SkBitmap now really stores SkImageInfo -- config is just a ruse

src/image/SkImagePriv.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImagePriv.h"
 #include "SkCanvas.h"
 #include "SkPicture.h"
@@ skipping 19 matching lines @@
             // break for unsupported colortypes
             break;
     }
     return SkBitmap::kNo_Config;
 }
 
 SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo& info) {
     return SkColorTypeToBitmapConfig(info.fColorType);
 }
 
-bool SkBitmapConfigToColorType(SkBitmap::Config config, SkColorType* ctOut) {
-    SkColorType ct;
-    switch (config) {
-        case SkBitmap::kA8_Config:
-            ct = kAlpha_8_SkColorType;
-            break;
-        case SkBitmap::kIndex8_Config:
-            ct = kIndex_8_SkColorType;
-            break;
-        case SkBitmap::kRGB_565_Config:
-            ct = kRGB_565_SkColorType;
-            break;
-        case SkBitmap::kARGB_4444_Config:
-            ct = kARGB_4444_SkColorType;
-            break;
-        case SkBitmap::kARGB_8888_Config:
-            ct = kPMColor_SkColorType;
-            break;
-        case SkBitmap::kNo_Config:
-        default:
-            return false;
-    }
-    if (ctOut) {
-        *ctOut = ct;
-    }
-    return true;
+SkColorType SkBitmapConfigToColorType(SkBitmap::Config config) {
+    static const SkColorType gCT[] = {
+        kUnknown_SkColorType,   // kNo_Config
+        kAlpha_8_SkColorType,   // kA8_Config
+        kIndex_8_SkColorType,   // kIndex8_Config
+        kRGB_565_SkColorType,   // kRGB_565_Config
+        kARGB_4444_SkColorType, // kARGB_4444_Config
+        kPMColor_SkColorType,   // kARGB_8888_Config
+    };
+    SkASSERT((unsigned)config < SK_ARRAY_COUNT(gCT));
+    return gCT[config];
 }
 
-
 SkImage* SkNewImageFromBitmap(const SkBitmap& bm, bool canSharePixelRef) {
     SkImageInfo info;
     if (!bm.asImageInfo(&info)) {
         return NULL;
     }
 
     SkImage* image = NULL;
     if (canSharePixelRef || bm.isImmutable()) {
         image = SkNewImageFromPixelRef(info, bm.pixelRef(), bm.rowBytes());
     } else {
@@ skipping 55 matching lines @@
         canvas->save();
     }
     canvas->concat(matrix);
     if (!paint || !needs_layer(*paint)) {
         canvas->clipRect(tmpSrc);
     }
 
     canvas->drawPicture(*picture);
     canvas->restoreToCount(saveCount);
 }