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#include "qpixmapdata_p.h"

#include <QtCore/qbuffer.h>

#include <QtGui/qbitmap.h>

#include <QtGui/qimagereader.h>

#include <private/qgraphicssystem_p.h>

#include <private/qapplication_p.h>

#include <private/qimagepixmapcleanuphooks_p.h>

QT_BEGIN_NAMESPACE

const uchar qt_pixmap_bit_mask[] = { 0x01, 0x02, 0x04, 0x08,

                                     0x10, 0x20, 0x40, 0x80 };

QPixmapData *QPixmapData::create(int w, int h, PixelType type)

{

    QPixmapData *data;

    QGraphicsSystem* gs = QApplicationPrivate::graphicsSystem();

    if (gs)

        data = gs->createPixmapData(static_cast<QPixmapData::PixelType>(type));

    else

        data = QGraphicsSystem::createDefaultPixmapData(static_cast<QPixmapData::PixelType>(type));

    data->resize(w, h);

    return data;

}

QPixmapData::QPixmapData(PixelType pixelType, int objectId)

    : w(0),

      h(0),

      d(0),

      is_null(true),

      ref(0),

      detach_no(0),

      type(pixelType),

      id(objectId),

      ser_no(0),

      is_cached(false)

{

}

QPixmapData::~QPixmapData()

{

    // Sometimes the pixmap cleanup hooks will be called from derrived classes, which will

    // then set is_cached to false. For example, on X11 QtOpenGL needs to delete the GLXPixmap

    // or EGL Pixmap Surface for a given pixmap _before_ the native X11 pixmap is deleted,

    // otherwise some drivers will leak the GL surface. In this case, QX11PixmapData will

    // call the cleanup hooks itself before deleting the native pixmap and set is_cached to

    // false.

    if (is_cached) {

        QImagePixmapCleanupHooks::executePixmapDataDestructionHooks(this);

        is_cached = false;

    }

}

QPixmapData *QPixmapData::createCompatiblePixmapData() const

{

    QPixmapData *d;

    QGraphicsSystem *gs = QApplicationPrivate::graphicsSystem();

    if (gs)

        d = gs->createPixmapData(pixelType());

    else

        d = QGraphicsSystem::createDefaultPixmapData(pixelType());

    return d;

}

static QImage makeBitmapCompliantIfNeeded(QPixmapData *d, const QImage &image, Qt::ImageConversionFlags flags)

{

    if (d->pixelType() == QPixmapData::BitmapType) {

        QImage img = image.convertToFormat(QImage::Format_MonoLSB, flags);

        // make sure image.color(0) == Qt::color0 (white)

        // and image.color(1) == Qt::color1 (black)

        const QRgb c0 = QColor(Qt::black).rgb();

        const QRgb c1 = QColor(Qt::white).rgb();

        if (img.color(0) == c0 && img.color(1) == c1) {

            img.invertPixels();

            img.setColor(0, c1);

            img.setColor(1, c0);

        }

        return img;

    }

    return image;

}

bool QPixmapData::fromFile(const QString &fileName, const char *format,

                           Qt::ImageConversionFlags flags)

{

    QImage image = QImageReader(fileName, format).read();

    if (image.isNull())

        return false;

    fromImage(makeBitmapCompliantIfNeeded(this, image, flags), flags);

    return !isNull();

}

bool QPixmapData::fromData(const uchar *buf, uint len, const char *format, Qt::ImageConversionFlags flags)

{

    QByteArray a = QByteArray::fromRawData(reinterpret_cast<const char *>(buf), len);

    QBuffer b(&a);

    b.open(QIODevice::ReadOnly);

    QImage image = QImageReader(&b, format).read();

    fromImage(makeBitmapCompliantIfNeeded(this, image, flags), flags);

    return !isNull();

}

void QPixmapData::copy(const QPixmapData *data, const QRect &rect)

{

    fromImage(data->toImage().copy(rect), Qt::AutoColor);

}

bool QPixmapData::scroll(int dx, int dy, const QRect &rect)

{

    Q_UNUSED(dx);

    Q_UNUSED(dy);

    Q_UNUSED(rect);

    return false;

}

void QPixmapData::setMask(const QBitmap &mask)

{

    if (mask.size().isEmpty()) {

        if (depth() != 1)

            fromImage(toImage().convertToFormat(QImage::Format_RGB32),

                      Qt::AutoColor);

    } else {

        QImage image = toImage();

        const int w = image.width();

        const int h = image.height();

        switch (image.depth()) {

        case 1: {

            const QImage imageMask = mask.toImage().convertToFormat(image.format());

            for (int y = 0; y < h; ++y) {

                const uchar *mscan = imageMask.scanLine(y);

                uchar *tscan = image.scanLine(y);

                int bytesPerLine = image.bytesPerLine();

                for (int i = 0; i < bytesPerLine; ++i)

                    tscan[i] &= mscan[i];

            }

            break;

        }

        default: {

            const QImage imageMask = mask.toImage().convertToFormat(QImage::Format_MonoLSB);

            image = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);

            for (int y = 0; y < h; ++y) {

                const uchar *mscan = imageMask.scanLine(y);

                QRgb *tscan = (QRgb *)image.scanLine(y);

                for (int x = 0; x < w; ++x) {

                    if (!(mscan[x>>3] & qt_pixmap_bit_mask[x&7]))

                        tscan[x] = 0;

                }

            }

            break;

        }

        }

        fromImage(image, Qt::AutoColor);

    }

}

QBitmap QPixmapData::mask() const

{

    if (!hasAlphaChannel())

        return QBitmap();

    const QImage img = toImage();

    const QImage image = (img.depth() < 32 ? img.convertToFormat(QImage::Format_ARGB32_Premultiplied) : img);

    const int w = image.width();

    const int h = image.height();

    QImage mask(w, h, QImage::Format_MonoLSB);

    if (mask.isNull()) // allocation failed

        return QBitmap();

    mask.setColorCount(2);

    mask.setColor(0, QColor(Qt::color0).rgba());

    mask.setColor(1, QColor(Qt::color1).rgba());

    const int bpl = mask.bytesPerLine();

    for (int y = 0; y < h; ++y) {

        const QRgb *src = reinterpret_cast<const QRgb*>(image.scanLine(y));

        uchar *dest = mask.scanLine(y);

        memset(dest, 0, bpl);

        for (int x = 0; x < w; ++x) {

            if (qAlpha(*src) > 0)

                dest[x >> 3] |= qt_pixmap_bit_mask[x & 7];

            ++src;

        }

    }

    return QBitmap::fromImage(mask);

}

QPixmap QPixmapData::transformed(const QTransform &matrix,

                                 Qt::TransformationMode mode) const

{

    return QPixmap::fromImage(toImage().transformed(matrix, mode));

}

void QPixmapData::setAlphaChannel(const QPixmap &alphaChannel)

{

    QImage image = toImage();

    image.setAlphaChannel(alphaChannel.toImage());

    fromImage(image, Qt::AutoColor);

}

QPixmap QPixmapData::alphaChannel() const

{

    return QPixmap::fromImage(toImage().alphaChannel());

}

void QPixmapData::setSerialNumber(int serNo)

{

    ser_no = serNo;

}

QImage* QPixmapData::buffer()

{

    return 0;

}

#if defined(Q_OS_SYMBIAN)

void* QPixmapData::toNativeType(NativeType /* type */)

{

    return 0;

}

void QPixmapData::fromNativeType(void* /* pixmap */, NativeType /* typre */)

{

    return;

}

#endif

QT_END_NAMESPACE