dolphin/Source/Core/VideoCommon/OnScreenDisplay.cpp

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// Copyright 2009 Dolphin Emulator Project
2015-05-17 23:08:10 +00:00
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <algorithm>
#include <list>
#include <map>
#include <mutex>
#include <string>
#include "imgui.h"
#include "Common/CommonTypes.h"
#include "Common/Timer.h"
#include "Core/ConfigManager.h"
#include "VideoCommon/OnScreenDisplay.h"
namespace OSD
{
constexpr float LEFT_MARGIN = 10.0f; // Pixels to the left of OSD messages.
constexpr float TOP_MARGIN = 10.0f; // Pixels above the first OSD message.
constexpr float WINDOW_PADDING = 4.0f; // Pixels between subsequent OSD messages.
struct Message
{
Message() {}
Message(const std::string& text_, u32 timestamp_, u32 color_)
: text(text_), timestamp(timestamp_), color(color_)
{
}
std::string text;
u32 timestamp;
u32 color;
};
static std::multimap<MessageType, Message> s_messages;
static std::mutex s_messages_mutex;
static ImVec4 RGBAToImVec4(const u32 rgba)
{
return ImVec4(static_cast<float>((rgba >> 16) & 0xFF) / 255.0f,
static_cast<float>((rgba >> 8) & 0xFF) / 255.0f,
static_cast<float>((rgba >> 0) & 0xFF) / 255.0f,
static_cast<float>((rgba >> 24) & 0xFF) / 255.0f);
}
static float DrawMessage(int index, const Message& msg, const ImVec2& position, int time_left)
{
// We have to provide a window name, and these shouldn't be duplicated.
// So instead, we generate a name based on the number of messages drawn.
const std::string window_name = StringFromFormat("osd_%d", index);
// The size must be reset, otherwise the length of old messages could influence new ones.
ImGui::SetNextWindowPos(position);
ImGui::SetNextWindowSize(ImVec2(0.0f, 0.0f));
// Gradually fade old messages away.
const float alpha = std::min(1.0f, std::max(0.0f, time_left / 1024.0f));
ImGui::PushStyleVar(ImGuiStyleVar_Alpha, alpha);
float window_height = 0.0f;
if (ImGui::Begin(window_name.c_str(), nullptr,
ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoInputs |
ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoSavedSettings |
ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoNav |
ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoFocusOnAppearing))
{
// Use %s in case message contains %.
ImGui::TextColored(RGBAToImVec4(msg.color), "%s", msg.text.c_str());
window_height =
ImGui::GetWindowSize().y + (WINDOW_PADDING * ImGui::GetIO().DisplayFramebufferScale.y);
}
ImGui::End();
ImGui::PopStyleVar();
return window_height;
}
void AddTypedMessage(MessageType type, const std::string& message, u32 ms, u32 rgba)
{
std::lock_guard<std::mutex> lock(s_messages_mutex);
s_messages.erase(type);
s_messages.emplace(type, Message(message, Common::Timer::GetTimeMs() + ms, rgba));
}
void AddMessage(const std::string& message, u32 ms, u32 rgba)
{
std::lock_guard<std::mutex> lock(s_messages_mutex);
s_messages.emplace(MessageType::Typeless,
Message(message, Common::Timer::GetTimeMs() + ms, rgba));
}
void DrawMessages()
{
if (!SConfig::GetInstance().bOnScreenDisplayMessages)
return;
{
std::lock_guard<std::mutex> lock(s_messages_mutex);
const u32 now = Common::Timer::GetTimeMs();
float current_x = LEFT_MARGIN * ImGui::GetIO().DisplayFramebufferScale.x;
float current_y = TOP_MARGIN * ImGui::GetIO().DisplayFramebufferScale.y;
int index = 0;
auto it = s_messages.begin();
while (it != s_messages.end())
{
const Message& msg = it->second;
const int time_left = static_cast<int>(msg.timestamp - now);
current_y += DrawMessage(index++, msg, ImVec2(current_x, current_y), time_left);
if (time_left <= 0)
it = s_messages.erase(it);
else
++it;
}
}
}
void ClearMessages()
{
std::lock_guard<std::mutex> lock(s_messages_mutex);
s_messages.clear();
}
}