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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkOpts_DEFINED | 8 #ifndef SkOpts_DEFINED |
9 #define SkOpts_DEFINED | 9 #define SkOpts_DEFINED |
10 | 10 |
11 #include "SkTypes.h" | 11 #include "SkTypes.h" |
12 | 12 |
13 namespace SkOpts { | 13 namespace SkOpts { |
14 // Call to replace pointers to portable functions with pointers to CPU-speci
fic functions. | 14 // Call to replace pointers to portable functions with pointers to CPU-speci
fic functions. |
15 // Thread-safe and idempotent. | 15 // Thread-safe and idempotent. |
16 // Called by SkGraphics::Init(), and automatically #if SK_ALLOW_STATIC_GLOBA
L_INITIALIZERS. | 16 // Called by SkGraphics::Init(), and automatically #if SK_ALLOW_STATIC_GLOBA
L_INITIALIZERS. |
17 void Init(); | 17 void Init(); |
18 | 18 |
19 // (Function pointers go here). | 19 // Declare function pointers here... |
| 20 |
| 21 // Returns a fast approximation of 1.0f/sqrtf(x). |
| 22 extern float (*rsqrt)(float); |
20 } | 23 } |
21 | 24 |
22 #endif//SkOpts_DEFINED | 25 #endif//SkOpts_DEFINED |
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