Long live Qt 4.5!

1 files changed, 787 insertions, 0 deletions

diff --git a/src/opengl/qegl.cpp b/src/opengl/qegl.cpp
new file mode 100644
index 0000000000..165a0f3710
--- /dev/null
+++ b/src/opengl/qegl.cpp
@@ -0,0 +1,787 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/qpaintdevice.h>
+#include <QtGui/qpixmap.h>
+#include <QtGui/qwidget.h>
+#include <QtCore/qdebug.h>
+#include "qegl_p.h"
+
+#if defined(QT_OPENGL_ES) || defined(QT_OPENVG)
+
+QT_BEGIN_NAMESPACE
+
+QEglContext::QEglContext()
+{
+    apiType = OpenGL;
+    dpy = EGL_NO_DISPLAY;
+    ctx = EGL_NO_CONTEXT;
+    surf = EGL_NO_SURFACE;
+    cfg = 0;
+    share = false;
+    reserved = 0;
+}
+
+QEglContext::~QEglContext()
+{
+    destroy();
+}
+
+bool QEglContext::isValid() const
+{
+    return (ctx != EGL_NO_CONTEXT);
+}
+
+bool QEglContext::isSharing() const
+{
+    return share;
+}
+
+// Open the EGL display associated with "device".
+bool QEglContext::openDisplay(QPaintDevice *device)
+{
+    if (dpy == EGL_NO_DISPLAY)
+        dpy = defaultDisplay(device);
+    return (dpy != EGL_NO_DISPLAY);
+}
+
+// Choose a configuration that matches "properties".
+bool QEglContext::chooseConfig
+        (const QEglProperties& properties, PixelFormatMatch match)
+{
+    QEglProperties props(properties);
+    EGLConfig *configs;
+    EGLint matching, size;
+    do {
+        // Get the number of matching configurations for this set of properties.
+        matching = 0;
+        if (!eglChooseConfig(dpy, props.properties(), 0, 256, &matching) || !matching)
+            continue;
+
+        // If we want the best pixel format, then return the first
+        // matching configuration.
+        if (match == BestPixelFormat) {
+            eglChooseConfig(dpy, props.properties(), &cfg, 1, &matching);
+            if (matching < 1)
+                continue;
+            return true;
+        }
+
+        // Fetch all of the matching configurations and find the
+        // first that matches the pixel format we wanted.
+        size = matching;
+        configs = new EGLConfig [size];
+        eglChooseConfig(dpy, props.properties(), configs, size, &matching);
+        for (EGLint index = 0; index < size; ++index) {
+            EGLint red, green, blue, alpha;
+            eglGetConfigAttrib(dpy, configs[index], EGL_RED_SIZE, &red);
+            eglGetConfigAttrib(dpy, configs[index], EGL_GREEN_SIZE, &green);
+            eglGetConfigAttrib(dpy, configs[index], EGL_BLUE_SIZE, &blue);
+            eglGetConfigAttrib(dpy, configs[index], EGL_ALPHA_SIZE, &alpha);
+            if (red == props.value(EGL_RED_SIZE) &&
+                    green == props.value(EGL_GREEN_SIZE) &&
+                    blue == props.value(EGL_BLUE_SIZE) &&
+                    (props.value(EGL_ALPHA_SIZE) == EGL_DONT_CARE ||
+                     alpha == props.value(EGL_ALPHA_SIZE))) {
+                cfg = configs[index];
+                delete [] configs;
+                return true;
+            }
+        }
+        delete [] configs;
+    } while (props.reduceConfiguration());
+
+#ifdef EGL_BIND_TO_TEXTURE_RGBA
+    // Don't report an error just yet if we failed to get a pbuffer
+    // configuration with texture rendering.  Only report failure if
+    // we cannot get any pbuffer configurations at all.
+    if (props.value(EGL_BIND_TO_TEXTURE_RGBA) == EGL_DONT_CARE &&
+        props.value(EGL_BIND_TO_TEXTURE_RGB) == EGL_DONT_CARE)
+#endif
+    {
+        qWarning() << "QEglContext::chooseConfig(): Could not find a suitable EGL configuration";
+        qWarning() << "Requested:" << props.toString();
+        qWarning() << "Available:";
+        dumpAllConfigs();
+    }
+    return false;
+}
+
+// Create the EGLContext.
+bool QEglContext::createContext(QEglContext *shareContext)
+{
+    // We need to select the correct API before calling eglCreateContext().
