qopenglgradientcache.cpp

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8class QOpenGL2GradientCacheWrapper-
9{-
10public:-
11 QOpenGL2GradientCache *cacheForContext(QOpenGLContext *context) {-
12 QMutexLocker lock(&m_mutex);-
13 return m_resource.value<QOpenGL2GradientCache>(context);-
14 }-
15-
16private:-
17 QOpenGLMultiGroupSharedResource m_resource;-
18 QMutex m_mutex;-
19};-
20-
21namespace { namespace Q_QGS_qt_gradient_caches { typedef QOpenGL2GradientCacheWrapper Type; QBasicAtomicInt guard = { QtGlobalStatic::Uninitialized }; __attribute__((visibility("hidden"))) inline Type *innerFunction() { struct HolderBase { ~HolderBase() noexcept { if (guard.load() == QtGlobalStatic::Initialized) guard.store(QtGlobalStatic::Destroyed); } }; static struct Holder : public HolderBase { Type value; Holder() noexcept(noexcept(Type ())) : value () { guard.store(QtGlobalStatic::Initialized); } } holder; return &holder.value; } } } static QGlobalStatic<QOpenGL2GradientCacheWrapper, Q_QGS_qt_gradient_caches::innerFunction, Q_QGS_qt_gradient_caches::guard> qt_gradient_caches;-
22-
23QOpenGL2GradientCache::QOpenGL2GradientCache(QOpenGLContext *ctx)-
24 : QOpenGLSharedResource(ctx->shareGroup())-
25{-
26}-
27-
28QOpenGL2GradientCache::~QOpenGL2GradientCache()-
29{-
30 cache.clear();-
31}-
32-
33QOpenGL2GradientCache *QOpenGL2GradientCache::cacheForContext(QOpenGLContext *context)-
34{-
35 return qt_gradient_caches()->cacheForContext(context);-
36}-
37-
38void QOpenGL2GradientCache::invalidateResource()-
39{-
40 QMutexLocker lock(&m_mutex);-
41 cache.clear();-
42}-
43-
44void QOpenGL2GradientCache::freeResource(QOpenGLContext *)-
45{-
46 cleanCache();-
47}-
48-
49void QOpenGL2GradientCache::cleanCache()-
50{-
51 QMutexLocker lock(&m_mutex);-
52 QOpenGLGradientColorTableHash::const_iterator it = cache.constBegin();-
53 QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();-
54 for (; it != cache.constEnd(); ++it) {-
55 const CacheInfo &cache_info = it.value();-
56 funcs->glDeleteTextures(1, &cache_info.texId);-
57 }-
58 cache.clear();-
59}-
60-
61GLuint QOpenGL2GradientCache::getBuffer(const QGradient &gradient, qreal opacity)-
62{-
63 quint64 hash_val = 0;-
64-
65 const QGradientStops stops = gradient.stops();-
66 for (int i = 0; i < stops.size()
i < stops.size()Description
TRUEnever evaluated
FALSEnever evaluated
 && i <= 2
i <= 2Description
TRUEnever evaluated
FALSEnever evaluated
; i++)		0
67 hash_val += stops[i].second.rgba();
never executed: hash_val += stops[i].second.rgba();
0
68-
69 const QMutexLocker lock(&m_mutex);-
70 QOpenGLGradientColorTableHash::const_iterator it = cache.constFind(hash_val);-
71-
72 if (it == cache.constEnd()
it == cache.constEnd()Description
TRUEnever evaluated
FALSEnever evaluated
)		0
73 return
never executed: return addCacheElement(hash_val, gradient, opacity);
 addCacheElement(hash_val, gradient, opacity);
never executed: return addCacheElement(hash_val, gradient, opacity);
0
74 else {-
75 do {-
76 const CacheInfo &cache_info = it.value();-
77 if (cache_info.stops == stops
cache_info.stops == stopsDescription
TRUEnever evaluated
FALSEnever evaluated
 && cache_info.opacity == opacity
cache_info.opacity == opacityDescription
TRUEnever evaluated
FALSEnever evaluated
0
78 && cache_info.interpolationMode == gradient.interpolationMode()
cache_info.int...polationMode()Description
TRUEnever evaluated
FALSEnever evaluated
)		0
79 {-
80 return
never executed: return cache_info.texId;
 cache_info.texId;
never executed: return cache_info.texId;
0
81 }-
82 ++it;-
83 }
never executed: end of block
 while (it != cache.constEnd()
it != cache.constEnd()Description
TRUEnever evaluated
FALSEnever evaluated
 && it.key() == hash_val
it.key() == hash_valDescription
TRUEnever evaluated
FALSEnever evaluated
);		0
84-
85 return
never executed: return addCacheElement(hash_val, gradient, opacity);
