qeglplatformcontext.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qeglplatformcontext_p.h"
#include "qeglconvenience_p.h"
#include "qeglpbuffer_p.h"
#include <qpa/qplatformwindow.h>
#include <QtGui/qopenglcontext.h>
#include <QtCore/qdebug.h>
 
#ifdef Q_OS_ANDROID
#include <QtCore/private/qjnihelpers_p.h>
#endif
#ifndef Q_OS_WIN
#include <dlfcn.h>
#endif
 
QT_BEGIN_NAMESPACE
 
// Constants from EGL_KHR_create_context
#ifndef EGL_CONTEXT_MINOR_VERSION_KHR
#define EGL_CONTEXT_MINOR_VERSION_KHR 0x30FB
#endif
#ifndef EGL_CONTEXT_FLAGS_KHR
#define EGL_CONTEXT_FLAGS_KHR 0x30FC
#endif
#ifndef EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR
#define EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR 0x30FD
#endif
#ifndef EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR
#define EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR 0x00000001
#endif
#ifndef EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR
#define EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR 0x00000002
#endif
#ifndef EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR
#define EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR 0x00000001
#endif
#ifndef EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR
#define EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR 0x00000002
#endif
 
// Constants for OpenGL which are not available in the ES headers.
#ifndef GL_CONTEXT_FLAGS
#define GL_CONTEXT_FLAGS 0x821E
#endif
#ifndef GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT
#define GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT 0x0001
#endif
#ifndef GL_CONTEXT_FLAG_DEBUG_BIT
#define GL_CONTEXT_FLAG_DEBUG_BIT 0x00000002
#endif
#ifndef GL_CONTEXT_PROFILE_MASK
#define GL_CONTEXT_PROFILE_MASK 0x9126
#endif
#ifndef GL_CONTEXT_CORE_PROFILE_BIT
#define GL_CONTEXT_CORE_PROFILE_BIT 0x00000001
#endif
#ifndef GL_CONTEXT_COMPATIBILITY_PROFILE_BIT
#define GL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002
#endif
 
QEGLPlatformContext::QEGLPlatformContext(const QSurfaceFormat &format, QPlatformOpenGLContext *share, EGLDisplay display,
                                         EGLConfig *config, Flags flags)
    : m_eglDisplay(display)
    , m_flags(flags)
    , m_ownsContext(true)
{
    m_eglConfig = config ? *config : q_configFromGLFormat(display, format);
 
    m_format = q_glFormatFromConfig(m_eglDisplay, m_eglConfig, format);
    // m_format now has the renderableType() resolved (it cannot be Default anymore)
    // but does not yet contain version, profile, options.
    m_shareContext = share ? static_cast<QEGLPlatformContext *>(share)->m_eglContext : nullptr;
 
    QList<EGLint> contextAttrs;
    contextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
    contextAttrs.append(format.majorVersion());
    const bool hasKHRCreateContext = q_hasEglExtension(m_eglDisplay, "EGL_KHR_create_context");
    if (hasKHRCreateContext) {
        contextAttrs.append(EGL_CONTEXT_MINOR_VERSION_KHR);
        contextAttrs.append(format.minorVersion());
        int flags = 0;
        // The debug bit is supported both for OpenGL and OpenGL ES.
        if (format.testOption(QSurfaceFormat::DebugContext))
            flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
        // The fwdcompat bit is only for OpenGL 3.0+.
        if (m_format.renderableType() == QSurfaceFormat::OpenGL
            && format.majorVersion() >= 3
            && !format.testOption(QSurfaceFormat::DeprecatedFunctions))
            flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
        if (flags) {
            contextAttrs.append(EGL_CONTEXT_FLAGS_KHR);
            contextAttrs.append(flags);
        }
        // Profiles are OpenGL only and mandatory in 3.2+. The value is silently ignored for < 3.2.
        if (m_format.renderableType() == QSurfaceFormat::OpenGL) {
            contextAttrs.append(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR);
            contextAttrs.append(format.profile() == QSurfaceFormat::CoreProfile
                                ? EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR
                                : EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR);
        }
    }
 
#ifdef EGL_EXT_protected_content
    if (format.testOption(QSurfaceFormat::ProtectedContent)) {
        if (q_hasEglExtension(m_eglDisplay, "EGL_EXT_protected_content")) {
            contextAttrs.append(EGL_PROTECTED_CONTENT_EXT);
            contextAttrs.append(EGL_TRUE);
        } else {
            m_format.setOption(QSurfaceFormat::ProtectedContent, false);
        }
    }
#endif
 
    // Special Options for OpenVG surfaces
    if (m_format.renderableType() == QSurfaceFormat::OpenVG) {
        contextAttrs.append(EGL_ALPHA_MASK_SIZE);
        contextAttrs.append(8);
    }
 
    contextAttrs.append(EGL_NONE);
    m_contextAttrs = contextAttrs;
 
    switch (m_format.renderableType()) {
    case QSurfaceFormat::OpenVG:
        m_api = EGL_OPENVG_API;
        break;
#ifdef EGL_VERSION_1_4
    case QSurfaceFormat::OpenGL:
        m_api = EGL_OPENGL_API;
        break;
#endif // EGL_VERSION_1_4
    default:
        m_api = EGL_OPENGL_ES_API;
        break;
    }
 
    eglBindAPI(m_api);
    m_eglContext = eglCreateContext(m_eglDisplay, m_eglConfig, m_shareContext, contextAttrs.constData());
    if (m_eglContext == EGL_NO_CONTEXT && m_shareContext != EGL_NO_CONTEXT) {
        m_shareContext = nullptr;
        m_eglContext = eglCreateContext(m_eglDisplay, m_eglConfig, nullptr, contextAttrs.constData());
    }
 
    if (m_eglContext == EGL_NO_CONTEXT) {
        qWarning("QEGLPlatformContext: Failed to create context: %x", eglGetError());
        return;
    }
 
    static const bool printConfig = qEnvironmentVariableIntValue("QT_QPA_EGLFS_DEBUG");
    if (printConfig) {
        qDebug() << "Created context for format" << format << "with config:";
        q_printEglConfig(m_eglDisplay, m_eglConfig);
 
        static const bool printAllConfigs = qEnvironmentVariableIntValue("QT_QPA_EGLFS_DEBUG") > 1;
        if (printAllConfigs) {
            EGLint numConfigs = 0;
            eglGetConfigs(m_eglDisplay, nullptr, 0, &numConfigs);
            QVector<EGLConfig> configs;
            configs.resize(numConfigs);
            eglGetConfigs(m_eglDisplay, configs.data(), numConfigs, &numConfigs);
            qDebug("\nAll EGLConfigs: count=%d", numConfigs);
            for (EGLint i = 0; i < numConfigs; ++i) {
                qDebug("EGLConfig #%d", i);
                q_printEglConfig(m_eglDisplay, configs[i]);
            }
            qDebug("\n");
        }
    }
 
