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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#ifndef QSGRHIATLASTEXTURE_P_H
#define QSGRHIATLASTEXTURE_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 <QtQuick/private/qsgplaintexture_p.h>
#include <QtQuick/private/qsgareaallocator_p.h>
#include <QtGui/QSurface>
#include <QtGui/private/qrhi_p.h>
QT_BEGIN_NAMESPACE
class QSGDefaultRenderContext;
namespace QSGCompressedAtlasTexture {
class Atlas;
}
class QSGCompressedTextureFactory;
namespace QSGRhiAtlasTexture
{
class Texture;
class TextureBase;
class TextureBasePrivate;
class Atlas;
class Manager : public QObject
{
Q_OBJECT
public:
Manager(QSGDefaultRenderContext *rc, const QSize &surfacePixelSize, QSurface *maybeSurface);
~Manager();
QSGTexture *create(const QImage &image, bool hasAlphaChannel);
QSGTexture *create(const QSGCompressedTextureFactory *factory);
void invalidate();
private:
QSGDefaultRenderContext *m_rc;
QRhi *m_rhi;
Atlas *m_atlas = nullptr;
// set of atlases for different compressed formats
QHash<unsigned int, QSGCompressedAtlasTexture::Atlas*> m_atlases;
QSize m_atlas_size;
int m_atlas_size_limit;
};
class AtlasBase : public QObject
{
Q_OBJECT
public:
AtlasBase(QSGDefaultRenderContext *rc, const QSize &size);
~AtlasBase();
void invalidate();
void updateRhiTexture(QRhiResourceUpdateBatch *resourceUpdates);
void remove(TextureBase *t);
QSGDefaultRenderContext *renderContext() const { return m_rc; }
QRhi *rhi() const { return m_rhi; }
QRhiTexture *texture() const { return m_texture; }
QSize size() const { return m_size; }
protected:
virtual bool generateTexture() = 0;
virtual void enqueueTextureUpload(TextureBase *t, QRhiResourceUpdateBatch *resourceUpdates) = 0;
protected:
QSGDefaultRenderContext *m_rc;
QRhi *m_rhi;
QSGAreaAllocator m_allocator;
QRhiTexture *m_texture = nullptr;
QSize m_size;
QVector<TextureBase *> m_pending_uploads;
friend class TextureBase;
friend class TextureBasePrivate;
private:
bool m_allocated = false;
};
class Atlas : public AtlasBase
{
public:
Atlas(QSGDefaultRenderContext *rc, const QSize &size);
~Atlas();
bool generateTexture() override;
void enqueueTextureUpload(TextureBase *t, QRhiResourceUpdateBatch *resourceUpdates) override;
Texture *create(const QImage &image);
QRhiTexture::Format format() const { return m_format; }
private:
QRhiTexture::Format m_format;
int m_atlas_transient_image_threshold = 0;
uint m_debug_overlay : 1;
};
class TextureBase : public QSGTexture
{
Q_DECLARE_PRIVATE(TextureBase)
Q_OBJECT
public:
TextureBase(AtlasBase *atlas, const QRect &textureRect);
~TextureBase();
int textureId() const override { return 0; } // not used
void bind() override { } // not used
bool isAtlasTexture() const override { return true; }
QRect atlasSubRect() const { return m_allocated_rect; }
QRhiResourceUpdateBatch *workResourceUpdateBatch() const;
protected:
QRect m_allocated_rect;
AtlasBase *m_atlas;
};
class TextureBasePrivate : public QSGTexturePrivate
{
Q_DECLARE_PUBLIC(TextureBase)
public:
int comparisonKey() const override;
QRhiTexture *rhiTexture() const override;
void updateRhiTexture(QRhi *rhi, QRhiResourceUpdateBatch *resourceUpdates) override;
};
class Texture : public TextureBase
{
Q_OBJECT
public:
Texture(Atlas *atlas, const QRect &textureRect, const QImage &image);
~Texture();
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; }
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); }
QSGTexture *removedFromAtlas() const override;
void releaseImage() { m_image = QImage(); }
const QImage &image() const { return m_image; }
private:
QRectF m_texture_coords_rect;
QImage m_image;
mutable QSGPlainTexture *m_nonatlas_texture = nullptr;
bool m_has_alpha;
};
}
QT_END_NAMESPACE
#endif
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