Merge branch '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-1 into 4.7-integration

* '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-1:
  Consolidate zlib configuration redundancy
  Fixed whitespace formatting
  Fix incomplete support for built-in jpeg, mng, tiff and gif handlers
  Split image handler plugin project files
  No explicit link to zlib/jpeg for system mng/tiff
  Removed stray line continuations
  Long live else!
  qdoc: Added a solution for creating tables of contents for manuals.
  Doc: Fixed markup.
  Fixed size hint for combo box on windows

16 files changed, 3763 insertions, 46 deletions

diff --git a/src/gui/image/image.pri b/src/gui/image/image.pri
index f5f1bc0..9f0c87e 100644
--- a/src/gui/image/image.pri
+++ b/src/gui/image/image.pri
@@ -28,8 +28,7 @@ HEADERS += \
         image/qpixmapdata_p.h \
         image/qpixmapdatafactory_p.h \
         image/qpixmapfilter_p.h \
-        image/qimagepixmapcleanuphooks_p.h \
-
+        image/qimagepixmapcleanuphooks_p.h
 
 SOURCES += \
         image/qbitmap.cpp \
@@ -52,24 +51,23 @@ SOURCES += \
         image/qmovie.cpp \
         image/qpixmap_raster.cpp \
         image/qnativeimage.cpp \
-        image/qimagepixmapcleanuphooks.cpp \
-
+        image/qimagepixmapcleanuphooks.cpp
 
 win32 {
     SOURCES += image/qpixmap_win.cpp
 }
-embedded {
+else:embedded {
     SOURCES += image/qpixmap_qws.cpp
 }
-x11 {
+else:x11 {
     HEADERS += image/qpixmap_x11_p.h
     SOURCES += image/qpixmap_x11.cpp
 }
-mac {
+else:mac {
     HEADERS += image/qpixmap_mac_p.h
     SOURCES += image/qpixmap_mac.cpp
 }
-symbian {
+else:symbian {
     HEADERS += image/qpixmap_s60_p.h
     SOURCES += image/qpixmap_s60.cpp
 }
@@ -87,42 +85,10 @@ SOURCES += \
         image/qxbmhandler.cpp \
         image/qxpmhandler.cpp
 
-# 3rd party / system PNG support
-!contains(QT_CONFIG, no-png) {
-    HEADERS += image/qpnghandler_p.h
-    SOURCES += image/qpnghandler.cpp
+!contains(QT_CONFIG, no-png):include($$PWD/qpnghandler.pri)
+else:DEFINES *= QT_NO_IMAGEFORMAT_PNG
 
-    contains(QT_CONFIG, system-png) {
-        unix|win32-g++*:LIBS_PRIVATE  += -lpng
-        win32:!win32-g++*:LIBS += libpng.lib
-    } else {
-        DEFINES *= QT_USE_BUNDLED_LIBPNG
-        !isEqual(QT_ARCH, i386):!isEqual(QT_ARCH, x86_64):DEFINES += PNG_NO_ASSEMBLER_CODE
-        INCLUDEPATH += ../3rdparty/libpng
-        SOURCES += ../3rdparty/libpng/png.c \
-          ../3rdparty/libpng/pngerror.c \
-          ../3rdparty/libpng/pngget.c \
-          ../3rdparty/libpng/pngmem.c \
-          ../3rdparty/libpng/pngpread.c \
-          ../3rdparty/libpng/pngread.c \
-          ../3rdparty/libpng/pngrio.c \
-          ../3rdparty/libpng/pngrtran.c \
-          ../3rdparty/libpng/pngrutil.c \
-          ../3rdparty/libpng/pngset.c \
-          ../3rdparty/libpng/pngtrans.c \
-          ../3rdparty/libpng/pngwio.c \
-          ../3rdparty/libpng/pngwrite.c \
-          ../3rdparty/libpng/pngwtran.c \
-          ../3rdparty/libpng/pngwutil.c
-
-        contains(QT_CONFIG, system-zlib) {
-            symbian:LIBS_PRIVATE += -llibz
-            else:if(unix|win32-g++*):LIBS_PRIVATE += -lz
-            else:LIBS += zdll.lib
-        } else {
-            INCLUDEPATH  += ../3rdparty/zlib
-        }
-    }
-} else {
-    DEFINES *= QT_NO_IMAGEFORMAT_PNG
-}
+contains(QT_CONFIG, jpeg):include($$PWD/qjpeghandler.pri)
+contains(QT_CONFIG, mng):include($$PWD/qmnghandler.pri)
+contains(QT_CONFIG, tiff):include($$PWD/qtiffhandler.pri)
+contains(QT_CONFIG, gif):include($$PWD/qgifhandler.pri)
diff --git a/src/gui/image/qgifhandler.cpp b/src/gui/image/qgifhandler.cpp
new file mode 100644
index 0000000..129a11b
--- /dev/null
+++ b/src/gui/image/qgifhandler.cpp
@@ -0,0 +1,1199 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+** WARNING:
+**      A separate license from Unisys may be required to use the gif
+**      reader. See http://www.unisys.com/about__unisys/lzw/
+**      for information from Unisys
+**
+****************************************************************************/
+
+#include "qgifhandler.h"
+
+#include <qimage.h>
+#include <qiodevice.h>
+#include <qvariant.h>
+
+QT_BEGIN_NAMESPACE
+
+#define Q_TRANSPARENT 0x00ffffff
+
+// avoid going through QImage::scanLine() which calls detach
+#define FAST_SCAN_LINE(bits, bpl, y) (bits + (y) * bpl)
+
+
+/*
+  Incremental image decoder for GIF image format.
+
+  This subclass of QImageFormat decodes GIF format images,
+  including animated GIFs. Internally in
+*/
+
+class QGIFFormat {
+public:
+    QGIFFormat();
+    ~QGIFFormat();
+
+    int decode(QImage *image, const uchar* buffer, int length,
+               int *nextFrameDelay, int *loopCount);
+    static void scan(QIODevice *device, QVector<QSize> *imageSizes, int *loopCount);
+
+    bool newFrame;
+    bool partialNewFrame;
+
+private:
+    void fillRect(QImage *image, int x, int y, int w, int h, QRgb col);
+    inline QRgb color(uchar index) const;
+
+    // GIF specific stuff
+    QRgb* globalcmap;
+    QRgb* localcmap;
+    QImage backingstore;
+    unsigned char hold[16];
+    bool gif89;
+    int count;
+    int ccount;
+    int expectcount;
+    enum State {
+        Header,
+        LogicalScreenDescriptor,
+        GlobalColorMap,
+        LocalColorMap,
+        Introducer,
+        ImageDescriptor,
+        TableImageLZWSize,
+        ImageDataBlockSize,
+        ImageDataBlock,
+        ExtensionLabel,
+        GraphicControlExtension,
+        ApplicationExtension,
+        NetscapeExtensionBlockSize,
+        NetscapeExtensionBlock,
+        SkipBlockSize,
+        SkipBlock,
+        Done,
+        Error
+    } state;
+    int gncols;
+    int lncols;
+    int ncols;
+    int lzwsize;
+    bool lcmap;
+    int swidth, sheight;
+    int width, height;
+    int left, top, right, bottom;
+    enum Disposal { NoDisposal, DoNotChange, RestoreBackground, RestoreImage };
+    Disposal disposal;
+    bool disposed;
+    int trans_index;
+    bool gcmap;
+    int bgcol;
+    int interlace;
+    int accum;
+    int bitcount;
+
+    enum { max_lzw_bits=12 }; // (poor-compiler's static const int)
+
+    int code_size, clear_code, end_code, max_code_size, max_code;
+    int firstcode, oldcode, incode;
+    short* table[2];
+    short* stack;
+    short *sp;
+    bool needfirst;
+    int x, y;
+    int frame;
+    bool out_of_bounds;
+    bool digress;
+    void nextY(unsigned char *bits, int bpl);
+    void disposePrevious(QImage *image);
+};
+
+/*!
+    Constructs a QGIFFormat.
+*/
+QGIFFormat::QGIFFormat()
+{
+    globalcmap = 0;
+    localcmap = 0;
+    lncols = 0;
+    gncols = 0;
+    disposal = NoDisposal;
+    out_of_bounds = false;
+    disposed = true;
+    frame = -1;
+    state = Header;
+    count = 0;
+    lcmap = false;
+    newFrame = false;
+    partialNewFrame = false;
+    table[0] = 0;
+    table[1] = 0;
+    stack = 0;
+}
+
+/*!
+    Destroys a QGIFFormat.
+*/
+QGIFFormat::~QGIFFormat()
+{
+    if (globalcmap) delete[] globalcmap;
+    if (localcmap) delete[] localcmap;
+    delete [] stack;
+}
+
+void QGIFFormat::disposePrevious(QImage *image)
+{
+    if (out_of_bounds) {
+        // flush anything that survived
+        // ### Changed: QRect(0, 0, swidth, sheight)
+    }
+
+    // Handle disposal of previous image before processing next one
+
+    if (disposed) return;
+
+    int l = qMin(swidth-1,left);
+    int r = qMin(swidth-1,right);
+    int t = qMin(sheight-1,top);
+    int b = qMin(sheight-1,bottom);
+
+    switch (disposal) {
+      case NoDisposal:
+        break;
+      case DoNotChange:
+        break;
+      case RestoreBackground:
+        if (trans_index>=0) {
+            // Easy:  we use the transparent color
+            fillRect(image, l, t, r-l+1, b-t+1, Q_TRANSPARENT);
+        } else if (bgcol>=0) {
+            // Easy:  we use the bgcol given
+            fillRect(image, l, t, r-l+1, b-t+1, color(bgcol));
+        } else {
+            // Impossible:  We don't know of a bgcol - use pixel 0
+            QRgb *bits = (QRgb*)image->bits();
+            fillRect(image, l, t, r-l+1, b-t+1, bits[0]);
+        }
+        // ### Changed: QRect(l, t, r-l+1, b-t+1)
+        break;
+      case RestoreImage: {
+        if (frame >= 0) {
+            for (int ln=t; ln<=b; ln++) {
+                memcpy(image->scanLine(ln)+l,
+                    backingstore.scanLine(ln-t),
+                    (r-l+1)*sizeof(QRgb));
+            }
+            // ### Changed: QRect(l, t, r-l+1, b-t+1)
+        }
+      }
+    }
+    disposal = NoDisposal; // Until an extension says otherwise.
+
+    disposed = true;
+}
+
+/*!
+    This function decodes some data into image changes.
+
+    Returns the number of bytes consumed.
+*/
+int QGIFFormat::decode(QImage *image, const uchar *buffer, int length,
+                       int *nextFrameDelay, int *loopCount)
+{
+    // We are required to state that
+    //    "The Graphics Interchange Format(c) is the Copyright property of
+    //    CompuServe Incorporated. GIF(sm) is a Service Mark property of
+    //    CompuServe Incorporated."
+
+    if (!stack) {
+        stack = new short[(1 << max_lzw_bits) * 4];
+        table[0] = &stack[(1 << max_lzw_bits) * 2];
+        table[1] = &stack[(1 << max_lzw_bits) * 3];
+    }
+
+    image->detach();
+    int bpl = image->bytesPerLine();
+    unsigned char *bits = image->bits();
+
+#define LM(l, m) (((m)<<8)|l)
+    digress = false;
+    const int initial = length;
+    while (!digress && length) {
+        length--;
+        unsigned char ch=*buffer++;
+        switch (state) {
+          case Header:
+            hold[count++]=ch;
+            if (count==6) {
+                // Header
+                gif89=(hold[3]!='8' || hold[4]!='7');
+                state=LogicalScreenDescriptor;
+                count=0;
+            }
+            break;
+          case LogicalScreenDescriptor:
+            hold[count++]=ch;
+            if (count==7) {
+                // Logical Screen Descriptor
+                swidth=LM(hold[0], hold[1]);
+                sheight=LM(hold[2], hold[3]);
+                gcmap=!!(hold[4]&0x80);
+                //UNUSED: bpchan=(((hold[4]&0x70)>>3)+1);
+                //UNUSED: gcmsortflag=!!(hold[4]&0x08);
+                gncols=2<<(hold[4]&0x7);
+                bgcol=(gcmap) ? hold[5] : -1;
+                //aspect=hold[6] ? double(hold[6]+15)/64.0 : 1.0;
+
+                trans_index = -1;
+                count=0;
+                ncols=gncols;
+                if (gcmap) {
+                    ccount=0;
+                    state=GlobalColorMap;
+                    globalcmap = new QRgb[gncols+1]; // +1 for trans_index
+                    globalcmap[gncols] = Q_TRANSPARENT;
+                } else {
+                    state=Introducer;
+                }
+            }
+            break;
+          case GlobalColorMap: case LocalColorMap:
+            hold[count++]=ch;
+            if (count==3) {
+                QRgb rgb = qRgb(hold[0], hold[1], hold[2]);
+                if (state == LocalColorMap) {
+                    if (ccount < lncols)
+                        localcmap[ccount] =  rgb;
+                } else {
+                    globalcmap[ccount] = rgb;
+                }
+                if (++ccount >= ncols) {
+                    if (state == LocalColorMap)
+                        state=TableImageLZWSize;
+                    else
+                        state=Introducer;
+                }
+                count=0;
+            }
+            break;
+          case Introducer:
+            hold[count++]=ch;
+            switch (ch) {
+              case ',':
+                state=ImageDescriptor;
+                break;
+              case '!':
+                state=ExtensionLabel;
+                break;
+              case ';':
+                  // ### Changed: QRect(0, 0, swidth, sheight)
+                state=Done;
+                break;
+              default:
+                digress=true;
+                // Unexpected Introducer - ignore block
+                state=Error;
+            }
+            break;
+          case ImageDescriptor:
+            hold[count++]=ch;
+            if (count==10) {
+                int newleft=LM(hold[1], hold[2]);
+                int newtop=LM(hold[3], hold[4]);
+                int newwidth=LM(hold[5], hold[6]);
+                int newheight=LM(hold[7], hold[8]);
+
+                // disbelieve ridiculous logical screen sizes,
+                // unless the image frames are also large.
