harfbuzz/src/hb-uniscribe.cc

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/*
* Copyright © 2011,2012 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#define _WIN32_WINNT 0x0600
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#define WIN32_LEAN_AND_MEAN
#define HB_SHAPER uniscribe
#include "hb-shaper-impl-private.hh"
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#include <windows.h>
#include <usp10.h>
#include <rpc.h>
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#include "hb-uniscribe.h"
#include "hb-open-file-private.hh"
#include "hb-ot-name-table.hh"
#include "hb-ot-tag.h"
#ifndef HB_DEBUG_UNISCRIBE
#define HB_DEBUG_UNISCRIBE (HB_DEBUG+0)
#endif
typedef HRESULT (WINAPI *SIOT) /*ScriptItemizeOpenType*/(
const WCHAR *pwcInChars,
int cInChars,
int cMaxItems,
const SCRIPT_CONTROL *psControl,
const SCRIPT_STATE *psState,
SCRIPT_ITEM *pItems,
OPENTYPE_TAG *pScriptTags,
int *pcItems
);
typedef HRESULT (WINAPI *SSOT) /*ScriptShapeOpenType*/(
HDC hdc,
SCRIPT_CACHE *psc,
SCRIPT_ANALYSIS *psa,
OPENTYPE_TAG tagScript,
OPENTYPE_TAG tagLangSys,
int *rcRangeChars,
TEXTRANGE_PROPERTIES **rpRangeProperties,
int cRanges,
const WCHAR *pwcChars,
int cChars,
int cMaxGlyphs,
WORD *pwLogClust,
SCRIPT_CHARPROP *pCharProps,
WORD *pwOutGlyphs,
SCRIPT_GLYPHPROP *pOutGlyphProps,
int *pcGlyphs
);
typedef HRESULT (WINAPI *SPOT) /*ScriptPlaceOpenType*/(
HDC hdc,
SCRIPT_CACHE *psc,
SCRIPT_ANALYSIS *psa,
OPENTYPE_TAG tagScript,
OPENTYPE_TAG tagLangSys,
int *rcRangeChars,
TEXTRANGE_PROPERTIES **rpRangeProperties,
int cRanges,
const WCHAR *pwcChars,
WORD *pwLogClust,
SCRIPT_CHARPROP *pCharProps,
int cChars,
const WORD *pwGlyphs,
const SCRIPT_GLYPHPROP *pGlyphProps,
int cGlyphs,
int *piAdvance,
GOFFSET *pGoffset,
ABC *pABC
);
/* Fallback implementations. */
static HRESULT WINAPI
hb_ScriptItemizeOpenType(
const WCHAR *pwcInChars,
int cInChars,
int cMaxItems,
const SCRIPT_CONTROL *psControl,
const SCRIPT_STATE *psState,
SCRIPT_ITEM *pItems,
OPENTYPE_TAG *pScriptTags,
int *pcItems
)
{
{
return ScriptItemize (pwcInChars,
cInChars,
cMaxItems,
psControl,
psState,
pItems,
pcItems);
}
}
static HRESULT WINAPI
hb_ScriptShapeOpenType(
HDC hdc,
SCRIPT_CACHE *psc,
SCRIPT_ANALYSIS *psa,
OPENTYPE_TAG tagScript,
OPENTYPE_TAG tagLangSys,
int *rcRangeChars,
TEXTRANGE_PROPERTIES **rpRangeProperties,
int cRanges,
const WCHAR *pwcChars,
int cChars,
int cMaxGlyphs,
WORD *pwLogClust,
SCRIPT_CHARPROP *pCharProps,
WORD *pwOutGlyphs,
SCRIPT_GLYPHPROP *pOutGlyphProps,
int *pcGlyphs
)
{
SCRIPT_VISATTR *psva = (SCRIPT_VISATTR *) pOutGlyphProps;
return ScriptShape (hdc,
psc,
pwcChars,
cChars,
cMaxGlyphs,
psa,
pwOutGlyphs,
pwLogClust,
psva,
pcGlyphs);
}
static HRESULT WINAPI
hb_ScriptPlaceOpenType(
HDC hdc,
SCRIPT_CACHE *psc,
SCRIPT_ANALYSIS *psa,
OPENTYPE_TAG tagScript,
OPENTYPE_TAG tagLangSys,
int *rcRangeChars,
TEXTRANGE_PROPERTIES **rpRangeProperties,
int cRanges,
const WCHAR *pwcChars,
WORD *pwLogClust,
SCRIPT_CHARPROP *pCharProps,
int cChars,
const WORD *pwGlyphs,
const SCRIPT_GLYPHPROP *pGlyphProps,
int cGlyphs,
