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// Copyright (c) 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "platform/graphics/GraphicsContextState.h"
#include "platform/graphics/skia/SkiaUtils.h"
namespace blink {
static inline SkFilterQuality filterQualityForPaint(InterpolationQuality quality)
{
// The filter quality "selected" here will primarily be used when painting a
// primitive using one of the SkPaints below. For the most part this will
// not affect things that are part of the Image class hierarchy (which use
// the unmodified m_interpolationQuality.)
return quality != InterpolationNone ? kLow_SkFilterQuality : kNone_SkFilterQuality;
}
GraphicsContextState::GraphicsContextState()
: m_strokeColor(Color::black)
, m_fillColor(Color::black)
, m_textDrawingMode(TextModeFill)
, m_interpolationQuality(InterpolationDefault)
, m_saveCount(0)
, m_shouldAntialias(true)
{
m_strokePaint.setStyle(SkPaint::kStroke_Style);
m_strokePaint.setStrokeWidth(SkFloatToScalar(m_strokeData.thickness()));
m_strokePaint.setColor(m_strokeColor.rgb());
m_strokePaint.setStrokeCap(SkPaint::kDefault_Cap);
m_strokePaint.setStrokeJoin(SkPaint::kDefault_Join);
m_strokePaint.setStrokeMiter(SkFloatToScalar(m_strokeData.miterLimit()));
m_strokePaint.setFilterQuality(filterQualityForPaint(m_interpolationQuality));
m_strokePaint.setAntiAlias(m_shouldAntialias);
m_fillPaint.setColor(m_fillColor.rgb());
m_fillPaint.setFilterQuality(filterQualityForPaint(m_interpolationQuality));
m_fillPaint.setAntiAlias(m_shouldAntialias);
}
GraphicsContextState::GraphicsContextState(const GraphicsContextState& other)
: m_strokePaint(other.m_strokePaint)
, m_fillPaint(other.m_fillPaint)
, m_strokeData(other.m_strokeData)
, m_strokeColor(other.m_strokeColor)
, m_strokeGradient(other.m_strokeGradient)
, m_fillColor(other.m_fillColor)
, m_fillGradient(other.m_fillGradient)
, m_looper(other.m_looper)
, m_textDrawingMode(other.m_textDrawingMode)
, m_colorFilter(other.m_colorFilter)
, m_interpolationQuality(other.m_interpolationQuality)
, m_saveCount(0)
, m_shouldAntialias(other.m_shouldAntialias) { }
void GraphicsContextState::copy(const GraphicsContextState& source)
{
this->~GraphicsContextState();
new (this) GraphicsContextState(source);
}
const SkPaint& GraphicsContextState::strokePaint(int strokedPathLength) const
{
if (m_strokeGradient && m_strokeGradient->shaderChanged())
m_strokeGradient->applyToPaint(m_strokePaint);
m_strokeData.setupPaintDashPathEffect(&m_strokePaint, strokedPathLength);
return m_strokePaint;
}
const SkPaint& GraphicsContextState::fillPaint() const
{
if (m_fillGradient && m_fillGradient->shaderChanged())
m_fillGradient->applyToPaint(m_fillPaint);
return m_fillPaint;
}
void GraphicsContextState::setStrokeStyle(StrokeStyle style)
{
m_strokeData.setStyle(style);
}
void GraphicsContextState::setStrokeThickness(float thickness)
{
m_strokeData.setThickness(thickness);
m_strokePaint.setStrokeWidth(SkFloatToScalar(thickness));
}
void GraphicsContextState::setStrokeColor(const Color& color)
{
m_strokeGradient.clear();
m_strokeColor = color;
m_strokePaint.setColor(color.rgb());
m_strokePaint.setShader(0);
}
void GraphicsContextState::setStrokeGradient(const PassRefPtr<Gradient> gradient, float alpha)
{
m_strokeColor = Color::black;
m_strokeGradient = gradient;
m_strokePaint.setColor(scaleAlpha(SK_ColorBLACK, alpha));
m_strokeGradient->applyToPaint(m_strokePaint);
}
void GraphicsContextState::setLineCap(LineCap cap)
{
m_strokeData.setLineCap(cap);
m_strokePaint.setStrokeCap((SkPaint::Cap)cap);
}
void GraphicsContextState::setLineJoin(LineJoin join)
{
m_strokeData.setLineJoin(join);
m_strokePaint.setStrokeJoin((SkPaint::Join)join);
}
void GraphicsContextState::setMiterLimit(float miterLimit)
{
m_strokeData.setMiterLimit(miterLimit);
m_strokePaint.setStrokeMiter(SkFloatToScalar(miterLimit));
}
void GraphicsContextState::setFillColor(const Color& color)
{
m_fillColor = color;
m_fillGradient.clear();
m_fillPaint.setColor(color.rgb());
m_fillPaint.setShader(0);
}
void GraphicsContextState::setFillGradient(const PassRefPtr<Gradient> gradient, float alpha)
{
m_fillColor = Color::black;
m_fillGradient = gradient;
m_fillPaint.setColor(scaleAlpha(SK_ColorBLACK, alpha));
m_fillGradient->applyToPaint(m_fillPaint);
}
// Shadow. (This will need tweaking if we use draw loopers for other things.)
void GraphicsContextState::setDrawLooper(PassRefPtr<SkDrawLooper> drawLooper)
{
m_looper = drawLooper;
m_strokePaint.setLooper(m_looper.get());
m_fillPaint.setLooper(m_looper.get());
}
void GraphicsContextState::clearDrawLooper()
{
m_looper.clear();
m_strokePaint.setLooper(0);
m_fillPaint.setLooper(0);
}
void GraphicsContextState::setLineDash(const DashArray& dashes, float dashOffset)
{
m_strokeData.setLineDash(dashes, dashOffset);
}
void GraphicsContextState::setColorFilter(PassRefPtr<SkColorFilter> colorFilter)
{
m_colorFilter = colorFilter;
m_strokePaint.setColorFilter(m_colorFilter.get());
m_fillPaint.setColorFilter(m_colorFilter.get());
}
void GraphicsContextState::setInterpolationQuality(InterpolationQuality quality)
{
m_interpolationQuality = quality;
m_strokePaint.setFilterQuality(filterQualityForPaint(quality));
m_fillPaint.setFilterQuality(filterQualityForPaint(quality));
}
void GraphicsContextState::setShouldAntialias(bool shouldAntialias)
{
m_shouldAntialias = shouldAntialias;
m_strokePaint.setAntiAlias(shouldAntialias);
m_fillPaint.setAntiAlias(shouldAntialias);
}
} // namespace blink
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