QMngHandlerPrivate Class Reference

Public Functions
QColor	backgroundColor () const
int	currentImageNumber () const
bool	getNextImage (QImage *result)
int	imageCount () const
bool	jumpToImage (int imageNumber)
bool	jumpToNextImage ()
int	nextImageDelay () const
mng_bool	processHeader (mng_uint32 iWidth, mng_uint32 iHeight)
	QMngHandlerPrivate (QMngHandler *q_ptr)
mng_bool	readData (mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pRead)
bool	setBackgroundColor (const QColor &color)
mng_bool	writeData (mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pWritten)
bool	writeImage (const QImage &image)
	~QMngHandlerPrivate ()

Public Variables
int	elapsed
int	frameCount
int	frameIndex
bool	haveReadAll
bool	haveReadNone
mng_handle	hMNG
QImage	image
mng_uint32	iStyle
int	iterCount
int	nextDelay
int	nextIndex
QMngHandler *	q_ptr

Detailed Description

Definition at line 53 of file qmnghandler.cpp.

Constructors and Destructors

QMngHandlerPrivate()

QMngHandlerPrivate::QMngHandlerPrivate

(

QMngHandler *

q_ptr

)

Definition at line 210 of file qmnghandler.cpp.

    : haveReadNone(true), haveReadAll(false), elapsed(0), nextDelay(0), iterCount(1),
      frameIndex(-1), nextIndex(0), frameCount(0), q_ptr(q_ptr)
{
    iStyle = (QSysInfo::ByteOrder == QSysInfo::LittleEndian) ? MNG_CANVAS_BGRA8 : MNG_CANVAS_ARGB8;
    // Initialize libmng
    hMNG = mng_initialize((mng_ptr)this, myalloc, myfree, mytrace);
    if (hMNG) {
    // Set callback functions
        mng_setcb_errorproc(hMNG, myerror);
        mng_setcb_openstream(hMNG, myopenstream);
        mng_setcb_closestream(hMNG, myclosestream);
        mng_setcb_readdata(hMNG, myreaddata);
        mng_setcb_writedata(hMNG, mywritedata);
        mng_setcb_processheader(hMNG, myprocessheader);
        mng_setcb_getcanvasline(hMNG, mygetcanvasline);
        mng_setcb_refresh(hMNG, myrefresh);
        mng_setcb_gettickcount(hMNG, mygettickcount);
        mng_setcb_settimer(hMNG, mysettimer);
        mng_setcb_processterm(hMNG, myprocessterm);
        mng_set_doprogressive(hMNG, MNG_FALSE);
    mng_set_suspensionmode(hMNG, MNG_TRUE);
    }
}

~QMngHandlerPrivate()

QMngHandlerPrivate::~QMngHandlerPrivate

(

)

Definition at line 235 of file qmnghandler.cpp.

{
    mng_cleanup(&hMNG);
}

Functions

backgroundColor()

QColor QMngHandlerPrivate::backgroundColor

(

)

const

Definition at line 368 of file qmnghandler.cpp.

{
    mng_uint16 iRed;
    mng_uint16 iBlue;
    mng_uint16 iGreen;
    if (mng_get_bgcolor(hMNG, &iRed, &iBlue, &iGreen) == MNG_NOERROR)
        return QColor((iRed >> 8) & 0xFF, (iGreen >> 8) & 0xFF, (iBlue >> 8) & 0xFF);
    return QColor();
}

currentImageNumber()

int QMngHandlerPrivate::currentImageNumber

(

)

const

Definition at line 317 of file qmnghandler.cpp.

Referenced by jumpToNextImage().

{
//    return mng_get_currentframe(hMNG) % imageCount(); not implemented, apparently
    return frameIndex;
}

getNextImage()

bool QMngHandlerPrivate::getNextImage

(

QImage *

result

)

Definition at line 263 of file qmnghandler.cpp.

