I think I found a strange behavior with OGL 1.0 & OGL ES 1.1 :
if a texture is bound and you delete it and create a texture just after, the new old texture number is used (normal) but the texture is flagged as invalid !
The solution is to bind on 0 manually after glDeleteTextures (glBindTexture(GL_TEXTURE_2D,0).
BUT the documentation says "If a texture that is currently bound is deleted, the binding reverts to 0 (the default texture)."
It's the same (wrong) behavior for me on Windows/Android/iOS.
You can test it with these few lines at home. Is it a bug or a wrong documentation ?
Code :GLuint tex; glGenTextures(1,&tex); glBindTexture(GL_TEXTURE_2D,tex); GLboolean vIsTexture = glIsTexture(tex); // returns TRUE glDeleteTextures(1,&tex); glGenTextures(1,&tex); glBindTexture(GL_TEXTURE_2D,tex); vIsTexture = glIsTexture(tex); [B]// returns FALSE, it should not ![/B] glDeleteTextures(1,&tex);