Merge pull request #1 from averne/master

Simple configuration parsing for size scaling

.gitignore

@@ -4,5 +4,7 @@ cmake-build-debug/
 cmake-build-release/
 
 build-linux/
+build/
 
 *.mgc
+imgui.ini

CMakeLists.txt

@@ -8,7 +8,11 @@ pkg_search_module(GLFW REQUIRED glfw3)
 find_package(OpenGL REQUIRED)
 
 include_directories(include ${GLFW_INCLUDE_DIRS} libs/ImGui/include libs/glad/include)
-SET(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -DIMGUI_IMPL_OPENGL_LOADER_GLAD -static-libstdc++ -static-libgcc -static")
+SET(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -DIMGUI_IMPL_OPENGL_LOADER_GLAD")
+
+if (WIN32)
+    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libstdc++ -static-libgcc -static")
+endif (WIN32)
 
 add_executable(ImHex
         source/main.cpp

include/window.hpp

@@ -24,6 +24,9 @@ namespace hex {
             return static_cast<T*>(this->m_views.back());
         }
 
+    public:
+        float m_globalScale = 1.0f, m_fontScale = 1.0f;
+
     private:
         void frameBegin();
         void frameEnd();

source/window.cpp

@@ -3,6 +3,7 @@
 #include <iostream>
 
 #include "imgui.h"
+#include "imgui_internal.h"
 #include "imgui_impl_glfw.h"
 #include "imgui_impl_opengl3.h"
 
@@ -11,6 +12,44 @@
 
 namespace hex {
 
+    namespace {
+
+        void *ImHexSettingsHandler_ReadOpenFn(ImGuiContext *ctx, ImGuiSettingsHandler *, const char *) {
+            return ctx; // Unused, but the return value has to be non-null
+        }
+
+        void ImHexSettingsHandler_ReadLine(ImGuiContext*, ImGuiSettingsHandler *handler, void *, const char* line) {
+            auto *window = reinterpret_cast<Window *>(handler->UserData);
+
+            float scale;
+            if (sscanf(line, "Scale=%f", &scale) == 1)            { window->m_globalScale = scale; }
+            else if (sscanf(line, "FontScale=%f", &scale) == 1)   { window->m_fontScale   = scale; }
+        }
+
+        void ImHexSettingsHandler_ApplyAll(ImGuiContext *ctx, ImGuiSettingsHandler *handler) {
+            auto *window = reinterpret_cast<Window *>(handler->UserData);
+            auto &style  = ImGui::GetStyle();
+            auto &io     = ImGui::GetIO();
+
+            if (window->m_globalScale != 0.0f)
+                style.ScaleAllSizes(window->m_globalScale);
+            if (window->m_fontScale != 0.0f)
+                io.FontGlobalScale = window->m_fontScale;
+        }
+
+        void ImHexSettingsHandler_WriteAll(ImGuiContext* ctx, ImGuiSettingsHandler *handler, ImGuiTextBuffer *buf) {
+            auto *window = reinterpret_cast<Window *>(handler->UserData);
+
+            buf->reserve(buf->size() + 0x20); // Ballpark reserve
+
+            buf->appendf("[%s][General]\n", handler->TypeName);
+            buf->appendf("Scale=%.1f\n", window->m_globalScale);
+            buf->appendf("FontScale=%.1f\n", window->m_fontScale);
+            buf->append("\n");
+        }
+
+    }
+
     Window::Window() {
         this->initGLFW();
         this->initImGui();
@@ -141,10 +180,21 @@ namespace hex {
 
     void Window::initImGui() {
         IMGUI_CHECKVERSION();
-        ImGui::CreateContext();
-        ImGuiIO& io = ImGui::GetIO(); (void)io;
+        auto *ctx = ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
         io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;
 
+        // Install custom settings handler
+        ImGuiSettingsHandler handler;
+        handler.TypeName = "ImHex";
+        handler.TypeHash = ImHashStr("ImHex");
+        handler.ReadOpenFn = ImHexSettingsHandler_ReadOpenFn;
+        handler.ReadLineFn = ImHexSettingsHandler_ReadLine;
+        handler.ApplyAllFn = ImHexSettingsHandler_ApplyAll;
+        handler.WriteAllFn = ImHexSettingsHandler_WriteAll;
+        handler.UserData   = this;
+        ctx->SettingsHandlers.push_back(handler);
+
         ImGui::StyleColorsDark();
 
         ImGui_ImplGlfw_InitForOpenGL(this->m_window, true);