int *piAdvance,
GOFFSET *pGoffset,
ABC *pABC
)
{
SCRIPT_VISATTR *psva = (SCRIPT_VISATTR *) pGlyphProps;
return ScriptPlace (hdc,
psc,
pwGlyphs,
cGlyphs,
psva,
psa,
piAdvance,
pGoffset,
pABC);
}
struct hb_uniscribe_shaper_funcs_t {
SIOT ScriptItemizeOpenType;
SSOT ScriptShapeOpenType;
SPOT ScriptPlaceOpenType;
inline void init (void)
{
HMODULE hinstLib;
this->ScriptItemizeOpenType = NULL;
this->ScriptShapeOpenType = NULL;
this->ScriptPlaceOpenType = NULL;
hinstLib = GetModuleHandle("usp10.dll");
if (hinstLib)
{
this->ScriptItemizeOpenType = (SIOT) GetProcAddress (hinstLib, "ScriptItemizeOpenType");
this->ScriptShapeOpenType = (SSOT) GetProcAddress (hinstLib, "ScriptShapeOpenType");
this->ScriptPlaceOpenType = (SPOT) GetProcAddress (hinstLib, "ScriptPlaceOpenType");
}
if (!this->ScriptItemizeOpenType ||
!this->ScriptShapeOpenType ||
!this->ScriptPlaceOpenType)
{
DEBUG_MSG (UNISCRIBE, NULL, "OpenType versions of functions not found; falling back.");
this->ScriptItemizeOpenType = hb_ScriptItemizeOpenType;
this->ScriptShapeOpenType = hb_ScriptShapeOpenType;
this->ScriptPlaceOpenType = hb_ScriptPlaceOpenType;
}
}
};
static hb_uniscribe_shaper_funcs_t *uniscribe_funcs;
static inline void
free_uniscribe_funcs (void)
{
free (uniscribe_funcs);
}
static hb_uniscribe_shaper_funcs_t *
hb_uniscribe_shaper_get_funcs (void)
{
retry:
hb_uniscribe_shaper_funcs_t *funcs = (hb_uniscribe_shaper_funcs_t *) hb_atomic_ptr_get (&uniscribe_funcs);
if (unlikely (!funcs))
{
funcs = (hb_uniscribe_shaper_funcs_t *) calloc (1, sizeof (hb_uniscribe_shaper_funcs_t));
if (unlikely (!funcs))
return NULL;
funcs->init ();
if (!hb_atomic_ptr_cmpexch (&uniscribe_funcs, NULL, funcs)) {
free (funcs);
goto retry;
}
#ifdef HAVE_ATEXIT
atexit (free_uniscribe_funcs); /* First person registers atexit() callback. */
#endif
}
return funcs;
}
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HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, face)
HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, font)
/*
* shaper face data
*/
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struct hb_uniscribe_shaper_face_data_t {
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HANDLE fh;
hb_uniscribe_shaper_funcs_t *funcs;
wchar_t face_name[LF_FACESIZE];
};
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/* Destroys blob. */
static hb_blob_t *
_hb_rename_font (hb_blob_t *blob, wchar_t *new_name)
{
unsigned int length, new_length = 0;
const char *orig_sfnt_data = hb_blob_get_data (blob, &length);
/* We'll create a private name for the font from a UUID using a simple,
* somewhat base64-like encoding scheme */
const char *enc = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-";
UUID id;
UuidCreate ((UUID*) &id);
unsigned int name_str_len = 0;
new_name[name_str_len++] = 'F';
new_name[name_str_len++] = '_';
unsigned char *p = (unsigned char *) &id;
for (unsigned int i = 0; i < 16; i += 2)
{
/* Spread the 16 bits from two bytes of the UUID across three chars of face_name,
* using the bits in groups of 5,5,6 to select chars from enc.
