C++ QOpenGLContext::functions方法代码示例

QOpenGLExtensionMatcher::QOpenGLExtensionMatcher()
{
    QOpenGLContext *ctx = QOpenGLContext::currentContext();
    QOpenGLFunctions *funcs = ctx->functions();
    const char *extensionStr = 0;

    if (ctx->isOpenGLES() || ctx->format().majorVersion() < 3)
        extensionStr = reinterpret_cast<const char *>(funcs->glGetString(GL_EXTENSIONS));

    if (extensionStr) {
        QByteArray ba(extensionStr);
        QList<QByteArray> extensions = ba.split(' ');
        m_extensions = extensions.toSet();
    } else {
#ifdef QT_OPENGL_3
        // clear error state
        while (funcs->glGetError()) {}

        if (ctx) {
            qt_glGetStringi glGetStringi = (qt_glGetStringi)ctx->getProcAddress("glGetStringi");

            if (!glGetStringi)
                return;

            GLint numExtensions;
            funcs->glGetIntegerv(GL_NUM_EXTENSIONS, &numExtensions);

            for (int i = 0; i < numExtensions; ++i) {
                const char *str = reinterpret_cast<const char *>(glGetStringi(GL_EXTENSIONS, i));
                m_extensions.insert(str);
            }
        }
#endif // QT_OPENGL_3
    }
}

void ShaderEffectSource::bind()
{
    GLint filtering = smooth() ? GL_LINEAR : GL_NEAREST;
    GLuint hwrap = (m_wrapMode == Repeat || m_wrapMode == RepeatHorizontally) ? GL_REPEAT : GL_CLAMP_TO_EDGE;
    GLuint vwrap = (m_wrapMode == Repeat || m_wrapMode == RepeatVertically) ? GL_REPEAT : GL_CLAMP_TO_EDGE;

    QOpenGLContext *context = QOpenGLContext::currentContext();
    QOpenGLFunctions *f = context->functions();
    if (!context->isOpenGLES())
        f->glEnable(GL_TEXTURE_2D);

    if (m_fbo && m_fbo->isValid()) {
        f->glBindTexture(GL_TEXTURE_2D, m_fbo->texture());
    } else {
        m_dirtyTexture = true;
        emit repaintRequired();
        markSourceItemDirty();
        f->glBindTexture(GL_TEXTURE_2D, 0);
    }

    f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filtering);
    f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, smooth() ? GL_LINEAR : GL_NEAREST);
    f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, hwrap);
    f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, vwrap);
}

void PlayerQuickItem::onSynchronize()
{
  if (!m_renderer && m_mpv)
  {
    m_renderer = new PlayerRenderer(m_mpv, window());
    if (!m_renderer->init())
    {
      delete m_renderer;
      m_renderer = NULL;
      emit onFatalError(tr("Could not initialize OpenGL."));
      return;
    }
    connect(window(), &QQuickWindow::beforeRendering, m_renderer, &PlayerRenderer::render, Qt::DirectConnection);
    connect(window(), &QQuickWindow::frameSwapped, m_renderer, &PlayerRenderer::swap, Qt::DirectConnection);
    window()->setPersistentOpenGLContext(true);
    window()->setPersistentSceneGraph(true);
    window()->setClearBeforeRendering(false);
    m_debugInfo = "";
    QOpenGLContext* glctx = QOpenGLContext::currentContext();
    if (glctx && glctx->isValid())
    {
      m_debugInfo += "\nOpenGL:\n";
      int syms[4] = {GL_VENDOR, GL_RENDERER, GL_VERSION, GL_SHADING_LANGUAGE_VERSION};
      for (auto sym : syms)
      {
        auto s = (char *)glctx->functions()->glGetString(sym);
        if (s)
          m_debugInfo += QString("  ") + QString::fromUtf8(s) + "\n";
      }
      m_debugInfo += "\n";
    }
  }
  if (m_renderer)
    m_renderer->m_size = window()->size() * window()->devicePixelRatio();
}

void KisOpenGL::initialize()
{
    if (initialized) return;

    setDefaultFormat();

