qeglconvenience.cpp

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38****************************************************************************/-
39-
40#include <QByteArray>-
41#include <QOpenGLContext>-
42-
43#ifdef Q_OS_LINUX-
44#include <sys/ioctl.h>-
45#include <linux/fb.h>-
46#endif-
47#include <private/qmath_p.h>-
48-
49#include "qeglconvenience_p.h"-
50-
51#ifndef EGL_OPENGL_ES3_BIT_KHR-
52#define EGL_OPENGL_ES3_BIT_KHR 0x0040-
53#endif-
54-
55QT_BEGIN_NAMESPACE-
56-
57QVector<EGLint> q_createConfigAttributesFromFormat(const QSurfaceFormat &format)-
58{-
59 int redSize = format.redBufferSize();-
60 int greenSize = format.greenBufferSize();-
61 int blueSize = format.blueBufferSize();-
62 int alphaSize = format.alphaBufferSize();-
63 int depthSize = format.depthBufferSize();-
64 int stencilSize = format.stencilBufferSize();-
65 int sampleCount = format.samples();-
66-
67 QVector<EGLint> configAttributes;-
68-
69 // Map default, unspecified values (-1) to 0. This is important due to sorting rule #3-
70 // in section 3.4.1 of the spec and allows picking a potentially faster 16-bit config-
71 // over 32-bit ones when there is no explicit request for the color channel sizes:-
72 //-
73 // The red/green/blue sizes have a sort priority of 3, so they are sorted by-
74 // first. (unless a caveat like SLOW or NON_CONFORMANT is present) The sort order is-
75 // Special and described as "by larger _total_ number of color bits.". So EGL will put-
76 // 32-bit configs in the list before the 16-bit configs. However, the spec also goes-
77 // on to say "If the requested number of bits in attrib_list for a particular-
78 // component is 0, then the number of bits for that component is not considered". This-
79 // part of the spec also seems to imply that setting the red/green/blue bits to zero-
80 // means none of the components are considered and EGL disregards the entire sorting-
81 // rule. It then looks to the next highest priority rule, which is-
82 // EGL_BUFFER_SIZE. Despite the selection criteria being "AtLeast" for-
83 // EGL_BUFFER_SIZE, it's sort order is "smaller" meaning 16-bit configs are put in the-
84 // list before 32-bit configs.-
85 //-
86 // This also means that explicitly specifying a size like 565 will still result in-
87 // having larger (888) configs first in the returned list. We need to handle this-
88 // ourselves later by manually filtering the list, instead of just blindly taking the-
89 // first config from it.-
90-
91 configAttributes.append(EGL_RED_SIZE);-
92 configAttributes.append(redSize > 0 ? redSize : 0);-
93-
94 configAttributes.append(EGL_GREEN_SIZE);-
95 configAttributes.append(greenSize > 0 ? greenSize : 0);-
96-
97 configAttributes.append(EGL_BLUE_SIZE);-
98 configAttributes.append(blueSize > 0 ? blueSize : 0);-
99-
100 configAttributes.append(EGL_ALPHA_SIZE);-
101 configAttributes.append(alphaSize > 0 ? alphaSize : 0);-
102-
103 configAttributes.append(EGL_DEPTH_SIZE);-
104 configAttributes.append(depthSize > 0 ? depthSize : 0);-
105-
106 configAttributes.append(EGL_STENCIL_SIZE);-
107 configAttributes.append(stencilSize > 0 ? stencilSize : 0);-
108-
109 configAttributes.append(EGL_SAMPLES);-