+                if (swidth/10 > qMax(newwidth,200))
+                    swidth = -1;
+                if (sheight/10 > qMax(newheight,200))
+                    sheight = -1;
+
+                if (swidth <= 0)
+                    swidth = newleft + newwidth;
+                if (sheight <= 0)
+                    sheight = newtop + newheight;
+
+                QImage::Format format = trans_index >= 0 ? QImage::Format_ARGB32 : QImage::Format_RGB32;
+                if (image->isNull()) {
+                    (*image) = QImage(swidth, sheight, format);
+                    bpl = image->bytesPerLine();
+                    bits = image->bits();
+                    memset(bits, 0, image->byteCount());
+                }
+
+                disposePrevious(image);
+                disposed = false;
+
+                left = newleft;
+                top = newtop;
+                width = newwidth;
+                height = newheight;
+
+                right=qMax(0, qMin(left+width, swidth)-1);
+                bottom=qMax(0, qMin(top+height, sheight)-1);
+                lcmap=!!(hold[9]&0x80);
+                interlace=!!(hold[9]&0x40);
+                //bool lcmsortflag=!!(hold[9]&0x20);
+                lncols=lcmap ? (2<<(hold[9]&0x7)) : 0;
+                if (lncols) {
+                    if (localcmap)
+                        delete [] localcmap;
+                    localcmap = new QRgb[lncols+1];
+                    localcmap[lncols] = Q_TRANSPARENT;
+                    ncols = lncols;
+                } else {
+                    ncols = gncols;
+                }
+                frame++;
+                if (frame == 0) {
+                    if (left || top || width<swidth || height<sheight) {
+                        // Not full-size image - erase with bg or transparent
+                        if (trans_index >= 0) {
+                            fillRect(image, 0, 0, swidth, sheight, color(trans_index));
+                            // ### Changed: QRect(0, 0, swidth, sheight)
+                        } else if (bgcol>=0) {
+                            fillRect(image, 0, 0, swidth, sheight, color(bgcol));
+                            // ### Changed: QRect(0, 0, swidth, sheight)
+                        }
+                    }
+                }
+
+                if (disposal == RestoreImage) {
+                    int l = qMin(swidth-1,left);
+                    int r = qMin(swidth-1,right);
+                    int t = qMin(sheight-1,top);
+                    int b = qMin(sheight-1,bottom);
+                    int w = r-l+1;
+                    int h = b-t+1;
+
+                    if (backingstore.width() < w
+                        || backingstore.height() < h) {
+                        // We just use the backing store as a byte array
+                        backingstore = QImage(qMax(backingstore.width(), w),
+                                              qMax(backingstore.height(), h),
+                                              QImage::Format_RGB32);
+                        memset(bits, 0, image->byteCount());
+                    }
+                    const int dest_bpl = backingstore.bytesPerLine();
+                    unsigned char *dest_data = backingstore.bits();
+                    for (int ln=0; ln<h; ln++) {
+                        memcpy(FAST_SCAN_LINE(dest_data, dest_bpl, ln),
+                               FAST_SCAN_LINE(bits, bpl, t+ln) + l, w*sizeof(QRgb));
+                    }
+                }
+
+                count=0;
+                if (lcmap) {
+                    ccount=0;
+                    state=LocalColorMap;
+                } else {
+                    state=TableImageLZWSize;
+                }
+                x = left;
+                y = top;
+                accum = 0;
+                bitcount = 0;
+                sp = stack;
+                firstcode = oldcode = 0;
+                needfirst = true;
+                out_of_bounds = left>=swidth || y>=sheight;
+            }
+            break;
+          case TableImageLZWSize: {
+            lzwsize=ch;
+            if (lzwsize > max_lzw_bits) {
+                state=Error;
+            } else {
+                code_size=lzwsize+1;
+                clear_code=1<<lzwsize;
+                end_code=clear_code+1;
+                max_code_size=2*clear_code;
+                max_code=clear_code+2;
+                int i;
+                for (i=0; i<clear_code; i++) {
+                    table[0][i]=0;
+                    table[1][i]=i;
+                }
+                state=ImageDataBlockSize;
+            }
+            count=0;
+            break;
+          } case ImageDataBlockSize:
+            expectcount=ch;
+            if (expectcount) {
+                state=ImageDataBlock;
+            } else {
+                state=Introducer;
+                digress = true;
+                newFrame = true;
+            }
+            break;
+          case ImageDataBlock:
+            count++;
+            accum|=(ch<<bitcount);
+            bitcount+=8;
+            while (bitcount>=code_size && state==ImageDataBlock) {
+                int code=accum&((1<<code_size)-1);
+                bitcount-=code_size;
+                accum>>=code_size;
+
+                if (code==clear_code) {
+                    if (!needfirst) {
+                        code_size=lzwsize+1;
+                        max_code_size=2*clear_code;
+                        max_code=clear_code+2;
+                    }
+                    needfirst=true;
+                } else if (code==end_code) {
+                    bitcount = -32768;
+                    // Left the block end arrive
+                } else {
+                    if (needfirst) {
+                        firstcode=oldcode=code;
+                        if (!out_of_bounds && image->height() > y && firstcode!=trans_index)
+                            ((QRgb*)FAST_SCAN_LINE(bits, bpl, y))[x] = color(firstcode);
+                        x++;
+                        if (x>=swidth) out_of_bounds = true;
+                        needfirst=false;
+                        if (x>=left+width) {
+                            x=left;
+                            out_of_bounds = left>=swidth || y>=sheight;
+                            nextY(bits, bpl);
+                        }
+                    } else {
+                        incode=code;
+                        if (code>=max_code) {
+                            *sp++=firstcode;
+                            code=oldcode;
+                        }
+                        while (code>=clear_code+2) {
+                            *sp++=table[1][code];
+                            if (code==table[0][code]) {
+                                state=Error;
+                                break;
+                            }
+                            if (sp-stack>=(1<<(max_lzw_bits))*2) {
+                                state=Error;
+                                break;
+                            }
+                            code=table[0][code];
+                        }
+                        *sp++=firstcode=table[1][code];
+                        code=max_code;
+                        if (code<(1<<max_lzw_bits)) {
+                            table[0][code]=oldcode;
+                            table[1][code]=firstcode;
+                            max_code++;
+                            if ((max_code>=max_code_size)
+                             && (max_code_size<(1<<max_lzw_bits)))
+                            {
+                                max_code_size*=2;
+                                code_size++;
+                            }
+                        }
+                        oldcode=incode;
+                        const int h = image->height();
+                        const QRgb *map = lcmap ? localcmap : globalcmap;
+                        QRgb *line = 0;
+                        if (!out_of_bounds && h > y)
+                            line = (QRgb*)FAST_SCAN_LINE(bits, bpl, y);
+                        while (sp>stack) {
+                            const uchar index = *(--sp);
+                            if (!out_of_bounds && h > y && index!=trans_index) {
+                                if (index > ncols)
+                                    line[x] = Q_TRANSPARENT;
+                                else
+                                    line[x] = map ? map[index] : 0;
+                            }
+                            x++;
+                            if (x>=swidth) out_of_bounds = true;
+                            if (x>=left+width) {
+                                x=left;
+                                out_of_bounds = left>=swidth || y>=sheight;
+                                nextY(bits, bpl);
+                                if (!out_of_bounds && h > y)
+                                    line = (QRgb*)FAST_SCAN_LINE(bits, bpl, y);
+                            }
+                        }
+                    }
+                }
+            }
+            partialNewFrame = true;
+            if (count==expectcount) {
+                count=0;
+                state=ImageDataBlockSize;
+            }
+            break;
+          case ExtensionLabel:
+            switch (ch) {
+            case 0xf9:
+                state=GraphicControlExtension;
+                break;
+            case 0xff:
+                state=ApplicationExtension;
+                break;
+#if 0
+            case 0xfe:
+                state=CommentExtension;
+                break;
+            case 0x01:
+                break;
+#endif
+            default:
+                state=SkipBlockSize;
+            }
+            count=0;
+            break;
+          case ApplicationExtension:
+            if (count<11) hold[count]=ch;
+            count++;
+            if (count==hold[0]+1) {
+                if (qstrncmp((char*)(hold+1), "NETSCAPE", 8)==0) {
+                    // Looping extension
+                    state=NetscapeExtensionBlockSize;
+                } else {
+                    state=SkipBlockSize;
+                }
+                count=0;
+            }
+            break;
+          case NetscapeExtensionBlockSize:
+            expectcount=ch;
+            count=0;
+            if (expectcount) state=NetscapeExtensionBlock;
+            else state=Introducer;
+            break;
+          case NetscapeExtensionBlock:
+            if (count<3) hold[count]=ch;
+            count++;
+            if (count==expectcount) {
+                *loopCount = hold[1]+hold[2]*256;
+                state=SkipBlockSize; // Ignore further blocks
+            }
+            break;
+          case GraphicControlExtension:
+            if (count<5) hold[count]=ch;
+            count++;
+            if (count==hold[0]+1) {
+                disposePrevious(image);
+                disposal=Disposal((hold[1]>>2)&0x7);
+                //UNUSED: waitforuser=!!((hold[1]>>1)&0x1);
+                int delay=count>3 ? LM(hold[2], hold[3]) : 1;
+                // IE and mozilla use a minimum delay of 10. With the minimum delay of 10
+                // we are compatible to them and avoid huge loads on the app and xserver.
+                *nextFrameDelay = (delay < 2 ? 10 : delay) * 10;
+
+                bool havetrans=hold[1]&0x1;
+                trans_index = havetrans ? hold[4] : -1;
+
+                count=0;
+                state=SkipBlockSize;
+            }
+            break;
+          case SkipBlockSize:
+            expectcount=ch;
+            count=0;
+            if (expectcount) state=SkipBlock;
+            else state=Introducer;
+            break;
+          case SkipBlock:
+            count++;
+            if (count==expectcount) state=SkipBlockSize;
+            break;
+          case Done:
+            digress=true;
+            /* Netscape ignores the junk, so we do too.
+            length++; // Unget
+            state=Error; // More calls to this is an error
+            */
+            break;
+          case Error:
+            return -1; // Called again after done.
+        }
+    }
+    return initial-length;
+}
+
+/*!
+   Scans through the data stream defined by \a device and returns the image
+   sizes found in the stream in the \a imageSizes vector.
+*/
+void QGIFFormat::scan(QIODevice *device, QVector<QSize> *imageSizes, int *loopCount)
+{
+    if (!device)
+        return;
+
+    qint64 oldPos = device->pos();
+    if (!device->seek(0))
+        return;
+
+    int colorCount = 0;
+    int localColorCount = 0;
+    int globalColorCount = 0;
+    int colorReadCount = 0;
+    bool localColormap = false;
+    bool globalColormap = false;
+    int count = 0;
+    int blockSize = 0;
+    int imageWidth = 0;
+    int imageHeight = 0;
+    bool done = false;
+    uchar hold[16];
+    State state = Header;
+
+    const int readBufferSize = 40960; // 40k read buffer
+    QByteArray readBuffer(device->read(readBufferSize));
+
+    if (readBuffer.isEmpty()) {
+        device->seek(oldPos);
+        return;
+    }
+
+    // This is a specialized version of the state machine from decode(),
+    // which doesn't do any image decoding or mallocing, and has an
+    // optimized way of skipping SkipBlocks, ImageDataBlocks and
+    // Global/LocalColorMaps.
