commit a3023d9b44b56454da922786c03747f7f77184c5
author Courtney Goeltzenleuchter <courtneygo@google.com> Tue Mar 14 15:09:30 2017 -0600
committer Courtney Goeltzenleuchter <courtneygo@google.com> Wed Mar 15 08:11:25 2017 -0600
tree 0c593ef9d107650c33f93d94b26beb77e0cbb313
parent 3670b44926bcc89c10f32bbbca9e06373e00392e

Update Display-P3 transfer function

Decided to use same transfer function that Apple is
using for their Display-P3 devices. Difference between
sRGB transfer function and Display-P3 is very small.
We will treat them an synonymous.

Test: make

Change-Id: Id4e52058f2b810b70c46821c5fe6830e623c5491

graphics/common/1.0/types.hal

diff --git a/graphics/common/1.0/types.hal b/graphics/common/1.0/types.hal
index 1ddd892..dfecec1 100644
--- a/graphics/common/1.0/types.hal
+++ b/graphics/common/1.0/types.hal
@@ -1354,10 +1354,12 @@
    *
    * PC/Internet (sRGB) Gamma Correction (GC):
    *
-   *  if Vlinear ≤ 0.0031308
+   *  if Vlinear ≤ 0.0030186
    *    Vnonlinear = 12.92 * Vlinear
    *  else
    *    Vnonlinear = 1.055 * (Vlinear)^(1/2.4) – 0.055
+   *
+   * Note: In most cases sRGB transfer function will be fine.
    */
   DISPLAY_P3 = 9
 };