Question

我的OpenGL渲染有问题。 RAM内存荒谬地增长到整个系统冻结为止。我已经确定，如果我评论整个渲染功能，则根本不会增加内存。因此，问题在于我的OpenGL渲染函数可能正在为某些东西分配内存，而我没有释放它。

您能找出问题所在吗？

PS：if内部的东西实际上只运行一次，因此它的内存分配只发生一次

这是我的OpenGL渲染功能：

void OpenGlVideoQtQuickRenderer::render()
{
    if (this->firstRun) {
        std::cout << "Creating QOpenGLShaderProgram " << std::endl;
        this->firstRun = false;
        program = new QOpenGLShaderProgram();
        initializeOpenGLFunctions();
        //this->m_F  = QOpenGLContext::currentContext()->functions();

        datas[0] = new unsigned char[width*height];     //Y
        datas[1] = new unsigned char[width*height/4];   //U
        datas[2] = new unsigned char[width*height/4];   //V

        std::cout << program->addShaderFromSourceCode(QOpenGLShader::Fragment, tString2) << std::endl;
        std::cout << program->addShaderFromSourceCode(QOpenGLShader::Vertex, vString2) << std::endl;

        program->bindAttributeLocation("vertexIn",A_VER);
        program->bindAttributeLocation("textureIn",T_VER);
        std::cout << "program->link() = " << program->link() << std::endl;

    }
    program->bind();


    glVertexAttribPointer(A_VER, 2, GL_FLOAT, 0, 0, ver);
    glEnableVertexAttribArray(A_VER);

    glVertexAttribPointer(T_VER, 2, GL_FLOAT, 0, 0, tex);
    glEnableVertexAttribArray(T_VER);

    unis[0] = program->uniformLocation("tex_y");
    unis[1] = program->uniformLocation("tex_u");
    unis[2] = program->uniformLocation("tex_v");

    glGenTextures(3, texs);

    //Y
    glBindTexture(GL_TEXTURE_2D, texs[0]);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, 0);

    //U
    glBindTexture(GL_TEXTURE_2D, texs[1]);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, width/2, height / 2, 0, GL_RED, GL_UNSIGNED_BYTE, 0);

    //V
    glBindTexture(GL_TEXTURE_2D, texs[2]);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, width / 2, height / 2, 0, GL_RED, GL_UNSIGNED_BYTE, 0);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, texs[0]);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RED, GL_UNSIGNED_BYTE, datas[0]);
    glUniform1i(unis[0], 0);


    glActiveTexture(GL_TEXTURE0+1);
    glBindTexture(GL_TEXTURE_2D, texs[1]); 
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width/2, height / 2, GL_RED, GL_UNSIGNED_BYTE, datas[1]);
    glUniform1i(unis[1],1);


    glActiveTexture(GL_TEXTURE0+2);
    glBindTexture(GL_TEXTURE_2D, texs[2]);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width / 2, height / 2, GL_RED, GL_UNSIGNED_BYTE, datas[2]);
    glUniform1i(unis[2], 2);

    glDrawArrays(GL_TRIANGLE_STRIP,0,4);
    program->disableAttributeArray(A_VER);
    program->disableAttributeArray(T_VER);
    program->release();
}

Answer 1

该代码在每个帧（glGenTextures）中创建三个新纹理，而从未释放它们（glDeleteTextures）。您可以在render方法的末尾删除它们，或者甚至更好：在第一个块中仅创建一次纹理，然后仅将新数据上传到它们。

仅作记录：通过在glVertexAttribPointer中指定地址来从CPU内存中提取仅在OpenGL核心配置文件之前有效。我强烈建议改用“顶点缓冲区对象”。

OpenGL正在泄漏内存。哪个对象没有被释放？

1 个答案: