HLE/APT: Initial HLE support for applets.

Currently only the SWKBD is emulated, and there's currently no way to ask the user for input, so it always returns "Subv" as the text.

src/core/hle/applets/swkbd.cpp

@@ -0,0 +1,73 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/logging/log.h"
+
+#include "core/hle/applets/swkbd.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace HLE {
+namespace Applets {
+
+SoftwareKeyboard::SoftwareKeyboard(Service::APT::AppletId id) : Applet(id) {
+    // Create the SharedMemory that will hold the framebuffer data
+    // TODO(Subv): What size should we use here?
+    using Kernel::MemoryPermission;
+    framebuffer_memory = Kernel::SharedMemory::Create(0x1000, MemoryPermission::ReadWrite, MemoryPermission::ReadWrite, "SoftwareKeyboard Memory");
+}
+
+ResultCode SoftwareKeyboard::ReceiveParameter(Service::APT::MessageParameter const& parameter) {
+    if (parameter.signal != static_cast<u32>(Service::APT::SignalType::LibAppJustStarted)) {
+        LOG_ERROR(Service_APT, "unsupported signal %u", parameter.signal);
+        UNIMPLEMENTED();
+        // TODO(Subv): Find the right error code
+        return ResultCode(-1);
+    }
+
+    Service::APT::MessageParameter result;
+    // The buffer passed in parameter contains the data returned by GSPGPU::ImportDisplayCaptureInfo
+    result.signal = static_cast<u32>(Service::APT::SignalType::LibAppFinished);
+    result.data = nullptr; 
+    result.buffer_size = 0;
+    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 SoftwareKeyboard::Start(Service::APT::AppletStartupParameter const& parameter) {
+    memcpy(&config, parameter.data, parameter.buffer_size);
+    text_memory = boost::static_pointer_cast<Kernel::SharedMemory, Kernel::Object>(parameter.object);
+
+    // TODO(Subv): Verify if this is the correct behavior
+    memset(text_memory->GetPointer(), 0, text_memory->size);
+
+    // TODO(Subv): Remove this hardcoded text
+    const wchar_t str[] = L"Subv";
+    memcpy(text_memory->GetPointer(), str, 4 * sizeof(wchar_t));
+    
+    // TODO(Subv): Ask for input and write it to the shared memory
+    // TODO(Subv): Find out what are the possible values for the return code,
+    // some games seem to check for a hardcoded 2
+    config.return_code = 2;
+    config.text_length = 5;
+    config.text_offset = 0;
+
+    Service::APT::MessageParameter message;
+    message.buffer_size = sizeof(SoftwareKeyboardConfig);
+    message.data = reinterpret_cast<u8*>(&config);
+    message.signal = static_cast<u32>(Service::APT::SignalType::LibAppClosed);
+    message.destination_id = static_cast<u32>(Service::APT::AppletId::Application);
+    message.sender_id = static_cast<u32>(id);
+    Service::APT::SendParameter(message);
+
+    return RESULT_SUCCESS;
+}
+
+}
+} // namespace