[Graphics] Align Display P3 transfer function coefficients.

The transfer function of Display P3 should be sRGB transfer function,
previously we defined f as 0.039, however, the sRGB transfer function defines f
as 0.04045. This patch fixes it.

BUG: 116726537
Test: Build, flash and boot

Change-Id: I247092d8ce939aa743f23a1f8688cbaf0874fb99

diff --git a/graphics/java/android/graphics/ColorSpace.java b/graphics/java/android/graphics/ColorSpace.java
index b65fb9c..2e1d81a 100644 (file)
--- a/graphics/java/android/graphics/ColorSpace.java
+++ b/graphics/java/android/graphics/ColorSpace.java
@@ -472,8 +472,8 @@ public abstract class ColorSpace {
          *     <tr>
          *         <td>Electro-optical transfer function (EOTF)</td>
          *         <td colspan="4">\(\begin{equation}
-         *             C_{linear} = \begin{cases}\frac{C_{DisplayP3}}{12.92} & C_{sRGB} \lt 0.039 \\\
-         *             \left( \frac{C_{DisplayP3} + 0.055}{1.055} \right) ^{2.4} & C_{sRGB} \ge 0.039 \end{cases}
+         *             C_{linear} = \begin{cases}\frac{C_{DisplayP3}}{12.92} & C_{sRGB} \lt 0.04045 \\\
+         *             \left( \frac{C_{DisplayP3} + 0.055}{1.055} \right) ^{2.4} & C_{sRGB} \ge 0.04045 \end{cases}
          *             \end{equation}\)
          *         </td>
          *     </tr>
@@ -1484,7 +1484,7 @@ public abstract class ColorSpace {
                 "Display P3",
                 new float[] { 0.680f, 0.320f, 0.265f, 0.690f, 0.150f, 0.060f },
                 ILLUMINANT_D65,
-                new Rgb.TransferParameters(1 / 1.055, 0.055 / 1.055, 1 / 12.92, 0.039, 2.4),
+                new Rgb.TransferParameters(1 / 1.055, 0.055 / 1.055, 1 / 12.92, 0.04045, 2.4),
                 Named.DISPLAY_P3.ordinal()
         );
         sNamedColorSpaces[Named.NTSC_1953.ordinal()] = new ColorSpace.Rgb(