Bug 1495025 - P4. Add COLOR_16 type r=nical

Depends on D7296

Differential Revision: https://phabricator.services.mozilla.com/D7316

gfx/2d/Tools.h

@@ -118,6 +118,7 @@ SurfaceFormatForColorDepth(ColorDepth aColorDepth)
       break;
     case ColorDepth::COLOR_10:
     case ColorDepth::COLOR_12:
+    case ColorDepth::COLOR_16:
       format = SurfaceFormat::A16;
       break;
     case ColorDepth::UNKNOWN:
@@ -139,6 +140,9 @@ BitDepthForColorDepth(ColorDepth aColorDepth)
     case ColorDepth::COLOR_12:
       depth = 12;
       break;
+    case ColorDepth::COLOR_16:
+      depth = 16;
+      break;
     case ColorDepth::UNKNOWN:
       MOZ_ASSERT_UNREACHABLE("invalid color depth value");
   }
@@ -158,6 +162,9 @@ ColorDepthForBitDepth(uint8_t aBitDepth)
     case 12:
       depth = ColorDepth::COLOR_12;
       break;
+    case 16:
+      depth = ColorDepth::COLOR_16;
+      break;
     default:
       MOZ_ASSERT_UNREACHABLE("invalid color depth value");
   }
@@ -179,6 +186,8 @@ RescalingFactorForColorDepth(ColorDepth aColorDepth)
     case ColorDepth::COLOR_12:
       factor = 16;
       break;
+    case ColorDepth::COLOR_16:
+      break;
     case ColorDepth::UNKNOWN:
       MOZ_ASSERT_UNREACHABLE("invalid color depth value");
   }

gfx/2d/Types.h

@@ -106,6 +106,7 @@ enum class ColorDepth : uint8_t {
   COLOR_8,
   COLOR_10,
   COLOR_12,
+  COLOR_16,
   UNKNOWN
 };
 

gfx/webrender_bindings/WebRenderTypes.h

@@ -864,6 +864,8 @@ static inline wr::WrColorDepth ToWrColorDepth(gfx::ColorDepth aColorDepth) {
       return wr::WrColorDepth::Color10;
     case gfx::ColorDepth::COLOR_12:
       return wr::WrColorDepth::Color12;
+    case gfx::ColorDepth::COLOR_16:
+      return wr::WrColorDepth::Color16;
     default:
       MOZ_ASSERT_UNREACHABLE("Tried to convert invalid color depth value.");
   }