    // Cannot just call updateFormatFromGL() since it relies on virtuals. Defer it to initialize().
}
 
void QEGLPlatformContext::adopt(EGLContext context, EGLDisplay display, QPlatformOpenGLContext *share)
{
    Q_ASSERT(!m_ownsContext);
 
    m_eglDisplay = display;
 
    // Figure out the EGLConfig.
    EGLint value = 0;
    eglQueryContext(m_eglDisplay, context, EGL_CONFIG_ID, &value);
    EGLint n = 0;
    EGLConfig cfg;
    const EGLint attribs[] = { EGL_CONFIG_ID, value, EGL_NONE };
    if (eglChooseConfig(m_eglDisplay, attribs, &cfg, 1, &n) && n == 1) {
        m_eglConfig = cfg;
        m_format = q_glFormatFromConfig(m_eglDisplay, m_eglConfig);
    } else {
        qWarning("QEGLPlatformContext: Failed to get framebuffer configuration for context");
    }
 
    // Fetch client API type.
    value = 0;
    eglQueryContext(m_eglDisplay, context, EGL_CONTEXT_CLIENT_TYPE, &value);
    if (value == EGL_OPENGL_API || value == EGL_OPENGL_ES_API) {
        // if EGL config supports both OpenGL and OpenGL ES render type,
        // q_glFormatFromConfig() with the default "referenceFormat" parameter
        // will always figure it out as OpenGL render type.
        // We can override it to match user's real render type.
        if (value == EGL_OPENGL_ES_API)
            m_format.setRenderableType(QSurfaceFormat::OpenGLES);
        m_api = value;
        eglBindAPI(m_api);
    } else {
        qWarning("QEGLPlatformContext: Failed to get client API type");
        m_api = EGL_OPENGL_ES_API;
    }
 
    m_eglContext = context;
    m_shareContext = share ? static_cast<QEGLPlatformContext *>(share)->m_eglContext : nullptr;
    updateFormatFromGL();
}
 
void QEGLPlatformContext::initialize()
{
    if (m_eglContext != EGL_NO_CONTEXT)
        updateFormatFromGL();
}
 
// Base implementation for pbuffers. Subclasses will handle the specialized cases for
// platforms without pbuffers.
EGLSurface QEGLPlatformContext::createTemporaryOffscreenSurface()
{
    // Make the context current to ensure the GL version query works. This needs a surface too.
    const EGLint pbufferAttributes[] = {
        EGL_WIDTH, 1,
        EGL_HEIGHT, 1,
        EGL_LARGEST_PBUFFER, EGL_FALSE,
        EGL_NONE
    };
 
    // Cannot just pass m_eglConfig because it may not be suitable for pbuffers. Instead,
    // do what QEGLPbuffer would do: request a config with the same attributes but with
    // PBUFFER_BIT set.
    EGLConfig config = q_configFromGLFormat(m_eglDisplay, m_format, false, EGL_PBUFFER_BIT);
 
    return eglCreatePbufferSurface(m_eglDisplay, config, pbufferAttributes);
}
 
void QEGLPlatformContext::destroyTemporaryOffscreenSurface(EGLSurface surface)
{
    eglDestroySurface(m_eglDisplay, surface);
}
 
void QEGLPlatformContext::runGLChecks()
{
    // Nothing to do here, subclasses may override in order to perform OpenGL
    // queries needing a context.
}
 
void QEGLPlatformContext::updateFormatFromGL()
{
#ifndef QT_NO_OPENGL
    // Have to save & restore to prevent QOpenGLContext::currentContext() from becoming
    // inconsistent after QOpenGLContext::create().
    EGLDisplay prevDisplay = eglGetCurrentDisplay();
    if (prevDisplay == EGL_NO_DISPLAY) // when no context is current
        prevDisplay = m_eglDisplay;
    EGLContext prevContext = eglGetCurrentContext();
    EGLSurface prevSurfaceDraw = eglGetCurrentSurface(EGL_DRAW);
    EGLSurface prevSurfaceRead = eglGetCurrentSurface(EGL_READ);
 
    // Rely on the surfaceless extension, if available. This is beneficial since we can
    // avoid creating an extra pbuffer surface which is apparently troublesome with some
    // drivers (Mesa) when certain attributes are present (multisampling).
    EGLSurface tempSurface = EGL_NO_SURFACE;
    EGLContext tempContext = EGL_NO_CONTEXT;
    if (m_flags.testFlag(NoSurfaceless) || !q_hasEglExtension(m_eglDisplay, "EGL_KHR_surfaceless_context"))
        tempSurface = createTemporaryOffscreenSurface();
 
    EGLBoolean ok = eglMakeCurrent(m_eglDisplay, tempSurface, tempSurface, m_eglContext);
    if (!ok) {
        EGLConfig config = q_configFromGLFormat(m_eglDisplay, m_format, false, EGL_PBUFFER_BIT);
        tempContext = eglCreateContext(m_eglDisplay, config, nullptr, m_contextAttrs.constData());
        if (tempContext != EGL_NO_CONTEXT)
            ok = eglMakeCurrent(m_eglDisplay, tempSurface, tempSurface, tempContext);
    }
    if (ok) {
        if (m_format.renderableType() == QSurfaceFormat::OpenGL
            || m_format.renderableType() == QSurfaceFormat::OpenGLES) {
            const GLubyte *s = glGetString(GL_VERSION);
            if (s) {
                QByteArray version = QByteArray(reinterpret_cast<const char *>(s));
                int major, minor;
                if (QPlatformOpenGLContext::parseOpenGLVersion(version, major, minor)) {
                    m_format.setMajorVersion(major);
                    m_format.setMinorVersion(minor);
                }
            }
            m_format.setProfile(QSurfaceFormat::NoProfile);
            m_format.setOptions(QSurfaceFormat::FormatOptions());
            if (m_format.renderableType() == QSurfaceFormat::OpenGL) {
                // Check profile and options.
                if (m_format.majorVersion() < 3) {
                    m_format.setOption(QSurfaceFormat::DeprecatedFunctions);
                } else {
                    GLint value = 0;
                    glGetIntegerv(GL_CONTEXT_FLAGS, &value);
                    if (!(value & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT))
                        m_format.setOption(QSurfaceFormat::DeprecatedFunctions);
                    if (value & GL_CONTEXT_FLAG_DEBUG_BIT)
                        m_format.setOption(QSurfaceFormat::DebugContext);
                    if (m_format.version() >= qMakePair(3, 2)) {
                        value = 0;
                        glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &value);
                        if (value & GL_CONTEXT_CORE_PROFILE_BIT)
                            m_format.setProfile(QSurfaceFormat::CoreProfile);
                        else if (value & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT)
                            m_format.setProfile(QSurfaceFormat::CompatibilityProfile);
                    }
                }
            }
        }
        runGLChecks();
        eglMakeCurrent(prevDisplay, prevSurfaceDraw, prevSurfaceRead, prevContext);
    } else {
        qWarning("QEGLPlatformContext: Failed to make temporary surface current, format not updated (%x)", eglGetError());
    }
    if (tempSurface != EGL_NO_SURFACE)
        destroyTemporaryOffscreenSurface(tempSurface);
    if (tempContext != EGL_NO_CONTEXT)
        eglDestroyContext(m_eglDisplay, tempContext);
#endif // QT_NO_OPENGL
}
 
