Set GL_PACK_ALIGNMENT before calling glReadPixels

include/gpu/GrTypes.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTypes_DEFINED
 #define GrTypes_DEFINED
 
@@ skipping 345 matching lines @@
             return 4;
         case kRGBA_half_GrPixelConfig:
             return 8;
         case kRGBA_float_GrPixelConfig:
             return 16;
         default:
             return 0;
     }
 }
 
-static inline size_t GrUnpackAlignment(GrPixelConfig config) {
-    SkASSERT(!GrPixelConfigIsCompressed(config));
-    switch (config) {
-        case kAlpha_8_GrPixelConfig:
-            return 1;
-        case kRGB_565_GrPixelConfig:
-        case kRGBA_4444_GrPixelConfig:
-        case kAlpha_half_GrPixelConfig:
-        case kRGBA_half_GrPixelConfig:
-            return 2;
-        case kRGBA_8888_GrPixelConfig:
-        case kBGRA_8888_GrPixelConfig:
-        case kSRGBA_8888_GrPixelConfig:
-        case kRGBA_float_GrPixelConfig:
-            return 4;
-        default:
-            return 0;
-    }
-}
-
 static inline bool GrPixelConfigIsOpaque(GrPixelConfig config) {
     switch (config) {
         case kETC1_GrPixelConfig:
         case kRGB_565_GrPixelConfig:
             return true;
         default:
             return false;
     }
 }
 
@@ skipping 242 matching lines @@
             return 4 * width * height;
     }
 }
 
 /**
  * This value translates to reseting all the context state for any backend.
  */
 static const uint32_t kAll_GrBackendState = 0xffffffff;
 
 #endif