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Diffstat (limited to 'src/gui/image/qmnghandler.cpp')
| -rw-r--r-- | src/gui/image/qmnghandler.cpp | 497 |
1 files changed, 497 insertions, 0 deletions
diff --git a/src/gui/image/qmnghandler.cpp b/src/gui/image/qmnghandler.cpp new file mode 100644 index 0000000..ec442a1 --- /dev/null +++ b/src/gui/image/qmnghandler.cpp @@ -0,0 +1,497 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qmnghandler.h" + +#include "qimage.h" +#include "qvariant.h" +#include "qcolor.h" + +#define MNG_USE_SO +#include <libmng.h> + +QT_BEGIN_NAMESPACE + +class QMngHandlerPrivate +{ + Q_DECLARE_PUBLIC(QMngHandler) + public: + bool haveReadNone; + bool haveReadAll; + mng_handle hMNG; + QImage image; + int elapsed; + int nextDelay; + int iterCount; + int frameIndex; + int nextIndex; + int frameCount; + mng_uint32 iStyle; + mng_bool readData(mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pRead); + mng_bool writeData(mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pWritten); + mng_bool processHeader(mng_uint32 iWidth, mng_uint32 iHeight); + QMngHandlerPrivate(QMngHandler *q_ptr); + ~QMngHandlerPrivate(); + bool getNextImage(QImage *result); + bool writeImage(const QImage &image); + int currentImageNumber() const; + int imageCount() const; + bool jumpToImage(int imageNumber); + bool jumpToNextImage(); + int nextImageDelay() const; + bool setBackgroundColor(const QColor &color); + QColor backgroundColor() const; + QMngHandler *q_ptr; +}; + +static mng_bool myerror(mng_handle /*hMNG*/, + mng_int32 iErrorcode, + mng_int8 /*iSeverity*/, + mng_chunkid iChunkname, + mng_uint32 /*iChunkseq*/, + mng_int32 iExtra1, + mng_int32 iExtra2, + mng_pchar zErrortext) +{ + qWarning("MNG error %d: %s; chunk %c%c%c%c; subcode %d:%d", + iErrorcode,zErrortext, + (iChunkname>>24)&0xff, + (iChunkname>>16)&0xff, + (iChunkname>>8)&0xff, + (iChunkname>>0)&0xff, + iExtra1,iExtra2); + return TRUE; +} + +static mng_ptr myalloc(mng_size_t iSize) +{ +#if defined(Q_OS_WINCE) + mng_ptr ptr = malloc(iSize); + memset(ptr, 0, iSize); + return ptr; +#else + return (mng_ptr)calloc(1, iSize); +#endif +} + +static void myfree(mng_ptr pPtr, mng_size_t /*iSize*/) +{ + free(pPtr); +} + +static mng_bool myopenstream(mng_handle) +{ + return MNG_TRUE; +} + +static mng_bool myclosestream(mng_handle hMNG) +{ + QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG)); + pMydata->haveReadAll = true; + return MNG_TRUE; +} + +static mng_bool myreaddata(mng_handle hMNG, + mng_ptr pBuf, + mng_uint32 iSize, + mng_uint32p pRead) +{ + QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG)); + return pMydata->readData(pBuf, iSize, pRead); +} + +static mng_bool mywritedata(mng_handle hMNG, + mng_ptr pBuf, + mng_uint32 iSize, + mng_uint32p pWritten) +{ + QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG)); + return pMydata->writeData(pBuf, iSize, pWritten); +} + +static mng_bool myprocessheader(mng_handle hMNG, + mng_uint32 iWidth, + mng_uint32 iHeight) +{ + QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG)); + return pMydata->processHeader(iWidth, iHeight); +} + +static mng_ptr mygetcanvasline(mng_handle hMNG, + mng_uint32 iLinenr) +{ + QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG)); + return (mng_ptr)pMydata->image.scanLine(iLinenr); +} + +static mng_bool myrefresh(mng_handle /*hMNG*/, + mng_uint32 /*iX*/, + mng_uint32 /*iY*/, + mng_uint32 /*iWidth*/, + mng_uint32 /*iHeight*/) +{ + return MNG_TRUE; +} + +static mng_uint32 mygettickcount(mng_handle hMNG) +{ + QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG)); + return pMydata->elapsed++; +} + +static mng_bool mysettimer(mng_handle hMNG, + mng_uint32 iMsecs) +{ + QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG)); + pMydata->elapsed += iMsecs; + pMydata->nextDelay = iMsecs; + return MNG_TRUE; +} + +static mng_bool myprocessterm(mng_handle hMNG, + mng_uint8 iTermaction, + mng_uint8 /*iIteraction*/, + mng_uint32 /*iDelay*/, + mng_uint32 iItermax) +{ + QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG)); + if (iTermaction == 3) + pMydata->iterCount = iItermax; + return MNG_TRUE; +} + +static mng_bool mytrace(mng_handle, + mng_int32 iFuncnr, + mng_int32 iFuncseq, + mng_pchar zFuncname) +{ + qDebug("mng trace: iFuncnr: %d iFuncseq: %d zFuncname: %s", iFuncnr, iFuncseq, zFuncname); + return MNG_TRUE; +} + +QMngHandlerPrivate::QMngHandlerPrivate(QMngHandler *q_ptr) + : 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() +{ + mng_cleanup(&hMNG); +} + +mng_bool QMngHandlerPrivate::readData(mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pRead) +{ + Q_Q(QMngHandler); + *pRead = q->device()->read((char *)pBuf, iSize); + return (*pRead > 0) ? MNG_TRUE : MNG_FALSE; +} + +mng_bool QMngHandlerPrivate::writeData(mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pWritten) +{ + Q_Q(QMngHandler); + *pWritten = q->device()->write((char *)pBuf, iSize); + return MNG_TRUE; +} + +mng_bool QMngHandlerPrivate::processHeader(mng_uint32 iWidth, mng_uint32 iHeight) +{ + if (mng_set_canvasstyle(hMNG, iStyle) != MNG_NOERROR) + return MNG_FALSE; + image = QImage(iWidth, iHeight, QImage::Format_ARGB32); + image.fill(0); + return MNG_TRUE; +} + +bool QMngHandlerPrivate::getNextImage(QImage *result) +{ + mng_retcode ret; + if (haveReadNone) { + haveReadNone = false; + ret = mng_readdisplay(hMNG); + } else { + ret = mng_display_resume(hMNG); + } + if ((MNG_NOERROR == ret) || (MNG_NEEDTIMERWAIT == ret)) { + *result = image; + frameIndex = nextIndex++; + if (haveReadAll && (frameCount == 0)) + frameCount = nextIndex; + return true; + } + return false; +} + +bool QMngHandlerPrivate::writeImage(const QImage &image) +{ + 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; +} + +int QMngHandlerPrivate::currentImageNumber() const +{ +// return mng_get_currentframe(hMNG) % imageCount(); not implemented, apparently + return frameIndex; +} + +int QMngHandlerPrivate::imageCount() const +{ +// return mng_get_totalframes(hMNG); not implemented, apparently + if (haveReadAll) + return frameCount; + return 0; // Don't know +} + +bool QMngHandlerPrivate::jumpToImage(int imageNumber) +{ + 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; +} + +bool QMngHandlerPrivate::jumpToNextImage() +{ + return jumpToImage((currentImageNumber()+1) % imageCount()); +} + +int QMngHandlerPrivate::nextImageDelay() const +{ + return nextDelay; +} + +bool QMngHandlerPrivate::setBackgroundColor(const QColor &color) +{ + 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); +} + +QColor QMngHandlerPrivate::backgroundColor() const +{ + 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(); +} + +QMngHandler::QMngHandler() + : d_ptr(new QMngHandlerPrivate(this)) +{ +} + +QMngHandler::~QMngHandler() +{ +} + +/*! \reimp */ +bool QMngHandler::canRead() const +{ + Q_D(const QMngHandler); + if ((!d->haveReadNone + && (!d->haveReadAll || (d->haveReadAll && (d->nextIndex < d->frameCount)))) + || canRead(device())) + { + setFormat("mng"); + return true; + } + return false; +} + +/*! \internal */ +bool QMngHandler::canRead(QIODevice *device) +{ + if (!device) { + qWarning("QMngHandler::canRead() called with no device"); + return false; + } + + return device->peek(8) == "\x8A\x4D\x4E\x47\x0D\x0A\x1A\x0A"; +} + +/*! \reimp */ +QByteArray QMngHandler::name() const +{ + return "mng"; +} + +/*! \reimp */ +bool QMngHandler::read(QImage *image) +{ + Q_D(QMngHandler); + return canRead() ? d->getNextImage(image) : false; +} + +/*! \reimp */ +bool QMngHandler::write(const QImage &image) +{ + Q_D(QMngHandler); + return d->writeImage(image); +} + +/*! \reimp */ +int QMngHandler::currentImageNumber() const +{ + Q_D(const QMngHandler); + return d->currentImageNumber(); +} + +/*! \reimp */ +int QMngHandler::imageCount() const +{ + Q_D(const QMngHandler); + return d->imageCount(); +} + +/*! \reimp */ +bool QMngHandler::jumpToImage(int imageNumber) +{ + Q_D(QMngHandler); + return d->jumpToImage(imageNumber); +} + +/*! \reimp */ +bool QMngHandler::jumpToNextImage() +{ + Q_D(QMngHandler); + return d->jumpToNextImage(); +} + +/*! \reimp */ +int QMngHandler::loopCount() const +{ + Q_D(const QMngHandler); + if (d->iterCount == 0x7FFFFFFF) + return -1; // infinite loop + return d->iterCount-1; +} + +/*! \reimp */ +int QMngHandler::nextImageDelay() const +{ + Q_D(const QMngHandler); + return d->nextImageDelay(); +} + +/*! \reimp */ +QVariant QMngHandler::option(ImageOption option) const +{ + Q_D(const QMngHandler); + if (option == QImageIOHandler::Animation) + return true; + else if (option == QImageIOHandler::BackgroundColor) + return d->backgroundColor(); + return QVariant(); +} + +/*! \reimp */ +void QMngHandler::setOption(ImageOption option, const QVariant & value) +{ + Q_D(QMngHandler); + if (option == QImageIOHandler::BackgroundColor) + d->setBackgroundColor(qVariantValue<QColor>(value)); +} + +/*! \reimp */ +bool QMngHandler::supportsOption(ImageOption option) const +{ + if (option == QImageIOHandler::Animation) + return true; + else if (option == QImageIOHandler::BackgroundColor) + return true; + return false; +} + +QT_END_NAMESPACE |