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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/core.h"
#include "core/hle/service/am/display_layer_manager.h"
#include "core/hle/service/nvnflinger/hwc_layer.h"
#include "core/hle/service/sm/sm.h"
#include "core/hle/service/vi/application_display_service.h"
#include "core/hle/service/vi/container.h"
#include "core/hle/service/vi/manager_display_service.h"
#include "core/hle/service/vi/manager_root_service.h"
#include "core/hle/service/vi/shared_buffer_manager.h"
#include "core/hle/service/vi/vi_results.h"
#include "core/hle/service/vi/vi_types.h"
namespace Service::AM {
DisplayLayerManager::DisplayLayerManager() = default;
DisplayLayerManager::~DisplayLayerManager() {
this->Finalize();
}
void DisplayLayerManager::Initialize(Core::System& system, Kernel::KProcess* process,
AppletId applet_id, LibraryAppletMode mode) {
R_ASSERT(system.ServiceManager()
.GetService<VI::IManagerRootService>("vi:m", true)
->GetDisplayService(&m_display_service, VI::Policy::Compositor));
R_ASSERT(m_display_service->GetManagerDisplayService(&m_manager_display_service));
m_process = process;
m_system_shared_buffer_id = 0;
m_system_shared_layer_id = 0;
m_applet_id = applet_id;
m_library_applet_mode = mode;
m_buffer_sharing_enabled = false;
m_blending_enabled = mode == LibraryAppletMode::PartialForeground ||
mode == LibraryAppletMode::PartialForegroundIndirectDisplay;
}
void DisplayLayerManager::Finalize() {
if (!m_manager_display_service) {
return;
}
// Clean up managed layers.
for (const auto& layer : m_managed_display_layers) {
m_manager_display_service->DestroyManagedLayer(layer);
}
for (const auto& layer : m_managed_display_recording_layers) {
m_manager_display_service->DestroyManagedLayer(layer);
}
// Clean up shared layers.
if (m_buffer_sharing_enabled) {
m_manager_display_service->DestroySharedLayerSession(m_process);
}
m_manager_display_service = nullptr;
m_display_service = nullptr;
}
Result DisplayLayerManager::CreateManagedDisplayLayer(u64* out_layer_id) {
R_UNLESS(m_manager_display_service != nullptr, VI::ResultOperationFailed);
// TODO(Subv): Find out how AM determines the display to use, for now just
// create the layer in the Default display.
u64 display_id;
R_TRY(m_display_service->OpenDisplay(&display_id, VI::DisplayName{"Default"}));
R_TRY(m_manager_display_service->CreateManagedLayer(
out_layer_id, 0, display_id, Service::AppletResourceUserId{m_process->GetProcessId()}));
m_manager_display_service->SetLayerVisibility(m_visible, *out_layer_id);
(void)m_display_service->GetContainer()->SetLayerStackMask(*out_layer_id,
this->GetLayerStackMask());
if (m_applet_id != AppletId::Application) {
(void)m_manager_display_service->SetLayerBlending(m_blending_enabled, *out_layer_id);
if (m_applet_id == AppletId::OverlayDisplay) {
(void)m_manager_display_service->SetLayerZIndex(Overlay, *out_layer_id);
} else {
(void)m_manager_display_service->SetLayerZIndex(Foreground, *out_layer_id);
}
}
m_display_service->GetContainer()->SetLayerZIndex(*out_layer_id, true);
m_managed_display_layers.emplace(*out_layer_id);
R_SUCCEED();
}
Result DisplayLayerManager::CreateManagedDisplaySeparableLayer(u64* out_layer_id,
u64* out_recording_layer_id) {
R_UNLESS(m_manager_display_service != nullptr, VI::ResultOperationFailed);
// TODO(Subv): Find out how AM determines the display to use, for now just
// create the layer in the Default display.
// This calls nn::vi::CreateRecordingLayer() which creates another layer.
// Currently we do not support more than 1 layer per display, output 1 layer id for now.
// Outputting 1 layer id instead of the expected 2 has not been observed to cause any adverse
// side effects.
*out_recording_layer_id = 0;
R_RETURN(this->CreateManagedDisplayLayer(out_layer_id));
}
Result DisplayLayerManager::IsSystemBufferSharingEnabled() {
// Succeed if already enabled.
R_SUCCEED_IF(m_buffer_sharing_enabled);
// Ensure we can access shared layers.