    // we need a QSurface active to get our GL functions from the context
    QWindow  surface;
    surface.setSurfaceType( QSurface::OpenGLSurface );
    surface.create();

    QOpenGLContext context;
    context.create();
    context.makeCurrent( &surface );

    QOpenGLFunctions  *funcs = context.functions();
    funcs->initializeOpenGLFunctions();

    qDebug() << "OpenGL Info";
    qDebug() << "  Vendor: " << reinterpret_cast<const char *>(funcs->glGetString(GL_VENDOR));
    qDebug() << "  Renderer: " << reinterpret_cast<const char *>(funcs->glGetString(GL_RENDERER));
    qDebug() << "  Version: " << reinterpret_cast<const char *>(funcs->glGetString(GL_VERSION));
    qDebug() << "  Shading language: " << reinterpret_cast<const char *>(funcs->glGetString(GL_SHADING_LANGUAGE_VERSION));
    qDebug() << "  Requested format: " << QSurfaceFormat::defaultFormat();
    qDebug() << "  Current format:   " << context.format();

    glMajorVersion = context.format().majorVersion();
    glMinorVersion = context.format().minorVersion();
    supportsDeprecatedFunctions = (context.format().options() & QSurfaceFormat::DeprecatedFunctions);

    initialized = true;
}

static bool q_supportsElementIndexUint(QSGRendererInterface::GraphicsApi api)
{
    static bool elementIndexUint = true;
#if QT_CONFIG(opengl)
    if (api == QSGRendererInterface::OpenGL) {
        static bool elementIndexUintChecked = false;
        if (!elementIndexUintChecked) {
            elementIndexUintChecked = true;
            QOpenGLContext *context = QOpenGLContext::currentContext();
            QScopedPointer<QOpenGLContext> dummyContext;
            QScopedPointer<QOffscreenSurface> dummySurface;
            bool ok = true;
            if (!context) {
                dummyContext.reset(new QOpenGLContext);
                dummyContext->create();
                context = dummyContext.data();
                dummySurface.reset(new QOffscreenSurface);
                dummySurface->setFormat(context->format());
                dummySurface->create();
                ok = context->makeCurrent(dummySurface.data());
            }
            if (ok) {
                elementIndexUint = static_cast<QOpenGLExtensions *>(context->functions())->hasOpenGLExtension(
                            QOpenGLExtensions::ElementIndexUint);
            }
        }
    }
#else
    Q_UNUSED(api);
#endif
    return elementIndexUint;
}

QOpenGLConfig::Gpu QOpenGLConfig::Gpu::fromContext()
{
    QOpenGLContext *ctx = QOpenGLContext::currentContext();
    QScopedPointer<QOpenGLContext> tmpContext;
    QScopedPointer<QOffscreenSurface> tmpSurface;
    if (!ctx) {
        tmpContext.reset(new QOpenGLContext);
        if (!tmpContext->create()) {
            qWarning("QOpenGLConfig::Gpu::fromContext: Failed to create temporary context");
            return QOpenGLConfig::Gpu();
        }
        tmpSurface.reset(new QOffscreenSurface);
        tmpSurface->setFormat(tmpContext->format());
        tmpSurface->create();
        tmpContext->makeCurrent(tmpSurface.data());
    }

    QOpenGLConfig::Gpu gpu;
    ctx = QOpenGLContext::currentContext();
    const GLubyte *p = ctx->functions()->glGetString(GL_VENDOR);
    if (p)
        gpu.glVendor = QByteArray(reinterpret_cast<const char *>(p));

    return gpu;
}

 ~QSGRendererVBOGeometryData()
 {
     QOpenGLContext *ctx = QOpenGLContext::currentContext();
     if (!ctx)
         return;
     QOpenGLFunctions *func = ctx->functions();
     if (vertexBuffer)
         func->glDeleteBuffers(1, &vertexBuffer);
     if (indexBuffer)
         func->glDeleteBuffers(1, &indexBuffer);
 }

