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3 ** Copyright (C) 2016 The Qt Company Ltd.
4 ** Contact: https://www.qt.io/licensing/
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6 ** This file is part of the QtOpenGL module of the Qt Toolkit.
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8 ** $QT_BEGIN_LICENSE:LGPL$
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17 ** GNU Lesser General Public License Usage
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25 ** GNU General Public License Usage
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38 ****************************************************************************/
39
40 #ifndef QGL_H
41 #define QGL_H
42
43 #ifndef QT_NO_OPENGL
44
45 #include <QtGui/qopengl.h>
46 #include <QtWidgets/qwidget.h>
47 #include <QtGui/qpaintengine.h>
48 #include <QtOpenGL/qglcolormap.h>
49 #include <QtCore/qmap.h>
50 #include <QtCore/qscopedpointer.h>
51
52 #include <QtGui/QSurfaceFormat>
53
54 QT_BEGIN_NAMESPACE
55
56
57
58
59 class QPixmap;
60 class QGLWidgetPrivate;
61 class QGLContextPrivate;
62
63 // Namespace class:
64 namespace QGL
65 {
66 enum FormatOption {
67 DoubleBuffer = 0x0001,
68 DepthBuffer = 0x0002,
69 Rgba = 0x0004,
70 AlphaChannel = 0x0008,
71 AccumBuffer = 0x0010,
72 StencilBuffer = 0x0020,
73 StereoBuffers = 0x0040,
74 DirectRendering = 0x0080,
75 HasOverlay = 0x0100,
76 SampleBuffers = 0x0200,
77 DeprecatedFunctions = 0x0400,
78 SingleBuffer = DoubleBuffer << 16,
79 NoDepthBuffer = DepthBuffer << 16,
80 ColorIndex = Rgba << 16,
81 NoAlphaChannel = AlphaChannel << 16,
82 NoAccumBuffer = AccumBuffer << 16,
83 NoStencilBuffer = StencilBuffer << 16,
84 NoStereoBuffers = StereoBuffers << 16,
85 IndirectRendering = DirectRendering << 16,
86 NoOverlay = HasOverlay << 16,
87 NoSampleBuffers = SampleBuffers << 16,
88 NoDeprecatedFunctions = DeprecatedFunctions << 16
89 };
90 Q_DECLARE_FLAGS(FormatOptions, FormatOption)
91 }
92
93 Q_DECLARE_OPERATORS_FOR_FLAGS(QGL::FormatOptions)
94
95 class QGLFormatPrivate;
96
97 class Q_OPENGL_EXPORT QGLFormat
98 {
99 public:
100 QGLFormat();
101 QGLFormat(QGL::FormatOptions options, int plane = 0);
102 QGLFormat(const QGLFormat &other);
103 QGLFormat &operator=(const QGLFormat &other);
104 ~QGLFormat();
105
106 void setDepthBufferSize(int size);
107 int depthBufferSize() const;
108
109 void setAccumBufferSize(int size);
110 int accumBufferSize() const;
111
112 void setRedBufferSize(int size);
113 int redBufferSize() const;
114
115 void setGreenBufferSize(int size);
116 int greenBufferSize() const;
117
118 void setBlueBufferSize(int size);
119 int blueBufferSize() const;
120
121 void setAlphaBufferSize(int size);
122 int alphaBufferSize() const;
123
124 void setStencilBufferSize(int size);
125 int stencilBufferSize() const;
126
127 void setSampleBuffers(bool enable);
128 bool sampleBuffers() const;
129
130 void setSamples(int numSamples);
131 int samples() const;
132
133 void setSwapInterval(int interval);
134 int swapInterval() const;
135
136 bool doubleBuffer() const;
137 void setDoubleBuffer(bool enable);
138 bool depth() const;
139 void setDepth(bool enable);
140 bool rgba() const;
141 void setRgba(bool enable);
142 bool alpha() const;
143 void setAlpha(bool enable);
144 bool accum() const;
145 void setAccum(bool enable);
146 bool stencil() const;
147 void setStencil(bool enable);
148 bool stereo() const;
149 void setStereo(bool enable);
150 bool directRendering() const;
151 void setDirectRendering(bool enable);
152 bool hasOverlay() const;
153 void setOverlay(bool enable);
154
155 int plane() const;
156 void setPlane(int plane);
157
158 void setOption(QGL::FormatOptions opt);
159 bool testOption(QGL::FormatOptions opt) const;
160
