SkData can allocate room for its contents in the same block

src/utils/SkTextureCompressor.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTextureCompressor.h"
 #include "SkTextureCompressor_ASTC.h"
 #include "SkTextureCompressor_LATC.h"
@@ skipping 155 matching lines @@
         }
     }
 
     if (proc) {
         return proc(dst, src, width, height, rowBytes);
     }
 
     return false;
 }
 
-SkData *CompressBitmapToFormat(const SkBitmap &bitmap, Format format) {
+SkData* CompressBitmapToFormat(const SkBitmap &bitmap, Format format) {
     SkAutoLockPixels alp(bitmap);
 
     int compressedDataSize = GetCompressedDataSize(format, bitmap.width(), bitmap.height());
     if (compressedDataSize < 0) {
         return NULL;
     }
 
     const uint8_t* src = reinterpret_cast<const uint8_t*>(bitmap.getPixels());
-    uint8_t* dst = reinterpret_cast<uint8_t*>(sk_malloc_throw(compressedDataSize));
+    SkData* dst = SkData::NewUninitialized(compressedDataSize);
 
-    if (CompressBufferToFormat(dst, src, bitmap.colorType(), bitmap.width(), bitmap.height(),
-                               bitmap.rowBytes(), format)) {
-        return SkData::NewFromMalloc(dst, compressedDataSize);
+    if (!CompressBufferToFormat((uint8_t*)dst->writable_data(), src, bitmap.colorType(),
+                                bitmap.width(), bitmap.height(), bitmap.rowBytes(), format)) {
+        dst->unref();
+        dst = NULL;
     }
-
-    sk_free(dst);
-    return NULL;
+    return dst;
 }
 
 SkBlitter* CreateBlitterForFormat(int width, int height, void* compressedBuffer,
                                   SkTBlitterAllocator *allocator, Format format) {
     switch(format) {
         case kLATC_Format:
             return CreateLATCBlitter(width, height, compressedBuffer, allocator);
 
         case kR11_EAC_Format:
             return CreateR11EACBlitter(width, height, compressedBuffer, allocator);
@@ skipping 50 matching lines @@
 
         default:
             // Do nothing...
             break;
     }
 
     return false;
 }
 
 }  // namespace SkTextureCompressor