void
WebView::CreateGLContext() {
  QOpenGLContext* context = window_->GLContext();
  context->makeCurrent(window_);

  static bool firstClearDone = false;
  if (!firstClearDone) {
    QOpenGLFunctions* functions = context->functions();
    Q_ASSERT(functions);
    functions->glClearColor(1.0, 1.0, 1.0, 0.0);
    functions->glClear(GL_COLOR_BUFFER_BIT);
    context->swapBuffers(window_);
    firstClearDone = true;
  }
}

void SSGTexture::bind()
{
    QOpenGLContext *context = QOpenGLContext::currentContext();
    QOpenGLFunctions *funcs = context->functions();
    if (!m_dirty_texture) {
        funcs->glBindTexture(GL_TEXTURE_2D, m_texture_id);
        if ((minMipmapFiltering() != SSGTexture::None || magMipmapFiltering() != SSGTexture::None) && !m_mipmaps_generated) {
            funcs->glGenerateMipmap(GL_TEXTURE_2D);
            m_mipmaps_generated = true;
        }
        updateBindOptions(m_dirty_bind_options);
        m_dirty_bind_options = false;
        return;
    }

    m_dirty_texture = false;

    if (!m_image || !m_image->isValid()) {
        if (m_texture_id && m_owns_texture) {
            funcs->glDeleteTextures(1, &m_texture_id);
        }
        m_texture_id = 0;
        m_texture_size = QSize();
        m_has_alpha = false;

        return;
    }

    if (m_texture_id == 0)
        funcs->glGenTextures(1, &m_texture_id);
    funcs->glBindTexture(GL_TEXTURE_2D, m_texture_id);

    updateBindOptions(m_dirty_bind_options);

    funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, m_texture_size.width(), m_texture_size.height(), 0, GL_RGBA, GL_UNSIGNED_SHORT, m_image->rawData().get());

    if (minMipmapFiltering() != SSGTexture::None || magMipmapFiltering() != SSGTexture::None) {
        funcs->glGenerateMipmap(GL_TEXTURE_2D);
        m_mipmaps_generated = true;
    }

    m_texture_rect = QRectF(0, 0, 1, 1);

    m_dirty_bind_options = false;
//    if (!m_retain_image)
//        m_image.reset();
}

void Widget::renderWindowReady()
{
    QOpenGLContext *context = QOpenGLContext::currentContext();
    Q_ASSERT(context);

    QString vendor, renderer, version, glslVersion;
    const GLubyte *p;
    QOpenGLFunctions *f = context->functions();
    if ((p = f->glGetString(GL_VENDOR)))
        vendor = QString::fromLatin1(reinterpret_cast<const char *>(p));
    if ((p = f->glGetString(GL_RENDERER)))
        renderer = QString::fromLatin1(reinterpret_cast<const char *>(p));
    if ((p = f->glGetString(GL_VERSION)))
        version = QString::fromLatin1(reinterpret_cast<const char *>(p));
    if ((p = f->glGetString(GL_SHADING_LANGUAGE_VERSION)))
        glslVersion = QString::fromLatin1(reinterpret_cast<const char *>(p));

    m_output->append(tr("*** Context information ***"));
    m_output->append(tr("Vendor: %1").arg(vendor));
    m_output->append(tr("Renderer: %1").arg(renderer));
    m_output->append(tr("OpenGL version: %1").arg(version));
    m_output->append(tr("GLSL version: %1").arg(glslVersion));

    m_output->append(tr("\n*** QSurfaceFormat from context ***"));
    printFormat(context->format());

    m_output->append(tr("\n*** QSurfaceFormat from window surface ***"));
    printFormat(m_surface->format());

    m_output->append(tr("\n*** Qt build information ***"));
    const char *gltype[] = { "Desktop", "GLES 2", "GLES 1" };
    m_output->append(tr("Qt OpenGL configuration: %1")
                     .arg(QString::fromLatin1(gltype[QOpenGLContext::openGLModuleType()])));
    m_output->append(tr("Qt OpenGL library handle: %1")
                     .arg(QString::number(qintptr(QOpenGLContext::openGLModuleHandle()), 16)));

