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39
40#ifndef QT3DEXTRAS_QTEXTUREATLAS_P_P_H
41#define QT3DEXTRAS_QTEXTUREATLAS_P_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of other Qt classes. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtCore/qscopedpointer.h>
55#include <Qt3DRender/private/qabstracttexture_p.h>
56#include <Qt3DRender/qtexturegenerator.h>
57#include <Qt3DExtras/private/areaallocator_p.h>
58#include <Qt3DExtras/private/qtextureatlas_p.h>
59
60QT_BEGIN_NAMESPACE
61
62namespace Qt3DExtras {
63
64// Used to store texture info within atlas
65struct AtlasTexture
66{
67 QRect position;
68 int padding = 0;
69};
70
71// data shared between QTextureAtlasPrivate and the QTextureGenerators
72// we use this extra indirection so we can lazily copy the sub-images
73// into the actual texture image in the backend texture loader thread.
74class QTextureAtlasData
75{
76public:
77 QTextureAtlasData(int w, int h, QImage::Format fmt);
78 ~QTextureAtlasData();
79
80 int width() const { return m_image.width(); }
81 int height() const { return m_image.height(); }
82
83 void addImage(const AtlasTexture &texture, const QImage &image);
84 QByteArray createUpdatedImageData();
85
86private:
87 struct Update {
88 AtlasTexture textureInfo;
89 QImage image;
90 };
91
92 QMutex m_mutex;
93 QImage m_image;
94 QVector<Update> m_updates;
95};
96
97typedef QSharedPointer<QTextureAtlasData> QTextureAtlasDataPtr;
98
99class QTextureAtlasPrivate : public Qt3DRender::QAbstractTexturePrivate
100{
101public:
102 QTextureAtlasPrivate();
103 ~QTextureAtlasPrivate();
104
105 Q_DECLARE_PUBLIC(QTextureAtlas)
106
107 QTextureAtlas::TextureId m_currId = 1; // IDs for new sub-textures
108 int m_currGen = 0;
109
110 QTextureAtlasDataPtr m_data;
111 QScopedPointer<AreaAllocator> m_allocator;
112 QOpenGLTexture::PixelFormat m_pixelFormat;
113 QHash<QTextureAtlas::TextureId, AtlasTexture> m_textures;
114};
115
116class QTextureAtlasGenerator : public Qt3DRender::QTextureGenerator
117{
118public:
119 QTextureAtlasGenerator(const QTextureAtlasPrivate *texAtlas);
120 ~QTextureAtlasGenerator();
121 Qt3DRender::QTextureDataPtr operator()() override;
122 bool operator==(const QTextureGenerator &other) const override;
123
124 QT3D_FUNCTOR(QTextureAtlasGenerator)
125
126private:
127 QTextureAtlasDataPtr m_data;
128 Qt3DRender::QAbstractTexture::TextureFormat m_format;
129 QOpenGLTexture::PixelFormat m_pixelFormat;
130 int m_generation;
131 Qt3DCore::QNodeId m_atlasId;
132};
133typedef QSharedPointer<QTextureAtlasGenerator> QTextureAtlasGeneratorPtr;
134
135} // namespace Qt3DExtras
136
137QT_END_NAMESPACE
138
139#endif // QT3DEXTRAS_QTEXTUREATLAS_P_P_H
140

source code of qt3d/src/extras/text/qtextureatlas_p_p.h