/*
 * 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:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer. 
 * 2.  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. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 "GlyphPageTreeNode.h"
#include "SimpleFontData.h"

#include "SkTemplates.h"
#include "SkPaint.h"
#include "SkUtils.h"

namespace WebCore {

#define NO_BREAK_SPACE_UNICHAR  0xA0

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();
    unsigned count = paint.textToGlyphs(buffer, bufferLength << 1, glyphs);
    if (count != length) {
        SkDebugf("%s count != length\n", __FUNCTION__);
        return false;
    }

    unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero
    for (unsigned i = 0; i < length; i++) {
        setGlyphDataForIndex(offset + i, glyphs[i], fontData);
        allGlyphs |= glyphs[i];
    }
    return allGlyphs != 0;
}

}