1 /*
2 * Copyright 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 #pragma once
18
19 #include <android/hardware/graphics/mapper/2.0/IMapper.h>
20
21 namespace android {
22 namespace hardware {
23 namespace graphics {
24 namespace mapper {
25 namespace V2_0 {
26 namespace passthrough {
27
28 using android::hardware::graphics::common::V1_0::PixelFormat;
29
30 /**
31 * BufferDescriptor is created by IMapper and consumed by IAllocator. It is
32 * versioned so that IMapper and IAllocator can be updated independently.
33 */
34 constexpr uint32_t grallocBufferDescriptorSize = 7;
35 constexpr uint32_t grallocBufferDescriptorMagicVersion = ((0x9487 << 16) | 0);
36
grallocEncodeBufferDescriptor(const IMapper::BufferDescriptorInfo & descriptorInfo)37 inline BufferDescriptor grallocEncodeBufferDescriptor(
38 const IMapper::BufferDescriptorInfo& descriptorInfo) {
39 BufferDescriptor descriptor;
40 descriptor.resize(grallocBufferDescriptorSize);
41 descriptor[0] = grallocBufferDescriptorMagicVersion;
42 descriptor[1] = descriptorInfo.width;
43 descriptor[2] = descriptorInfo.height;
44 descriptor[3] = descriptorInfo.layerCount;
45 descriptor[4] = static_cast<uint32_t>(descriptorInfo.format);
46 descriptor[5] = static_cast<uint32_t>(descriptorInfo.usage);
47 descriptor[6] = static_cast<uint32_t>(descriptorInfo.usage >> 32);
48
49 return descriptor;
50 }
51
grallocDecodeBufferDescriptor(const BufferDescriptor & descriptor,IMapper::BufferDescriptorInfo * outDescriptorInfo)52 inline bool grallocDecodeBufferDescriptor(const BufferDescriptor& descriptor,
53 IMapper::BufferDescriptorInfo* outDescriptorInfo) {
54 if (descriptor.size() != grallocBufferDescriptorSize ||
55 descriptor[0] != grallocBufferDescriptorMagicVersion) {
56 return false;
57 }
58
59 *outDescriptorInfo = IMapper::BufferDescriptorInfo{
60 descriptor[1],
61 descriptor[2],
62 descriptor[3],
63 static_cast<PixelFormat>(descriptor[4]),
64 (static_cast<uint64_t>(descriptor[6]) << 32) | descriptor[5],
65 };
66
67 return true;
68 }
69
70 } // namespace passthrough
71 } // namespace V2_0
72 } // namespace mapper
73 } // namespace graphics
74 } // namespace hardware
75 } // namespace android
76