assert in setPixelRef that the pr matches the bitmap's config

src/core/SkBitmap.cpp

 
 /*
  * Copyright 2008 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.
  */
 
 
 #include "SkBitmap.h"
@@ skipping 384 matching lines @@
         info->fColorType = ct;
     }
     return true;
 }
 
 SkPixelRef* SkBitmap::setPixelRef(SkPixelRef* pr, size_t offset) {
     // do this first, we that we never have a non-zero offset with a null ref
     if (NULL == pr) {
         offset = 0;
     }
+#ifdef SK_DEBUG
+    else {
+        SkImageInfo info;
+        if (this->asImageInfo(&info)) {
+            const SkImageInfo& prInfo = pr->info();
+            SkASSERT(info.fWidth <= prInfo.fWidth);
+            SkASSERT(info.fHeight <= prInfo.fHeight);
+            SkASSERT(info.fColorType == prInfo.fColorType);
+            switch (prInfo.fAlphaType) {
+                case kIgnore_SkAlphaType:
+                    SkASSERT(fAlphaType == kIgnore_SkAlphaType);
+                    break;
+                case kOpaque_SkAlphaType:
+                case kPremul_SkAlphaType:

[hal.canary, 2014/01/02 22:36:01]

Under what circumstances will the alphatypes be !=?

+                    SkASSERT(info.fAlphaType == kOpaque_SkAlphaType ||
+                             info.fAlphaType == kPremul_SkAlphaType);
+                    break;
+                case kUnpremul_SkAlphaType:
+                    SkASSERT(info.fAlphaType == kOpaque_SkAlphaType ||
+                             info.fAlphaType == kUnpremul_SkAlphaType);
+                    break;
+            }
+        }
+    }
+#endif
 
     if (fPixelRef != pr || fPixelRefOffset != offset) {
         if (fPixelRef != pr) {
             this->freePixels();
             SkASSERT(NULL == fPixelRef);
 
             SkSafeRef(pr);
             fPixelRef = pr;
         }
         fPixelRefOffset = offset;
@@ skipping 1286 matching lines @@
         if (NULL != uri) {
             str->appendf(" uri:\"%s\"", uri);
         } else {
             str->appendf(" pixelref:%p", pr);
         }
     }
 
     str->append(")");
 }
 #endif