程序没有内存泄露，但是内存使用越来越多

Question

图形方面的程序
程序框架采用MFC的单文档视图结构，在View中是一个OpenGL渲染环境程序经常打开一个模态对话框，对话框中也有OpenGL渲染环境，每次打开、关闭对话框之后，在"任务管理器"中察看程序总是占用更多的内存不知道是怎么回事大家谁帮忙回答一下

Answer 1

也许是你没有使用正确使用opengl,或者忘了调用什么清理函数之类的

Answer 2

对于绘图，需要注意的主要是一些绘图句柄对象的释放。比如画笔，刷子等等。当不需要使用时，请及时DeleteObject

Answer 3

// OpenGL.cpp : implementation file
//#include "stdafx.h"
//#include "MyDlgOpenGLdlg.h"
#include "OpenGL.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/////////////////////////////////////////////////////////////////////////////
// COpenGLCOpenGL::COpenGL()
{
//给成员变量赋初值
step=0.0;
s=0.1;
}COpenGL::~COpenGL()
{
wglMakeCurrent(NULL, NULL) ; 
wglDeleteContext(hglrc); //删除渲染描述表
::ReleaseDC (m_hWnd, hdc) ; //释放设备描述表}
BEGIN_MESSAGE_MAP(COpenGL, CWnd)
//{{AFX_MSG_MAP(COpenGL)
ON_WM_CREATE()
ON_WM_PAINT()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()////////////////////////////////////////////////////////////////////////////
// 设置像素格式函数
int COpenGL::MySetPixelFormat(HDC hdc)
{
PIXELFORMATDESCRIPTOR pfd = { 
    sizeof(PIXELFORMATDESCRIPTOR),    // pfd结构的大小 
    1,                                // 版本号 
    PFD_DRAW_TO_WINDOW |              // 支持在窗口中绘图 
    PFD_SUPPORT_OPENGL |              // 支持 OpenGL 
    PFD_DOUBLEBUFFER,                 // 双缓存模式 
    PFD_TYPE_RGBA,                    // RGBA 颜色模式 
    8,                               // 24 位颜色深度 
    0, 0, 0, 0, 0, 0,                 // 忽略颜色位 
    0,                                // 没有非透明度缓存 
    0,                                // 忽略移位位 
    0,                                // 无累加缓存 
    0, 0, 0, 0,                       // 忽略累加位 
    32,                               // 32 位深度缓存     
    0,                                // 无模板缓存 
    0,                                // 无辅助缓存 
    PFD_MAIN_PLANE,                   // 主层 
    0,                                // 保留 
    0, 0, 0                           // 忽略层,可见性和损毁掩模 
}; 

int  iPixelFormat; 
 
// 为设备描述表得到最匹配的像素格式 
if((iPixelFormat = ChoosePixelFormat(hdc, &pfd)) == 0)
{
MessageBox("ChoosePixelFormat Failed", NULL, MB_OK);
return 0;
}
 
// 设置最匹配的像素格式为当前的像素格式 
if(SetPixelFormat(hdc, iPixelFormat, &pfd) == FALSE)
{
MessageBox("SetPixelFormat Failed", NULL, MB_OK);
return 0;
} return 1;
}
/////////////////////////////////////////////////////////////////////////////
// COpenGL message handlersint COpenGL::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
if (CWnd::OnCreate(lpCreateStruct) == -1)
return -1;

// TODO: Add your specialized creation code here
// 设置当前的绘图像素格式
MySetPixelFormat(::GetDC(m_hWnd)); // 获得绘图描述表
hdc = ::GetDC(m_hWnd);
// 创建渲染描述表
hglrc = wglCreateContext(hdc);
// 使绘图描述表为当前调用现程的当前绘图描述表 

return 0;
}void COpenGL::OnPaint() 
{
//CPaintDC dc(this); // device context for painting

