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glGetIntegerv

OpenGL

Started by ChristophR Jan 28, 2006 at 9:46 AM 2 replies 1.6k views

Original Post

ChristophR

Jan 28, 2006 at 9:46 AM

Hi! I want to find out the maximum texture width which is supported by OpenGL on my system. It tried the following:


GLint texSize = 123;
glGetIntegerv(GL_ALPHA_TEST, &texSize);
std::cout << "Max texture width = " << texSize << std::endl;

The output is "Max texture width = 123", which means that glGetIntegerv has no effect. If I try to retrieve other flags the behaviour ist the same. Can anybody help me? Thanks in advance. rgds

Alex Baker

Jan 28, 2006 at 10:04 AM

ChristophR,

do you have a valid OpenGL context actiaved/initialized ?

ChristophR

Author

ChristophR

Jan 28, 2006 at 10:08 AM

I think I have. But I have edited a few functions. Maybe I have damaged the initialization code.

Thanks for the hint

Brother Bob

Mod

218

Brother Bob

Jan 28, 2006 at 2:13 PM

GL_ALPHA_TEST to ask for maximum texture size? Yeah, that makes sense...

It's not a valid enumerant anyway, so even if you do have a rendering context, the command is ignored and the value should be untouched. For the maximum texture size, pass GL_MAX_TEXTURE_SIZE.

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