This class can only be used in combination with [page:WebGLRenderer.copyFramebufferToTexture]().
[page:Number width] -- The width of the texture.
[page:Number height] -- The height of the texture.
[page:Constant format] -- The format used in the texture. See [page:Textures format constants] for other choices.
See the base [page:Texture Texture] class for common properties.
True by default. This is required so that the canvas data is loaded.
See the base [page:Texture Texture] class for common methods.