HLE/Applets: Stub Mint (eShop) Applet (#2463)

This allows Phoenix Wright - Dual Destinies to boot.

src/core/CMakeLists.txt

@@ -40,6 +40,7 @@ set(SRCS
             hle/applets/applet.cpp
             hle/applets/erreula.cpp
             hle/applets/mii_selector.cpp
+            hle/applets/mint.cpp
             hle/applets/swkbd.cpp
             hle/kernel/address_arbiter.cpp
             hle/kernel/client_port.cpp
@@ -219,6 +220,7 @@ set(HEADERS
             hle/applets/applet.h
             hle/applets/erreula.h
             hle/applets/mii_selector.h
+            hle/applets/mint.h
             hle/applets/swkbd.h
             hle/kernel/address_arbiter.h
             hle/kernel/client_port.h

src/core/hle/applets/applet.cpp

@@ -12,6 +12,7 @@
 #include "core/hle/applets/applet.h"
 #include "core/hle/applets/erreula.h"
 #include "core/hle/applets/mii_selector.h"
+#include "core/hle/applets/mint.h"
 #include "core/hle/applets/swkbd.h"
 #include "core/hle/result.h"
 #include "core/hle/service/apt/apt.h"
@@ -56,6 +57,10 @@ ResultCode Applet::Create(Service::APT::AppletId id) {
     case Service::APT::AppletId::Error2:
         applets[id] = std::make_shared<ErrEula>(id);
         break;
+    case Service::APT::AppletId::Mint:
+    case Service::APT::AppletId::Mint2:
+        applets[id] = std::make_shared<Mint>(id);
+        break;
     default:
         LOG_ERROR(Service_APT, "Could not create applet %u", id);
         // TODO(Subv): Find the right error code

src/core/hle/applets/mint.cpp

@@ -0,0 +1,72 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/string_util.h"
+#include "core/hle/applets/mint.h"
+#include "core/hle/service/apt/apt.h"
+
+namespace HLE {
+namespace Applets {
+
+ResultCode Mint::ReceiveParameter(const Service::APT::MessageParameter& parameter) {
+    if (parameter.signal != static_cast<u32>(Service::APT::SignalType::Request)) {
+        LOG_ERROR(Service_APT, "unsupported signal %u", parameter.signal);
+        UNIMPLEMENTED();
+        // TODO(Subv): Find the right error code
+        return ResultCode(-1);
+    }
+
+    // The Request message contains a buffer with the size of the framebuffer shared
+    // memory.
+    // Create the SharedMemory that will hold the framebuffer data
+    Service::APT::CaptureBufferInfo capture_info;
+    ASSERT(sizeof(capture_info) == parameter.buffer.size());
+
+    memcpy(&capture_info, parameter.buffer.data(), sizeof(capture_info));
+
+    // TODO: allocated memory never released
+    using Kernel::MemoryPermission;
+    // Allocate a heap block of the required size for this applet.
+    heap_memory = std::make_shared<std::vector<u8>>(capture_info.size);
+    // Create a SharedMemory that directly points to this heap block.
+    framebuffer_memory = Kernel::SharedMemory::CreateForApplet(
+        heap_memory, 0, heap_memory->size(), MemoryPermission::ReadWrite,
+        MemoryPermission::ReadWrite, "Mint Memory");
+
+    // Send the response message with the newly created SharedMemory
+    Service::APT::MessageParameter result;
+    result.signal = static_cast<u32>(Service::APT::SignalType::Response);
+    result.buffer.clear();
+    result.destination_id = static_cast<u32>(Service::APT::AppletId::Application);
+    result.sender_id = static_cast<u32>(id);
+    result.object = framebuffer_memory;
+
+    Service::APT::SendParameter(result);
+    return RESULT_SUCCESS;
+}
+
+ResultCode Mint::StartImpl(const Service::APT::AppletStartupParameter& parameter) {
+    is_running = true;
+
+    // TODO(Subv): Set the expected fields in the response buffer before resending it to the
+    // application.
+    // TODO(Subv): Reverse the parameter format for the Mint applet
+
+    // Let the application know that we're closing
+    Service::APT::MessageParameter message;
+    message.buffer.resize(parameter.buffer.size());
+    std::fill(message.buffer.begin(), message.buffer.end(), 0);
+    message.signal = static_cast<u32>(Service::APT::SignalType::WakeupByExit);
+    message.destination_id = static_cast<u32>(Service::APT::AppletId::Application);
+    message.sender_id = static_cast<u32>(id);
+    Service::APT::SendParameter(message);
+
+    is_running = false;
+    return RESULT_SUCCESS;
+}
+
+void Mint::Update() {}
+
+} // namespace Applets
+} // namespace HLE

src/core/hle/applets/mint.h

@@ -0,0 +1,29 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/applets/applet.h"
+#include "core/hle/kernel/shared_memory.h"
+
+namespace HLE {
+namespace Applets {
+
+class Mint final : public Applet {
+public:
+    explicit Mint(Service::APT::AppletId id) : Applet(id) {}
+
+    ResultCode ReceiveParameter(const Service::APT::MessageParameter& parameter) override;
+    ResultCode StartImpl(const Service::APT::AppletStartupParameter& parameter) override;
+    void Update() override;
+
+private:
+    /// This SharedMemory will be created when we receive the Request message.
+    /// It holds the framebuffer info retrieved by the application with
+    /// GSPGPU::ImportDisplayCaptureInfo
+    Kernel::SharedPtr<Kernel::SharedMemory> framebuffer_memory;
+};
+
+} // namespace Applets
+} // namespace HLE