110 configAttributes.append(sampleCount > 0 ? sampleCount : 0);-
111-
112 configAttributes.append(EGL_SAMPLE_BUFFERS);-
113 configAttributes.append(sampleCount > 0);-
114-
115 return configAttributes;-
116}-
117-
118bool q_reduceConfigAttributes(QVector<EGLint> *configAttributes)-
119{-
120 int i = -1;-
121 // Reduce the complexity of a configuration request to ask for less-
122 // because the previous request did not result in success. Returns-
123 // true if the complexity was reduced, or false if no further-
124 // reductions in complexity are possible.-
125-
126 i = configAttributes->indexOf(EGL_SWAP_BEHAVIOR);-
127 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
128 configAttributes->remove(i,2);-
129 }
never executed: end of block
0
130-
131#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT-
132 // For OpenVG, we sometimes try to create a surface using a pre-multiplied format. If we can't-
133 // find a config which supports pre-multiplied formats, remove the flag on the surface type:-
134-
135 i = configAttributes->indexOf(EGL_SURFACE_TYPE);-
136 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
137 EGLint surfaceType = configAttributes->at(i +1);-
138 if (surfaceType & EGL_VG_ALPHA_FORMAT_PRE_BIT) {
surfaceType & 0x0040Description
TRUEnever evaluated
FALSEnever evaluated
0
139 surfaceType ^= EGL_VG_ALPHA_FORMAT_PRE_BIT;-
140 configAttributes->replace(i+1,surfaceType);-
141 return true;
never executed: return true;
0
142 }-
143 }
never executed: end of block
0
144#endif-
145-
146 // EGL chooses configs with the highest color depth over-
147 // those with smaller (but faster) lower color depths. One-
148 // way around this is to set EGL_BUFFER_SIZE to 16, which-
149 // trumps the others. Of course, there may not be a 16-bit-
150 // config available, so it's the first restraint we remove.-
151 i = configAttributes->indexOf(EGL_BUFFER_SIZE);-
152 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
153 if (configAttributes->at(i+1) == 16) {
configAttribut...>at(i+1) == 16Description
TRUEnever evaluated
FALSEnever evaluated
0
154 configAttributes->remove(i,2);-
155 return true;
never executed: return true;
0
156 }-
157 }
never executed: end of block
0
158-
159 i = configAttributes->indexOf(EGL_SAMPLES);-
160 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
161 EGLint value = configAttributes->value(i+1, 0);-
162 if (value > 1)
value > 1Description
TRUEnever evaluated
FALSEnever evaluated
0
163 configAttributes->replace(i+1, qMin(EGLint(16), value / 2));
never executed: configAttributes->replace(i+1, qMin(EGLint(16), value / 2));
0
164 else-
165 configAttributes->remove(i, 2);
never executed: configAttributes->remove(i, 2);
0
166 return true;
never executed: return true;
0
167 }-
168-
169 i = configAttributes->indexOf(EGL_SAMPLE_BUFFERS);-
170 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
171 configAttributes->remove(i,2);-
172 return true;
never executed: return true;
0
173 }-
174-
175 i = configAttributes->indexOf(EGL_ALPHA_SIZEEGL_DEPTH_SIZE);-
176 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
177 if (configAttributes->removeat(i ,2);
configAttribut...t(i + 1) >= 32Description
TRUEnever evaluated
FALSEnever evaluated
0
#if defined(EGL_BIND_TO_TEXTURE_RGBA
