From c75659db82d152719fd6130ba4cb975a441009d5 Mon Sep 17 00:00:00 2001
From: WerWolv <werwolv98@gmail.com>
Date: Wed, 4 Aug 2021 18:57:53 +0200
Subject: [PATCH] ui: Make splash screen DPI aware

---
 include/init/splash_window.hpp |  2 ++
 source/init/splash_window.cpp  | 31 +++++++++++++++++++++----------
 2 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/include/init/splash_window.hpp b/include/init/splash_window.hpp
index 0d026cf8b..885d6b95a 100644
--- a/include/init/splash_window.hpp
+++ b/include/init/splash_window.hpp
@@ -27,6 +27,8 @@ namespace hex::init {
         float m_progress = 0;
         std::string m_currTaskName;
 
+        float m_globalScale = 1.0F;
+
         void initGLFW();
         void initImGui();
 
diff --git a/source/init/splash_window.cpp b/source/init/splash_window.cpp
index 2f862aa2c..8044a1fbe 100644
--- a/source/init/splash_window.cpp
+++ b/source/init/splash_window.cpp
@@ -5,6 +5,7 @@
 #include <hex/resources.hpp>
 
 #include <imgui.h>
+#define IMGUI_DEFINE_MATH_OPERATORS
 #include <imgui_internal.h>
 #include <imgui_imhex_extensions.h>
 #include <imgui_impl_glfw.h>
@@ -92,17 +93,18 @@ namespace hex::init {
 
                 auto drawList = ImGui::GetOverlayDrawList();
 
-                drawList->AddImage(splashTexture, ImVec2(0, 0), ImVec2(splashWidth, splashHeight));
+                drawList->AddImage(splashTexture, ImVec2(0, 0), ImVec2(splashWidth, splashHeight) * this->m_globalScale);
+
+                drawList->AddText(ImVec2(15, 120) * this->m_globalScale, ImColor(0xFF, 0xFF, 0xFF, 0xFF), hex::format("WerWolv 2020 - {0}", &__DATE__[7]).c_str());
 
                 #if defined(DEBUG)
-                    drawList->AddText(ImVec2(15, 120), ImColor(0xFF, 0xFF, 0xFF, 0xFF), hex::format("WerWolv 2020 - {0}", &__DATE__[7]).c_str());
-                    drawList->AddText(ImVec2(15, 140), ImColor(0xFF, 0xFF, 0xFF, 0xFF), hex::format("{0} : {1} {2}@{3}", IMHEX_VERSION, ICON_FA_CODE_BRANCH, GIT_BRANCH, GIT_COMMIT_HASH).c_str());
+                    drawList->AddText(ImVec2(15, 140) * this->m_globalScale, ImColor(0xFF, 0xFF, 0xFF, 0xFF), hex::format("{0} : {1} {2}@{3}", IMHEX_VERSION, ICON_FA_CODE_BRANCH, GIT_BRANCH, GIT_COMMIT_HASH).c_str());
                 #else
-                    drawList->AddText(ImVec2(15, 120), ImColor(0xFF, 0xFF, 0xFF, 0xFF), hex::format("WerWolv 2020 - {0}", &__DATE__[7]).c_str());
-                    drawList->AddText(ImVec2(15, 140), ImColor(0xFF, 0xFF, 0xFF, 0xFF), hex::format("{0}", IMHEX_VERSION).c_str());
+                    drawList->AddText(ImVec2(15, 140) * this->m_globalScale, ImColor(0xFF, 0xFF, 0xFF, 0xFF), hex::format("{0}", IMHEX_VERSION).c_str());
                 #endif
-                drawList->AddRectFilled(ImVec2(0, splashHeight - 5), ImVec2(splashWidth * this->m_progress, splashHeight), 0xFFFFFFFF);
-                drawList->AddText(ImVec2(15, splashHeight - 25), ImColor(0xFF, 0xFF, 0xFF, 0xFF),
+
+                drawList->AddRectFilled(ImVec2(0, splashHeight - 5) * this->m_globalScale, ImVec2(splashWidth * this->m_progress, splashHeight) * this->m_globalScale, 0xFFFFFFFF);
+                drawList->AddText(ImVec2(15, splashHeight - 25) * this->m_globalScale, ImColor(0xFF, 0xFF, 0xFF, 0xFF),
                                   hex::format("[{}] {}", "|/-\\"[ImU32(ImGui::GetTime() * 15) % 4], this->m_currTaskName).c_str());
             }
 
@@ -164,7 +166,14 @@ namespace hex::init {
         glfwWindowHint(GLFW_DECORATED, GLFW_FALSE);
         glfwWindowHint(GLFW_FLOATING, GLFW_TRUE);
 
-        this->m_window = glfwCreateWindow(640, 400, "ImHex", nullptr, nullptr);
+        if (GLFWmonitor *monitor = glfwGetPrimaryMonitor(); monitor != nullptr) {
+            float xscale, yscale;
+            glfwGetMonitorContentScale(monitor, &xscale, &yscale);
+
+            this->m_globalScale = std::midpoint(xscale, yscale);
+        }
+
+        this->m_window = glfwCreateWindow(640 * this->m_globalScale, 400 * this->m_globalScale, "ImHex", nullptr, nullptr);
         if (this->m_window == nullptr) {
             log::fatal("Failed to create GLFW window!");
             exit(EXIT_FAILURE);
@@ -191,11 +200,13 @@ namespace hex::init {
 
         auto &io = ImGui::GetIO();
 
+        ImGui::GetStyle().ScaleAllSizes(this->m_globalScale);
+
         io.Fonts->Clear();
 
         ImFontConfig cfg;
         cfg.OversampleH = cfg.OversampleV = 1, cfg.PixelSnapH = true;
-        cfg.SizePixels = 13.0f;
+        cfg.SizePixels = 13.0f * this->m_globalScale;
         io.Fonts->AddFontDefault(&cfg);
 
         cfg.MergeMode = true;
@@ -206,7 +217,7 @@ namespace hex::init {
         };
         std::uint8_t *px;
         int w, h;
-        io.Fonts->AddFontFromMemoryCompressedTTF(font_awesome_compressed_data, font_awesome_compressed_size, 11.0f, &cfg, fontAwesomeRange);
+        io.Fonts->AddFontFromMemoryCompressedTTF(font_awesome_compressed_data, font_awesome_compressed_size, 11.0f * this->m_globalScale, &cfg, fontAwesomeRange);
         io.Fonts->GetTexDataAsRGBA32(&px, &w, &h);
 
         // Create new font atlas