C++ QOpenGLFramebufferObjectFormat::setSamples方法代码示例

 QOpenGLFramebufferObject *createFramebufferObject(const QSize &size)
 {
     QOpenGLFramebufferObjectFormat format;
     format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
     format.setSamples(4);
     return new QOpenGLFramebufferObject(size, format);
 }

void TApplication::initializeGL() {

    // Init shaders
    if (!Shader.addShaderFromSourceFile(QGLShader::Vertex, "vert.glsl")) {
        qFatal("failed to load shader vert.glsl");
    }
    if (!Shader.addShaderFromSourceFile(QGLShader::Fragment, "frag.glsl")) {
        qFatal("failed to load shader frag.glsl");
    }
    if (!Shader.link()) {
        qFatal("failed to link shader planet");
    }
    if (!Shader.bind()) {
        qFatal("failed to bind shader");
    }

    // Init framebuffers
    QOpenGLFramebufferObjectFormat format;
    format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
    format.setSamples(8);
    Fbo.reset(new QOpenGLFramebufferObject(WINDOW_WIDTH, WINDOW_HEIGHT, format));

    QOpenGLFramebufferObjectFormat format1;
    format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
    Fbo1.reset(new QOpenGLFramebufferObject(WINDOW_WIDTH, WINDOW_HEIGHT, format1));


    // Load model and textures

    Obj = LoadJsonModel("model.json");
    ObjectSize = Obj.size();

    VertexBuff.reset(new QOpenGLBuffer(QOpenGLBuffer::VertexBuffer));
    VertexBuff->create();
    VertexBuff->bind();
    VertexBuff->setUsagePattern(QOpenGLBuffer::StaticDraw);
    VertexBuff->allocate(Obj.data(), Obj.size() * sizeof(TVertex));
    VertexBuff->release();

    Texture.reset(new QOpenGLTexture(QImage("diffuse.jpg")));
    Texture->bind();
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    Texture->release();

    NormalMap.reset(new QOpenGLTexture(QImage("normal.jpg")));
    NormalMap->bind();
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    NormalMap->release();

    // Initial angles
    AngleX = 0;
    AngleY = 0;
    AngleZ = 0;

    Paused = false;
}

void RenderSurface::render(QPainter *painter)
{
    Q_UNUSED(painter);

    QOpenGLFramebufferObjectFormat fboFormat;
    fboFormat.setSamples(1);
    fboFormat.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);

    const QRect drawRect(0, 0, m_outWidth, m_outHeight);
    const QSize drawRectSize = drawRect.size();
    QOpenGLFramebufferObject fbo(drawRectSize, fboFormat);
    fbo.bind();

    glViewport(0, 0, m_outWidth, m_outHeight);

    glClear(GL_COLOR_BUFFER_BIT);
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

    glEnable(GL_BLEND); 
    glBlendFuncSeparate(GL_ONE, GL_ZERO, GL_ZERO, GL_ONE);

    m_program->bind();

    int texCount = 0;
    for (size_t i = 0; i < sp.size(); ++i) {
      if (sp[i].bind == ShaderParameter::BindTextureSampler) {
        textures[sp[i].name].obj->bind(texCount);
        m_program->setUniformValue(sp[i].name.c_str(), texCount);
        texCount++;
      } else if (sp[i].bind == ShaderParameter::BindTextureResolution) {
        const QImage& image = textures[sp[i].texture].image;
        m_program->setUniformValue(sp[i].name.c_str(), QVector2D(image.width(),image.height()));
      } else if (sp[i].bind == ShaderParameter::BindGlobalTime) {
        m_program->setUniformValue(sp[i].name.c_str(), m_globalTime);
      } else if (sp[i].bind == ShaderParameter::BindOutputResolution) {
        m_program->setUniformValue(sp[i].name.c_str(), QVector2D(m_outWidth,m_outHeight));
      }
    }

    GLfloat vertices[] = {
      -1.0f,  -1.0f, 0.0f,
      1.0f, -1.0f, 0.0f,
      -1.0f, 1.0f, 0.0f,
      1.0f, 1.0f, 0.0f
    };

    glVertexAttribPointer(m_posAttr, 3, GL_FLOAT, GL_FALSE, 0, vertices);

    glEnableVertexAttribArray(0);

