ EMACS_UINT nchars;
+ int nitems, max_items, i, max_glyphs, done_glyphs, done_chars;
+ wchar_t *chars;
+ WORD *glyphs, *clusters;
+ SCRIPT_ITEM *items;
+ SCRIPT_CONTROL control;
+ SCRIPT_VISATTR *attributes;
+ int *advances;
+ GOFFSET *offsets;
+ ABC overall_metrics;
+ MAT2 transform;
+ HDC context;
+ HFONT old_font;
+ HRESULT result;
+ struct frame * f;
+
+ CHECK_FONT_GET_OBJECT (LGSTRING_FONT (lgstring), font);
+ uniscribe_font = (struct uniscribe_font_info *) font;
+
+ /* Get the chars from lgstring in a form we can use with uniscribe. */
+ max_glyphs = nchars = LGSTRING_LENGTH (lgstring);
+ done_glyphs = done_chars = 0;
+ chars = (wchar_t *) alloca (nchars * sizeof (wchar_t));
+ for (i = 0; i < nchars; i++)
+ {
+ /* lgstring can be bigger than the number of characters in it, in
+ the case where more glyphs are required to display those characters.
+ If that is the case, note the real number of characters. */
+ if (NILP (LGSTRING_GLYPH (lgstring, i)))
+ nchars = i;
+ else
+ chars[i] = LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, i));
+ }
+
+ /* First we need to break up the glyph string into runs of glyphs that
+ can be treated together. First try a single run. */
+ max_items = 2;
+ items = (SCRIPT_ITEM *) xmalloc (sizeof (SCRIPT_ITEM) * max_items);
+ bzero (&control, sizeof (control));
+
+ while ((result = ScriptItemize (chars, nchars, max_items, &control, NULL,
+ items, &nitems)) == E_OUTOFMEMORY)
+ {
+ /* If that wasn't enough, keep trying with one more run. */
+ max_items++;
+ items = (SCRIPT_ITEM *) xrealloc (items,
+ sizeof (SCRIPT_ITEM) * max_items);
+ }
+
+ /* 0 = success in Microsoft's backwards world. */
+ if (result)
+ {
+ xfree (items);
+ return Qnil;
+ }
+
+ f = XFRAME (selected_frame);
+ context = get_frame_dc (f);
+ old_font = SelectObject (context,
+ ((W32FontStruct *) (font->font.font))->hfont);
+
+ glyphs = alloca (max_glyphs * sizeof (WORD));
+ clusters = alloca (nchars * sizeof (WORD));
+ attributes = alloca (max_glyphs * sizeof (SCRIPT_VISATTR));
+ advances = alloca (max_glyphs * sizeof (int));
+ offsets = alloca (max_glyphs * sizeof (GOFFSET));
+ bzero (&transform, sizeof (transform));
+ transform.eM11.value = 1;
+ transform.eM22.value = 1;
+
+ for (i = 0; i < nitems; i++)
+ {
+ int nglyphs, nchars_in_run;
+ nchars_in_run = items[i+1].iCharPos - items[i].iCharPos;
+
+ result = ScriptShape (context, &(uniscribe_font->cache),
+ chars + items[i].iCharPos, nchars_in_run,
+ max_glyphs - done_glyphs, &(items[i].a),
+ glyphs, clusters, attributes, &nglyphs);
+ if (result == E_OUTOFMEMORY)
+ {
+ /* Need a bigger lgstring. */
+ lgstring = Qnil;
+ break;
+ }
+ else if (result)
+ {
+ /* Can't shape this run - return results so far if any. */
+ break;
+ }
+ else
+ {
+ result = ScriptPlace (context, &(uniscribe_font->cache),
+ glyphs, nglyphs, attributes, &(items[i].a),
+ advances, offsets, &overall_metrics);
+ if (!result)
+ {