+#ifdef EGL_OPENGL_ES_API
+    if (apiType == OpenGL)
+        eglBindAPI(EGL_OPENGL_ES_API);
+#endif
+#ifdef EGL_OPENVG_API
+    if (apiType == OpenVG)
+        eglBindAPI(EGL_OPENVG_API);
+#endif
+
+    // Create a new context for the configuration.
+    QEglProperties contextProps;
+#if defined(QT_OPENGL_ES_2)
+    if (apiType == OpenGL)
+        contextProps.setValue(EGL_CONTEXT_CLIENT_VERSION, 2);
+#endif
+    if (shareContext && shareContext->ctx == EGL_NO_CONTEXT)
+        shareContext = 0;
+    if (shareContext) {
+        ctx = eglCreateContext(dpy, cfg, shareContext->ctx, contextProps.properties());
+        if (ctx == EGL_NO_CONTEXT) {
+            qWarning() << "QEglContext::createContext(): Could not share context:" << errorString(eglGetError());
+            shareContext = 0;
+        }
+    }
+    if (ctx == EGL_NO_CONTEXT) {
+        ctx = eglCreateContext(dpy, cfg, 0, contextProps.properties());
+        if (ctx == EGL_NO_CONTEXT) {
+            qWarning() << "QEglContext::createContext(): Unable to create EGL context:" << errorString(eglGetError());
+            return false;
+        }
+    }
+    share = (shareContext != 0);
+    return true;
+}
+
+// Recreate the surface for a paint device because the native id has changed.
+bool QEglContext::recreateSurface(QPaintDevice *device)
+{
+    // Bail out if the surface has not been created for the first time yet.
+    if (surf == EGL_NO_SURFACE)
+        return true;
+
+    // Destroy the old surface.
+    eglDestroySurface(dpy, surf);
+
+    // Create a new one.
+    return createSurface(device);
+}
+
+void QEglContext::destroy()
+{
+    if (ctx != EGL_NO_CONTEXT)
+        eglDestroyContext(dpy, ctx);
+    dpy = EGL_NO_DISPLAY;
+    ctx = EGL_NO_CONTEXT;
+    surf = EGL_NO_SURFACE;
+    cfg = 0;
+    share = false;
+}
+
+bool QEglContext::makeCurrent()
+{
+    if(ctx == EGL_NO_CONTEXT) {
+        qWarning() << "QEglContext::makeCurrent(): Cannot make invalid context current";
+        return false;
+    }
+
+    bool ok = eglMakeCurrent(dpy, surf, surf, ctx);
+    if (!ok) {
+        EGLint err = eglGetError();
+        qWarning() << "QEglContext::makeCurrent():" << errorString(err);
+    }
+    return ok;
+}
+
+bool QEglContext::doneCurrent()
+{
+    // If the context is invalid, we assume that an error was reported
+    // when makeCurrent() was called.
+    if (ctx == EGL_NO_CONTEXT)
+        return false;
+
+    // We need to select the correct API before calling eglMakeCurrent()
+    // with EGL_NO_CONTEXT because threads can have both OpenGL and OpenVG
+    // contexts active at the same time.
+#ifdef EGL_OPENGL_ES_API
+    if (apiType == OpenGL)
+        eglBindAPI(EGL_OPENGL_ES_API);
+#endif
+#ifdef EGL_OPENVG_API
+    if (apiType == OpenVG)
+        eglBindAPI(EGL_OPENVG_API);
+#endif
+
+    bool ok = eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    if (!ok) {
+        EGLint err = eglGetError();
+        qWarning() << "QEglContext::doneCurrent():" << errorString(err);
+    }
+    return ok;
+}
+
+bool QEglContext::swapBuffers()
+{
+    if(ctx == EGL_NO_CONTEXT)
+        return false;
+
+    bool ok = eglSwapBuffers(dpy, surf);
+    if (!ok) {
+        EGLint err = eglGetError();
+        qWarning() << "QEglContext::swapBuffers():" << errorString(err);
+    }
+    return ok;
+}
+
+// Wait for native rendering operations to complete before starting
+// to use OpenGL/OpenVG operations.
+void QEglContext::waitNative()
+{
+#ifdef EGL_CORE_NATIVE_ENGINE
+    eglWaitNative(EGL_CORE_NATIVE_ENGINE);
+#endif
+}
+
+// Wait for client OpenGL/OpenVG operations to complete before
+// using native rendering operations.
