Source/WebCore/platform/graphics/cairo/PatternCairo.cpp

/*
 * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
 *
 * 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 "Pattern.h"

#if USE(CAIRO)

#include "CairoUtilities.h"
#include "GraphicsContext.h"

namespace WebCore {

cairo_pattern_t* Pattern::createPlatformPattern(const AffineTransform&) const
{
    auto nativeImage = tileNativeImage();
    if (!nativeImage)
        return nullptr;

    auto platformImage = nativeImage->platformImage();
    if (!platformImage)
        return nullptr;

    cairo_pattern_t* pattern = cairo_pattern_create_for_surface(platformImage.get());

    // cairo merges patter space and user space itself
    cairo_matrix_t matrix = toCairoMatrix(patternSpaceTransform());
    cairo_matrix_invert(&matrix);
    cairo_pattern_set_matrix(pattern, &matrix);

    if (repeatX() || repeatY())
        cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
    return pattern;
}

} // namespace WebCore

#endif // USE(CAIRO)