diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/hb-uniscribe.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/hb-uniscribe.cc | 476 |
1 files changed, 476 insertions, 0 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/hb-uniscribe.cc b/Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/hb-uniscribe.cc new file mode 100644 index 00000000000..18b88b2234f --- /dev/null +++ b/Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/hb-uniscribe.cc @@ -0,0 +1,476 @@ +/* + * 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 +#define WIN32_LEAN_AND_MEAN + +#define HB_SHAPER uniscribe +#include "hb-shaper-impl-private.hh" + +#include <windows.h> +#include <usp10.h> + +#include "hb-uniscribe.h" + +#include "hb-ot-name-table.hh" +#include "hb-ot-tag.h" + + +#ifndef HB_DEBUG_UNISCRIBE +#define HB_DEBUG_UNISCRIBE (HB_DEBUG+0) +#endif + + +/* +DWORD GetFontData( + __in HDC hdc, + __in DWORD dwTable, + __in DWORD dwOffset, + __out LPVOID lpvBuffer, + __in DWORD cbData +); +*/ + + +HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, face) +HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, font) + + +/* + * shaper face data + */ + +struct hb_uniscribe_shaper_face_data_t { + HANDLE fh; +}; + +hb_uniscribe_shaper_face_data_t * +_hb_uniscribe_shaper_face_data_create (hb_face_t *face) +{ + hb_uniscribe_shaper_face_data_t *data = (hb_uniscribe_shaper_face_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_face_data_t)); + if (unlikely (!data)) + return NULL; + + hb_blob_t *blob = hb_face_reference_blob (face); + unsigned int blob_length; + const char *blob_data = hb_blob_get_data (blob, &blob_length); + if (unlikely (!blob_length)) + DEBUG_MSG (UNISCRIBE, face, "Face has empty blob"); + + DWORD num_fonts_installed; + data->fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed); + hb_blob_destroy (blob); + if (unlikely (!data->fh)) { + DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed"); + free (data); + return NULL; + } + + return data; +} + +void +_hb_uniscribe_shaper_face_data_destroy (hb_uniscribe_shaper_face_data_t *data) +{ + RemoveFontMemResourceEx (data->fh); + free (data); +} + + +/* + * shaper font data + */ + +struct hb_uniscribe_shaper_font_data_t { + HDC hdc; + LOGFONTW log_font; + HFONT hfont; + SCRIPT_CACHE script_cache; +}; + +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_blob_t *blob = OT::Sanitizer<OT::name>::sanitize (hb_face_reference_table (font->face, HB_TAG ('n','a','m','e'))); + const OT::name *name_table = OT::Sanitizer<OT::name>::lock_instance (blob); + unsigned int len = name_table->get_name (3, 1, 0x409, 4, + lf->lfFaceName, + sizeof (lf->lfFaceName[0]) * LF_FACESIZE) + / sizeof (lf->lfFaceName[0]); + hb_blob_destroy (blob); + + if (unlikely (!len)) { + DEBUG_MSG (UNISCRIBE, NULL, "Didn't find English name table entry"); + return false; + } + if (unlikely (len >= LF_FACESIZE)) { + DEBUG_MSG (UNISCRIBE, NULL, "Font name too long"); + return false; + } + + for (unsigned int i = 0; i < len; i++) + lf->lfFaceName[i] = hb_be_uint16 (lf->lfFaceName[i]); + lf->lfFaceName[len] = 0; + + return true; +} + +hb_uniscribe_shaper_font_data_t * +_hb_uniscribe_shaper_font_data_create (hb_font_t *font) +{ + 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) +{ + if (data->hdc) + ReleaseDC (NULL, data->hdc); + if (data->hfont) + DeleteObject (data->hfont); + if (data->script_cache) + ScriptFreeCache (&data->script_cache); + free (data); +} + + +/* + * shaper shape_plan data + */ + +struct hb_uniscribe_shaper_shape_plan_data_t {}; + +hb_uniscribe_shaper_shape_plan_data_t * +_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) +{ + return (hb_uniscribe_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED; +} + +void +_hb_uniscribe_shaper_shape_plan_data_destroy (hb_uniscribe_shaper_shape_plan_data_t *data HB_UNUSED) +{ +} + + +/* + * shaper + */ + +LOGFONTW * +hb_uniscribe_font_get_logfontw (hb_font_t *font) +{ + if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL; + 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; +} + + +hb_bool_t +_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); + +#define FAIL(...) \ + HB_STMT_START { \ + DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \ + return false; \ + } 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); + +#undef ALLOCATE_ARRAY + +#define MAX_ITEMS 256 + + SCRIPT_ITEM items[MAX_ITEMS + 1]; + SCRIPT_CONTROL bidi_control = {0}; + SCRIPT_STATE bidi_state = {0}; + ULONG script_tags[MAX_ITEMS]; + int item_count; + + /* MinGW32 doesn't define fMergeNeutralItems, so we bruteforce */ + //bidi_control.fMergeNeutralItems = true; + *(uint32_t*)&bidi_control |= 1<<24; + + bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1; + bidi_state.fOverrideDirection = 1; + + hr = 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) { + /* 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++) + { + 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 = 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); + + 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; + } + if (unlikely (FAILED (hr))) + { + FAIL ("ScriptShapeOpenType() failed: 0x%08xL", hr); + } + + for (unsigned int j = chars_offset; j < chars_offset + item_chars_len; j++) + log_clusters[j] += glyphs_offset; + + hr = 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); + 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. */ + for (unsigned int i = 0; i < glyphs_len; i++) + vis_clusters[i] = -1; + 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) { + for (unsigned int i = 1; i < glyphs_len; i++) + if (vis_clusters[i] == -1) + vis_clusters[i] = vis_clusters[i - 1]; + } else { + for (int i = glyphs_len - 2; i >= 0; i--) + if (vis_clusters[i] == -1) + 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! */ + return true; +} + + |