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// Copyright 2023 The Pigweed Authors
//
// 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
//
// https://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.
#include "pw_framebuffer_pool/framebuffer_pool.h"
using pw::framebuffer::Framebuffer;
namespace pw::framebuffer_pool {
FramebufferPool::FramebufferPool(const Config& config)
: buffer_addresses_(config.fb_addr),
buffer_dimensions_(config.dimensions),
row_bytes_(config.row_bytes),
pixel_format_(config.pixel_format),
next_fb_idx_(0) {
framebuffer_semaphore_.release(config.fb_addr.size());
}
FramebufferPool::~FramebufferPool() = default;
Framebuffer FramebufferPool::GetFramebuffer() {
framebuffer_semaphore_.acquire();
size_t idx = next_fb_idx_++;
if (next_fb_idx_ == buffer_addresses_.size())
next_fb_idx_ = 0;
return Framebuffer(
buffer_addresses_[idx], pixel_format_, buffer_dimensions_, row_bytes_);
}
Status FramebufferPool::ReleaseFramebuffer(Framebuffer) {
framebuffer_semaphore_.release();
return OkStatus();
}
} // namespace pw::framebuffer_pool