/*
 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
 * Copyright (C) 2004-2025 Apple 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.
 *
 * 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 "BitmapImage.h"

#include "BitmapImageSource.h"
#include "GeometryUtilities.h"
#include "GraphicsContext.h"
#include "ImageBuffer.h"
#include "ImageObserver.h"
#include "NativeImageSource.h"

namespace WebCore {

Ref<BitmapImage> BitmapImage::create(ImageObserver* observer, AlphaOption alphaOption, GammaAndColorProfileOption gammaAndColorProfileOption)
{
    return adoptRef(*new BitmapImage(observer, alphaOption, gammaAndColorProfileOption));
}

Ref<BitmapImage> BitmapImage::create(Ref<NativeImage>&& nativeImage)
{
    return adoptRef(*new BitmapImage(WTFMove(nativeImage)));
}

RefPtr<BitmapImage> BitmapImage::create(RefPtr<NativeImage>&& nativeImage)
{
    if (!nativeImage)
        return nullptr;
    return adoptRef(*new BitmapImage(nativeImage.releaseNonNull()));
}

RefPtr<BitmapImage> BitmapImage::create(PlatformImagePtr&& platformImage)
{
    return create(NativeImage::create(WTFMove(platformImage)));
}

BitmapImage::BitmapImage(ImageObserver* observer, AlphaOption alphaOption, GammaAndColorProfileOption gammaAndColorProfileOption)
    : Image(observer)
    , m_source(BitmapImageSource::create(*this, alphaOption, gammaAndColorProfileOption))
{
}

BitmapImage::BitmapImage(Ref<NativeImage>&& image)
    : m_source(NativeImageSource::create(WTFMove(image)))
{
}

EncodedDataStatus BitmapImage::dataChanged(bool allDataReceived)
{
    return m_source->dataChanged(data(), allDataReceived);
}

void BitmapImage::destroyDecodedData(bool destroyAll)
{
    m_source->destroyDecodedData(destroyAll);
    invalidateAdapter();
}

ImageDrawResult BitmapImage::draw(GraphicsContext& context, const FloatRect& destinationRect, const FloatRect& sourceRect, ImagePaintingOptions options)
{
    if (destinationRect.isEmpty() || sourceRect.isEmpty())
        return ImageDrawResult::DidNothing;

    auto size = m_source->size(ImageOrientation::Orientation::None);
    auto sourceSize = m_source->sourceSize(ImageOrientation::Orientation::None);

    // adjustedSourceRect is in the coordinates of densityCorrectedSize, so map it to the sourceSize.
    auto adjustedSourceRect = sourceRect;
    if (sourceSize != size)
        adjustedSourceRect.scale(sourceSize / size);

    auto scaleFactorForDrawing = context.scaleFactorForDrawing(destinationRect, adjustedSourceRect);
    auto sizeForDrawing = expandedIntSize(sourceSize * scaleFactorForDrawing);
    auto subsamplingLevel =  m_source->subsamplingLevelForScaleFactor(context, scaleFactorForDrawing, options.allowImageSubsampling());
    auto shouldDecodeToHDR = m_source->hasHDRGainMap() && options.drawsHDRContent() == DrawsHDRContent::Yes && options.dynamicRangeLimit() != PlatformDynamicRangeLimit::standard() ? ShouldDecodeToHDR::Yes : ShouldDecodeToHDR::No;

    auto nativeImage = m_source->currentNativeImageForDrawing(subsamplingLevel, { options.decodingMode(), shouldDecodeToHDR, sizeForDrawing });

    if (!nativeImage) {
        // The decoder has not returned a frame. Fill the image rectangle with a debugging color to show what has happened.
        if (options.showDebugBackground() == ShowDebugBackground::Yes) {
            if (nativeImage.error() == DecodingStatus::Decoding)
                fillWithSolidColor(context, destinationRect, Color::yellow.colorWithAlphaByte(128), options.compositeOperator());
            else if (nativeImage.error() == DecodingStatus::Invalid)
                fillWithSolidColor(context, destinationRect, Color::red.colorWithAlphaByte(128), options.compositeOperator());
        }
        return nativeImage.error() == DecodingStatus::Decoding ? ImageDrawResult::DidRequestDecoding : ImageDrawResult::DidNothing;
    }

    if (auto color = (*nativeImage)->singlePixelSolidColor())
        fillWithSolidColor(context, destinationRect, *color, options.compositeOperator());
    else {
        // adjustedSourceRect is in the coordinates of the unsubsampled image, so map it to the subsampled image.
        auto imageSize = (*nativeImage)->size();
        if (imageSize != sourceSize)
            adjustedSourceRect.scale(imageSize / sourceSize);

        auto orientation = options.orientation();
        if (orientation == ImageOrientation::Orientation::FromImage)
            orientation = currentFrameOrientation();

        auto headroom = options.headroom();
        if (hasHDRContentForTesting() && options.dynamicRangeLimit() != PlatformDynamicRangeLimit::standard())
            fillWithSolidColor(context, destinationRect, Color::gold, options.compositeOperator());
        else {
            if (headroom == Headroom::FromImage)
                headroom = currentFrameHeadroom(shouldDecodeToHDR);

            context.drawNativeImage(*nativeImage, destinationRect, adjustedSourceRect, { options, orientation, headroom });
        }
    }

    if (auto observer = imageObserver())
        observer->didDraw(*this);

    return ImageDrawResult::DidDraw;
}

void BitmapImage::drawPattern(GraphicsContext& context, const FloatRect& destinationRect, const FloatRect& tileRect, const AffineTransform& transform, const FloatPoint& phase, const FloatSize& spacing, ImagePaintingOptions options)
{
    if (tileRect.isEmpty())
        return;

    auto headroom = options.headroom();
    if (headroom == Headroom::FromImage && hasHDRContentForTesting())
        fillWithSolidColor(context, destinationRect, Color::gold, options.compositeOperator());
    else if (context.drawLuminanceMask())
        drawLuminanceMaskPattern(context, destinationRect, tileRect, transform, phase, spacing, options);
    else
        Image::drawPattern(context, destinationRect, tileRect, transform, phase, spacing, { options, ImageOrientation::Orientation::FromImage });
}

void BitmapImage::drawLuminanceMaskPattern(GraphicsContext& context, const FloatRect& destinationRect, const FloatRect& tileRect, const AffineTransform& transform, const FloatPoint& phase, const FloatSize& spacing, ImagePaintingOptions options)
{
    ASSERT(!tileRect.isEmpty());
    ASSERT(context.drawLuminanceMask());

    auto buffer = context.createImageBuffer(expandedIntSize(tileRect.size()));
    if (!buffer)
        return;

    auto observer = imageObserver();

    // Temporarily reset image observer, we don't want to receive any changeInRect() calls due to this relayout.
    setImageObserver(nullptr);

    auto bufferRect = FloatRect { { }, buffer->logicalSize() };
    draw(buffer->context(), bufferRect, tileRect, { options, DecodingMode::Synchronous, ImageOrientation::Orientation::FromImage });

    setImageObserver(WTFMove(observer));
    buffer->convertToLuminanceMask();

    context.setDrawLuminanceMask(false);
    context.drawPattern(*buffer, destinationRect, bufferRect, transform, phase, spacing, { options, ImageOrientation::Orientation::FromImage });
}

void BitmapImage::dump(TextStream& ts) const
{
    Image::dump(ts);
    m_source->dump(ts);
}

} // namespace WebCore
