C++ TexturePtr::freeInternalResources方法代码示例

void EC_ChatBubble::Refresh()
{
    if (renderer_.expired() || !billboardSet_ || !billboard_)
        return;

    // If no messages in the log, hide the chat bubble.
    if (messages_.isEmpty())
    {
        billboardSet_->setVisible(false);
        return;
    }
    else
        billboardSet_->setVisible(true);

    // Get image buffer and texture
    QImage buffer = GetChatBubblePixmap().toImage();
    Ogre::TexturePtr texture = Ogre::TextureManager::getSingleton().getByName(texture_name_);
    if (buffer.isNull() || texture.isNull())
        return;

    // Check texture size
    if ((int)texture->getWidth() != buffer.width() || (int)texture->getHeight() != buffer.height())
    {
        texture->freeInternalResources();
        texture->setWidth(buffer.width());
        texture->setHeight(buffer.height());
        texture->createInternalResources();
    }

    // Update texture buffer
    Ogre::Box update_box(0,0, buffer.width(), buffer.height());
    Ogre::PixelBox pixel_box(update_box, Ogre::PF_A8R8G8B8, (void*)buffer.bits());
    if (!texture->getBuffer().isNull())
        texture->getBuffer()->blitFromMemory(pixel_box, update_box);
}

void RenderWindow::Resize(int width, int height)
{
    renderWindow->resize(width, height);
    renderWindow->windowMovedOrResized();

    if (Ogre::TextureManager::getSingletonPtr() && Ogre::OverlayManager::getSingletonPtr())
    {
        PROFILE(RenderWindow_Resize);

        // recenter the overlay
//        int left = (renderWindow->getWidth() - width) / 2;
//        int top = (renderWindow->getHeight() - height) / 2;

        // resize the container
 //       overlayContainer->setDimensions(width, height);
  //      overlayContainer->setPosition(left, top);
        overlayContainer->setDimensions((Ogre::Real)width, (Ogre::Real)height);
        overlayContainer->setPosition(0,0);

        // resize the backing texture
        Ogre::TextureManager &mgr = Ogre::TextureManager::getSingleton();
        Ogre::TexturePtr texture = mgr.getByName(rttTextureName);
        assert(texture.get());

        texture->freeInternalResources();
        texture->setWidth(width);
        texture->setHeight(height);
        texture->createInternalResources();
    }
}

    void QOgreWorldView::ResizeOverlay(int width, int height)
    {
        if (Ogre::TextureManager::getSingletonPtr() && Ogre::OverlayManager::getSingletonPtr())
        {
            PROFILE(QOgreWorldView_ResizeOverlay);
            
            // recenter the overlay
            int left = (win_->getWidth() - width) / 2;
            int top = (win_->getHeight() - height) / 2;

            // resize the container
            ui_overlay_container_->setDimensions(width, height);
            ui_overlay_container_->setPosition(left, top);

            // resize the backing texture
            Ogre::TextureManager &mgr = Ogre::TextureManager::getSingleton();
            Ogre::TexturePtr texture = mgr.getByName(texture_name_);
            assert(texture.get());

            texture->freeInternalResources();
            texture->setWidth(width);
            texture->setHeight(height);
            texture->createInternalResources();
        }
    }

void EC_WidgetCanvas::Update()
{
    if (framework->IsHeadless())
        return;

    if (!widget_.data() || texture_name_.empty())
        return;
    if (widget_->width() <= 0 || widget_->height() <= 0)
        return;

    try
    {
        Ogre::TexturePtr texture = Ogre::TextureManager::getSingleton().getByName(texture_name_);
        if (texture.isNull())
            return;

        if (buffer_.size() != widget_->size())
            buffer_ = QImage(widget_->size(), QImage::Format_ARGB32_Premultiplied);
        if (buffer_.width() <= 0 || buffer_.height() <= 0)
            return;

        QPainter painter(&buffer_);
        widget_->render(&painter);

        // Set texture to material
        if (update_internals_ && !material_name_.empty())
        {
            Ogre::MaterialPtr material = Ogre::MaterialManager::getSingleton().getByName(material_name_);
            if (material.isNull())
                return;
            // Just for good measure, this is done once in the ctor already if everything went well.
            OgreRenderer::SetTextureUnitOnMaterial(material, texture_name_);
            UpdateSubmeshes();
            update_internals_ = false;
        }

        if ((int)texture->getWidth() != buffer_.width() || (int)texture->getHeight() != buffer_.height())
        {
            texture->freeInternalResources();
            texture->setWidth(buffer_.width());
            texture->setHeight(buffer_.height());
            texture->createInternalResources();
        }

        Blit(buffer_, texture);
    }
    catch (Ogre::Exception &e) // inherits std::exception
    {
        LogError("Exception occurred while blitting texture data from memory: " + std::string(e.what()));
    }
    catch (...)
    {
        LogError("Unknown exception occurred while blitting texture data from memory.");
    }
}