/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

// bootstrap stuff
#include <test/bootstrapfixture.hxx>

#include <com/sun/star/util/Endianness.hpp>
#include <com/sun/star/rendering/ColorComponentTag.hpp>
#include <com/sun/star/rendering/ColorSpaceType.hpp>
#include <com/sun/star/rendering/RenderingIntent.hpp>
#include <com/sun/star/rendering/XIntegerReadOnlyBitmap.hpp>
#include <com/sun/star/rendering/XIntegerBitmapColorSpace.hpp>
#include <com/sun/star/rendering/XBitmapPalette.hpp>

#include <cppuhelper/implbase.hxx>
#include <rtl/ref.hxx>
#include <sal/log.hxx>

#include <vcl/canvastools.hxx>
#include <vcl/bitmap.hxx>

#include <canvasbitmap.hxx>
#include <vcl/BitmapWriteAccess.hxx>

#include <algorithm>

using namespace ::com::sun::star;
using namespace vcl::unotools;

namespace com::sun::star::rendering
{

static bool operator==( const RGBColor& rLHS, const ARGBColor& rRHS )
{
    return rLHS.Red == rRHS.Red && rLHS.Green == rRHS.Green && rLHS.Blue == rRHS.Blue;
}

}

namespace
{

class CanvasBitmapTest : public test::BootstrapFixture
{
public:
    CanvasBitmapTest() : BootstrapFixture(true, false) {}

    void runTest();

    CPPUNIT_TEST_SUITE(CanvasBitmapTest);
    CPPUNIT_TEST(runTest);
    CPPUNIT_TEST_SUITE_END();
};

bool rangeCheck( const rendering::RGBColor& rColor )
{
    return rColor.Red < 0.0 || rColor.Red > 1.0 ||
        rColor.Green < 0.0 || rColor.Green > 1.0 ||
        rColor.Blue < 0.0 || rColor.Blue > 1.0;
}

void checkCanvasBitmap( const rtl::Reference<VclCanvasBitmap>& xBmp,
                        const char*                            msg,
                        int                                    nOriginalDepth )
{
    SAL_INFO("vcl", "Testing " << msg << ", with depth " << nOriginalDepth);

    Bitmap   aContainedBmp( xBmp->getBitmap() );
    int      nDepth;
    bool     bHasPalette;
    {
        BitmapScopedReadAccess pAcc( aContainedBmp );
        nDepth = pAcc->GetBitCount();
        bHasPalette = pAcc->HasPalette();
    }

    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Original bitmap size not (200,200)",
                            Size(200,200), aContainedBmp.GetSizePixel());

    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Original bitmap size via API not (200,200)",
                            sal_Int32(200), xBmp->getSize().Width);
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Original bitmap size via API not (200,200)",
                            sal_Int32(200), xBmp->getSize().Height);

    CPPUNIT_ASSERT_EQUAL_MESSAGE( "alpha state mismatch",
                            aContainedBmp.HasAlpha(), bool(xBmp->hasAlpha()));

    CPPUNIT_ASSERT_MESSAGE( "getScaledBitmap() failed",
                            xBmp->getScaledBitmap( geometry::RealSize2D(500,500), false ).is());

    rendering::IntegerBitmapLayout aLayout;
    uno::Sequence<sal_Int8> aPixelData = xBmp->getData(aLayout, geometry::IntegerRectangle2D(0,0,1,1));

    const sal_Int32 nExpectedBitsPerPixel(bHasPalette ? 8 : (aContainedBmp.HasAlpha() ? 32 : 24));
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "# scanlines not 1",
                            static_cast<sal_Int32>(1), aLayout.ScanLines);
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "# scanline bytes mismatch",
                            static_cast<sal_Int32>((nExpectedBitsPerPixel+7)/8), aLayout.ScanLineBytes);
    CPPUNIT_ASSERT_MESSAGE( "# scanline stride mismatch",
                            aLayout.ScanLineStride == (nExpectedBitsPerPixel+7)/8 ||
                            aLayout.ScanLineStride == -(nExpectedBitsPerPixel+7)/8);
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "# plane stride not 0",
                            static_cast<sal_Int32>(0), aLayout.PlaneStride);