bool QEGLPlatformContext::makeCurrent(QPlatformSurface *surface)
{
    Q_ASSERT(surface->surface()->supportsOpenGL());
 
    eglBindAPI(m_api);
 
    EGLSurface eglSurface = eglSurfaceForPlatformSurface(surface);
 
    // shortcut: on some GPUs, eglMakeCurrent is not a cheap operation
    if (eglGetCurrentContext() == m_eglContext &&
        eglGetCurrentDisplay() == m_eglDisplay &&
        eglGetCurrentSurface(EGL_READ) == eglSurface &&
        eglGetCurrentSurface(EGL_DRAW) == eglSurface) {
        return true;
    }
 
    const bool ok = eglMakeCurrent(m_eglDisplay, eglSurface, eglSurface, m_eglContext);
    if (ok) {
        if (!m_swapIntervalEnvChecked) {
            m_swapIntervalEnvChecked = true;
            if (qEnvironmentVariableIsSet("QT_QPA_EGLFS_SWAPINTERVAL")) {
                QByteArray swapIntervalString = qgetenv("QT_QPA_EGLFS_SWAPINTERVAL");
                bool intervalOk;
                const int swapInterval = swapIntervalString.toInt(&intervalOk);
                if (intervalOk)
                    m_swapIntervalFromEnv = swapInterval;
            }
        }
        const int requestedSwapInterval = m_swapIntervalFromEnv >= 0
            ? m_swapIntervalFromEnv
            : surface->format().swapInterval();
        if (requestedSwapInterval >= 0 && m_swapInterval != requestedSwapInterval) {
            m_swapInterval = requestedSwapInterval;
            if (eglSurface != EGL_NO_SURFACE) // skip if using surfaceless context
                eglSwapInterval(eglDisplay(), m_swapInterval);
        }
    } else {
        qWarning("QEGLPlatformContext: eglMakeCurrent failed: %x", eglGetError());
    }
 
    return ok;
}
 
QEGLPlatformContext::~QEGLPlatformContext()
{
    if (m_ownsContext && m_eglContext != EGL_NO_CONTEXT)
        eglDestroyContext(m_eglDisplay, m_eglContext);
 
    m_eglContext = EGL_NO_CONTEXT;
}
 
void QEGLPlatformContext::doneCurrent()
{
    eglBindAPI(m_api);
    bool ok = eglMakeCurrent(m_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
    if (!ok)
        qWarning("QEGLPlatformContext: eglMakeCurrent failed: %x", eglGetError());
}
 
void QEGLPlatformContext::swapBuffers(QPlatformSurface *surface)
{
    eglBindAPI(m_api);
    EGLSurface eglSurface = eglSurfaceForPlatformSurface(surface);
    if (eglSurface != EGL_NO_SURFACE) { // skip if using surfaceless context
        bool ok = eglSwapBuffers(m_eglDisplay, eglSurface);
        if (!ok)
            qWarning("QEGLPlatformContext: eglSwapBuffers failed: %x", eglGetError());
    }
}
 
QFunctionPointer QEGLPlatformContext::getProcAddress(const char *procName)
{
    eglBindAPI(m_api);
    QFunctionPointer proc = (QFunctionPointer) eglGetProcAddress(procName);
#if !defined(Q_OS_WIN) && !defined(Q_OS_INTEGRITY)
    if (!proc)
        proc = (QFunctionPointer) dlsym(RTLD_DEFAULT, procName);
#elif !defined(QT_OPENGL_DYNAMIC)
    // On systems without KHR_get_all_proc_addresses and without
    // dynamic linking there still has to be a way to access the
    // standard GLES functions. QOpenGL(Extra)Functions never makes
    // direct GL API calls since Qt 5.7, so all such workarounds are
    // expected to be handled in the platform plugin.
    if (!proc) {
        static struct StdFunc {
            const char *name;
            QFunctionPointer func;
        } standardFuncs[] = {
#if QT_CONFIG(opengles2)
            { "glBindTexture", (QFunctionPointer) ::glBindTexture },
            { "glBlendFunc", (QFunctionPointer) ::glBlendFunc },
            { "glClear", (QFunctionPointer) ::glClear },
            { "glClearColor", (QFunctionPointer) ::glClearColor },
            { "glClearStencil", (QFunctionPointer) ::glClearStencil },
            { "glColorMask", (QFunctionPointer) ::glColorMask },
            { "glCopyTexImage2D", (QFunctionPointer) ::glCopyTexImage2D },
            { "glCopyTexSubImage2D", (QFunctionPointer) ::glCopyTexSubImage2D },
            { "glCullFace", (QFunctionPointer) ::glCullFace },
            { "glDeleteTextures", (QFunctionPointer) ::glDeleteTextures },
            { "glDepthFunc", (QFunctionPointer) ::glDepthFunc },
            { "glDepthMask", (QFunctionPointer) ::glDepthMask },
            { "glDisable", (QFunctionPointer) ::glDisable },
            { "glDrawArrays", (QFunctionPointer) ::glDrawArrays },
            { "glDrawElements", (QFunctionPointer) ::glDrawElements },
            { "glEnable", (QFunctionPointer) ::glEnable },
            { "glFinish", (QFunctionPointer) ::glFinish },
            { "glFlush", (QFunctionPointer) ::glFlush },
            { "glFrontFace", (QFunctionPointer) ::glFrontFace },
            { "glGenTextures", (QFunctionPointer) ::glGenTextures },
            { "glGetBooleanv", (QFunctionPointer) ::glGetBooleanv },
            { "glGetError", (QFunctionPointer) ::glGetError },
            { "glGetFloatv", (QFunctionPointer) ::glGetFloatv },
            { "glGetIntegerv", (QFunctionPointer) ::glGetIntegerv },
            { "glGetString", (QFunctionPointer) ::glGetString },
            { "glGetTexParameterfv", (QFunctionPointer) ::glGetTexParameterfv },
            { "glGetTexParameteriv", (QFunctionPointer) ::glGetTexParameteriv },
            { "glHint", (QFunctionPointer) ::glHint },
            { "glIsEnabled", (QFunctionPointer) ::glIsEnabled },
            { "glIsTexture", (QFunctionPointer) ::glIsTexture },
            { "glLineWidth", (QFunctionPointer) ::glLineWidth },
            { "glPixelStorei", (QFunctionPointer) ::glPixelStorei },
            { "glPolygonOffset", (QFunctionPointer) ::glPolygonOffset },
            { "glReadPixels", (QFunctionPointer) ::glReadPixels },
            { "glScissor", (QFunctionPointer) ::glScissor },
            { "glStencilFunc", (QFunctionPointer) ::glStencilFunc },
            { "glStencilMask", (QFunctionPointer) ::glStencilMask },
            { "glStencilOp", (QFunctionPointer) ::glStencilOp },
            { "glTexImage2D", (QFunctionPointer) ::glTexImage2D },
            { "glTexParameterf", (QFunctionPointer) ::glTexParameterf },
            { "glTexParameterfv", (QFunctionPointer) ::glTexParameterfv },
            { "glTexParameteri", (QFunctionPointer) ::glTexParameteri },
            { "glTexParameteriv", (QFunctionPointer) ::glTexParameteriv },
            { "glTexSubImage2D", (QFunctionPointer) ::glTexSubImage2D },
            { "glViewport", (QFunctionPointer) ::glViewport },
 
