问题
I'm using OpenGL ES 1.1 on the iPhone, and I'd like to use the following functions:
glBlendFuncSeparate
glBlendColor
With their related constants. These didn't exist in early iPhone GL implementations, but according to this page: http://developer.apple.com/iphone/library/releasenotes/General/iPhone30APIDiffs/index.html
they should be there in 3.0+, which I'm building for. But I'm getting "implicit definition" warnings. What do I need to do to get those functions?
Thanks!
回答1:
These functions are only defined for OpenGL ES 2.0. glBlendFuncSeparate does have a 1.1 extension version as glBlendFuncSeparateOES, but there is no equivalent for glBlendColor.
回答2:
Extensions are included in the glext.h header files. Specifically, #include <OpenGLES/ES1/glext.h>
来源：https://stackoverflow.com/questions/2814881/iphone-opengl-es-missing-functions-should-be-there-glblendfuncseparate-etc