161 static QGLFormat defaultFormat();
162 static void setDefaultFormat(const QGLFormat& f);
163
164 static QGLFormat defaultOverlayFormat();
165 static void setDefaultOverlayFormat(const QGLFormat& f);
166
167 static bool hasOpenGL();
168 static bool hasOpenGLOverlays();
169
170 void setVersion(int major, int minor);
171 int majorVersion() const;
172 int minorVersion() const;
173
174 enum OpenGLContextProfile {
175 NoProfile,
176 CoreProfile,
177 CompatibilityProfile
178 };
179
180 void setProfile(OpenGLContextProfile profile);
181 OpenGLContextProfile profile() const;
182
183 enum OpenGLVersionFlag {
184 OpenGL_Version_None = 0x00000000,
185 OpenGL_Version_1_1 = 0x00000001,
186 OpenGL_Version_1_2 = 0x00000002,
187 OpenGL_Version_1_3 = 0x00000004,
188 OpenGL_Version_1_4 = 0x00000008,
189 OpenGL_Version_1_5 = 0x00000010,
190 OpenGL_Version_2_0 = 0x00000020,
191 OpenGL_Version_2_1 = 0x00000040,
192 OpenGL_ES_Common_Version_1_0 = 0x00000080,
193 OpenGL_ES_CommonLite_Version_1_0 = 0x00000100,
194 OpenGL_ES_Common_Version_1_1 = 0x00000200,
195 OpenGL_ES_CommonLite_Version_1_1 = 0x00000400,
196 OpenGL_ES_Version_2_0 = 0x00000800,
197 OpenGL_Version_3_0 = 0x00001000,
198 OpenGL_Version_3_1 = 0x00002000,
199 OpenGL_Version_3_2 = 0x00004000,
200 OpenGL_Version_3_3 = 0x00008000,
201 OpenGL_Version_4_0 = 0x00010000,
202 OpenGL_Version_4_1 = 0x00020000,
203 OpenGL_Version_4_2 = 0x00040000,
204 OpenGL_Version_4_3 = 0x00080000
205 };
206 Q_DECLARE_FLAGS(OpenGLVersionFlags, OpenGLVersionFlag)
207
208 static OpenGLVersionFlags openGLVersionFlags();
209
210 static QGLFormat fromSurfaceFormat(const QSurfaceFormat &format);
211 static QSurfaceFormat toSurfaceFormat(const QGLFormat &format);
212 private:
213 QGLFormatPrivate *d;
214
215 void detach();
216
217 friend Q_OPENGL_EXPORT bool operator==(const QGLFormat&, const QGLFormat&);
218 friend Q_OPENGL_EXPORT bool operator!=(const QGLFormat&, const QGLFormat&);
219 #ifndef QT_NO_DEBUG_STREAM
220 friend Q_OPENGL_EXPORT QDebug operator<<(QDebug, const QGLFormat &);
221 #endif
222 };
223
224 Q_DECLARE_OPERATORS_FOR_FLAGS(QGLFormat::OpenGLVersionFlags)
225
226 Q_OPENGL_EXPORT bool operator==(const QGLFormat&, const QGLFormat&);
227 Q_OPENGL_EXPORT bool operator!=(const QGLFormat&, const QGLFormat&);
228
229 #ifndef QT_NO_DEBUG_STREAM
230 Q_OPENGL_EXPORT QDebug operator<<(QDebug, const QGLFormat &);
231 #endif
232
233 class QGLFunctions;
234
235 class Q_OPENGL_EXPORT QGLContext
236 {
237 Q_DECLARE_PRIVATE(QGLContext)
238 public:
239 QGLContext(const QGLFormat& format, QPaintDevice* device);
240 QGLContext(const QGLFormat& format);
241 virtual ~QGLContext();
242
243 virtual bool create(const QGLContext* shareContext = nullptr);
244 bool isValid() const;
245 bool isSharing() const;
246 void reset();
247
248 static bool areSharing(const QGLContext *context1, const QGLContext *context2);
249
250 QGLFormat format() const;
251 QGLFormat requestedFormat() const;
252 void setFormat(const QGLFormat& format);
253
254 void moveToThread(QThread *thread);
255
256 virtual void makeCurrent();
257 virtual void doneCurrent();
258
259 virtual void swapBuffers() const;
260
261 QGLFunctions *functions() const;
262
263 enum BindOption {
264 NoBindOption = 0x0000,
265 InvertedYBindOption = 0x0001,
266 MipmapBindOption = 0x0002,
267 PremultipliedAlphaBindOption = 0x0004,
268 LinearFilteringBindOption = 0x0008,
269
270 MemoryManagedBindOption = 0x0010, // internal flag
271 CanFlipNativePixmapBindOption = 0x0020, // internal flag
272 TemporarilyCachedBindOption = 0x0040, // internal flag
273
274 DefaultBindOption = LinearFilteringBindOption
275 | InvertedYBindOption
276 | MipmapBindOption,
277 InternalBindOption = MemoryManagedBindOption
