Tweak text gamma correction

Change-Id: Icd3326e6a054d6020c3ed61c8459394bc87401dd

Author: Romain Guy

libs/hwui/GammaFontRenderer.cpp

@@ -42,13 +42,13 @@ static int luminance(const SkPaint* paint) {
 GammaFontRenderer* GammaFontRenderer::createRenderer() {
     // Choose the best renderer
     char property[PROPERTY_VALUE_MAX];
-    if (property_get(PROPERTY_TEXT_GAMMA_SHADER, property, DEFAULT_TEXT_GAMMA_SHADER) > 0) {
-        if (!strcasecmp(property, "shader")) {
+    if (property_get(PROPERTY_TEXT_GAMMA_METHOD, property, DEFAULT_TEXT_GAMMA_METHOD) > 0) {
+        if (!strcasecmp(property, "lookup")) {
+            return new LookupGammaFontRenderer();
+        } else if (!strcasecmp(property, "shader")) {
             return new ShaderGammaFontRenderer(false);
         } else if (!strcasecmp(property, "shader3")) {
             return new ShaderGammaFontRenderer(true);
-        } else if (!strcasecmp(property, "lookup")) {
-            return new LookupGammaFontRenderer();
         }
     }
 

libs/hwui/Properties.h

@@ -88,7 +88,8 @@ enum DebugLevel {
 //
 // See PROPERTY_TEXT_GAMMA, PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD and
 // PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD for more control.
-#define PROPERTY_TEXT_GAMMA_SHADER "hwui.text_gamma_correction"
+#define PROPERTY_TEXT_GAMMA_METHOD "hwui.text_gamma_correction"
+#define DEFAULT_TEXT_GAMMA_METHOD "lookup"
 
 // Gamma (>= 1.0, <= 10.0)
 #define PROPERTY_TEXT_GAMMA "hwui.text_gamma"
@@ -111,8 +112,6 @@ enum DebugLevel {
 
 #define DEFAULT_TEXTURE_CACHE_FLUSH_RATE 0.6f
 
-#define DEFAULT_TEXT_GAMMA_SHADER "false"
-
 #define DEFAULT_TEXT_GAMMA 1.4f
 #define DEFAULT_TEXT_BLACK_GAMMA_THRESHOLD 64
 #define DEFAULT_TEXT_WHITE_GAMMA_THRESHOLD 192