 addCacheElement(hash_val, gradient, opacity);
never executed: return addCacheElement(hash_val, gradient, opacity);
0
86 }-
87}-
88-
89-
90GLuint QOpenGL2GradientCache::addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity)-
91{-
92 QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();-
93 if (cache.size() == maxCacheSize()) {-
94 int elem_to_remove = qrand() % maxCacheSize();-
95 quint64 key = cache.keys()[elem_to_remove];-
96-
97-
98 QOpenGLGradientColorTableHash::const_iterator it = cache.constFind(key);-
99 do {-
100 funcs->glDeleteTextures(1, &it.value().texId);-
101 } while (++it != cache.constEnd() && it.key() == key);-
102 cache.remove(key);-
103 }-
104-
105 CacheInfo cache_entry(gradient.stops(), opacity, gradient.interpolationMode());-
106 funcs->glGenTextures(1, &cache_entry.texId);-
107 funcs->glBindTexture(0x0DE1, cache_entry.texId);-
108 if (static_cast<QOpenGLExtensions *>(funcs)->hasOpenGLExtension(QOpenGLExtensions::Sized16Formats)) {-
109 QRgba64 buffer[1024];-
110 generateGradientColorTable(gradient, buffer, paletteSize(), opacity);-
111 funcs->glTexImage2D(0x0DE1, 0, 0x805B, paletteSize(), 1,-
112 0, 0x1908, 0x1403, buffer);-
113 } else {-
114 uint buffer[1024];-
115 generateGradientColorTable(gradient, buffer, paletteSize(), opacity);-
116 funcs->glTexImage2D(0x0DE1, 0, 0x1908, paletteSize(), 1,-
117 0, 0x1908, 0x1401, buffer);-
118 }-
119 return cache.insert(hash_val, cache_entry).value().texId;-
120}-
121-
122-
123-
124void QOpenGL2GradientCache::generateGradientColorTable(const QGradient& gradient, QRgba64 *colorTable, int size, qreal opacity) const-
125{-
126 int pos = 0;-
127 const QGradientStops s = gradient.stops();-
QVector<QRgba64> colors(s.size());
for (int i = 0; i < s.size(); ++i)
colors[i] = s[i].second.rgba64();
128-
129 bool colorInterpolation = (gradient.interpolationMode() == QGradient::ColorInterpolation);-
130-
131 uint alpha = qRound(opacity * 256);-
132 QRgba64 current_color = combineAlpha256(colorss[0],].second.rgba64(), alpha);-
133 qreal incr = 1.0 / qreal(size);-
134 qreal fpos = 1.5 * incr;-
135 colorTable[pos++] = qPremultiply(current_color);-
136-
137 while (fpos <= s.first().first
fpos <= s.first().firstDescription
TRUEnever evaluated
FALSEnever evaluated
) {		0
138 colorTable[pos] = colorTable[pos - 1];-
139 pos++;-
140 fpos += incr;-
141 }
never executed: end of block
0
142-
143 if (colorInterpolation
colorInterpolationDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
144 current_color = qPremultiply(current_color);
never executed: current_color = qPremultiply(current_color);
0
145-
146 const int sLast = s.size() - 1;-
147 for (int i = 0; i < s.size() - 1sLast
i < sLastDescription
TRUEnever evaluated
FALSEnever evaluated
; ++i) {		0
148 qreal delta = 1/(s[i+1].first - s[i].first);-
149 QRgba64 next_color = combineAlpha256(colorss[i + 1],].second.rgba64(), alpha);-
150 if (colorInterpolation
colorInterpolationDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
151 next_color = qPremultiply(next_color);
never executed: next_color = qPremultiply(next_color);
0
152-
153 while (fpos < s[i+1].first
fpos < s[i+1].firstDescription
TRUEnever evaluated
FALSEnever evaluated
 && pos < size
pos < sizeDescription
TRUEnever evaluated
FALSEnever evaluated
) {		0
154 int dist = int(256 * ((fpos - s[i].first) * delta));-
155 int idist = 256 - dist;-
156 if (colorInterpolation
colorInterpolationDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
157 colorTable[pos] = interpolate256(current_color, idist, next_color, dist);
never executed: colorTable[pos] = interpolate256(current_color, idist, next_color, dist);
0
158 else-
159 colorTable[pos] = qPremultiply(interpolate256(current_color, idist, next_color, dist));
never executed: colorTable[pos] = qPremultiply(interpolate256(current_color, idist, next_color, dist));
0
160 ++pos;-
