524 lines
14 KiB
C++
524 lines
14 KiB
C++
/*
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* Copyright © 2011,2012 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#define _WIN32_WINNT 0x0600
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#define HB_SHAPER uniscribe
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#include "hb-shaper-impl-private.hh"
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#include <windows.h>
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#include <usp10.h>
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typedef ULONG WIN_ULONG;
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#include "hb-uniscribe.h"
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#include "hb-ot-name-table.hh"
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#include "hb-ot-tag.h"
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#ifndef HB_DEBUG_UNISCRIBE
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#define HB_DEBUG_UNISCRIBE (HB_DEBUG+0)
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#endif
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/*
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DWORD GetFontData(
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__in HDC hdc,
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__in DWORD dwTable,
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__in DWORD dwOffset,
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__out LPVOID lpvBuffer,
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__in DWORD cbData
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);
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*/
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static bool
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populate_log_font (LOGFONTW *lf,
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hb_font_t *font)
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{
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memset (lf, 0, sizeof (*lf));
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lf->lfHeight = -font->y_scale;
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lf->lfCharSet = DEFAULT_CHARSET;
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hb_blob_t *blob = Sanitizer<name>::sanitize (hb_face_reference_table (font->face, HB_TAG ('n','a','m','e')));
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const name *name_table = Sanitizer<name>::lock_instance (blob);
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unsigned int len = name_table->get_name (3, 1, 0x409, 4,
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lf->lfFaceName,
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sizeof (lf->lfFaceName[0]) * LF_FACESIZE)
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/ sizeof (lf->lfFaceName[0]);
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hb_blob_destroy (blob);
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if (unlikely (!len)) {
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DEBUG_MSG (UNISCRIBE, NULL, "Didn't find English name table entry");
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return false;
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}
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if (unlikely (len >= LF_FACESIZE)) {
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DEBUG_MSG (UNISCRIBE, NULL, "Font name too long");
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return false;
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}
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for (unsigned int i = 0; i < len; i++)
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lf->lfFaceName[i] = hb_be_uint16 (lf->lfFaceName[i]);
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lf->lfFaceName[len] = 0;
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return true;
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}
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/*
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* shaper face data
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*/
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struct hb_uniscribe_shaper_face_data_t {
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HANDLE fh;
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};
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hb_uniscribe_shaper_face_data_t *
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_hb_uniscribe_shaper_face_data_create (hb_face_t *face)
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{
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hb_uniscribe_shaper_face_data_t *data = (hb_uniscribe_shaper_face_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_face_data_t));
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if (unlikely (!data))
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return NULL;
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hb_blob_t *blob = hb_face_reference_blob (face);
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unsigned int blob_length;
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const char *blob_data = hb_blob_get_data (blob, &blob_length);
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if (unlikely (!blob_length))
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DEBUG_MSG (UNISCRIBE, face, "Face has empty blob");
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DWORD num_fonts_installed;
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data->fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed);
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hb_blob_destroy (blob);
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if (unlikely (!data->fh)) {
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DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed");
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free (data);
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return NULL;
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}
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return data;
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}
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void
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_hb_uniscribe_shaper_face_data_destroy (hb_uniscribe_shaper_face_data_t *data)
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{
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if (data->fh)
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RemoveFontMemResourceEx (data->fh);
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free (data);
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}
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/*
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* shaper font data
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*/
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struct hb_uniscribe_shaper_font_data_t {
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HDC hdc;
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LOGFONTW log_font;
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HFONT hfont;
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SCRIPT_CACHE script_cache;
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};
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hb_uniscribe_shaper_font_data_t *
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_hb_uniscribe_shaper_font_data_create (hb_font_t *font)
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{
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hb_uniscribe_shaper_font_data_t * data = (hb_uniscribe_shaper_font_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_font_data_t));
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if (unlikely (!data))
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return NULL;
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data->hdc = GetDC (NULL);
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if (unlikely (!populate_log_font (&data->log_font, font))) {