            { "glActiveTexture", (QFunctionPointer) ::glActiveTexture },
            { "glAttachShader", (QFunctionPointer) ::glAttachShader },
            { "glBindAttribLocation", (QFunctionPointer) ::glBindAttribLocation },
            { "glBindBuffer", (QFunctionPointer) ::glBindBuffer },
            { "glBindFramebuffer", (QFunctionPointer) ::glBindFramebuffer },
            { "glBindRenderbuffer", (QFunctionPointer) ::glBindRenderbuffer },
            { "glBlendColor", (QFunctionPointer) ::glBlendColor },
            { "glBlendEquation", (QFunctionPointer) ::glBlendEquation },
            { "glBlendEquationSeparate", (QFunctionPointer) ::glBlendEquationSeparate },
            { "glBlendFuncSeparate", (QFunctionPointer) ::glBlendFuncSeparate },
            { "glBufferData", (QFunctionPointer) ::glBufferData },
            { "glBufferSubData", (QFunctionPointer) ::glBufferSubData },
            { "glCheckFramebufferStatus", (QFunctionPointer) ::glCheckFramebufferStatus },
            { "glCompileShader", (QFunctionPointer) ::glCompileShader },
            { "glCompressedTexImage2D", (QFunctionPointer) ::glCompressedTexImage2D },
            { "glCompressedTexSubImage2D", (QFunctionPointer) ::glCompressedTexSubImage2D },
            { "glCreateProgram", (QFunctionPointer) ::glCreateProgram },
            { "glCreateShader", (QFunctionPointer) ::glCreateShader },
            { "glDeleteBuffers", (QFunctionPointer) ::glDeleteBuffers },
            { "glDeleteFramebuffers", (QFunctionPointer) ::glDeleteFramebuffers },
            { "glDeleteProgram", (QFunctionPointer) ::glDeleteProgram },
            { "glDeleteRenderbuffers", (QFunctionPointer) ::glDeleteRenderbuffers },
            { "glDeleteShader", (QFunctionPointer) ::glDeleteShader },
            { "glDetachShader", (QFunctionPointer) ::glDetachShader },
            { "glDisableVertexAttribArray", (QFunctionPointer) ::glDisableVertexAttribArray },
            { "glEnableVertexAttribArray", (QFunctionPointer) ::glEnableVertexAttribArray },
            { "glFramebufferRenderbuffer", (QFunctionPointer) ::glFramebufferRenderbuffer },
            { "glFramebufferTexture2D", (QFunctionPointer) ::glFramebufferTexture2D },
            { "glGenBuffers", (QFunctionPointer) ::glGenBuffers },
            { "glGenerateMipmap", (QFunctionPointer) ::glGenerateMipmap },
            { "glGenFramebuffers", (QFunctionPointer) ::glGenFramebuffers },
            { "glGenRenderbuffers", (QFunctionPointer) ::glGenRenderbuffers },
            { "glGetActiveAttrib", (QFunctionPointer) ::glGetActiveAttrib },
            { "glGetActiveUniform", (QFunctionPointer) ::glGetActiveUniform },
            { "glGetAttachedShaders", (QFunctionPointer) ::glGetAttachedShaders },
            { "glGetAttribLocation", (QFunctionPointer) ::glGetAttribLocation },
            { "glGetBufferParameteriv", (QFunctionPointer) ::glGetBufferParameteriv },
            { "glGetFramebufferAttachmentParameteriv", (QFunctionPointer) ::glGetFramebufferAttachmentParameteriv },
            { "glGetProgramiv", (QFunctionPointer) ::glGetProgramiv },
            { "glGetProgramInfoLog", (QFunctionPointer) ::glGetProgramInfoLog },
            { "glGetRenderbufferParameteriv", (QFunctionPointer) ::glGetRenderbufferParameteriv },
            { "glGetShaderiv", (QFunctionPointer) ::glGetShaderiv },
            { "glGetShaderInfoLog", (QFunctionPointer) ::glGetShaderInfoLog },
            { "glGetShaderPrecisionFormat", (QFunctionPointer) ::glGetShaderPrecisionFormat },
            { "glGetShaderSource", (QFunctionPointer) ::glGetShaderSource },
            { "glGetUniformfv", (QFunctionPointer) ::glGetUniformfv },
            { "glGetUniformiv", (QFunctionPointer) ::glGetUniformiv },
            { "glGetUniformLocation", (QFunctionPointer) ::glGetUniformLocation },
            { "glGetVertexAttribfv", (QFunctionPointer) ::glGetVertexAttribfv },
            { "glGetVertexAttribiv", (QFunctionPointer) ::glGetVertexAttribiv },
            { "glGetVertexAttribPointerv", (QFunctionPointer) ::glGetVertexAttribPointerv },
            { "glIsBuffer", (QFunctionPointer) ::glIsBuffer },
            { "glIsFramebuffer", (QFunctionPointer) ::glIsFramebuffer },
            { "glIsProgram", (QFunctionPointer) ::glIsProgram },
            { "glIsRenderbuffer", (QFunctionPointer) ::glIsRenderbuffer },
            { "glIsShader", (QFunctionPointer) ::glIsShader },
            { "glLinkProgram", (QFunctionPointer) ::glLinkProgram },
            { "glReleaseShaderCompiler", (QFunctionPointer) ::glReleaseShaderCompiler },
            { "glRenderbufferStorage", (QFunctionPointer) ::glRenderbufferStorage },
            { "glSampleCoverage", (QFunctionPointer) ::glSampleCoverage },
            { "glShaderBinary", (QFunctionPointer) ::glShaderBinary },
            { "glShaderSource", (QFunctionPointer) ::glShaderSource },
            { "glStencilFuncSeparate", (QFunctionPointer) ::glStencilFuncSeparate },
            { "glStencilMaskSeparate", (QFunctionPointer) ::glStencilMaskSeparate },
            { "glStencilOpSeparate", (QFunctionPointer) ::glStencilOpSeparate },
            { "glUniform1f", (QFunctionPointer) ::glUniform1f },
            { "glUniform1fv", (QFunctionPointer) ::glUniform1fv },
            { "glUniform1i", (QFunctionPointer) ::glUniform1i },
            { "glUniform1iv", (QFunctionPointer) ::glUniform1iv },
            { "glUniform2f", (QFunctionPointer) ::glUniform2f },
            { "glUniform2fv", (QFunctionPointer) ::glUniform2fv },
            { "glUniform2i", (QFunctionPointer) ::glUniform2i },
            { "glUniform2iv", (QFunctionPointer) ::glUniform2iv },
            { "glUniform3f", (QFunctionPointer) ::glUniform3f },
            { "glUniform3fv", (QFunctionPointer) ::glUniform3fv },
            { "glUniform3i", (QFunctionPointer) ::glUniform3i },
            { "glUniform3iv", (QFunctionPointer) ::glUniform3iv },
            { "glUniform4f", (QFunctionPointer) ::glUniform4f },
            { "glUniform4fv", (QFunctionPointer) ::glUniform4fv },
            { "glUniform4i", (QFunctionPointer) ::glUniform4i },
            { "glUniform4iv", (QFunctionPointer) ::glUniform4iv },
            { "glUniformMatrix2fv", (QFunctionPointer) ::glUniformMatrix2fv },
            { "glUniformMatrix3fv", (QFunctionPointer) ::glUniformMatrix3fv },
            { "glUniformMatrix4fv", (QFunctionPointer) ::glUniformMatrix4fv },
            { "glUseProgram", (QFunctionPointer) ::glUseProgram },
            { "glValidateProgram", (QFunctionPointer) ::glValidateProgram },
            { "glVertexAttrib1f", (QFunctionPointer) ::glVertexAttrib1f },
            { "glVertexAttrib1fv", (QFunctionPointer) ::glVertexAttrib1fv },
            { "glVertexAttrib2f", (QFunctionPointer) ::glVertexAttrib2f },
            { "glVertexAttrib2fv", (QFunctionPointer) ::glVertexAttrib2fv },
            { "glVertexAttrib3f", (QFunctionPointer) ::glVertexAttrib3f },
            { "glVertexAttrib3fv", (QFunctionPointer) ::glVertexAttrib3fv },
            { "glVertexAttrib4f", (QFunctionPointer) ::glVertexAttrib4f },
            { "glVertexAttrib4fv", (QFunctionPointer) ::glVertexAttrib4fv },
            { "glVertexAttribPointer", (QFunctionPointer) ::glVertexAttribPointer },
 
