Adding 3D lut color filter

src/core/SkBitmap.cpp

Index: src/core/SkBitmap.cpp
diff --git a/src/core/SkBitmap.cpp b/src/core/SkBitmap.cpp
index f0ad029bea9285b74f03bbb0700ad09d1255c797..1a1ced07b94268a0a5a6bdb39424261e4cca230c 100644
--- a/src/core/SkBitmap.cpp
+++ b/src/core/SkBitmap.cpp
@@ -498,6 +498,18 @@ void SkBitmap::setIsVolatile(bool isVolatile) {
     }
 }
 
+bool SkBitmap::is3DLut() const {
+    return (fFlags & kIs3DLut_Flag) != 0;
+}
+
+void SkBitmap::setIs3DLut(bool is3DLut) {
+    if (is3DLut && ((width() * width()) == height())) {
+        fFlags |= kIs3DLut_Flag;
+    } else {
+        fFlags &= ~kIs3DLut_Flag;
+    }
+}
+
 void* SkBitmap::getAddr(int x, int y) const {
     SkASSERT((unsigned)x < (unsigned)this->width());
     SkASSERT((unsigned)y < (unsigned)this->height());
@@ -1318,6 +1330,7 @@ void SkBitmap::validate() const {
 #ifdef SK_BUILD_FOR_ANDROID
     allFlags |= kHasHardwareMipMap_Flag;
 #endif
+    allFlags |= kIs3DLut_Flag;
     SkASSERT((~allFlags & fFlags) == 0);
     SkASSERT(fPixelLockCount >= 0);