+
+    while (!readBuffer.isEmpty()) {
+        int length = readBuffer.size();
+        const uchar *buffer = (const uchar *) readBuffer.constData();
+        while (!done && length) {
+            length--;
+            uchar ch = *buffer++;
+            switch (state) {
+            case Header:
+                hold[count++] = ch;
+                if (count == 6) {
+                    state = LogicalScreenDescriptor;
+                    count = 0;
+                }
+                break;
+            case LogicalScreenDescriptor:
+                hold[count++] = ch;
+                if (count == 7) {
+                    imageWidth = LM(hold[0], hold[1]);
+                    imageHeight = LM(hold[2], hold[3]);
+                    globalColormap = !!(hold[4] & 0x80);
+                    globalColorCount = 2 << (hold[4] & 0x7);
+                    count = 0;
+                    colorCount = globalColorCount;
+                    if (globalColormap) {
+                        int colorTableSize = 3 * globalColorCount;
+                        if (length >= colorTableSize) {
+                            // skip the global color table in one go
+                            length -= colorTableSize;
+                            buffer += colorTableSize;
+                            state = Introducer;
+                        } else {
+                            colorReadCount = 0;
+                            state = GlobalColorMap;
+                        }
+                    } else {
+                        state=Introducer;
+                    }
+                }
+                break;
+            case GlobalColorMap:
+            case LocalColorMap:
+                hold[count++] = ch;
+                if (count == 3) {
+                    if (++colorReadCount >= colorCount) {
+                        if (state == LocalColorMap)
+                            state = TableImageLZWSize;
+                        else
+                            state = Introducer;
+                    }
+                    count = 0;
+                }
+                break;
+            case Introducer:
+                hold[count++] = ch;
+                switch (ch) {
+                case 0x2c:
+                    state = ImageDescriptor;
+                    break;
+                case 0x21:
+                    state = ExtensionLabel;
+                    break;
+                case 0x3b:
+                    state = Done;
+                    break;
+                default:
+                    done = true;
+                    state = Error;
+                }
+                break;
+            case ImageDescriptor:
+                hold[count++] = ch;
+                if (count == 10) {
+                    int newLeft = LM(hold[1], hold[2]);
+                    int newTop = LM(hold[3], hold[4]);
+                    int newWidth = LM(hold[5], hold[6]);
+                    int newHeight = LM(hold[7], hold[8]);
+
+                    if (imageWidth/10 > qMax(newWidth,200))
+                        imageWidth = -1;
+                    if (imageHeight/10 > qMax(newHeight,200))
+                        imageHeight = -1;
+
+                    if (imageWidth <= 0)
+                        imageWidth = newLeft + newWidth;
+                    if (imageHeight <= 0)
+                        imageHeight = newTop + newHeight;
+
+                    *imageSizes << QSize(imageWidth, imageHeight);
+
+                    localColormap = !!(hold[9] & 0x80);
+                    localColorCount = localColormap ? (2 << (hold[9] & 0x7)) : 0;
+                    if (localColorCount)
+                        colorCount = localColorCount;
+                    else
+                        colorCount = globalColorCount;
+
+                    count = 0;
+                    if (localColormap) {
+                        int colorTableSize = 3 * localColorCount;
+                        if (length >= colorTableSize) {
+                            // skip the local color table in one go
+                            length -= colorTableSize;
+                            buffer += colorTableSize;
+                            state = TableImageLZWSize;
+                        } else {
+                            colorReadCount = 0;
+                            state = LocalColorMap;
+                        }
+                    } else {
+                        state = TableImageLZWSize;
+                    }
+                }
+                break;
+            case TableImageLZWSize:
+                if (ch > max_lzw_bits)
+                    state = Error;
+                else
+                    state = ImageDataBlockSize;
+                count = 0;
+                break;
+            case ImageDataBlockSize:
+                blockSize = ch;
+                if (blockSize) {
+                    if (length >= blockSize) {
+                        // we can skip the block in one go
+                        length -= blockSize;
+                        buffer += blockSize;
+                        count = 0;
+                    } else {
+                        state = ImageDataBlock;
+                    }
+                } else {
+                    state = Introducer;
+                }
+                break;
+            case ImageDataBlock:
+                ++count;
+                if (count == blockSize) {
+                    count = 0;
+                    state = ImageDataBlockSize;
+                }
+                break;
+            case ExtensionLabel:
+                switch (ch) {
+                case 0xf9:
+                    state = GraphicControlExtension;
+                    break;
+                case 0xff:
+                    state = ApplicationExtension;
+                    break;
+                default:
+                    state = SkipBlockSize;
+                }
+                count = 0;
+                break;
+            case ApplicationExtension:
+                if (count < 11)
+                    hold[count] = ch;
+                ++count;
+                if (count == hold[0] + 1) {
+                    if (qstrncmp((char*)(hold+1), "NETSCAPE", 8) == 0)
+                        state=NetscapeExtensionBlockSize;
+                    else
+                        state=SkipBlockSize;
+                    count = 0;
+                }
+                break;
+            case GraphicControlExtension:
+                if (count < 5)
+                    hold[count] = ch;
+                ++count;
+                if (count == hold[0] + 1) {
+                    count = 0;
+                    state = SkipBlockSize;
+                }
+                break;
+            case NetscapeExtensionBlockSize:
+                blockSize = ch;
+                count = 0;
+                if (blockSize)
+                    state = NetscapeExtensionBlock;
+                else
+                    state = Introducer;
+                break;
+            case NetscapeExtensionBlock:
+                if (count < 3)
+                    hold[count] = ch;
+                count++;
+                if (count == blockSize) {
+                    *loopCount = LM(hold[1], hold[2]);
+                    state = SkipBlockSize;
+                }
+                break;
+            case SkipBlockSize:
+                blockSize = ch;
+                count = 0;
+                if (blockSize) {
+                    if (length >= blockSize) {
+                        // we can skip the block in one go
+                        length -= blockSize;
+                        buffer += blockSize;
+                    } else {
+                        state = SkipBlock;
+                    }
+                } else {
+                    state = Introducer;
+                }
+                break;
+            case SkipBlock:
+                ++count;
+                if (count == blockSize)
+                    state = SkipBlockSize;
+                break;
+            case Done:
+                done = true;
+                break;
+            case Error:
+                device->seek(oldPos);
+                return;
+            }
+        }
+        readBuffer = device->read(readBufferSize);
+    }
+    device->seek(oldPos);
+    return;
+}
+
+void QGIFFormat::fillRect(QImage *image, int col, int row, int w, int h, QRgb color)
+{
+    if (w>0) {
+        for (int j=0; j<h; j++) {
+            QRgb *line = (QRgb*)image->scanLine(j+row);
+            for (int i=0; i<w; i++)
+                *(line+col+i) = color;
+        }
+    }
+}
+
+void QGIFFormat::nextY(unsigned char *bits, int bpl)
+{
+    int my;
+    switch (interlace) {
+    case 0: // Non-interlaced
+        // if (!out_of_bounds) {
+        //     ### Changed: QRect(left, y, right - left + 1, 1);
+        // }
+        y++;
+        break;
+    case 1: {
+        int i;
+        my = qMin(7, bottom-y);
+        // Don't dup with transparency
+        if (trans_index < 0) {
+            for (i=1; i<=my; i++) {
+                memcpy(FAST_SCAN_LINE(bits, bpl, y+i)+left*sizeof(QRgb), FAST_SCAN_LINE(bits, bpl, y)+left*sizeof(QRgb),
+                       (right-left+1)*sizeof(QRgb));
+            }
+        }
+
+        // if (!out_of_bounds) {
+        //     ### Changed: QRect(left, y, right - left + 1, my + 1);
+        // }
+//        if (!out_of_bounds)
+//            qDebug("consumer->changed(QRect(%d, %d, %d, %d))", left, y, right-left+1, my+1);
+        y+=8;
+        if (y>bottom) {
+            interlace++; y=top+4;
+            if (y > bottom) { // for really broken GIFs with bottom < 5
+                interlace=2;
+                y = top + 2;
+                if (y > bottom) { // for really broken GIF with bottom < 3
+                    interlace = 0;
+                    y = top + 1;
+                }
+            }
+        }
+    } break;
+    case 2: {
+        int i;
+        my = qMin(3, bottom-y);
+        // Don't dup with transparency
+        if (trans_index < 0) {
+            for (i=1; i<=my; i++) {
+                memcpy(FAST_SCAN_LINE(bits, bpl, y+i)+left*sizeof(QRgb), FAST_SCAN_LINE(bits, bpl, y)+left*sizeof(QRgb),
+                       (right-left+1)*sizeof(QRgb));
+            }
+        }
+
+        // if (!out_of_bounds) {
+        //     ### Changed: QRect(left, y, right - left + 1, my + 1);
+        // }
+        y+=8;
+        if (y>bottom) {
+            interlace++; y=top+2;
+            // handle broken GIF with bottom < 3
+            if (y > bottom) {
+                interlace = 3;
+                y = top + 1;
+            }
+        }
+    } break;
+    case 3: {
+        int i;
+        my = qMin(1, bottom-y);
+        // Don't dup with transparency
+        if (trans_index < 0) {
+            for (i=1; i<=my; i++) {
+                memcpy(FAST_SCAN_LINE(bits, bpl, y+i)+left*sizeof(QRgb), FAST_SCAN_LINE(bits, bpl, y)+left*sizeof(QRgb),
+                       (right-left+1)*sizeof(QRgb));
+            }
+        }
+        // if (!out_of_bounds) {
+        //     ### Changed: QRect(left, y, right - left + 1, my + 1);
+        // }
+        y+=4;
+        if (y>bottom) { interlace++; y=top+1; }
+    } break;
+    case 4:
+        // if (!out_of_bounds) {
+        //     ### Changed: QRect(left, y, right - left + 1, 1);
+        // }
+        y+=2;
+    }
+
+    // Consume bogus extra lines
+    if (y >= sheight) out_of_bounds=true; //y=bottom;
+}
+
+inline QRgb QGIFFormat::color(uchar index) const
+{
+    if (index == trans_index || index > ncols)
+        return Q_TRANSPARENT;
+
+    QRgb *map = lcmap ? localcmap : globalcmap;
+    return map ? map[index] : 0;
+}
+
+//-------------------------------------------------------------------------
+//-------------------------------------------------------------------------
+//-------------------------------------------------------------------------
+
+QGifHandler::QGifHandler()
+{
+    gifFormat = new QGIFFormat;
+    nextDelay = 100;
+    loopCnt = 1;
+    frameNumber = -1;
+    scanIsCached = false;
+}
+
+QGifHandler::~QGifHandler()
+{
+    delete gifFormat;
+}
+
+// Does partial decode if necessary, just to see if an image is coming
+
+bool QGifHandler::imageIsComing() const
+{
+    const int GifChunkSize = 4096;
+
+    while (!gifFormat->partialNewFrame) {
+        if (buffer.isEmpty()) {
+            buffer += device()->read(GifChunkSize);
+            if (buffer.isEmpty())
+                break;
+        }
+
+        int decoded = gifFormat->decode(&lastImage, (const uchar *)buffer.constData(), buffer.size(),
+                                        &nextDelay, &loopCnt);
+        if (decoded == -1)
+            break;
+        buffer.remove(0, decoded);
+    }
+    return gifFormat->partialNewFrame;
+}
+
+bool QGifHandler::canRead() const
+{
+    if (canRead(device()) || imageIsComing()) {
+        setFormat("gif");
+        return true;
+    }
+
+    return false;
+}
+
+bool QGifHandler::canRead(QIODevice *device)
+{
+    if (!device) {
+        qWarning("QGifHandler::canRead() called with no device");
+        return false;
+    }
+
+    char head[6];
+    if (device->peek(head, sizeof(head)) == sizeof(head))
+        return qstrncmp(head, "GIF87a", 6) == 0
+            || qstrncmp(head, "GIF89a", 6) == 0;
+    return false;
+}
+
+bool QGifHandler::read(QImage *image)
+{
+    const int GifChunkSize = 4096;