+ int j, nclusters;
+
+ for (j = 0; j < nglyphs; j++)
+ {
+ int lglyph_index = j + done_glyphs;
+ Lisp_Object lglyph = LGSTRING_GLYPH (lgstring, lglyph_index);
+ GLYPHMETRICS metrics;
+
+ if (NILP (lglyph))
+ {
+ lglyph = Fmake_vector (make_number (LGLYPH_SIZE), Qnil);
+ LGSTRING_SET_GLYPH (lgstring, lglyph_index, lglyph);
+ }
+ LGLYPH_SET_CODE (lglyph, glyphs[j]);
+ LGLYPH_SET_WIDTH (lglyph, advances[j]);
+ if (offsets[j].du || offsets[j].dv)
+ {
+ Lisp_Object vec;
+ /* Convert from logical inches. */
+ int dpi = FRAME_W32_DISPLAY_INFO (f)->resy;
+ int dx = (int)(offsets[j].du * dpi / 72.27 + 0.5);
+ int dy = (int)(offsets[j].dv * dpi / 72.27 + 0.5);
+ vec = Fmake_vector (make_number (3), Qnil);
+ ASET (vec, 0, make_number (dx));
+ ASET (vec, 1, make_number (dy));
+ /* Based on what ftfont.c does... */
+ ASET (vec, 2, make_number (advances[j]));
+ LGLYPH_SET_ADJUSTMENT (lglyph, vec);
+ }
+ else
+ LGLYPH_SET_ADJUSTMENT (lglyph, Qnil);
+
+ if (GetGlyphOutlineW (context, glyphs[j],
+ GGO_METRICS | GGO_GLYPH_INDEX,
+ &metrics, 0, NULL, &transform)
+ != GDI_ERROR)
+ {
+ LGLYPH_SET_LBEARING (lglyph, metrics.gmptGlyphOrigin.x);
+ LGLYPH_SET_RBEARING (lglyph,
+ metrics.gmBlackBoxX
+ + metrics.gmptGlyphOrigin.x);
+ LGLYPH_SET_ASCENT (lglyph, metrics.gmBlackBoxY);
+ LGLYPH_SET_DESCENT (lglyph,
+ (metrics.gmCellIncY
+ - metrics.gmptGlyphOrigin.y
+ - metrics.gmBlackBoxY));
+ }
+ else
+ {
+ /* Defaults based on what we know from elsewhere. */
+ LGLYPH_SET_LBEARING (lglyph, 0);
+ LGLYPH_SET_RBEARING (lglyph, advances[j]);
+ LGLYPH_SET_ASCENT (lglyph, font->ascent);
+ LGLYPH_SET_DESCENT (lglyph, font->descent);
+ }
+ }
+
+ /* Set character codes as indicated in clusters. */
+ for (j = 0; j < nchars_in_run - 1; j++)
+ {
+ int k, start, end;
+ wchar_t this_char = *(chars + items[i].iCharPos + j);
+
+ start = clusters[i];
+ end = clusters[i+1];
+ if (start > end)
+ {
+ int temp = start;
+ start = end;
+ end = temp;
+ }
+ for (k = start; k < end; k++)
+ {
+ Lisp_Object lglyph = LGSTRING_GLYPH (lgstring,
+ done_glyphs + k);
+ LGLYPH_SET_CHAR (lglyph, this_char);
+ }
+ }
+ /* Last one until end (or beginning) of string. */
+ {
+ int k, start, end;
+ wchar_t last_char = *(chars + items[i].iCharPos
+ + nchars_in_run - 1);
+ start = clusters[nchars_in_run - 1];
+ end = nglyphs;
+ if (start < clusters[nchars_in_run - 2])
+ {
+ end = start + 1;
+ start = 0;
+ }
+ for (k = start; k < end; k++)
+ {
+ Lisp_Object lglyph = LGSTRING_GLYPH (lgstring,
+ done_glyphs + k);
+ LGLYPH_SET_CHAR (lglyph, last_char);
+ }
+ }
+ }
+ }
+ done_glyphs += nglyphs;
+ done_chars += nchars_in_run;
+ }
+
+ xfree (items);
+ SelectObject (context, old_font);
+ release_frame_dc (f, context);
+
+ if (NILP (lgstring))
+ return Qnil;
+ else
+ return make_number (done_chars);
+}
+
+/* Uniscribe implementation of encode_char for font backend.
+ Return a glyph code of FONT for characer C (Unicode code point).
