Fix format/type conversion for readPixels.

Change-Id: I5d9d8247fc847e987cbe7d62f7e8641ac4225f50
Reviewed-on: https://swiftshader-review.googlesource.com/4448
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
3 files changed