+
+    while (!gifFormat->newFrame) {
+        if (buffer.isEmpty()) {
+            buffer += device()->read(GifChunkSize);
+            if (buffer.isEmpty())
+                break;
+        }
+
+        int decoded = gifFormat->decode(&lastImage, (const uchar *)buffer.constData(), buffer.size(),
+                                        &nextDelay, &loopCnt);
+        if (decoded == -1)
+            break;
+        buffer.remove(0, decoded);
+    }
+    if (gifFormat->newFrame || (gifFormat->partialNewFrame && device()->atEnd())) {
+        *image = lastImage;
+        ++frameNumber;
+        gifFormat->newFrame = false;
+        gifFormat->partialNewFrame = false;
+        return true;
+    }
+
+    return false;
+}
+
+bool QGifHandler::write(const QImage &image)
+{
+    Q_UNUSED(image);
+    return false;
+}
+
+bool QGifHandler::supportsOption(ImageOption option) const
+{
+    if (!device() || device()->isSequential())
+        return option == Animation;
+    else
+        return option == Size
+            || option == Animation;
+}
+
+QVariant QGifHandler::option(ImageOption option) const
+{
+    if (option == Size) {
+        if (!scanIsCached) {
+            QGIFFormat::scan(device(), &imageSizes, &loopCnt);
+            scanIsCached = true;
+        }
+        // before the first frame is read, or we have an empty data stream
+        if (frameNumber == -1)
+            return (imageSizes.count() > 0) ? QVariant(imageSizes.at(0)) : QVariant();
+        // after the last frame has been read, the next size is undefined
+        if (frameNumber >= imageSizes.count() - 1)
+            return QVariant();
+        // and the last case: the size of the next frame
+        return imageSizes.at(frameNumber + 1);
+    } else if (option == Animation) {
+        return true;
+    }
+    return QVariant();
+}
+
+void QGifHandler::setOption(ImageOption option, const QVariant &value)
+{
+    Q_UNUSED(option);
+    Q_UNUSED(value);
+}
+
+int QGifHandler::nextImageDelay() const
+{
+    return nextDelay;
+}
+
+int QGifHandler::imageCount() const
+{
+    if (!scanIsCached) {
+        QGIFFormat::scan(device(), &imageSizes, &loopCnt);
+        scanIsCached = true;
+    }
+    return imageSizes.count();
+}
+
+int QGifHandler::loopCount() const
+{
+    if (!scanIsCached) {
+        QGIFFormat::scan(device(), &imageSizes, &loopCnt);
+        scanIsCached = true;
+    }
+    return loopCnt-1; // In GIF, loop count is iteration count, so subtract one
+}
+
+int QGifHandler::currentImageNumber() const
+{
+    return frameNumber;
+}
+
+QByteArray QGifHandler::name() const
+{
+    return "gif";
+}
+
+QT_END_NAMESPACE
diff --git a/src/gui/image/qgifhandler.h b/src/gui/image/qgifhandler.h
new file mode 100644
index 0000000..8e07aff
--- /dev/null
+++ b/src/gui/image/qgifhandler.h
@@ -0,0 +1,96 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+** WARNING:
+**      A separate license from Unisys may be required to use the gif
+**      reader. See http://www.unisys.com/about__unisys/lzw/
+**      for information from Unisys
+**
+****************************************************************************/
+
+#ifndef QGIFHANDLER_H
+#define QGIFHANDLER_H
+
+#include <QtGui/qimageiohandler.h>
+#include <QtGui/qimage.h>
+#include <QtCore/qbytearray.h>
+
+QT_BEGIN_NAMESPACE
+
+class QGIFFormat;
+class QGifHandler : public QImageIOHandler
+{
+public:
+    QGifHandler();
+    ~QGifHandler();
+
+    bool canRead() const;
+    bool read(QImage *image);
+    bool write(const QImage &image);
+
+    QByteArray name() const;
+
+    static bool canRead(QIODevice *device);
+
+    QVariant option(ImageOption option) const;
+    void setOption(ImageOption option, const QVariant &value);
+    bool supportsOption(ImageOption option) const;
+
+    int imageCount() const;
+    int loopCount() const;
+    int nextImageDelay() const;
+    int currentImageNumber() const;
+
+private:
+    bool imageIsComing() const;
+    QGIFFormat *gifFormat;
+    QString fileName;
+    mutable QByteArray buffer;
+    mutable QImage lastImage;
+
+    mutable int nextDelay;
+    mutable int loopCnt;
+    int frameNumber;
+    mutable QVector<QSize> imageSizes;
+    mutable bool scanIsCached;
+};
+
+QT_END_NAMESPACE
+
+#endif // QGIFHANDLER_H
diff --git a/src/gui/image/qgifhandler.pri b/src/gui/image/qgifhandler.pri
new file mode 100644
index 0000000..003476a
--- /dev/null
+++ b/src/gui/image/qgifhandler.pri
@@ -0,0 +1,4 @@
+# common to plugin and built-in forms
+INCLUDEPATH *= $$PWD
+HEADERS += $$PWD/qgifhandler.h
+SOURCES += $$PWD/qgifhandler.cpp
diff --git a/src/gui/image/qimagereader.cpp b/src/gui/image/qimagereader.cpp
index af43e90..55c9341 100644
--- a/src/gui/image/qimagereader.cpp
+++ b/src/gui/image/qimagereader.cpp
@@ -141,6 +141,18 @@
 #ifndef QT_NO_IMAGEFORMAT_PNG
 #include <private/qpnghandler_p.h>
 #endif
+#ifndef QT_NO_IMAGEFORMAT_JPEG
+#include <qjpeghandler.h>
+#endif
+#ifndef QT_NO_IMAGEFORMAT_MNG
+#include <qmnghandler.h>
+#endif
+#ifndef QT_NO_IMAGEFORMAT_TIFF
+#include <qtiffhandler.h>
+#endif
+#ifdef QT_BUILTIN_GIF_READER
+#include <qgifhandler.h>
+#endif
 
 QT_BEGIN_NAMESPACE
 
@@ -153,6 +165,18 @@ enum _qt_BuiltInFormatType {
 #ifndef QT_NO_IMAGEFORMAT_PNG
     _qt_PngFormat,
 #endif
+#ifndef QT_NO_IMAGEFORMAT_JPEG
+    _qt_JpgFormat,
+#endif
+#ifndef QT_NO_IMAGEFORMAT_MNG
+    _qt_MngFormat,
+#endif
+#ifndef QT_NO_IMAGEFORMAT_TIFF
+    _qt_TifFormat,
+#endif
+#ifdef QT_BUILTIN_GIF_READER
+    _qt_GifFormat,
+#endif
     _qt_BmpFormat,
 #ifndef QT_NO_IMAGEFORMAT_PPM
     _qt_PpmFormat,
@@ -179,6 +203,18 @@ static const _qt_BuiltInFormatStruct _qt_BuiltInFormats[] = {
 #ifndef QT_NO_IMAGEFORMAT_PNG
     {_qt_PngFormat, "png"},
 #endif
+#ifndef QT_NO_IMAGEFORMAT_JPEG
+    {_qt_JpgFormat, "jpg"},
+#endif
+#ifndef QT_NO_IMAGEFORMAT_MNG
+    {_qt_MngFormat, "mng"},
+#endif
+#ifndef QT_NO_IMAGEFORMAT_TIFF
+    {_qt_TifFormat, "tif"},
+#endif
+#ifdef QT_BUILTIN_GIF_READER
+    {_qt_GifFormat, "gif"},
+#endif
     {_qt_BmpFormat, "bmp"},
 #ifndef QT_NO_IMAGEFORMAT_PPM
     {_qt_PpmFormat, "ppm"},
@@ -304,6 +340,22 @@ static QImageIOHandler *createReadHandlerHelper(QIODevice *device,
         } else if (testFormat == "png") {
             handler = new QPngHandler;
 #endif
+#ifndef QT_NO_IMAGEFORMAT_JPEG
+        } else if (testFormat == "jpg" || testFormat == "jpeg") {
+            handler = new QJpegHandler;
+#endif
+#ifndef QT_NO_IMAGEFORMAT_MNG
+        } else if (testFormat == "mng") {
+            handler = new QMngHandler;
+#endif
+#ifndef QT_NO_IMAGEFORMAT_TIFF
+        } else if (testFormat == "tif" || testFormat == "tiff") {
+            handler = new QTiffHandler;
+#endif
+#ifdef QT_BUILTIN_GIF_READER
+        } else if (testFormat == "gif") {
+            handler = new QGifHandler;
+#endif
 #ifndef QT_NO_IMAGEFORMAT_BMP
         } else if (testFormat == "bmp") {
             handler = new QBmpHandler;
@@ -380,6 +432,30 @@ static QImageIOHandler *createReadHandlerHelper(QIODevice *device,
                     handler = new QPngHandler;
                 break;
 #endif
+#ifndef QT_NO_IMAGEFORMAT_JPEG
+            case _qt_JpgFormat:
+                if (QJpegHandler::canRead(device))
+                    handler = new QJpegHandler;
+                break;
+#endif
+#ifndef QT_NO_IMAGEFORMAT_MNG
+            case _qt_MngFormat:
+                if (QMngHandler::canRead(device))
+                    handler = new QMngHandler;
+                break;
+#endif
+#ifndef QT_NO_IMAGEFORMAT_TIFF
+            case _qt_TifFormat:
+                if (QTiffHandler::canRead(device))
+                    handler = new QTiffHandler;
+                break;
+#endif
+#ifdef QT_BUILTIN_GIF_READER
+            case _qt_GifFormat:
+                if (QGifHandler::canRead(device))
+                    handler = new QGifHandler;
+                break;
+#endif
 #ifndef QT_NO_IMAGEFORMAT_BMP
             case _qt_BmpFormat:
                 if (QBmpHandler::canRead(device))
diff --git a/src/gui/image/qimagewriter.cpp b/src/gui/image/qimagewriter.cpp
index 552729f..a46fc48 100644
--- a/src/gui/image/qimagewriter.cpp
+++ b/src/gui/image/qimagewriter.cpp
@@ -114,6 +114,18 @@
 #ifndef QT_NO_IMAGEFORMAT_PNG
 #include <private/qpnghandler_p.h>
 #endif
+#ifndef QT_NO_IMAGEFORMAT_JPEG
+#include <qjpeghandler.h>
+#endif
+#ifndef QT_NO_IMAGEFORMAT_MNG
+#include <qmnghandler.h>
+#endif
+#ifndef QT_NO_IMAGEFORMAT_TIFF
+#include <qtiffhandler.h>
+#endif
+#ifdef QT_BUILTIN_GIF_READER
+#include <qgifhandler.h>
+#endif
 
 QT_BEGIN_NAMESPACE
 
@@ -170,6 +182,22 @@ static QImageIOHandler *createWriteHandlerHelper(QIODevice *device,
         } else if (testFormat == "png") {
             handler = new QPngHandler;
 #endif
+#ifndef QT_NO_IMAGEFORMAT_JPEG
+        } else if (testFormat == "jpg" || testFormat == "jpeg") {
+            handler = new QJpegHandler;
+#endif
+#ifndef QT_NO_IMAGEFORMAT_MNG
+        } else if (testFormat == "mng") {
+            handler = new QMngHandler;
+#endif
+#ifndef QT_NO_IMAGEFORMAT_TIFF
+        } else if (testFormat == "tif" || testFormat == "tiff") {
+            handler = new QTiffHandler;
+#endif
+#ifdef QT_BUILTIN_GIF_READER
+        } else if (testFormat == "gif") {
+            handler = new QGifHandler;
+#endif
 #ifndef QT_NO_IMAGEFORMAT_BMP
         } else if (testFormat == "bmp") {
             handler = new QBmpHandler;
@@ -669,6 +697,18 @@ QList<QByteArray> QImageWriter::supportedImageFormats()
 #ifndef QT_NO_IMAGEFORMAT_PNG
     formats << "png";
 #endif
+#ifndef QT_NO_IMAGEFORMAT_JPEG
+    formats << "jpg" << "jpeg";
+#endif
+#ifndef QT_NO_IMAGEFORMAT_MNG
+    formats << "mng";
+#endif
+#ifndef QT_NO_IMAGEFORMAT_TIFF
+    formats << "tif" << "tiff";
+#endif
+#ifdef QT_BUILTIN_GIF_READER
+    formats << "gif";
+#endif
 
 #ifndef QT_NO_LIBRARY
     QFactoryLoader *l = loader();
diff --git a/src/gui/image/qjpeghandler.cpp b/src/gui/image/qjpeghandler.cpp
new file mode 100644
index 0000000..60e7cce
--- /dev/null
+++ b/src/gui/image/qjpeghandler.cpp
@@ -0,0 +1,901 @@
+/****************************************************************************
+**
+** 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 "qjpeghandler.h"
+
+#include <qimage.h>
+#include <qvariant.h>
+#include <qvector.h>
+#include <qbuffer.h>
+
+#include <stdio.h>      // jpeglib needs this to be pre-included
+#include <setjmp.h>
+
+#ifdef FAR
+#undef FAR
+#endif
+
+// including jpeglib.h seems to be a little messy
+extern "C" {
+// mingw includes rpcndr.h but does not define boolean
+#if defined(Q_OS_WIN) && defined(Q_CC_GNU)
+#   if defined(__RPCNDR_H__) && !defined(boolean)
+        typedef unsigned char boolean;
+#       define HAVE_BOOLEAN
+#   endif
+#endif
+
+#define XMD_H           // shut JPEGlib up
+#if defined(Q_OS_UNIXWARE)
+#  define HAVE_BOOLEAN  // libjpeg under Unixware seems to need this
+#endif
+#include <jpeglib.h>
+#ifdef const
+#  undef const          // remove crazy C hackery in jconfig.h
+#endif
+}
+
+QT_BEGIN_NAMESPACE
+
+struct my_error_mgr : public jpeg_error_mgr {
+    jmp_buf setjmp_buffer;
+};
+
+#if defined(Q_C_CALLBACKS)
+extern "C" {
+#endif
+
+static void my_error_exit (j_common_ptr cinfo)
+{
+    my_error_mgr* myerr = (my_error_mgr*) cinfo->err;
+    char buffer[JMSG_LENGTH_MAX];
+    (*cinfo->err->format_message)(cinfo, buffer);
+    qWarning("%s", buffer);
+    longjmp(myerr->setjmp_buffer, 1);
+}
+
+#if defined(Q_C_CALLBACKS)
+}
+#endif
+
+
+static const int max_buf = 4096;
+
+struct my_jpeg_source_mgr : public jpeg_source_mgr {
+    // Nothing dynamic - cannot rely on destruction over longjump
+    QIODevice *device;
+    JOCTET buffer[max_buf];
+    const QBuffer *memDevice;
+
+public:
+    my_jpeg_source_mgr(QIODevice *device);
+};
+
+#if defined(Q_C_CALLBACKS)
+extern "C" {
+#endif
+
+static void qt_init_source(j_decompress_ptr)
+{
+}
+
+static boolean qt_fill_input_buffer(j_decompress_ptr cinfo)
+{
+    my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src;
+    if (src->memDevice) {
+        src->next_input_byte = (const JOCTET *)(src->memDevice->data().constData() + src->memDevice->pos());
+        src->bytes_in_buffer = (size_t)(src->memDevice->data().size() - src->memDevice->pos());
+        return true;
+    }
+    src->next_input_byte = src->buffer;
+    int num_read = src->device->read((char*)src->buffer, max_buf);
+    if (num_read <= 0) {
+        // Insert a fake EOI marker - as per jpeglib recommendation
+        src->buffer[0] = (JOCTET) 0xFF;
+        src->buffer[1] = (JOCTET) JPEG_EOI;
+        src->bytes_in_buffer = 2;
+    } else {
+        src->bytes_in_buffer = num_read;
+    }
+#if defined(Q_OS_UNIXWARE)
+    return B_TRUE;
+#else
+    return true;
+#endif
+}
+
+static void qt_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
+{
+    my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src;
+
+    // `dumb' implementation from jpeglib
+
+    /* Just a dumb implementation for now.  Could use fseek() except
+     * it doesn't work on pipes.  Not clear that being smart is worth
+     * any trouble anyway --- large skips are infrequent.
+     */
+    if (num_bytes > 0) {
+        while (num_bytes > (long) src->bytes_in_buffer) {  // Should not happen in case of memDevice
+            num_bytes -= (long) src->bytes_in_buffer;
+            (void) qt_fill_input_buffer(cinfo);
+            /* note we assume that qt_fill_input_buffer will never return false,
+            * so suspension need not be handled.
