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/*
* Copyright (C) 2006, 2007, 2008 Apple Computer, 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 COMPUTER, 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 COMPUTER, 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 "Gradient.h"
#include "CSSParser.h"
#include "GraphicsContext.h"
#include <ApplicationServices/ApplicationServices.h>
namespace WebCore {
void Gradient::platformDestroy()
{
CGShadingRelease(m_gradient);
m_gradient = 0;
}
static void gradientCallback(void* info, const CGFloat* in, CGFloat* out)
{
float r, g, b, a;
static_cast<const Gradient*>(info)->getColor(*in, &r, &g, &b, &a);
out[0] = r;
out[1] = g;
out[2] = b;
out[3] = a;
}
CGShadingRef Gradient::platformGradient()
{
if (m_gradient)
return m_gradient;
const CGFloat intervalRanges[2] = { 0, 1 };
const CGFloat colorComponentRanges[4 * 2] = { 0, 1, 0, 1, 0, 1, 0, 1 };
const CGFunctionCallbacks gradientCallbacks = { 0, gradientCallback, 0 };
CGFunctionRef colorFunction = CGFunctionCreate(this, 1, intervalRanges, 4, colorComponentRanges, &gradientCallbacks);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
if (m_radial)
m_gradient = CGShadingCreateRadial(colorSpace, m_p0, m_r0, m_p1, m_r1, colorFunction, true, true);
else
m_gradient = CGShadingCreateAxial(colorSpace, m_p0, m_p1, colorFunction, true, true);
CGColorSpaceRelease(colorSpace);
CGFunctionRelease(colorFunction);
return m_gradient;
}
void Gradient::fill(GraphicsContext* context, const FloatRect& rect)
{
context->clip(rect);
CGContextDrawShading(context->platformContext(), platformGradient());
}
} //namespace
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