1 /*
2  * Copyright (C) 2019 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 "guest/hals/hwcomposer/common/screen_view.h"
18 
19 #include "common/libs/utils/size_utils.h"
20 
21 namespace cuttlefish {
22 
NextBuffer()23 int ScreenView::NextBuffer() {
24   int num_buffers = this->num_buffers();
25   last_buffer_ = num_buffers > 0 ? (last_buffer_ + 1) % num_buffers : -1;
26   return last_buffer_;
27 }
28 
buffer_size() const29 size_t ScreenView::buffer_size() const {
30   return line_length() * y_res() + 4 /* swiftshader padding */;
31 }
32 
line_length() const33 size_t ScreenView::line_length() const {
34   return cuttlefish::AlignToPowerOf2(x_res() * bytes_per_pixel(), 4);
35 }
36 
bytes_per_pixel() const37 int ScreenView::bytes_per_pixel() const { return 4; }
38 }  // namespace cuttlefish
39