+            */
+        }
+        src->next_input_byte += (size_t) num_bytes;
+        src->bytes_in_buffer -= (size_t) num_bytes;
+    }
+}
+
+static void qt_term_source(j_decompress_ptr cinfo)
+{
+    my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src;
+    if (!src->device->isSequential())
+    {
+        // read() isn't used for memDevice, so seek past everything that was used
+        if (src->memDevice)
+            src->device->seek(src->device->pos() + (src->memDevice->data().size() - src->memDevice->pos() - src->bytes_in_buffer));
+        else
+            src->device->seek(src->device->pos() - src->bytes_in_buffer);
+    }
+}
+
+#if defined(Q_C_CALLBACKS)
+}
+#endif
+
+inline my_jpeg_source_mgr::my_jpeg_source_mgr(QIODevice *device)
+{
+    jpeg_source_mgr::init_source = qt_init_source;
+    jpeg_source_mgr::fill_input_buffer = qt_fill_input_buffer;
+    jpeg_source_mgr::skip_input_data = qt_skip_input_data;
+    jpeg_source_mgr::resync_to_restart = jpeg_resync_to_restart;
+    jpeg_source_mgr::term_source = qt_term_source;
+    this->device = device;
+    memDevice = qobject_cast<QBuffer *>(device);
+    bytes_in_buffer = 0;
+    next_input_byte = buffer;
+}
+
+
+inline static bool read_jpeg_size(int &w, int &h, j_decompress_ptr cinfo)
+{
+    (void) jpeg_calc_output_dimensions(cinfo);
+
+    w = cinfo->output_width;
+    h = cinfo->output_height;
+    return true;
+}
+
+#define HIGH_QUALITY_THRESHOLD 50
+
+inline static bool read_jpeg_format(QImage::Format &format, j_decompress_ptr cinfo)
+{
+
+    bool result = true;
+    switch (cinfo->output_components) {
+    case 1:
+        format = QImage::Format_Indexed8;
+        break;
+    case 3:
+    case 4:
+        format = QImage::Format_RGB32;
+        break;
+    default:
+        result = false;
+        break;
+    }
+    cinfo->output_scanline = cinfo->output_height;
+    return result;
+}
+
+static bool ensureValidImage(QImage *dest, struct jpeg_decompress_struct *info,
+                             const QSize& size)
+{
+    QImage::Format format;
+    switch (info->output_components) {
+    case 1:
+        format = QImage::Format_Indexed8;
+        break;
+    case 3:
+    case 4:
+        format = QImage::Format_RGB32;
+        break;
+    default:
+        return false; // unsupported format
+    }
+
+    if (dest->size() != size || dest->format() != format) {
+        *dest = QImage(size, format);
+
+        if (format == QImage::Format_Indexed8) {
+            dest->setColorCount(256);
+            for (int i = 0; i < 256; i++)
+                dest->setColor(i, qRgb(i,i,i));
+        }
+    }
+
+    return !dest->isNull();
+}
+
+static bool read_jpeg_image(QImage *outImage,
+                            QSize scaledSize, QRect scaledClipRect,
+                            QRect clipRect, int inQuality, j_decompress_ptr info, struct my_error_mgr* err  )
+{
+    if (!setjmp(err->setjmp_buffer)) {
+        // -1 means default quality.
+        int quality = inQuality;
+        if (quality < 0)
+            quality = 75;
+
+        // If possible, merge the scaledClipRect into either scaledSize
+        // or clipRect to avoid doing a separate scaled clipping pass.
+        // Best results are achieved by clipping before scaling, not after.
+        if (!scaledClipRect.isEmpty()) {
+            if (scaledSize.isEmpty() && clipRect.isEmpty()) {
+                // No clipping or scaling before final clip.
+                clipRect = scaledClipRect;
+                scaledClipRect = QRect();
+            } else if (scaledSize.isEmpty()) {
+                // Clipping, but no scaling: combine the clip regions.
+                scaledClipRect.translate(clipRect.topLeft());
+                clipRect = scaledClipRect.intersected(clipRect);
+                scaledClipRect = QRect();
+            } else if (clipRect.isEmpty()) {
+                // No clipping, but scaling: if we can map back to an
+                // integer pixel boundary, then clip before scaling.
+                if ((info->image_width % scaledSize.width()) == 0 &&
+                        (info->image_height % scaledSize.height()) == 0) {
+                    int x = scaledClipRect.x() * info->image_width /
+                            scaledSize.width();
+                    int y = scaledClipRect.y() * info->image_height /
+                            scaledSize.height();
+                    int width = (scaledClipRect.right() + 1) *
+                                info->image_width / scaledSize.width() - x;
+                    int height = (scaledClipRect.bottom() + 1) *
+                                 info->image_height / scaledSize.height() - y;
+                    clipRect = QRect(x, y, width, height);
+                    scaledSize = scaledClipRect.size();
+                    scaledClipRect = QRect();
+                }
+            } else {
+                // Clipping and scaling: too difficult to figure out,
+                // and not a likely use case, so do it the long way.
+            }
+        }
+
+        // Determine the scale factor to pass to libjpeg for quick downscaling.
+        if (!scaledSize.isEmpty()) {
+            if (clipRect.isEmpty()) {
+                info->scale_denom =
+                    qMin(info->image_width / scaledSize.width(),
+                         info->image_height / scaledSize.height());
+            } else {
+                info->scale_denom =
+                    qMin(clipRect.width() / scaledSize.width(),
+                         clipRect.height() / scaledSize.height());
+            }
+            if (info->scale_denom < 2) {
+                info->scale_denom = 1;
+            } else if (info->scale_denom < 4) {
+                info->scale_denom = 2;
+            } else if (info->scale_denom < 8) {
+                info->scale_denom = 4;
+            } else {
+                info->scale_denom = 8;
+            }
+            info->scale_num = 1;
+            if (!clipRect.isEmpty()) {
+                // Correct the scale factor so that we clip accurately.
+                // It is recommended that the clip rectangle be aligned
+                // on an 8-pixel boundary for best performance.
+                while (info->scale_denom > 1 &&
+                       ((clipRect.x() % info->scale_denom) != 0 ||
+                        (clipRect.y() % info->scale_denom) != 0 ||
+                        (clipRect.width() % info->scale_denom) != 0 ||
+                        (clipRect.height() % info->scale_denom) != 0)) {
+                    info->scale_denom /= 2;
+                }
+            }
+        }
+
+        // If high quality not required, use fast decompression
+        if( quality < HIGH_QUALITY_THRESHOLD ) {
+            info->dct_method = JDCT_IFAST;
+            info->do_fancy_upsampling = FALSE;
+        }
+
+        (void) jpeg_calc_output_dimensions(info);
+
+        // Determine the clip region to extract.
+        QRect imageRect(0, 0, info->output_width, info->output_height);
+        QRect clip;
+        if (clipRect.isEmpty()) {
+            clip = imageRect;
+        } else if (info->scale_denom == info->scale_num) {
+            clip = clipRect.intersected(imageRect);
+        } else {
+            // The scale factor was corrected above to ensure that
+            // we don't miss pixels when we scale the clip rectangle.
+            clip = QRect(clipRect.x() / int(info->scale_denom),
+                         clipRect.y() / int(info->scale_denom),
+                         clipRect.width() / int(info->scale_denom),
+                         clipRect.height() / int(info->scale_denom));
+            clip = clip.intersected(imageRect);
+        }
+
+        // Allocate memory for the clipped QImage.
+        if (!ensureValidImage(outImage, info, clip.size()))
+            longjmp(err->setjmp_buffer, 1);
+
+        // Avoid memcpy() overhead if grayscale with no clipping.
+        bool quickGray = (info->output_components == 1 &&
+                          clip == imageRect);
+        if (!quickGray) {
+            // Ask the jpeg library to allocate a temporary row.
+            // The library will automatically delete it for us later.
+            // The libjpeg docs say we should do this before calling
+            // jpeg_start_decompress().  We can't use "new" here
+            // because we are inside the setjmp() block and an error
+            // in the jpeg input stream would cause a memory leak.
+            JSAMPARRAY rows = (info->mem->alloc_sarray)
+                              ((j_common_ptr)info, JPOOL_IMAGE,
+                               info->output_width * info->output_components, 1);
+
+            (void) jpeg_start_decompress(info);
+
+            while (info->output_scanline < info->output_height) {
+                int y = int(info->output_scanline) - clip.y();
+                if (y >= clip.height())
+                    break;      // We've read the entire clip region, so abort.
+
+                (void) jpeg_read_scanlines(info, rows, 1);
+
+                if (y < 0)
+                    continue;   // Haven't reached the starting line yet.
+
+                if (info->output_components == 3) {
+                    // Expand 24->32 bpp.
+                    uchar *in = rows[0] + clip.x() * 3;
+                    QRgb *out = (QRgb*)outImage->scanLine(y);
+                    for (int i = 0; i < clip.width(); ++i) {
+                        *out++ = qRgb(in[0], in[1], in[2]);
+                        in += 3;
+                    }
+                } else if (info->out_color_space == JCS_CMYK) {
+                    // Convert CMYK->RGB.
+                    uchar *in = rows[0] + clip.x() * 4;
+                    QRgb *out = (QRgb*)outImage->scanLine(y);
+                    for (int i = 0; i < clip.width(); ++i) {
+                        int k = in[3];
+                        *out++ = qRgb(k * in[0] / 255, k * in[1] / 255,
+                                      k * in[2] / 255);
+                        in += 4;
+                    }
+                } else if (info->output_components == 1) {
+                    // Grayscale.
+                    memcpy(outImage->scanLine(y),
+                           rows[0] + clip.x(), clip.width());
+                }
+            }
+        } else {
+            // Load unclipped grayscale data directly into the QImage.
+            (void) jpeg_start_decompress(info);
+            while (info->output_scanline < info->output_height) {
+                uchar *row = outImage->scanLine(info->output_scanline);
+                (void) jpeg_read_scanlines(info, &row, 1);
+            }
+        }
+
+        if (info->output_scanline == info->output_height)
+            (void) jpeg_finish_decompress(info);
+
+        if (info->density_unit == 1) {
+            outImage->setDotsPerMeterX(int(100. * info->X_density / 2.54));
+            outImage->setDotsPerMeterY(int(100. * info->Y_density / 2.54));
+        } else if (info->density_unit == 2) {
+            outImage->setDotsPerMeterX(int(100. * info->X_density));
+            outImage->setDotsPerMeterY(int(100. * info->Y_density));
+        }
+
+        if (scaledSize.isValid() && scaledSize != clip.size()) {
+            *outImage = outImage->scaled(scaledSize, Qt::IgnoreAspectRatio, quality >= HIGH_QUALITY_THRESHOLD ? Qt::SmoothTransformation : Qt::FastTransformation);
+        }
+
+        if (!scaledClipRect.isEmpty())
+            *outImage = outImage->copy(scaledClipRect);
+        return !outImage->isNull();
+    }
+    else
+        return false;
+}
+
+struct my_jpeg_destination_mgr : public jpeg_destination_mgr {
+    // Nothing dynamic - cannot rely on destruction over longjump
+    QIODevice *device;
+    JOCTET buffer[max_buf];
+
+public:
+    my_jpeg_destination_mgr(QIODevice *);
+};
+
+
+#if defined(Q_C_CALLBACKS)
+extern "C" {
+#endif
+
+static void qt_init_destination(j_compress_ptr)
+{
+}
+
+static boolean qt_empty_output_buffer(j_compress_ptr cinfo)
+{
+    my_jpeg_destination_mgr* dest = (my_jpeg_destination_mgr*)cinfo->dest;
+
+    int written = dest->device->write((char*)dest->buffer, max_buf);
+    if (written == -1)
+        (*cinfo->err->error_exit)((j_common_ptr)cinfo);
+
+    dest->next_output_byte = dest->buffer;
+    dest->free_in_buffer = max_buf;
+
+#if defined(Q_OS_UNIXWARE)
+    return B_TRUE;
+#else
+    return true;
+#endif
+}
+
+static void qt_term_destination(j_compress_ptr cinfo)
+{
+    my_jpeg_destination_mgr* dest = (my_jpeg_destination_mgr*)cinfo->dest;
+    qint64 n = max_buf - dest->free_in_buffer;
+
+    qint64 written = dest->device->write((char*)dest->buffer, n);
+    if (written == -1)
+        (*cinfo->err->error_exit)((j_common_ptr)cinfo);
+}
+
+#if defined(Q_C_CALLBACKS)
+}
+#endif
+
+inline my_jpeg_destination_mgr::my_jpeg_destination_mgr(QIODevice *device)
+{
+    jpeg_destination_mgr::init_destination = qt_init_destination;
+    jpeg_destination_mgr::empty_output_buffer = qt_empty_output_buffer;
+    jpeg_destination_mgr::term_destination = qt_term_destination;
+    this->device = device;
+    next_output_byte = buffer;
+    free_in_buffer = max_buf;
+}
+
+static bool can_write_format(QImage::Format fmt)
+{
+    switch (fmt) {
+    case QImage::Format_Mono:
+    case QImage::Format_MonoLSB:
+    case QImage::Format_Indexed8:
+    case QImage::Format_RGB888:
+    case QImage::Format_RGB32:
+    case QImage::Format_ARGB32:
+    case QImage::Format_ARGB32_Premultiplied:
+        return true;
+        break;
+    default:
+        break;
+    }
+    return false;
+}
+
+static bool write_jpeg_image(const QImage &sourceImage, QIODevice *device, int sourceQuality)
+{
+    bool success = false;
+    const QImage image = can_write_format(sourceImage.format()) ?