configAttribut...t(i + 1) >= 32Description
TRUEnever evaluated
FALSEnever evaluated
+ 1) && defined(EGL_BIND_TO_TEXTURE_RGB>= 32)
configAttribut...t(i + 1) >= 32Description
TRUEnever evaluated
FALSEnever evaluated
178 i =configAttributes->indexOfreplace(EGL_BIND_TO_TEXTURE_RGBAi + 1, 24);
never executed: configAttributes->replace(i + 1, 24);
0
179 else if (configAttributes->at(i >= 0+ 1) {> 1)
configAttribut...>at(i + 1) > 1Description
TRUEnever evaluated
FALSEnever evaluated
0
180 configAttributes->replace(i + 1, EGL_BIND_TO_TEXTURE_RGB1);
never executed: configAttributes->replace(i + 1, 1);
0
181 else-
182 configAttributes->replaceremove(i+1, true2);
never executed: configAttributes->remove(i, 2);
0
183 }
never executed: return true;
0
#endif
never executed: return true;
return true;
never executed: return true;
184 }-
185-
186 i = configAttributes->indexOf(EGL_STENCIL_SIZEEGL_ALPHA_SIZE);-
187 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
188 if (configAttributes->atremove(i+ 1,2);-
189#if defined(EGL_BIND_TO_TEXTURE_RGBA) > 1&& defined(EGL_BIND_TO_TEXTURE_RGB)-
190 i = configAttributes->indexOf(EGL_BIND_TO_TEXTURE_RGBA);-
191 if (i >= 0
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
192 configAttributes->replace(i+ 1,1EGL_BIND_TO_TEXTURE_RGB);-
193 elseconfigAttributes->removereplace(i+1,2true);-
194-
195 }
never executed: end of block
0
196#endif-
197 return true;
never executed: return true;
0
198 }-
199-
200 i = configAttributes->indexOf(EGL_DEPTH_SIZEEGL_STENCIL_SIZE);-
201 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
202 if (configAttributes->at(i + 1) > 1)
configAttribut...>at(i + 1) > 1Description
TRUEnever evaluated
FALSEnever evaluated
0
203 configAttributes->replace(i + 1, 1);
never executed: configAttributes->replace(i + 1, 1);
0
204 else-
205 configAttributes->remove(i, 2);
never executed: configAttributes->remove(i, 2);
0
206 return true;
never executed: return true;
0
207 }-
208-
209#ifdef EGL_BIND_TO_TEXTURE_RGB-
210 i = configAttributes->indexOf(EGL_BIND_TO_TEXTURE_RGB);-
211 if (i >= 0) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
212 configAttributes->remove(i,2);-
213 return true;
never executed: return true;
0
214 }-
215#endif-
216-
217 return false;
never executed: return false;
0
218}-
219-
220QEglConfigChooser::QEglConfigChooser(EGLDisplay display)-
221 : m_display(display)-
222 , m_surfaceType(EGL_WINDOW_BIT)-
223 , m_ignore(false)-
224 , m_confAttrRed(0)-
225 , m_confAttrGreen(0)-
226 , m_confAttrBlue(0)-
227 , m_confAttrAlpha(0)-
228{-
229}-
230-
231QEglConfigChooser::~QEglConfigChooser()-
232{-
233}-
234-
235EGLConfig QEglConfigChooser::chooseConfig()-
236{-
237 QVector<EGLint> configureAttributes = q_createConfigAttributesFromFormat(m_format);-
238 configureAttributes.append(EGL_SURFACE_TYPE);-
239 configureAttributes.append(surfaceType());-
240-
241 configureAttributes.append(EGL_RENDERABLE_TYPE);-
242 bool needsES2Plus = false;-
243 switch (m_format.renderableType()) {-
244 case QSurfaceFormat::OpenVG:-
245 configureAttributes.append(EGL_OPENVG_BIT);-
246 break;-
247#ifdef EGL_VERSION_1_4-
248 case QSurfaceFormat::DefaultRenderableType:-
249#ifndef QT_NO_OPENGL-