+void QEglContext::waitClient()
+{
+#ifdef EGL_OPENGL_ES_API
+    if (apiType == OpenGL) {
+        eglBindAPI(EGL_OPENGL_ES_API);
+        eglWaitClient();
+    }
+#else
+    if (apiType == OpenGL)
+        eglWaitGL();
+#endif
+#ifdef EGL_OPENVG_API
+    if (apiType == OpenVG) {
+        eglBindAPI(EGL_OPENVG_API);
+        eglWaitClient();
+    }
+#endif
+}
+
+// Query the actual size of the EGL surface.
+QSize QEglContext::surfaceSize() const
+{
+    int w, h;
+    eglQuerySurface(dpy, surf, EGL_WIDTH, &w);
+    eglQuerySurface(dpy, surf, EGL_HEIGHT, &h);
+    return QSize(w, h);
+}
+
+// Query the value of a configuration attribute.
+bool QEglContext::configAttrib(int name, EGLint *value) const
+{
+    return eglGetConfigAttrib(dpy, cfg, name, value);
+}
+
+// Retrieve all of the properties on "cfg".  If zero, return
+// the context's configuration.
+QEglProperties QEglContext::configProperties(EGLConfig cfg) const
+{
+    if (!cfg)
+        cfg = config();
+    QEglProperties props;
+    for (int name = 0x3020; name <= 0x304F; ++name) {
+        EGLint value;
+        if (name != EGL_NONE && eglGetConfigAttrib(dpy, cfg, name, &value))
+            props.setValue(name, value);
+    }
+    eglGetError();  // Clear the error state.
+    return props;
+}
+
+// Initialize and return the default display.
+EGLDisplay QEglContext::defaultDisplay(QPaintDevice *device)
+{
+    static EGLDisplay dpy = EGL_NO_DISPLAY;
+    if (dpy == EGL_NO_DISPLAY) {
+        dpy = getDisplay(device);
+        if (dpy == EGL_NO_DISPLAY) {
+            qWarning() << "QEglContext::defaultDisplay(): Cannot open EGL display";
+            return EGL_NO_DISPLAY;
+        }
+        if (!eglInitialize(dpy, NULL, NULL)) {
+            EGLint err = eglGetError();
+            qWarning() << "QEglContext::defaultDisplay(): Cannot initialize EGL display:" << errorString(err);
+            return EGL_NO_DISPLAY;
+        }
+#ifdef EGL_OPENGL_ES_API
+        eglBindAPI(EGL_OPENGL_ES_API);
+#endif
+    }
+    return dpy;
+}
+
+// Return the error string associated with a specific code.
+QString QEglContext::errorString(int code)
+{
+    static const char * const errors[] = {
+        "Success (0x3000)",                 // No tr
+        "Not initialized (0x3001)",         // No tr
+        "Bad access (0x3002)",              // No tr
+        "Bad alloc (0x3003)",               // No tr
+        "Bad attribute (0x3004)",           // No tr
+        "Bad config (0x3005)",              // No tr
+        "Bad context (0x3006)",             // No tr
+        "Bad current surface (0x3007)",     // No tr
+        "Bad display (0x3008)",             // No tr
+        "Bad match (0x3009)",               // No tr
+        "Bad native pixmap (0x300A)",       // No tr
+        "Bad native window (0x300B)",       // No tr
+        "Bad parameter (0x300C)",           // No tr
+        "Bad surface (0x300D)",             // No tr
+        "Context lost (0x300E)"             // No tr
+    };
+    if (code >= 0x3000 && code <= 0x300E) {
+        return QString::fromLatin1(errors[code - 0x3000]);
+    } else {
+        return QLatin1String("0x") + QString::number(code, 16);
+    }
+}
+
+// Dump all of the EGL configurations supported by the system.
+void QEglContext::dumpAllConfigs()
+{
+    QEglProperties props;
+    EGLint count = 0;
+    if (!eglGetConfigs(dpy, 0, 0, &count))
+        return;
+    if (count < 1)
+        return;
+    EGLConfig *configs = new EGLConfig [count];
+    eglGetConfigs(dpy, configs, count, &count);
+    for (EGLint index = 0; index < count; ++index) {
+        props = configProperties(configs[index]);
+        qWarning() << props.toString();
+    }
+    delete [] configs;
+}
+
+// Initialize a property block.