+                         sourceImage : sourceImage.convertToFormat(QImage::Format_RGB888);
+    const QVector<QRgb> cmap = image.colorTable();
+
+    struct jpeg_compress_struct cinfo;
+    JSAMPROW row_pointer[1];
+    row_pointer[0] = 0;
+
+    struct my_jpeg_destination_mgr *iod_dest = new my_jpeg_destination_mgr(device);
+    struct my_error_mgr jerr;
+
+    cinfo.err = jpeg_std_error(&jerr);
+    jerr.error_exit = my_error_exit;
+
+    if (!setjmp(jerr.setjmp_buffer)) {
+        // WARNING:
+        // this if loop is inside a setjmp/longjmp branch
+        // do not create C++ temporaries here because the destructor may never be called
+        // if you allocate memory, make sure that you can free it (row_pointer[0])
+        jpeg_create_compress(&cinfo);
+
+        cinfo.dest = iod_dest;
+
+        cinfo.image_width = image.width();
+        cinfo.image_height = image.height();
+
+        bool gray=false;
+        switch (image.format()) {
+        case QImage::Format_Mono:
+        case QImage::Format_MonoLSB:
+        case QImage::Format_Indexed8:
+            gray = true;
+            for (int i = image.colorCount(); gray && i--;) {
+                gray = gray & (qRed(cmap[i]) == qGreen(cmap[i]) &&
+                               qRed(cmap[i]) == qBlue(cmap[i]));
+            }
+            cinfo.input_components = gray ? 1 : 3;
+            cinfo.in_color_space = gray ? JCS_GRAYSCALE : JCS_RGB;
+            break;
+        default:
+            cinfo.input_components = 3;
+            cinfo.in_color_space = JCS_RGB;
+        }
+
+        jpeg_set_defaults(&cinfo);
+
+        qreal diffInch = qAbs(image.dotsPerMeterX()*2.54/100. - qRound(image.dotsPerMeterX()*2.54/100.))
+                         + qAbs(image.dotsPerMeterY()*2.54/100. - qRound(image.dotsPerMeterY()*2.54/100.));
+        qreal diffCm = (qAbs(image.dotsPerMeterX()/100. - qRound(image.dotsPerMeterX()/100.))
+                        + qAbs(image.dotsPerMeterY()/100. - qRound(image.dotsPerMeterY()/100.)))*2.54;
+        if (diffInch < diffCm) {
+            cinfo.density_unit = 1; // dots/inch
+            cinfo.X_density = qRound(image.dotsPerMeterX()*2.54/100.);
+            cinfo.Y_density = qRound(image.dotsPerMeterY()*2.54/100.);
+        } else {
+            cinfo.density_unit = 2; // dots/cm
+            cinfo.X_density = (image.dotsPerMeterX()+50) / 100;
+            cinfo.Y_density = (image.dotsPerMeterY()+50) / 100;
+        }
+
+
+        int quality = sourceQuality >= 0 ? qMin(sourceQuality,100) : 75;
+#if defined(Q_OS_UNIXWARE)
+        jpeg_set_quality(&cinfo, quality, B_TRUE /* limit to baseline-JPEG values */);
+        jpeg_start_compress(&cinfo, B_TRUE);
+#else
+        jpeg_set_quality(&cinfo, quality, true /* limit to baseline-JPEG values */);
+        jpeg_start_compress(&cinfo, true);
+#endif
+
+        row_pointer[0] = new uchar[cinfo.image_width*cinfo.input_components];
+        int w = cinfo.image_width;
+        while (cinfo.next_scanline < cinfo.image_height) {
+            uchar *row = row_pointer[0];
+            switch (image.format()) {
+            case QImage::Format_Mono:
+            case QImage::Format_MonoLSB:
+                if (gray) {
+                    const uchar* data = image.scanLine(cinfo.next_scanline);
+                    if (image.format() == QImage::Format_MonoLSB) {
+                        for (int i=0; i<w; i++) {
+                            bool bit = !!(*(data + (i >> 3)) & (1 << (i & 7)));
+                            row[i] = qRed(cmap[bit]);
+                        }
+                    } else {
+                        for (int i=0; i<w; i++) {
+                            bool bit = !!(*(data + (i >> 3)) & (1 << (7 -(i & 7))));
+                            row[i] = qRed(cmap[bit]);
+                        }
+                    }
+                } else {
+                    const uchar* data = image.scanLine(cinfo.next_scanline);
+                    if (image.format() == QImage::Format_MonoLSB) {
+                        for (int i=0; i<w; i++) {
+                            bool bit = !!(*(data + (i >> 3)) & (1 << (i & 7)));
+                            *row++ = qRed(cmap[bit]);
+                            *row++ = qGreen(cmap[bit]);
+                            *row++ = qBlue(cmap[bit]);
+                        }
+                    } else {
+                        for (int i=0; i<w; i++) {
+                            bool bit = !!(*(data + (i >> 3)) & (1 << (7 -(i & 7))));
+                            *row++ = qRed(cmap[bit]);
+                            *row++ = qGreen(cmap[bit]);
+                            *row++ = qBlue(cmap[bit]);
+                        }
+                    }
+                }
+                break;
+            case QImage::Format_Indexed8:
+                if (gray) {
+                    const uchar* pix = image.scanLine(cinfo.next_scanline);
+                    for (int i=0; i<w; i++) {
+                        *row = qRed(cmap[*pix]);
+                        ++row; ++pix;
+                    }
+                } else {
+                    const uchar* pix = image.scanLine(cinfo.next_scanline);
+                    for (int i=0; i<w; i++) {
+                        *row++ = qRed(cmap[*pix]);
+                        *row++ = qGreen(cmap[*pix]);
+                        *row++ = qBlue(cmap[*pix]);
+                        ++pix;
+                    }
+                }
+                break;
+            case QImage::Format_RGB888:
+                memcpy(row, image.scanLine(cinfo.next_scanline), w * 3);
+                break;
+            case QImage::Format_RGB32:
+            case QImage::Format_ARGB32:
+            case QImage::Format_ARGB32_Premultiplied: {
+                QRgb* rgb = (QRgb*)image.scanLine(cinfo.next_scanline);
+                for (int i=0; i<w; i++) {
+                    *row++ = qRed(*rgb);
+                    *row++ = qGreen(*rgb);
+                    *row++ = qBlue(*rgb);
+                    ++rgb;
+                }
+                break;
+            }
+            default:
+                qWarning("QJpegHandler: unable to write image of format %i",
+                         image.format());
+                break;
+            }
+            jpeg_write_scanlines(&cinfo, row_pointer, 1);
+        }
+
+        jpeg_finish_compress(&cinfo);
+        jpeg_destroy_compress(&cinfo);
+        success = true;
+    } else {
+        jpeg_destroy_compress(&cinfo);
+        success = false;
+    }
+
+    delete iod_dest;
+    delete [] row_pointer[0];
+    return success;
+}
+
+class QJpegHandlerPrivate
+{
+public:
+    enum State {
+        Ready,
+        ReadHeader,
+        Error
+    };
+
+    QJpegHandlerPrivate(QJpegHandler *qq)
+        : quality(75), iod_src(0), state(Ready), q(qq)
+    {}
+
+    ~QJpegHandlerPrivate()
+    {
+        if(iod_src)
+        {
+            jpeg_destroy_decompress(&info);
+            delete iod_src;
+            iod_src = 0;
+        }
+    }
+
+    bool readJpegHeader(QIODevice*);
+    bool read(QImage *image);
+
+    int quality;
+    QVariant size;
+    QImage::Format format;
+    QSize scaledSize;
+    QRect scaledClipRect;
+    QRect clipRect;
+    struct jpeg_decompress_struct info;
+    struct my_jpeg_source_mgr * iod_src;
+    struct my_error_mgr err;
+
+    State state;
+
+    QJpegHandler *q;
+};
+
+/*!
+    \internal
+*/
+bool QJpegHandlerPrivate::readJpegHeader(QIODevice *device)
+{
+    if(state == Ready)
+    {
+        state = Error;
+        iod_src = new my_jpeg_source_mgr(device);
+
+        jpeg_create_decompress(&info);
+        info.src = iod_src;
+        info.err = jpeg_std_error(&err);
+        err.error_exit = my_error_exit;
+
+        if (!setjmp(err.setjmp_buffer)) {
+    #if defined(Q_OS_UNIXWARE)
+            (void) jpeg_read_header(&info, B_TRUE);
+    #else
+            (void) jpeg_read_header(&info, true);
+    #endif
+
+            int width = 0;
+            int height = 0;
+            read_jpeg_size(width, height, &info);
+            size = QSize(width, height);
+
+            format = QImage::Format_Invalid;
+            read_jpeg_format(format, &info);
+            state = ReadHeader;
+            return true;
+        }
+        else
+        {
+            return false;
+        }
+    }
+    else if(state == Error)
+        return false;
+    return true;
+}
+
+bool QJpegHandlerPrivate::read(QImage *image)
+{
+    if(state == Ready)
+        readJpegHeader(q->device());
+
+    if(state == ReadHeader)
+    {
+        bool success = read_jpeg_image(image, scaledSize, scaledClipRect, clipRect, quality,  &info, &err);
+        state = success ? Ready : Error;
+        return success;
+    }
+
+    return false;
+
+}
+
+QJpegHandler::QJpegHandler()
+    : d(new QJpegHandlerPrivate(this))
+{
+}
+
+QJpegHandler::~QJpegHandler()
+{
+    delete d;
+}
+
+bool QJpegHandler::canRead() const
+{
+    if(d->state == QJpegHandlerPrivate::Ready && !canRead(device()))
+        return false;
+
+    if (d->state != QJpegHandlerPrivate::Error) {
+        setFormat("jpeg");
+        return true;
+    }
+
+    return false;
+}
+
+bool QJpegHandler::canRead(QIODevice *device)
+{
+    if (!device) {
+        qWarning("QJpegHandler::canRead() called with no device");
+        return false;
+    }
+
+    char buffer[2];
+    if (device->peek(buffer, 2) != 2)
+        return false;
+    return uchar(buffer[0]) == 0xff && uchar(buffer[1]) == 0xd8;
+}
+
+bool QJpegHandler::read(QImage *image)
+{
+    if (!canRead())
+        return false;
+    return d->read(image);
+}
+
+bool QJpegHandler::write(const QImage &image)
+{
+    return write_jpeg_image(image, device(), d->quality);
+}
+
+bool QJpegHandler::supportsOption(ImageOption option) const
+{
+    return option == Quality
+        || option == ScaledSize
+        || option == ScaledClipRect
+        || option == ClipRect
+        || option == Size
+        || option == ImageFormat;
+}
+
+QVariant QJpegHandler::option(ImageOption option) const
+{
+    switch(option) {
+    case Quality:
+        return d->quality;
+    case ScaledSize:
+        return d->scaledSize;
+    case ScaledClipRect:
+        return d->scaledClipRect;
+    case ClipRect:
+        return d->clipRect;
+    case Size:
+        d->readJpegHeader(device());
+        return d->size;
+    case ImageFormat:
+        d->readJpegHeader(device());
+        return d->format;
+    default:
+        return QVariant();
+    }
+}
+
+void QJpegHandler::setOption(ImageOption option, const QVariant &value)
+{
+    switch(option) {
+    case Quality:
+        d->quality = value.toInt();
+        break;
+    case ScaledSize:
+        d->scaledSize = value.toSize();
+        break;
+    case ScaledClipRect:
+        d->scaledClipRect = value.toRect();
+        break;
+    case ClipRect:
+        d->clipRect = value.toRect();
+        break;
+    default:
+        break;
+    }
+}
+
+QByteArray QJpegHandler::name() const
+{
+    return "jpeg";
+}
+
+
+
+
+QT_END_NAMESPACE
diff --git a/src/gui/image/qjpeghandler.h b/src/gui/image/qjpeghandler.h
new file mode 100644
index 0000000..c879f21
--- /dev/null
+++ b/src/gui/image/qjpeghandler.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QJPEGHANDLER_H
+#define QJPEGHANDLER_H
+
+#include <QtGui/qimageiohandler.h>
+#include <QtCore/QSize>
+#include <QtCore/QRect>
+
+QT_BEGIN_NAMESPACE
+
+class QJpegHandlerPrivate;
+class QJpegHandler : public QImageIOHandler
+{
+public:
+    QJpegHandler();
+    ~QJpegHandler();
+
+    bool canRead() const;
+    bool read(QImage *image);
+    bool write(const QImage &image);
+
+    QByteArray name() const;
+
+    static bool canRead(QIODevice *device);
+
+    QVariant option(ImageOption option) const;
+    void setOption(ImageOption option, const QVariant &value);
+    bool supportsOption(ImageOption option) const;
+
+private:
+    QJpegHandlerPrivate *d;
+};
+
+QT_END_NAMESPACE
+
+#endif // QJPEGHANDLER_H
diff --git a/src/gui/image/qjpeghandler.pri b/src/gui/image/qjpeghandler.pri
new file mode 100644
index 0000000..28ec7dc
--- /dev/null
+++ b/src/gui/image/qjpeghandler.pri
@@ -0,0 +1,10 @@
+# common to plugin and built-in forms
+INCLUDEPATH *= $$PWD
+HEADERS += $$PWD/qjpeghandler.h
+SOURCES += $$PWD/qjpeghandler.cpp
+contains(QT_CONFIG, system-jpeg) {
+    if(unix|win32-g++*): LIBS += -ljpeg
+    else:win32:          LIBS += libjpeg.lib
+} else {
+    include($$PWD/../../3rdparty/libjpeg.pri)
+}
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
diff --git a/src/gui/image/qmnghandler.h b/src/gui/image/qmnghandler.h
new file mode 100644
index 0000000..65243be
--- /dev/null
+++ b/src/gui/image/qmnghandler.h
@@ -0,0 +1,83 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QMNGHANDLER_H
+#define QMNGHANDLER_H
+
+#include <QtCore/qscopedpointer.h>
+#include <QtGui/qimageiohandler.h>
+
+QT_BEGIN_NAMESPACE
+
+class QImage;
+class QByteArray;
+class QIODevice;
+class QVariant;
+class QMngHandlerPrivate;
+
+class QMngHandler : public QImageIOHandler
+{
+    public:
+    QMngHandler();
+    ~QMngHandler();
+    virtual bool canRead() const;
+    virtual QByteArray name() const;
