User avatar
RichardUK
Posts: 223
Joined: Fri Jun 01, 2012 5:12 pm

eglGetConfigAttrib returns zero.

Tue Jun 19, 2012 9:47 pm

Code: Select all

const EGLint attrib_list[] =
		{
			EGL_RED_SIZE,			8,
			EGL_GREEN_SIZE,			8,
			EGL_BLUE_SIZE,			8,
			EGL_ALPHA_SIZE,			8,
			EGL_DEPTH_SIZE,			24,
			EGL_RENDERABLE_TYPE,	EGL_OPENGL_ES2_BIT,
			EGL_NONE,				EGL_NONE
		};

		EGLint numConfigs;
		if( !eglChooseConfig(m_display,attrib_list,&m_config,1, &numConfigs) )
		{
			printf("Error: eglGetConfigs() failed\n");
			return false;
		}

		if( numConfigs > 0 )
		{
			EGLint bufSize,r,g,b,a,z,s = 0;

			eglGetConfigAttrib(m_display,&m_config,EGL_BUFFER_SIZE,&bufSize);

			eglGetConfigAttrib(m_display,&m_config,EGL_RED_SIZE,&r);
			eglGetConfigAttrib(m_display,&m_config,EGL_GREEN_SIZE,&g);
			eglGetConfigAttrib(m_display,&m_config,EGL_BLUE_SIZE,&b);
			eglGetConfigAttrib(m_display,&m_config,EGL_ALPHA_SIZE,&a);

			eglGetConfigAttrib(m_display,&m_config,EGL_DEPTH_SIZE,&z);
			eglGetConfigAttrib(m_display,&m_config,EGL_STENCIL_SIZE,&s);

			printf("%d Configs found:\n\tFrame buffer(%d) RGBA(%d %d %d %d)\n\tZBuffer(%d) Z(%d) S(%d)\n\n",numConfigs,bufSize,r,g,b,a,z+s,z,s);
			return true;
		}
The code gets a good config but the printf prints the following


1 Configs found:
Frame buffer(0) RGBA(1073909760 0 0 0)
ZBuffer(0) Z(0) S(0)

Now that can't be correct??? What am I doing wrong?

Ta. :)

dattrax
Posts: 52
Joined: Sat Dec 24, 2011 5:09 pm

Re: eglGetConfigAttrib returns zero.

Wed Jun 20, 2012 4:33 pm

code is wrong.

you need to

Code: Select all

eglGetConfigAttrib(m_display,m_config,EGL_BUFFER_SIZE,&bufSize);

eglGetConfigAttrib(m_display,m_config,EGL_RED_SIZE,&r);
eglGetConfigAttrib(m_display,m_config,EGL_GREEN_SIZE,&g);
eglGetConfigAttrib(m_display,m_config,EGL_BLUE_SIZE,&b);
eglGetConfigAttrib(m_display,m_config,EGL_ALPHA_SIZE,&a);

eglGetConfigAttrib(m_display,m_config,EGL_DEPTH_SIZE,&z);
eglGetConfigAttrib(m_display,m_config,EGL_STENCIL_SIZE,&s);
without the '&' in front of m_config

Jim

User avatar
RichardUK
Posts: 223
Joined: Fri Jun 01, 2012 5:12 pm

Re: eglGetConfigAttrib returns zero.

Sat Jun 23, 2012 4:26 pm

Doh! LoL. Thanks. :) School boy error......

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