+ If FONT doesn't have such a glyph, return FONT_INVALID_CODE. */
+static unsigned
+uniscribe_encode_char (font, c)
+ struct font *font;
+ int c;
+{
+ wchar_t chars[1];
+ WORD indices[1];
+ HDC context;
+ struct frame *f;
+ HFONT old_font;
+ DWORD retval;
+
+ /* TODO: surrogates. */
+ if (c > 0xFFFF)
+ return FONT_INVALID_CODE;
+
+ chars[0] = (wchar_t) c;
+
+ /* Use selected frame until API is updated to pass the frame. */
+ f = XFRAME (selected_frame);
+ context = get_frame_dc (f);
+ old_font = SelectObject (context,
+ ((W32FontStruct *)(font->font.font))->hfont);
+
+ retval = GetGlyphIndicesW (context, chars, 1, indices,
+ GGI_MARK_NONEXISTING_GLYPHS);
+
+ SelectObject (context, old_font);
+ release_frame_dc (f, context);
+
+ if (retval == 1)
+ return indices[0] == 0xFFFF ? FONT_INVALID_CODE : indices[0];
+ else
+ return FONT_INVALID_CODE;
+}
+
+/*
+ Shared with w32font:
+ Lisp_Object uniscribe_get_cache (Lisp_Object frame);
+ void uniscribe_free_entity (Lisp_Object font_entity);
+ int uniscribe_has_char (Lisp_Object entity, int c);
+ int uniscribe_text_extents (struct font *font, unsigned *code,
+ int nglyphs, struct font_metrics *metrics);
+ int uniscribe_draw (struct glyph_string *s, int from, int to,
+ int x, int y, int with_background);
+
+ Unused:
+ int uniscribe_prepare_face (FRAME_PTR f, struct face *face);
+ void uniscribe_done_face (FRAME_PTR f, struct face *face);
+ int uniscribe_get_bitmap (struct font *font, unsigned code,
+ struct font_bitmap *bitmap, int bits_per_pixel);
+ void uniscribe_free_bitmap (struct font *font, struct font_bitmap *bitmap);
+ void * uniscribe_get_outline (struct font *font, unsigned code);
+ void uniscribe_free_outline (struct font *font, void *outline);
+ int uniscribe_anchor_point (struct font *font, unsigned code,
+ int index, int *x, int *y);
+ int uniscribe_start_for_frame (FRAME_PTR f);
+ int uniscribe_end_for_frame (FRAME_PTR f);
+
+*/
+
+
+/* Callback function for EnumFontFamiliesEx.
+ Adds the name of opentype fonts to a Lisp list (passed in as the
+ lParam arg). */
+static int CALLBACK
+add_opentype_font_name_to_list (logical_font, physical_font, font_type,
+ list_object)
+ ENUMLOGFONTEX *logical_font;
+ NEWTEXTMETRICEX *physical_font;
+ DWORD font_type;
+ LPARAM list_object;
+{
+ Lisp_Object* list = (Lisp_Object *) list_object;
+ Lisp_Object family;
+
+ /* Skip vertical fonts (intended only for printing) */
+ if (logical_font->elfLogFont.lfFaceName[0] == '@')
+ return 1;
+
+ /* Skip non opentype fonts. Count old truetype fonts as opentype,
+ as some of them do contain GPOS and GSUB data that Uniscribe
+ can make use of. */
+ if (!(physical_font->ntmTm.ntmFlags & NTMFLAGS_OPENTYPE)
+ && font_type != TRUETYPE_FONTTYPE)
+ return 1;
+
+ family = intern_downcase (logical_font->elfLogFont.lfFaceName,
+ strlen (logical_font->elfLogFont.lfFaceName));
+ if (! memq_no_quit (family, *list))
+ *list = Fcons (family, *list);
+
+ return 1;
+}
+
+
+/* :otf property handling.