    CPPUNIT_ASSERT_MESSAGE( "Color space not there",
                            aLayout.ColorSpace.is());

    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Palette existence does not conform to bitmap",
                            (nDepth <= 8), aLayout.Palette.is());

    uno::Sequence<sal_Int8> aPixelData2 = xBmp->getPixel( aLayout, geometry::IntegerPoint2D(0,0) );

    CPPUNIT_ASSERT_EQUAL_MESSAGE( "getData and getPixel did not return same amount of data",
                            aPixelData.getLength(), aPixelData2.getLength());

    aPixelData = xBmp->getData(aLayout, geometry::IntegerRectangle2D(0,0,/*X2*/200,/*Y2*/1));
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "# scanlines not 1 for getPixel",
                            static_cast<sal_Int32>(1), aLayout.ScanLines);
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "# scanline bytes mismatch for getPixel",
                            static_cast<sal_Int32>((200*nExpectedBitsPerPixel+7)/8), aLayout.ScanLineBytes);
    CPPUNIT_ASSERT_MESSAGE( "# scanline stride mismatch for getPixel",
                            aLayout.ScanLineStride == (200*nExpectedBitsPerPixel+7)/8 ||
                            aLayout.ScanLineStride == -(200*nExpectedBitsPerPixel+7)/8);

    uno::Sequence< rendering::RGBColor >  aRGBColors  = xBmp->convertIntegerToRGB( aPixelData );
    uno::Sequence< rendering::ARGBColor > aARGBColors = xBmp->convertIntegerToARGB( aPixelData );

    const rendering::RGBColor*  pRGBStart ( aRGBColors.getConstArray() );
    const rendering::RGBColor*  pRGBEnd   ( aRGBColors.getConstArray()+aRGBColors.getLength() );
    const rendering::ARGBColor* pARGBStart( aARGBColors.getConstArray() );
    std::pair<const rendering::RGBColor*,
        const rendering::ARGBColor*> aRes = std::mismatch( pRGBStart, pRGBEnd, pARGBStart );
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "argb and rgb colors are not equal",
                            pRGBEnd, aRes.first);

    CPPUNIT_ASSERT_MESSAGE( "rgb colors are not within [0,1] range",
                            std::none_of(pRGBStart,pRGBEnd,&rangeCheck));

    if( !aContainedBmp.HasAlpha() )
    {
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
            "First pixel is not white", 1.0, pRGBStart[0].Red, 1E-12);
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
            "First pixel is not white", 1.0, pRGBStart[0].Green, 1E-12);
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
            "First pixel is not white", 1.0, pRGBStart[0].Blue, 1E-12);
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
            "Second pixel is not opaque", 1.0, pARGBStart[1].Alpha, 1E-12);
    }
    else
    {
        // with premultiplied alpha, the white becomes black
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
            "First pixel is not black", 0.0, pRGBStart[0].Red, 1E-12);
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
            "First pixel is not black", 0.0, pRGBStart[0].Green, 1E-12);
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
            "First pixel is not black", 0.0, pRGBStart[0].Blue, 1E-12);
        CPPUNIT_ASSERT_EQUAL_MESSAGE( "First pixel is not fully transparent",
                                0.0, pARGBStart[0].Alpha);
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
            "Second pixel is not opaque", 1.0, pARGBStart[1].Alpha, 1E-12);
    }