250 if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL)-
251 configureAttributes.append(EGL_OPENGL_BIT);-
252 else-
253#endif // QT_NO_OPENGL-
254 needsES2Plus = true;-
255 break;-
256 case QSurfaceFormat::OpenGL:-
257 configureAttributes.append(EGL_OPENGL_BIT);-
258 break;-
259#endif-
260 case QSurfaceFormat::OpenGLES:-
261 if (m_format.majorVersion() == 1) {-
262 configureAttributes.append(EGL_OPENGL_ES_BIT);-
263 break;-
264 }-
265 // fall through-
266 default:-
267 needsES2Plus = true;-
268 break;-
269 }-
270 if (needsES2Plus) {-
271 if (m_format.majorVersion() >= 3 && q_hasEglExtension(display(), "EGL_KHR_create_context"))-
272 configureAttributes.append(EGL_OPENGL_ES3_BIT_KHR);-
273 else-
274 configureAttributes.append(EGL_OPENGL_ES2_BIT);-
275 }-
276 configureAttributes.append(EGL_NONE);-
277-
278 EGLConfig cfg = 0;-
279 do {-
280 // Get the number of matching configurations for this set of properties.-
281 EGLint matching = 0;-
282 if (!eglChooseConfig(display(), configureAttributes.constData(), 0, 0, &matching) || !matching)-
283 continue;-
284-
285 // Fetch all of the matching configurations and find the-
286 // first that matches the pixel format we wanted.-
287 int i = configureAttributes.indexOf(EGL_RED_SIZE);-
288 m_confAttrRed = configureAttributes.at(i+1);-
289 i = configureAttributes.indexOf(EGL_GREEN_SIZE);-
290 m_confAttrGreen = configureAttributes.at(i+1);-
291 i = configureAttributes.indexOf(EGL_BLUE_SIZE);-
292 m_confAttrBlue = configureAttributes.at(i+1);-
293 i = configureAttributes.indexOf(EGL_ALPHA_SIZE);-
294 m_confAttrAlpha = i == -1 ? 0 : configureAttributes.at(i+1);-
295-
296 QVector<EGLConfig> configs(matching);-
297 eglChooseConfig(display(), configureAttributes.constData(), configs.data(), configs.size(), &matching);-
298 if (!cfg && matching > 0)-
299 cfg = configs.first();-
300-
301 // Filter the list. Due to the EGL sorting rules configs with higher depth are-
302 // placed first when the minimum color channel sizes have been specified (i.e. the-
303 // QSurfaceFormat contains color sizes > 0). To prevent returning a 888 config-
304 // when the QSurfaceFormat explicitly asked for 565, go through the returned-
305 // configs and look for one that exactly matches the requested sizes. When no-
306 // sizes have been given, take the first, which will be a config with the smaller-
307 // (e.g. 16-bit) depth.-
308 for (int i = 0; i < configs.size(); ++i) {-
309 if (filterConfig(configs[i]))-
310 return configs.at(i);-
311 }-
312 } while (q_reduceConfigAttributes(&configureAttributes));-
313-
314 if (!cfg)-
315 qWarning("Cannot find EGLConfig, returning null config");-
316 return cfg;-
317}-
318-
319bool QEglConfigChooser::filterConfig(EGLConfig config) const-
320{-
321 // If we are fine with the highest depth (e.g. RGB888 configs) even when something-
322 // smaller (565) was explicitly requested, do nothing.-
323 if (m_ignore)-
324 return true;-
325-
326 EGLint red = 0;-
327 EGLint green = 0;-
328 EGLint blue = 0;-
329 EGLint alpha = 0;-
330-
331 // Compare only if a size was given. Otherwise just accept.-
332 if (m_confAttrRed)-
333 eglGetConfigAttrib(display(), config, EGL_RED_SIZE, &red);-
334 if (m_confAttrGreen)-