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

    glDisableVertexAttribArray(0);

    m_program->release();

    imageFrame = fbo.toImage();
}

QOpenGLFramebufferObject* COglRenderer::createFramebufferObject(const QSize &size)
{
    // create opengl FBO
    QOpenGLFramebufferObjectFormat format;
    format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
    format.setSamples(4);
    m_oglFBO = new QOpenGLFramebufferObject(size, format);

    // return opengl FBO
    return m_oglFBO;
}

std::unique_ptr<QOpenGLFramebufferObject>
_createMultisampledFBO( const QSize& size )
{
    QOpenGLFramebufferObjectFormat format;
    format.setAttachment( QOpenGLFramebufferObject::CombinedDepthStencil );
    format.setSamples( MULTI_SAMPLE_ANTI_ALIASING_SAMPLES );

    auto fbo = make_unique<QOpenGLFramebufferObject>( size, format );
    fbo->bind();
    auto gl = QOpenGLContext::currentContext()->functions();
    gl->glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
    gl->glClear( GL_COLOR_BUFFER_BIT );
    fbo->release();

    return fbo;
}

bool QGLPixelBuffer::makeCurrent()
{
    Q_D(QGLPixelBuffer);
    if (d->invalid)
        return false;
    d->qctx->makeCurrent();
    if (!d->fbo) {
        QOpenGLFramebufferObjectFormat format;
        if (d->req_format.stencil())
            format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
        else if (d->req_format.depth())
            format.setAttachment(QOpenGLFramebufferObject::Depth);
        if (d->req_format.sampleBuffers())
            format.setSamples(d->req_format.samples());
        d->fbo = new QOpenGLFramebufferObject(d->req_size, format);
        d->fbo->bind();
        d->glDevice.setFbo(d->fbo->handle());
        QOpenGLContext::currentContext()->functions()->glViewport(0, 0, d->req_size.width(), d->req_size.height());
    }
    return true;
}

static PyObject *meth_QOpenGLFramebufferObjectFormat_setSamples(PyObject *sipSelf, PyObject *sipArgs)
{
    PyObject *sipParseErr = NULL;

    {
        int a0;
        QOpenGLFramebufferObjectFormat *sipCpp;

        if (sipParseArgs(&sipParseErr, sipArgs, "Bi", &sipSelf, sipType_QOpenGLFramebufferObjectFormat, &sipCpp, &a0))
        {
            sipCpp->setSamples(a0);

            Py_INCREF(Py_None);
            return Py_None;
        }
    }

    /* Raise an exception if the arguments couldn't be parsed. */
    sipNoMethod(sipParseErr, sipName_QOpenGLFramebufferObjectFormat, sipName_setSamples, doc_QOpenGLFramebufferObjectFormat_setSamples);

    return NULL;
}

void GLWidget::paintGL()
{
    QOpenGLFunctions* f = openglContext()->functions();
    int width = this->width() * devicePixelRatio();
    int height = this->height() * devicePixelRatio();

    glDisable(GL_BLEND);
    glDisable(GL_DEPTH_TEST);
    glDepthMask(GL_FALSE);
    glViewport(0, 0, width, height);
    check_error(f);
    QColor color(KdenliveSettings::window_background()); //= QPalette().color(QPalette::Window);
    glClearColor(color.redF(), color.greenF(), color.blueF(), color.alphaF());
    glClear(GL_COLOR_BUFFER_BIT);
    check_error(f);

    if (!m_texture[0]) return;

    // Bind textures.
    for (int i = 0; i < 3; ++i) {
        if (m_texture[i]) {
            glActiveTexture(GL_TEXTURE0 + i);
            glBindTexture(GL_TEXTURE_2D, m_texture[i]);
            check_error(f);
        }
    }

    // Init shader program.
    m_shader->bind();
    if (m_glslManager) {
        m_shader->setUniformValue(m_textureLocation[0], 0);
    } else {
        m_shader->setUniformValue(m_textureLocation[0], 0);
        m_shader->setUniformValue(m_textureLocation[1], 1);
        m_shader->setUniformValue(m_textureLocation[2], 2);
        m_shader->setUniformValue(m_colorspaceLocation, m_monitorProfile->colorspace());
    }
    check_error(f);

