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 #include "IndexRangeCache.h"
18
19 // This is almost literally
20 // external/angle/src/libANGLE/IndexRangeCache.cpp
21
addRange(GLenum type,size_t offset,size_t count,bool primitiveRestartEnabled,int start,int end)22 void IndexRangeCache::addRange(GLenum type,
23 size_t offset,
24 size_t count,
25 bool primitiveRestartEnabled,
26 int start,
27 int end) {
28 IndexRange r;
29 r.start = start;
30 r.end = end;
31 mIndexRangeCache[IndexRangeKey(type, offset, count, primitiveRestartEnabled)] = r;
32 }
33
findRange(GLenum type,size_t offset,size_t count,bool primitiveRestartEnabled,int * start_out,int * end_out) const34 bool IndexRangeCache::findRange(GLenum type,
35 size_t offset,
36 size_t count,
37 bool primitiveRestartEnabled,
38 int* start_out,
39 int* end_out) const {
40 IndexRangeMap::const_iterator it =
41 mIndexRangeCache.find(
42 IndexRangeKey(type, offset, count, primitiveRestartEnabled));
43
44 if (it != mIndexRangeCache.end()) {
45 if (start_out) *start_out = it->second.start;
46 if (end_out) *end_out = it->second.end;
47 return true;
48 } else {
49 if (start_out) *start_out = 0;
50 if (end_out) *end_out = 0;
51 return false;
52 }
53 }
54
55
invalidateRange(size_t offset,size_t size)56 void IndexRangeCache::invalidateRange(size_t offset, size_t size) {
57 size_t invalidateStart = offset;
58 size_t invalidateEnd = offset + size;
59
60 IndexRangeMap::iterator it =
61 mIndexRangeCache.lower_bound(
62 IndexRangeKey(GL_UNSIGNED_BYTE,
63 offset,
64 size,
65 false));
66
67 while (it != mIndexRangeCache.end()) {
68 size_t rangeStart = it->first.offset;
69 size_t rangeEnd =
70 it->first.offset +
71 it->first.count * glSizeof(it->first.type);
72
73 if (invalidateEnd < rangeStart ||
74 invalidateStart > rangeEnd) {
75 ++it;
76 } else {
77 mIndexRangeCache.erase(it++);
78 }
79 }
80 }
81
clear()82 void IndexRangeCache::clear() {
83 mIndexRangeCache.clear();
84 }
85