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glTexParameteri. Call glGenerateMipmap after every change to the texture image data. * clutter/cogl/gles/cogl-gles2-wrapper.h: * clutter/cogl/gles/cogl-gles2-wrapper.c: Added a wrapper for glTexParameteri so that it can ignore requests to set GL_GENERATE_MIPMAP. Added a wrapper for glGenerateMipmap that does nothing on GLES 1