278 | PremultipliedAlphaBindOption
279 };
280 Q_DECLARE_FLAGS(BindOptions, BindOption)
281
282 GLuint bindTexture(const QImage &image, GLenum target, GLint format,
283 BindOptions options);
284 GLuint bindTexture(const QPixmap &pixmap, GLenum target, GLint format,
285 BindOptions options);
286
287 GLuint bindTexture(const QImage &image, GLenum target = GL_TEXTURE_2D,
288 GLint format = GL_RGBA);
289 GLuint bindTexture(const QPixmap &pixmap, GLenum target = GL_TEXTURE_2D,
290 GLint format = GL_RGBA);
291 GLuint bindTexture(const QString &fileName);
292
293 void deleteTexture(GLuint tx_id);
294
295 void drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D);
296 void drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D);
297
298 static void setTextureCacheLimit(int size);
299 static int textureCacheLimit();
300
301 QFunctionPointer getProcAddress(const QString &proc) const;
302 QPaintDevice* device() const;
303 QColor overlayTransparentColor() const;
304
305 static const QGLContext* currentContext();
306
307 static QGLContext *fromOpenGLContext(QOpenGLContext *platformContext);
308 QOpenGLContext *contextHandle() const;
309
310 protected:
311 virtual bool chooseContext(const QGLContext* shareContext = nullptr);
312
313 bool deviceIsPixmap() const;
314 bool windowCreated() const;
315 void setWindowCreated(bool on);
316 bool initialized() const;
317 void setInitialized(bool on);
318
319 uint colorIndex(const QColor& c) const;
320 void setValid(bool valid);
321 void setDevice(QPaintDevice *pDev);
322
323 protected:
324 static QGLContext* currentCtx;
325
326 private:
327 QGLContext(QOpenGLContext *windowContext);
328
329 QScopedPointer<QGLContextPrivate> d_ptr;
330
331 friend class QGLPixelBuffer;
332 friend class QGLPixelBufferPrivate;
333 friend class QGLWidget;
334 friend class QGLWidgetPrivate;
335 friend class QGLGlyphCache;
336 friend class QGL2PaintEngineEx;
337 friend class QGL2PaintEngineExPrivate;
338 friend class QGLEngineShaderManager;
339 friend class QGLTextureGlyphCache;
340 friend struct QGLGlyphTexture;
341 friend class QGLContextGroup;
342 friend class QGLPixmapBlurFilter;
343 friend class QGLTexture;
344 friend QGLFormat::OpenGLVersionFlags QGLFormat::openGLVersionFlags();
345 friend class QGLFramebufferObject;
346 friend class QGLFramebufferObjectPrivate;
347 friend class QGLFBOGLPaintDevice;
348 friend class QGLPaintDevice;
349 friend class QGLWidgetGLPaintDevice;
350 friend class QX11GLSharedContexts;
351 friend class QGLContextResourceBase;
352 friend class QSGDistanceFieldGlyphCache;
353 private:
354 Q_DISABLE_COPY(QGLContext)
355 };
356
Q_DECLARE_OPERATORS_FOR_FLAGS(QGLContext::BindOptions)357 Q_DECLARE_OPERATORS_FOR_FLAGS(QGLContext::BindOptions)
358
359 class Q_OPENGL_EXPORT QGLWidget : public QWidget
360 {
361 Q_OBJECT
362 Q_DECLARE_PRIVATE(QGLWidget)
363 public:
364 explicit QGLWidget(QWidget* parent=nullptr,
365 const QGLWidget* shareWidget = nullptr, Qt::WindowFlags f=Qt::WindowFlags());
366 explicit QGLWidget(QGLContext *context, QWidget* parent=nullptr,
367 const QGLWidget* shareWidget = nullptr, Qt::WindowFlags f=Qt::WindowFlags());
368 explicit QGLWidget(const QGLFormat& format, QWidget* parent=nullptr,
369 const QGLWidget* shareWidget = nullptr, Qt::WindowFlags f=Qt::WindowFlags());
370 ~QGLWidget();
371
372 void qglColor(const QColor& c) const;
373 void qglClearColor(const QColor& c) const;
374
375 bool isValid() const;
376 bool isSharing() const;
377
378 void makeCurrent();
379 void doneCurrent();
380
381 bool doubleBuffer() const;
382 void swapBuffers();
383
384 QGLFormat format() const;
385 void setFormat(const QGLFormat& format);
386
387 QGLContext* context() const;
388 void setContext(QGLContext* context, const QGLContext* shareContext = nullptr,
