mesa: add support for immutable textures to teximagemultisample()

The new entrypoints will come later, but this adds the actual logic for
supporting immutable multisample textures:

- The immutability flag is set as desired.
- Attempting to modify an immutable multisample texture produces
  INVALID_OPERATION.

Note: The extension spec does not mention adding this behavior to
TexImage*Multisample, but it seems like the reasonable thing to do.

V2: - Cover missing error cases (unsized formats; texture object zero)

Signed-off-by: Chris Forbes <[email protected]>
[V1] Reviewed-by: Eric Anholt <[email protected]>
Reviewed-by: Brian Paul <[email protected]>

0 files changed, 0 insertions, 0 deletions