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/*
* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2007 Alp Toker <alp@atoker.com>
*
* 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. ``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
* 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 "CanvasGradient.h"
#include "CanvasRenderingContext.h"
#include "CanvasStyle.h"
#include "Gradient.h"
namespace WebCore {
CanvasGradient::CanvasGradient(const FloatPoint& p0, const FloatPoint& p1, CanvasRenderingContext& context)
: m_gradient(Gradient::create(Gradient::LinearData { p0, p1 }, { ColorInterpolationMethod::SRGB { }, AlphaPremultiplication::Unpremultiplied }))
, m_context(context)
{
}
CanvasGradient::CanvasGradient(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, CanvasRenderingContext& context)
: m_gradient(Gradient::create(Gradient::RadialData { p0, p1, r0, r1, 1 }, { ColorInterpolationMethod::SRGB { }, AlphaPremultiplication::Unpremultiplied }))
, m_context(context)
{
}
CanvasGradient::CanvasGradient(const FloatPoint& centerPoint, float angleInRadians, CanvasRenderingContext& context)
: m_gradient(Gradient::create(Gradient::ConicData { centerPoint, angleInRadians }, { ColorInterpolationMethod::SRGB { }, AlphaPremultiplication::Unpremultiplied }))
, m_context(context)
{
}
Ref<CanvasGradient> CanvasGradient::create(const FloatPoint& p0, const FloatPoint& p1, CanvasRenderingContext& context)
{
return adoptRef(*new CanvasGradient(p0, p1, context));
}
Ref<CanvasGradient> CanvasGradient::create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, CanvasRenderingContext& context)
{
return adoptRef(*new CanvasGradient(p0, r0, p1, r1, context));
}
Ref<CanvasGradient> CanvasGradient::create(const FloatPoint& centerPoint, float angleInRadians, CanvasRenderingContext& context)
{
return adoptRef(*new CanvasGradient(centerPoint, angleInRadians, context));
}
CanvasGradient::~CanvasGradient() = default;
ExceptionOr<void> CanvasGradient::addColorStop(double value, const String& colorString)
{
if (!(value >= 0 && value <= 1))
return Exception { IndexSizeError };
// Treat currentColor as black, as required by the standard.
Color color;
if (isCurrentColorString(colorString))
color = Color::black;
else if (m_context)
color = parseColor(colorString, m_context->canvasBase());
else
color = parseColor(colorString);
if (!color.isValid())
return Exception { SyntaxError };
m_gradient->addColorStop({ static_cast<float>(value), WTFMove(color) });
return { };
}
}
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