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Diffstat (limited to 'src/gui/opengl/platform/egl/qeglconvenience.cpp')
| -rw-r--r-- | src/gui/opengl/platform/egl/qeglconvenience.cpp | 628 |
1 files changed, 628 insertions, 0 deletions
diff --git a/src/gui/opengl/platform/egl/qeglconvenience.cpp b/src/gui/opengl/platform/egl/qeglconvenience.cpp new file mode 100644 index 0000000000..6076498b3e --- /dev/null +++ b/src/gui/opengl/platform/egl/qeglconvenience.cpp @@ -0,0 +1,628 @@ +/**************************************************************************** +** +** Copyright (C) 2020 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + + +#include <QtCore/qbytearray.h> +#include <QtGui/qopenglcontext.h> + +#ifdef Q_OS_LINUX +#include <sys/ioctl.h> +#include <linux/fb.h> +#endif +#include <QtGui/private/qmath_p.h> + +#include "qeglconvenience_p.h" + +#ifndef EGL_OPENGL_ES3_BIT_KHR +#define EGL_OPENGL_ES3_BIT_KHR 0x0040 +#endif + +QT_BEGIN_NAMESPACE + +QList<EGLint> q_createConfigAttributesFromFormat(const QSurfaceFormat &format) +{ + int redSize = format.redBufferSize(); + int greenSize = format.greenBufferSize(); + int blueSize = format.blueBufferSize(); + int alphaSize = format.alphaBufferSize(); + int depthSize = format.depthBufferSize(); + int stencilSize = format.stencilBufferSize(); + int sampleCount = format.samples(); + + QList<EGLint> configAttributes; + + // Map default, unspecified values (-1) to 0. This is important due to sorting rule #3 + // in section 3.4.1 of the spec and allows picking a potentially faster 16-bit config + // over 32-bit ones when there is no explicit request for the color channel sizes: + // + // The red/green/blue sizes have a sort priority of 3, so they are sorted by + // first. (unless a caveat like SLOW or NON_CONFORMANT is present) The sort order is + // Special and described as "by larger _total_ number of color bits.". So EGL will put + // 32-bit configs in the list before the 16-bit configs. However, the spec also goes + // on to say "If the requested number of bits in attrib_list for a particular + // component is 0, then the number of bits for that component is not considered". This + // part of the spec also seems to imply that setting the red/green/blue bits to zero + // means none of the components are considered and EGL disregards the entire sorting + // rule. It then looks to the next highest priority rule, which is + // EGL_BUFFER_SIZE. Despite the selection criteria being "AtLeast" for + // EGL_BUFFER_SIZE, it's sort order is "smaller" meaning 16-bit configs are put in the + // list before 32-bit configs. + // + // This also means that explicitly specifying a size like 565 will still result in + // having larger (888) configs first in the returned list. We need to handle this + // ourselves later by manually filtering the list, instead of just blindly taking the + // first config from it. + + configAttributes.append(EGL_RED_SIZE); + configAttributes.append(redSize > 0 ? redSize : 0); + + configAttributes.append(EGL_GREEN_SIZE); + configAttributes.append(greenSize > 0 ? greenSize : 0); + + configAttributes.append(EGL_BLUE_SIZE); + configAttributes.append(blueSize > 0 ? blueSize : 