    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Second pixel is not black",
                            0.0, pRGBStart[1].Red);
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Second pixel is not black",
                            0.0, pRGBStart[1].Green);
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Second pixel is not black",
                            0.0, pRGBStart[1].Blue);

    if( !bHasPalette )
    {
        const Color aCol(COL_GREEN);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
            "Sixth pixel is not green (red component)",
            vcl::unotools::toDoubleColor(aCol.GetRed()), pRGBStart[5].Red);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
            "Sixth pixel is not green (green component)",
            vcl::unotools::toDoubleColor(aCol.GetGreen()), pRGBStart[5].Green);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
            "Sixth pixel is not green (blue component)",
            vcl::unotools::toDoubleColor(aCol.GetBlue()), pRGBStart[5].Blue);
    }
    else
    {
        uno::Reference<rendering::XBitmapPalette> xPal = xBmp->getPalette();
        CPPUNIT_ASSERT_MESSAGE( "8bit or less: missing palette",
                                xPal.is());
        CPPUNIT_ASSERT_EQUAL_MESSAGE( "Palette incorrect entry count",
                                static_cast<sal_Int32>(1 << nOriginalDepth), xPal->getNumberOfEntries());
        uno::Sequence<double> aIndex;
        CPPUNIT_ASSERT_MESSAGE( "Palette is not read-only",
                                !xPal->setIndex(aIndex,true,0));
        CPPUNIT_ASSERT_MESSAGE( "Palette entry 0 is not opaque",
                                xPal->getIndex(aIndex,0));
        CPPUNIT_ASSERT_MESSAGE( "Palette has no valid color space",
                                xPal->getColorSpace().is());
    }

    if( nOriginalDepth <= 8 )
        return;

    uno::Sequence<sal_Int8> aPixel3, aPixel4;

    const Color aCol(COL_GREEN);
    uno::Sequence<rendering::ARGBColor> aARGBColor
    {
        {
            1.0,
            vcl::unotools::toDoubleColor(aCol.GetRed()),
            vcl::unotools::toDoubleColor(aCol.GetGreen()),
            vcl::unotools::toDoubleColor(aCol.GetBlue())
        }
    };

    aPixel3 = xBmp->convertIntegerFromARGB( aARGBColor );
    aPixel4 = xBmp->getPixel( aLayout, geometry::IntegerPoint2D(5,0) );
    CPPUNIT_ASSERT_MESSAGE( "Green pixel from bitmap mismatch with manually converted green pixel",
                            bool(aPixel3 == aPixel4));

    if( !aContainedBmp.HasAlpha() )
    {
        uno::Sequence<rendering::RGBColor>  aRGBColor
        {
            {
                vcl::unotools::toDoubleColor(aCol.GetRed()),
                vcl::unotools::toDoubleColor(aCol.GetGreen()),
                vcl::unotools::toDoubleColor(aCol.GetBlue())
            }
        };
        aPixel3 = xBmp->convertIntegerFromRGB( aRGBColor );
        CPPUNIT_ASSERT_MESSAGE( "Green pixel from bitmap mismatch with manually RGB-converted green pixel",
                                bool(aPixel3 == aPixel4));
    }

}

class TestBitmap : public cppu::WeakImplHelper< rendering::XIntegerReadOnlyBitmap,
                                                 rendering::XBitmapPalette,
                                                 rendering::XIntegerBitmapColorSpace >
{
private:
    geometry::IntegerSize2D        maSize;
    uno::Sequence<sal_Int8>        maComponentTags;
    uno::Sequence<sal_Int32>       maComponentBitCounts;
    rendering::IntegerBitmapLayout maLayout;
    const sal_Int32                mnBitsPerPixel;

    // XBitmap
    virtual geometry::IntegerSize2D SAL_CALL getSize() override { return maSize; }
    virtual sal_Bool SAL_CALL hasAlpha(  ) override { return mnBitsPerPixel != 8; }
    virtual uno::Reference< rendering::XBitmap > SAL_CALL getScaledBitmap( const geometry::RealSize2D&,
                                                                           sal_Bool ) override { return this; }

