Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/harfbuzz/HarfBuzzFace.cpp

Index: Source/core/platform/graphics/harfbuzz/HarfBuzzFace.cpp
diff --git a/Source/core/platform/graphics/harfbuzz/HarfBuzzFace.cpp b/Source/core/platform/graphics/harfbuzz/HarfBuzzFace.cpp
deleted file mode 100644
index a54b7d3b642691c35a4e65f5d21d9def4648b152..0000000000000000000000000000000000000000
--- a/Source/core/platform/graphics/harfbuzz/HarfBuzzFace.cpp
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * 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 "core/platform/graphics/harfbuzz/HarfBuzzFace.h"
-
-#include "core/platform/graphics/FontPlatformData.h"
-#include "hb-ot.h"
-#include "hb.h"
-
-namespace WebCore {
-
-const hb_tag_t HarfBuzzFace::vertTag = HB_TAG('v', 'e', 'r', 't');
-const hb_tag_t HarfBuzzFace::vrt2Tag = HB_TAG('v', 'r', 't', '2');
-
-// Though we have FontCache class, which provides the cache mechanism for
-// WebKit's font objects, we also need additional caching layer for HarfBuzz
-// to reduce the memory consumption because hb_face_t should be associated with
-// underling font data (e.g. CTFontRef, FTFace).
-
-class FaceCacheEntry : public RefCounted<FaceCacheEntry> {
-public:
-    static PassRefPtr<FaceCacheEntry> create(hb_face_t* face)
-    {
-        ASSERT(face);
-        return adoptRef(new FaceCacheEntry(face));
-    }
-    ~FaceCacheEntry()
-    {
-        hb_face_destroy(m_face);
-    }
-
-    hb_face_t* face() { return m_face; }
-    HashMap<uint32_t, uint16_t>* glyphCache() { return &m_glyphCache; }
-
-private:
-    explicit FaceCacheEntry(hb_face_t* face)
-        : m_face(face)
-    { }
-
-    hb_face_t* m_face;
-    HashMap<uint32_t, uint16_t> m_glyphCache;
-};
-
-typedef HashMap<uint64_t, RefPtr<FaceCacheEntry>, WTF::IntHash<uint64_t>, WTF::UnsignedWithZeroKeyHashTraits<uint64_t> > HarfBuzzFaceCache;
-
-static HarfBuzzFaceCache* harfBuzzFaceCache()
-{
-    DEFINE_STATIC_LOCAL(HarfBuzzFaceCache, s_harfBuzzFaceCache, ());
-    return &s_harfBuzzFaceCache;
-}
-
-HarfBuzzFace::HarfBuzzFace(FontPlatformData* platformData, uint64_t uniqueID)
-    : m_platformData(platformData)
-    , m_uniqueID(uniqueID)
-    , m_scriptForVerticalText(HB_SCRIPT_INVALID)
-{
-    HarfBuzzFaceCache::AddResult result = harfBuzzFaceCache()->add(m_uniqueID, 0);
-    if (result.isNewEntry)
-        result.iterator->value = FaceCacheEntry::create(createFace());
-    result.iterator->value->ref();
-    m_face = result.iterator->value->face();
-    m_glyphCacheForFaceCacheEntry = result.iterator->value->glyphCache();
-}
-
-HarfBuzzFace::~HarfBuzzFace()
-{
-    HarfBuzzFaceCache::iterator result = harfBuzzFaceCache()->find(m_uniqueID);
-    ASSERT_WITH_SECURITY_IMPLICATION(result != harfBuzzFaceCache()->end());
-    ASSERT(result.get()->value->refCount() > 1);
-    result.get()->value->deref();
-    if (result.get()->value->refCount() == 1)
-        harfBuzzFaceCache()->remove(m_uniqueID);
-}
-
-static hb_script_t findScriptForVerticalGlyphSubstitution(hb_face_t* face)
-{
-    static const unsigned maxCount = 32;
-
-    unsigned scriptCount = maxCount;
-    hb_tag_t scriptTags[maxCount];
-    hb_ot_layout_table_get_script_tags(face, HB_OT_TAG_GSUB, 0, &scriptCount, scriptTags);
-    for (unsigned scriptIndex = 0; scriptIndex < scriptCount; ++scriptIndex) {
-        unsigned languageCount = maxCount;
-        hb_tag_t languageTags[maxCount];
-        hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GSUB, scriptIndex, 0, &languageCount, languageTags);
-        for (unsigned languageIndex = 0; languageIndex < languageCount; ++languageIndex) {
-            unsigned featureIndex;
-            if (hb_ot_layout_language_find_feature(face, HB_OT_TAG_GSUB, scriptIndex, languageIndex, HarfBuzzFace::vertTag, &featureIndex)
-                || hb_ot_layout_language_find_feature(face, HB_OT_TAG_GSUB, scriptIndex, languageIndex, HarfBuzzFace::vrt2Tag, &featureIndex))
-                return hb_ot_tag_to_script(scriptTags[scriptIndex]);
-        }
-    }
-    return HB_SCRIPT_INVALID;
-}
-
-void HarfBuzzFace::setScriptForVerticalGlyphSubstitution(hb_buffer_t* buffer)
-{
-    if (m_scriptForVerticalText == HB_SCRIPT_INVALID)
-        m_scriptForVerticalText = findScriptForVerticalGlyphSubstitution(m_face);
-    hb_buffer_set_script(buffer, m_scriptForVerticalText);
-}
-
-} // namespace WebCore