    QList<QByteArray> extensionList = context->extensions().toList();
    std::sort(extensionList.begin(), extensionList.end());
    m_extensions->append(tr("Found %1 extensions:").arg(extensionList.count()));
    Q_FOREACH (const QByteArray &ext, extensionList)
        m_extensions->append(QString::fromLatin1(ext));

    m_output->moveCursor(QTextCursor::Start);
    m_extensions->moveCursor(QTextCursor::Start);
}

void AtcTexture::bind()
{
    if (m_uploaded && m_texture_id) {
        glBindTexture(GL_TEXTURE_2D, m_texture_id);
        return;
    }

    if (m_texture_id == 0)
        glGenTextures(1, &m_texture_id);
    glBindTexture(GL_TEXTURE_2D, m_texture_id);

#ifndef QT_NO_DEBUG
    while (glGetError() != GL_NO_ERROR) { }
#endif

    QOpenGLContext *ctx = QOpenGLContext::currentContext();
    Q_ASSERT(ctx != 0);
    ctx->functions()->glCompressedTexImage2D(GL_TEXTURE_2D, 0, m_glFormat,
                                             m_size.width(), m_size.height(), 0,
                                             m_sizeInBytes,
                                             m_data.data() + sizeof(DDSFormat));

    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );

#ifndef QT_NO_DEBUG
    // Gracefully fail in case of an error...
    GLuint error = glGetError();
    if (error != GL_NO_ERROR) {
        qDebug () << "glCompressedTexImage2D for compressed texture failed, error: " << error;
        glBindTexture(GL_TEXTURE_2D, 0);
        glDeleteTextures(1, &m_texture_id);
        m_texture_id = 0;
        return;
    }
#endif

    m_uploaded = true;
    updateBindOptions(true);
}

void KisMirrorAxis::drawDecoration(QPainter& gc, const QRectF& updateArea, const KisCoordinatesConverter* converter, KisCanvas2* canvas)
{
    Q_UNUSED(updateArea);
    Q_UNUSED(converter);
    Q_UNUSED(canvas);

    gc.setPen(QPen(QColor(0, 0, 0, 128), 1));
    gc.setBrush(Qt::white);
    gc.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);

    QOpenGLContext *ctx = QOpenGLContext::currentContext();
    bool hasMultisample = ((gc.paintEngine()->type() == QPaintEngine::OpenGL2) &&
                           (ctx->hasExtension("GL_ARB_multisample")));

    // QPainter cannot anti-alias the edges of circles etc. when using OpenGL
    // So instead, use native OpenGL anti-aliasing when available.
    if (hasMultisample) {
        gc.beginNativePainting();
        ctx->functions()->glEnable(GL_MULTISAMPLE);
        gc.endNativePainting();
    }

    float halfHandleSize = d->handleSize / 2;

    d->recomputeVisibleAxes(gc.viewport());

    if(d->mirrorHorizontal) {
        if (!d->horizontalAxis.isNull()) {
           // QPointF horizontalIndicatorCenter = d->horizontalAxis.unitVector().pointAt(15);
           // QRectF horizontalIndicator = QRectF(horizontalIndicatorCenter.x() - halfHandleSize, horizontalIndicatorCenter.y() - halfHandleSize, d->handleSize, d->handleSize);

            float horizontalHandlePosition = qBound<float>(d->minHandlePosition, d->horizontalHandlePosition, d->horizontalAxis.length() - d->minHandlePosition);
            QPointF horizontalHandleCenter = d->horizontalAxis.unitVector().pointAt(horizontalHandlePosition);
            d->horizontalHandle = QRectF(horizontalHandleCenter.x() - halfHandleSize, horizontalHandleCenter.y() - halfHandleSize, d->handleSize, d->handleSize);

            gc.setPen(QPen(QColor(0, 0, 0, 64), 2, Qt::DashDotDotLine, Qt::RoundCap, Qt::RoundJoin));
            gc.drawLine(d->horizontalAxis);