    // XIntegerReadOnlyBitmap
    virtual uno::Sequence< ::sal_Int8 > SAL_CALL getData( rendering::IntegerBitmapLayout&     bitmapLayout,
                                                          const geometry::IntegerRectangle2D& rect ) override
    {
        CPPUNIT_ASSERT_MESSAGE( "X1 out of bounds", rect.X1 >= 0 );
        CPPUNIT_ASSERT_MESSAGE( "Y1 out of bounds", rect.Y1 >= 0 );
        CPPUNIT_ASSERT_MESSAGE( "X2 out of bounds", rect.X2 <= maSize.Width );
        CPPUNIT_ASSERT_MESSAGE( "Y2 out of bounds", rect.Y2 <= maSize.Height );

        bitmapLayout = getMemoryLayout();

        const sal_Int32 nWidth  = rect.X2-rect.X1;
        const sal_Int32 nHeight = rect.Y2-rect.Y1;
        const sal_Int32 nScanlineLen = (nWidth * mnBitsPerPixel + 7)/8;
        uno::Sequence<sal_Int8> aRes( nScanlineLen * nHeight );
        sal_Int8* pOut = aRes.getArray();

        bitmapLayout.ScanLines     = nHeight;
        bitmapLayout.ScanLineBytes =
        bitmapLayout.ScanLineStride= nScanlineLen;

        if( mnBitsPerPixel == 8 )
        {
            for( sal_Int32 y=0; y<nHeight; ++y )
            {
                for( sal_Int32 x=0; x<nWidth; ++x )
                    pOut[ y*nScanlineLen + x ] = sal_Int8(x);
            }
        }
        else
        {
            for( sal_Int32 y=0; y<nHeight; ++y )
            {
                for( sal_Int32 x=0; x<nWidth; ++x )
                {
                    pOut[ y*nScanlineLen + 4*x     ] = sal_Int8(rect.X1);
                    pOut[ y*nScanlineLen + 4*x + 1 ] = sal_Int8(rect.Y2);
                    pOut[ y*nScanlineLen + 4*x + 2 ] = sal_Int8(x);
                    pOut[ y*nScanlineLen + 4*x + 3 ] = -1; // alpha, fully opaque
                }
            }
        }

        return aRes;
    }

    virtual uno::Sequence< ::sal_Int8 > SAL_CALL getPixel( rendering::IntegerBitmapLayout&,
                                                           const geometry::IntegerPoint2D&  ) override
    {
        CPPUNIT_ASSERT_MESSAGE("getPixel: method not implemented", false);
        return uno::Sequence< sal_Int8 >();
    }

    /// @throws uno::RuntimeException
    uno::Reference< rendering::XBitmapPalette > getPalette(  )
    {
        uno::Reference< XBitmapPalette > aRet;
        if( mnBitsPerPixel == 8 )
            aRet.set(this);
        return aRet;
    }

    virtual rendering::IntegerBitmapLayout SAL_CALL getMemoryLayout(  ) override
    {
        rendering::IntegerBitmapLayout aLayout( maLayout );

        const sal_Int32 nScanlineLen = (maSize.Width * mnBitsPerPixel + 7)/8;

        aLayout.ScanLines     = maSize.Height;
        aLayout.ScanLineBytes =
        aLayout.ScanLineStride= nScanlineLen;
        aLayout.Palette = getPalette();
        aLayout.ColorSpace.set( this );

        return aLayout;
    }

    // XBitmapPalette
    virtual sal_Int32 SAL_CALL getNumberOfEntries() override
    {
        CPPUNIT_ASSERT_MESSAGE( "Got palette getNumberOfEntries interface call without handing out palette",
                                getPalette().is() );

        return 255;
    }

    virtual sal_Bool SAL_CALL getIndex( uno::Sequence< double >& entry,
                                          ::sal_Int32 nIndex ) override
    {
        CPPUNIT_ASSERT_MESSAGE( "Got palette getIndex interface call without handing out palette",
                                getPalette().is() );
        CPPUNIT_ASSERT_MESSAGE( "getIndex: index out of range",
                                nIndex >= 0 );
        CPPUNIT_ASSERT_MESSAGE( "getIndex: index out of range",
                                nIndex < 256 );
        entry = colorToStdColorSpaceSequence(
            Color(sal_uInt8(nIndex),
                  sal_uInt8(nIndex),
                  sal_uInt8(nIndex)) );