    // Setup an orthographic projection.
    QMatrix4x4 projection;
    projection.scale(2.0f / width, 2.0f / height);
    m_shader->setUniformValue(m_projectionLocation, projection);
    check_error(f);

    // Set model view.
    QMatrix4x4 modelView;
    if (m_zoom != 1.0) {
        if (offset().x() || offset().y())
            modelView.translate(-offset().x() * devicePixelRatio(),
                                 offset().y() * devicePixelRatio());
        modelView.scale(zoom(), zoom());
    }
    m_shader->setUniformValue(m_modelViewLocation, modelView);
    check_error(f);

    // Provide vertices of triangle strip.
    QVector<QVector2D> vertices;
    width = m_rect.width() * devicePixelRatio();
    height = m_rect.height() * devicePixelRatio();
    vertices << QVector2D(float(-width)/2.0f, float(-height)/2.0f);
    vertices << QVector2D(float(-width)/2.0f, float( height)/2.0f);
    vertices << QVector2D(float( width)/2.0f, float(-height)/2.0f);
    vertices << QVector2D(float( width)/2.0f, float( height)/2.0f);
    m_shader->enableAttributeArray(m_vertexLocation);
    check_error(f);
    m_shader->setAttributeArray(m_vertexLocation, vertices.constData());
    check_error(f);

    // Provide texture coordinates.
    QVector<QVector2D> texCoord;
    texCoord << QVector2D(0.0f, 1.0f);
    texCoord << QVector2D(0.0f, 0.0f);
    texCoord << QVector2D(1.0f, 1.0f);
    texCoord << QVector2D(1.0f, 0.0f);
    m_shader->enableAttributeArray(m_texCoordLocation);
    check_error(f);
    m_shader->setAttributeArray(m_texCoordLocation, texCoord.constData());
    check_error(f);

    // Render
    glDrawArrays(GL_TRIANGLE_STRIP, 0, vertices.size());
    check_error(f);

    // Render RGB frame for analysis
    if (sendFrameForAnalysis) {
        if (!m_fbo || m_fbo->size() != QSize(width, height)) {
            delete m_fbo;
            QOpenGLFramebufferObjectFormat f;
            f.setSamples(0);
            f.setInternalTextureFormat(GL_RGB); //GL_RGBA32F);  // which one is the fastest ?
            m_fbo = new QOpenGLFramebufferObject(width, height, f); //GL_TEXTURE_2D);
        }
        m_fbo->bind();
        glViewport(0, 0, width, height);
        projection.scale((double) this->width() / width, (double) this->height() / height);
        m_shader->setUniformValue(m_projectionLocation, projection);
        glDrawArrays(GL_TRIANGLE_STRIP, 0, vertices.size());
        check_error(f);
        m_fbo->release();
//.........这里部分代码省略.........

void SSGQuickLayer::grab()
{
    if (!m_item || m_size.isNull()) {
        delete m_fbo;
        delete m_secondaryFbo;
        m_fbo = m_secondaryFbo = 0;
        m_depthStencilBuffer.clear();
        m_dirtyTexture = false;
        return;
    }
    QSGNode *root = m_item;
    while (root->firstChild() && root->type() != QSGNode::RootNodeType)
        root = root->firstChild();
    if (root->type() != QSGNode::RootNodeType)
        return;

    if (!m_renderer) {
        m_renderer = m_context->createRenderer();
        connect(m_renderer, SIGNAL(sceneGraphChanged()), this, SLOT(markDirtyTexture()));
    }
    m_renderer->setDevicePixelRatio(m_device_pixel_ratio);
    m_renderer->setRootNode(static_cast<QSGRootNode *>(root));

    QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();
    bool deleteFboLater = false;
    if (!m_fbo || m_fbo->size() != m_size || m_fbo->format().internalTextureFormat() != m_format
        || (!m_fbo->format().mipmap() && m_mipmap))
    {
        if (!m_multisamplingChecked) {
            if (m_context->openglContext()->format().samples() <= 1) {
                m_multisampling = false;
            } else {
                const QSet<QByteArray> extensions = m_context->openglContext()->extensions();
                m_multisampling = extensions.contains(QByteArrayLiteral("GL_EXT_framebuffer_multisample"))
                    && extensions.contains(QByteArrayLiteral("GL_EXT_framebuffer_blit"));
            }
            m_multisamplingChecked = true;
        }
        if (m_multisampling) {
            // Don't delete the FBO right away in case it is used recursively.
            deleteFboLater = true;
            delete m_secondaryFbo;
            QOpenGLFramebufferObjectFormat format;

            format.setInternalTextureFormat(m_format);
            format.setSamples(m_context->openglContext()->format().samples());
            m_secondaryFbo = new QOpenGLFramebufferObject(m_size, format);
            m_depthStencilBuffer = m_context->depthStencilBufferForFbo(m_secondaryFbo);
        } else {
            QOpenGLFramebufferObjectFormat format;
            format.setInternalTextureFormat(m_format);
            format.setMipmap(m_mipmap);
            if (m_recursive) {
                deleteFboLater = true;
                delete m_secondaryFbo;
                m_secondaryFbo = new QOpenGLFramebufferObject(m_size, format);
                funcs->glBindTexture(GL_TEXTURE_2D, m_secondaryFbo->texture());
                updateBindOptions(true);
                m_depthStencilBuffer = m_context->depthStencilBufferForFbo(m_secondaryFbo);
            } else {
                delete m_fbo;
                delete m_secondaryFbo;
                m_fbo = new QOpenGLFramebufferObject(m_size, format);
                m_secondaryFbo = 0;
                funcs->glBindTexture(GL_TEXTURE_2D, m_fbo->texture());
                updateBindOptions(true);
                m_depthStencilBuffer = m_context->depthStencilBufferForFbo(m_fbo);
            }
        }
    }

    if (m_recursive && !m_secondaryFbo) {
        // m_fbo already created, m_recursive was just set.
        Q_ASSERT(m_fbo);
        Q_ASSERT(!m_multisampling);

        m_secondaryFbo = new QOpenGLFramebufferObject(m_size, m_fbo->format());
        funcs->glBindTexture(GL_TEXTURE_2D, m_secondaryFbo->texture());
        updateBindOptions(true);
    }

    // Render texture.
    root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip and opacity update.
    m_renderer->nodeChanged(root, QSGNode::DirtyForceUpdate); // Force render list update.

#ifdef QSG_DEBUG_FBO_OVERLAY
    if (qmlFboOverlay()) {
        if (!m_debugOverlay)
            m_debugOverlay = new QSGSimpleRectNode();
        m_debugOverlay->setRect(QRectF(0, 0, m_size.width(), m_size.height()));
        m_debugOverlay->setColor(QColor(0xff, 0x00, 0x80, 0x40));
        root->appendChildNode(m_debugOverlay);
    }
#endif

    m_dirtyTexture = false;

    m_renderer->setDeviceRect(m_size);
    m_renderer->setViewportRect(m_size);
    QRectF mirrored(m_mirrorHorizontal ? m_rect.right() : m_rect.left(),
//.........这里部分代码省略.........

void QSGPainterNode::updateRenderTarget()
{
    if (!m_extensionsChecked) {
        const QSet<QByteArray> extensions = m_context->openglContext()->extensions();
        m_multisamplingSupported = extensions.contains(QByteArrayLiteral("GL_EXT_framebuffer_multisample"))
            && extensions.contains(QByteArrayLiteral("GL_EXT_framebuffer_blit"));
        m_extensionsChecked = true;
    }

    m_dirtyContents = true;

    QQuickPaintedItem::RenderTarget oldTarget = m_actualRenderTarget;
    if (m_preferredRenderTarget == QQuickPaintedItem::Image) {
        m_actualRenderTarget = QQuickPaintedItem::Image;
    } else {
        if (!m_multisamplingSupported && m_smoothPainting)
            m_actualRenderTarget = QQuickPaintedItem::Image;
        else
            m_actualRenderTarget = m_preferredRenderTarget;
    }
    if (oldTarget != m_actualRenderTarget) {
        m_image = QImage();
        delete m_fbo;
        delete m_multisampledFbo;
        delete m_gl_device;
        m_fbo = m_multisampledFbo = 0;
        m_gl_device = 0;
    }

