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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "mapnode_p.h"
#include "qgeomap_p.h"
#include <Qt3D/qglpainter.h>
#include <Qt3D/QGLFramebufferObjectSurface>
#include <QtGui/QOpenGLFramebufferObject>
#include <QtQuick/private/qsgtexture_p.h>
#ifndef GL_MULTISAMPLE
#define GL_MULTISAMPLE 0x809D
#endif
MapNode::MapNode(QGeoMap *map): QSGGeometryNode(),
m_fbo(0),
m_fboSurface(0),
m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4),
m_texture(0),
m_map(map),
m_initialized(false),
m_dirtyFBO(false)
{
setMaterial(&m_material);
setOpaqueMaterial(&m_opaqueMaterial);
setGeometry(&m_geometry);
// setFlag(UsePreprocess);
}
MapNode::~MapNode()
{
delete m_fboSurface;
delete m_fbo;
}
void MapNode::saveRenderState()
{
//TODO: implement me
}
void MapNode::restoreRenderState()
{
//TODO: implement me
}
void
MapNode::preprocess()
{
restoreRenderState();
//TODO: implement me , texture update
saveRenderState();
}
void MapNode::update()
{
restoreRenderState();
if (!m_initialized)
init();
if (m_dirtyFBO)
updateFBO();
saveRenderState();
}
void MapNode::updateFBO()
{
QGLPainter painter;
if (!painter.begin()) {
qWarning() << "GL graphics system is not active, can not update FBO for map";
return;
}
painter.pushSurface(m_fboSurface);
glClearColor(0.9, 0.9, 0.9, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
painter.disableEffect();
#ifdef GL_RESCALE_NORMAL
// Scale normals by a scale factor derived from modelview matrix.
// Note: normals need to be unit length.
glEnable(GL_RESCALE_NORMAL);
#endif
#if !defined(QT_OPENGL_ES_2)
glShadeModel(GL_SMOOTH);
glEnable(GL_MULTISAMPLE);
#endif
// Set the default effect for the scene.
painter.setStandardEffect(QGL::LitMaterial);
painter.setFaceColor(QGL::AllFaces, Qt::white);
#if defined(QT_OPENGL_ES)
glClearDepthf(1);
#else
glClearDepth(1);
#endif
#if defined(GL_LINE_SMOOTH) && defined(GL_LINE_SMOOTH_HINT)
glEnable(GL_LINE_SMOOTH);
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
#endif
#ifdef QSGSHADEREFFECTSOURCE_AVAILABLE
// Update any map objects that may have dirty textures
for (int i = 0; i < mapItems_.count(); ++i) {
mapItems_.at(i)->updateItem();
}
#endif
// No stereo rendering, set the eye as neutral
painter.setEye(QGL::NoEye);
// TODO this needs to be figured out (or confirmed as invalid thing).
// Currently applied transforms for this Map3D object - how to get/apply current transforms?
// QTransform transform = painter->combinedTransform();
// Then we get the rectangle that is gotten by applying the QTransform on the rect
// --> this is the viewport for Map3D
// QRect viewport = transform.mapRect(boundingRect()).toRect();
// boundingRect is in local coordinates. We need to map it to the scene coordinates
// in order to render to correct area.
if (m_map->glCamera()) {
painter.setCamera(m_map->glCamera());
} else {
QGLCamera defCamera;
painter.setCamera(&defCamera);
}
m_map->paintGL(&painter);
restoreDefaults(&painter);
// Draw the children items
painter.popSurface();
// QSG does not expect anyone to alter gl context state; restore defaults.
// Default heaps of things, because we cannot be sure what the Qt3D internally
// sets.
#if defined(QT_OPENGL_ES)
glClearDepthf(0);
#else
glClearDepth(0);
#endif
painter.end();
QSGGeometry::updateTexturedRectGeometry(&m_geometry,
QRectF(QPointF(0, m_fbo->size().height()), QPointF(m_fbo->size().width(), 0)),
QRectF(0, 0, 1, 1));
delete m_texture;
m_texture = new QSGPlainTexture();
m_texture->setOwnsTexture(false);
m_texture->setTextureSize(m_fbo->size());
m_texture->setTextureId(m_fbo->texture());
m_opaqueMaterial.setTexture(m_texture);
m_material.setTexture(m_texture);
markDirty(DirtyMaterial);
}
void MapNode::setSize(const QSize &size)
{
if (size == m_size)
return;
m_size = size;
m_dirtyFBO = true;
m_initialized = false;
markDirty(DirtyGeometry);
}
void MapNode::init()
{
delete m_fboSurface;
delete m_fbo;
m_fbo = new QOpenGLFramebufferObject(m_size.width(), m_size.height());
m_fboSurface = new QGLFramebufferObjectSurface(m_fbo);
m_initialized = true;
}
void MapNode::restoreDefaults(QGLPainter *painter)
{
// Disable the effect to return control to the GL paint engine.
painter->disableEffect();
// Try to restore the default options
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
// Set the default depth buffer options.
glDepthFunc(GL_LESS);
glDepthMask(GL_TRUE);
#if defined(QT_OPENGL_ES)
glDepthRangef(0.0f, 1.0f);
#else
glDepthRange(0.0f, 1.0f);
#endif
// Set the default blend options.
glDisable(GL_BLEND);
if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendColor))
painter->glBlendColor(0, 0, 0, 0);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendEquation))
painter->glBlendEquation(GL_FUNC_ADD);
else if (painter->hasOpenGLFeature(QOpenGLFunctions::BlendEquationSeparate))
painter->glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
}
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