Source/WebCore/html/canvas/CanvasPattern.cpp

/*
 * Copyright (C) 2006, 2008, 2017 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 *
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#include "config.h"
#include "CanvasPattern.h"

#include "DOMMatrix2DInit.h"
#include "DOMMatrixReadOnly.h"
#include "NativeImage.h"
#include "Pattern.h"
#include <wtf/text/WTFString.h>

namespace WebCore {

Ref<CanvasPattern> CanvasPattern::create(SourceImage&& image, bool repeatX, bool repeatY, bool originClean)
{
    return adoptRef(*new CanvasPattern(WTFMove(image), repeatX, repeatY, originClean));
}

CanvasPattern::CanvasPattern(SourceImage&& image, bool repeatX, bool repeatY, bool originClean)
    : m_pattern(Pattern::create(WTFMove(image), { repeatX, repeatY }))
    , m_originClean(originClean)
{
}

CanvasPattern::~CanvasPattern() = default;

bool CanvasPattern::parseRepetitionType(const String& type, bool& repeatX, bool& repeatY)
{
    if (type.isEmpty() || type == "repeat"_s) {
        repeatX = true;
        repeatY = true;
        return true;
    }
    if (type == "no-repeat"_s) {
        repeatX = false;
        repeatY = false;
        return true;
    }
    if (type == "repeat-x"_s) {
        repeatX = true;
        repeatY = false;
        return true;
    }
    if (type == "repeat-y"_s) {
        repeatX = false;
        repeatY = true;
        return true;
    }
    return false;
}

ExceptionOr<void> CanvasPattern::setTransform(DOMMatrix2DInit&& matrixInit)
{
    auto checkValid = DOMMatrixReadOnly::validateAndFixup(matrixInit);
    if (checkValid.hasException())
        return checkValid.releaseException();

    m_pattern->setPatternSpaceTransform({ matrixInit.a.value_or(1), matrixInit.b.value_or(0), matrixInit.c.value_or(0), matrixInit.d.value_or(1), matrixInit.e.value_or(0), matrixInit.f.value_or(0) });
    return { };
}

} // namespace WebCore