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/*
* 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:
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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"
#if USE(ACCELERATED_COMPOSITING)
#include "CCFontAtlas.h"
#include "SkCanvas.h"
#include "cc/CCProxy.h"
namespace WebCore {
using namespace std;
CCFontAtlas::CCFontAtlas(SkBitmap bitmap, IntRect asciiToRectTable[128], int fontHeight)
: m_atlas(bitmap)
, m_fontHeight(fontHeight)
{
for (size_t i = 0; i < 128; ++i)
m_asciiToRectTable[i] = asciiToRectTable[i];
}
CCFontAtlas::~CCFontAtlas()
{
}
void CCFontAtlas::drawText(SkCanvas* canvas, const SkPaint& paint, const String& text, const IntPoint& destPosition, const IntSize& clip) const
{
ASSERT(CCProxy::isImplThread());
Vector<String> lines;
text.split('\n', lines);
IntPoint position = destPosition;
for (size_t i = 0; i < lines.size(); ++i) {
drawOneLineOfTextInternal(canvas, paint, lines[i], position);
position.setY(position.y() + m_fontHeight);
if (position.y() > clip.height())
return;
}
}
void CCFontAtlas::drawOneLineOfTextInternal(SkCanvas* canvas, const SkPaint& paint, const String& textLine, const IntPoint& destPosition) const
{
ASSERT(CCProxy::isImplThread());
IntPoint position = destPosition;
for (unsigned i = 0; i < textLine.length(); ++i) {
// If the ASCII code is out of bounds, then index 0 is used, which is just a plain rectangle glyph.
int asciiIndex = (textLine[i] < 128) ? textLine[i] : 0;
IntRect glyphBounds = m_asciiToRectTable[asciiIndex];
SkIRect source = SkIRect::MakeXYWH(glyphBounds.x(), glyphBounds.y(), glyphBounds.width(), glyphBounds.height());
canvas->drawBitmapRect(m_atlas, &source, SkRect::MakeXYWH(position.x(), position.y(), glyphBounds.width(), glyphBounds.height()), &paint);
position.setX(position.x() + glyphBounds.width());
}
}
void CCFontAtlas::drawDebugAtlas(SkCanvas* canvas, const IntPoint& destPosition) const
{
ASSERT(CCProxy::isImplThread());
SkIRect source = SkIRect::MakeWH(m_atlas.width(), m_atlas.height());
canvas->drawBitmapRect(m_atlas, &source, SkRect::MakeXYWH(destPosition.x(), destPosition.y(), m_atlas.width(), m_atlas.height()));
}
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
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