* This will generate 24 characters; with the 'F_' prefix we already provided,
* the name will be 26 chars (plus the NUL terminator), so will always fit within
* face_name (LF_FACESIZE = 32). */
new_name[name_str_len++] = enc[p[i] >> 3];
new_name[name_str_len++] = enc[((p[i] << 2) | (p[i + 1] >> 6)) & 0x1f];
new_name[name_str_len++] = enc[p[i + 1] & 0x3f];
}
new_name[name_str_len] = 0;
/* Create a copy of the font data, with the 'name' table replaced by a table
* that names the font with our private F_* name created above.
* For simplicity, we just append a new 'name' table and update the sfnt directory;
* the original table is left in place, but unused. */
/* The new table will contain just 5 name IDs: family, style, unique, full, PS.
* All of them point to the same name data with our unique F_* name. */
static const uint16_t name_IDs[] = { 1, 2, 3, 4, 6 };
const unsigned int name_header_size = 3 * 2; /* NameTableHeader: USHORT x 3 */
const unsigned int name_record_size = 6 * 2; /* NameRecord: USHORT x 6 */
const unsigned int name_count = sizeof (name_IDs) / sizeof (name_IDs[0]);
unsigned int name_table_length = name_header_size +
name_count * name_record_size +
name_str_len * 2; /* for name data in UTF16BE form */
unsigned int name_table_offset = (length + 3) & ~3;
new_length = name_table_offset + (name_table_length + 3) & ~3;
char *new_sfnt_data = (char *) calloc (1, new_length);
if (!new_sfnt_data)
return NULL;
memcpy(new_sfnt_data, orig_sfnt_data, length);
unsigned char *name_table_data = (unsigned char *) (new_sfnt_data + name_table_offset);
p = name_table_data;
*p++ = 0x00; *p++ = 0x00; /* format = 0 */
*p++ = 0x00; *p++ = name_count; /* number of name records */
*p++ = 0x00; *p++ = name_header_size + name_count * name_record_size; /* offset to string data */
for (unsigned int i = 0; i < name_count; i++) {
*p++ = 0x00; *p++ = 0x03; /* platformID */
*p++ = 0x00; *p++ = 0x01; /* encodingID */
*p++ = 0x04; *p++ = 0x09; /* languageID = 0x0409 */
*p++ = 0x00; *p++ = name_IDs[i]; /* nameID */
*p++ = 0x00; *p++ = name_str_len * 2; /* string length (bytes) */
*p++ = 0x00; *p++ = 0x00; /* string offset */
}
for (unsigned int i = 0; i < name_str_len; i++) {
/* copy string data from face_name, converting wchar_t to UTF16BE */
*p++ = new_name[i] >> 8;
*p++ = new_name[i] & 0xff;
}
/* calculate new name table checksum */
uint32_t checksum = 0;
while (name_table_data < p) {
checksum += (name_table_data[0] << 24) +
(name_table_data[1] << 16) +
(name_table_data[2] << 8) +
name_table_data[3];
name_table_data += 4;
}
/* adjust name table entry to point to new name table */
OT::OpenTypeFontFace *face = (OT::OpenTypeFontFace *) (new_sfnt_data);
unsigned int index;
if (face->find_table_index (HB_OT_TAG_name, &index))
{
const OT::TableRecord& record = face->get_table (index);
OT::TableRecord *rp = const_cast<OT::TableRecord *> (&record);
rp->checkSum.set(checksum);
rp->offset.set(name_table_offset);
rp->length.set(name_table_length);
}
/* The checkSumAdjustment field in the 'head' table is now wrong,
but AFAIK that doesn't actually cause any problems so I haven't
bothered to fix it. */
hb_blob_destroy (blob);
return hb_blob_create (new_sfnt_data, new_length, HB_MEMORY_MODE_WRITABLE, NULL, free);
}
hb_uniscribe_shaper_face_data_t *
_hb_uniscribe_shaper_face_data_create (hb_face_t *face)
