Add draft experimental Uniscribe backend
Not complete yet, font selection doesn't work. But hey it shapes! This is not supposed to be a production backend, more like a testing backend.
This commit is contained in:
Behdad Esfahbod
parent
0d7d4824b2
commit
0fbb2dc831
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@ -137,6 +137,15 @@ AM_CONDITIONAL(HAVE_FREETYPE, $have_freetype)
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dnl ===========================================================================
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AC_CHECK_HEADERS(usp10.h windows.h, have_uniscribe=true, have_uniscribe=false)
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if $have_uniscribe; then
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UNISCRIBE_CFLAGS=
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UNISCRIBE_LIBS="-lusp10 -lgdi32"
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AC_SUBST(UNISCRIBE_CFLAGS)
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AC_SUBST(UNISCRIBE_LIBS)
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fi
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AM_CONDITIONAL(HAVE_UNISCRIBE, $have_uniscribe)
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AC_CONFIG_FILES([
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Makefile
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harfbuzz.pc
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@ -108,6 +108,17 @@ HBHEADERS += \
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$(NULL)
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endif
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if HAVE_UNISCRIBE
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HBCFLAGS += $(UNISCRIBE_CFLAGS)
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HBLIBS += $(UNISCRIBE_LIBS)
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HBSOURCES += \
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hb-uniscribe-shape.cc \
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$(NULL)
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HBHEADERS += \
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hb-uniscribe.h \
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$(NULL)
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endif
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CXXLINK = $(LINK)
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libharfbuzz_la_SOURCES = $(HBSOURCES) $(HBHEADERS)
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libharfbuzz_la_CPPFLAGS = $(HBCFLAGS)
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@ -507,7 +507,9 @@ _hb_debug_msg (const char *what,
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va_start (ap, message);
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(void) (_hb_debug (level, max_level) &&
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fprintf (stderr, "%s(%p): ", what, obj) &&
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fprintf (stderr, "%s", what) &&
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(obj && fprintf (stderr, "(%p)", obj), TRUE) &&
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fprintf (stderr, ": ") &&
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(func && fprintf (stderr, "%s: ", func), TRUE) &&
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(indented && fprintf (stderr, "%-*d-> ", level + 1, level), TRUE) &&
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vfprintf (stderr, message, ap) &&
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@ -0,0 +1,325 @@
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/*
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* Copyright © 2011 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 0x0500
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#include "hb-private.hh"
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#include "hb-uniscribe.h"
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#include "hb-ot-tag.h"
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#include "hb-font-private.hh"
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#include "hb-buffer-private.hh"
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#include <windows.h>
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#include <usp10.h>
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HB_BEGIN_DECLS
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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 void
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fallback_shape (hb_font_t *font,
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hb_buffer_t *buffer)
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{
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DEBUG_MSG (UNISCRIBE, NULL, "Fallback shaper invoked");
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}
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static void
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populate_log_font (LOGFONTW *lf,
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HDC hdc,
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hb_font_t *font,
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hb_blob_t *blob)
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{
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memset (lf, 0, sizeof (*lf));
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int dpi = GetDeviceCaps (hdc, LOGPIXELSY);
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lf->lfHeight = MulDiv (font->x_scale, dpi, 72);
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WCHAR family_name[] = {'n','a','z','l','i'};
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for (unsigned int i = 0; family_name[i] && i < LF_FACESIZE - 1; i++)
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lf->lfFaceName[i] = family_name[i];
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}
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void
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hb_uniscribe_shape (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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HRESULT hr;
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if (unlikely (!buffer->len)) {
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fallback:
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fallback_shape (font, buffer);
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}
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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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#define FALLBACK(...) \
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HB_STMT_START { \
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DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
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goto fallback; \
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} HB_STMT_END;
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#define MAX_ITEMS 10
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SCRIPT_ITEM items[MAX_ITEMS + 1];
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SCRIPT_STATE bidi_state = {0};
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ULONG script_tags[MAX_ITEMS];
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int item_count;
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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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NULL,
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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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FALLBACK ("ScriptItemizeOpenType() failed: %d", 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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/* XXX setup ranges */
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}
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hb_blob_t *blob = hb_face_get_blob (font->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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hb_blob_destroy (blob);
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FALLBACK ("Empty font blob");
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}
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DWORD num_fonts_installed;
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HANDLE fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed);
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if (unlikely (!fh)) {
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hb_blob_destroy (blob);
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FALLBACK ("AddFontMemResourceEx() failed");
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}
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/* FREE stuff, specially when taking fallback... */
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HDC hdc = GetDC (NULL); /* XXX The DC should be cached on the face I guess? */
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LOGFONTW log_font;
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populate_log_font (&log_font, hdc, font, blob);
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HFONT hfont = CreateFontIndirectW (&log_font);
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SelectObject (hdc, hfont);
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SCRIPT_CACHE script_cache = NULL;
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OPENTYPE_TAG language_tag = 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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for (unsigned int i = 0; i < item_count; i++)
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{
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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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OPENTYPE_TAG script_tag = script_tags[i]; /* XXX buffer->props.script */
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hr = ScriptShapeOpenType (hdc,
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&script_cache,
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&items[i].a,
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script_tag,
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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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FALLBACK ("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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FALLBACK ("Buffer resize failed");
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goto retry;
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}
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if (unlikely (FAILED (hr)))
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FALLBACK ("ScriptShapeOpenType() failed: %d", hr);
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hr = ScriptPlaceOpenType (hdc,
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&script_cache,
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&items[i].a,
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script_tag,
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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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FALLBACK ("ScriptPlaceOpenType() failed: %d", 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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ReleaseDC (NULL, hdc);
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DeleteObject (hfont);
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RemoveFontMemResourceEx (fh);
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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 < buffer->len; i++)
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vis_clusters[log_clusters[buffer->info[i].utf16_index()]] = buffer->info[i].cluster;
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for (unsigned int i = 1; i < glyphs_len; i++)
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if (!glyph_props[i].sva.fClusterStart)
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vis_clusters[i] = vis_clusters[i - 1];
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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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FALLBACK ("Buffer in error");
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#undef FALLBACK
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/* Set glyph infos */
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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[i];
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info->codepoint = glyphs[i];
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info->cluster = vis_clusters[i];
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/* The rest is crap. Let's store position info there for now. */
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info->mask = advances[i];
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info->var1.u32 = offsets[i].du;
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info->var2.u32 = offsets[i].dv;
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}
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/* Set glyph positions */
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buffer->clear_positions ();
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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[i];
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hb_glyph_position_t *pos = &buffer->pos[i];
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/* TODO vertical */
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pos->x_advance = info->mask;
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pos->x_offset = info->var1.u32;
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pos->y_offset = info->var2.u32;
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}
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/* Wow, done! */
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return;
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}
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HB_END_DECLS
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@ -0,0 +1,46 @@
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/*
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* Copyright © 2011 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
|
||||
* 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
|
||||
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
|
||||
* 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,
|
||||
* 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
|
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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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#ifndef HB_USP_SHAPE_H
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#define HB_USP_SHAPE_H
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#include "hb-common.h"
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#include "hb-shape.h"
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HB_BEGIN_DECLS
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void
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hb_uniscribe_shape (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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HB_END_DECLS
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#endif /* HB_USP_SHAPE_H */
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