0); + + configAttributes.append(EGL_ALPHA_SIZE); + configAttributes.append(alphaSize > 0 ? alphaSize : 0); + + configAttributes.append(EGL_SAMPLES); + configAttributes.append(sampleCount > 0 ? sampleCount : 0); + + configAttributes.append(EGL_SAMPLE_BUFFERS); + configAttributes.append(sampleCount > 0); + + if (format.renderableType() != QSurfaceFormat::OpenVG) { + configAttributes.append(EGL_DEPTH_SIZE); + configAttributes.append(depthSize > 0 ? depthSize : 0); + + configAttributes.append(EGL_STENCIL_SIZE); + configAttributes.append(stencilSize > 0 ? stencilSize : 0); + } else { + // OpenVG needs alpha mask for clipping + configAttributes.append(EGL_ALPHA_MASK_SIZE); + configAttributes.append(8); + } + + return configAttributes; +} + +bool q_reduceConfigAttributes(QList<EGLint> *configAttributes) +{ + int i = -1; + // Reduce the complexity of a configuration request to ask for less + // because the previous request did not result in success. Returns + // true if the complexity was reduced, or false if no further + // reductions in complexity are possible. + + i = configAttributes->indexOf(EGL_SWAP_BEHAVIOR); + if (i >= 0) { + configAttributes->remove(i,2); + } + +#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT + // For OpenVG, we sometimes try to create a surface using a pre-multiplied format. If we can't + // find a config which supports pre-multiplied formats, remove the flag on the surface type: + + i = configAttributes->indexOf(EGL_SURFACE_TYPE); + if (i >= 0) { + EGLint surfaceType = configAttributes->at(i +1); + if (surfaceType & EGL_VG_ALPHA_FORMAT_PRE_BIT) { + surfaceType ^= EGL_VG_ALPHA_FORMAT_PRE_BIT; + configAttributes->replace(i+1,surfaceType); + return true; + } + } +#endif + + // EGL chooses configs with the highest color depth over + // those with smaller (but faster) lower color depths. One + // way around this is to set EGL_BUFFER_SIZE to 16, which + // trumps the others. Of course, there may not be a 16-bit + // config available, so it's the first restraint we remove. + i = configAttributes->indexOf(EGL_BUFFER_SIZE); + if (i >= 0) { + if (configAttributes->at(i+1) == 16) { + configAttributes->remove(i,2); + return true; + } + } + + i = configAttributes->indexOf(EGL_SAMPLES); + if (i >= 0) { + EGLint value = configAttributes->value(i+1, 0); + if (value > 1) + configAttributes->replace(i+1, qMin(EGLint(16), value / 2)); + else + configAttributes->remove(i, 2); + return true; + } + + i = configAttributes->indexOf(EGL_SAMPLE_BUFFERS); + if (i >= 0) { + configAttributes->remove(i,2); + return true; + } + + i = configAttributes->indexOf(EGL_DEPTH_SIZE); + if (i >= 0) { + if (configAttributes->at(i + 1) >= 32) + configAttributes->replace(i + 1, 24); + else if (configAttributes->at(i + 1) > 1) + configAttributes->replace(i + 1, 1); + else + configAttributes->remove(i, 2); + return true; + } + + i = configAttributes->indexOf(EGL_ALPHA_SIZE); + if (i >= 0) { + configAttributes->remove(i,2); +#if defined(EGL_BIND_TO_TEXTURE_RGBA) && defined(EGL_BIND_TO_TEXTURE_RGB) + i = configAttributes->indexOf(EGL_BIND_TO_TEXTURE_RGBA); + if (i >= 0) { + configAttributes->replace(i,EGL_BIND_TO_TEXTURE_RGB); + configAttributes->replace(i+1,true); + + } +#endif + return true; + } + + i = configAttributes->indexOf(EGL_STENCIL_SIZE); + if (i >= 0) { + if (configAttributes->at(i + 1) > 1) + configAttributes->replace(i + 1, 1); + else + configAttributes->remove(i, 2); + return true; + } + +#ifdef EGL_BIND_TO_TEXTURE_RGB + i = configAttributes->indexOf(EGL_BIND_TO_TEXTURE_RGB); + if (i >= 0) { + configAttributes->remove(i,2); + return true; + } +#endif + + return false; +} + +QEglConfigChooser::QEglConfigChooser(EGLDisplay display) + : m_display(display) + , m_surfaceType(EGL_WINDOW_BIT) + , m_ignore(false) + , m_confAttrRed(0) + , m_confAttrGreen(0) + , m_confAttrBlue(0) + , m_confAttrAlpha(0) +{ +} + +QEglConfigChooser::~QEglConfigChooser() +{ +} + +EGLConfig QEglConfigChooser::chooseConfig() +{ + QList<EGLint> configureAttributes = q_createConfigAttributesFromFormat(m_format); + configureAttributes.append(EGL_SURFACE_TYPE); + configureAttributes.append(surfaceType()); + + configureAttributes.append(EGL_RENDERABLE_TYPE); + bool needsES2Plus = false; + switch (m_format.renderableType()) { + case QSurfaceFormat::OpenVG: + configureAttributes.append(EGL_OPENVG_BIT); + break; +#ifdef EGL_VERSION_1_4 + case QSurfaceFormat::DefaultRenderableType: +#ifndef QT_NO_OPENGL + if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL) + configureAttributes.append(EGL_OPENGL_BIT); + else +#endif // QT_NO_OPENGL + needsES2Plus = true; + break; + case QSurfaceFormat::OpenGL: + configureAttributes.append(EGL_OPENGL_BIT); + break; +#endif + case QSurfaceFormat::OpenGLES: + if (m_format.majorVersion() == 1) { + configureAttributes.append(EGL_OPENGL_ES_BIT); + break; + } + Q_FALLTHROUGH(); + default: + needsES2Plus = true; + break; + } + if (needsES2Plus) { + if (m_format.majorVersion() >= 3 && q_hasEglExtension(display(), "EGL_KHR_create_context")) + configureAttributes.append(EGL_OPENGL_ES3_BIT_KHR); + else + configureAttributes.append(EGL_OPENGL_ES2_BIT); + } + configureAttributes.append(EGL_NONE); + + EGLConfig cfg = nullptr; + do { + // Get the number of matching configurations for this set of properties. + EGLint matching = 0; + if (!eglChooseConfig(display(), configureAttributes.constData(), nullptr, 0, &matching) || !matching) + continue; + + // Fetch all of the matching configurations and find the + // first that matches the pixel format we wanted. + int i = configureAttributes.indexOf(EGL_RED_SIZE); + m_confAttrRed = configureAttributes.at(i+1); + i = configureAttributes.indexOf(EGL_GREEN_SIZE); + m_confAttrGreen = configureAttributes.at(i+1); + i = configureAttributes.indexOf(EGL_BLUE_SIZE); + m_confAttrBlue = configureAttributes.at(i+1); + i = configureAttributes.indexOf(EGL_ALPHA_SIZE); + m_confAttrAlpha = i == -1 ? 0 : configureAttributes.at(i+1); + + QList<EGLConfig> configs(matching); + eglChooseConfig(display(), configureAttributes.constData(), configs.data(), configs.size(), &matching); + if (!cfg && matching > 0) + cfg = configs.first(); + + // Filter the list. Due to the EGL sorting rules configs with higher depth are + // placed first when the minimum color channel sizes have been specified (i.e. the + // QSurfaceFormat contains color sizes > 0). To prevent returning a 888 config + // when the QSurfaceFormat explicitly asked for 565, go through the returned + // configs and look