        return true; // no palette transparency here.
    }

    virtual sal_Bool SAL_CALL setIndex( const uno::Sequence< double >&,
                                          sal_Bool,
                                          ::sal_Int32 nIndex ) override
    {
        CPPUNIT_ASSERT_MESSAGE( "Got palette setIndex interface call without handing out palette",
                                getPalette().is());
        CPPUNIT_ASSERT_MESSAGE( "setIndex: index out of range",
                                nIndex >= 0);
        CPPUNIT_ASSERT_MESSAGE( "setIndex: index out of range",
                                nIndex < 256);
        return false;
    }

    virtual uno::Reference< rendering::XColorSpace > SAL_CALL getColorSpace(  ) override
    {
        // this is the method from XBitmapPalette. Return palette color
        // space here
        static uno::Reference<rendering::XColorSpace> aColorSpace =
            vcl::unotools::createStandardColorSpace();
        return aColorSpace;
    }

    // XIntegerBitmapColorSpace
    virtual ::sal_Int8 SAL_CALL getType(  ) override
    {
        return rendering::ColorSpaceType::RGB;
    }

    virtual uno::Sequence< sal_Int8 > SAL_CALL getComponentTags(  ) override
    {
        return maComponentTags;
    }

    virtual ::sal_Int8 SAL_CALL getRenderingIntent(  ) override
    {
        return rendering::RenderingIntent::PERCEPTUAL;
    }

    virtual uno::Sequence< beans::PropertyValue > SAL_CALL getProperties() override
    {
        CPPUNIT_ASSERT_MESSAGE("getProperties: method not implemented", false );
        return uno::Sequence< ::beans::PropertyValue >();
    }

    virtual uno::Sequence< double > SAL_CALL convertColorSpace( const uno::Sequence< double >&,
                                                                const uno::Reference< rendering::XColorSpace >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertColorSpace: method not implemented", false);
        return uno::Sequence< double >();
    }

    virtual uno::Sequence< rendering::RGBColor > SAL_CALL convertToRGB( const uno::Sequence< double >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertToRGB: method not implemented", false);
        return uno::Sequence< rendering::RGBColor >();
    }

    virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertToARGB( const uno::Sequence< double >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertToARGB: method not implemented", false);
        return uno::Sequence< rendering::ARGBColor >();
    }

    virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertToPARGB( const uno::Sequence< double >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertToPARGB: method not implemented", false);
        return uno::Sequence< rendering::ARGBColor >();
    }

    virtual uno::Sequence< double > SAL_CALL convertFromRGB( const uno::Sequence< rendering::RGBColor >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertFromRGB: method not implemented", false);
        return uno::Sequence< double >();
    }

    virtual uno::Sequence< double > SAL_CALL convertFromARGB( const uno::Sequence< rendering::ARGBColor >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertFromARGB: this method is not expected to be called!", false);
        return uno::Sequence< double >();
    }

    virtual uno::Sequence< double > SAL_CALL convertFromPARGB( const uno::Sequence< rendering::ARGBColor >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertFromPARGB: this method is not expected to be called!", false);
        return uno::Sequence< double >();
    }

    virtual ::sal_Int32 SAL_CALL getBitsPerPixel(  ) override
    {
        return mnBitsPerPixel;
    }

    virtual uno::Sequence< ::sal_Int32 > SAL_CALL getComponentBitCounts(  ) override
    {
        return maComponentBitCounts;
    }

    virtual ::sal_Int8 SAL_CALL getEndianness(  ) override
    {
        return util::Endianness::LITTLE;
    }

    virtual uno::Sequence< double > SAL_CALL convertFromIntegerColorSpace( const uno::Sequence< ::sal_Int8 >& ,
                                                                           const uno::Reference< rendering::XColorSpace >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertFromIntegerColorSpace: method not implemented", false);
        return uno::Sequence< double >();
    }

    virtual uno::Sequence< ::sal_Int8 > SAL_CALL convertToIntegerColorSpace( const uno::Sequence< ::sal_Int8 >& ,
                                                                             const uno::Reference< rendering::XIntegerBitmapColorSpace >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertToIntegerColorSpace: method not implemented", false);
        return uno::Sequence< sal_Int8 >();
    }

