| 1 | // Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB). |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #ifndef QT3DEXTRAS_QTEXTUREATLAS_P_P_H |
| 5 | #define QT3DEXTRAS_QTEXTUREATLAS_P_P_H |
| 6 | |
| 7 | // |
| 8 | // W A R N I N G |
| 9 | // ------------- |
| 10 | // |
| 11 | // This file is not part of the Qt API. It exists for the convenience |
| 12 | // of other Qt classes. This header file may change from version to |
| 13 | // version without notice, or even be removed. |
| 14 | // |
| 15 | // We mean it. |
| 16 | // |
| 17 | |
| 18 | #include <QtCore/qscopedpointer.h> |
| 19 | #include <Qt3DRender/private/qabstracttexture_p.h> |
| 20 | #include <Qt3DRender/private/qtexturegenerator_p.h> |
| 21 | #include <Qt3DExtras/private/areaallocator_p.h> |
| 22 | #include <Qt3DExtras/private/qtextureatlas_p.h> |
| 23 | |
| 24 | QT_BEGIN_NAMESPACE |
| 25 | |
| 26 | namespace Qt3DExtras { |
| 27 | |
| 28 | // Used to store texture info within atlas |
| 29 | struct AtlasTexture |
| 30 | { |
| 31 | QRect position; |
| 32 | int padding = 0; |
| 33 | }; |
| 34 | |
| 35 | // data shared between QTextureAtlasPrivate and the QTextureGenerators |
| 36 | // we use this extra indirection so we can lazily copy the sub-images |
| 37 | // into the actual texture image in the backend texture loader thread. |
| 38 | class QTextureAtlasData |
| 39 | { |
| 40 | public: |
| 41 | QTextureAtlasData(int w, int h, QImage::Format fmt); |
| 42 | ~QTextureAtlasData(); |
| 43 | |
| 44 | int width() const { return m_image.width(); } |
| 45 | int height() const { return m_image.height(); } |
| 46 | |
| 47 | void addImage(const AtlasTexture &texture, const QImage &image); |
| 48 | QByteArray createUpdatedImageData(); |
| 49 | |
| 50 | private: |
| 51 | struct Update { |
| 52 | AtlasTexture textureInfo; |
| 53 | QImage image; |
| 54 | }; |
| 55 | |
| 56 | QMutex m_mutex; |
| 57 | QImage m_image; |
| 58 | QList<Update> m_updates; |
| 59 | }; |
| 60 | |
| 61 | typedef QSharedPointer<QTextureAtlasData> QTextureAtlasDataPtr; |
| 62 | |
| 63 | class QTextureAtlasPrivate : public Qt3DRender::QAbstractTexturePrivate |
| 64 | { |
| 65 | public: |
| 66 | QTextureAtlasPrivate(); |
| 67 | ~QTextureAtlasPrivate(); |
| 68 | |
| 69 | Q_DECLARE_PUBLIC(QTextureAtlas) |
| 70 | |
| 71 | QTextureAtlas::TextureId m_currId = 1; // IDs for new sub-textures |
| 72 | int m_currGen = 0; |
| 73 | |
| 74 | QTextureAtlasDataPtr m_data; |
| 75 | QScopedPointer<AreaAllocator> m_allocator; |
| 76 | QOpenGLTexture::PixelFormat m_pixelFormat; |
| 77 | QHash<QTextureAtlas::TextureId, AtlasTexture> m_textures; |
| 78 | }; |
| 79 | |
| 80 | class QTextureAtlasGenerator : public Qt3DRender::QTextureGenerator |
| 81 | { |
| 82 | public: |
| 83 | QTextureAtlasGenerator(const QTextureAtlasPrivate *texAtlas); |
| 84 | ~QTextureAtlasGenerator(); |
| 85 | Qt3DRender::QTextureDataPtr operator()() override; |
| 86 | bool operator==(const QTextureGenerator &other) const override; |
| 87 | |
| 88 | QT3D_FUNCTOR(QTextureAtlasGenerator) |
| 89 | |
| 90 | private: |
| 91 | QTextureAtlasDataPtr m_data; |
| 92 | Qt3DRender::QAbstractTexture::TextureFormat m_format; |
| 93 | QOpenGLTexture::PixelFormat m_pixelFormat; |
| 94 | int m_generation; |
| 95 | Qt3DCore::QNodeId m_atlasId; |
| 96 | }; |
| 97 | typedef QSharedPointer<QTextureAtlasGenerator> QTextureAtlasGeneratorPtr; |
| 98 | |
| 99 | } // namespace Qt3DExtras |
| 100 | |
| 101 | QT_END_NAMESPACE |
| 102 | |
| 103 | #endif // QT3DEXTRAS_QTEXTUREATLAS_P_P_H |
| 104 |