+ Since the necessary Uniscribe APIs for getting font tag information
+ are only available in Vista, we need to parse the font data directly
+ according to the OpenType Specification. */
+
+/* Push into DWORD backwards to cope with endianness. */
+#define OTF_TAG(STR) \
+ ((STR[3] << 24) | (STR[2] << 16) | (STR[1] << 8) | STR[0])
+
+#define OTF_INT16_VAL(TABLE, OFFSET, PTR) \
+ do { \
+ BYTE temp, data[2]; \
+ if (GetFontData (context, TABLE, OFFSET, data, 2) != 2) \
+ goto font_table_error; \
+ temp = data[0], data[0] = data[1], data[1] = temp; \
+ memcpy (PTR, data, 2); \
+ } while (0)
+
+/* Do not reverse the bytes, because we will compare with a OTF_TAG value
+ that has them reversed already. */
+#define OTF_DWORDTAG_VAL(TABLE, OFFSET, PTR) \
+ do { \
+ if (GetFontData (context, TABLE, OFFSET, PTR, 4) != 4) \
+ goto font_table_error; \
+ } while (0)
+
+#define OTF_TAG_VAL(TABLE, OFFSET, STR) \
+ do { \
+ if (GetFontData (context, TABLE, OFFSET, STR, 4) != 4) \
+ goto font_table_error; \
+ STR[4] = '\0'; \
+ } while (0)
+
+static char* NOTHING = " ";
+
+#define SNAME(VAL) SDATA (STRINGP (VAL) ? VAL : SYMBOL_NAME (VAL))
+
+/* Check if font supports the otf script/language/features specified.
+ OTF_SPEC is in the format
+ (script lang [(gsub_feature ...)|nil] [(gpos_feature ...)]?) */
+int uniscribe_check_otf (font, otf_spec)
+ LOGFONT *font;
+ Lisp_Object otf_spec;
+{
+ Lisp_Object script, lang, rest;
+ Lisp_Object features[2];
+ DWORD feature_tables[2];
+ DWORD script_tag, default_script, lang_tag = 0;
+ struct frame * f;
+ HDC context;
+ HFONT check_font, old_font;
+ DWORD table;
+ int i, retval = 0;
+
+ /* Break otf_spec into its components. */
+ script = XCAR (otf_spec);
+ rest = XCDR (otf_spec);
+
+ lang = XCAR (rest);
+ rest = XCDR (rest);
+
+ features[0] = XCAR (rest);
+ rest = XCDR (rest);
+ if (NILP (rest))
+ features[1] = Qnil;
+ else
+ features[1] = XCAR (rest);
+
+ /* Set up tags we will use in the search. */
+ feature_tables[0] = OTF_TAG ("GSUB");
+ feature_tables[1] = OTF_TAG ("GPOS");
+ default_script = OTF_TAG ("DFLT");
+ if (NILP (script))
+ script_tag = default_script;
+ else
+ script_tag = OTF_TAG (SNAME (script));
+ if (!NILP (lang))
+ lang_tag = OTF_TAG (SNAME (lang));
+
+ /* Set up graphics context so we can use the font. */
+ f = XFRAME (selected_frame);
+ context = get_frame_dc (f);
+ check_font = CreateFontIndirect (font);
+ old_font = SelectObject (context, check_font);
+
+ /* Scan GSUB and GPOS tables. */
+ for (i = 0; i < 2; i++)
+ {
+ int j, n_match_features;
+ unsigned short scriptlist_table, feature_table, n_scripts;
+ unsigned short script_table, langsys_table, n_langs;
+ unsigned short feature_index, n_features;
+ DWORD tbl = feature_tables[i];
+ Lisp_Object feature;
+
+ /* Skip if no features requested from this table. */
+ if (NILP (features[i]))
+ continue;
+
+ /* Read GPOS/GSUB header. */
+ OTF_INT16_VAL (tbl, 4, &scriptlist_table);
+ OTF_INT16_VAL (tbl, 6, &feature_table);
+ OTF_INT16_VAL (tbl, scriptlist_table, &n_scripts);
+
+ /* Find the appropriate script table. */
+ script_table = 0;
+ for (j = 0; j < n_scripts; j++)
+ {
+ DWORD script_id;
+ OTF_DWORDTAG_VAL (tbl, scriptlist_table + 2 + j * 6, &script_id);
+ if (script_id == script_tag)
+ {
+ OTF_INT16_VAL (tbl, scriptlist_table + 6 + j * 6, &script_table);