+QEglProperties::QEglProperties()
+{
+    props.append(EGL_NONE);
+}
+
+// Fetch the current value associated with a property.
+int QEglProperties::value(int name) const
+{
+    for (int index = 0; index < (props.size() - 1); index += 2) {
+        if (props[index] == name)
+            return props[index + 1];
+    }
+    return EGL_DONT_CARE;
+}
+
+// Set the value associated with a property, replacing an existing
+// value if there is one.
+void QEglProperties::setValue(int name, int value)
+{
+    for (int index = 0; index < (props.size() - 1); index += 2) {
+        if (props[index] == name) {
+            props[index + 1] = value;
+            return;
+        }
+    }
+    props[props.size() - 1] = name;
+    props.append(value);
+    props.append(EGL_NONE);
+}
+
+// Remove a property value.  Returns false if the property is not present.
+bool QEglProperties::removeValue(int name)
+{
+    for (int index = 0; index < (props.size() - 1); index += 2) {
+        if (props[index] == name) {
+            while ((index + 2) < props.size()) {
+                props[index] = props[index + 2];
+                ++index;
+            }
+            props.resize(props.size() - 2);
+            return true;
+        }
+    }
+    return false;
+}
+
+// Sets the red, green, blue, and alpha sizes based on a pixel format.
+// Normally used to match a configuration request to the screen format.
+void QEglProperties::setPixelFormat(QImage::Format pixelFormat)
+{
+    int red, green, blue, alpha;
+    switch (pixelFormat) {
+        case QImage::Format_RGB32:
+        case QImage::Format_RGB888:
+            red = green = blue = 8; alpha = 0; break;
+        case QImage::Format_ARGB32:
+        case QImage::Format_ARGB32_Premultiplied:
+            red = green = blue = alpha = 8; break;
+        case QImage::Format_RGB16:
+            red = 5; green = 6; blue = 5; alpha = 0; break;
+        case QImage::Format_ARGB8565_Premultiplied:
+            red = 5; green = 6; blue = 5; alpha = 8; break;
+        case QImage::Format_RGB666:
+            red = green = blue = 6; alpha = 0; break;
+        case QImage::Format_ARGB6666_Premultiplied:
+            red = green = blue = alpha = 6; break;
+        case QImage::Format_RGB555:
+            red = green = blue = 5; alpha = 0; break;
+        case QImage::Format_ARGB8555_Premultiplied:
+            red = green = blue = 5; alpha = 8; break;
+        case QImage::Format_RGB444:
+            red = green = blue = 4; alpha = 0; break;
+        case QImage::Format_ARGB4444_Premultiplied:
+            red = green = blue = alpha = 4; break;
+        default:
+            qWarning() << "QEglProperties::setPixelFormat(): Unsupported pixel format";
+            red = green = blue = alpha = 1; break;
+    }
+    setValue(EGL_RED_SIZE, red);
+    setValue(EGL_GREEN_SIZE, green);
+    setValue(EGL_BLUE_SIZE, blue);
+    setValue(EGL_ALPHA_SIZE, alpha);
+}
+
+void QEglProperties::setRenderableType(int api)
+{
+#if defined(EGL_RENDERABLE_TYPE)
+#if defined(QT_OPENGL_ES_2)
+    if (api == QEglContext::OpenGL)
+        setValue(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT);
+#elif defined(QT_OPENGL_ES)
+    if (api == QEglContext::OpenGL)
+        setValue(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT);
+#endif
+#if defined(EGL_OPENVG_BIT)
+    if (api == QEglContext::OpenVG)
+        setValue(EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT);
+#endif
+#else
+    Q_UNUSED(api);
+#endif
+}
+
+// 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.
+bool QEglProperties::reduceConfiguration()
+{
+    if (removeValue(EGL_SAMPLE_BUFFERS)) {
+        removeValue(EGL_SAMPLES);
+        return true;
+    }
+    if (removeValue(EGL_ALPHA_SIZE))
+        return true;
+    if (removeValue(EGL_STENCIL_SIZE))
+        return true;
+    if (removeValue(EGL_DEPTH_SIZE))
+        return true;
+    return false;
+}
+
+static void addTag(QString& str, const QString& tag)
+{
+    int lastnl = str.lastIndexOf(QLatin1String("\n"));
+    if (lastnl == -1)
+        lastnl = 0;
+    if ((str.length() - lastnl) >= 50)
+        str += QLatin1String("\n   ");
+    str += tag;
+}
+
+// Convert a property list to a string suitable for debug output.