    virtual uno::Sequence< rendering::RGBColor > SAL_CALL convertIntegerToRGB( const uno::Sequence< ::sal_Int8 >& deviceColor ) override
    {
        const uno::Sequence< rendering::ARGBColor > aTemp( convertIntegerToARGB(deviceColor) );
        uno::Sequence< rendering::RGBColor > aRes( aTemp.getLength() );
        std::transform(aTemp.begin(), aTemp.end(), aRes.getArray(),
            [](const rendering::ARGBColor& rColor) {
                return rendering::RGBColor(rColor.Red,
                                           rColor.Green,
                                           rColor.Blue);
        });

        return aRes;
    }

    virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertIntegerToARGB( const uno::Sequence< ::sal_Int8 >& deviceColor ) override
    {
        const std::size_t  nLen( deviceColor.getLength() );
        const sal_Int32 nBytesPerPixel(mnBitsPerPixel == 8 ? 1 : 4);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("number of channels no multiple of pixel element count",
                               0, static_cast<int>(nLen%nBytesPerPixel));

        uno::Sequence< rendering::ARGBColor > aRes( nLen / nBytesPerPixel );

        if( getPalette().is() )
        {
            std::transform(deviceColor.begin(), deviceColor.end(), aRes.getArray(),
                [](sal_Int8 nIn) {
                    auto fColor = vcl::unotools::toDoubleColor(nIn);
                    return rendering::ARGBColor(1.0, fColor, fColor, fColor);
                });
        }
        else
        {
            rendering::ARGBColor* pOut( aRes.getArray() );
            for( std::size_t i=0; i<nLen; i+=4 )
            {
                *pOut++ = rendering::ARGBColor(
                    vcl::unotools::toDoubleColor(deviceColor[i+3]),
                    vcl::unotools::toDoubleColor(deviceColor[i+0]),
                    vcl::unotools::toDoubleColor(deviceColor[i+1]),
                    vcl::unotools::toDoubleColor(deviceColor[i+2]));
            }
        }

        return aRes;
    }

    virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertIntegerToPARGB(
        const uno::Sequence< ::sal_Int8 >& deviceColor) override
    {
        const std::size_t  nLen( deviceColor.getLength() );
        const sal_Int32 nBytesPerPixel(mnBitsPerPixel == 8 ? 1 : 4);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("number of channels no multiple of pixel element count",
                               0, static_cast<int>(nLen%nBytesPerPixel));

        uno::Sequence< rendering::ARGBColor > aRes( nLen / nBytesPerPixel );

        if( getPalette().is() )
        {
            std::transform(deviceColor.begin(), deviceColor.end(), aRes.getArray(),
                [](sal_Int8 nIn) {
                    auto fColor = vcl::unotools::toDoubleColor(nIn);
                    return rendering::ARGBColor(1.0, fColor, fColor, fColor);
                });
        }
        else
        {
            rendering::ARGBColor* pOut( aRes.getArray() );
            for( std::size_t i=0; i<nLen; i+=4 )
            {
                const double fAlpha=vcl::unotools::toDoubleColor(deviceColor[i+3]);
                *pOut++ = rendering::ARGBColor(
                    fAlpha,
                    fAlpha*vcl::unotools::toDoubleColor(deviceColor[i+0]),
                    fAlpha*vcl::unotools::toDoubleColor(deviceColor[i+1]),
                    fAlpha*vcl::unotools::toDoubleColor(deviceColor[i+2]));
            }
        }

        return aRes;
    }

    virtual uno::Sequence< ::sal_Int8 > SAL_CALL convertIntegerFromRGB(
        const uno::Sequence< rendering::RGBColor >&) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertIntegerFromRGB: method not implemented", false);
        return uno::Sequence< sal_Int8 >();
    }

