Revert of Switch to HarfBuzz on Mac and remove CoreText shaper

Source/platform/fonts/harfbuzz/HarfBuzzFaceCoreText.cpp

+/*
+ * Copyright (c) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "platform/fonts/harfbuzz/HarfBuzzFace.h"
+
+#include "platform/fonts/FontPlatformData.h"
+#include "platform/fonts/SimpleFontData.h"
+#include "platform/fonts/harfbuzz/HarfBuzzShaper.h"
+
+#include <ApplicationServices/ApplicationServices.h>
+#include "hb.h"
+
+namespace blink {
+
+static hb_position_t floatToHarfBuzzPosition(CGFloat value)
+{
+    return static_cast<hb_position_t>(value * (1 << 16));
+}
+
+static hb_bool_t getGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData)
+{
+    CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
+    UniChar characters[4];
+    CGGlyph cgGlyphs[4];
+    size_t length = 0;
+    U16_APPEND_UNSAFE(characters, length, unicode);
+    if (!CTFontGetGlyphsForCharacters(ctFont, characters, cgGlyphs, length))
+        return false;
+    *glyph = cgGlyphs[0];
+    return true;
+}
+
+static hb_position_t getGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData)
+{
+    CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
+    CGGlyph cgGlyph = glyph;
+    CGFloat advance = CTFontGetAdvancesForGlyphs(ctFont, kCTFontHorizontalOrientation, &cgGlyph, 0, 1);
+    return floatToHarfBuzzPosition(advance);
+}
+
+static hb_bool_t getGlyphHorizontalOrigin(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_position_t* x, hb_position_t* y, void* userData)
+{
+    return true;
+}
+
+static hb_bool_t getGlyphExtents(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_glyph_extents_t* extents, void* userData)
+{
+    CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
+    CGRect cgRect;
+    CGGlyph cgGlyph = glyph;
+    if (CTFontGetBoundingRectsForGlyphs(ctFont, kCTFontDefaultOrientation, &cgGlyph, &cgRect, 1) == CGRectNull)
+        return false;
+    extents->x_bearing = floatToHarfBuzzPosition(cgRect.origin.x);
+    extents->y_bearing = -floatToHarfBuzzPosition(cgRect.origin.y);
+    extents->width = floatToHarfBuzzPosition(cgRect.size.width);
+    extents->height = floatToHarfBuzzPosition(cgRect.size.height);
+    return true;
+}
+
+static hb_font_funcs_t* harfBuzzCoreTextGetFontFuncs()
+{
+    static hb_font_funcs_t* harfBuzzCoreTextFontFuncs = 0;
+
+    if (!harfBuzzCoreTextFontFuncs) {
+        harfBuzzCoreTextFontFuncs = hb_font_funcs_create();
+        hb_font_funcs_set_glyph_func(harfBuzzCoreTextFontFuncs, getGlyph, 0, 0);
+        hb_font_funcs_set_glyph_h_advance_func(harfBuzzCoreTextFontFuncs, getGlyphHorizontalAdvance, 0, 0);
+        hb_font_funcs_set_glyph_h_origin_func(harfBuzzCoreTextFontFuncs, getGlyphHorizontalOrigin, 0, 0);
+        hb_font_funcs_set_glyph_extents_func(harfBuzzCoreTextFontFuncs, getGlyphExtents, 0, 0);
+        hb_font_funcs_make_immutable(harfBuzzCoreTextFontFuncs);
+    }
+    return harfBuzzCoreTextFontFuncs;
+}
+
+static void releaseTableData(void* userData)
+{
+    CFDataRef cfData = reinterpret_cast<CFDataRef>(userData);
+    CFRelease(cfData);
+}
+
+static hb_blob_t* harfBuzzCoreTextGetTable(hb_face_t* face, hb_tag_t tag, void* userData)
+{
+    CGFontRef cgFont = reinterpret_cast<CGFontRef>(userData);
+    if (!cgFont)
+        return 0;
+    CFDataRef cfData = CGFontCopyTableForTag(cgFont, tag);
+    if (!cfData)
+        return 0;
+
+    const char* data = reinterpret_cast<const char*>(CFDataGetBytePtr(cfData));
+    const size_t length = CFDataGetLength(cfData);
+    if (!data || !length)
+        return 0;
+    return hb_blob_create(data, length, HB_MEMORY_MODE_READONLY, reinterpret_cast<void*>(const_cast<__CFData*>(cfData)), releaseTableData);
+}
+
+hb_face_t* HarfBuzzFace::createFace()
+{
+    // It seems that CTFontCopyTable of MacOSX10.5 sdk doesn't work for
+    // OpenType layout tables(GDEF, GSUB, GPOS). Use CGFontCopyTableForTag instead.
+    hb_face_t* face = hb_face_create_for_tables(harfBuzzCoreTextGetTable, m_platformData->cgFont(), 0);
+    ASSERT(face);
+    return face;
+}
+
+hb_font_t* HarfBuzzFace::createFont()
+{
+    hb_font_t* font = hb_font_create(m_face);
+    hb_font_set_funcs(font, harfBuzzCoreTextGetFontFuncs(), m_platformData, 0);
+    const float size = m_platformData->m_textSize;
+    hb_font_set_ppem(font, size, size);
+    const int scale = (1 << 16) * static_cast<int>(size);
+    hb_font_set_scale(font, scale, scale);
+    hb_font_make_immutable(font);
+    return font;
+}
+
+} // namespace blink