+QString QEglProperties::toString() const
+{
+    QString str;
+    int val;
+
+    val = value(EGL_CONFIG_ID);
+    if (val != EGL_DONT_CARE) {
+        str += QLatin1String("id=");
+        str += QString::number(val);
+        str += QLatin1String(" ");
+    }
+
+#ifdef EGL_RENDERABLE_TYPE
+    val = value(EGL_RENDERABLE_TYPE);
+    if (val != EGL_DONT_CARE) {
+        str += QLatin1String("type=");
+        QStringList types;
+        if ((val & EGL_OPENGL_ES_BIT) != 0)
+            types += QLatin1String("es1");
+#ifdef EGL_OPENGL_ES2_BIT
+        if ((val & EGL_OPENGL_ES2_BIT) != 0)
+            types += QLatin1String("es2");
+#endif
+        if ((val & EGL_OPENVG_BIT) != 0)
+            types += QLatin1String("vg");
+        if ((val & ~7) != 0)
+            types += QString::number(val);
+        str += types.join(QLatin1String(","));
+    } else {
+        str += QLatin1String("type=any");
+    }
+#else
+    str += QLatin1String("type=es1");
+#endif
+
+    int red = value(EGL_RED_SIZE);
+    int green = value(EGL_GREEN_SIZE);
+    int blue = value(EGL_BLUE_SIZE);
+    int alpha = value(EGL_ALPHA_SIZE);
+    int bufferSize = value(EGL_BUFFER_SIZE);
+    if (bufferSize == (red + green + blue + alpha))
+        bufferSize = EGL_DONT_CARE;
+    str += QLatin1String(" rgba=");
+    str += QString::number(red);
+    str += QLatin1String(",");
+    str += QString::number(green);
+    str += QLatin1String(",");
+    str += QString::number(blue);
+    str += QLatin1String(",");
+    str += QString::number(alpha);
+    if (bufferSize != EGL_DONT_CARE) {
+        // Only report buffer size if different than r+g+b+a.
+        str += QLatin1String(" buffer-size=");
+        str += QString::number(bufferSize);
+    }
+
+#ifdef EGL_COLOR_BUFFER_TYPE
+    val = value(EGL_COLOR_BUFFER_TYPE);
+    if (val == EGL_LUMINANCE_BUFFER) {
+        addTag(str, QLatin1String(" color-buffer-type=luminance"));
+    } else if (val != EGL_DONT_CARE && val != EGL_RGB_BUFFER) {
+        addTag(str, QLatin1String(" color-buffer-type="));
+        str += QString::number(val, 16);
+    }
+#endif
+
+    val = value(EGL_DEPTH_SIZE);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" depth="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_STENCIL_SIZE);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" stencil="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_SURFACE_TYPE);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" surface-type="));
+        QStringList types;
+        if ((val & EGL_WINDOW_BIT) != 0)
+            types += QLatin1String("window");
+        if ((val & EGL_PIXMAP_BIT) != 0)
+            types += QLatin1String("pixmap");
+        if ((val & EGL_PBUFFER_BIT) != 0)
+            types += QLatin1String("pbuffer");
+#ifdef EGL_VG_COLORSPACE_LINEAR_BIT
+        if ((val & EGL_VG_COLORSPACE_LINEAR_BIT) != 0)
+            types += QLatin1String("vg-colorspace-linear");
+#endif
+#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
+        if ((val & EGL_VG_ALPHA_FORMAT_PRE_BIT) != 0)
+            types += QLatin1String("vg-alpha-format-pre");
+#endif
+        if ((val & ~(EGL_WINDOW_BIT | EGL_PIXMAP_BIT | EGL_PBUFFER_BIT
+#ifdef EGL_VG_COLORSPACE_LINEAR_BIT
+                     | EGL_VG_COLORSPACE_LINEAR_BIT
+#endif
+#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
+                     | EGL_VG_ALPHA_FORMAT_PRE_BIT
+#endif
+                     )) != 0) {
+            types += QString::number(val);
+        }
+        str += types.join(QLatin1String(","));
+    }
+
+    val = value(EGL_CONFIG_CAVEAT);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" caveat="));
+        if (val == EGL_NONE)
+            str += QLatin1String("none");
+        else if (val == EGL_SLOW_CONFIG)
+            str += QLatin1String("slow");
+        else if (val == EGL_NON_CONFORMANT_CONFIG)
+            str += QLatin1String("non-conformant");
+        else
+            str += QString::number(val, 16);
+    }
+
+    val = value(EGL_LEVEL);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" level="));
+        str += QString::number(val);
+    }
+
+    int width, height, pixels;
+    width = value(EGL_MAX_PBUFFER_WIDTH);
+    height = value(EGL_MAX_PBUFFER_HEIGHT);
+    pixels = value(EGL_MAX_PBUFFER_PIXELS);
+    if (height != EGL_DONT_CARE || width != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" max-pbuffer-size="));
+        str += QString::number(width);
+        str += QLatin1String("x");
+        str += QString::number(height);
+        if (pixels != (width * height)) {
+            addTag(str, QLatin1String(" max-pbuffer-pixels="));
+            str += QString::number(pixels);
+        }
+    }
+
+    val = value(EGL_NATIVE_RENDERABLE);
+    if (val != EGL_DONT_CARE) {
+        if (val)
+            addTag(str, QLatin1String(" native-renderable=true"));
+        else
+            addTag(str, QLatin1String(" native-renderable=false"));
+    }
+
+    val = value(EGL_NATIVE_VISUAL_ID);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" visual-id="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_NATIVE_VISUAL_TYPE);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" visual-type="));
+        str += QString::number(val);
+    }
+
+#ifdef EGL_PRESERVED_RESOURCES
+    val = value(EGL_PRESERVED_RESOURCES);
+    if (val != EGL_DONT_CARE) {
+        if (val)
+            addTag(str, QLatin1String(" preserved-resources=true"));
+        else
+            addTag(str, QLatin1String(" preserved-resources=false"));
+    }
+#endif
+
+    val = value(EGL_SAMPLES);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" samples="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_SAMPLE_BUFFERS);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" sample-buffers="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_TRANSPARENT_TYPE);
+    if (val == EGL_TRANSPARENT_RGB) {
+        addTag(str, QLatin1String(" transparent-rgb="));
+        str += QString::number(value(EGL_TRANSPARENT_RED_VALUE));
+        str += QLatin1String(",");
+        str += QString::number(value(EGL_TRANSPARENT_GREEN_VALUE));
+        str += QLatin1String(",");
+        str += QString::number(value(EGL_TRANSPARENT_BLUE_VALUE));
+    }
+
+#if defined(EGL_BIND_TO_TEXTURE_RGB) && defined(EGL_BIND_TO_TEXTURE_RGBA)
+    val = value(EGL_BIND_TO_TEXTURE_RGB);
+    int val2 = value(EGL_BIND_TO_TEXTURE_RGBA);
+    if (val != EGL_DONT_CARE || val2 != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" bind-texture="));
+        if (val == EGL_TRUE)
+            str += QLatin1String("rgb");
+        else
+            str += QLatin1String("no-rgb");
+        if (val2 == EGL_TRUE)
+            str += QLatin1String(",rgba");
+        else
+            str += QLatin1String(",no-rgba");
+    }
+#endif
+
+#ifdef EGL_MIN_SWAP_INTERVAL
+    val = value(EGL_MIN_SWAP_INTERVAL);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" min-swap-interval="));
+        str += QString::number(val);
+    }
+#endif
+
+#ifdef EGL_MIN_SWAP_INTERVAL
+    val = value(EGL_MAX_SWAP_INTERVAL);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" max-swap-interval="));
+        str += QString::number(val);
+    }
+#endif
+
+#ifdef EGL_LUMINANCE_SIZE
+    val = value(EGL_LUMINANCE_SIZE);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" luminance="));
+        str += QString::number(val);
+    }
+#endif
+
+#ifdef EGL_ALPHA_MASK_SIZE
+    val = value(EGL_ALPHA_MASK_SIZE);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" alpha-mask="));
+        str += QString::number(val);
+    }
+#endif
+
+#ifdef EGL_CONFORMANT
+    val = value(EGL_CONFORMANT);
+    if (val != EGL_DONT_CARE) {
+        if (val)
+            addTag(str, QLatin1String(" conformant=true"));
+        else
+            addTag(str, QLatin1String(" conformant=false"));
+    }
+#endif
+
+    return str;
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_OPENGL_ES || QT_OPENVG