/*
 * Copyright (C) 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:
 *
 * 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. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE 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 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"
#include "Pattern.h"

#include "AffineTransform.h"
#include "Image.h"
#include "NativeImageSkia.h"

#include "SkShader.h"

namespace WebCore {

static inline SkShader::TileMode shaderRule(bool shouldRepeat)
{
    // FIXME: Skia does not have a "draw the tile only once" option
    // Clamp draws the last line of the image after stopping repeating
    return shouldRepeat ? SkShader::kRepeat_TileMode : SkShader::kClamp_TileMode;
}

PlatformPatternPtr Pattern::createPlatformPattern(const AffineTransform& patternTransform) const
{
    SkBitmap* bm = m_tileImage->nativeImageForCurrentFrame();
    SkShader* shader = SkShader::CreateBitmapShader(*bm,
                                                    shaderRule(m_repeatX),
                                                    shaderRule(m_repeatY));
    shader->setLocalMatrix(patternTransform);
    return shader;
}

} // namespace WebCore