389 bool deleteOldContext = true);
390
391 QPixmap renderPixmap(int w = 0, int h = 0, bool useContext = false);
392 QImage grabFrameBuffer(bool withAlpha = false);
393
394 void makeOverlayCurrent();
395 const QGLContext* overlayContext() const;
396
397 static QImage convertToGLFormat(const QImage& img);
398
399 const QGLColormap & colormap() const;
400 void setColormap(const QGLColormap & map);
401
402 void renderText(int x, int y, const QString & str,
403 const QFont & fnt = QFont());
404 void renderText(double x, double y, double z, const QString & str,
405 const QFont & fnt = QFont());
406 QPaintEngine *paintEngine() const override;
407
408 GLuint bindTexture(const QImage &image, GLenum target, GLint format,
409 QGLContext::BindOptions options);
410 GLuint bindTexture(const QPixmap &pixmap, GLenum target, GLint format,
411 QGLContext::BindOptions options);
412
413 GLuint bindTexture(const QImage &image, GLenum target = GL_TEXTURE_2D,
414 GLint format = GL_RGBA);
415 GLuint bindTexture(const QPixmap &pixmap, GLenum target = GL_TEXTURE_2D,
416 GLint format = GL_RGBA);
417
418 GLuint bindTexture(const QString &fileName);
419
420 void deleteTexture(GLuint tx_id);
421
422 void drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D);
423 void drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D);
424
425 public Q_SLOTS:
426 virtual void updateGL();
427 virtual void updateOverlayGL();
428
429 protected:
430 bool event(QEvent *) override;
431 virtual void initializeGL();
432 virtual void resizeGL(int w, int h);
433 virtual void paintGL();
434
435 virtual void initializeOverlayGL();
436 virtual void resizeOverlayGL(int w, int h);
437 virtual void paintOverlayGL();
438
439 void setAutoBufferSwap(bool on);
440 bool autoBufferSwap() const;
441
442 void paintEvent(QPaintEvent*) override;
443 void resizeEvent(QResizeEvent*) override;
444
445 virtual void glInit();
446 virtual void glDraw();
447
448 QGLWidget(QGLWidgetPrivate &dd,
449 const QGLFormat &format = QGLFormat(),
450 QWidget *parent = nullptr,
451 const QGLWidget* shareWidget = nullptr,
452 Qt::WindowFlags f = Qt::WindowFlags());
453 private:
454 Q_DISABLE_COPY(QGLWidget)
455
456 friend class QGLDrawable;
457 friend class QGLPixelBuffer;
458 friend class QGLPixelBufferPrivate;
459 friend class QGLContext;
460 friend class QGLContextPrivate;
461 friend class QGLOverlayWidget;
462 friend class QGLPaintDevice;
463 friend class QGLWidgetGLPaintDevice;
464 };
465
466
467 //
468 // QGLFormat inline functions
469 //
470
doubleBuffer()471 inline bool QGLFormat::doubleBuffer() const
472 {
473 return testOption(QGL::DoubleBuffer);
474 }
475
depth()476 inline bool QGLFormat::depth() const
477 {
478 return testOption(QGL::DepthBuffer);
479 }
480
rgba()481 inline bool QGLFormat::rgba() const
482 {
483 return testOption(QGL::Rgba);
484 }
485
alpha()486 inline bool QGLFormat::alpha() const
487 {
488 return testOption(QGL::AlphaChannel);
489 }
490
accum()491 inline bool QGLFormat::accum() const
492 {
493 return testOption(QGL::AccumBuffer);
494 }
495
stencil()496 inline bool QGLFormat::stencil() const
497 {
498 return testOption(QGL::StencilBuffer);
499 }
500
stereo()501 inline bool QGLFormat::stereo() const
502 {
503 return testOption(QGL::StereoBuffers);
504 }
505
directRendering()506 inline bool QGLFormat::directRendering() const
507 {
508 return testOption(QGL::DirectRendering);
509 }
510
hasOverlay()511 inline bool QGLFormat::hasOverlay() const
512 {
513 return testOption(QGL::HasOverlay);
514 }
515
sampleBuffers()516 inline bool QGLFormat::sampleBuffers() const
517 {
518 return testOption(QGL::SampleBuffers);
519 }
520
521 QT_END_NAMESPACE
522
523 #endif // QT_NO_OPENGL
524 #endif // QGL_H
525