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DEBUG_MSG (UNISCRIBE, font, "Font populate_log_font() failed");
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_hb_uniscribe_shaper_font_data_destroy (data);
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return NULL;
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}
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data->hfont = CreateFontIndirectW (&data->log_font);
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if (unlikely (!data->hfont)) {
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DEBUG_MSG (UNISCRIBE, font, "Font CreateFontIndirectW() failed");
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_hb_uniscribe_shaper_font_data_destroy (data);
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return NULL;
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}
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if (!SelectObject (data->hdc, data->hfont)) {
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DEBUG_MSG (UNISCRIBE, font, "Font SelectObject() failed");
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_hb_uniscribe_shaper_font_data_destroy (data);
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return NULL;
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}
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return data;
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}
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void
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_hb_uniscribe_shaper_font_data_destroy (hb_uniscribe_shaper_font_data_t *data)
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{
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if (data->hdc)
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ReleaseDC (NULL, data->hdc);
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if (data->hfont)
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DeleteObject (data->hfont);
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if (data->script_cache)
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ScriptFreeCache (&data->script_cache);
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free (data);
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}
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/*
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* shaper shape_plan data
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*/
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struct hb_uniscribe_shaper_shape_plan_data_t {};
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hb_uniscribe_shaper_shape_plan_data_t *
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_hb_uniscribe_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan)
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{
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return (hb_uniscribe_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
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}
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void
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_hb_uniscribe_shaper_shape_plan_data_destroy (hb_uniscribe_shaper_shape_plan_data_t *data)
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{
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}
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/*
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* shaper
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*/
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static hb_user_data_key_t hb_uniscribe_data_key;
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static hb_uniscribe_shaper_face_data_t *
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_hb_uniscribe_face_get_data (hb_face_t *face)
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{
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hb_uniscribe_shaper_face_data_t *data = (hb_uniscribe_shaper_face_data_t *) hb_face_get_user_data (face, &hb_uniscribe_data_key);
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if (likely (data)) return data;
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data = _hb_uniscribe_shaper_face_data_create (face);
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if (!data) return NULL;
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if (unlikely (!hb_face_set_user_data (face, &hb_uniscribe_data_key, data,
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(hb_destroy_func_t) _hb_uniscribe_shaper_face_data_destroy,
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false)))
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{
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_hb_uniscribe_shaper_face_data_destroy (data);
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data = (hb_uniscribe_shaper_face_data_t *) hb_face_get_user_data (face, &hb_uniscribe_data_key);
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}
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return data;
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}
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static hb_uniscribe_shaper_font_data_t *
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_hb_uniscribe_font_get_data (hb_font_t *font)
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{
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hb_uniscribe_shaper_font_data_t *data = (hb_uniscribe_shaper_font_data_t *) hb_font_get_user_data (font, &hb_uniscribe_data_key);
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if (likely (data)) return data;
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data = _hb_uniscribe_shaper_font_data_create (font);
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if (unlikely (!data))
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return NULL;
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if (unlikely (!hb_font_set_user_data (font, &hb_uniscribe_data_key, data,
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(hb_destroy_func_t) _hb_uniscribe_shaper_font_data_destroy,
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false)))
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{
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_hb_uniscribe_shaper_font_data_destroy (data);
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data = (hb_uniscribe_shaper_font_data_t *) hb_font_get_user_data (font, &hb_uniscribe_data_key);
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}
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return data;
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}
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LOGFONTW *
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hb_uniscribe_font_get_logfontw (hb_font_t *font)
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{
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hb_uniscribe_shaper_font_data_t *font_data = _hb_uniscribe_font_get_data (font);
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if (unlikely (!font_data))
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return NULL;
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return &font_data->log_font;
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}
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HFONT
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hb_uniscribe_font_get_hfont (hb_font_t *font)
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{
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hb_uniscribe_shaper_font_data_t *font_data = _hb_uniscribe_font_get_data (font);
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if (unlikely (!font_data))
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return 0;
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return font_data->hfont;
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}
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hb_bool_t
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_hb_uniscribe_shape (hb_shape_plan_t *shape_plan,