           // gc.drawEllipse(horizontalIndicator);
          //  gc.drawPixmap(horizontalIndicator.adjusted(5, 5, -5, -5).toRect(), d->horizontalIcon);

            gc.setPen(QPen(QColor(0, 0, 0, 128), 2));
            gc.drawEllipse(d->horizontalHandle);
            gc.drawPixmap(d->horizontalHandle.adjusted(5, 5, -5, -5).toRect(), d->horizontalIcon);

        } else {
            d->horizontalHandle = QRectF();
        }
    }

    if(d->mirrorVertical) {
        if (!d->verticalAxis.isNull()) {

            gc.setPen(QPen(QColor(0, 0, 0, 64), 2, Qt::DashDotDotLine, Qt::RoundCap, Qt::RoundJoin));
            gc.drawLine(d->verticalAxis);


           // QPointF verticalIndicatorCenter = d->verticalAxis.unitVector().pointAt(15);
           // QRectF verticalIndicator = QRectF(verticalIndicatorCenter.x() - halfHandleSize, verticalIndicatorCenter.y() - halfHandleSize, d->handleSize, d->handleSize);

            float verticalHandlePosition = qBound<float>(d->minHandlePosition, d->verticalHandlePosition, d->verticalAxis.length() - d->minHandlePosition);
            QPointF verticalHandleCenter = d->verticalAxis.unitVector().pointAt(verticalHandlePosition);
            d->verticalHandle = QRectF(verticalHandleCenter.x() - halfHandleSize, verticalHandleCenter.y() - halfHandleSize, d->handleSize, d->handleSize);

           // gc.drawEllipse(verticalIndicator);
          //  gc.drawPixmap(verticalIndicator.adjusted(5, 5, -5, -5).toRect(), d->verticalIcon);
            gc.setPen(QPen(QColor(0, 0, 0, 128), 2));
            gc.drawEllipse(d->verticalHandle);
            gc.drawPixmap(d->verticalHandle.adjusted(5, 5, -5, -5).toRect(), d->verticalIcon);
        } else {
            d->verticalHandle = QRectF();
        }
    }

    if (hasMultisample) {
        gc.beginNativePainting();
        ctx->functions()->glDisable(GL_MULTISAMPLE);
        gc.endNativePainting();
    }

}

/*!
    Releases the buffer associated with \a type in the current
    QOpenGLContext.

    This function is a direct call to \c{glBindBuffer(type, 0)}
    for use when the caller does not know which QOpenGLBuffer has
    been bound to the context but wants to make sure that it
    is released.

    \code
    QOpenGLBuffer::release(QOpenGLBuffer::VertexBuffer);
    \endcode
*/
void QOpenGLBuffer::release(QOpenGLBuffer::Type type)
{
    QOpenGLContext *ctx = QOpenGLContext::currentContext();
    if (ctx)
        ctx->functions()->glBindBuffer(GLenum(type), 0);
}

QT_BEGIN_NAMESPACE

QOpenGLTextureHelper::QOpenGLTextureHelper(QOpenGLContext *context)
{
    // Resolve EXT_direct_state_access entry points if present.

    // However, disable it on some systems where DSA is known to be unreliable.
    bool allowDSA = true;
    const char *renderer = reinterpret_cast<const char *>(context->functions()->glGetString(GL_RENDERER));
    // QTBUG-40653, QTBUG-44988
    if (renderer && strstr(renderer, "AMD Radeon HD"))
        allowDSA = false;

