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/*
* Copyright (c) 2007, 2008, 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:
*
* * 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.
* * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 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 "Font.h"
#include "FloatRect.h"
#include "GlyphBuffer.h"
#include "GraphicsContext.h"
#include "NotImplemented.h"
#include "PlatformContextSkia.h"
#include "SimpleFontData.h"
#include "SkCanvas.h"
#include "SkPaint.h"
#include "SkTemplates.h"
#include "SkTypeface.h"
#include "SkUtils.h"
namespace WebCore {
bool Font::canReturnFallbackFontsForComplexText()
{
return false;
}
void Font::drawGlyphs(GraphicsContext* gc, const SimpleFontData* font,
const GlyphBuffer& glyphBuffer, int from, int numGlyphs,
const FloatPoint& point) const {
SkASSERT(sizeof(GlyphBufferGlyph) == sizeof(uint16_t)); // compile-time assert
const GlyphBufferGlyph* glyphs = glyphBuffer.glyphs(from);
SkScalar x = SkFloatToScalar(point.x());
SkScalar y = SkFloatToScalar(point.y());
// FIXME: text rendering speed:
// Android has code in their WebCore fork to special case when the
// GlyphBuffer has no advances other than the defaults. In that case the
// text drawing can proceed faster. However, it's unclear when those
// patches may be upstreamed to WebKit so we always use the slower path
// here.
const GlyphBufferAdvance* adv = glyphBuffer.advances(from);
SkAutoSTMalloc<32, SkPoint> storage(numGlyphs);
SkPoint* pos = storage.get();
for (int i = 0; i < numGlyphs; i++) {
pos[i].set(x, y);
x += SkFloatToScalar(adv[i].width());
y += SkFloatToScalar(adv[i].height());
}
SkCanvas* canvas = gc->platformContext()->canvas();
int textMode = gc->platformContext()->getTextDrawingMode();
// We draw text up to two times (once for fill, once for stroke).
if (textMode & cTextFill) {
SkPaint paint;
gc->platformContext()->setupPaintForFilling(&paint);
font->platformData().setupPaint(&paint);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
paint.setColor(gc->fillColor().rgb());
canvas->drawPosText(glyphs, numGlyphs << 1, pos, paint);
}
if ((textMode & cTextStroke)
&& gc->platformContext()->getStrokeStyle() != NoStroke
&& gc->platformContext()->getStrokeThickness() > 0) {
SkPaint paint;
gc->platformContext()->setupPaintForStroking(&paint, 0, 0);
font->platformData().setupPaint(&paint);
paint.setFlags(SkPaint::kAntiAlias_Flag);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
paint.setColor(gc->strokeColor().rgb());
if (textMode & cTextFill) {
// If we also filled, we don't want to draw shadows twice.
// See comment in FontChromiumWin.cpp::paintSkiaText() for more details.
paint.setLooper(0)->safeUnref();
}
canvas->drawPosText(glyphs, numGlyphs << 1, pos, paint);
}
}
void Font::drawComplexText(GraphicsContext* context, const TextRun& run,
const FloatPoint& point, int from, int to) const
{
notImplemented();
}
float Font::floatWidthForComplexText(const TextRun& run, HashSet<const SimpleFontData*>* /* fallbackFonts */) const
{
notImplemented();
return 0;
}
int Font::offsetForPositionForComplexText(const TextRun& run, int x,
bool includePartialGlyphs) const
{
notImplemented();
return 0;
}
FloatRect Font::selectionRectForComplexText(const TextRun& run,
const IntPoint& point, int h,
int from, int to) const
{
notImplemented();
return FloatRect();
}
} // namespace WebCore
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