+ break;
+ }
+ /* If there is a DFLT script defined in the font, use it
+ if the specified script is not found. */
+ else if (script_id == default_script)
+ OTF_INT16_VAL (tbl, scriptlist_table + 6 + j * 6, &script_table);
+ }
+ /* If no specific or default script table was found, then this font
+ does not support the script. */
+ if (!script_table)
+ goto no_support;
+
+ /* Offset is from beginning of scriptlist_table. */
+ script_table += scriptlist_table;
+
+ /* Get default langsys table. */
+ OTF_INT16_VAL (tbl, script_table, &langsys_table);
+
+ /* If lang was specified, see if font contains a specific entry. */
+ if (!NILP (lang))
+ {
+ OTF_INT16_VAL (tbl, script_table + 2, &n_langs);
+
+ for (j = 0; j < n_langs; j++)
+ {
+ DWORD lang_id;
+ OTF_DWORDTAG_VAL (tbl, script_table + 4 + j * 6, &lang_id);
+ if (lang_id == lang_tag)
+ {
+ OTF_INT16_VAL (tbl, script_table + 8 + j * 6, &langsys_table);
+ break;
+ }
+ }
+ }
+
+ if (!langsys_table)
+ goto no_support;
+
+ /* Offset is from beginning of script table. */
+ langsys_table += script_table;
+
+ /* Check the features. Features may contain nil according to
+ documentation in font_prop_validate_otf, so count them. */
+ n_match_features = 0;
+ rest = features[i];
+ for (feature = XCAR (rest); CONSP (rest); feature = XCAR (rest))
+ {
+ rest = XCDR (rest);
+ if (!NILP (feature))
+ n_match_features++;
+ }
+
+ /* If there are no features to check, skip checking. */
+ if (!n_match_features)
+ continue;
+
+ /* First check required feature (if any). */
+ OTF_INT16_VAL (tbl, langsys_table + 2, &feature_index);
+ if (feature_index != 0xFFFF)
+ {
+ char feature_id[5];
+ OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id);
+ OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id);
+ /* Assume no duplicates in the font table. This allows us to mark
+ the features off by simply decrementing a counter. */
+ if (!NILP (Fmemq (intern (feature_id), features[i])))
+ n_match_features--;
+ }
+ /* Now check all the other features. */
+ OTF_INT16_VAL (tbl, langsys_table + 4, &n_features);
+ for (j = 0; j < n_features; j++)
+ {
+ char feature_id[5];
+ OTF_INT16_VAL (tbl, langsys_table + 6 + j * 2, &feature_index);
+ OTF_TAG_VAL (tbl, feature_table + 2 + feature_index * 6, feature_id);
+ /* Assume no duplicates in the font table. This allows us to mark
+ the features off by simply decrementing a counter. */
+ if (!NILP (Fmemq (intern (feature_id), features[i])))
+ n_match_features--;
+ }
+
+ if (n_match_features > 0)
+ goto no_support;
+ }
+
+ retval = 1;
+
+ no_support:
+ font_table_error:
+ /* restore graphics context. */
+ SelectObject (context, old_font);
+ DeleteObject (check_font);
+ release_frame_dc (f, context);
+
+ return retval;
+}
+
+static Lisp_Object
+otf_features (HDC context, char *table)
+{
+ Lisp_Object script_list = Qnil;
+ unsigned short scriptlist_table, n_scripts, feature_table;
+ DWORD tbl = OTF_TAG (table);
+ int i, j, k;
+
+ /* Look for scripts in the table. */
+ OTF_INT16_VAL (tbl, 4, &scriptlist_table);
+ OTF_INT16_VAL (tbl, 6, &feature_table);
+ OTF_INT16_VAL (tbl, scriptlist_table, &n_scripts);
+
+ for (i = 0; i < n_scripts; i++)
+ {
+ char script[5], lang[5];
+ unsigned short script_table, lang_count, langsys_table, feature_count;
+ Lisp_Object script_tag, langsys_list, langsys_tag, feature_list;
