From 5ea6f1e3a7f1c5e30271bebb8d8ebc273f514155 Mon Sep 17 00:00:00 2001
From: William JCM <w.jcm59@gmail.com>
Date: Fri, 25 Nov 2022 11:46:14 +0100
Subject: [PATCH] SaveToo: add HiDPI support to ImGui.

I... kinda forgot to do that.
---
 src/SaveTool/SaveTool.cpp                |  3 ++-
 src/SaveTool/SaveTool_Initialisation.cpp | 10 ++++++----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/SaveTool/SaveTool.cpp b/src/SaveTool/SaveTool.cpp
index e5d2410..0f85774 100644
--- a/src/SaveTool/SaveTool.cpp
+++ b/src/SaveTool/SaveTool.cpp
@@ -203,7 +203,8 @@ void SaveTool::drawEvent() {
 void SaveTool::viewportEvent(ViewportEvent& event) {
     GL::defaultFramebuffer.setViewport({{}, event.framebufferSize()});
 
-    _imgui.relayout(event.windowSize());
+    const Vector2 size = Vector2{windowSize()}/dpiScaling();
+    _imgui.relayout(size, windowSize(), framebufferSize());
 }
 
 void SaveTool::keyPressEvent(KeyEvent& event) {
diff --git a/src/SaveTool/SaveTool_Initialisation.cpp b/src/SaveTool/SaveTool_Initialisation.cpp
index dc41068..e5021e9 100644
--- a/src/SaveTool/SaveTool_Initialisation.cpp
+++ b/src/SaveTool/SaveTool_Initialisation.cpp
@@ -95,12 +95,14 @@ void SaveTool::initialiseGui() {
 
     ImGuiIO& io = ImGui::GetIO();
 
+    const auto size = Vector2{windowSize()}/dpiScaling();
+
     auto reg_font = _rs.getRaw("SourceSansPro-Regular.ttf"_s);
     ImFontConfig font_config;
     font_config.FontDataOwnedByAtlas = false;
     std::strcpy(font_config.Name, "Source Sans Pro");
     io.Fonts->AddFontFromMemoryTTF(const_cast<char*>(reg_font.data()), int(reg_font.size()),
-                                   20.0f, &font_config);
+                                   20.0f * Float(framebufferSize().x()) / size.x(), &font_config);
 
     auto icon_font = _rs.getRaw(FONT_ICON_FILE_NAME_FAS);
     static const ImWchar icon_range[] = { ICON_MIN_FA, ICON_MAX_FA, 0 };
@@ -111,12 +113,12 @@ void SaveTool::initialiseGui() {
     icon_config.OversampleH = icon_config.OversampleV = 1;
     icon_config.GlyphMinAdvanceX = 18.0f;
     io.Fonts->AddFontFromMemoryTTF(const_cast<char*>(icon_font.data()), int(icon_font.size()),
-                                   16.0f, &icon_config, icon_range);
+                                   16.0f * Float(framebufferSize().x()) / size.x(), &icon_config, icon_range);
 
     auto brand_font = _rs.getRaw(FONT_ICON_FILE_NAME_FAB);
     static const ImWchar brand_range[] = { ICON_MIN_FAB, ICON_MAX_FAB, 0 };
     io.Fonts->AddFontFromMemoryTTF(const_cast<char*>(brand_font.data()), int(brand_font.size()),
-                                   16.0f, &icon_config, brand_range);
+                                   16.0f * Float(framebufferSize().x()) / size.x(), &icon_config, brand_range);
 
     auto mono_font = _rs.getRaw("SourceCodePro-Regular.ttf"_s);
     ImVector<ImWchar> range;
@@ -125,7 +127,7 @@ void SaveTool::initialiseGui() {
     builder.AddChar(u'š'); // This allows displaying Vladimír Vondruš' name in Corrade's and Magnum's licences.
     builder.BuildRanges(&range);
     io.Fonts->AddFontFromMemoryTTF(const_cast<char*>(mono_font.data()), int(mono_font.size()),
-                                   18.0f, &font_config, range.Data);
+                                   18.0f * Float(framebufferSize().x()) / size.x(), &font_config, range.Data);
 
     _imgui = ImGuiIntegration::Context(*ImGui::GetCurrentContext(), windowSize());