commit 42e1e0d482d774cf18a55773e434f02edb9e4462
author Romain Guy <romainguy@google.com> Mon Jul 30 14:47:51 2012 -0700
committer Romain Guy <romainguy@google.com> Tue Jul 31 18:55:16 2012 -0700
tree 33ac1bca20382f2e8ccbf176c89b3476f2ae5c9b
parent 8ab8fbbf46d8779f53301e7f706f97608eed7117

Improve gradients

Avoid using textures for common gradients (two stops from 0.0 to 1.0)

Change-Id: Iff55d21b126c8cfc4cfb701669f2339c8f6b131a

libs/hwui/Program.h

diff --git a/libs/hwui/Program.h b/libs/hwui/Program.h
index 491767f..1818f82 100644
--- a/libs/hwui/Program.h
+++ b/libs/hwui/Program.h
@@ -79,6 +79,8 @@
 
 #define PROGRAM_HAS_GAMMA_CORRECTION 40
 
+#define PROGRAM_IS_SIMPLE_GRADIENT 41
+
 ///////////////////////////////////////////////////////////////////////////////
 // Types
 ///////////////////////////////////////////////////////////////////////////////
@@ -96,14 +98,14 @@
  */
 struct ProgramDescription {
     enum ColorModifier {
-        kColorNone,
+        kColorNone = 0,
         kColorMatrix,
         kColorLighting,
         kColorBlend
     };
 
     enum Gradient {
-        kGradientLinear,
+        kGradientLinear = 0,
         kGradientCircular,
         kGradientSweep
     };
@@ -129,6 +131,7 @@
 
     bool hasGradient;
     Gradient gradientType;
+    bool isSimpleGradient;
 
     SkXfermode::Mode shadersMode;
 
@@ -170,6 +173,7 @@
 
         hasGradient = false;
         gradientType = kGradientLinear;
+        isSimpleGradient = false;
 
         shadersMode = SkXfermode::kClear_Mode;
 
@@ -255,6 +259,7 @@
         if (hasExternalTexture) key |= programid(0x1) << PROGRAM_HAS_EXTERNAL_TEXTURE_SHIFT;
         if (hasTextureTransform) key |= programid(0x1) << PROGRAM_HAS_TEXTURE_TRANSFORM_SHIFT;
         if (hasGammaCorrection) key |= programid(0x1) << PROGRAM_HAS_GAMMA_CORRECTION;
+        if (isSimpleGradient) key |= programid(0x1) << PROGRAM_IS_SIMPLE_GRADIENT;
         return key;
     }