            { "glClearDepthf", (QFunctionPointer) ::glClearDepthf },
            { "glDepthRangef", (QFunctionPointer) ::glDepthRangef },
#endif // QT_CONFIG(opengles2)
 
#if QT_CONFIG(opengles3)
            { "glBeginQuery", (QFunctionPointer) ::glBeginQuery },
            { "glBeginTransformFeedback", (QFunctionPointer) ::glBeginTransformFeedback },
            { "glBindBufferBase", (QFunctionPointer) ::glBindBufferBase },
            { "glBindBufferRange", (QFunctionPointer) ::glBindBufferRange },
            { "glBindSampler", (QFunctionPointer) ::glBindSampler },
            { "glBindTransformFeedback", (QFunctionPointer) ::glBindTransformFeedback },
            { "glBindVertexArray", (QFunctionPointer) ::glBindVertexArray },
            { "glBlitFramebuffer", (QFunctionPointer) ::glBlitFramebuffer },
            { "glClearBufferfi", (QFunctionPointer) ::glClearBufferfi },
            { "glClearBufferfv", (QFunctionPointer) ::glClearBufferfv },
            { "glClearBufferiv", (QFunctionPointer) ::glClearBufferiv },
            { "glClearBufferuiv", (QFunctionPointer) ::glClearBufferuiv },
            { "glClientWaitSync", (QFunctionPointer) ::glClientWaitSync },
            { "glCompressedTexImage3D", (QFunctionPointer) ::glCompressedTexImage3D },
            { "glCompressedTexSubImage3D", (QFunctionPointer) ::glCompressedTexSubImage3D },
            { "glCopyBufferSubData", (QFunctionPointer) ::glCopyBufferSubData },
            { "glCopyTexSubImage3D", (QFunctionPointer) ::glCopyTexSubImage3D },
            { "glDeleteQueries", (QFunctionPointer) ::glDeleteQueries },
            { "glDeleteSamplers", (QFunctionPointer) ::glDeleteSamplers },
            { "glDeleteSync", (QFunctionPointer) ::glDeleteSync },
            { "glDeleteTransformFeedbacks", (QFunctionPointer) ::glDeleteTransformFeedbacks },
            { "glDeleteVertexArrays", (QFunctionPointer) ::glDeleteVertexArrays },
            { "glDrawArraysInstanced", (QFunctionPointer) ::glDrawArraysInstanced },
            { "glDrawBuffers", (QFunctionPointer) ::glDrawBuffers },
            { "glDrawElementsInstanced", (QFunctionPointer) ::glDrawElementsInstanced },
            { "glDrawRangeElements", (QFunctionPointer) ::glDrawRangeElements },
            { "glEndQuery", (QFunctionPointer) ::glEndQuery },
            { "glEndTransformFeedback", (QFunctionPointer) ::glEndTransformFeedback },
            { "glFenceSync", (QFunctionPointer) ::glFenceSync },
            { "glFlushMappedBufferRange", (QFunctionPointer) ::glFlushMappedBufferRange },
            { "glFramebufferTextureLayer", (QFunctionPointer) ::glFramebufferTextureLayer },
            { "glGenQueries", (QFunctionPointer) ::glGenQueries },
            { "glGenSamplers", (QFunctionPointer) ::glGenSamplers },
            { "glGenTransformFeedbacks", (QFunctionPointer) ::glGenTransformFeedbacks },
            { "glGenVertexArrays", (QFunctionPointer) ::glGenVertexArrays },
            { "glGetActiveUniformBlockName", (QFunctionPointer) ::glGetActiveUniformBlockName },
            { "glGetActiveUniformBlockiv", (QFunctionPointer) ::glGetActiveUniformBlockiv },
            { "glGetActiveUniformsiv", (QFunctionPointer) ::glGetActiveUniformsiv },
            { "glGetBufferParameteri64v", (QFunctionPointer) ::glGetBufferParameteri64v },
            { "glGetBufferPointerv", (QFunctionPointer) ::glGetBufferPointerv },
            { "glGetFragDataLocation", (QFunctionPointer) ::glGetFragDataLocation },
            { "glGetInteger64i_v", (QFunctionPointer) ::glGetInteger64i_v },
            { "glGetInteger64v", (QFunctionPointer) ::glGetInteger64v },
            { "glGetIntegeri_v", (QFunctionPointer) ::glGetIntegeri_v },
            { "glGetInternalformativ", (QFunctionPointer) ::glGetInternalformativ },
            { "glGetProgramBinary", (QFunctionPointer) ::glGetProgramBinary },
            { "glGetQueryObjectuiv", (QFunctionPointer) ::glGetQueryObjectuiv },
            { "glGetQueryiv", (QFunctionPointer) ::glGetQueryiv },
            { "glGetSamplerParameterfv", (QFunctionPointer) ::glGetSamplerParameterfv },
            { "glGetSamplerParameteriv", (QFunctionPointer) ::glGetSamplerParameteriv },