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hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features,
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unsigned int num_features)
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{
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buffer->guess_properties ();
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#define FAIL(...) \
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HB_STMT_START { \
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DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
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return false; \
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} HB_STMT_END;
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hb_uniscribe_shaper_face_data_t *face_data = _hb_uniscribe_face_get_data (font->face);
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if (unlikely (!face_data->fh))
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FAIL ("Couldn't get face data");
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hb_uniscribe_shaper_font_data_t *font_data = _hb_uniscribe_font_get_data (font);
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if (unlikely (!font_data->hfont))
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FAIL ("Couldn't get font font");
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if (unlikely (!buffer->len))
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return true;
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HRESULT hr;
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retry:
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unsigned int scratch_size;
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char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
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/* Allocate char buffers; they all fit */
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#define ALLOCATE_ARRAY(Type, name, len) \
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Type *name = (Type *) scratch; \
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scratch += (len) * sizeof ((name)[0]); \
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scratch_size -= (len) * sizeof ((name)[0]);
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#define utf16_index() var1.u32
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WCHAR *pchars = (WCHAR *) scratch;
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unsigned int chars_len = 0;
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for (unsigned int i = 0; i < buffer->len; i++) {
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hb_codepoint_t c = buffer->info[i].codepoint;
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buffer->info[i].utf16_index() = chars_len;
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if (likely (c < 0x10000))
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pchars[chars_len++] = c;
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else if (unlikely (c >= 0x110000))
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pchars[chars_len++] = 0xFFFD;
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else {
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pchars[chars_len++] = 0xD800 + ((c - 0x10000) >> 10);
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pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1));
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}
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}
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ALLOCATE_ARRAY (WCHAR, wchars, chars_len);
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ALLOCATE_ARRAY (WORD, log_clusters, chars_len);
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ALLOCATE_ARRAY (SCRIPT_CHARPROP, char_props, chars_len);
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/* On Windows, we don't care about alignment...*/
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unsigned int glyphs_size = scratch_size / (sizeof (WORD) +
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sizeof (SCRIPT_GLYPHPROP) +
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sizeof (int) +
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sizeof (GOFFSET) +
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sizeof (uint32_t));
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ALLOCATE_ARRAY (WORD, glyphs, glyphs_size);
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ALLOCATE_ARRAY (SCRIPT_GLYPHPROP, glyph_props, glyphs_size);
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ALLOCATE_ARRAY (int, advances, glyphs_size);
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ALLOCATE_ARRAY (GOFFSET, offsets, glyphs_size);
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ALLOCATE_ARRAY (uint32_t, vis_clusters, glyphs_size);
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#undef ALLOCATE_ARRAY
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#define MAX_ITEMS 256
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SCRIPT_ITEM items[MAX_ITEMS + 1];
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SCRIPT_CONTROL bidi_control = {0};
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SCRIPT_STATE bidi_state = {0};
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WIN_ULONG script_tags[MAX_ITEMS];
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int item_count;
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/* MinGW32 doesn't define fMergeNeutralItems, so we bruteforce */
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//bidi_control.fMergeNeutralItems = true;
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*(uint32_t*)&bidi_control |= 1<<24;
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bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
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bidi_state.fOverrideDirection = 1;
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hr = ScriptItemizeOpenType (wchars,
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chars_len,
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MAX_ITEMS,
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&bidi_control,
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&bidi_state,
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items,
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script_tags,
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&item_count);
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if (unlikely (FAILED (hr)))
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FAIL ("ScriptItemizeOpenType() failed: 0x%08xL", hr);
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#undef MAX_ITEMS
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int *range_char_counts = NULL;
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TEXTRANGE_PROPERTIES **range_properties = NULL;
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int range_count = 0;
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if (num_features) {
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/* TODO setup ranges */
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}
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OPENTYPE_TAG language_tag = hb_uint32_swap (hb_ot_tag_from_language (buffer->props.language));
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unsigned int glyphs_offset = 0;
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unsigned int glyphs_len;
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bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
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for (unsigned int j = 0; j < item_count; j++)
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{
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unsigned int i = backward ? item_count - 1 - j : j;
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unsigned int chars_offset = items[i].iCharPos;
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unsigned int item_chars_len = items[i + 1].iCharPos - chars_offset;