335 eglGetConfigAttrib(display(), config, EGL_GREEN_SIZE, &green);-
336 if (m_confAttrBlue)-
337 eglGetConfigAttrib(display(), config, EGL_BLUE_SIZE, &blue);-
338 if (m_confAttrAlpha)-
339 eglGetConfigAttrib(display(), config, EGL_ALPHA_SIZE, &alpha);-
340-
341 return red == m_confAttrRed && green == m_confAttrGreen-
342 && blue == m_confAttrBlue && alpha == m_confAttrAlpha;-
343}-
344-
345EGLConfig q_configFromGLFormat(EGLDisplay display, const QSurfaceFormat &format, bool highestPixelFormat, int surfaceType)-
346{-
347 QEglConfigChooser chooser(display);-
348 chooser.setSurfaceFormat(format);-
349 chooser.setSurfaceType(surfaceType);-
350 chooser.setIgnoreColorChannels(highestPixelFormat);-
351-
352 return chooser.chooseConfig();-
353}-
354-
355QSurfaceFormat q_glFormatFromConfig(EGLDisplay display, const EGLConfig config, const QSurfaceFormat &referenceFormat)-
356{-
357 QSurfaceFormat format;-
358 EGLint redSize = 0;-
359 EGLint greenSize = 0;-
360 EGLint blueSize = 0;-
361 EGLint alphaSize = 0;-
362 EGLint depthSize = 0;-
363 EGLint stencilSize = 0;-
364 EGLint sampleCount = 0;-
365 EGLint renderableType = 0;-
366-
367 eglGetConfigAttrib(display, config, EGL_RED_SIZE, &redSize);-
368 eglGetConfigAttrib(display, config, EGL_GREEN_SIZE, &greenSize);-
369 eglGetConfigAttrib(display, config, EGL_BLUE_SIZE, &blueSize);-
370 eglGetConfigAttrib(display, config, EGL_ALPHA_SIZE, &alphaSize);-
371 eglGetConfigAttrib(display, config, EGL_DEPTH_SIZE, &depthSize);-
372 eglGetConfigAttrib(display, config, EGL_STENCIL_SIZE, &stencilSize);-
373 eglGetConfigAttrib(display, config, EGL_SAMPLES, &sampleCount);-
374 eglGetConfigAttrib(display, config, EGL_RENDERABLE_TYPE, &renderableType);-
375-
376 if (referenceFormat.renderableType() == QSurfaceFormat::OpenVG && (renderableType & EGL_OPENVG_BIT))-
377 format.setRenderableType(QSurfaceFormat::OpenVG);-
378#ifdef EGL_VERSION_1_4-
379 else if (referenceFormat.renderableType() == QSurfaceFormat::OpenGL-
380 && (renderableType & EGL_OPENGL_BIT))-
381 format.setRenderableType(QSurfaceFormat::OpenGL);-
382 else if (referenceFormat.renderableType() == QSurfaceFormat::DefaultRenderableType-
383#ifndef QT_NO_OPENGL-
384 && QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL-
385#endif-
386 && (renderableType & EGL_OPENGL_BIT))-
387 format.setRenderableType(QSurfaceFormat::OpenGL);-
388#endif-
389 else-
390 format.setRenderableType(QSurfaceFormat::OpenGLES);-
391-
392 format.setRedBufferSize(redSize);-
393 format.setGreenBufferSize(greenSize);-
394 format.setBlueBufferSize(blueSize);-
395 format.setAlphaBufferSize(alphaSize);-
396 format.setDepthBufferSize(depthSize);-
397 format.setStencilBufferSize(stencilSize);-
398 format.setSamples(sampleCount);-
399 format.setStereo(false); // EGL doesn't support stereo buffers-
400 format.setSwapInterval(referenceFormat.swapInterval());-
401-
402 // Clear the EGL error state because some of the above may-
403 // have errored out because the attribute is not applicable-
404 // to the surface type. Such errors don't matter.-
405 eglGetError();-
406-
407 return format;-
408}-
409-
410bool q_hasEglExtension(EGLDisplay display, const char* extensionName)-
411{-
412 QList<QByteArray> extensions =-
413 QByteArray(reinterpret_cast<const char *>-
