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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CC_TILES_MIPMAP_UTIL_H_ | 5 #ifndef CC_TILES_MIPMAP_UTIL_H_ |
| 6 #define CC_TILES_MIPMAP_UTIL_H_ | 6 #define CC_TILES_MIPMAP_UTIL_H_ |
| 7 | 7 |
| 8 #include "cc/base/cc_export.h" | 8 #include "cc/cc_export.h" |
| 9 #include "third_party/skia/include/core/SkSize.h" | 9 #include "third_party/skia/include/core/SkSize.h" |
| 10 #include "ui/gfx/skia_util.h" | 10 #include "ui/gfx/skia_util.h" |
| 11 | 11 |
| 12 namespace cc { | 12 namespace cc { |
| 13 | 13 |
| 14 class CC_EXPORT MipMapUtil { | 14 class CC_EXPORT MipMapUtil { |
| 15 public: | 15 public: |
| 16 // Determine the smallest mip level that is larger than |target_size|. Each | 16 // Determine the smallest mip level that is larger than |target_size|. Each |
| 17 // mip level corresponds to a power of two scale of the image - for instance, | 17 // mip level corresponds to a power of two scale of the image - for instance, |
| 18 // level 0 is original size, level 1 is 2x smaller, level 2 is 4x smaller, | 18 // level 0 is original size, level 1 is 2x smaller, level 2 is 4x smaller, |
| (...skipping 16 matching lines...) Expand all Loading... |
| 35 // Determines the scale factor for the smallest mip level that is larger than | 35 // Determines the scale factor for the smallest mip level that is larger than |
| 36 // |target_size|. This function does not do error checking and must be called | 36 // |target_size|. This function does not do error checking and must be called |
| 37 // with a valid src_size (width/height > 0) and mip_level (>= 0). | 37 // with a valid src_size (width/height > 0) and mip_level (>= 0). |
| 38 static SkSize GetScaleAdjustmentForSize(const gfx::Size& src_size, | 38 static SkSize GetScaleAdjustmentForSize(const gfx::Size& src_size, |
| 39 const gfx::Size& target_size); | 39 const gfx::Size& target_size); |
| 40 }; | 40 }; |
| 41 | 41 |
| 42 } // namespace cc | 42 } // namespace cc |
| 43 | 43 |
| 44 #endif // CC_TILES_MIPMAP_UTIL_H_ | 44 #endif // CC_TILES_MIPMAP_UTIL_H_ |
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