我有东芝笔记本(OS Win7的32倍,郎C++)与英特尔显卡HD 3000问题。英特尔HD 3000上正确的OpenGL初始化是什么?
古典单个上下文的OpenGL应用程序工作正常,但在多个的OpenGL上下文在单一的应用程序创建怪异的行为:
- 在旧版本我的应用程序的英特尔驱动程序无法在所有创建第二渲染上下文。
在我的OpenGL基于软件的架构的行为发生重大变化后改变
现在我能够创造第二渲染上下文,但释放它(使用后/关闭窗口)后,司机无法创造任何未来渲染环境。这已经在多个应用程序上进行了测试,并且始终具有相同的行为。我希望通过让第二个上下文始终处于活动状态来解决这个问题,但它不能工作(某种程度上,渲染上下文在英特尔上无效)。为了清晰起见,第二个OpenGL渲染上下文用于打开/保存对话框(预览子窗口)。
驱动程序信息:
Intel(R) HD Graphics 3000
OpenGL ver: 3.1.0 - Build 9.17.10.2932
初始化和退出的OpenGL代码(从我的的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;
}
//------------------------------------------------------------------------------
现在的问题:
我做错了什么?
发动机功能齐全GL,GLSL,VBO,VAO,......并测试多年。奇怪的行为只出现在英特尔。从的nVidia工作正常,并ATI/AMD作品几乎罚款卡(也有一些问题,但它们是相关一如继往地为ATI尤其是对VBO与指标一切正常工作越野车司机)
有没有更好的方法来初始化/退出OpenGL?
如何正确切换不同的渲染上下文?
我使用
wglMakeCurrent(hdc,hrc)
现在,但可能是我失去了一些东西或者有英特尔的一些解决方法这一点。
你是否使用WGL绑定? –
@MattFichman是的 – Spektre