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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qsgcompressedatlastexture_p.h"
#include <QtCore/QVarLengthArray>
#include <QtCore/QElapsedTimer>
#include <QtCore/QtMath>
#include <QtGui/QOpenGLContext>
#include <QtGui/QGuiApplication>
#include <QtGui/QScreen>
#include <QtGui/QSurface>
#include <QtGui/QWindow>
#include <QtGui/QOpenGLFunctions>
#include <QtGui/QOpenGLTexture>
#include <QDebug>
#include <private/qqmlglobal_p.h>
#include <private/qquickprofiler_p.h>
#include <private/qsgtexture_p.h>
#include <private/qsgcompressedtexture_p.h>
QT_BEGIN_NAMESPACE
static QElapsedTimer qsg_renderer_timer;
namespace QSGCompressedAtlasTexture
{
Atlas::Atlas(const QSize &size, uint format)
: QSGOpenGLAtlasTexture::AtlasBase(size)
, m_format(format)
{
}
Atlas::~Atlas()
{
}
Texture *Atlas::create(const QByteArray &data, int dataLength, int dataOffset, const QSize &size, const QSize &paddedSize)
{
// No need to lock, as manager already locked it.
QRect rect = m_allocator.allocate(paddedSize);
if (rect.width() > 0 && rect.height() > 0) {
Texture *t = new Texture(this, rect, data, dataLength, dataOffset, size);
m_pending_uploads << t;
return t;
}
return nullptr;
}
void Atlas::generateTexture()
{
QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();
funcs->glCompressedTexImage2D(GL_TEXTURE_2D, 0, m_format,
m_size.width(), m_size.height(), 0,
(m_size.width() * m_size.height()) / 2,
nullptr);
}
void Atlas::uploadPendingTexture(int i)
{
Texture *texture = static_cast<Texture*>(m_pending_uploads.at(i));
const QRect &r = texture->atlasSubRect();
QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();
funcs->glCompressedTexSubImage2D(GL_TEXTURE_2D, 0,
r.x(), r.y(), r.width(), r.height(), m_format,
texture->sizeInBytes(),
texture->data().constData() + texture->dataOffset());
qCDebug(QSG_LOG_TIME_TEXTURE).nospace() << "compressed atlastexture uploaded in: " << qsg_renderer_timer.elapsed()
<< "ms (" << texture->textureSize().width() << "x"
<< texture->textureSize().height() << ")";
// TODO: consider releasing the data (as is done in the regular atlas)?
// The advantage of keeping this data around is that it makes it much easier
// to remove the texture from the atlas
}
Texture::Texture(Atlas *atlas, const QRect &textureRect, const QByteArray &data, int dataLength, int dataOffset, const QSize &size)
: QSGOpenGLAtlasTexture::TextureBase(atlas, textureRect)
, m_nonatlas_texture(nullptr)
, m_data(data)
, m_size(size)
, m_dataLength(dataLength)
, m_dataOffset(dataOffset)
{
float w = atlas->size().width();
float h = atlas->size().height();
QRect nopad = atlasSubRect();
// offset by half-pixel to prevent bleeding when scaling
m_texture_coords_rect = QRectF((nopad.x() + .5) / w,
(nopad.y() + .5) / h,
(nopad.width() - 1.) / w,
(nopad.height() - 1.) / h);
}
Texture::~Texture()
{
delete m_nonatlas_texture;
}
bool Texture::hasAlphaChannel() const
{
return QSGCompressedTexture::formatIsOpaque(static_cast<Atlas*>(m_atlas)->format());
}
QSGTexture *Texture::removedFromAtlas() const
{
if (m_nonatlas_texture) {
m_nonatlas_texture->setMipmapFiltering(mipmapFiltering());
m_nonatlas_texture->setFiltering(filtering());
return m_nonatlas_texture;
}
if (!m_data.isEmpty()) {
QTextureFileData texData;
texData.setData(m_data);
texData.setSize(m_size);
texData.setGLInternalFormat(static_cast<Atlas*>(m_atlas)->format());
texData.setDataLength(m_dataLength);
texData.setDataOffset(m_dataOffset);
m_nonatlas_texture = new QSGCompressedTexture(texData);
m_nonatlas_texture->setMipmapFiltering(mipmapFiltering());
m_nonatlas_texture->setFiltering(filtering());
}
return m_nonatlas_texture;
}
}
QT_END_NAMESPACE
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