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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/readable_event.h"
#include "core/hle/kernel/writable_event.h"
#include "core/hle/service/nvflinger/buffer_queue.h"
namespace Service::NVFlinger {
BufferQueue::BufferQueue(Kernel::KernelCore& kernel, u32 id, u64 layer_id)
: id(id), layer_id(layer_id) {
buffer_wait_event = Kernel::WritableEvent::CreateEventPair(kernel, "BufferQueue NativeHandle");
}
BufferQueue::~BufferQueue() = default;
void BufferQueue::SetPreallocatedBuffer(u32 slot, const IGBPBuffer& igbp_buffer) {
ASSERT(slot < buffer_slots);
LOG_WARNING(Service, "Adding graphics buffer {}", slot);
free_buffers.push_back(slot);
buffers[slot] = {
.slot = slot,
.status = Buffer::Status::Free,
.igbp_buffer = igbp_buffer,
.transform = {},
.crop_rect = {},
.swap_interval = 0,
.multi_fence = {},
};
buffer_wait_event.writable->Signal();
}
std::optional<std::pair<u32, Service::Nvidia::MultiFence*>> BufferQueue::DequeueBuffer(u32 width,
u32 height) {
if (free_buffers.empty()) {
return std::nullopt;
}
auto f_itr = free_buffers.begin();
auto slot = buffers.size();
while (f_itr != free_buffers.end()) {
const Buffer& buffer = buffers[*f_itr];
if (buffer.status == Buffer::Status::Free && buffer.igbp_buffer.width == width &&
buffer.igbp_buffer.height == height) {
slot = *f_itr;
free_buffers.erase(f_itr);
break;
}
++f_itr;
}
if (slot == buffers.size()) {
return std::nullopt;
}
buffers[slot].status = Buffer::Status::Dequeued;
return {{buffers[slot].slot, &buffers[slot].multi_fence}};
}
const IGBPBuffer& BufferQueue::RequestBuffer(u32 slot) const {
ASSERT(slot < buffers.size());
ASSERT(buffers[slot].status == Buffer::Status::Dequeued);
ASSERT(buffers[slot].slot == slot);
return buffers[slot].igbp_buffer;
}
void BufferQueue::QueueBuffer(u32 slot, BufferTransformFlags transform,
const Common::Rectangle<int>& crop_rect, u32 swap_interval,
Service::Nvidia::MultiFence& multi_fence) {
ASSERT(slot < buffers.size());
ASSERT(buffers[slot].status == Buffer::Status::Dequeued);
ASSERT(buffers[slot].slot == slot);
buffers[slot].status = Buffer::Status::Queued;
buffers[slot].transform = transform;
buffers[slot].crop_rect = crop_rect;
buffers[slot].swap_interval = swap_interval;
buffers[slot].multi_fence = multi_fence;
queue_sequence.push_back(slot);
}
void BufferQueue::CancelBuffer(u32 slot, const Service::Nvidia::MultiFence& multi_fence) {
ASSERT(slot < buffers.size());
ASSERT(buffers[slot].status != Buffer::Status::Free);
ASSERT(buffers[slot].slot == slot);
buffers[slot].status = Buffer::Status::Free;
buffers[slot].multi_fence = multi_fence;
buffers[slot].swap_interval = 0;
free_buffers.push_back(slot);
buffer_wait_event.writable->Signal();
}
std::optional<std::reference_wrapper<const BufferQueue::Buffer>> BufferQueue::AcquireBuffer() {
std::size_t buffer_slot = buffers.size();
// Iterate to find a queued buffer matching the requested slot.
while (buffer_slot == buffers.size() && !queue_sequence.empty()) {
const auto slot = static_cast<std::size_t>(queue_sequence.front());
ASSERT(slot < buffers.size());
if (buffers[slot].status == Buffer::Status::Queued) {
ASSERT(buffers[slot].slot == slot);
buffer_slot = slot;
}
queue_sequence.pop_front();
}
if (buffer_slot == buffers.size()) {
return std::nullopt;
}
buffers[buffer_slot].status = Buffer::Status::Acquired;
return {{buffers[buffer_slot]}};
}
void BufferQueue::ReleaseBuffer(u32 slot) {
ASSERT(slot < buffers.size());
ASSERT(buffers[slot].status == Buffer::Status::Acquired);
ASSERT(buffers[slot].slot == slot);
buffers[slot].status = Buffer::Status::Free;
free_buffers.push_back(slot);
buffer_wait_event.writable->Signal();
}
void BufferQueue::Disconnect() {
buffers.fill({});
queue_sequence.clear();
buffer_wait_event.writable->Signal();
}
u32 BufferQueue::Query(QueryType type) {
LOG_WARNING(Service, "(STUBBED) called type={}", type);
switch (type) {
case QueryType::NativeWindowFormat:
return static_cast<u32>(PixelFormat::RGBA8888);
}
UNIMPLEMENTED();
return 0;
}
std::shared_ptr<Kernel::WritableEvent> BufferQueue::GetWritableBufferWaitEvent() const {
return buffer_wait_event.writable;
}
std::shared_ptr<Kernel::ReadableEvent> BufferQueue::GetBufferWaitEvent() const {
return buffer_wait_event.readable;
}
} // namespace Service::NVFlinger
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