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/*
* 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 "GlyphPageTreeNode.h"
#include "SkTemplates.h"
#include "SkPaint.h"
#include "SkUtils.h"
#include "SimpleFontData.h"
using namespace android;
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
// 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 = buffer;
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;
}
}
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