    if (m_actualRenderTarget == QQuickPaintedItem::FramebufferObject ||
            m_actualRenderTarget == QQuickPaintedItem::InvertedYFramebufferObject) {
        const QOpenGLContext *ctx = m_context->openglContext();
        if (m_fbo && !m_dirtyGeometry && (!ctx->format().samples() || !m_multisamplingSupported))
            return;

        if (m_fboSize.isEmpty())
            updateFBOSize();

        delete m_fbo;
        delete m_multisampledFbo;
        m_fbo = m_multisampledFbo = 0;
        if (m_gl_device)
            m_gl_device->setSize(m_fboSize);

        if (m_smoothPainting && ctx->format().samples() && m_multisamplingSupported) {
            {
                QOpenGLFramebufferObjectFormat format;
                format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
                format.setSamples(8);
                m_multisampledFbo = new QOpenGLFramebufferObject(m_fboSize, format);
            }
            {
                QOpenGLFramebufferObjectFormat format;
                format.setAttachment(QOpenGLFramebufferObject::NoAttachment);
                m_fbo = new QOpenGLFramebufferObject(m_fboSize, format);
            }
        } else {
            QOpenGLFramebufferObjectFormat format;
            format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
            m_fbo = new QOpenGLFramebufferObject(m_fboSize, format);
        }
    } else {
        if (!m_image.isNull() && !m_dirtyGeometry)
            return;

        m_image = QImage(m_size, QImage::Format_ARGB32_Premultiplied);
        m_image.fill(Qt::transparent);
    }

    QSGPainterTexture *texture = new QSGPainterTexture;
    if (m_actualRenderTarget == QQuickPaintedItem::Image) {
        texture->setOwnsTexture(true);
        texture->setTextureSize(m_size);
    } else {
        texture->setTextureId(m_fbo->texture());
        texture->setOwnsTexture(false);
        texture->setTextureSize(m_fboSize);
    }

    if (m_texture)
        delete m_texture;

    texture->setTextureSize(m_size);
    m_texture = texture;
}

//.........这里部分代码省略.........
                OnScreenWidget<QWidget> *qWidget =
                    new OnScreenWidget<QWidget>(files.at(j));
                qWidget->setVerboseMode(verboseMode);
                qWidget->setType(type);
                qWidget->setCheckersBackground(checkers_background);
                qWidget->m_commands = content;
                qWidget->resize(width, height);
                qWidget->show();
                activeWidget = qWidget;
                break;
            }

            case ImageWidgetType:
            {
                OnScreenWidget<QWidget> *qWidget = new OnScreenWidget<QWidget>(files.at(j));
                qWidget->setVerboseMode(verboseMode);
                qWidget->setType(type);
                qWidget->setCheckersBackground(checkers_background);
                qWidget->m_commands = content;
                qWidget->resize(width, height);
                qWidget->show();
                activeWidget = qWidget;
                break;

            }
#ifndef QT_NO_OPENGL
            case OpenGLBufferType:
            {
                QWindow win;
                win.setSurfaceType(QSurface::OpenGLSurface);
                win.create();
                QOpenGLFramebufferObjectFormat fmt;
                fmt.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
                fmt.setSamples(4);
                QOpenGLContext ctx;
                ctx.create();
                ctx.makeCurrent(&win);
                QOpenGLFramebufferObject fbo(width, height, fmt);
                fbo.bind();
                QOpenGLPaintDevice pdev(width, height);

                QPainter pt(&pdev);
                pcmd.setPainter(&pt);
                pcmd.setFilePath(fileinfo.absolutePath());
                pcmd.runCommands();
                pt.end();

                QImage image = fbo.toImage();

                QLabel *label = createLabel();
                label->setPixmap(QPixmap::fromImage(image));
                label->resize(label->sizeHint());
                label->show();
                activeWidget = label;
                break;
            }
            case OpenGLType:
            {
                OnScreenWidget<QGLWidget> *qGLWidget = new OnScreenWidget<QGLWidget>(files.at(j));
                qGLWidget->setVerboseMode(verboseMode);
                qGLWidget->setType(type);
                qGLWidget->setCheckersBackground(checkers_background);
                qGLWidget->m_commands = content;
                qGLWidget->resize(width, height);
                qGLWidget->show();
                activeWidget = qGLWidget;