    virtual uno::Sequence< ::sal_Int8 > SAL_CALL convertIntegerFromARGB( const uno::Sequence< rendering::ARGBColor >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertIntegerFromARGB: method not implemented", false);
        return uno::Sequence< sal_Int8 >();
    }

    virtual uno::Sequence< ::sal_Int8 > SAL_CALL convertIntegerFromPARGB( const uno::Sequence< rendering::ARGBColor >& ) override
    {
        CPPUNIT_ASSERT_MESSAGE("convertIntegerFromPARGB: method not implemented", false);
        return uno::Sequence< sal_Int8 >();
    }

public:
    TestBitmap( const geometry::IntegerSize2D& rSize, bool bPalette ) :
        maSize(rSize),
        maComponentTags(),
        maComponentBitCounts(),
        maLayout(),
        mnBitsPerPixel( bPalette ? 8 : 32 )
    {
        if( bPalette )
        {
            maComponentTags = { rendering::ColorComponentTag::INDEX };
            maComponentBitCounts = { 8 };
        }
        else
        {
            maComponentTags.realloc(4);
            sal_Int8* pTags = maComponentTags.getArray();
            pTags[0]        = rendering::ColorComponentTag::RGB_BLUE;
            pTags[1]        = rendering::ColorComponentTag::RGB_GREEN;
            pTags[2]        = rendering::ColorComponentTag::RGB_RED;
            pTags[3]        = rendering::ColorComponentTag::ALPHA;

            maComponentBitCounts.realloc(4);
            sal_Int32* pCounts = maComponentBitCounts.getArray();
            pCounts[0]         = 8;
            pCounts[1]         = 8;
            pCounts[2]         = 8;
            pCounts[3]         = 8;
        }

        maLayout.ScanLines      = 0;
        maLayout.ScanLineBytes  = 0;
        maLayout.ScanLineStride = 0;
        maLayout.PlaneStride    = 0;
        maLayout.ColorSpace.clear();
        maLayout.Palette.clear();
        maLayout.IsMsbFirst     = false;
    }
};

void CanvasBitmapTest::runTest()
{
    static vcl::PixelFormat ePixelFormatArray[] =
    {
        vcl::PixelFormat::N8_BPP,
        vcl::PixelFormat::N24_BPP
    };

    // Testing VclCanvasBitmap wrapper

    for (auto const pixelFormat : ePixelFormatArray)
    {
        const sal_uInt16 nDepth = sal_uInt16(pixelFormat);
        Bitmap aBitmap(Size(200,200), pixelFormat);
        aBitmap.Erase(COL_WHITE);
        {
            BitmapScopedWriteAccess pAcc(aBitmap);
            if( pAcc.get() )
            {
                BitmapColor aBlack(0);
                BitmapColor aWhite(0);
                if( pAcc->HasPalette() )
                {
                    aBlack.SetIndex( sal::static_int_cast<sal_Int8>(pAcc->GetBestPaletteIndex(BitmapColor(0,0,0))) );
                    aWhite.SetIndex( sal::static_int_cast<sal_Int8>(pAcc->GetBestPaletteIndex(BitmapColor(255,255,255))) );
                }
                else
                {
                    aBlack = COL_BLACK;
                    aWhite = COL_WHITE;
                }
                pAcc->SetFillColor(COL_GREEN);
                pAcc->FillRect(tools::Rectangle(0,0,100,100));
                pAcc->SetPixel(0,0,aWhite);
                pAcc->SetPixel(0,1,aBlack);
                pAcc->SetPixel(0,2,aWhite);
            }
        }

        rtl::Reference<VclCanvasBitmap> xBmp( new VclCanvasBitmap(aBitmap) );

        checkCanvasBitmap( xBmp, "single bitmap", nDepth );

        AlphaMask aMask(Size(200,200));
        aMask.Erase(255);
        {
            BitmapScopedWriteAccess pAcc(aMask);
            if( pAcc.get() )
            {
                pAcc->SetFillColor(COL_ALPHA_OPAQUE);
                pAcc->FillRect(tools::Rectangle(0,0,100,100));
                pAcc->SetPixel(0,0,BitmapColor(0));
                pAcc->SetPixel(0,1,BitmapColor(255));
                pAcc->SetPixel(0,2,BitmapColor(0));
            }
        }

        xBmp.set( new VclCanvasBitmap(Bitmap(aBitmap,aMask)) );

        checkCanvasBitmap( xBmp, "masked bitmap", nDepth );

        AlphaMask aAlpha(Size(200,200));
        aAlpha.Erase(0);
        {
            BitmapScopedWriteAccess pAcc(aAlpha);
            if( pAcc )
            {
                pAcc->SetFillColor(COL_ALPHA_OPAQUE);
                pAcc->FillRect(tools::Rectangle(0,0,100,100));
                pAcc->SetPixel(0,0,BitmapColor(0));
                pAcc->SetPixel(0,1,BitmapColor(255));
                pAcc->SetPixel(0,2,BitmapColor(0));
            }
        }

        xBmp.set( new VclCanvasBitmap(Bitmap(aBitmap,aAlpha)) );

        checkCanvasBitmap( xBmp, "alpha bitmap", nDepth );
    }

    // Testing XBitmap import

    uno::Reference< rendering::XIntegerReadOnlyBitmap > xTestBmp(
        new TestBitmap( geometry::IntegerSize2D(10,10), true ));

    Bitmap aBmp = vcl::unotools::bitmapFromXBitmap(xTestBmp);
    CPPUNIT_ASSERT_MESSAGE( "Palette bitmap is alpha",
                            !aBmp.HasAlpha());
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Bitmap does not have size (10,10)",
                            Size(10,10), aBmp.GetSizePixel());
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Bitmap does not have the expected pixel format",
                            vcl::PixelFormat::N8_BPP,  aBmp.getPixelFormat());
    {
        BitmapScopedReadAccess pBmpAcc(aBmp);

        CPPUNIT_ASSERT_MESSAGE( "Bitmap has invalid BitmapReadAccess",
                                pBmpAcc );

        CPPUNIT_ASSERT_EQUAL_MESSAGE("(0,0) incorrect content",
                               BitmapColor(0), pBmpAcc->GetPixel(0,0));
        CPPUNIT_ASSERT_EQUAL_MESSAGE("(2,2) incorrect content",
                               BitmapColor(2), pBmpAcc->GetPixel(2,2));
        CPPUNIT_ASSERT_EQUAL_MESSAGE("(9,2) incorrect content",
                               BitmapColor(9), pBmpAcc->GetPixel(2,9));
    }

    xTestBmp.set( new TestBitmap( geometry::IntegerSize2D(10,10), false ));

    aBmp = vcl::unotools::bitmapFromXBitmap(xTestBmp);
    CPPUNIT_ASSERT_MESSAGE( "Palette bitmap has no alpha",
                            aBmp.HasAlpha());
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Bitmap does not have size (10,10)",
                            Size(10,10), aBmp.GetSizePixel());
    CPPUNIT_ASSERT_EQUAL_MESSAGE( "Bitmap does not have the expected pixel format",
                            vcl::PixelFormat::N32_BPP,  aBmp.getPixelFormat());
    {
        BitmapScopedReadAccess pBmpAcc(aBmp);

        CPPUNIT_ASSERT_MESSAGE( "Bitmap has invalid BitmapReadAccess",
                                pBmpAcc);

        CPPUNIT_ASSERT_EQUAL_MESSAGE("(0,0) incorrect content",
                               BitmapColor(0,1,0), pBmpAcc->GetPixel(0,0));
        CPPUNIT_ASSERT_EQUAL_MESSAGE("(2,2) incorrect content",
                               BitmapColor(0,3,2), pBmpAcc->GetPixel(2,2));
        CPPUNIT_ASSERT_EQUAL_MESSAGE("(9,2) incorrect content",
                               BitmapColor(0,3,9), pBmpAcc->GetPixel(2,9));
    }
}

} // namespace

CPPUNIT_TEST_SUITE_REGISTRATION(CanvasBitmapTest);

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