for one that exactly matches the requested sizes. When no + // sizes have been given, take the first, which will be a config with the smaller + // (e.g. 16-bit) depth. + for (int i = 0; i < configs.size(); ++i) { + if (filterConfig(configs[i])) + return configs.at(i); + } + } while (q_reduceConfigAttributes(&configureAttributes)); + + if (!cfg) + qWarning("Cannot find EGLConfig, returning null config"); + return cfg; +} + +bool QEglConfigChooser::filterConfig(EGLConfig config) const +{ + // If we are fine with the highest depth (e.g. RGB888 configs) even when something + // smaller (565) was explicitly requested, do nothing. + if (m_ignore) + return true; + + EGLint red = 0; + EGLint green = 0; + EGLint blue = 0; + EGLint alpha = 0; + + // Compare only if a size was given. Otherwise just accept. + if (m_confAttrRed) + eglGetConfigAttrib(display(), config, EGL_RED_SIZE, &red); + if (m_confAttrGreen) + eglGetConfigAttrib(display(), config, EGL_GREEN_SIZE, &green); + if (m_confAttrBlue) + eglGetConfigAttrib(display(), config, EGL_BLUE_SIZE, &blue); + if (m_confAttrAlpha) + eglGetConfigAttrib(display(), config, EGL_ALPHA_SIZE, &alpha); + + return red == m_confAttrRed && green == m_confAttrGreen + && blue == m_confAttrBlue && alpha == m_confAttrAlpha; +} + +EGLConfig q_configFromGLFormat(EGLDisplay display, const QSurfaceFormat &format, bool highestPixelFormat, int surfaceType) +{ + QEglConfigChooser chooser(display); + chooser.setSurfaceFormat(format); + chooser.setSurfaceType(surfaceType); + chooser.setIgnoreColorChannels(highestPixelFormat); + + return chooser.chooseConfig(); +} + +QSurfaceFormat q_glFormatFromConfig(EGLDisplay display, const EGLConfig config, const QSurfaceFormat &referenceFormat) +{ + QSurfaceFormat format; + EGLint redSize = 0; + EGLint greenSize = 0; + EGLint blueSize = 0; + EGLint alphaSize = 0; + EGLint depthSize = 0; + EGLint stencilSize = 0; + EGLint sampleCount = 0; + EGLint renderableType = 0; + + eglGetConfigAttrib(display, config, EGL_RED_SIZE, &redSize); + eglGetConfigAttrib(display, config, EGL_GREEN_SIZE, &greenSize); + eglGetConfigAttrib(display, config, EGL_BLUE_SIZE, &blueSize); + eglGetConfigAttrib(display, config, EGL_ALPHA_SIZE, &alphaSize); + eglGetConfigAttrib(display, config, EGL_DEPTH_SIZE, &depthSize); + eglGetConfigAttrib(display, config, EGL_STENCIL_SIZE, &stencilSize); + eglGetConfigAttrib(display, config, EGL_SAMPLES, &sampleCount); + eglGetConfigAttrib(display, config, EGL_RENDERABLE_TYPE, &renderableType); + + if (referenceFormat.renderableType() == QSurfaceFormat::OpenVG && (renderableType & EGL_OPENVG_BIT)) + format.setRenderableType(QSurfaceFormat::OpenVG); +#ifdef EGL_VERSION_1_4 + else if (referenceFormat.renderableType() == QSurfaceFormat::OpenGL + && (renderableType & EGL_OPENGL_BIT)) + format.setRenderableType(QSurfaceFormat::OpenGL); + else if (referenceFormat.renderableType() == QSurfaceFormat::DefaultRenderableType +#ifndef QT_NO_OPENGL + && QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL +#endif + && (renderableType & EGL_OPENGL_BIT)) + format.setRenderableType(QSurfaceFormat::OpenGL); +#endif + else + format.setRenderableType(QSurfaceFormat::OpenGLES); + + format.setRedBufferSize(redSize); + format.setGreenBufferSize(greenSize); + format.setBlueBufferSize(blueSize); + format.setAlphaBufferSize(alphaSize); + format.setDepthBufferSize(depthSize); + format.setStencilBufferSize(stencilSize); + format.setSamples(sampleCount); + format.setStereo(false); // EGL doesn't support stereo buffers + format.setSwapInterval(referenceFormat.swapInterval()); + + // Clear the EGL error state because some of the above may + // have errored out because the attribute is not applicable + // to the surface type. Such errors don't matter. + eglGetError(); + + return format; +} + +bool q_hasEglExtension(EGLDisplay display, const char* extensionName) +{ + QList<QByteArray> extensions = + QByteArray(reinterpret_cast<const char *> + (eglQueryString(display, EGL_EXTENSIONS))).split(' '); + return extensions.contains(extensionName); +} + +struct AttrInfo { EGLint attr; const char *name; }; +static struct AttrInfo attrs[] = { + {EGL_BUFFER_SIZE, "EGL_BUFFER_SIZE"}, + {EGL_ALPHA_SIZE, "EGL_ALPHA_SIZE"}, + {EGL_BLUE_SIZE, "EGL_BLUE_SIZE"}, + {EGL_GREEN_SIZE, "EGL_GREEN_SIZE"}, + {EGL_RED_SIZE, "EGL_RED_SIZE"}, + {EGL_DEPTH_SIZE, "EGL_DEPTH_SIZE"}, + {EGL_STENCIL_SIZE, "EGL_STENCIL_SIZE"}, + {EGL_CONFIG_CAVEAT, "EGL_CONFIG_CAVEAT"}, + {EGL_CONFIG_ID, "EGL_CONFIG_ID"}, + {EGL_LEVEL, "EGL_LEVEL"}, + {EGL_MAX_PBUFFER_HEIGHT, "EGL_MAX_PBUFFER_HEIGHT"}, + {EGL_MAX_PBUFFER_PIXELS, "EGL_MAX_PBUFFER_PIXELS"}, + {EGL_MAX_PBUFFER_WIDTH, "EGL_MAX_PBUFFER_WIDTH"}, + {EGL_NATIVE_RENDERABLE, "EGL_NATIVE_RENDERABLE"}, + {EGL_NATIVE_VISUAL_ID, "EGL_NATIVE_VISUAL_ID"}, + {EGL_NATIVE_VISUAL_TYPE, "EGL_NATIVE_VISUAL_TYPE"}, + {EGL_SAMPLES, "EGL_SAMPLES"}, + {EGL_SAMPLE_BUFFERS, "EGL_SAMPLE_BUFFERS"}, + {EGL_SURFACE_TYPE, "EGL_SURFACE_TYPE"}, + {EGL_TRANSPARENT_TYPE, "EGL_TRANSPARENT_TYPE"}, + {EGL_TRANSPARENT_BLUE_VALUE, "EGL_TRANSPARENT_BLUE_VALUE"}, + {EGL_TRANSPARENT_GREEN_VALUE, "EGL_TRANSPARENT_GREEN_VALUE"}, + {EGL_TRANSPARENT_RED_VALUE, "EGL_TRANSPARENT_RED_VALUE"}, + {EGL_BIND_TO_TEXTURE_RGB, "EGL_BIND_TO_TEXTURE_RGB"}, + {EGL_BIND_TO_TEXTURE_RGBA, "EGL_BIND_TO_TEXTURE_RGBA"}, + {EGL_MIN_SWAP_INTERVAL, "EGL_MIN_SWAP_INTERVAL"}, + {EGL_MAX_SWAP_INTERVAL, "EGL_MAX_SWAP_INTERVAL"}, + {-1, nullptr}}; + +void q_printEglConfig(EGLDisplay display, EGLConfig config) +{ + EGLint index; + for (index = 0; attrs[index].attr != -1; ++index) { + EGLint value; + if (eglGetConfigAttrib(display, config, attrs[index].attr, &value)) { + qDebug("\t%s: %d", attrs[index].name, (int)value); + } + } +} + +#ifdef Q_OS_UNIX + +QSizeF q_physicalScreenSizeFromFb(int framebufferDevice, const QSize &screenSize) +{ +#ifndef Q_OS_LINUX + Q_UNUSED(framebufferDevice); +#endif + const int defaultPhysicalDpi = 100; + static QSizeF size; + + if (size.isEmpty()) { + // Note: in millimeters + int width = qEnvironmentVariableIntValue("QT_QPA_EGLFS_PHYSICAL_WIDTH"); + int height = qEnvironmentVariableIntValue("QT_QPA_EGLFS_PHYSICAL_HEIGHT"); + + if (width && height) { + size.setWidth(width); + size.setHeight(height); + return size; + } + + int w = -1; + int h = -1; + QSize screenResolution; +#ifdef Q_OS_LINUX + struct fb_var_screeninfo vinfo; + + if (framebufferDevice != -1) { + if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1) { + qWarning("eglconvenience: Could not query screen info"); + } else { + w = vinfo.width; + h = vinfo.height; + screenResolution = QSize(vinfo.xres, vinfo.yres); + } + } else +#endif + { + // Use the provided screen size, when available, since some platforms may have their own + // specific way to query it. Otherwise try querying it from the framebuffer. + screenResolution = screenSize.isEmpty() ? q_screenSizeFromFb(framebufferDevice) : screenSize; + } + + size.setWidth(w <= 0 ? screenResolution.width() * Q_MM_PER_INCH / defaultPhysicalDpi : qreal(w)); + size.setHeight(h <= 0 ? screenResolution.height() * Q_MM_PER_INCH / defaultPhysicalDpi : qreal(h)); + + if (w <= 0 || h <= 0) + qWarning("Unable to query physical screen size, defaulting to %d dpi.\n" + "To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH " + "and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).", defaultPhysicalDpi); + } + + return size; +} + +QSize q_screenSizeFromFb(int framebufferDevice) +{ +#ifndef Q_OS_LINUX + Q_UNUSED(framebufferDevice); +#endif + const int defaultWidth = 800; + const int defaultHeight = 600; + static QSize size; + + if (size.isEmpty()) { + int width = qEnvironmentVariableIntValue("QT_QPA_EGLFS_WIDTH"); + int height = qEnvironmentVariableIntValue("QT_QPA_EGLFS_HEIGHT"); + + if (width && height) { + size.setWidth(width); + size.setHeight(height); + return size; + } + +#ifdef Q_OS_LINUX + struct fb_var_screeninfo vinfo; + int xres = -1; + int yres = -1; + + if (framebufferDevice != -1) { + if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1) { + qWarning("eglconvenience: Could not read screen info"); + } else { + xres = vinfo.xres; + yres = vinfo.yres; + } + } + + size.setWidth(xres <= 0 ? defaultWidth : xres); + size.setHeight(yres <= 0 ? defaultHeight : yres); +#else + size.setWidth(defaultWidth); + size.setHeight(defaultHeight); +#endif + } + + return size; +} + +int q_screenDepthFromFb(int framebufferDevice) +{ +#ifndef Q_OS_LINUX + Q_UNUSED(framebufferDevice); +#endif + const int defaultDepth = 32; + static int depth = qEnvironmentVariableIntValue("QT_QPA_EGLFS_DEPTH"); + + if (depth == 0) { +#ifdef Q_OS_LINUX + struct fb_var_screeninfo vinfo; + + if (framebufferDevice != -1) { + if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1) + qWarning("eglconvenience: Could not query screen info"); + else + depth = vinfo.bits_per_pixel; + } + + if (depth <= 0) + depth = defaultDepth; +#else + depth = defaultDepth; +#endif + } + + return depth; +} + +qreal q_refreshRateFromFb(int framebufferDevice) +{ +#ifndef Q_OS_LINUX + Q_UNUSED(framebufferDevice); +#endif + + static qreal rate = 0; + +#ifdef Q_OS_LINUX + if (rate == 0) { + if (framebufferDevice != -1) { + struct fb_var_screeninfo vinfo; + if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) != -1) { + const quint64 quot = quint64(vinfo.left_margin + vinfo.right_margin + vinfo.xres + vinfo.hsync_len) + * quint64(vinfo.upper_margin + vinfo.lower_margin + vinfo.yres + vinfo.vsync_len) + * vinfo.pixclock; + if (quot) + rate = 1000000000000LLU / quot; + } else { + qWarning("eglconvenience: Could not query screen info"); + } + } + } +#endif + + if (rate == 0) + rate = 60; + + return rate; +} + +#endif // Q_OS_UNIX + +QT_END_NAMESPACE |