Tuesday, January 25, 2011

OpenGL 3.0 and above deprecated func. and their replacement

Here i am writing a quick reference list for deprecated functionality in OpenGL3.3 and its replacements. I will update this list regularly.

Deprecated functionalityReplacement in OpenGL3.3
Fixed function pipelineShaders
/glMatrixMode/glLoadMatrix/glMultMatrix etc.
Use either a custom matrix library or public libraries like glm.
glTexEnvfCombine textures in anyway using fragment shaders.
gluBuild2DMipmaps Use either GL_GENERATE_MIPMAP texture parameter or the glGenerateMipmap function. Set the max mipmap level and the base mipmap level using
glEnable(GL_POINT_SMOOTH)Use custom shader
glEnable(GL_TEXTURE_2D)No need. Ue glActiveTexture(GL_TEXTUREn) and bind the texture to the nth texture unit.
glVertex*/glColor*/glNormal*/glTexCoord*Use vbo and vao to maintain the vbo states. Drawing is done using glDraw[Arrays,Elements, RangeElements, InterleavedElements etc.] functions.
glPolygonMode(GL_FRONT, GL_LINE);glPolygonMode(GL_BACK, GL_LINE); In OpenGL 3.0 and above core profile, only the combined front and back face enumerant is valid, single enumerant GL_FRONT or GL_BACK raises INVALID_OPERATION. So the only valid call is glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);

[to be contd.]


wolverine said...

Is this list updated ?

Muhammad Mobeen Movania said...

Yes for v 3.0 and above core profile. For texture mapping though you need to use glTexStorage functions rather than glTexImage.

For v 4 and above, if you find anything missing, please add in the comments.

wolverine said...

Thanks for the update on glTexStorage. Was still using glTexImage in GL ES 2.0.

Popular Posts

Copyright (C) 2011 - Movania Muhammad Mobeen. Awesome Inc. theme. Powered by Blogger.