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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) {
LOG_WARNING(Service, "Adding graphics buffer {}", slot);
free_buffers.push_back(slot);
queue.push_back({
.slot = slot,
.status = Buffer::Status::Free,
.igbp_buffer = igbp_buffer,
});
buffer_wait_event.writable->Signal();
}
std::optional<std::pair<u32, Service::Nvidia::MultiFence*>> BufferQueue::DequeueBuffer(u32 width,
u32 height) {
if (free_buffers.empty()) {
return {};
}
auto f_itr = free_buffers.begin();
auto itr = queue.end();
while (f_itr != free_buffers.end()) {
auto slot = *f_itr;
itr = std::find_if(queue.begin(), queue.end(), [&](const Buffer& buffer) {
// Only consider free buffers. Buffers become free once again after they've been
// Acquired and Released by the compositor, see the NVFlinger::Compose method.
if (buffer.status != Buffer::Status::Free) {
return false;
}
if (buffer.slot != slot) {
return false;
}
// Make sure that the parameters match.
return buffer.igbp_buffer.width == width && buffer.igbp_buffer.height == height;
});
if (itr != queue.end()) {
free_buffers.erase(f_itr);
break;
}
++f_itr;
}
if (itr == queue.end()) {
return {};
}
itr->status = Buffer::Status::Dequeued;
return {{itr->slot, &itr->multi_fence}};
}
const IGBPBuffer& BufferQueue::RequestBuffer(u32 slot) const {
auto itr = std::find_if(queue.begin(), queue.end(),
[&](const Buffer& buffer) { return buffer.slot == slot; });
ASSERT(itr != queue.end());
ASSERT(itr->status == Buffer::Status::Dequeued);
return itr->igbp_buffer;
}
void BufferQueue::QueueBuffer(u32 slot, BufferTransformFlags transform,
const Common::Rectangle<int>& crop_rect, u32 swap_interval,
Service::Nvidia::MultiFence& multi_fence) {
auto itr = std::find_if(queue.begin(), queue.end(),
[&](const Buffer& buffer) { return buffer.slot == slot; });
ASSERT(itr != queue.end());
ASSERT(itr->status == Buffer::Status::Dequeued);
itr->status = Buffer::Status::Queued;
itr->transform = transform;
itr->crop_rect = crop_rect;
itr->swap_interval = swap_interval;
itr->multi_fence = multi_fence;
queue_sequence.push_back(slot);
}
std::optional<std::reference_wrapper<const BufferQueue::Buffer>> BufferQueue::AcquireBuffer() {
auto itr = queue.end();
// Iterate to find a queued buffer matching the requested slot.
while (itr == queue.end() && !queue_sequence.empty()) {
u32 slot = queue_sequence.front();
itr = std::find_if(queue.begin(), queue.end(), [&slot](const Buffer& buffer) {
return buffer.status == Buffer::Status::Queued && buffer.slot == slot;
});
queue_sequence.pop_front();
}
if (itr == queue.end())
return {};
itr->status = Buffer::Status::Acquired;
return *itr;
}
void BufferQueue::ReleaseBuffer(u32 slot) {
auto itr = std::find_if(queue.begin(), queue.end(),
[&](const Buffer& buffer) { return buffer.slot == slot; });
ASSERT(itr != queue.end());
ASSERT(itr->status == Buffer::Status::Acquired);
itr->status = Buffer::Status::Free;
free_buffers.push_back(slot);
buffer_wait_event.writable->Signal();
}
void BufferQueue::Disconnect() {
queue.clear();
queue_sequence.clear();
id = 1;
layer_id = 1;
}
u32 BufferQueue::Query(QueryType type) {
LOG_WARNING(Service, "(STUBBED) called type={}", static_cast<u32>(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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