什么是英特尔HD3000上正确的OpenGL初始化？-WhatistheproperOpenGLinitialisationonIntelHD3000?

I have a problem with Intel graphics HD 3000 on Toshiba notebook (OS Win7 x32, lang C++).

我在Toshiba笔记本电脑上安装了英特尔图形HD 3000(OS Win7 x32,lang C ++)。

Classical single context OpenGL applications work fine but on multiple OpenGL contexts in single App creates weird behavior:

经典的单上下文OpenGL应用程序工作正常但在单个App中的多个OpenGL上下文中会产生奇怪的行为:

1. on older versions of my apps the Intel driver cannot create second rendering context at all.

在我的应用程序的旧版本上,英特尔驱动程序根本无法创建第二个渲染上下文。

2. after major changes in my OpenGL based software architecture behavior changed

   在我的基于OpenGL的软件架构行为的重大变化发生变化之后

   now I am able to create second rendering context but after releasing it (after use / close window) the driver cannot create any next rendering context. This has been tested on more than one app and behaves the same all the time. I wanted to get over this by having the second context at all time active but it does not work too (somehow rendering context is invalidated on Intel). For clarity the second OpenGL rendering context is used for Open/Save dialogs (preview sub-windows).

   现在我能够创建第二个渲染上下文但在释放之后(在使用/关闭窗口之后),驱动程序无法创建任何下一个渲染上下文。这已经在多个应用程序上进行了测试,并且始终表现相同。我想通过让第二个上下文始终处于活动状态来克服这个问题,但它也不起作用(某种程度上,渲染上下文在英特尔上无效)。为清楚起见,第二个OpenGL渲染上下文用于打开/保存对话框(预览子窗口)。

Driver info:

Intel(R) HD Graphics 3000
OpenGL ver: 3.1.0 - Build 9.17.10.2932

Init and exit OpenGL code (from my OpenGL engine):

初始化和退出OpenGL代码(来自我的OpenGL引擎):

//------------------------------------------------------------------------------
int OpenGLscreen::init(void *f,int textures)
    {
    if (_init) exit();
    frm=(formtype*)f;
    hdc = GetDC(frm->Handle);       // get device context
    int i;
    if (!_used)
        {
        int i,_pfid=-1,_zbit=0;
        PIXELFORMATDESCRIPTOR _pfd;
        #define pfd_test i=ChoosePixelFormat(hdc,&pfd); DescribePixelFormat(hdc,i,sizeof(_pfd),&_pfd); if (_zbit<_pfd.cDepthBits) { _zbit=_pfd.cDepthBits; _pfid=i; }
        pfd.cColorBits = 32; pfd.cDepthBits = 32; pfd_test;
        pfd.cColorBits = 24; pfd.cDepthBits = 32; pfd_test;
        pfd.cColorBits = 16; pfd.cDepthBits = 32; pfd_test;
        pfd.cColorBits = 32; pfd.cDepthBits = 24; pfd_test;
        pfd.cColorBits = 24; pfd.cDepthBits = 24; pfd_test;
        pfd.cColorBits = 16; pfd.cDepthBits = 24; pfd_test;
        pfd.cColorBits = 32; pfd.cDepthBits = 16; pfd_test;
        pfd.cColorBits = 24; pfd.cDepthBits = 16; pfd_test;
        pfd.cColorBits = 16; pfd.cDepthBits = 16; pfd_test;
        #undef pfd_test
        pfd.cDepthBits = _zbit; // iba koli warningu
        DescribePixelFormat(hdc,_pfid,sizeof(pfd),&pfd);
        pfid=ChoosePixelFormat(hdc,&pfd);
        SetPixelFormat(hdc,pfid,&pfd);
        DescribePixelFormat(hdc,pfid,sizeof(pfd),&pfd);

        znum=1<<(pfd.cDepthBits-1);
        }

    // create current rendering context
    hrc = wglCreateContext(hdc);

    if(hrc == NULL)
        {
        ShowMessage("Could not initialize OpenGL Rendering context !!!");
        _init=0;
        return 0;
        }
    if(wglMakeCurrent(hdc, hrc) == false)
        {
        ShowMessage("Could not make current OpenGL Rendering context !!!");
        wglDeleteContext(hrc);          // destroy rendering context
        _init=0;
        return 0;
        }
    if (!_used) glewInit();
    _init=1;
    _used=1;
    resize(0,0,128,128);

//  glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
//  glFrontFace(GL_CCW);                    // predna strana je proti smeru hod. ruciciek
//  glEnable(GL_CULL_FACE);                 // vynechavaj odvratene steny
//  glEnable(GL_TEXTURE_2D);                // pouzivaj textury, farbu pouzivaj z textury
//  glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
//  glEnable(GL_BLEND);                     // priehladnost
//  glBlendFunc(GL_SRC_ALPHA,GL_DST_ALPHA);
/*
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glEnable(GL_COLOR_MATERIAL);

