| Allan MacKinnon | 4359d52 | 2018-06-19 13:57:04 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can |
| 5 | * be found in the LICENSE file. |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | #pragma once |
| 10 | |
| 11 | // |
| 12 | // |
| 13 | // |
| 14 | |
| 15 | #include "types.h" |
| 16 | |
| 17 | // |
| 18 | // Add defensive high guard-bit flags to the opaque path and raster |
| 19 | // handles. This is tested once and stripped down to a handle. |
| 20 | // |
| 21 | // union skc_typed_handle |
| 22 | // { |
| 23 | // skc_uint u32; |
| 24 | // |
| 25 | // struct { |
| 26 | // skc_uint handle : 30; |
| 27 | // skc_uint is_path : 1; |
| 28 | // skc_uint is_raster : 1; |
| 29 | // }; |
| 30 | // struct { |
| 31 | // skc_uint na : 30; |
| 32 | // skc_uint type : 2; |
| 33 | // }; |
| 34 | // } |
| 35 | // |
| 36 | |
| 37 | typedef enum skc_typed_handle_type_e |
| 38 | { |
| 39 | SKC_TYPED_HANDLE_TYPE_IS_PATH = 0x40000000, |
| 40 | SKC_TYPED_HANDLE_TYPE_IS_RASTER = 0x80000000 |
| 41 | } skc_typed_handle_type_e; |
| Hal Canary | 1419534 | 2018-07-11 16:10:14 -0400 | [diff] [blame] | 42 | |
| Allan MacKinnon | 4359d52 | 2018-06-19 13:57:04 -0700 | [diff] [blame] | 43 | typedef skc_uint skc_typed_handle_t; |
| 44 | typedef skc_uint skc_handle_t; |
| 45 | |
| 46 | // |
| 47 | // |
| 48 | // |
| 49 | |
| 50 | #define SKC_TYPED_HANDLE_MASK_TYPE (SKC_TYPED_HANDLE_TYPE_IS_PATH | SKC_TYPED_HANDLE_TYPE_IS_RASTER) |
| 51 | |
| 52 | #define SKC_TYPED_HANDLE_TO_HANDLE(h) ((h) & ~SKC_TYPED_HANDLE_MASK_TYPE) |
| 53 | |
| 54 | #define SKC_TYPED_HANDLE_IS_TYPE(h,t) ((h) & (t)) |
| 55 | #define SKC_TYPED_HANDLE_IS_PATH(h) ((h) & SKC_TYPED_HANDLE_TYPE_IS_PATH) |
| 56 | #define SKC_TYPED_HANDLE_IS_RASTER(h) ((h) & SKC_TYPED_HANDLE_TYPE_IS_RASTER) |
| 57 | |
| 58 | // |
| 59 | // |
| 60 | // |