            { "glGetStringi", (QFunctionPointer) ::glGetStringi },
            { "glGetSynciv", (QFunctionPointer) ::glGetSynciv },
            { "glGetTransformFeedbackVarying", (QFunctionPointer) ::glGetTransformFeedbackVarying },
            { "glGetUniformBlockIndex", (QFunctionPointer) ::glGetUniformBlockIndex },
            { "glGetUniformIndices", (QFunctionPointer) ::glGetUniformIndices },
            { "glGetUniformuiv", (QFunctionPointer) ::glGetUniformuiv },
            { "glGetVertexAttribIiv", (QFunctionPointer) ::glGetVertexAttribIiv },
            { "glGetVertexAttribIuiv", (QFunctionPointer) ::glGetVertexAttribIuiv },
            { "glInvalidateFramebuffer", (QFunctionPointer) ::glInvalidateFramebuffer },
            { "glInvalidateSubFramebuffer", (QFunctionPointer) ::glInvalidateSubFramebuffer },
            { "glIsQuery", (QFunctionPointer) ::glIsQuery },
            { "glIsSampler", (QFunctionPointer) ::glIsSampler },
            { "glIsSync", (QFunctionPointer) ::glIsSync },
            { "glIsTransformFeedback", (QFunctionPointer) ::glIsTransformFeedback },
            { "glIsVertexArray", (QFunctionPointer) ::glIsVertexArray },
            { "glMapBufferRange", (QFunctionPointer) ::glMapBufferRange },
            { "glPauseTransformFeedback", (QFunctionPointer) ::glPauseTransformFeedback },
            { "glProgramBinary", (QFunctionPointer) ::glProgramBinary },
            { "glProgramParameteri", (QFunctionPointer) ::glProgramParameteri },
            { "glReadBuffer", (QFunctionPointer) ::glReadBuffer },
            { "glRenderbufferStorageMultisample", (QFunctionPointer) ::glRenderbufferStorageMultisample },
            { "glResumeTransformFeedback", (QFunctionPointer) ::glResumeTransformFeedback },
            { "glSamplerParameterf", (QFunctionPointer) ::glSamplerParameterf },
            { "glSamplerParameterfv", (QFunctionPointer) ::glSamplerParameterfv },
            { "glSamplerParameteri", (QFunctionPointer) ::glSamplerParameteri },
            { "glSamplerParameteriv", (QFunctionPointer) ::glSamplerParameteriv },
            { "glTexImage3D", (QFunctionPointer) ::glTexImage3D },
            { "glTexStorage2D", (QFunctionPointer) ::glTexStorage2D },
            { "glTexStorage3D", (QFunctionPointer) ::glTexStorage3D },
            { "glTexSubImage3D", (QFunctionPointer) ::glTexSubImage3D },
            { "glTransformFeedbackVaryings", (QFunctionPointer) ::glTransformFeedbackVaryings },
            { "glUniform1ui", (QFunctionPointer) ::glUniform1ui },
            { "glUniform1uiv", (QFunctionPointer) ::glUniform1uiv },
            { "glUniform2ui", (QFunctionPointer) ::glUniform2ui },
            { "glUniform2uiv", (QFunctionPointer) ::glUniform2uiv },
            { "glUniform3ui", (QFunctionPointer) ::glUniform3ui },
            { "glUniform3uiv", (QFunctionPointer) ::glUniform3uiv },
            { "glUniform4ui", (QFunctionPointer) ::glUniform4ui },
            { "glUniform4uiv", (QFunctionPointer) ::glUniform4uiv },
            { "glUniformBlockBinding", (QFunctionPointer) ::glUniformBlockBinding },
            { "glUniformMatrix2x3fv", (QFunctionPointer) ::glUniformMatrix2x3fv },
            { "glUniformMatrix2x4fv", (QFunctionPointer) ::glUniformMatrix2x4fv },
            { "glUniformMatrix3x2fv", (QFunctionPointer) ::glUniformMatrix3x2fv },
            { "glUniformMatrix3x4fv", (QFunctionPointer) ::glUniformMatrix3x4fv },
            { "glUniformMatrix4x2fv", (QFunctionPointer) ::glUniformMatrix4x2fv },
            { "glUniformMatrix4x3fv", (QFunctionPointer) ::glUniformMatrix4x3fv },
            { "glUnmapBuffer", (QFunctionPointer) ::glUnmapBuffer },
            { "glVertexAttribDivisor", (QFunctionPointer) ::glVertexAttribDivisor },
            { "glVertexAttribI4i", (QFunctionPointer) ::glVertexAttribI4i },
            { "glVertexAttribI4iv", (QFunctionPointer) ::glVertexAttribI4iv },
            { "glVertexAttribI4ui", (QFunctionPointer) ::glVertexAttribI4ui },
            { "glVertexAttribI4uiv", (QFunctionPointer) ::glVertexAttribI4uiv },
            { "glVertexAttribIPointer", (QFunctionPointer) ::glVertexAttribIPointer },
            { "glWaitSync", (QFunctionPointer) ::glWaitSync },
#endif // QT_CONFIG(opengles3)
 
