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/****************************************************************************
**
** Copyright (C) 2016 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSGATLASTEXTURE_P_H
#define QSGATLASTEXTURE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/QSize>
#include <QtGui/qopengl.h>
#include <QtQuick/QSGTexture>
#include <QtQuick/private/qsgtexture_p.h>
#include <QtQuick/private/qsgareaallocator_p.h>
QT_BEGIN_NAMESPACE
namespace QSGAtlasTexture
{
class Texture;
class Atlas;
class Manager : public QObject
{
Q_OBJECT
public:
Manager();
~Manager();
QSGTexture *create(const QImage &image, bool hasAlphaChannel);
void invalidate();
private:
Atlas *m_atlas;
QSize m_atlas_size;
int m_atlas_size_limit;
};
class Atlas : public QObject
{
public:
Atlas(const QSize &size);
~Atlas();
void invalidate();
int textureId() const;
void bind(QSGTexture::Filtering filtering);
void upload(Texture *texture);
void uploadBgra(Texture *texture);
Texture *create(const QImage &image);
void remove(Texture *t);
QSize size() const { return m_size; }
uint internalFormat() const { return m_internalFormat; }
uint externalFormat() const { return m_externalFormat; }
private:
QSGAreaAllocator m_allocator;
unsigned int m_texture_id;
QSize m_size;
QList<Texture *> m_pending_uploads;
uint m_internalFormat;
uint m_externalFormat;
int m_atlas_transient_image_threshold;
uint m_allocated : 1;
uint m_use_bgra_fallback: 1;
uint m_debug_overlay : 1;
};
class Texture : public QSGTexture
{
Q_OBJECT
public:
Texture(Atlas *atlas, const QRect &textureRect, const QImage &image);
~Texture();
int textureId() const override { return m_atlas->textureId(); }
QSize textureSize() const override { return atlasSubRectWithoutPadding().size(); }
void setHasAlphaChannel(bool alpha) { m_has_alpha = alpha; }
bool hasAlphaChannel() const override { return m_has_alpha; }
bool hasMipmaps() const override { return false; }
bool isAtlasTexture() const override { return true; }
QRectF normalizedTextureSubRect() const override { return m_texture_coords_rect; }
QRect atlasSubRect() const { return m_allocated_rect; }
QRect atlasSubRectWithoutPadding() const { return m_allocated_rect.adjusted(1, 1, -1, -1); }
bool isTexture() const { return true; }
QSGTexture *removedFromAtlas() const override;
void releaseImage() { m_image = QImage(); }
const QImage &image() const { return m_image; }
void bind() override;
private:
QRect m_allocated_rect;
QRectF m_texture_coords_rect;
QImage m_image;
Atlas *m_atlas;
mutable QSGPlainTexture *m_nonatlas_texture;
uint m_has_alpha : 1;
};
}
QT_END_NAMESPACE
#endif
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