小编paw*_*wel的帖子

我想使用原始OpenGL调用在QtQuick场景中绘制单个项目.我决定采取这个问题的建议方法.

我创建了一个Qt Quick项目,QQuickFramebufferObject并将其公开给QML Renderer:(代码基于Qt示例:场景图 - 渲染FBO)

class FboInSGRenderer : public QQuickFramebufferObject {
    Q_OBJECT
public:
    Renderer *createRenderer() const;
};

源文件:

class LogoInFboRenderer : public QQuickFramebufferObject::Renderer {
    public:
        LogoInFboRenderer() { }

        void render() {
            int width = 1, height = 1;
            glEnable(GL_BLEND);
            glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
            glColor4f(0.0, 1.0, 0.0, 0.8);
            glBegin(GL_QUADS);
            glVertex2f(0, 0);
            glVertex2f(width, 0);
            glVertex2f(width, height);
            glVertex2f(0, height);
            glEnd();

            glLineWidth(2.5);
            glColor4f(0.0, 0.0, 0.0, 1.0);
            glBegin(GL_LINES);
            glVertex2f(0, 0);
            glVertex2f(width, height);
            glVertex2f(width, 0);
            glVertex2f(0, height);
            glEnd();

            update();
        } …