#if QT_CONFIG(opengles31)
            { "glActiveShaderProgram", (QFunctionPointer) ::glActiveShaderProgram },
            { "glBindImageTexture", (QFunctionPointer) ::glBindImageTexture },
            { "glBindProgramPipeline", (QFunctionPointer) ::glBindProgramPipeline },
            { "glBindVertexBuffer", (QFunctionPointer) ::glBindVertexBuffer },
            { "glCreateShaderProgramv", (QFunctionPointer) ::glCreateShaderProgramv },
            { "glDeleteProgramPipelines", (QFunctionPointer) ::glDeleteProgramPipelines },
            { "glDispatchCompute", (QFunctionPointer) ::glDispatchCompute },
            { "glDispatchComputeIndirect", (QFunctionPointer) ::glDispatchComputeIndirect },
            { "glDrawArraysIndirect", (QFunctionPointer) ::glDrawArraysIndirect },
            { "glDrawElementsIndirect", (QFunctionPointer) ::glDrawElementsIndirect },
            { "glFramebufferParameteri", (QFunctionPointer) ::glFramebufferParameteri },
            { "glGenProgramPipelines", (QFunctionPointer) ::glGenProgramPipelines },
            { "glGetBooleani_v", (QFunctionPointer) ::glGetBooleani_v },
            { "glGetFramebufferParameteriv", (QFunctionPointer) ::glGetFramebufferParameteriv },
            { "glGetMultisamplefv", (QFunctionPointer) ::glGetMultisamplefv },
            { "glGetProgramInterfaceiv", (QFunctionPointer) ::glGetProgramInterfaceiv },
            { "glGetProgramPipelineInfoLog", (QFunctionPointer) ::glGetProgramPipelineInfoLog },
            { "glGetProgramPipelineiv", (QFunctionPointer) ::glGetProgramPipelineiv },
            { "glGetProgramResourceIndex", (QFunctionPointer) ::glGetProgramResourceIndex },
            { "glGetProgramResourceLocation", (QFunctionPointer) ::glGetProgramResourceLocation },
            { "glGetProgramResourceName", (QFunctionPointer) ::glGetProgramResourceName },
            { "glGetProgramResourceiv", (QFunctionPointer) ::glGetProgramResourceiv },
            { "glGetTexLevelParameterfv", (QFunctionPointer) ::glGetTexLevelParameterfv },
            { "glGetTexLevelParameteriv", (QFunctionPointer) ::glGetTexLevelParameteriv },
            { "glIsProgramPipeline", (QFunctionPointer) ::glIsProgramPipeline },
            { "glMemoryBarrier", (QFunctionPointer) ::glMemoryBarrier },
            { "glMemoryBarrierByRegion", (QFunctionPointer) ::glMemoryBarrierByRegion },
            { "glProgramUniform1f", (QFunctionPointer) ::glProgramUniform1f },
            { "glProgramUniform1fv", (QFunctionPointer) ::glProgramUniform1fv },
            { "glProgramUniform1i", (QFunctionPointer) ::glProgramUniform1i },
            { "glProgramUniform1iv", (QFunctionPointer) ::glProgramUniform1iv },
            { "glProgramUniform1ui", (QFunctionPointer) ::glProgramUniform1ui },
            { "glProgramUniform1uiv", (QFunctionPointer) ::glProgramUniform1uiv },
            { "glProgramUniform2f", (QFunctionPointer) ::glProgramUniform2f },
            { "glProgramUniform2fv", (QFunctionPointer) ::glProgramUniform2fv },
            { "glProgramUniform2i", (QFunctionPointer) ::glProgramUniform2i },
            { "glProgramUniform2iv", (QFunctionPointer) ::glProgramUniform2iv },
            { "glProgramUniform2ui", (QFunctionPointer) ::glProgramUniform2ui },
            { "glProgramUniform2uiv", (QFunctionPointer) ::glProgramUniform2uiv },
            { "glProgramUniform3f", (QFunctionPointer) ::glProgramUniform3f },
            { "glProgramUniform3fv", (QFunctionPointer) ::glProgramUniform3fv },
            { "glProgramUniform3i", (QFunctionPointer) ::glProgramUniform3i },
            { "glProgramUniform3iv", (QFunctionPointer) ::glProgramUniform3iv },
            { "glProgramUniform3ui", (QFunctionPointer) ::glProgramUniform3ui },
            { "glProgramUniform3uiv", (QFunctionPointer) ::glProgramUniform3uiv },
            { "glProgramUniform4f", (QFunctionPointer) ::glProgramUniform4f },
            { "glProgramUniform4fv", (QFunctionPointer) ::glProgramUniform4fv },
            { "glProgramUniform4i", (QFunctionPointer) ::glProgramUniform4i },
            { "glProgramUniform4iv", (QFunctionPointer) ::glProgramUniform4iv },
            { "glProgramUniform4ui", (QFunctionPointer) ::glProgramUniform4ui },
            { "glProgramUniform4uiv", (QFunctionPointer) ::glProgramUniform4uiv },
            { "glProgramUniformMatrix2fv", (QFunctionPointer) ::glProgramUniformMatrix2fv },
            { "glProgramUniformMatrix2x3fv", (QFunctionPointer) ::glProgramUniformMatrix2x3fv },
            { "glProgramUniformMatrix2x4fv", (QFunctionPointer) ::glProgramUniformMatrix2x4fv },
            { "glProgramUniformMatrix3fv", (QFunctionPointer) ::glProgramUniformMatrix3fv },
            { "glProgramUniformMatrix3x2fv", (QFunctionPointer) ::glProgramUniformMatrix3x2fv },
            { "glProgramUniformMatrix3x4fv", (QFunctionPointer) ::glProgramUniformMatrix3x4fv },
            { "glProgramUniformMatrix4fv", (QFunctionPointer) ::glProgramUniformMatrix4fv },
            { "glProgramUniformMatrix4x2fv", (QFunctionPointer) ::glProgramUniformMatrix4x2fv },
            { "glProgramUniformMatrix4x3fv", (QFunctionPointer) ::glProgramUniformMatrix4x3fv },
            { "glSampleMaski", (QFunctionPointer) ::glSampleMaski },
            { "glTexStorage2DMultisample", (QFunctionPointer) ::glTexStorage2DMultisample },
            { "glUseProgramStages", (QFunctionPointer) ::glUseProgramStages },
            { "glValidateProgramPipeline", (QFunctionPointer) ::glValidateProgramPipeline },
            { "glVertexAttribBinding", (QFunctionPointer) ::glVertexAttribBinding },
            { "glVertexAttribFormat", (QFunctionPointer) ::glVertexAttribFormat },
            { "glVertexAttribIFormat", (QFunctionPointer) ::glVertexAttribIFormat },
            { "glVertexBindingDivisor", (QFunctionPointer) ::glVertexBindingDivisor },
#endif // QT_CONFIG(opengles31)
 
