color blindness enhancement

This is an attempt at improving the experience of
users with color vision impairement.

At this time this feature can only be enabled for
debugging:

  adb shell service call SurfaceFlinger 1014 i32 PARAM

  with PARAM:
   0 : disabled
   1 : protanomaly/protanopia simulation
   2 : deuteranomaly/deuteranopia simulation
   3 : tritanopia/tritanomaly simulation
  11, 12, 13: same as above w/ attempted correction/enhancement

The enhancement algorithm tries to spread the "error"
such that tones that would otherwise appear similar can be
distinguished.

Bug: 9465644

Change-Id: I860f7eed0cb81f54ef9cf24ad78155b6395ade48

1 files changed, 9 insertions, 1 deletions

diff --git a/services/surfaceflinger/RenderEngine/Description.cpp b/services/surfaceflinger/RenderEngine/Description.cpp
index b0325c6..1adcd1f 100644
--- a/services/surfaceflinger/RenderEngine/Description.cpp
+++ b/services/surfaceflinger/RenderEngine/Description.cpp
@@ -29,9 +29,10 @@ namespace android {
 Description::Description() :
     mUniformsDirty(true) {
     mPlaneAlpha = 1.0f;
-    mPremultipliedAlpha = true;
+    mPremultipliedAlpha = false;
     mOpaque = true;
     mTextureEnabled = false;
+    mColorMatrixEnabled = false;
 
     memset(mColor, 0, sizeof(mColor));
 }
@@ -81,4 +82,11 @@ void Description::setProjectionMatrix(const mat4& mtx) {
     mUniformsDirty = true;
 }
 
+void Description::setColorMatrix(const mat4& mtx) {
+    const mat4 identity;
+    mColorMatrix = mtx;
+    mColorMatrixEnabled = (mtx != identity);
+}
+
+
 } /* namespace android */