+    virtual bool read(QImage *image);
+    virtual bool write(const QImage &image);
+    virtual int currentImageNumber() const;
+    virtual int imageCount() const;
+    virtual bool jumpToImage(int imageNumber);
+    virtual bool jumpToNextImage();
+    virtual int loopCount() const;
+    virtual int nextImageDelay() const;
+    static bool canRead(QIODevice *device);
+    virtual QVariant option(ImageOption option) const;
+    virtual void setOption(ImageOption option, const QVariant & value);
+    virtual bool supportsOption(ImageOption option) const;
+
+    private:
+    Q_DECLARE_PRIVATE(QMngHandler)
+    QScopedPointer<QMngHandlerPrivate> d_ptr;
+};
+
+QT_END_NAMESPACE
+
+#endif // QMNGHANDLER_H
diff --git a/src/gui/image/qmnghandler.pri b/src/gui/image/qmnghandler.pri
new file mode 100644
index 0000000..ec1c19e
--- /dev/null
+++ b/src/gui/image/qmnghandler.pri
@@ -0,0 +1,10 @@
+# common to plugin and built-in forms
+INCLUDEPATH *= $$PWD
+HEADERS += $$PWD/qmnghandler.h
+SOURCES += $$PWD/qmnghandler.cpp
+contains(QT_CONFIG, system-mng) {
+        if(unix|win32-g++*):LIBS += -lmng
+        else:win32:         LIBS += libmng.lib
+} else {
+    include($$PWD/../../3rdparty/libmng.pri)
+}
diff --git a/src/gui/image/qpnghandler.pri b/src/gui/image/qpnghandler.pri
new file mode 100644
index 0000000..bedf23f
--- /dev/null
+++ b/src/gui/image/qpnghandler.pri
@@ -0,0 +1,10 @@
+INCLUDEPATH *= $$PWD
+HEADERS += $$PWD/qpnghandler_p.h
+SOURCES += $$PWD/qpnghandler.cpp
+contains(QT_CONFIG, system-png) {
+    if(unix|win32-g++*): LIBS_PRIVATE  += -lpng
+    else:win32:          LIBS += libpng.lib
+
+} else {
+    include($$PWD/../../3rdparty/libpng.pri)
+}
diff --git a/src/gui/image/qtiffhandler.cpp b/src/gui/image/qtiffhandler.cpp
new file mode 100644
index 0000000..619aa4e
--- /dev/null
+++ b/src/gui/image/qtiffhandler.cpp
@@ -0,0 +1,661 @@
+/****************************************************************************
+**
+** 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 "qtiffhandler.h"
+#include <qvariant.h>
+#include <qdebug.h>
+#include <qimage.h>
+#include <qglobal.h>
+extern "C" {
+#include "tiffio.h"
+}
+
+QT_BEGIN_NAMESPACE
+
+tsize_t qtiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
+{
+    QIODevice* device = static_cast<QTiffHandler*>(fd)->device();
+    return device->isReadable() ? device->read(static_cast<char *>(buf), size) : -1;
+}
+
+tsize_t qtiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
+{
+    return static_cast<QTiffHandler*>(fd)->device()->write(static_cast<char *>(buf), size);
+}
+
+toff_t qtiffSeekProc(thandle_t fd, toff_t off, int whence)
+{
+    QIODevice *device = static_cast<QTiffHandler*>(fd)->device();
+    switch (whence) {
+    case SEEK_SET:
+        device->seek(off);
+        break;
+    case SEEK_CUR:
+        device->seek(device->pos() + off);
+        break;
+    case SEEK_END:
+        device->seek(device->size() + off);
+        break;
+    }
+
+    return device->pos();
+}
+
+int qtiffCloseProc(thandle_t /*fd*/)
+{
+    return 0;
+}
+
+toff_t qtiffSizeProc(thandle_t fd)
+{
+    return static_cast<QTiffHandler*>(fd)->device()->size();
+}
+
+int qtiffMapProc(thandle_t /*fd*/, tdata_t* /*pbase*/, toff_t* /*psize*/)
+{
+    return 0;
+}
+
+void qtiffUnmapProc(thandle_t /*fd*/, tdata_t /*base*/, toff_t /*size*/)
+{
+}
+
+// for 32 bits images
+inline void rotate_right_mirror_horizontal(QImage *const image)// rotate right->mirrored horizontal
+{
+    const int height = image->height();
+    const int width = image->width();
+    QImage generated(/* width = */ height, /* height = */ width, image->format());
+    const uint32 *originalPixel = reinterpret_cast<const uint32*>(image->bits());
+    uint32 *const generatedPixels = reinterpret_cast<uint32*>(generated.bits());
+    for (int row=0; row < height; ++row) {
+        for (int col=0; col < width; ++col) {
+            int idx = col * height + row;
+            generatedPixels[idx] = *originalPixel;
+            ++originalPixel;
+        }
+    }
+    *image = generated;
+}
+
+inline void rotate_right_mirror_vertical(QImage *const image) // rotate right->mirrored vertical
+{
+    const int height = image->height();
+    const int width = image->width();
+    QImage generated(/* width = */ height, /* height = */ width, image->format());
+    const int lastCol = width - 1;
+    const int lastRow = height - 1;
+    const uint32 *pixel = reinterpret_cast<const uint32*>(image->bits());
+    uint32 *const generatedBits = reinterpret_cast<uint32*>(generated.bits());
+    for (int row=0; row < height; ++row) {
+        for (int col=0; col < width; ++col) {
+            int idx = (lastCol - col) * height + (lastRow - row);
+            generatedBits[idx] = *pixel;
+            ++pixel;
+        }
+    }
+    *image = generated;
+}
+
+QTiffHandler::QTiffHandler() : QImageIOHandler()
+{
+    compression = NoCompression;
+}
+
+bool QTiffHandler::canRead() const
+{
+    if (canRead(device())) {
+        setFormat("tiff");
+        return true;
+    }
+    return false;
+}
+
+bool QTiffHandler::canRead(QIODevice *device)
+{
+    if (!device) {
+        qWarning("QTiffHandler::canRead() called with no device");
+        return false;
+    }
+
+    // current implementation uses TIFFClientOpen which needs to be
+    // able to seek, so sequential devices are not supported
+    QByteArray header = device->peek(4);
+    return header == QByteArray::fromRawData("\x49\x49\x2A\x00", 4)
+           || header == QByteArray::fromRawData("\x4D\x4D\x00\x2A", 4);
+}
+
+bool QTiffHandler::read(QImage *image)
+{
+    if (!canRead())
+        return false;
+
+    TIFF *const tiff = TIFFClientOpen("foo",
+                                      "r",
+                                      this,
+                                      qtiffReadProc,
+                                      qtiffWriteProc,
+                                      qtiffSeekProc,
+                                      qtiffCloseProc,
+                                      qtiffSizeProc,
+                                      qtiffMapProc,
+                                      qtiffUnmapProc);
+
+    if (!tiff) {
+        return false;
+    }
+    uint32 width;
+    uint32 height;
+    uint16 photometric;
+    if (!TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &width)
+        || !TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &height)
+        || !TIFFGetField(tiff, TIFFTAG_PHOTOMETRIC, &photometric)) {
+        TIFFClose(tiff);
+        return false;
+    }
+
+    // BitsPerSample defaults to 1 according to the TIFF spec.
+    uint16 bitPerSample;
+    if (!TIFFGetField(tiff, TIFFTAG_BITSPERSAMPLE, &bitPerSample))
+        bitPerSample = 1;
+
+    bool grayscale = photometric == PHOTOMETRIC_MINISBLACK || photometric == PHOTOMETRIC_MINISWHITE;
+    if (grayscale && bitPerSample == 1) {
+        if (image->size() != QSize(width, height) || image->format() != QImage::Format_Mono)
+            *image = QImage(width, height, QImage::Format_Mono);
+        QVector<QRgb> colortable(2);
+        if (photometric == PHOTOMETRIC_MINISBLACK) {
+            colortable[0] = 0xff000000;
+            colortable[1] = 0xffffffff;
+        } else {
+            colortable[0] = 0xffffffff;
+            colortable[1] = 0xff000000;
+        }
+        image->setColorTable(colortable);
+
+        if (!image->isNull()) {
+            for (uint32 y=0; y<height; ++y) {
+                if (TIFFReadScanline(tiff, image->scanLine(y), y, 0) < 0) {
+                    TIFFClose(tiff);
+                    return false;
+                }
+            }
+        }
+    } else {
+        if ((grayscale || photometric == PHOTOMETRIC_PALETTE) && bitPerSample == 8) {
+            if (image->size() != QSize(width, height) || image->format() != QImage::Format_Indexed8)
+                *image = QImage(width, height, QImage::Format_Indexed8);
+            if (!image->isNull()) {
+                const uint16 tableSize = 256;
+                QVector<QRgb> qtColorTable(tableSize);
+                if (grayscale) {
+                    for (int i = 0; i<tableSize; ++i) {
+                        const int c = (photometric == PHOTOMETRIC_MINISBLACK) ? i : (255 - i);
+                        qtColorTable[i] = qRgb(c, c, c);
+                    }
+                } else {
+                    // create the color table
+                    uint16 *redTable = static_cast<uint16 *>(qMalloc(tableSize * sizeof(uint16)));
+                    uint16 *greenTable = static_cast<uint16 *>(qMalloc(tableSize * sizeof(uint16)));
+                    uint16 *blueTable = static_cast<uint16 *>(qMalloc(tableSize * sizeof(uint16)));
+                    if (!redTable || !greenTable || !blueTable) {
+                        TIFFClose(tiff);
+                        return false;
+                    }
+                    if (!TIFFGetField(tiff, TIFFTAG_COLORMAP, &redTable, &greenTable, &blueTable)) {
+                        TIFFClose(tiff);
+                        return false;
+                    }
+
+                    for (int i = 0; i<tableSize ;++i) {
+                        const int red = redTable[i] / 257;
+                        const int green = greenTable[i] / 257;
+                        const int blue = blueTable[i] / 257;
+                        qtColorTable[i] = qRgb(red, green, blue);
+                    }
+                }
+
+                image->setColorTable(qtColorTable);
+                for (uint32 y=0; y<height; ++y) {
+                    if (TIFFReadScanline(tiff, image->scanLine(y), y, 0) < 0) {
+                        TIFFClose(tiff);
+                        return false;
+                    }
+                }
+
+                // free redTable, greenTable and greenTable done by libtiff
+            }
+        } else {
+            if (image->size() != QSize(width, height) || image->format() != QImage::Format_ARGB32)
+                *image = QImage(width, height, QImage::Format_ARGB32);
+            if (!image->isNull()) {
+                const int stopOnError = 1;
+                if (TIFFReadRGBAImageOriented(tiff, width, height, reinterpret_cast<uint32 *>(image->bits()), ORIENTATION_TOPLEFT, stopOnError)) {
+                    for (uint32 y=0; y<height; ++y)
+                        convert32BitOrder(image->scanLine(y), width);
+                } else {
+                    TIFFClose(tiff);
+                    return false;
+                }
+            }
+        }
+    }
+
+    if (image->isNull()) {
+        TIFFClose(tiff);
+        return false;
+    }
+
+    float resX = 0;
+    float resY = 0;
+    uint16 resUnit = RESUNIT_NONE;
+    if (TIFFGetField(tiff, TIFFTAG_RESOLUTIONUNIT, &resUnit)
+        && TIFFGetField(tiff, TIFFTAG_XRESOLUTION, &resX)
+        && TIFFGetField(tiff, TIFFTAG_YRESOLUTION, &resY)) {
+
+        switch(resUnit) {
+        case RESUNIT_CENTIMETER:
+            image->setDotsPerMeterX(qRound(resX * 100));
+            image->setDotsPerMeterY(qRound(resY * 100));
+            break;
+        case RESUNIT_INCH:
+            image->setDotsPerMeterX(qRound(resX * (100 / 2.54)));
+            image->setDotsPerMeterY(qRound(resY * (100 / 2.54)));
+            break;
+        default:
+            // do nothing as defaults have already
+            // been set within the QImage class
+            break;
+        }
+    }
+
+    // rotate the image if the orientation is defined in the file
+    uint16 orientationTag;
+    if (TIFFGetField(tiff, TIFFTAG_ORIENTATION, &orientationTag)) {
+        if (image->format() == QImage::Format_ARGB32) {
+            // TIFFReadRGBAImageOriented() flip the image but does not rotate them
+            switch (orientationTag) {
+            case 5:
+                rotate_right_mirror_horizontal(image);
+                break;
+            case 6:
+                rotate_right_mirror_vertical(image);
+                break;
+            case 7:
+                rotate_right_mirror_horizontal(image);
+                break;
+            case 8:
+                rotate_right_mirror_vertical(image);
+                break;
+            }
+        } else {
+            switch (orientationTag) {
+            case 1: // default orientation
+                break;
+            case 2: // mirror horizontal
+                *image = image->mirrored(true, false);
+                break;
+            case 3: // mirror both
+                *image = image->mirrored(true, true);
+                break;
+            case 4: // mirror vertical
+                *image = image->mirrored(false, true);
+                break;
+            case 5: // rotate right mirror horizontal
+                {
+                    QMatrix transformation;
+                    transformation.rotate(90);
+                    *image = image->transformed(transformation);
+                    *image = image->mirrored(true, false);
+                    break;
+                }
+            case 6: // rotate right
+                {
+                    QMatrix transformation;
+                    transformation.rotate(90);