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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))
return NULL;
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data->funcs = hb_uniscribe_shaper_get_funcs ();
if (unlikely (!data->funcs))
{
free (data);
return NULL;
}
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hb_blob_t *blob = hb_face_reference_blob (face);
if (unlikely (!hb_blob_get_length (blob)))
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DEBUG_MSG (UNISCRIBE, face, "Face has empty blob");
blob = _hb_rename_font (blob, data->face_name);
DWORD num_fonts_installed;
data->fh = AddFontMemResourceEx ((void *) hb_blob_get_data (blob, NULL),
hb_blob_get_length (blob),
0, &num_fonts_installed);
if (unlikely (!data->fh)) {
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DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed");
free (data);
return NULL;
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}
return data;
}
void
_hb_uniscribe_shaper_face_data_destroy (hb_uniscribe_shaper_face_data_t *data)
{
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RemoveFontMemResourceEx (data->fh);
free (data);
}
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/*
* shaper font data
*/
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;
SCRIPT_CACHE script_cache;
};
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static bool
populate_log_font (LOGFONTW *lf,
hb_font_t *font)
{
memset (lf, 0, sizeof (*lf));
lf->lfHeight = -font->y_scale;
lf->lfCharSet = DEFAULT_CHARSET;
hb_face_t *face = font->face;
hb_uniscribe_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
memcpy (lf->lfFaceName, face_data->face_name, sizeof (lf->lfFaceName));
return true;
}
hb_uniscribe_shaper_font_data_t *
_hb_uniscribe_shaper_font_data_create (hb_font_t *font)
{
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if (unlikely (!hb_uniscribe_shaper_face_data_ensure (font->face))) return NULL;
hb_uniscribe_shaper_font_data_t *data = (hb_uniscribe_shaper_font_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_font_data_t));
if (unlikely (!data))
return NULL;
data->hdc = GetDC (NULL);
if (unlikely (!populate_log_font (&data->log_font, font))) {
DEBUG_MSG (UNISCRIBE, font, "Font populate_log_font() failed");
_hb_uniscribe_shaper_font_data_destroy (data);
return NULL;
}
data->hfont = CreateFontIndirectW (&data->log_font);
if (unlikely (!data->hfont)) {
DEBUG_MSG (UNISCRIBE, font, "Font CreateFontIndirectW() failed");
_hb_uniscribe_shaper_font_data_destroy (data);
return NULL;
}
if (!SelectObject (data->hdc, data->hfont)) {
DEBUG_MSG (UNISCRIBE, font, "Font SelectObject() failed");
_hb_uniscribe_shaper_font_data_destroy (data);
return NULL;
}
return data;
}
void
_hb_uniscribe_shaper_font_data_destroy (hb_uniscribe_shaper_font_data_t *data)
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{
if (data->hdc)
ReleaseDC (NULL, data->hdc);
if (data->hfont)
DeleteObject (data->hfont);
if (data->script_cache)
ScriptFreeCache (&data->script_cache);
free (data);
}
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LOGFONTW *
hb_uniscribe_font_get_logfontw (hb_font_t *font)
{
if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL;
hb_uniscribe_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
return &font_data->log_font;
}
HFONT
hb_uniscribe_font_get_hfont (hb_font_t *font)