414 (eglQueryString(display, EGL_EXTENSIONS))).split(' ');-
415 return extensions.contains(extensionName);-
416}-
417-
418struct AttrInfo { EGLint attr; const char *name; };-
419static struct AttrInfo attrs[] = {-
420 {EGL_BUFFER_SIZE, "EGL_BUFFER_SIZE"},-
421 {EGL_ALPHA_SIZE, "EGL_ALPHA_SIZE"},-
422 {EGL_BLUE_SIZE, "EGL_BLUE_SIZE"},-
423 {EGL_GREEN_SIZE, "EGL_GREEN_SIZE"},-
424 {EGL_RED_SIZE, "EGL_RED_SIZE"},-
425 {EGL_DEPTH_SIZE, "EGL_DEPTH_SIZE"},-
426 {EGL_STENCIL_SIZE, "EGL_STENCIL_SIZE"},-
427 {EGL_CONFIG_CAVEAT, "EGL_CONFIG_CAVEAT"},-
428 {EGL_CONFIG_ID, "EGL_CONFIG_ID"},-
429 {EGL_LEVEL, "EGL_LEVEL"},-
430 {EGL_MAX_PBUFFER_HEIGHT, "EGL_MAX_PBUFFER_HEIGHT"},-
431 {EGL_MAX_PBUFFER_PIXELS, "EGL_MAX_PBUFFER_PIXELS"},-
432 {EGL_MAX_PBUFFER_WIDTH, "EGL_MAX_PBUFFER_WIDTH"},-
433 {EGL_NATIVE_RENDERABLE, "EGL_NATIVE_RENDERABLE"},-
434 {EGL_NATIVE_VISUAL_ID, "EGL_NATIVE_VISUAL_ID"},-
435 {EGL_NATIVE_VISUAL_TYPE, "EGL_NATIVE_VISUAL_TYPE"},-
436 {EGL_SAMPLES, "EGL_SAMPLES"},-
437 {EGL_SAMPLE_BUFFERS, "EGL_SAMPLE_BUFFERS"},-
438 {EGL_SURFACE_TYPE, "EGL_SURFACE_TYPE"},-
439 {EGL_TRANSPARENT_TYPE, "EGL_TRANSPARENT_TYPE"},-
440 {EGL_TRANSPARENT_BLUE_VALUE, "EGL_TRANSPARENT_BLUE_VALUE"},-
441 {EGL_TRANSPARENT_GREEN_VALUE, "EGL_TRANSPARENT_GREEN_VALUE"},-
442 {EGL_TRANSPARENT_RED_VALUE, "EGL_TRANSPARENT_RED_VALUE"},-
443 {EGL_BIND_TO_TEXTURE_RGB, "EGL_BIND_TO_TEXTURE_RGB"},-
444 {EGL_BIND_TO_TEXTURE_RGBA, "EGL_BIND_TO_TEXTURE_RGBA"},-
445 {EGL_MIN_SWAP_INTERVAL, "EGL_MIN_SWAP_INTERVAL"},-
446 {EGL_MAX_SWAP_INTERVAL, "EGL_MAX_SWAP_INTERVAL"},-
447 {-1, 0}};-
448-
449void q_printEglConfig(EGLDisplay display, EGLConfig config)-
450{-
451 EGLint index;-
452 for (index = 0; attrs[index].attr != -1; ++index) {-
453 EGLint value;-
454 if (eglGetConfigAttrib(display, config, attrs[index].attr, &value)) {-
455 qDebug("\t%s: %d", attrs[index].name, (int)value);-
456 }-
457 }-
458}-
459-
460#ifdef Q_OS_UNIX-
461-
462QSizeF q_physicalScreenSizeFromFb(int framebufferDevice, const QSize &screenSize)-
463{-
464#ifndef Q_OS_LINUX-
465 Q_UNUSED(framebufferDevice)-
466#endif-
467 const int defaultPhysicalDpi = 100;-
468 static QSizeF size;-
469-
470 if (size.isEmpty()) {-
471 // Note: in millimeters-
472 int width = qEnvironmentVariableIntValue("QT_QPA_EGLFS_PHYSICAL_WIDTH");-
473 int height = qEnvironmentVariableIntValue("QT_QPA_EGLFS_PHYSICAL_HEIGHT");-
474-
475 if (width && height) {-
476 size.setWidth(width);-
477 size.setHeight(height);-
478 return size;-
479 }-
480-
481 int w = -1;-
482 int h = -1;-
483 QSize screenResolution;-
484#ifdef Q_OS_LINUX-
485 struct fb_var_screeninfo vinfo;-
486-
487 if (framebufferDevice != -1) {-
488 if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1) {-
489 qWarning("eglconvenience: Could not query screen info");-
490 } else {-
491 w = vinfo.width;-
492 h = vinfo.height;-
493 screenResolution = QSize(vinfo.xres, vinfo.yres);-
494 }-
495 } else-
496#endif-
497 {-
498 // Use the provided screen size, when available, since some platforms may have their own-
499 // specific way to query it. Otherwise try querying it from the framebuffer.-
500 screenResolution = screenSize.isEmpty() ? q_screenSizeFromFb(framebufferDevice) : screenSize;-