{
    mng_retcode ret;
    const bool savedHaveReadAll = haveReadAll;
    if (haveReadNone) {
        haveReadNone = false;
        ret = mng_readdisplay(hMNG);
    } else {
        ret = mng_display_resume(hMNG);
    }
    if ((MNG_NOERROR == ret) || (MNG_NEEDTIMERWAIT == ret)) {
        *result = image;

        // QTBUG-28894 -- libmng produces an extra frame at the end
        //                of the animation on the first loop only.
        if (nextDelay == 1 && (!savedHaveReadAll && haveReadAll)) {
            ret = mng_display_resume(hMNG);
        }

        frameIndex = nextIndex++;
        if (haveReadAll && (frameCount == 0))
            frameCount = nextIndex;
        return true;
    }
    return false;
}

imageCount()

int QMngHandlerPrivate::imageCount

(

)

const

Definition at line 323 of file qmnghandler.cpp.

Referenced by jumpToNextImage().

{
//    return mng_get_totalframes(hMNG); not implemented, apparently
    if (haveReadAll)
        return frameCount;
    return 0; // Don't know
}

jumpToImage()

bool QMngHandlerPrivate::jumpToImage

(

int

imageNumber

)

Definition at line 331 of file qmnghandler.cpp.

Referenced by jumpToNextImage().

{
    if (imageNumber == nextIndex)
        return true;

    if ((imageNumber == 0) && haveReadAll && (nextIndex == frameCount)) {
        // Loop!
        nextIndex = 0;
        return true;
    }
    if (mng_display_freeze(hMNG) == MNG_NOERROR) {
        if (mng_display_goframe(hMNG, imageNumber) == MNG_NOERROR) {
            nextIndex = imageNumber;
            return true;
        }
    }
    return false;
}

jumpToNextImage()

bool QMngHandlerPrivate::jumpToNextImage

(

)

Definition at line 350 of file qmnghandler.cpp.

{
    return jumpToImage((currentImageNumber()+1) % imageCount());
}

nextImageDelay()

int QMngHandlerPrivate::nextImageDelay

(

)

const

Definition at line 355 of file qmnghandler.cpp.

{
    return nextDelay;
}

processHeader()

mng_bool QMngHandlerPrivate::processHeader	(	mng_uint32	iWidth,
		mng_uint32	iHeight
	)

Definition at line 254 of file qmnghandler.cpp.

Referenced by myprocessheader().

{
    if (mng_set_canvasstyle(hMNG, iStyle) != MNG_NOERROR)
        return MNG_FALSE;
    image = QImage(iWidth, iHeight, QImage::Format_ARGB32);
    image.fill(0);
    return MNG_TRUE;
}

readData()

mng_bool QMngHandlerPrivate::readData	(	mng_ptr	pBuf,
		mng_uint32	iSize,
		mng_uint32p	pRead
	)

Definition at line 240 of file qmnghandler.cpp.

Referenced by myreaddata().

{
    Q_Q(QMngHandler);
    *pRead = q->device()->read((char *)pBuf, iSize);
    return (*pRead > 0) ? MNG_TRUE : MNG_FALSE;
}

setBackgroundColor()

bool QMngHandlerPrivate::setBackgroundColor

(

const QColor &

color

)

Definition at line 360 of file qmnghandler.cpp.

{
    mng_uint16 iRed = (mng_uint16)(color.red() << 8);
    mng_uint16 iBlue = (mng_uint16)(color.blue() << 8);
    mng_uint16 iGreen = (mng_uint16)(color.green() << 8);
    return (mng_set_bgcolor(hMNG, iRed, iBlue, iGreen) == MNG_NOERROR);
}

writeData()

mng_bool QMngHandlerPrivate::writeData	(	mng_ptr	pBuf,
		mng_uint32	iSize,
		mng_uint32p	pWritten
	)

Definition at line 247 of file qmnghandler.cpp.

Referenced by mywritedata().

