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    41 

    42 #include "qgraphicssystem_trace_p.h"

    43 #include <private/qpixmap_raster_p.h>

    44 #include <private/qpaintbuffer_p.h>

    45 #include <private/qwindowsurface_raster_p.h>

    46 

    47 #include <QFile>

    48 #include <QPainter>

    49 #include <QtDebug>

    50 

    51 QT_BEGIN_NAMESPACE

    52 

    53 class QTraceWindowSurface : public QRasterWindowSurface

    54 {

    55 public:

    56     QTraceWindowSurface(QWidget *widget);

    57     ~QTraceWindowSurface();

    58 

    59     QPaintDevice *paintDevice();

    60     void beginPaint(const QRegion &rgn);

    61     void endPaint(const QRegion &rgn);

    62 

    63     bool scroll(const QRegion &area, int dx, int dy);

    64 

    65 private:

    66     QPaintBuffer *buffer;

    67     QList<QRegion> updates;

    68 

    69     qulonglong winId;

    70 };

    71 

    72 QTraceWindowSurface::QTraceWindowSurface(QWidget *widget)

    73     : QRasterWindowSurface(widget)

    74     , buffer(0)

    75     , winId(0)

    76 {

    77 }

    78 

    79 QTraceWindowSurface::~QTraceWindowSurface()

    80 {

    81     if (buffer) {

    82         QFile outputFile(QString(QLatin1String("qtgraphics-%0.trace")).arg(winId));

    83         if (outputFile.open(QIODevice::WriteOnly)) {

    84             QDataStream out(&outputFile);

    85             out << *buffer << updates;

    86         }

    87         delete buffer;

    88     }

    89 }

    90 

    91 QPaintDevice *QTraceWindowSurface::paintDevice()

    92 {

    93     if (!buffer) {

    94         buffer = new QPaintBuffer;

    95         buffer->setBoundingRect(geometry());

    96     }

    97     return buffer;

    98 }

    99 

   100 void QTraceWindowSurface::beginPaint(const QRegion &rgn)

   101 {

   102     // ensure paint buffer is created

   103     paintDevice();

   104     buffer->beginNewFrame();

   105 

   106     QRasterWindowSurface::beginPaint(rgn);

   107 }

   108 

   109 void QTraceWindowSurface::endPaint(const QRegion &rgn)

   110 {

   111     QPainter p(QRasterWindowSurface::paintDevice());

   112     buffer->draw(&p, buffer->numFrames()-1);

   113     p.end();

   114 

   115     winId = (qulonglong)window()->winId();

   116 

   117     updates << rgn;

   118 

   119     QRasterWindowSurface::endPaint(rgn);

   120 }

   121 

   122 bool QTraceWindowSurface::scroll(const QRegion &, int, int)

   123 {

   124     // TODO: scrolling should also be streamed and replayed

   125     // to test scrolling performance

   126     return false;

   127 }

   128 

   129 QTraceGraphicsSystem::QTraceGraphicsSystem()

   130 {

   131 }

   132 

   133 QPixmapData *QTraceGraphicsSystem::createPixmapData(QPixmapData::PixelType type) const

   134 {

   135     return new QRasterPixmapData(type);

   136 }

   137 

   138 QWindowSurface *QTraceGraphicsSystem::createWindowSurface(QWidget *widget) const

   139 {

   140     return new QTraceWindowSurface(widget);

   141 }

   142 

   143 QT_END_NAMESPACE