+ unsigned short record_offset = scriptlist_table + 2 + i * 6;
+ OTF_TAG_VAL (tbl, record_offset, script);
+ OTF_INT16_VAL (tbl, record_offset + 4, &script_table);
+
+ /* Offset is from beginning of script table. */
+ script_table += scriptlist_table;
+
+ script_tag = intern (script);
+ langsys_list = Qnil;
+
+ /* Optional default lang. */
+ OTF_INT16_VAL (tbl, script_table, &langsys_table);
+ if (langsys_table)
+ {
+ /* Offset is from beginning of script table. */
+ langsys_table += script_table;
+
+ langsys_tag = Qnil;
+ feature_list = Qnil;
+ OTF_INT16_VAL (tbl, langsys_table + 4, &feature_count);
+ for (k = 0; k < feature_count; k++)
+ {
+ char feature[5];
+ unsigned short index;
+ OTF_INT16_VAL (tbl, langsys_table + 6 + k * 2, &index);
+ OTF_TAG_VAL (tbl, feature_table + 2 + index * 6, feature);
+ feature_list = Fcons (intern (feature), feature_list);
+ }
+ langsys_list = Fcons (Fcons (langsys_tag, feature_list),
+ langsys_list);
+ }
+
+ /* List of supported languages. */
+ OTF_INT16_VAL (tbl, script_table + 2, &lang_count);
+
+ for (j = 0; j < lang_count; j++)
+ {
+ record_offset = script_table + 4 + j * 6;
+ OTF_TAG_VAL (tbl, record_offset, lang);
+ OTF_INT16_VAL (tbl, record_offset + 4, &langsys_table);
+
+ /* Offset is from beginning of script table. */
+ langsys_table += script_table;
+
+ langsys_tag = intern (lang);
+ feature_list = Qnil;
+ OTF_INT16_VAL (tbl, langsys_table + 4, &feature_count);
+ for (k = 0; k < feature_count; k++)
+ {
+ char feature[5];
+ unsigned short index;
+ OTF_INT16_VAL (tbl, langsys_table + 6 + k * 2, &index);
+ OTF_TAG_VAL (tbl, feature_table + 2 + index * 6, feature);
+ feature_list = Fcons (intern (feature), feature_list);
+ }
+ langsys_list = Fcons (Fcons (langsys_tag, feature_list),
+ langsys_list);
+
+ }
+
+ script_list = Fcons (Fcons (script_tag, langsys_list), script_list);
+ }
+
+ return script_list;
+
+font_table_error:
+ return Qnil;
+}
+
+#undef OTF_INT16_VAL
+#undef OTF_TAG_VAL
+#undef OTF_TAG
+
+
+struct font_driver uniscribe_font_driver =
+ {
+ 0, /* Quniscribe */
+ w32font_get_cache,
+ uniscribe_list,
+ uniscribe_match,
+ uniscribe_list_family,
+ NULL, /* free_entity */
+ uniscribe_open,
+ uniscribe_close,
+ NULL, /* prepare_face */
+ NULL, /* done_face */
+ w32font_has_char,
+ uniscribe_encode_char,
+ w32font_text_extents,
+ w32font_draw,
+ NULL, /* get_bitmap */
+ NULL, /* free_bitmap */
+ NULL, /* get_outline */
+ NULL, /* free_outline */
+ NULL, /* anchor_point */
+ uniscribe_otf_capability, /* Defined so (font-get FONTOBJ :otf) works. */
+ NULL, /* otf_drive - use shape instead. */
+ NULL, /* start_for_frame */
+ NULL, /* end_for_frame */
+ uniscribe_shape
+ };
+
+/* Note that this should be called at every startup, not just when dumping,
+ as it needs to test for the existence of the Uniscribe library. */
+void
+syms_of_w32uniscribe ()
+{
+ HMODULE uniscribe;
+
+ /* Don't init uniscribe when dumping */
+ if (!initialized)
+ return;
+
+ /* Don't register if uniscribe is not available. */
+ uniscribe = GetModuleHandle ("usp10");
+ if (!uniscribe)
+ return;
+
+ uniscribe_font_driver.type = Quniscribe;
+ uniscribe_available = 1;
+
+ register_font_driver (&uniscribe_font_driver, NULL);
+}
+
+#endif /* USE_FONT_BACKEND */
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Jason Rumney <=