{
    Q_Q(QMngHandler);
    *pWritten = q->device()->write((char *)pBuf, iSize);
    return MNG_TRUE;
}

writeImage()

bool QMngHandlerPrivate::writeImage

(

const QImage &

image

)

Definition at line 290 of file qmnghandler.cpp.

{
    mng_reset(hMNG);
    if (mng_create(hMNG) != MNG_NOERROR)
    return false;

    this->image = image.convertToFormat(QImage::Format_ARGB32);
    int w = image.width();
    int h = image.height();

    if (
    // width, height, ticks, layercount, framecount, playtime, simplicity
         (mng_putchunk_mhdr(hMNG, w, h, 1000, 0, 0, 0, 7) == MNG_NOERROR) &&
    // termination_action, action_after_iterations, delay, iteration_max
         (mng_putchunk_term(hMNG, 3, 0, 1, 0x7FFFFFFF) == MNG_NOERROR) &&
    // width, height, bitdepth, colortype, compression, filter, interlace
         (mng_putchunk_ihdr(hMNG, w, h, 8, 6, 0, 0, 0) == MNG_NOERROR) &&
    // width, height, colortype, bitdepth, compression, filter, interlace, canvasstyle, getcanvasline
         (mng_putimgdata_ihdr(hMNG, w, h, 6, 8, 0, 0, 0, iStyle, mygetcanvasline) == MNG_NOERROR) &&
         (mng_putchunk_iend(hMNG) == MNG_NOERROR) &&
         (mng_putchunk_mend(hMNG) == MNG_NOERROR) &&
         (mng_write(hMNG) == MNG_NOERROR)
        )
        return true;
    return false;
}

Properties

elapsed

int QMngHandlerPrivate::elapsed

Definition at line 61 of file qmnghandler.cpp.

Referenced by mygettickcount(), and mysettimer().

frameCount

int QMngHandlerPrivate::frameCount

Definition at line 66 of file qmnghandler.cpp.

Referenced by getNextImage(), imageCount(), and jumpToImage().

frameIndex

int QMngHandlerPrivate::frameIndex

Definition at line 64 of file qmnghandler.cpp.

Referenced by currentImageNumber(), and getNextImage().

haveReadAll

bool QMngHandlerPrivate::haveReadAll

Definition at line 58 of file qmnghandler.cpp.

Referenced by getNextImage(), imageCount(), jumpToImage(), and myclosestream().

haveReadNone

bool QMngHandlerPrivate::haveReadNone

Definition at line 57 of file qmnghandler.cpp.

Referenced by getNextImage().

hMNG

mng_handle QMngHandlerPrivate::hMNG

Definition at line 59 of file qmnghandler.cpp.

Referenced by backgroundColor(), getNextImage(), jumpToImage(), processHeader(), QMngHandlerPrivate(), setBackgroundColor(), writeImage(), and ~QMngHandlerPrivate().

image

QImage QMngHandlerPrivate::image

Definition at line 60 of file qmnghandler.cpp.

Referenced by getNextImage(), mygetcanvasline(), and processHeader().

iStyle

mng_uint32 QMngHandlerPrivate::iStyle

Definition at line 67 of file qmnghandler.cpp.

Referenced by processHeader(), QMngHandlerPrivate(), and writeImage().

iterCount

int QMngHandlerPrivate::iterCount

Definition at line 63 of file qmnghandler.cpp.

Referenced by myprocessterm().

nextDelay

int QMngHandlerPrivate::nextDelay

Definition at line 62 of file qmnghandler.cpp.

Referenced by getNextImage(), mysettimer(), and nextImageDelay().

nextIndex

int QMngHandlerPrivate::nextIndex

Definition at line 65 of file qmnghandler.cpp.

Referenced by getNextImage(), and jumpToImage().

q_ptr

QMngHandler* QMngHandlerPrivate::q_ptr

Definition at line 82 of file qmnghandler.cpp.

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The documentation for this class was generated from the following file:

• /src/gui/image/qmnghandler.cpp