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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D 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 "rendertexture.h"
#include <QDebug>
#include <QOpenGLTexture>
#include <QOpenGLPixelTransferOptions>
#include <texturedata.h>
namespace Qt3D {
RenderTexture::RenderTexture(Texture* peer) :
m_peer(peer),
m_gl(NULL)
{
}
QOpenGLTexture *RenderTexture::getOrCreateGLTexture()
{
if (m_gl)
return m_gl;
m_gl = buildGLTexture();
m_gl->allocateStorage();
if (!m_gl->isStorageAllocated()) {
qWarning() << Q_FUNC_INFO << "texture storage allocation failed";
return NULL;
}
foreach (TexImageDataPtr imgData, m_peer->imageData()) {
setToGLTexture(imgData);
} // of image data in texture iteration
if (m_peer->generateMipMaps()) {
m_gl->generateMipMaps();
}
int err = glGetError();
if (err)
qWarning() << Q_FUNC_INFO <<
"GL error after generating mip-maps" << QString::number(err, 16);
return m_gl;
}
QOpenGLTexture *RenderTexture::buildGLTexture()
{
QOpenGLTexture* glTex = new QOpenGLTexture(m_peer->target());
glTex->setFormat(m_peer->format());
glTex->setSize(m_peer->width(),
m_peer->height(),
m_peer->depth());
if (!glTex->create()) {
qWarning() << Q_FUNC_INFO << "creating QOpenGLTexture failed";
return NULL;
}
glTex->setWrapMode(m_peer->wrapMode());
glTex->setMinMagFilters(m_peer->minificationFilter(),
m_peer->magnificationFilter());
// FIXME : make this conditional on Qt version
// work-around issue in QOpenGLTexture DSA emulaation which rasies
// an Invalid Enum error
glGetError();
return glTex;
}
void RenderTexture::setToGLTexture(TexImageDataPtr imgData)
{
Q_ASSERT(m_gl && m_gl->isCreated() && m_gl->isStorageAllocated());
// ensure we don't accidently cause a detach / copy of the raw bytes
const QByteArray& bytes(imgData->data());
char* rawPtr = const_cast<char*>(bytes.constData());
if (imgData->isCompressed()) {
m_gl->setCompressedData(imgData->mipMapLevel(),
imgData->layer(),
imgData->cubeFace(),
bytes.size(),
rawPtr);
} else {
QOpenGLPixelTransferOptions uploadOptions;
uploadOptions.setAlignment(1);
m_gl->setData(imgData->mipMapLevel(),
imgData->layer(),
imgData->cubeFace(),
imgData->pixelFormat(),
imgData->pixelType(),
rawPtr,
&uploadOptions);
}
// FIXME : make this conditional on Qt version
// work-around issue in QOpenGLTexture DSA emulaation which rasies
// an Invalid Enum error
glGetError();
}
GLint RenderTexture::textureId()
{
return getOrCreateGLTexture()->textureId();
}
} // namespace Qt3D
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