source: trunk/src/openvg/qpixmapdata_vg.cpp@ 1023

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation ([email protected])
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** This file is part of the QtOpenVG module of the Qt Toolkit.
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#include "qpixmapdata_vg_p.h"
#include "qpaintengine_vg_p.h"
#include <QtGui/private/qdrawhelper_p.h>
#if !defined(QT_NO_EGL)
#include <QtGui/private/qegl_p.h>
#endif
#include "qvg_p.h"
#include "qvgimagepool_p.h"
#include <QBuffer>
#include <QImageReader>
#include <QtGui/private/qimage_p.h>

QT_BEGIN_NAMESPACE

static int qt_vg_pixmap_serial = 0;

QVGPixmapData::QVGPixmapData(PixelType type)
    : QPixmapData(type, OpenVGClass)
{
    Q_ASSERT(type == QPixmapData::PixmapType);
    vgImage = VG_INVALID_HANDLE;
    vgImageOpacity = VG_INVALID_HANDLE;
    cachedOpacity = 1.0f;
    recreate = true;
    inImagePool = false;
    inLRU = false;
    failedToAlloc = false;
#if !defined(QT_NO_EGL)
    context = 0;
    qt_vg_register_pixmap(this);
#endif
    setSerialNumber(++qt_vg_pixmap_serial);
}

QVGPixmapData::~QVGPixmapData()
{
    destroyImageAndContext();
#if !defined(QT_NO_EGL)
    qt_vg_unregister_pixmap(this);
#endif
}

void QVGPixmapData::destroyImages()
{
    if (inImagePool) {
        QVGImagePool *pool = QVGImagePool::instance();
        if (vgImage != VG_INVALID_HANDLE)
            pool->releaseImage(this, vgImage);
        if (vgImageOpacity != VG_INVALID_HANDLE)
            pool->releaseImage(this, vgImageOpacity);
    } else {
        if (vgImage != VG_INVALID_HANDLE)
            vgDestroyImage(vgImage);
        if (vgImageOpacity != VG_INVALID_HANDLE)
            vgDestroyImage(vgImageOpacity);
    }
    vgImage = VG_INVALID_HANDLE;
    vgImageOpacity = VG_INVALID_HANDLE;
    inImagePool = false;
}

void QVGPixmapData::destroyImageAndContext()
{
    if (vgImage != VG_INVALID_HANDLE) {
        // We need to have a context current to destroy the image.
#if !defined(QT_NO_EGL)
        if (context->isCurrent()) {
            destroyImages();
        } else {
            // We don't currently have a widget surface active, but we
            // need a surface to make the context current.  So use the
            // shared pbuffer surface instead.
            context->makeCurrent(qt_vg_shared_surface());
            destroyImages();
            context->lazyDoneCurrent();
        }
#else
        destroyImages();
#endif
    }
#if !defined(QT_NO_EGL)
    if (context) {
        qt_vg_destroy_context(context, QInternal::Pixmap);
        context = 0;
    }
#endif
    recreate = true;
}

QPixmapData *QVGPixmapData::createCompatiblePixmapData() const
{
    return new QVGPixmapData(pixelType());
}

bool QVGPixmapData::isValid() const
{
    return (w > 0 && h > 0);
}

void QVGPixmapData::resize(int wid, int ht)
{
    if (w == wid && h == ht)
        return;

    w = wid;
    h = ht;
    d = 32; // We always use ARGB_Premultiplied for VG pixmaps.
    is_null = (w <= 0 || h <= 0);
    source = QImage();
    recreate = true;

    setSerialNumber(++qt_vg_pixmap_serial);
}

void QVGPixmapData::fromImage
        (const QImage &image, Qt::ImageConversionFlags flags)
{
    if(image.isNull())
        return;

    QImage img = image;
    createPixmapForImage(img, flags, false);