Source/WebCore/platform/graphics/win/NativeImageDirect2D.cpp

/*
 * Copyright (C) 2016 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 "NativeImage.h"

#include "Color.h"
#include "Direct2DOperations.h"
#include "FloatRect.h"
#include "GeometryUtilities.h"
#include "GraphicsContext.h"
#include "IntSize.h"
#include "NotImplemented.h"
#include "PlatformContextDirect2D.h"
#include <d2d1.h>
#include <wincodec.h>

namespace WebCore {

static IWICImagingFactory* imagingFactory()
{
    static IWICImagingFactory* imagingFactory = nullptr;
    if (!imagingFactory) {
        HRESULT hr = CoCreateInstance(CLSID_WICImagingFactory, nullptr, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&imagingFactory));
        RELEASE_ASSERT(SUCCEEDED(hr));
    }

    return imagingFactory;
}

IntSize nativeImageSize(const NativeImagePtr& image)
{
    UINT width = 0;
    UINT height = 0;
    if (!image)
        return { };

    return image->GetPixelSize();
}

bool nativeImageHasAlpha(const NativeImagePtr& image)
{
    if (!image)
        return false;

    D2D1_PIXEL_FORMAT pixelFormat = image->GetPixelFormat();
    return pixelFormat.alphaMode != D2D1_ALPHA_MODE_IGNORE;
}

Color nativeImageSinglePixelSolidColor(const NativeImagePtr& image)
{
    if (!image || nativeImageSize(image) != IntSize(1, 1))
        return Color();

    notImplemented();

    return Color();
}

void drawNativeImage(const NativeImagePtr& image, GraphicsContext& context, const FloatRect& destRect, const FloatRect& srcRect, const IntSize& srcSize, const ImagePaintingOptions& options)
{
    auto* platformContext = context.platformContext();

    // Subsampling may have given us an image that is smaller than size().
    IntSize subsampledImageSize = nativeImageSize(image);

    // srcRect is in the coordinates of the unsubsampled image, so we have to map it to the subsampled image.
    FloatRect adjustedSrcRect = srcRect;
    if (subsampledImageSize != srcSize)
        adjustedSrcRect = mapRect(srcRect, FloatRect({ }, srcSize), FloatRect({ }, subsampledImageSize));

    auto& state = context.state();
    Direct2D::drawNativeImage(*platformContext, image.get(), subsampledImageSize, destRect, adjustedSrcRect, options, state.alpha, Direct2D::ShadowState(state));
}

void clearNativeImageSubimages(const NativeImagePtr& image)
{
    notImplemented();

#if CACHE_SUBIMAGES
    if (image)
        subimageCache().clearImage(image.get());
#endif
}


}