<html><body><p> <pre> Hi CK, On Tue, 2024-05-07 at 05:58 +0000, CK Hu (胡俊光) wrote: > Hi, Shawn: > > On Thu, 2024-05-02 at 18:38 +0800, Shawn Sung wrote: > > From: Hsiao Chien Sung <shawn.sung@mediatek.com> > > > > ETHDR 9-bit alpha should be disabled by default, > > otherwise alpha blending will not work. > > Please explain what is 9-bit alpha. Is ARGB8888 8-bit alpha? I don't > know there are 9-bit alpha. I would like to know which function would > be disabled when you disable 9-bit alpha. > When 9-bit alpha is enabled, the original alpha range 0-255 will be remapped to 0-256 (255 = N/A) for some special case calculation. Checked with the designer, this setting should be always disabled and there will be no side effects. Thanks, Shawn </pre> </p></body></html><pre>************* MEDIATEK Confidentiality Notice ******************** The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you! </pre>