    if (allowDSA && !context->isOpenGLES()
        && context->hasExtension(QByteArrayLiteral("GL_EXT_direct_state_access"))) {
        TextureParameteriEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLenum , GLint )>(context->getProcAddress(QByteArrayLiteral("glTextureParameteriEXT")));
        TextureParameterivEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLenum , const GLint *)>(context->getProcAddress(QByteArrayLiteral("glTextureParameterivEXT")));
        TextureParameterfEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLenum , GLfloat )>(context->getProcAddress(QByteArrayLiteral("glTextureParameterfEXT")));
        TextureParameterfvEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLenum , const GLfloat *)>(context->getProcAddress(QByteArrayLiteral("glTextureParameterfvEXT")));
        GenerateTextureMipmapEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum )>(context->getProcAddress(QByteArrayLiteral("glGenerateTextureMipmapEXT")));
        TextureStorage3DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLsizei , GLenum , GLsizei , GLsizei , GLsizei )>(context->getProcAddress(QByteArrayLiteral("glTextureStorage3DEXT")));
        TextureStorage2DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLsizei , GLenum , GLsizei , GLsizei )>(context->getProcAddress(QByteArrayLiteral("glTextureStorage2DEXT")));
        TextureStorage1DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLsizei , GLenum , GLsizei )>(context->getProcAddress(QByteArrayLiteral("glTextureStorage1DEXT")));
        TextureStorage3DMultisampleEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLsizei , GLenum , GLsizei , GLsizei , GLsizei , GLboolean )>(context->getProcAddress(QByteArrayLiteral("glTextureStorage3DMultisampleEXT")));
        TextureStorage2DMultisampleEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLsizei , GLenum , GLsizei , GLsizei , GLboolean )>(context->getProcAddress(QByteArrayLiteral("glTextureStorage2DMultisampleEXT")));
        TextureImage3DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLenum , GLsizei , GLsizei , GLsizei , GLint , GLenum , GLenum , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glTextureImage3DEXT")));
        TextureImage2DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLenum , GLsizei , GLsizei , GLint , GLenum , GLenum , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glTextureImage2DEXT")));
        TextureImage1DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLenum , GLsizei , GLint , GLenum , GLenum , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glTextureImage1DEXT")));
        TextureSubImage3DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLint , GLint , GLint , GLsizei , GLsizei , GLsizei , GLenum , GLenum , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glTextureSubImage3DEXT")));
        TextureSubImage2DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLint , GLint , GLsizei , GLsizei , GLenum , GLenum , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glTextureSubImage2DEXT")));
        TextureSubImage1DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLint , GLsizei , GLenum , GLenum , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glTextureSubImage1DEXT")));
        CompressedTextureSubImage1DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLint , GLsizei , GLenum , GLsizei , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glCompressedTextureSubImage1DEXT")));
        CompressedTextureSubImage2DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLint , GLint , GLsizei , GLsizei , GLenum , GLsizei , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glCompressedTextureSubImage2DEXT")));
        CompressedTextureSubImage3DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLint , GLint , GLint , GLsizei , GLsizei , GLsizei , GLenum , GLsizei , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glCompressedTextureSubImage3DEXT")));
        CompressedTextureImage1DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLenum , GLsizei , GLint , GLsizei , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glCompressedTextureImage1DEXT")));
        CompressedTextureImage2DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLenum , GLsizei , GLsizei , GLint , GLsizei , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glCompressedTextureImage2DEXT")));
        CompressedTextureImage3DEXT = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLint , GLenum , GLsizei , GLsizei , GLsizei , GLint , GLsizei , const GLvoid *)>(context->getProcAddress(QByteArrayLiteral("glCompressedTextureImage3DEXT")));

