1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2019 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the QtQuick module of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:LGPL$ |
9 | ** Commercial License Usage |
10 | ** Licensees holding valid commercial Qt licenses may use this file in |
11 | ** accordance with the commercial license agreement provided with the |
12 | ** Software or, alternatively, in accordance with the terms contained in |
13 | ** a written agreement between you and The Qt Company. For licensing terms |
14 | ** and conditions see https://www.qt.io/terms-conditions. For further |
15 | ** information use the contact form at https://www.qt.io/contact-us. |
16 | ** |
17 | ** GNU Lesser General Public License Usage |
18 | ** Alternatively, this file may be used under the terms of the GNU Lesser |
19 | ** General Public License version 3 as published by the Free Software |
20 | ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
21 | ** packaging of this file. Please review the following information to |
22 | ** ensure the GNU Lesser General Public License version 3 requirements |
23 | ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
24 | ** |
25 | ** GNU General Public License Usage |
26 | ** Alternatively, this file may be used under the terms of the GNU |
27 | ** General Public License version 2.0 or (at your option) the GNU General |
28 | ** Public license version 3 or any later version approved by the KDE Free |
29 | ** Qt Foundation. The licenses are as published by the Free Software |
30 | ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
31 | ** included in the packaging of this file. Please review the following |
32 | ** information to ensure the GNU General Public License requirements will |
33 | ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
34 | ** https://www.gnu.org/licenses/gpl-3.0.html. |
35 | ** |
36 | ** $QT_END_LICENSE$ |
37 | ** |
38 | ****************************************************************************/ |
39 | |
40 | #ifndef QSGRHIDISTANCEFIELDGLYPHCACHE_H |
41 | #define QSGRHIDISTANCEFIELDGLYPHCACHE_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 purely as an |
48 | // implementation detail. 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 "qsgadaptationlayer_p.h" |
55 | #include <private/qsgareaallocator_p.h> |
56 | #include <QtGui/private/qrhi_p.h> |
57 | |
58 | QT_BEGIN_NAMESPACE |
59 | |
60 | class Q_QUICK_PRIVATE_EXPORT QSGRhiDistanceFieldGlyphCache : public QSGDistanceFieldGlyphCache |
61 | { |
62 | public: |
63 | QSGRhiDistanceFieldGlyphCache(QRhi *rhi, const QRawFont &font); |
64 | virtual ~QSGRhiDistanceFieldGlyphCache(); |
65 | |
66 | void requestGlyphs(const QSet<glyph_t> &glyphs) override; |
67 | void storeGlyphs(const QList<QDistanceField> &glyphs) override; |
68 | void referenceGlyphs(const QSet<glyph_t> &glyphs) override; |
69 | void releaseGlyphs(const QSet<glyph_t> &glyphs) override; |
70 | |
71 | bool useTextureResizeWorkaround() const; |
72 | bool createFullSizeTextures() const; |
73 | int maxTextureSize() const; |
74 | |
75 | void setMaxTextureCount(int max) { m_maxTextureCount = max; } |
76 | int maxTextureCount() const { return m_maxTextureCount; } |
77 | |
78 | void commitResourceUpdates(QRhiResourceUpdateBatch *mergeInto); |
79 | |
80 | bool eightBitFormatIsAlphaSwizzled() const override; |
81 | |
82 | private: |
83 | bool loadPregeneratedCache(const QRawFont &font); |
84 | |
85 | struct TextureInfo { |
86 | QRhiTexture *texture; |
87 | QSize size; |
88 | QRect allocatedArea; |
89 | QDistanceField image; |
90 | int padding = -1; |
91 | QVarLengthArray<QRhiTextureUploadEntry, 16> uploads; |
92 | |
93 | TextureInfo(const QRect &preallocRect = QRect()) : texture(nullptr), allocatedArea(preallocRect) { } |
94 | }; |
95 | |
96 | void createTexture(TextureInfo *texInfo, int width, int height, const void *pixels); |
97 | void createTexture(TextureInfo *texInfo, int width, int height); |
98 | void resizeTexture(TextureInfo *texInfo, int width, int height); |
99 | |
100 | TextureInfo *textureInfo(int index) |
101 | { |
102 | for (int i = m_textures.count(); i <= index; ++i) { |
103 | if (createFullSizeTextures()) |
104 | m_textures.append(t: QRect(0, 0, maxTextureSize(), maxTextureSize())); |
105 | else |
106 | m_textures.append(t: TextureInfo()); |
107 | } |
108 | |
109 | return &m_textures[index]; |
110 | } |
111 | |
112 | QRhi *m_rhi; |
113 | mutable int m_maxTextureSize = 0; |
114 | int m_maxTextureCount = 3; |
115 | QSGAreaAllocator *m_areaAllocator = nullptr; |
116 | QRhiResourceUpdateBatch *m_resourceUpdates = nullptr; |
117 | QList<TextureInfo> m_textures; |
118 | QHash<glyph_t, TextureInfo *> m_glyphsTexture; |
119 | QSet<glyph_t> m_unusedGlyphs; |
120 | QSet<QRhiTexture *> m_pendingDispose; |
121 | }; |
122 | |
123 | QT_END_NAMESPACE |
124 | |
125 | #endif // QSGRHIDISTANCEFIELDGLYPHCACHE_H |
126 | |