    GLdouble MaterialAmbient  [] = {0.25, 0.25, 0.25, 1.00};
    GLdouble MaterialDiffuse  [] = {0.25, 0.25, 0.25, 1.00};
    GLdouble MaterialSpecular [] = {0.50, 0.50, 0.50, 1.00};
    GLdouble MaterialShininess[] = {15.0};                  // 0-ufocused, 128 max focus
    glMaterialfv(GL_FRONT, GL_AMBIENT  , MaterialAmbient  );
    glMaterialfv(GL_FRONT, GL_DIFFUSE  , MaterialDiffuse  );
    glMaterialfv(GL_FRONT, GL_SPECULAR , MaterialSpecular );
    glMaterialfv(GL_FRONT, GL_SHININESS, MaterialShininess);
    glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);

    GLdouble LightPosition [] = {0.00, 0.00, 0.00, 0.0};
    GLdouble LightAmbient  [] = {0.10, 0.10, 0.10, 1.0};
    GLdouble LightDiffuse  [] = {0.20, 0.20, 0.20, 1.0};
    GLdouble LightSpecular [] = {1.00, 1.00, 1.00, 1.0};
    glLightfv(GL_LIGHT0,GL_AMBIENT ,LightAmbient );
    glLightfv(GL_LIGHT0,GL_DIFFUSE ,LightDiffuse );
    glLightfv(GL_LIGHT0,GL_SPECULAR,LightSpecular);
    glLightfv(GL_LIGHT0,GL_POSITION,LightPosition);
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, LightAmbient);
*/
    glEnable(GL_DEPTH_TEST);                // Zbuf
    glShadeModel(GL_SMOOTH);                // gourard shading
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);   // background color
    glDepthFunc(GL_LEQUAL);

    const GLubyte *p; char a;               // get extensions list
    extensiOns="";
    #define ext_add if ((extensions!="")&&(extensions[extensions.Length()]!=' ')) extensions+=' '; for (i=0;;i++) { a=p[i]; if (!a) break; extensions+=a; }
    p=glGetString(GL_EXTENSIONS); ext_add;
    if (wglGetExtensionsStringARB) p=wglGetExtensionsStringARB(hdc); ext_add;
    if (wglGetExtensionsStringEXT) p=wglGetExtensionsStringEXT(); ext_add;

//  int hnd=FileCreate("glext.txt"); FileWrite(hnd,scr.extensions.c_str(),scr.extensions.Length()); FileClose(hnd);

    OpenGLtexture txr;
    txrs.alloc(textures);           // allocate textures name space
    font_init(txr);
    fOnt=txrs.add(txr);
    s3dl=txrs.add(txr); txrs.sizes[s3dl]._mode=GL_MODULATE;
    s3dr=txrs.add(txr); txrs.sizes[s3dr]._mode=GL_MODULATE;
    return 1;
    }
//------------------------------------------------------------------------------
void OpenGLscreen::exit()
    {
    if (!_init) return;
    wglMakeCurrent(hdc,hrc);        // use this context if multiple OpenGLs are used
    txrs.free();
    wglMakeCurrent(NULL, NULL);     // release current rendering context
    wglDeleteContext(hrc);          // destroy rendering context
    hrc=NULL;
    _init=0;
    }
//------------------------------------------------------------------------------

now the questions:

现在问题:

1. Am I doing something wrong?

   难道我做错了什么?

   Engine is fully functional GL,GLSL,VBO,VAO,... and tested for years. Weird behavior is present only on Intel. Cards from nVidia works fine and ATI/AMD works almost fine (there are some issues but they are buggy drivers related as always for ATI especially for VBO with indices everything else works fine)

   发动机是功能齐全的GL,GLSL,VBO,VAO ......并经过多年的测试。奇怪的行为仅出现在英特尔上。来自nVidia的卡工作正常并且ATI / AMD工作得很好(有一些问题,但它们是驱动器相关的驱动器,因为ATI总是如此,特别是对于VBO,其他一切工作正常)

2. Is there a better way to init/exit OpenGL?

   有没有更好的方法来初始化/退出OpenGL?

3. How to properly switch between different rendering contexts?

   如何在不同的渲染上下文之间正确切换?

   I am using wglMakeCurrent(hdc,hrc) for now but may be I am missing something or there is some workaround on Intel for this.

   我现在正在使用wglMakeCurrent(hdc,hrc),但可能是我遗漏了一些东西,或者英特尔为此做了一些解决方法。

1 个解决方案