        // Use the real DSA functions
        TextureParameteri = &QOpenGLTextureHelper::dsa_TextureParameteri;
        TextureParameteriv = &QOpenGLTextureHelper::dsa_TextureParameteriv;
        TextureParameterf = &QOpenGLTextureHelper::dsa_TextureParameterf;
        TextureParameterfv = &QOpenGLTextureHelper::dsa_TextureParameterfv;
        GenerateTextureMipmap = &QOpenGLTextureHelper::dsa_GenerateTextureMipmap;
        TextureStorage3D = &QOpenGLTextureHelper::dsa_TextureStorage3D;
        TextureStorage2D = &QOpenGLTextureHelper::dsa_TextureStorage2D;
        TextureStorage1D = &QOpenGLTextureHelper::dsa_TextureStorage1D;
        TextureStorage3DMultisample = &QOpenGLTextureHelper::dsa_TextureStorage3DMultisample;
        TextureStorage2DMultisample = &QOpenGLTextureHelper::dsa_TextureStorage2DMultisample;
        TextureImage3D = &QOpenGLTextureHelper::dsa_TextureImage3D;
        TextureImage2D = &QOpenGLTextureHelper::dsa_TextureImage2D;
        TextureImage1D = &QOpenGLTextureHelper::dsa_TextureImage1D;
        TextureSubImage3D = &QOpenGLTextureHelper::dsa_TextureSubImage3D;
        TextureSubImage2D = &QOpenGLTextureHelper::dsa_TextureSubImage2D;
        TextureSubImage1D = &QOpenGLTextureHelper::dsa_TextureSubImage1D;
        CompressedTextureSubImage1D = &QOpenGLTextureHelper::dsa_CompressedTextureSubImage1D;
        CompressedTextureSubImage2D = &QOpenGLTextureHelper::dsa_CompressedTextureSubImage2D;
        CompressedTextureSubImage3D = &QOpenGLTextureHelper::dsa_CompressedTextureSubImage3D;
        CompressedTextureImage1D = &QOpenGLTextureHelper::dsa_CompressedTextureImage1D;
        CompressedTextureImage2D = &QOpenGLTextureHelper::dsa_CompressedTextureImage2D;
        CompressedTextureImage3D = &QOpenGLTextureHelper::dsa_CompressedTextureImage3D;
    } else {
        // Use our own DSA emulation
        TextureParameteri = &QOpenGLTextureHelper::qt_TextureParameteri;
        TextureParameteriv = &QOpenGLTextureHelper::qt_TextureParameteriv;
        TextureParameterf = &QOpenGLTextureHelper::qt_TextureParameterf;
        TextureParameterfv = &QOpenGLTextureHelper::qt_TextureParameterfv;
        GenerateTextureMipmap = &QOpenGLTextureHelper::qt_GenerateTextureMipmap;
        TextureStorage3D = &QOpenGLTextureHelper::qt_TextureStorage3D;
        TextureStorage2D = &QOpenGLTextureHelper::qt_TextureStorage2D;
        TextureStorage1D = &QOpenGLTextureHelper::qt_TextureStorage1D;
        TextureStorage3DMultisample = &QOpenGLTextureHelper::qt_TextureStorage3DMultisample;
        TextureStorage2DMultisample = &QOpenGLTextureHelper::qt_TextureStorage2DMultisample;
        TextureImage3D = &QOpenGLTextureHelper::qt_TextureImage3D;
        TextureImage2D = &QOpenGLTextureHelper::qt_TextureImage2D;
        TextureImage1D = &QOpenGLTextureHelper::qt_TextureImage1D;
        TextureSubImage3D = &QOpenGLTextureHelper::qt_TextureSubImage3D;
        TextureSubImage2D = &QOpenGLTextureHelper::qt_TextureSubImage2D;
        TextureSubImage1D = &QOpenGLTextureHelper::qt_TextureSubImage1D;
        CompressedTextureSubImage1D = &QOpenGLTextureHelper::qt_CompressedTextureSubImage1D;
        CompressedTextureSubImage2D = &QOpenGLTextureHelper::qt_CompressedTextureSubImage2D;
        CompressedTextureSubImage3D = &QOpenGLTextureHelper::qt_CompressedTextureSubImage3D;
        CompressedTextureImage1D = &QOpenGLTextureHelper::qt_CompressedTextureImage1D;
        CompressedTextureImage2D = &QOpenGLTextureHelper::qt_CompressedTextureImage2D;
        CompressedTextureImage3D = &QOpenGLTextureHelper::qt_CompressedTextureImage3D;
    }