#if QT_CONFIG(opengles32)
            { "glBlendBarrier", (QFunctionPointer) ::glBlendBarrier },
            { "glCopyImageSubData", (QFunctionPointer) ::glCopyImageSubData },
            { "glDebugMessageControl", (QFunctionPointer) ::glDebugMessageControl },
            { "glDebugMessageInsert", (QFunctionPointer) ::glDebugMessageInsert },
            { "glDebugMessageCallback", (QFunctionPointer) ::glDebugMessageCallback },
            { "glGetDebugMessageLog", (QFunctionPointer) ::glGetDebugMessageLog },
            { "glPushDebugGroup", (QFunctionPointer) ::glPushDebugGroup },
            { "glPopDebugGroup", (QFunctionPointer) ::glPopDebugGroup },
            { "glObjectLabel", (QFunctionPointer) ::glObjectLabel },
            { "glGetObjectLabel", (QFunctionPointer) ::glGetObjectLabel },
            { "glObjectPtrLabel", (QFunctionPointer) ::glObjectPtrLabel },
            { "glGetObjectPtrLabel", (QFunctionPointer) ::glGetObjectPtrLabel },
            { "glGetPointerv", (QFunctionPointer) ::glGetPointerv },
            { "glEnablei", (QFunctionPointer) ::glEnablei },
            { "glDisablei", (QFunctionPointer) ::glDisablei },
            { "glBlendEquationi", (QFunctionPointer) ::glBlendEquationi },
            { "glBlendEquationSeparatei", (QFunctionPointer) ::glBlendEquationSeparatei },
            { "glBlendFunci", (QFunctionPointer) ::glBlendFunci },
            { "glBlendFuncSeparatei", (QFunctionPointer) ::glBlendFuncSeparatei },
            { "glColorMaski", (QFunctionPointer) ::glColorMaski },
            { "glIsEnabledi", (QFunctionPointer) ::glIsEnabledi },
            { "glDrawElementsBaseVertex", (QFunctionPointer) ::glDrawElementsBaseVertex },
            { "glDrawRangeElementsBaseVertex", (QFunctionPointer) ::glDrawRangeElementsBaseVertex },
            { "glDrawElementsInstancedBaseVertex", (QFunctionPointer) ::glDrawElementsInstancedBaseVertex },
            { "glFramebufferTexture", (QFunctionPointer) ::glFramebufferTexture },
            { "glPrimitiveBoundingBox", (QFunctionPointer) ::glPrimitiveBoundingBox },
            { "glGetGraphicsResetStatus", (QFunctionPointer) ::glGetGraphicsResetStatus },
            { "glReadnPixels", (QFunctionPointer) ::glReadnPixels },
            { "glGetnUniformfv", (QFunctionPointer) ::glGetnUniformfv },
            { "glGetnUniformiv", (QFunctionPointer) ::glGetnUniformiv },
            { "glGetnUniformuiv", (QFunctionPointer) ::glGetnUniformuiv },
            { "glMinSampleShading", (QFunctionPointer) ::glMinSampleShading },
            { "glPatchParameteri", (QFunctionPointer) ::glPatchParameteri },
            { "glTexParameterIiv", (QFunctionPointer) ::glTexParameterIiv },
            { "glTexParameterIuiv", (QFunctionPointer) ::glTexParameterIuiv },
            { "glGetTexParameterIiv", (QFunctionPointer) ::glGetTexParameterIiv },
            { "glGetTexParameterIuiv", (QFunctionPointer) ::glGetTexParameterIuiv },
            { "glSamplerParameterIiv", (QFunctionPointer) ::glSamplerParameterIiv },
            { "glSamplerParameterIuiv", (QFunctionPointer) ::glSamplerParameterIuiv },
            { "glGetSamplerParameterIiv", (QFunctionPointer) ::glGetSamplerParameterIiv },
            { "glGetSamplerParameterIuiv", (QFunctionPointer) ::glGetSamplerParameterIuiv },
            { "glTexBuffer", (QFunctionPointer) ::glTexBuffer },
            { "glTexBufferRange", (QFunctionPointer) ::glTexBufferRange },
            { "glTexStorage3DMultisample", (QFunctionPointer) ::glTexStorage3DMultisample },
#endif // QT_CONFIG(opengles32)
        };
 
        for (size_t i = 0; i < sizeof(standardFuncs) / sizeof(StdFunc); ++i) {
            if (!qstrcmp(procName, standardFuncs[i].name)) {
                proc = standardFuncs[i].func;
                break;
            }
        }
    }
#endif
 
    return proc;
}
 
QSurfaceFormat QEGLPlatformContext::format() const
{
    return m_format;
}
 
EGLContext QEGLPlatformContext::eglContext() const
{
    return m_eglContext;
}
 
EGLDisplay QEGLPlatformContext::eglDisplay() const
{
    return m_eglDisplay;
}
 
EGLConfig QEGLPlatformContext::eglConfig() const
{
    return m_eglConfig;
}
 
QT_END_NAMESPACE