{
if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL;
hb_uniscribe_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
return font_data->hfont;
}
/*
* shaper shape_plan data
*/
struct hb_uniscribe_shaper_shape_plan_data_t {};
hb_uniscribe_shaper_shape_plan_data_t *
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_hb_uniscribe_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
const hb_feature_t *user_features HB_UNUSED,
unsigned int num_user_features HB_UNUSED)
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{
return (hb_uniscribe_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
}
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void
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_hb_uniscribe_shaper_shape_plan_data_destroy (hb_uniscribe_shaper_shape_plan_data_t *data HB_UNUSED)
{
}
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/*
* shaper
*/
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hb_bool_t
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_hb_uniscribe_shape (hb_shape_plan_t *shape_plan,
hb_font_t *font,
hb_buffer_t *buffer,
const hb_feature_t *features,
unsigned int num_features)
{
hb_face_t *face = font->face;
hb_uniscribe_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
hb_uniscribe_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
hb_uniscribe_shaper_funcs_t *funcs = face_data->funcs;
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#define FAIL(...) \
HB_STMT_START { \
DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
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return false; \
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} HB_STMT_END;
HRESULT hr;
retry:
unsigned int scratch_size;
char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
/* Allocate char buffers; they all fit */
#define ALLOCATE_ARRAY(Type, name, len) \
Type *name = (Type *) scratch; \
scratch += (len) * sizeof ((name)[0]); \
scratch_size -= (len) * sizeof ((name)[0]);
#define utf16_index() var1.u32
WCHAR *pchars = (WCHAR *) scratch;
unsigned int chars_len = 0;
for (unsigned int i = 0; i < buffer->len; i++) {
hb_codepoint_t c = buffer->info[i].codepoint;
buffer->info[i].utf16_index() = chars_len;
if (likely (c < 0x10000))
pchars[chars_len++] = c;
else if (unlikely (c >= 0x110000))
pchars[chars_len++] = 0xFFFD;
else {
pchars[chars_len++] = 0xD800 + ((c - 0x10000) >> 10);
pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1));
}
}
ALLOCATE_ARRAY (WCHAR, wchars, chars_len);
ALLOCATE_ARRAY (WORD, log_clusters, chars_len);
ALLOCATE_ARRAY (SCRIPT_CHARPROP, char_props, chars_len);
/* On Windows, we don't care about alignment...*/
unsigned int glyphs_size = scratch_size / (sizeof (WORD) +
sizeof (SCRIPT_GLYPHPROP) +
sizeof (int) +
sizeof (GOFFSET) +
sizeof (uint32_t));
ALLOCATE_ARRAY (WORD, glyphs, glyphs_size);
ALLOCATE_ARRAY (SCRIPT_GLYPHPROP, glyph_props, glyphs_size);
ALLOCATE_ARRAY (int, advances, glyphs_size);
ALLOCATE_ARRAY (GOFFSET, offsets, glyphs_size);
ALLOCATE_ARRAY (uint32_t, vis_clusters, glyphs_size);
/* Note:
* We can't touch the contents of glyph_props. Our fallback
* implementations of Shape and Place functions use that buffer
* by casting it to a different type. It works because they
* both agree about it, but if we want to access it here we
* need address that issue first.