+                    *image = image->transformed(transformation);
+                    break;
+                }
+            case 7: // rotate right, mirror vertical
+                {
+                    QMatrix transformation;
+                    transformation.rotate(90);
+                    *image = image->transformed(transformation);
+                    *image = image->mirrored(false, true);
+                    break;
+                }
+            case 8: // rotate left
+                {
+                    QMatrix transformation;
+                    transformation.rotate(270);
+                    *image = image->transformed(transformation);
+                    break;
+                }
+            }
+        }
+    }
+
+
+    TIFFClose(tiff);
+    return true;
+}
+
+static bool checkGrayscale(const QVector<QRgb> &colorTable)
+{
+    if (colorTable.size() != 256)
+        return false;
+
+    const bool increasing = (colorTable.at(0) == 0xff000000);
+    for (int i = 0; i < 256; ++i) {
+        if ((increasing && colorTable.at(i) != qRgb(i, i, i))
+            || (!increasing && colorTable.at(i) != qRgb(255 - i, 255 - i, 255 - i)))
+            return false;
+    }
+    return true;
+}
+
+bool QTiffHandler::write(const QImage &image)
+{
+    if (!device()->isWritable())
+        return false;
+
+    TIFF *const tiff = TIFFClientOpen("foo",
+                                      "w",
+                                      this,
+                                      qtiffReadProc,
+                                      qtiffWriteProc,
+                                      qtiffSeekProc,
+                                      qtiffCloseProc,
+                                      qtiffSizeProc,
+                                      qtiffMapProc,
+                                      qtiffUnmapProc);
+    if (!tiff)
+        return false;
+
+    const int width = image.width();
+    const int height = image.height();
+
+    if (!TIFFSetField(tiff, TIFFTAG_IMAGEWIDTH, width)
+        || !TIFFSetField(tiff, TIFFTAG_IMAGELENGTH, height)
+        || !TIFFSetField(tiff, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG)) {
+        TIFFClose(tiff);
+        return false;
+    }
+
+    // set the resolution
+    bool  resolutionSet = false;
+    const int dotPerMeterX = image.dotsPerMeterX();
+    const int dotPerMeterY = image.dotsPerMeterY();
+    if ((dotPerMeterX % 100) == 0
+        && (dotPerMeterY % 100) == 0) {
+        resolutionSet = TIFFSetField(tiff, TIFFTAG_RESOLUTIONUNIT, RESUNIT_CENTIMETER)
+                        && TIFFSetField(tiff, TIFFTAG_XRESOLUTION, dotPerMeterX/100.0)
+                        && TIFFSetField(tiff, TIFFTAG_YRESOLUTION, dotPerMeterY/100.0);
+    } else {
+        resolutionSet = TIFFSetField(tiff, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH)
+                        && TIFFSetField(tiff, TIFFTAG_XRESOLUTION, static_cast<float>(image.logicalDpiX()))
+                        && TIFFSetField(tiff, TIFFTAG_YRESOLUTION, static_cast<float>(image.logicalDpiY()));
+    }
+    if (!resolutionSet) {
+        TIFFClose(tiff);
+        return false;
+    }
+
+    // configure image depth
+    const QImage::Format format = image.format();
+    if (format == QImage::Format_Mono || format == QImage::Format_MonoLSB) {
+        uint16 photometric = PHOTOMETRIC_MINISBLACK;
+        if (image.colorTable().at(0) == 0xffffffff)
+            photometric = PHOTOMETRIC_MINISWHITE;
+        if (!TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, photometric)
+            || !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_CCITTRLE)
+            || !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, 1)) {
+            TIFFClose(tiff);
+            return false;
+        }
+
+        // try to do the conversion in chunks no greater than 16 MB
+        int chunks = (width * height / (1024 * 1024 * 16)) + 1;
+        int chunkHeight = qMax(height / chunks, 1);
+
+        int y = 0;
+        while (y < height) {
+            QImage chunk = image.copy(0, y, width, qMin(chunkHeight, height - y)).convertToFormat(QImage::Format_Mono);
+
+            int chunkStart = y;
+            int chunkEnd = y + chunk.height();
+            while (y < chunkEnd) {
+                if (TIFFWriteScanline(tiff, reinterpret_cast<uint32 *>(chunk.scanLine(y - chunkStart)), y) != 1) {
+                    TIFFClose(tiff);
+                    return false;
+                }
+                ++y;
+            }
+        }
+        TIFFClose(tiff);
+    } else if (format == QImage::Format_Indexed8) {
+        const QVector<QRgb> colorTable = image.colorTable();
+        bool isGrayscale = checkGrayscale(colorTable);
+        if (isGrayscale) {
+            uint16 photometric = PHOTOMETRIC_MINISBLACK;
+            if (image.colorTable().at(0) == 0xffffffff)
+                photometric = PHOTOMETRIC_MINISWHITE;
+            if (!TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, photometric)
+                    || !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_PACKBITS)
+                    || !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, 8)) {
+                TIFFClose(tiff);
+                return false;
+            }
+        } else {
+            if (!TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_PALETTE)
+                    || !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_PACKBITS)
+                    || !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, 8)) {
+                TIFFClose(tiff);
+                return false;
+            }
+            //// write the color table
+            // allocate the color tables
+            uint16 *redTable = static_cast<uint16 *>(qMalloc(256 * sizeof(uint16)));
+            uint16 *greenTable = static_cast<uint16 *>(qMalloc(256 * sizeof(uint16)));
+            uint16 *blueTable = static_cast<uint16 *>(qMalloc(256 * sizeof(uint16)));
+            if (!redTable || !greenTable || !blueTable) {
+                TIFFClose(tiff);
+                return false;
+            }
+
+            // set the color table
+            const int tableSize = colorTable.size();
+            Q_ASSERT(tableSize <= 256);
+            for (int i = 0; i<tableSize; ++i) {
+                const QRgb color = colorTable.at(i);
+                redTable[i] = qRed(color) * 257;
+                greenTable[i] = qGreen(color) * 257;
+                blueTable[i] = qBlue(color) * 257;
+            }
+
+            const bool setColorTableSuccess = TIFFSetField(tiff, TIFFTAG_COLORMAP, redTable, greenTable, blueTable);
+
+            qFree(redTable);
+            qFree(greenTable);
+            qFree(blueTable);
+
+            if (!setColorTableSuccess) {
+                TIFFClose(tiff);
+                return false;
+            }
+        }
+
+        //// write the data
+        // try to do the conversion in chunks no greater than 16 MB
+        int chunks = (width * height/ (1024 * 1024 * 16)) + 1;
+        int chunkHeight = qMax(height / chunks, 1);
+
+        int y = 0;
+        while (y < height) {
+            QImage chunk = image.copy(0, y, width, qMin(chunkHeight, height - y));
+
+            int chunkStart = y;
+            int chunkEnd = y + chunk.height();
+            while (y < chunkEnd) {
+                if (TIFFWriteScanline(tiff, reinterpret_cast<uint32 *>(chunk.scanLine(y - chunkStart)), y) != 1) {
+                    TIFFClose(tiff);
+                    return false;
+                }
+                ++y;
+            }
+        }
+        TIFFClose(tiff);
+
+    } else {
+        if (!TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB)
+            || !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_LZW)
+            || !TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, 4)
+            || !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, 8)) {
+            TIFFClose(tiff);
+            return false;
+        }
+        // try to do the ARGB32 conversion in chunks no greater than 16 MB
+        int chunks = (width * height * 4 / (1024 * 1024 * 16)) + 1;
+        int chunkHeight = qMax(height / chunks, 1);
+
+        int y = 0;
+        while (y < height) {
+            QImage chunk = image.copy(0, y, width, qMin(chunkHeight, height - y)).convertToFormat(QImage::Format_ARGB32);
+
+            int chunkStart = y;
+            int chunkEnd = y + chunk.height();
+            while (y < chunkEnd) {
+                if (QSysInfo::ByteOrder == QSysInfo::LittleEndian)
+                    convert32BitOrder(chunk.scanLine(y - chunkStart), width);
+                else
+                    convert32BitOrderBigEndian(chunk.scanLine(y - chunkStart), width);
+
+                if (TIFFWriteScanline(tiff, reinterpret_cast<uint32 *>(chunk.scanLine(y - chunkStart)), y) != 1) {
+                    TIFFClose(tiff);
+                    return false;
+                }
+                ++y;
+            }
+        }
+        TIFFClose(tiff);
+    }
+
+    return true;
+}
+
+QByteArray QTiffHandler::name() const
+{
+    return "tiff";
+}
+
+QVariant QTiffHandler::option(ImageOption option) const
+{
+    if (option == Size && canRead()) {
+        QSize imageSize;
+        qint64 pos = device()->pos();
+        TIFF *tiff = TIFFClientOpen("foo",
+                                    "r",
+                                    const_cast<QTiffHandler*>(this),
+                                    qtiffReadProc,
+                                    qtiffWriteProc,
+                                    qtiffSeekProc,
+                                    qtiffCloseProc,
+                                    qtiffSizeProc,
+                                    qtiffMapProc,
+                                    qtiffUnmapProc);
+
+        if (tiff) {
+            uint32 width = 0;
+            uint32 height = 0;
+            TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &width);
+            TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &height);
+            imageSize = QSize(width, height);
+        }
+        device()->seek(pos);
+        if (imageSize.isValid())
+            return imageSize;
+    } else if (option == CompressionRatio) {
+        return compression;
+    } else if (option == ImageFormat) {
+        return QImage::Format_ARGB32;
+    }
+    return QVariant();
+}
+
+void QTiffHandler::setOption(ImageOption option, const QVariant &value)
+{
+    if (option == CompressionRatio && value.type() == QVariant::Int)
+        compression = value.toInt();
+}
+
+bool QTiffHandler::supportsOption(ImageOption option) const
+{
+    return option == CompressionRatio
+            || option == Size
+            || option == ImageFormat;
+}
+
+void QTiffHandler::convert32BitOrder(void *buffer, int width)
+{
+    uint32 *target = reinterpret_cast<uint32 *>(buffer);
+    for (int32 x=0; x<width; ++x) {
+        uint32 p = target[x];
+        // convert between ARGB and ABGR
+        target[x] = (p & 0xff000000)
+                    | ((p & 0x00ff0000) >> 16)
+                    | (p & 0x0000ff00)
+                    | ((p & 0x000000ff) << 16);
+    }
+}
+
+void QTiffHandler::convert32BitOrderBigEndian(void *buffer, int width)
+{
+    uint32 *target = reinterpret_cast<uint32 *>(buffer);
+    for (int32 x=0; x<width; ++x) {
+        uint32 p = target[x];
+        target[x] = (p & 0xff000000) >> 24
+                    | (p & 0x00ff0000) << 8
+                    | (p & 0x0000ff00) << 8
+                    | (p & 0x000000ff) << 8;
+    }
+}
+
+QT_END_NAMESPACE
diff --git a/src/gui/image/qtiffhandler.h b/src/gui/image/qtiffhandler.h
new file mode 100644
index 0000000..4534ed5
--- /dev/null
+++ b/src/gui/image/qtiffhandler.h
@@ -0,0 +1,78 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTIFFHANDLER_H
+#define QTIFFHANDLER_H
+
+#include <QtGui/qimageiohandler.h>
+
+QT_BEGIN_NAMESPACE
+
+class QTiffHandler : public QImageIOHandler
+{
+public:
+    QTiffHandler();
+
+    bool canRead() const;
+    bool read(QImage *image);
+    bool write(const QImage &image);
+
+    QByteArray name() const;
+
+    static bool canRead(QIODevice *device);
+
+    QVariant option(ImageOption option) const;
+    void setOption(ImageOption option, const QVariant &value);
+    bool supportsOption(ImageOption option) const;
+
+    enum Compression {
+        NoCompression = 0,
+        LzwCompression = 1
+    };
+private:
+    void convert32BitOrder(void *buffer, int width);
+    void convert32BitOrderBigEndian(void *buffer, int width);
+    int compression;
+};
+
+QT_END_NAMESPACE
+
+#endif // QTIFFHANDLER_H
diff --git a/src/gui/image/qtiffhandler.pri b/src/gui/image/qtiffhandler.pri
new file mode 100644
index 0000000..8ac70d9
--- /dev/null
+++ b/src/gui/image/qtiffhandler.pri
@@ -0,0 +1,10 @@
+# common to plugin and built-in forms
+INCLUDEPATH *= $$PWD
+HEADERS += $$PWD/qtiffhandler.h
+SOURCES += $$PWD/qtiffhandler.cpp
+contains(QT_CONFIG, system-tiff) {
+        if(unix|win32-g++*):LIBS += -ltiff
+        else:win32:         LIBS += libtiff.lib
+} else {
+    include($$PWD/../../3rdparty/libtiff.pri)
+}