161 fpos += incr;-
162 }
never executed: end of block
0
163 current_color = next_color;-
164 }
never executed: end of block
0
165-
166 ((!(s.size() > 0)) ? qt_assert("s.size() > 0",__FILE__,209212) : qt_noop());-
167-
168 QRgba64 last_color = qPremultiply(combineAlpha256(colors[s[sLast].second.size() - 1],rgba64(), alpha));-
169 for (;pos < size
pos < sizeDescription
TRUEnever evaluated
FALSEnever evaluated
; ++pos)		0
170 colorTable[pos] = last_color;
never executed: colorTable[pos] = last_color;
0
171-
172-
173 colorTable[size-1] = last_color;-
174}
never executed: end of block
0
175-
176void QOpenGL2GradientCache::generateGradientColorTable(const QGradient& gradient, uint *colorTable, int size, qreal opacity) const-
177{-
178 int pos = 0;-
179 const QGradientStops s = gradient.stops();-
QVector<uint> colors(s.size());
for (int i = 0; i < s.size(); ++i)
colors[i] = s[i].second.rgba();
180-
181 bool colorInterpolation = (gradient.interpolationMode() == QGradient::ColorInterpolation);-
182-
183 uint alpha = qRound(opacity * 256);-
184-
185 uint current_color = ((((colorss[0]].second.rgba() >> 24) * alpha) >> 8) << 24) | (colorss[0]].second.rgba() & 0x00ffffff);-
186 qreal incr = 1.0 / qreal(size);-
187 qreal fpos = 1.5 * incr;-
188 colorTable[pos++] = ARGB2RGBA(qPremultiply(current_color));-
189-
190 while (fpos <= s.first().first
fpos <= s.first().firstDescription
TRUEnever evaluated
FALSEnever evaluated
) {		0
191 colorTable[pos] = colorTable[pos - 1];-
192 pos++;-
193 fpos += incr;-
194 }
never executed: end of block
0
195-
196 if (colorInterpolation
colorInterpolationDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
197 current_color = qPremultiply(current_color);
never executed: current_color = qPremultiply(current_color);
0
198-
199 const int sLast = s.size() - 1;-
200 for (int i = 0; i < s.size() - 1sLast
i < sLastDescription
TRUEnever evaluated
FALSEnever evaluated
; ++i) {		0
201 qreal delta = 1/(s[i+1].first - s[i].first);-
202 uint next_color = ((((colorss[i + 1]].second.rgba() >> 24) * alpha) >> 8) << 24) | (colorss[i + 1]].second.rgba() & 0x00ffffff);-
203 if (colorInterpolation
colorInterpolationDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
204 next_color = qPremultiply(next_color);
never executed: next_color = qPremultiply(next_color);
0
205-
206 while (fpos < s[i+1].first
fpos < s[i+1].firstDescription
TRUEnever evaluated
FALSEnever evaluated
 && pos < size
pos < sizeDescription
TRUEnever evaluated
FALSEnever evaluated
) {		0
207 int dist = int(256 * ((fpos - s[i].first) * delta));-
208 int idist = 256 - dist;-
209 if (colorInterpolation
colorInterpolationDescription
TRUEnever evaluated
FALSEnever evaluated
)		0
210 colorTable[pos] = ARGB2RGBA(INTERPOLATE_PIXEL_256(current_color, idist, next_color, dist));
never executed: colorTable[pos] = ARGB2RGBA(INTERPOLATE_PIXEL_256(current_color, idist, next_color, dist));
0
211 else-
212 colorTable[pos] = ARGB2RGBA(qPremultiply(INTERPOLATE_PIXEL_256(current_color, idist, next_color, dist)));
never executed: colorTable[pos] = ARGB2RGBA(qPremultiply(INTERPOLATE_PIXEL_256(current_color, idist, next_color, dist)));
0
213 ++pos;-
214 fpos += incr;-
215 }
never executed: end of block
0
216 current_color = next_color;-
217 }
never executed: end of block
0
218-
219 ((!(s.size() > 0)) ? qt_assert("s.size() > 0",__FILE__,264265) : qt_noop());-
220-
221 uint last_color = ARGB2RGBA(qPremultiply(((((colors[s[sLast].second.sizergba() - 1]>> 24) * alpha) >> 8) << 24) | (colors[s[sLast].second.sizergba()- 1] & 0x00ffffff)));-
222 for (;pos < size
pos < sizeDescription
TRUEnever evaluated
FALSEnever evaluated
; ++pos)		0
223 colorTable[pos] = last_color;
never executed: colorTable[pos] = last_color;
0
224-
225-
226 colorTable[size-1] = last_color;-
227}
never executed: end of block
0
228-
229-
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