Remove obsolete optimization

Change-Id: I2d43c009c62a7f4a4a2e0a6303bdfa692c4b8c8c
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index c92bead..a755320 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -45,8 +45,7 @@
 #define RAD_TO_DEG (180.0f / 3.14159265f)
 #define MIN_ANGLE 0.001f
 
-// TODO: This should be set in properties
-#define ALPHA_THRESHOLD (0x7f / PANEL_BIT_DEPTH)
+#define ALPHA_THRESHOLD 0
 
 #define FILTER(paint) (paint && paint->isFilterBitmap() ? GL_LINEAR : GL_NEAREST)
 
@@ -449,7 +448,7 @@
 
 int OpenGLRenderer::saveLayerAlpha(float left, float top, float right, float bottom,
         int alpha, int flags) {
-    if (alpha >= 255 - ALPHA_THRESHOLD) {
+    if (alpha >= 255) {
         return saveLayer(left, top, right, bottom, NULL, flags);
     } else {
         SkPaint paint;
diff --git a/libs/hwui/Program.h b/libs/hwui/Program.h
index eb9ee7b..e9c666b 100644
--- a/libs/hwui/Program.h
+++ b/libs/hwui/Program.h
@@ -41,8 +41,8 @@
     #define PROGRAM_LOGD(...)
 #endif
 
-#define COLOR_COMPONENT_THRESHOLD (1.0f - (0.5f / PANEL_BIT_DEPTH))
-#define COLOR_COMPONENT_INV_THRESHOLD (0.5f / PANEL_BIT_DEPTH)
+#define COLOR_COMPONENT_THRESHOLD 1.0f
+#define COLOR_COMPONENT_INV_THRESHOLD 0.0f
 
 #define PROGRAM_KEY_TEXTURE 0x1
 #define PROGRAM_KEY_A8_TEXTURE 0x2
diff --git a/libs/hwui/Properties.h b/libs/hwui/Properties.h
index 7854729..c0311fb 100644
--- a/libs/hwui/Properties.h
+++ b/libs/hwui/Properties.h
@@ -78,9 +78,6 @@
 #define PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD "ro.text_gamma.black_threshold"
 #define PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD "ro.text_gamma.white_threshold"
 
-// TODO: This should be set by a system property
-#define PANEL_BIT_DEPTH 20
-
 // Converts a number of mega-bytes into bytes
 #define MB(s) s * 1024 * 1024