// TODO: Add your message handler code here
//调用OpenGL绘图函数进行图形绘制 wglMakeCurrent(hdc, hglrc);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //清除颜色缓存和深度缓存    s+=0.005;
    if(s>1.0)
s=0.1;
step = step + 1.0;
    if (step > 360.0)
step = step - 360.0;
    glPushMatrix();
glScalef(s,s,s);
    glRotatef(step,0.0,1.0,0.0);
    glRotatef(step,0.0,0.0,1.0);
   glRotatef(step,1.0,0.0,0.0);
    DrawColorBox();
    glPopMatrix();
    glFlush(); SwapBuffers(hdc); wglMakeCurrent(NULL, NULL);

// Do not call CWnd::OnPaint() for painting messages
}void COpenGL::DrawColorBox(void)
{
GLfloat  p1[]={0.5,-0.5,-0.5}, p2[]={0.5,0.5,-0.5},
                p3[]={0.5,0.5,0.5},   p4[]={0.5,-0.5,0.5},
                p5[]={-0.5,-0.5,0.5}, p6[]={-0.5,0.5,0.5},
                p7[]={-0.5,0.5,-0.5}, p8[]={-0.5,-0.5,-0.5}; GLfloat  m1[]={1.0,0.0,0.0}, m2[]={-1.0,0.0,0.0},
m3[]={0.0,1.0,0.0}, m4[]={0.0,-1.0,0.0},
m5[]={0.0,0.0,1.0}, m6[]={0.0,0.0,-1.0};   
GLfloat  c1[]={0.0,0.0,1.0},  c2[]={0.0,1.0,1.0},
                c3[]={1.0,1.0,1.0},  c4[]={1.0,0.0,1.0},
                c5[]={1.0,0.0,0.0},  c6[]={1.0,1.0,0.0},
                c7[]={0.0,1.0,0.0},  c8[]={1.0,1.0,1.0};
              
 
    glBegin (GL_QUADS); //绘制多个四边形
        
  glColor3fv(c1);
         glNormal3fv(m1);
        glVertex3fv(p1);
  glColor3fv(c2);
        glVertex3fv(p2);
  glColor3fv(c3);
        glVertex3fv(p3);
  glColor3fv(c4);
        glVertex3fv(p4);   glColor3fv(c5);
         glNormal3fv(m5);
        glVertex3fv(p5);
  glColor3fv(c6);
        glVertex3fv(p6);
  glColor3fv(c7);
        glVertex3fv(p7);
  glColor3fv(c8);
        glVertex3fv(p8);   glColor3fv(c5);
         glNormal3fv(m3);
        glVertex3fv(p5);
  glColor3fv(c6);
        glVertex3fv(p6);
  glColor3fv(c3);
        glVertex3fv(p3);
  glColor3fv(c4);
        glVertex3fv(p4);   glColor3fv(c1);
         glNormal3fv(m4);
        glVertex3fv(p1);
  glColor3fv(c2);
        glVertex3fv(p2);
  glColor3fv(c7);
        glVertex3fv(p7);
  glColor3fv(c8);
        glVertex3fv(p8);   glColor3fv(c2);
         glNormal3fv(m5);
        glVertex3fv(p2);
  glColor3fv(c3);
        glVertex3fv(p3);
  glColor3fv(c6);
        glVertex3fv(p6);
  glColor3fv(c7);
        glVertex3fv(p7);   glColor3fv(c1);
         glNormal3fv(m6);
        glVertex3fv(p1);
  glColor3fv(c4);
        glVertex3fv(p4);
  glColor3fv(c5);
        glVertex3fv(p5);
  glColor3fv(c8);
        glVertex3fv(p8);   glEnd();
}

Answer 4

MySetPixelFormat(::GetDC(m_hWnd)); // 获得绘图描述表
hdc = ::GetDC(m_hWnd);
改为 // 获得绘图描述表
hdc = ::GetDC(m_hWnd);
MySetPixelFormat（hdc);

Answer 5

OnCreate处2个GetDC
GetDC 调用一次就保存起来,试试是否还有问题,

Answer 6

确定没有内存泄露？
用BoundsChecker查查