/*  This file is part of the KDE project.+
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Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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+
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This library is free software: you can redistribute it and/or modify+
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it under the terms of the GNU Lesser General Public License as published by+
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the Free Software Foundation, either version 2.1 or 3 of the License.+
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+
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This library is distributed in the hope that it will be useful,+
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but WITHOUT ANY WARRANTY; without even the implied warranty of+
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the+
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GNU Lesser General Public License for more details.+
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+
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You should have received a copy of the GNU Lesser General Public License+
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along with this library.  If not, see <http://www.gnu.org/licenses/>.+
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+
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*/+
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+
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#include "utils.h"+
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#include <e32std.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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using namespace Phonon;+
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using namespace Phonon::MMF;+
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+
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/*! \namespace MMF::Utils+
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  \internal+
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*/+
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+
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/*! \class MMF::TTraceContext+
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  \internal+
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*/+
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+
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/*! \class MMF::Utils+
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  \internal+
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*/+
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+
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_LIT(PanicCategory, "Phonon::MMF");+
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+
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void MMF::Utils::panic(PanicCode code)+
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{+
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    User::Panic(PanicCategory, code);+
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}+
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+
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+
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static const TInt KMimePrefixLength = 6; // either "audio/" or "video/"+
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_LIT(KMimePrefixAudio, "audio/");+
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_LIT(KMimePrefixVideo, "video/");+
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+
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MMF::MediaType MMF::Utils::mimeTypeToMediaType(const TDesC& mimeType)+
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{+
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    MediaType result = MediaTypeUnknown;+
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+
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    if (mimeType.Left(KMimePrefixLength).Compare(KMimePrefixAudio) == 0) {+
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        result = MediaTypeAudio;+
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    } else if (mimeType.Left(KMimePrefixLength).Compare(KMimePrefixVideo) == 0) {+
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        result = MediaTypeVideo;+
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    }+
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+
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    return result;+
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}+
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+
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+
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#ifndef QT_NO_DEBUG+
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+
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#include <hal.h>+
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#include <hal_data.h>+
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#include <gdi.h>+
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#include <eikenv.h>+
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+
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struct TScreenInfo+
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{+
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    int width;+
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    int height;+
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    int bpp;+
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    const char* address;+
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    int initialOffset;+
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    int lineOffset;+
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    TDisplayMode displayMode;+
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};+
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+
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static void getScreenInfoL(TScreenInfo& info)+
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{+
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    info.displayMode = CEikonEnv::Static()->ScreenDevice()->DisplayMode();+
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+
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    // Then we must set these as the input parameter+
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    info.width = info.displayMode;+
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    info.height = info.displayMode;+
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    info.initialOffset = info.displayMode;+
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    info.lineOffset = info.displayMode;+
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    info.bpp = info.displayMode;+
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+
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    User::LeaveIfError( HAL::Get(HALData::EDisplayXPixels, info.width) );+
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    User::LeaveIfError( HAL::Get(HALData::EDisplayYPixels, info.width) );+
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+
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    int address;+
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    User::LeaveIfError( HAL::Get(HALData::EDisplayMemoryAddress, address) );+
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    info.address = reinterpret_cast<const char*>(address);+
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+
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    User::LeaveIfError( HAL::Get(HALData::EDisplayOffsetToFirstPixel, info.initialOffset) );+
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+
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    User::LeaveIfError( HAL::Get(HALData::EDisplayOffsetBetweenLines, info.lineOffset) );+
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+
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    User::LeaveIfError( HAL::Get(HALData::EDisplayBitsPerPixel, info.bpp) );+
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}+
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+
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+
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QColor MMF::Utils::getScreenPixel(const QPoint& pos)+
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{+
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    TScreenInfo info;+
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    TRAPD(err, getScreenInfoL(info));+
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    QColor pixel;+
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    if (err == KErrNone and pos.x() < info.width and pos.y() < info.height)+
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    {+
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        const int bytesPerPixel = info.bpp / 8;+
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        Q_ASSERT(bytesPerPixel >= 3);+
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+
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        const int stride = (info.width * bytesPerPixel) + info.lineOffset;+
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+
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        const char* ptr =+
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                info.address+
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            +    info.initialOffset+
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            +    pos.y() * stride+
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            +    pos.x() * bytesPerPixel;+
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+
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        // BGRA+
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        pixel.setBlue(*ptr++);+
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        pixel.setGreen(*ptr++);+
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        pixel.setRed(*ptr++);+
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+
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        if (bytesPerPixel == 4)+
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            pixel.setAlpha(*ptr++);+
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    }+
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    return pixel;+
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}+
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+
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// Debugging: for debugging video visibility+
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void MMF::Utils::dumpScreenPixelSample()+
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{+
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    for (int i=0; i<20; ++i) {+
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        const QPoint pos(i*10, i*10);+
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        const QColor pixel = Utils::getScreenPixel(pos);+
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        RDebug::Printf(+
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            "Phonon::MMF::Utils::dumpScreenPixelSample %d %d = %d %d %d %d",+
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            pos.x(), pos.y(), pixel.red(), pixel.green(), pixel.blue(), pixel.alpha()+
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        );+
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    }+
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}+
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+
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#endif // _DEBUG+
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+
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QT_END_NAMESPACE+
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+
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