    // Some DSA functions are part of NV_texture_multisample instead
    if (!context->isOpenGLES()
        && context->hasExtension(QByteArrayLiteral("GL_NV_texture_multisample"))) {
        TextureImage3DMultisampleNV = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLsizei , GLint , GLsizei , GLsizei , GLsizei , GLboolean )>(context->getProcAddress(QByteArrayLiteral("glTextureImage3DMultisampleNV")));
        TextureImage2DMultisampleNV = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint , GLenum , GLsizei , GLint , GLsizei , GLsizei , GLboolean )>(context->getProcAddress(QByteArrayLiteral("glTextureImage2DMultisampleNV")));

        TextureImage3DMultisample = &QOpenGLTextureHelper::dsa_TextureImage3DMultisample;
        TextureImage2DMultisample = &QOpenGLTextureHelper::dsa_TextureImage2DMultisample;
    } else {
        TextureImage3DMultisample = &QOpenGLTextureHelper::qt_TextureImage3DMultisample;
        TextureImage2DMultisample = &QOpenGLTextureHelper::qt_TextureImage2DMultisample;
    }

//.........这里部分代码省略.........

void ResultRecorder::startResults(const QString &id)
{
    // sub process will get all this.
    // safer that way, as then we keep OpenGL (and QGuiApplication) out of the host
    if (!Options::instance.isSubProcess)
        return;

    m_results["id"] = id;

    QString prettyProductName =
#if QT_VERSION >= 0x050400
        QSysInfo::prettyProductName();
#else
#  if defined(Q_OS_IOS)
        QStringLiteral("iOS");
#  elif defined(Q_OS_OSX)
        QString::fromLatin1("OSX %d").arg(QSysInfo::macVersion());
#  elif defined(Q_OS_WIN)
        QString::fromLatin1("Windows %d").arg(QSysInfo::windowsVersion());
#  elif defined(Q_OS_LINUX)
        QStringLiteral("Linux");
#  elif defined(Q_OS_ANDROID)
        QStringLiteral("Android");
#  else
        QStringLiteral("unknown");
#  endif
#endif

    QVariantMap osMap;
    osMap["prettyProductName"] = prettyProductName;
    osMap["platformPlugin"] = QGuiApplication::platformName();
    m_results["os"] = osMap;
    m_results["qt"] = QT_VERSION_STR;
    m_results["command-line"] = qApp->arguments().join(' ');

    // The following code makes the assumption that an OpenGL context the GUI
    // thread will get the same capabilities as the render thread's OpenGL
    // context. Not 100% accurate, but it works...
    QOpenGLContext context;
    context.create();
    QOffscreenSurface surface;
    // In very odd cases, we can get incompatible configs here unless we pass the
    // GL context's format on to the offscreen format.
    surface.setFormat(context.format());
    surface.create();
    if (!context.makeCurrent(&surface)) {
        qWarning() << "failed to acquire GL context to get version info.";
        return;
    }

    QOpenGLFunctions *func = context.functions();
#if QT_VERSION >= 0x050300
    const char *vendor = (const char *) func->glGetString(GL_VENDOR);
    const char *renderer = (const char *) func->glGetString(GL_RENDERER);
    const char *version = (const char *) func->glGetString(GL_VERSION);
#else
    Q_UNUSED(func);
    const char *vendor = (const char *) glGetString(GL_VENDOR);
    const char *renderer = (const char *) glGetString(GL_RENDERER);
    const char *version = (const char *) glGetString(GL_VERSION);
#endif

    if (!Options::instance.printJsonToStdout) {
        std::cout << "ID:          " << id.toStdString() << std::endl;
        std::cout << "OS:          " << prettyProductName.toStdString() << std::endl;
        std::cout << "QPA:         " << QGuiApplication::platformName().toStdString() << std::endl;
        std::cout << "GL_VENDOR:   " << vendor << std::endl;
        std::cout << "GL_RENDERER: " << renderer << std::endl;
        std::cout << "GL_VERSION:  " << version << std::endl;
    }

    QVariantMap glInfo;
    glInfo["vendor"] = vendor;
    glInfo["renderer"] = renderer;
    glInfo["version"] = version;

    m_results["opengl"] = glInfo;

    context.doneCurrent();
}