move SkImageInfo into its own header

include/core/SkBitmap.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkBitmap_DEFINED
 #define SkBitmap_DEFINED
 
 #include "Sk64.h"
-#include "SkAlpha.h"
 #include "SkColor.h"
 #include "SkColorTable.h"
+#include "SkImageInfo.h"
 #include "SkPoint.h"
 #include "SkRefCnt.h"
 
-struct SkImageInfo;
 struct SkIRect;
 struct SkRect;
 class SkPaint;
 class SkPixelRef;
 class SkRegion;
 class SkString;
 
 class GrTexture;
 
 /** \class SkBitmap
@@ skipping 787 matching lines @@
 
 // returns the address of the byte that contains the x coordinate
 inline uint8_t* SkBitmap::getAddr1(int x, int y) const {
     SkASSERT(fPixels);
     SkASSERT(fConfig == kA1_Config);
     SkASSERT((unsigned)x < fWidth && (unsigned)y < fHeight);
     return (uint8_t*)fPixels + y * fRowBytes + (x >> 3);
 }
 
 #endif