1 files changed, 146 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/android/fonts/GlyphMapAndroid.cpp b/Source/WebCore/platform/graphics/android/fonts/GlyphMapAndroid.cpp
new file mode 100644
index 0000000..a327b79
--- /dev/null
+++ b/Source/WebCore/platform/graphics/android/fonts/GlyphMapAndroid.cpp
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2009, The Android Open Source Project
+ * Copyright (C) 2006 Apple Computer, 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 "EmojiFont.h"
+#include "Font.h"
+#include "GlyphPageTreeNode.h"
+#include "HarfbuzzSkia.h"
+#include "SimpleFontData.h"
+#include "SkFontHost.h"
+#include "SkPaint.h"
+#include "SkTemplates.h"
+#include "SkUtils.h"
+#include "VerticalTextMap.h"
+
+
+using namespace android;
+
+namespace WebCore {
+
+#define NO_BREAK_SPACE_UNICHAR 0xA0
+
+static int substituteWithVerticalGlyphs(const FontPlatformData& platformData, uint16_t* glyphs, unsigned bufferLength)
+{
+    HB_FaceRec_* hbFace = platformData.harfbuzzFace();
+    if (!hbFace->gsub) {
+        // if there is no GSUB table, treat it as not covered
+        return 0Xffff;
+    }
+
+    HB_Buffer buffer;
+    hb_buffer_new(&buffer);
+    for (unsigned i = 0; i < bufferLength; ++i)
+        hb_buffer_add_glyph(buffer, glyphs[i], 0, i);
+
+    HB_UShort scriptIndex;
+    HB_UShort featureIndex;
+
+    HB_GSUB_Select_Script(hbFace->gsub, HB_MAKE_TAG('D', 'F', 'L', 'T'), &scriptIndex);
+    HB_GSUB_Select_Feature(hbFace->gsub, HB_MAKE_TAG('v', 'e', 'r', 't'), scriptIndex, 0xffff, &featureIndex);
+    HB_GSUB_Add_Feature(hbFace->gsub, featureIndex, 1);
+    HB_GSUB_Select_Feature(hbFace->gsub, HB_MAKE_TAG('v', 'r', 't', '2'), scriptIndex, 0xffff, &featureIndex);
+    HB_GSUB_Add_Feature(hbFace->gsub, featureIndex, 1);
+
+    int error = HB_GSUB_Apply_String(hbFace->gsub, buffer);
+    if (!error) {
+        for (unsigned i = 0; i < bufferLength; ++i)
+            glyphs[i] = static_cast<Glyph>(buffer->out_string[i].gindex);
+    }
+    return error;
+}
+
+bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
+{
+    if (SkUTF16_IsHighSurrogate(buffer[bufferLength-1])) {
+        SkDebugf("%s last char is high-surrogate", __FUNCTION__);
+        return false;
+    }
+    
+    SkPaint paint;
+    fontData->platformData().setupPaint(&paint);
+    paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
+
+    SkAutoSTMalloc <GlyphPage::size, uint16_t> glyphStorage(length);
+    uint16_t* glyphs = glyphStorage.get();
+    UChar *textBuffer = buffer;
+    UChar vTextBuffer[bufferLength];
+
+    if (fontData->platformData().orientation() == Vertical && !fontData->hasVerticalGlyphs()) {
+        // Convert to vertical form if there is no vertical glyphs.
+        for (unsigned i = 0; i < bufferLength; ++i) {
+            vTextBuffer[i] = VerticalTextMap::getVerticalForm(buffer[i]);
+            if (!vTextBuffer[i])
+                vTextBuffer[i] = buffer[i];
+        }
+        textBuffer = vTextBuffer;
+    }
+
+    unsigned count = paint.textToGlyphs(textBuffer, bufferLength << 1, glyphs);
+    if (count != length) {
+        SkDebugf("%s count != length\n", __FUNCTION__);
+        return false;
+    }
+
+    if (fontData->hasVerticalGlyphs()) {
+        bool lookVariants = false;
+        for (unsigned i = 0; i < bufferLength; ++i) {
+            if (!Font::isCJKIdeograph(textBuffer[i])) {
+                lookVariants = true;
+                continue;
+            }
+        }
+        if (lookVariants)
+            substituteWithVerticalGlyphs(fontData->platformData(), glyphs, bufferLength);
+    }
+
+    unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero
+
+    // search for emoji. If we knew for sure that buffer was a contiguous range
+    // of chars, we could quick-reject the range to avoid this loop (usually)
+    if (EmojiFont::IsAvailable()) {
+        const UChar* curr = textBuffer;
+        for (unsigned i = 0; i < length; i++) {
+            SkUnichar uni = SkUTF16_NextUnichar(&curr);
+            uint16_t glyphID = glyphs[i];
+            // only sniff if the normal font failed to recognize it
+            if (!glyphID)
+                glyphID = EmojiFont::UnicharToGlyph(uni);
+            setGlyphDataForIndex(offset + i, glyphID, fontData);
+            allGlyphs |= glyphID;
+        }
+    } else {
+        for (unsigned i = 0; i < length; i++) {
+            uint16_t glyphID = glyphs[i];
+            setGlyphDataForIndex(offset + i, glyphID, fontData);
+            allGlyphs |= glyphID;
+        }
+    }
+    return allGlyphs != 0;
+}
+
+}