OpenGLES: How to find Texture Size
opengl-es
Solution
Obvious reaction question: why do you need this information?
Obvious question aside, texture size is not directly exposed. The best you're probably going to be able to do is to use `glTexSubImage` checking for `GL_INVALID_VALUE` to search for the size — my reading of the GLES man page is that width = height = 0 isn't an error condition so you can hunt for the greatest (x,y) that's accepted without actually uploading any data.
Problem
I am playing around with some old OpenGL code and I am having some issues with this... ``` glGetTexParameterfv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &glW); glGetTexParameterfv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &glH); ``` Now I am new to OpenGL but I am guessing this grabs the height and width of the texture. The problem is, OpenGLES doesn't have GL_TEXTURE_WIDTH or HEIGHT. Now I know that the first answer everyone is going to give is "you need to manage this yourself", however, this is a pretty large code base and it would take some serious time to figure this out. My question is... How can I get the width/height of a texture in OpenGLES?