--- /dev/null
+/*
+ * Copyright © 2011 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 0x0500
+
+#include "hb-private.hh"
+
+#include "hb-uniscribe.h"
+
+#include "hb-ot-tag.h"
+
+#include "hb-font-private.hh"
+
+#include "hb-buffer-private.hh"
+
+#include <windows.h>
+#include <usp10.h>
+
+HB_BEGIN_DECLS
+
+
+#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
+);
+*/
+
+static void
+fallback_shape (hb_font_t *font,
+ hb_buffer_t *buffer)
+{
+ DEBUG_MSG (UNISCRIBE, NULL, "Fallback shaper invoked");
+}
+
+static void
+populate_log_font (LOGFONTW *lf,
+ HDC hdc,
+ hb_font_t *font,
+ hb_blob_t *blob)
+{
+ memset (lf, 0, sizeof (*lf));
+ int dpi = GetDeviceCaps (hdc, LOGPIXELSY);
+ lf->lfHeight = MulDiv (font->x_scale, dpi, 72);
+
+ WCHAR family_name[] = {'n','a','z','l','i'};
+ for (unsigned int i = 0; family_name[i] && i < LF_FACESIZE - 1; i++)
+ lf->lfFaceName[i] = family_name[i];
+}
+
+void
+hb_uniscribe_shape (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features)
+{
+ HRESULT hr;
+
+ if (unlikely (!buffer->len)) {
+ fallback:
+ fallback_shape (font, buffer);
+ }
+
+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);
+
+
+#define FALLBACK(...) \
+ HB_STMT_START { \
+ DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
+ goto fallback; \
+ } HB_STMT_END;
+
+
+#define MAX_ITEMS 10
+
+ SCRIPT_ITEM items[MAX_ITEMS + 1];
+ SCRIPT_STATE bidi_state = {0};
+ ULONG script_tags[MAX_ITEMS];
+ int item_count;
+
+ bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
+ bidi_state.fOverrideDirection = 1;
+
+ hr = ScriptItemizeOpenType (wchars,
+ chars_len,
+ MAX_ITEMS,
+ NULL,
+ &bidi_state,
+ items,
+ script_tags,
+ &item_count);
+ if (unlikely (FAILED (hr)))
+ FALLBACK ("ScriptItemizeOpenType() failed: %d", hr);
+
+#undef MAX_ITEMS
+
+ int *range_char_counts = NULL;
+ TEXTRANGE_PROPERTIES **range_properties = NULL;
+ int range_count = 0;
+ if (num_features) {
+ /* XXX setup ranges */
+ }
+
+ hb_blob_t *blob = hb_face_get_blob (font->face);
+ unsigned int blob_length;
+ const char *blob_data = hb_blob_get_data (blob, &blob_length);
+ if (unlikely (!blob_length)) {
+ hb_blob_destroy (blob);
+ FALLBACK ("Empty font blob");
+ }
+
+ DWORD num_fonts_installed;
+ HANDLE fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed);
+ if (unlikely (!fh)) {
+ hb_blob_destroy (blob);
+ FALLBACK ("AddFontMemResourceEx() failed");
+ }
+
+ /* FREE stuff, specially when taking fallback... */
+
+ HDC hdc = GetDC (NULL); /* XXX The DC should be cached on the face I guess? */
+
+ LOGFONTW log_font;
+ populate_log_font (&log_font, hdc, font, blob);
+
+ HFONT hfont = CreateFontIndirectW (&log_font);
+ SelectObject (hdc, hfont);
+
+ SCRIPT_CACHE script_cache = NULL;
+ OPENTYPE_TAG language_tag = hb_ot_tag_from_language (buffer->props.language);
+
+ unsigned int glyphs_offset = 0;
+ unsigned int glyphs_len;
+ for (unsigned int i = 0; i < item_count; i++)
+ {
+ unsigned int chars_offset = items[i].iCharPos;
+ unsigned int item_chars_len = items[i + 1].iCharPos - chars_offset;
+ OPENTYPE_TAG script_tag = script_tags[i]; /* XXX buffer->props.script */
+
+ hr = ScriptShapeOpenType (hdc,
+ &script_cache,
+ &items[i].a,
+ script_tag,
+ 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))
+ FALLBACK ("ScriptShapeOpenType() set fNoGlyphIndex");
+ if (unlikely (hr == E_OUTOFMEMORY))
+ {
+ buffer->ensure (buffer->allocated * 2);
+ if (buffer->in_error)
+ FALLBACK ("Buffer resize failed");
+ goto retry;
+ }
+ if (unlikely (FAILED (hr)))
+ FALLBACK ("ScriptShapeOpenType() failed: %d", hr);
+
+ hr = ScriptPlaceOpenType (hdc,
+ &script_cache,
+ &items[i].a,
+ script_tag,
+ 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)))
+ FALLBACK ("ScriptPlaceOpenType() failed: %d", hr);
+
+ glyphs_offset += glyphs_len;
+ }
+ glyphs_len = glyphs_offset;
+
+ ReleaseDC (NULL, hdc);
+ DeleteObject (hfont);
+ RemoveFontMemResourceEx (fh);
+
+ /* 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 < buffer->len; i++)
+ vis_clusters[log_clusters[buffer->info[i].utf16_index()]] = buffer->info[i].cluster;
+ for (unsigned int i = 1; i < glyphs_len; i++)
+ if (!glyph_props[i].sva.fClusterStart)
+ vis_clusters[i] = vis_clusters[i - 1];
+
+#undef utf16_index
+
+ buffer->ensure (glyphs_len);
+ if (buffer->in_error)
+ FALLBACK ("Buffer in error");
+
+#undef FALLBACK
+
+ /* Set glyph infos */
+ for (unsigned int i = 0; i < glyphs_len; i++)
+ {
+ hb_glyph_info_t *info = &buffer->info[i];
+
+ 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;
+}
+
+
+HB_END_DECLS
projects / platform / upstream / libHarfBuzzSharp.git / commitdiff