add kGray_8_SkColorType

include/core/SkImageInfo.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageInfo_DEFINED
 #define SkImageInfo_DEFINED
 
@@ skipping 54 matching lines @@
  *  for 32bit pixels.
  */
 enum SkColorType {
     kUnknown_SkColorType,
     kAlpha_8_SkColorType,
     kRGB_565_SkColorType,
     kARGB_4444_SkColorType,
     kRGBA_8888_SkColorType,
     kBGRA_8888_SkColorType,
     kIndex_8_SkColorType,
+    kGray_8_SkColorType,
 
-    kLastEnum_SkColorType = kIndex_8_SkColorType,
+    kLastEnum_SkColorType = kGray_8_SkColorType,
 
 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
     kN32_SkColorType = kBGRA_8888_SkColorType,
 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
     kN32_SkColorType = kRGBA_8888_SkColorType,
 #else
     #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order"
 #endif
 };
 
 static int SkColorTypeBytesPerPixel(SkColorType ct) {
     static const uint8_t gSize[] = {
         0,  // Unknown
         1,  // Alpha_8
         2,  // RGB_565
         2,  // ARGB_4444
         4,  // RGBA_8888
         4,  // BGRA_8888
         1,  // kIndex_8
+        1,  // kGray_8
     };
     SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType + 1),
                       size_mismatch_with_SkColorType_enum);
 
     SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize));
     return gSize[ct];
 }
 
 static inline size_t SkColorTypeMinRowBytes(SkColorType ct, int width) {
     return width * SkColorTypeBytesPerPixel(ct);
@@ skipping 183 matching lines @@
         , fHeight(height)
         , fColorType(ct)
         , fAlphaType(at)
         , fProfileType(pt)
     {}
 
     SkColorProfileType  fProfileType;
 };
 
 #endif