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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:
*
* 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 "EmojiFont.h"
#include "Font.h"
#include "FontCache.h"
#include "SimpleFontData.h"
#include "FloatRect.h"
#include "FontDescription.h"
#include "SkPaint.h"
#include "SkTypeface.h"
#include "SkTime.h"
using namespace android;
namespace WebCore {
void SimpleFontData::platformInit()
{
SkPaint paint;
SkPaint::FontMetrics metrics;
m_font.setupPaint(&paint);
(void)paint.getFontMetrics(&metrics);
// use ceil instead of round to favor descent, given a lot of accidental
// clipping of descenders (e.g. 14pt 'g') in textedit fields
int d = SkScalarCeil(metrics.fDescent);
int s = SkScalarRound(metrics.fDescent - metrics.fAscent);
int a = s - d;
m_ascent = a;
m_descent = d;
m_xHeight = SkScalarToFloat(-metrics.fAscent) * 0.56f; // hack I stole from the window's port
m_lineSpacing = a + d;
m_lineGap = SkScalarRound(metrics.fLeading);
}
void SimpleFontData::platformDestroy()
{
delete m_smallCapsFontData;
}
SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const
{
if (!m_smallCapsFontData) {
m_smallCapsFontData = new SimpleFontData(FontPlatformData(m_font, fontDescription.computedSize() * 0.7f));
}
return m_smallCapsFontData;
}
#define kMaxBufferCount 64
bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
{
SkPaint paint;
uint16_t glyphs[kMaxBufferCount];
m_font.setupPaint(&paint);
paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
while (length > 0) {
int n = SkMin32(length, SK_ARRAY_COUNT(glyphs));
int count = paint.textToGlyphs(characters, n << 1, glyphs);
for (int i = 0; i < count; i++) {
if (0 == glyphs[i]) {
return false; // missing glyph
}
}
characters += n;
length -= n;
}
return true;
}
void SimpleFontData::determinePitch()
{
m_treatAsFixedPitch = false;
}
float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
{
SkASSERT(sizeof(glyph) == 2); // compile-time assert
SkPaint paint;
m_font.setupPaint(&paint);
if (EmojiFont::IsEmojiGlyph(glyph))
return EmojiFont::GetAdvanceWidth(glyph, paint);
else {
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
return SkScalarToFloat(paint.measureText(&glyph, 2));
}
}
}
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