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// Copyright (C) 2023 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use nativewindow::*;
/// The configuration of the buffers published by a [BufferPublisher] or
/// expected by a [BufferSubscriber].
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct StreamConfig {
/// Width in pixels of streaming buffers.
pub width: u32,
/// Height in pixels of streaming buffers.
pub height: u32,
/// Number of layers of streaming buffers.
pub layers: u32,
/// Format of streaming buffers.
pub format: AHardwareBuffer_Format::Type,
/// Usage of streaming buffers.
pub usage: AHardwareBuffer_UsageFlags,
/// Stride of streaming buffers.
pub stride: u32,
}
impl StreamConfig {
/// Tries to create a new HardwareBuffer from settings in a [StreamConfig].
pub fn create_hardware_buffer(&self) -> Option<HardwareBuffer> {
HardwareBuffer::new(self.width, self.height, self.layers, self.format, self.usage)
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_create_hardware_buffer() {
let config = StreamConfig {
width: 123,
height: 456,
layers: 1,
format: AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM,
usage: AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN
| AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN,
stride: 0,
};
let maybe_buffer = config.create_hardware_buffer();
assert!(maybe_buffer.is_some());
let buffer = maybe_buffer.unwrap();
assert_eq!(config.width, buffer.width());
assert_eq!(config.height, buffer.height());
assert_eq!(config.format, buffer.format());
assert_eq!(config.usage, buffer.usage());
}
}
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