VGImage QVGPixmapData::toVGImage()
{
if (!isValid() || failedToAlloc)
return VG_INVALID_HANDLE;
#if !defined(QT_NO_EGL)
// Increase the reference count on the shared context.
if (!context)
context = qt_vg_create_context(0, QInternal::Pixmap);
#endif
if (recreate && prevSize != QSize(w, h))
destroyImages();
else if (recreate)
cachedOpacity = -1.0f; // Force opacity image to be refreshed later.
#if defined(Q_OS_SYMBIAN)
if (recreate && nativeImageHandleProvider && !nativeImageHandle) {
createFromNativeImageHandleProvider();
}
#endif
if (vgImage == VG_INVALID_HANDLE) {
vgImage = QVGImagePool::instance()->createImageForPixmap
(qt_vg_image_to_vg_format(source.format()), w, h, VG_IMAGE_QUALITY_FASTER, this);
// Bail out if we run out of GPU memory - try again next time.
if (vgImage == VG_INVALID_HANDLE) {
failedToAlloc = true;
return VG_INVALID_HANDLE;
}
inImagePool = true;
} else if (inImagePool) {
QVGImagePool::instance()->useImage(this);
}
if (!source.isNull() && recreate) {
source.beginDataAccess();
vgImageSubData
(vgImage,
source.constBits(), source.bytesPerLine(),
qt_vg_image_to_vg_format(source.format()), 0, 0, w, h);
source.endDataAccess(true);
}
recreate = false;
prevSize = QSize(w, h);
return vgImage;
}
void QVGPixmapData::ensureReadback(bool readOnly) const
{
if (vgImage != VG_INVALID_HANDLE && source.isNull()) {
source = QVolatileImage(w, h, sourceFormat());
source.beginDataAccess();
vgGetImageSubData(vgImage, source.bits(), source.bytesPerLine(),
qt_vg_image_to_vg_format(source.format()),
0, 0, w, h);
source.endDataAccess();
if (readOnly) {
recreate = false;
} else {
// Once we did a readback, the original VGImage must be destroyed
// because it may be shared (e.g. created via SgImage) and a subsequent
// upload of the image data may produce unexpected results.
const_cast<QVGPixmapData *>(this)->destroyImages();
#if defined(Q_OS_SYMBIAN)
// There is now an own copy of the data so drop the handle provider,
// otherwise toVGImage() would request the handle again, which is wrong.
nativeImageHandleProvider = 0;
#endif
recreate = true;
}
}
}
QT_BEGIN_NAMESPACE
// Turn off "direct to window" rendering if EGL cannot support it.
#if !defined(EGL_RENDER_BUFFER) || !defined(EGL_SINGLE_BUFFER)
#if defined(QVG_DIRECT_TO_WINDOW)
#undef QVG_DIRECT_TO_WINDOW
#endif
#endif
// Determine if preserved window contents should be used.
#if !defined(EGL_SWAP_BEHAVIOR) || !defined(EGL_BUFFER_PRESERVED)
#if !defined(QVG_NO_PRESERVED_SWAP)
#define QVG_NO_PRESERVED_SWAP 1
#endif
#endif
VGImageFormat qt_vg_config_to_vg_format(QEglContext *context)
{
return qt_vg_image_to_vg_format
(qt_vg_config_to_image_format(context));
}
