Lingfeng Yang | 8e2b6e0 | 2016-10-14 11:20:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | // This is almost literally |
| 18 | // external/angle/src/common/mathutil.h: IndexRange + |
| 19 | // external/angle/src/libANGLE/IndexRangeCache.h: IndexRangeCache, |
| 20 | // with adaptations to work with goldfish opengl driver. |
| 21 | // Currently, primitive restart is not supported, so there |
| 22 | // is a very minimal incorporation of that. |
| 23 | |
| 24 | #ifndef _GL_INDEX_RANGE_CACHE_H_ |
| 25 | #define _GL_INDEX_RANGE_CACHE_H_ |
| 26 | |
| 27 | #include <GLES/gl.h> |
| 28 | #include <GLES/glext.h> |
| 29 | #include <GLES2/gl2.h> |
| 30 | #include <GLES2/gl2ext.h> |
| 31 | |
| 32 | #include "glUtils.h" |
| 33 | |
| 34 | #include <map> |
| 35 | |
| 36 | struct IndexRange { |
Lingfeng Yang | 8e2b6e0 | 2016-10-14 11:20:45 -0700 | [diff] [blame] | 37 | // Inclusive range of indices that are not primitive restart |
| 38 | int start; |
| 39 | int end; |
| 40 | |
| 41 | // Number of non-primitive restart indices |
| 42 | size_t vertexIndexCount; // TODO; not being accounted yet (GLES3 feature) |
| 43 | }; |
| 44 | |
| 45 | class IndexRangeCache { |
| 46 | public: |
| 47 | void addRange(GLenum type, |
| 48 | size_t offset, |
| 49 | size_t count, |
| 50 | bool primitiveRestartEnabled, |
| 51 | int start, |
| 52 | int end); |
| 53 | bool findRange(GLenum type, |
| 54 | size_t offset, |
| 55 | size_t count, |
| 56 | bool primitiveRestartEnabled, |
| 57 | int* start_out, |
| 58 | int* end_out) const; |
| 59 | void invalidateRange(size_t offset, size_t size); |
| 60 | void clear(); |
| 61 | private: |
| 62 | struct IndexRangeKey { |
| 63 | IndexRangeKey() : |
| 64 | type(GL_NONE), |
| 65 | offset(0), |
| 66 | count(0), |
| 67 | primitiveRestartEnabled(false) { } |
| 68 | IndexRangeKey(GLenum _type, |
| 69 | size_t _offset, |
| 70 | size_t _count, |
| 71 | bool _primitiveRestart) : |
| 72 | type(_type), |
| 73 | offset(_offset), |
| 74 | count(_count), |
| 75 | primitiveRestartEnabled(_primitiveRestart) { } |
| 76 | |
| 77 | bool operator<(const IndexRangeKey& rhs) const { |
Lingfeng Yang | 8e2b6e0 | 2016-10-14 11:20:45 -0700 | [diff] [blame] | 78 | size_t end = offset + count * glSizeof(type); |
Yahan Zhou | 0f3971d | 2018-11-28 12:00:13 -0800 | [diff] [blame] | 79 | size_t end_other = rhs.offset + rhs.count * glSizeof(rhs.type); |
Lingfeng Yang | 8e2b6e0 | 2016-10-14 11:20:45 -0700 | [diff] [blame] | 80 | |
Yahan Zhou | 0f3971d | 2018-11-28 12:00:13 -0800 | [diff] [blame] | 81 | if (offset != rhs.offset) return offset < rhs.offset; |
| 82 | if (end != end_other) return end < end_other; |
Lingfeng Yang | 8e2b6e0 | 2016-10-14 11:20:45 -0700 | [diff] [blame] | 83 | if (type != rhs.type) return type < rhs.type; |
Lingfeng Yang | 8e2b6e0 | 2016-10-14 11:20:45 -0700 | [diff] [blame] | 84 | if (primitiveRestartEnabled != rhs.primitiveRestartEnabled) |
| 85 | return primitiveRestartEnabled; |
| 86 | return false; |
| 87 | } |
| 88 | |
| 89 | GLenum type; |
| 90 | size_t offset; |
| 91 | size_t count; |
| 92 | bool primitiveRestartEnabled; |
| 93 | }; |
| 94 | |
| 95 | typedef std::map<IndexRangeKey, IndexRange> IndexRangeMap; |
| 96 | IndexRangeMap mIndexRangeCache; |
| 97 | }; |
| 98 | |
| 99 | #endif |