*/
#undef ALLOCATE_ARRAY
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#define MAX_ITEMS 256
SCRIPT_ITEM items[MAX_ITEMS + 1];
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SCRIPT_CONTROL bidi_control = {0};
SCRIPT_STATE bidi_state = {0};
ULONG script_tags[MAX_ITEMS];
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;
bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
bidi_state.fOverrideDirection = 1;
hr = funcs->ScriptItemizeOpenType (wchars,
chars_len,
MAX_ITEMS,
&bidi_control,
&bidi_state,
items,
script_tags,
&item_count);
if (unlikely (FAILED (hr)))
FAIL ("ScriptItemizeOpenType() failed: 0x%08xL", hr);
#undef MAX_ITEMS
int *range_char_counts = NULL;
TEXTRANGE_PROPERTIES **range_properties = NULL;
int range_count = 0;
if (num_features) {
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/* TODO setup ranges */
}
OPENTYPE_TAG language_tag = hb_uint32_swap (hb_ot_tag_from_language (buffer->props.language));
unsigned int glyphs_offset = 0;
unsigned int glyphs_len;
bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
for (unsigned int j = 0; j < item_count; j++)
{
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unsigned int i = backward ? item_count - 1 - j : j;
unsigned int chars_offset = items[i].iCharPos;
unsigned int item_chars_len = items[i + 1].iCharPos - chars_offset;
retry_shape:
hr = funcs->ScriptShapeOpenType (font_data->hdc,
&font_data->script_cache,
&items[i].a,
script_tags[i],
language_tag,
range_char_counts,
range_properties,
range_count,
wchars + chars_offset,
item_chars_len,
glyphs_size - glyphs_offset,
/* out */
log_clusters + chars_offset,
char_props + chars_offset,
glyphs + glyphs_offset,
glyph_props + glyphs_offset,
(int *) &glyphs_len);
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if (unlikely (items[i].a.fNoGlyphIndex))
FAIL ("ScriptShapeOpenType() set fNoGlyphIndex");
if (unlikely (hr == E_OUTOFMEMORY))
{
buffer->ensure (buffer->allocated * 2);
if (buffer->in_error)
FAIL ("Buffer resize failed");
goto retry;
}
if (unlikely (hr == USP_E_SCRIPT_NOT_IN_FONT))
{
if (items[i].a.eScript == SCRIPT_UNDEFINED)
FAIL ("ScriptShapeOpenType() failed: Font doesn't support script");
items[i].a.eScript = SCRIPT_UNDEFINED;
goto retry_shape;
}
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if (unlikely (FAILED (hr)))
{
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FAIL ("ScriptShapeOpenType() failed: 0x%08xL", hr);
}
for (unsigned int j = chars_offset; j < chars_offset + item_chars_len; j++)
log_clusters[j] += glyphs_offset;
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hr = funcs->ScriptPlaceOpenType (font_data->hdc,
&font_data->script_cache,
&items[i].a,
script_tags[i],
language_tag,
range_char_counts,
range_properties,
range_count,
wchars + chars_offset,
log_clusters + chars_offset,
char_props + chars_offset,
item_chars_len,
glyphs + glyphs_offset,
glyph_props + glyphs_offset,
glyphs_len,
/* out */
advances + glyphs_offset,
offsets + glyphs_offset,
NULL);
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if (unlikely (FAILED (hr)))
FAIL ("ScriptPlaceOpenType() failed: 0x%08xL", hr);
glyphs_offset += glyphs_len;
}
glyphs_len = glyphs_offset;
/* Ok, we've got everything we need, now compose output buffer,
* very, *very*, carefully! */
/* Calculate visual-clusters. That's what we ship. */
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for (unsigned int i = 0; i < glyphs_len; i++)
vis_clusters[i] = -1;
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for (unsigned int i = 0; i < buffer->len; i++) {
uint32_t *p = &vis_clusters[log_clusters[buffer->info[i].utf16_index()]];
*p = MIN (*p, buffer->info[i].cluster);
}
if (!backward) {
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for (unsigned int i = 1; i < glyphs_len; i++)
if (vis_clusters[i] == -1)
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vis_clusters[i] = vis_clusters[i - 1];
} else {
for (int i = glyphs_len - 2; i >= 0; i--)
if (vis_clusters[i] == -1)
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vis_clusters[i] = vis_clusters[i + 1];
}
#undef utf16_index
buffer->ensure (glyphs_len);
if (buffer->in_error)
FAIL ("Buffer in error");
#undef FAIL
/* Set glyph infos */
buffer->len = 0;
for (unsigned int i = 0; i < glyphs_len; i++)
{
hb_glyph_info_t *info = &buffer->info[buffer->len++];
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! */
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return true;
}