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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CC_RESOURCES_RESOURCE_UTIL_H_ |
| 6 #define CC_RESOURCES_RESOURCE_UTIL_H_ |
| 7 |
| 8 #include "cc/base/cc_export.h" |
| 9 #include "cc/resources/resource_format.h" |
| 10 #include "ui/gfx/geometry/size.h" |
| 11 |
| 12 namespace cc { |
| 13 |
| 14 class CC_EXPORT ResourceUtil { |
| 15 public: |
| 16 // Dies with a CRASH() if the size can not be represented as a positive number |
| 17 // of bytes. |
| 18 static size_t CheckedSizeInBytes(const gfx::Size& size, |
| 19 ResourceFormat format); |
| 20 // Returns the width in bytes but may overflow or return 0. Only do this for |
| 21 // computing widths for sizes that have already been checked. |
| 22 static size_t UncheckedWidthInBytes(size_t width, ResourceFormat format); |
| 23 static size_t UncheckedWidthInBytesAligned(size_t width, |
| 24 ResourceFormat format); |
| 25 // Returns the size in bytes but may overflow or return 0. Only do this for |
| 26 // sizes that have already been checked. |
| 27 static size_t UncheckedSizeInBytes(const gfx::Size& size, |
| 28 ResourceFormat format); |
| 29 static size_t UncheckedSizeInBytesAligned(const gfx::Size& size, |
| 30 ResourceFormat format); |
| 31 // Return true if the call to size in bytes would return a value that fits in |
| 32 // a size_t. |
| 33 static bool VerifySizeInBytes(const gfx::Size& size, ResourceFormat format); |
| 34 |
| 35 private: |
| 36 DISALLOW_COPY_AND_ASSIGN(ResourceUtil); |
| 37 }; |
| 38 |
| 39 } // namespace cc |
| 40 |
| 41 #endif // CC_RESOURCES_RESOURCE_UTIL_H_ |
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