What is gvec4?

Question

As already mentioned, https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/imageLoad.xhtml , it is assumed that there is a gvec4 type. But there is nothing I can do about it. What is this data type?

Answer 1

The term is gvec4used as universal for all types of vectors: floats, signed integers, unsigned integers and doubles. "G" is replaced by the actual type:

• Nothing for floats. ( vec4)
• ifor signed int. ( ivec4)
• ufor unsigned ints. ( uvec4)
• dfor doubles. ( dvec4)

imageLoad . "G" "g" . (, image2d) imageLoad return vec4. (, iimage2d) imageLoad return ivec4. .