Adding 3D lut color filter

src/gpu/SkGr.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGr.h"
 #include "SkColorFilter.h"
 #include "SkConfig8888.h"
@@ skipping 89 matching lines @@
     memcpy(key.fData8 + 14, &height,    2);
     static const size_t kKeyDataSize = 16;
     memset(key.fData8 + kKeyDataSize, 0, sizeof(key) - kKeyDataSize);
     GR_STATIC_ASSERT(sizeof(key) >= kKeyDataSize);
     static const GrCacheID::Domain gBitmapTextureDomain = GrCacheID::GenerateDomain();
     id->reset(gBitmapTextureDomain, key);
 }
 
 static void generate_bitmap_texture_desc(const SkBitmap& bitmap, GrTextureDesc* desc) {
     desc->fFlags = kNone_GrTextureFlags;
-    desc->fWidth = bitmap.width();
-    desc->fHeight = bitmap.height();
+    if (bitmap.is3DLut()) {
+        desc->fWidth = desc->fHeight = desc->fDepth = bitmap.width();
+    } else {
+        desc->fWidth = bitmap.width();
+        desc->fHeight = bitmap.height();
+        desc->fDepth = 0;
+    }
     desc->fConfig = SkImageInfo2GrPixelConfig(bitmap.info());
     desc->fSampleCnt = 0;
 }
 
 namespace {
 
 // When the SkPixelRef genID changes, invalidate a corresponding GrResource described by key.
 class GrResourceInvalidator : public SkPixelRef::GenIDChangeListener {
 public:
     explicit GrResourceInvalidator(GrResourceKey key) : fKey(key) {}
@@ skipping 454 matching lines @@
         if (shader->asNewEffect(context, skPaint, NULL, &paintColor, &effect) && effect) {
             grPaint->addColorEffect(effect)->unref();
             constantColor = false;
         }
     }
 
     // The grcolor is automatically set when calling asneweffect.
     // If the shader can be seen as an effect it returns true and adds its effect to the grpaint.
     SkPaint2GrPaintNoShader(context, skPaint, paintColor, constantColor, grPaint);
 }