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retry_shape:
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hr = ScriptShapeOpenType (font_data->hdc,
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&font_data->script_cache,
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&items[i].a,
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script_tags[i],
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language_tag,
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range_char_counts,
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range_properties,
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range_count,
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wchars + chars_offset,
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item_chars_len,
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glyphs_size - glyphs_offset,
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/* out */
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log_clusters + chars_offset,
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char_props + chars_offset,
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glyphs + glyphs_offset,
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glyph_props + glyphs_offset,
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(int *) &glyphs_len);
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if (unlikely (items[i].a.fNoGlyphIndex))
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FAIL ("ScriptShapeOpenType() set fNoGlyphIndex");
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if (unlikely (hr == E_OUTOFMEMORY))
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{
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buffer->ensure (buffer->allocated * 2);
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if (buffer->in_error)
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FAIL ("Buffer resize failed");
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goto retry;
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}
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if (unlikely (hr == USP_E_SCRIPT_NOT_IN_FONT))
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{
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if (items[i].a.eScript == SCRIPT_UNDEFINED)
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FAIL ("ScriptShapeOpenType() failed: Font doesn't support script");
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items[i].a.eScript = SCRIPT_UNDEFINED;
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goto retry_shape;
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}
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if (unlikely (FAILED (hr)))
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{
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FAIL ("ScriptShapeOpenType() failed: 0x%08xL", hr);
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}
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for (unsigned int j = chars_offset; j < chars_offset + item_chars_len; j++)
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log_clusters[j] += glyphs_offset;
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hr = ScriptPlaceOpenType (font_data->hdc,
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&font_data->script_cache,
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&items[i].a,
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script_tags[i],
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language_tag,
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range_char_counts,
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range_properties,
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range_count,
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wchars + chars_offset,
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log_clusters + chars_offset,
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char_props + chars_offset,
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item_chars_len,
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glyphs + glyphs_offset,
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glyph_props + glyphs_offset,
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glyphs_len,
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/* out */
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advances + glyphs_offset,
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offsets + glyphs_offset,
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NULL);
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if (unlikely (FAILED (hr)))
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FAIL ("ScriptPlaceOpenType() failed: 0x%08xL", hr);
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glyphs_offset += glyphs_len;
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}
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glyphs_len = glyphs_offset;
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/* Ok, we've got everything we need, now compose output buffer,
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* very, *very*, carefully! */
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/* Calculate visual-clusters. That's what we ship. */
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for (unsigned int i = 0; i < glyphs_len; i++)
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vis_clusters[i] = -1;
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for (unsigned int i = 0; i < buffer->len; i++) {
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uint32_t *p = &vis_clusters[log_clusters[buffer->info[i].utf16_index()]];
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*p = MIN (*p, buffer->info[i].cluster);
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}
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if (!backward) {
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for (unsigned int i = 1; i < glyphs_len; i++)
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if (vis_clusters[i] == -1)
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vis_clusters[i] = vis_clusters[i - 1];
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} else {
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for (int i = glyphs_len - 2; i >= 0; i--)
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if (vis_clusters[i] == -1)
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vis_clusters[i] = vis_clusters[i + 1];
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}
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#undef utf16_index
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buffer->ensure (glyphs_len);
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if (buffer->in_error)
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FAIL ("Buffer in error");
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#undef FAIL
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/* Set glyph infos */
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buffer->len = 0;
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for (unsigned int i = 0; i < glyphs_len; i++)
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{
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hb_glyph_info_t *info = &buffer->info[buffer->len++];
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|
|
info->codepoint = glyphs[i];
|
|
info->cluster = vis_clusters[i];
|
|
|
|
/* The rest is crap. Let's store position info there for now. */
|
|
info->mask = advances[i];
|
|
info->var1.u32 = offsets[i].du;
|
|
info->var2.u32 = offsets[i].dv;
|
|
}
|
|
|
|
/* Set glyph positions */
|
|
buffer->clear_positions ();
|
|
for (unsigned int i = 0; i < glyphs_len; i++)
|
|
{
|
|
hb_glyph_info_t *info = &buffer->info[i];
|
|
hb_glyph_position_t *pos = &buffer->pos[i];
|
|
|
|
/* TODO vertical */
|
|
pos->x_advance = info->mask;
|
|
pos->x_offset = info->var1.u32;
|
|
pos->y_offset = info->var2.u32;
|
|
}
|
|
|
|
/* Wow, done! */
|
|
return true;
|
|
}
|
|
|
|
|