Question

您好我最近开始学习win32 / opengl，我设法编写了一个在窗口中显示多色立方体的函数。我的问题是资源泄漏，但我很难过，不确定我究竟忘记删除了什么。

注意我已将其缩小到此功能范围内

void display() 
{
    g.hglrc = wglCreateContext(g.hdc);
    wglMakeCurrent(g.hdc, g.hglrc);

    // make the color a white hue  
    glClearColor(1.0F, 1.0F, 1.0F, 1.0F);

    //  Clear screen and Z-buffer
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Reset transformations
    glLoadIdentity();

    // Rotate when user changes rotate_x and rotate_y
    glRotatef(rotate_x, 1.0, 0.0, 0.0);
    glRotatef(rotate_y, 0.0, 1.0, 0.0);

    //Multi-colored side - FRONT
    glBegin(GL_POLYGON);
    glColor3f(1.0, 0.0, 0.0);     glVertex3f(0.5, -0.5, -0.5);      // P1 is red
    glColor3f(0.0, 1.0, 0.0);     glVertex3f(0.5, 0.5, -0.5);      // P2 is green
    glColor3f(0.0, 0.0, 1.0);     glVertex3f(-0.5, 0.5, -0.5);      // P3 is blue
    glColor3f(1.0, 0.0, 1.0);     glVertex3f(-0.5, -0.5, -0.5);      // P4 is purple
    glEnd();

    // White side - BACK
    glBegin(GL_POLYGON);
    glColor3f(1.0, 1.0, 1.0);
    glVertex3f(0.5, -0.5, 0.5);
    glVertex3f(0.5, 0.5, 0.5);
    glVertex3f(-0.5, 0.5, 0.5);
    glVertex3f(-0.5, -0.5, 0.5);
    glEnd();

    // Purple side - RIGHT
    glBegin(GL_POLYGON);
    glColor3f(1.0, 0.0, 1.0);
    glVertex3f(0.5, -0.5, -0.5);
    glVertex3f(0.5, 0.5, -0.5);
    glVertex3f(0.5, 0.5, 0.5);
    glVertex3f(0.5, -0.5, 0.5);
    glEnd();

    // Green side - LEFT
    glBegin(GL_POLYGON);
    glColor3f(0.0, 1.0, 0.0);
    glVertex3f(-0.5, -0.5, 0.5);
    glVertex3f(-0.5, 0.5, 0.5);
    glVertex3f(-0.5, 0.5, -0.5);
    glVertex3f(-0.5, -0.5, -0.5);
    glEnd();

    // Blue side - TOP
    glBegin(GL_POLYGON);
    glColor3f(0.0, 0.0, 1.0);
    glVertex3f(0.5, 0.5, 0.5);
    glVertex3f(0.5, 0.5, -0.5);
    glVertex3f(-0.5, 0.5, -0.5);
    glVertex3f(-0.5, 0.5, 0.5);
    glEnd();

    // Red side - BOTTOM
    glBegin(GL_POLYGON);
    glColor3f(1.0, 0.0, 0.0);
    glVertex3f(0.5, -0.5, -0.5);
    glVertex3f(0.5, -0.5, 0.5);
    glVertex3f(-0.5, -0.5, 0.5);
    glVertex3f(-0.5, -0.5, -0.5);
    glEnd();

    wglMakeCurrent(NULL, NULL);

    SwapBuffers(g.hdc);
    ReleaseDC(g.hwnd, g.hdc);
    wglDeleteContext(g.hglrc);
}

Answer 1

g.hglrc = wglCreateContext(g.hdc);

不要那样做。

每次需要重绘屏幕时都不会创建渲染上下文。你创建它一次;它应该只在您的窗口消失时消失。

现在，这并不一定证明为什么创建和销毁渲染上下文会留下资源。但这无关紧要;你不应该因为性能而这样做。渲染上下文创建和销毁不是一个快速的过程，也不是它的目的。

资源泄漏opengl / win32

1 个答案: