1 /*-------------------------------------------------------------------------
2 * Vulkan CTS Framework
3 * --------------------
4 *
5 * Copyright (c) 2015 Google Inc.
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 *//*!
20 * \file
21 * \brief Vulkan api version.
22 *//*--------------------------------------------------------------------*/
23
24 #include "vkApiVersion.hpp"
25 #include <vector>
26 #include <set>
27 #include <algorithm>
28
29 namespace vk
30 {
31
unpackVersion(deUint32 version)32 ApiVersion unpackVersion (deUint32 version)
33 {
34 return ApiVersion(VK_API_VERSION_VARIANT(version),
35 VK_API_VERSION_MAJOR(version),
36 VK_API_VERSION_MINOR(version),
37 VK_API_VERSION_PATCH(version));
38 }
39
pack(const ApiVersion & version)40 deUint32 pack (const ApiVersion& version)
41 {
42 DE_ASSERT((version.variantNum & ~0x7) == 0);
43 DE_ASSERT((version.majorNum & ~0x7F) == 0);
44 DE_ASSERT((version.minorNum & ~0x3FF) == 0);
45 DE_ASSERT((version.patchNum & ~0xFFF) == 0);
46
47 return (version.variantNum << 29) | (version.majorNum << 22) | (version.minorNum << 12) | version.patchNum;
48 }
49
apiVersionClearPatch(deUint32 version)50 deUint32 apiVersionClearPatch(deUint32 version)
51 {
52 return version & ~0xFFF;
53 }
54
55 // Direct acyclic graph of Vulkan API versions and its predecessors.
56 // At the moment it's linear ( 0.1.0.0 < 0.1.1.0 < 0.1.2.0 < 1.1.0.0 ).
57 // But with the introduction of Vulkan 1.3 it won't be, because Vulkan 1.2 will have 2 successors orthogonal to each other.
58 // Moreover - when in the future new Vulkan SC 1.1 version will be created - it's possible that
59 // it will have 2 predecessors : Vulkan SC 1.0 and Vulkan 1.3 ( or later version - it's just example )
60 // When it happens : two new predecessors will look like this:
61 // { VK_MAKE_API_VERSION(1, 1, 1, 0), VK_MAKE_API_VERSION(1, 1, 0, 0) },
62 // { VK_MAKE_API_VERSION(1, 1, 1, 0), VK_MAKE_API_VERSION(0, 1, 3, 0) },
63
64 const static std::vector<std::pair<deUint32,deUint32>> apiVersionPredecessors =
65 {
66 { VK_MAKE_API_VERSION(0, 1, 0, 0), 0 },
67 { VK_MAKE_API_VERSION(0, 1, 1, 0), VK_MAKE_API_VERSION(0, 1, 0, 0) },
68 { VK_MAKE_API_VERSION(0, 1, 2, 0), VK_MAKE_API_VERSION(0, 1, 1, 0) },
69 { VK_MAKE_API_VERSION(1, 1, 0, 0), VK_MAKE_API_VERSION(0, 1, 2, 0) },
70 { VK_MAKE_API_VERSION(0, 1, 3, 0), VK_MAKE_API_VERSION(0, 1, 2, 0) },
71 };
72
isApiVersionEqual(deUint32 lhs,deUint32 rhs)73 bool isApiVersionEqual(deUint32 lhs, deUint32 rhs)
74 {
75 deUint32 lhsp = apiVersionClearPatch(lhs);
76 deUint32 rhsp = apiVersionClearPatch(rhs);
77 return lhsp == rhsp;
78 }
79
isApiVersionPredecessor(deUint32 version,deUint32 predVersion)80 bool isApiVersionPredecessor(deUint32 version, deUint32 predVersion)
81 {
82 std::vector<deUint32> versions;
83 versions.push_back(apiVersionClearPatch(version));
84
85 deUint32 p = apiVersionClearPatch(predVersion);
86
87 while (!versions.empty())
88 {
89 deUint32 v = versions.back();
90 versions.pop_back();
91
92 for (auto it = begin(apiVersionPredecessors); it != end(apiVersionPredecessors); ++it)
93 {
94 if (it->first != v)
95 continue;
96 if (it->second == p)
97 return true;
98 versions.push_back(it->second);
99 }
100 }
101 return false;
102 }
103
isApiVersionSupported(deUint32 yourVersion,deUint32 versionInQuestion)104 bool isApiVersionSupported(deUint32 yourVersion, deUint32 versionInQuestion)
105 {
106 if (isApiVersionEqual(yourVersion, versionInQuestion))
107 return true;
108 return isApiVersionPredecessor(yourVersion, versionInQuestion);
109 }
110
minVulkanAPIVersion(deUint32 lhs,deUint32 rhs)111 deUint32 minVulkanAPIVersion(deUint32 lhs, deUint32 rhs)
112 {
113 deUint32 lhsp = apiVersionClearPatch(lhs);
114 deUint32 rhsp = apiVersionClearPatch(rhs);
115 if (lhsp == rhsp)
116 return de::min(lhs, rhs);
117 if (isApiVersionPredecessor(rhs, lhs))
118 return lhs;
119 if (isApiVersionPredecessor(lhs, rhs))
120 return rhs;
121 // both versions are located in different DAG paths - we will return common predecessor
122 static std::vector<deUint32> commonPredecessors;
123 if (commonPredecessors.empty())
124 {
125 std::set<deUint32> pred;
126 for (auto it = begin(apiVersionPredecessors); it != end(apiVersionPredecessors); ++it)
127 {
128 if (pred.find(it->second) != end(pred))
129 commonPredecessors.push_back(it->second);
130 pred.insert(it->second);
131 }
132 std::sort(begin(commonPredecessors), end(commonPredecessors), [](deUint32 xlhs, deUint32 xrhs) { return isApiVersionPredecessor(xrhs, xlhs); });
133 }
134 for (auto it = begin(commonPredecessors); it != end(commonPredecessors); ++it)
135 if (isApiVersionPredecessor(rhs, *it) && isApiVersionPredecessor(lhs, *it))
136 return *it;
137 return 0;
138 }
139
140 } // vk
141