R_UNLESS(m_manager_display_service != nullptr, VI::ResultOperationFailed);
R_UNLESS(m_applet_id != AppletId::Application, VI::ResultPermissionDenied);
// Create the shared layer.
u64 display_id;
R_TRY(m_display_service->OpenDisplay(&display_id, VI::DisplayName{"Default"}));
R_TRY(m_manager_display_service->CreateSharedLayerSession(m_process, &m_system_shared_buffer_id,
&m_system_shared_layer_id, display_id,
m_blending_enabled));
// We succeeded, so set up remaining state.
m_buffer_sharing_enabled = true;
// Ensure the overlay layer is visible
m_manager_display_service->SetLayerVisibility(m_visible, m_system_shared_layer_id);
(void)m_manager_display_service->SetLayerBlending(m_blending_enabled, m_system_shared_layer_id);
s32 initial_z = Foreground;
if (m_applet_id == AppletId::OverlayDisplay) {
initial_z = Overlay;
(void)m_manager_display_service->SetLayerZIndex(initial_z, m_system_shared_layer_id);
(void)m_display_service->GetContainer()->SetLayerIsOverlay(m_system_shared_layer_id, true);
}
m_manager_display_service->SetLayerZIndex(initial_z, m_system_shared_layer_id);
m_display_service->GetContainer()->SetLayerZIndex(m_system_shared_layer_id, true);
m_managed_display_layers.emplace(m_system_shared_layer_id);
R_SUCCEED();
}
Result DisplayLayerManager::GetSystemSharedLayerHandle(u64* out_system_shared_buffer_id,
u64* out_system_shared_layer_id) {
R_TRY(this->IsSystemBufferSharingEnabled());
*out_system_shared_buffer_id = m_system_shared_buffer_id;
*out_system_shared_layer_id = m_system_shared_layer_id;
R_SUCCEED();
}
u32 DisplayLayerManager::GetLayerStackMask() const {
using Nvnflinger::LayerStackBit;
using Nvnflinger::LayerStackId;
constexpr u32 Displayed = LayerStackBit(LayerStackId::Default);
constexpr u32 Screenshot = LayerStackBit(LayerStackId::Screenshot);
constexpr u32 Recording = LayerStackBit(LayerStackId::Recording);
constexpr u32 LastFrame = LayerStackBit(LayerStackId::LastFrame);
constexpr u32 Debug = LayerStackBit(LayerStackId::ApplicationForDebug);
switch (m_applet_id) {
case AppletId::Application:
return Displayed | Screenshot | Recording | LastFrame | Debug;
case AppletId::OverlayDisplay:
return Displayed;
case AppletId::QLaunch:
return Displayed;
default:
break;
}
switch (m_library_applet_mode) {
case LibraryAppletMode::AllForeground:
case LibraryAppletMode::AllForegroundInitiallyHidden:
return Displayed | Screenshot | LastFrame;
default:
return Displayed | Screenshot;
}
}
void DisplayLayerManager::SetWindowVisibility(bool visible) {
if (m_visible == visible) {
return;
}
m_visible = visible;
if (m_manager_display_service) {
if (m_system_shared_layer_id) {
LOG_INFO(Service_VI, "shared_layer={} visible={} applet_id={}",
m_system_shared_layer_id, m_visible, static_cast<u32>(m_applet_id));
m_manager_display_service->SetLayerVisibility(m_visible, m_system_shared_layer_id);
}
for (const auto layer_id : m_managed_display_layers) {
LOG_INFO(Service_VI, "managed_layer={} visible={} applet_id={}",
layer_id, m_visible, static_cast<u32>(m_applet_id));
m_manager_display_service->SetLayerVisibility(m_visible, layer_id);
}
}
}
bool DisplayLayerManager::GetWindowVisibility() const {
return m_visible;
}
void DisplayLayerManager::SetOverlayZIndex(s32 z_index) {
if (!m_manager_display_service) {
return;
}
if (m_system_shared_layer_id) {
m_manager_display_service->SetLayerZIndex(z_index, m_system_shared_layer_id);
LOG_INFO(Service_VI, "called, shared_layer={} z={}", m_system_shared_layer_id, z_index);
}
for (const auto layer_id : m_managed_display_layers) {
m_manager_display_service->SetLayerZIndex(z_index, layer_id);
LOG_INFO(Service_VI, "called, managed_layer={} z={}", layer_id, z_index);
}
}
Result DisplayLayerManager::WriteAppletCaptureBuffer(bool* out_was_written,
s32* out_fbshare_layer_index,
VI::CaptureKind kind) {
R_UNLESS(m_buffer_sharing_enabled, VI::ResultPermissionDenied);
R_RETURN(m_display_service->GetContainer()->GetSharedBufferManager()->WriteAppletCaptureBuffer(
out_was_written, out_fbshare_layer_index, kind));
}
Result DisplayLayerManager::ClearAppletCaptureBuffer(s32 fbshare_layer_index, u32 color) {
R_UNLESS(m_buffer_sharing_enabled, VI::ResultPermissionDenied);
R_RETURN(m_display_service->GetContainer()->GetSharedBufferManager()->ClearAppletCaptureBuffer(
fbshare_layer_index, color));
}
} // namespace Service::AM
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