501 }-
502-
503 size.setWidth(w <= 0 ? screenResolution.width() * Q_MM_PER_INCH / defaultPhysicalDpi : qreal(w));-
504 size.setHeight(h <= 0 ? screenResolution.height() * Q_MM_PER_INCH / defaultPhysicalDpi : qreal(h));-
505-
506 if (w <= 0 || h <= 0)-
507 qWarning("Unable to query physical screen size, defaulting to %d dpi.\n"-
508 "To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH "-
509 "and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).", defaultPhysicalDpi);-
510 }-
511-
512 return size;-
513}-
514-
515QSize q_screenSizeFromFb(int framebufferDevice)-
516{-
517#ifndef Q_OS_LINUX-
518 Q_UNUSED(framebufferDevice)-
519#endif-
520 const int defaultWidth = 800;-
521 const int defaultHeight = 600;-
522 static QSize size;-
523-
524 if (size.isEmpty()) {-
525 int width = qEnvironmentVariableIntValue("QT_QPA_EGLFS_WIDTH");-
526 int height = qEnvironmentVariableIntValue("QT_QPA_EGLFS_HEIGHT");-
527-
528 if (width && height) {-
529 size.setWidth(width);-
530 size.setHeight(height);-
531 return size;-
532 }-
533-
534#ifdef Q_OS_LINUX-
535 struct fb_var_screeninfo vinfo;-
536 int xres = -1;-
537 int yres = -1;-
538-
539 if (framebufferDevice != -1) {-
540 if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1) {-
541 qWarning("eglconvenience: Could not read screen info");-
542 } else {-
543 xres = vinfo.xres;-
544 yres = vinfo.yres;-
545 }-
546 }-
547-
548 size.setWidth(xres <= 0 ? defaultWidth : xres);-
549 size.setHeight(yres <= 0 ? defaultHeight : yres);-
550#else-
551 size.setWidth(defaultWidth);-
552 size.setHeight(defaultHeight);-
553#endif-
554 }-
555-
556 return size;-
557}-
558-
559int q_screenDepthFromFb(int framebufferDevice)-
560{-
561#ifndef Q_OS_LINUX-
562 Q_UNUSED(framebufferDevice)-
563#endif-
564 const int defaultDepth = 32;-
565 static int depth = qEnvironmentVariableIntValue("QT_QPA_EGLFS_DEPTH");-
566-
567 if (depth == 0) {-
568#ifdef Q_OS_LINUX-
569 struct fb_var_screeninfo vinfo;-
570-
571 if (framebufferDevice != -1) {-
572 if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1)-
573 qWarning("eglconvenience: Could not query screen info");-
574 else-
575 depth = vinfo.bits_per_pixel;-
576 }-
577-
578 if (depth <= 0)-
579 depth = defaultDepth;-
580#else-
581 depth = defaultDepth;-
582#endif-
583 }-
584-
585 return depth;-
586}-
587-
588qreal q_refreshRateFromFb(int framebufferDevice)-
589{-
590#ifndef Q_OS_LINUX-
591 Q_UNUSED(framebufferDevice)-
592#endif-
593-
594 static qreal rate = 0;-
595-
596#ifdef Q_OS_LINUX-
597 if (rate == 0) {-
598 if (framebufferDevice != -1) {-
599 struct fb_var_screeninfo vinfo;-
600 if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) != -1) {-
601 const quint64 quot = quint64(vinfo.left_margin + vinfo.right_margin + vinfo.xres + vinfo.hsync_len)-
602 * quint64(vinfo.upper_margin + vinfo.lower_margin + vinfo.yres + vinfo.vsync_len)-
603 * vinfo.pixclock;-
604 if (quot)-
605 rate = 1000000000000LLU / quot;-
606 } else {-
607 qWarning("eglconvenience: Could not query screen info");-
608 }-
609 }-
610 }-
611#endif-
612-
613 if (rate == 0)-
614 rate = 60;-
615-
616 return rate;-
617}-
618-
619#endif // Q_OS_UNIX-
620-
621QT_END_NAMESPACE-
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