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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the Qt SceneGraph Raster Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
****************************************************************************/
#include "softwarelayer.h"
#include "context.h"
SoftwareLayer::SoftwareLayer(QSGRenderContext *renderContext)
: m_item(0)
, m_context(renderContext)
, m_renderer(0)
, m_device_pixel_ratio(1)
, m_live(true)
, m_grab(true)
, m_recursive(false)
, m_dirtyTexture(true)
{
}
SoftwareLayer::~SoftwareLayer()
{
invalidated();
}
int SoftwareLayer::textureId() const
{
return 0;
}
QSize SoftwareLayer::textureSize() const
{
return m_pixmap.size();
}
bool SoftwareLayer::hasAlphaChannel() const
{
return m_pixmap.hasAlphaChannel();
}
bool SoftwareLayer::hasMipmaps() const
{
return false;
}
void SoftwareLayer::bind()
{
}
bool SoftwareLayer::updateTexture()
{
bool doGrab = (m_live || m_grab) && m_dirtyTexture;
if (doGrab)
grab();
if (m_grab)
emit scheduledUpdateCompleted();
m_grab = false;
return doGrab;
}
void SoftwareLayer::setItem(QSGNode *item)
{
if (item == m_item)
return;
m_item = item;
if (m_live && !m_item)
m_pixmap = QPixmap();
markDirtyTexture();
}
void SoftwareLayer::setRect(const QRectF &rect)
{
if (rect == m_rect)
return;
m_rect = rect;
markDirtyTexture();
}
void SoftwareLayer::setSize(const QSize &size)
{
if (size == m_size)
return;
m_size = size;
if (m_live && m_size.isNull())
m_pixmap = QPixmap();
markDirtyTexture();
}
void SoftwareLayer::scheduleUpdate()
{
if (m_grab)
return;
m_grab = true;
if (m_dirtyTexture) {
emit updateRequested();
}
}
QImage SoftwareLayer::toImage() const
{
return m_pixmap.toImage();
}
void SoftwareLayer::setLive(bool live)
{
if (live == m_live)
return;
m_live = live;
if (m_live && (!m_item || m_size.isNull()))
m_pixmap = QPixmap();
markDirtyTexture();
}
void SoftwareLayer::setRecursive(bool recursive)
{
m_recursive = recursive;
}
void SoftwareLayer::setFormat(GLenum)
{
}
void SoftwareLayer::setHasMipmaps(bool)
{
}
void SoftwareLayer::setDevicePixelRatio(qreal ratio)
{
m_device_pixel_ratio = ratio;
}
void SoftwareLayer::markDirtyTexture()
{
m_dirtyTexture = true;
if (m_live || m_grab) {
emit updateRequested();
}
}
void SoftwareLayer::invalidated()
{
delete m_renderer;
m_renderer = 0;
}
void SoftwareLayer::grab()
{
if (!m_item || m_size.isNull()) {
m_pixmap = QPixmap();
m_dirtyTexture = false;
return;
}
QSGNode *root = m_item;
while (root->firstChild() && root->type() != QSGNode::RootNodeType)
root = root->firstChild();
if (root->type() != QSGNode::RootNodeType)
return;
if (!m_renderer) {
m_renderer = new SoftwareContext::PixmapRenderer(m_context);
connect(m_renderer, SIGNAL(sceneGraphChanged()), this, SLOT(markDirtyTexture()));
}
m_renderer->setDevicePixelRatio(m_device_pixel_ratio);
m_renderer->setRootNode(static_cast<QSGRootNode *>(root));
if (m_pixmap.size() != m_size)
m_pixmap = QPixmap(m_size);
// Render texture.
root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip and opacity update.
m_renderer->nodeChanged(root, QSGNode::DirtyForceUpdate); // Force render list update.
m_dirtyTexture = false;
m_renderer->setDeviceRect(m_size);
m_renderer->setViewportRect(m_size);
m_renderer->setClearColor(Qt::transparent);
m_renderer->renderScene();
m_renderer->render(&m_pixmap);
root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip, opacity and render list update.
if (m_recursive)
markDirtyTexture(); // Continuously update if 'live' and 'recursive'.
}
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