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// Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QT3DEXTRAS_QTEXTUREATLAS_P_P_H
#define QT3DEXTRAS_QTEXTUREATLAS_P_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qscopedpointer.h>
#include <Qt3DRender/private/qabstracttexture_p.h>
#include <Qt3DRender/private/qtexturegenerator_p.h>
#include <Qt3DExtras/private/areaallocator_p.h>
#include <Qt3DExtras/private/qtextureatlas_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DExtras {
// Used to store texture info within atlas
struct AtlasTexture
{
QRect position;
int padding = 0;
};
// data shared between QTextureAtlasPrivate and the QTextureGenerators
// we use this extra indirection so we can lazily copy the sub-images
// into the actual texture image in the backend texture loader thread.
class QTextureAtlasData
{
public:
QTextureAtlasData(int w, int h, QImage::Format fmt);
~QTextureAtlasData();
int width() const { return m_image.width(); }
int height() const { return m_image.height(); }
void addImage(const AtlasTexture &texture, const QImage &image);
QByteArray createUpdatedImageData();
private:
struct Update {
AtlasTexture textureInfo;
QImage image;
};
QMutex m_mutex;
QImage m_image;
QList<Update> m_updates;
};
typedef QSharedPointer<QTextureAtlasData> QTextureAtlasDataPtr;
class QTextureAtlasPrivate : public Qt3DRender::QAbstractTexturePrivate
{
public:
QTextureAtlasPrivate();
~QTextureAtlasPrivate();
Q_DECLARE_PUBLIC(QTextureAtlas)
QTextureAtlas::TextureId m_currId = 1; // IDs for new sub-textures
int m_currGen = 0;
QTextureAtlasDataPtr m_data;
QScopedPointer<AreaAllocator> m_allocator;
QOpenGLTexture::PixelFormat m_pixelFormat;
QHash<QTextureAtlas::TextureId, AtlasTexture> m_textures;
};
class QTextureAtlasGenerator : public Qt3DRender::QTextureGenerator
{
public:
QTextureAtlasGenerator(const QTextureAtlasPrivate *texAtlas);
~QTextureAtlasGenerator();
Qt3DRender::QTextureDataPtr operator()() override;
bool operator==(const QTextureGenerator &other) const override;
QT3D_FUNCTOR(QTextureAtlasGenerator)
private:
QTextureAtlasDataPtr m_data;
Qt3DRender::QAbstractTexture::TextureFormat m_format;
QOpenGLTexture::PixelFormat m_pixelFormat;
int m_generation;
Qt3DCore::QNodeId m_atlasId;
};
typedef QSharedPointer<QTextureAtlasGenerator> QTextureAtlasGeneratorPtr;
} // namespace Qt3DExtras
QT_END_NAMESPACE
#endif // QT3DEXTRAS_QTEXTUREATLAS_P_P_H
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