TextureCache Methods

Determines whether a texture is registered under the given name.

Gets the pixel size of the texture registered under the given name.

Removes the texture registered under the given name and frees its pixels.

Anything still pointing at the name falls back to looking for an image file called that, so remove a name only once nothing is drawing it.

Registers, or replaces the pixels of, the in-memory texture with the given name.

The bitmap's pixels are copied, so the caller stays free to keep painting into the same bitmap and call this again. Replacing the pixels of a name that is already in use invalidates the copy the display holds on the GPU, so the new pixels appear on the next redraw of any viewport that draws the texture.