BlackMark
30eccf749d
Run clang-format (the repo's .clang-format: LLVM base, 120 cols, tabs, Allman functions) over every source file so the tree is formatter-clean. Whitespace only -- no behavior change; full x64 + x86 suites pass. Also set SortIncludes: false in .clang-format. Windows include order is load-bearing (windows.h must precede tlhelp32.h / mmreg.h / xinput.h / dinput.h; winsock2.h must precede windows.h), and the default alphabetical sort reorders tlhelp32.h ahead of windows.h -- a build break. Leaving order alone keeps the manual, correct grouping.
105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
#include "imgui_layer.hpp"
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#include <string>
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#include <imgui.h>
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#include <imgui_impl_dx11.h>
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#include <imgui_impl_win32.h>
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#include "coop/dpi.hpp"
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#include "coop/tool_paths.hpp"
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#include "ui/app_chrome.hpp"
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#include "util/utf8.hpp"
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namespace coop {
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ImGuiLayer::~ImGuiLayer()
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{
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if (initialized_) {
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ImGui_ImplDX11_Shutdown();
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ImGui_ImplWin32_Shutdown();
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ImGui::DestroyContext();
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initialized_ = false;
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}
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}
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bool ImGuiLayer::init(HWND hwnd, ID3D11Device* device, ID3D11DeviceContext* context)
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{
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IMGUI_CHECKVERSION();
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ImGui::CreateContext();
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ImGuiIO& io = ImGui::GetIO();
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// Persist the panel layout next to the executable so window positions/sizes survive
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// restarts. CWD is unreliable when Steam launches us under the donor appid, so anchor
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// to the exe directory. If a layout already exists, tell the chrome not to force the
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// computed default on startup (which would clobber the restored positions).
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const std::wstring ini_w = exe_directory() + L"coop_layout.ini";
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const bool had_layout = GetFileAttributesW(ini_w.c_str()) != INVALID_FILE_ATTRIBUTES;
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// ImGui treats IniFilename as UTF-8 (it converts to wide for _wfopen), so narrow to UTF-8, not
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// the system ANSI code page.
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ini_path_ = narrow(ini_w);
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io.IniFilename = ini_path_.c_str();
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set_layout_persisted(had_layout);
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if (!ImGui_ImplWin32_Init(hwnd)) {
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return false;
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}
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if (!ImGui_ImplDX11_Init(device, context)) {
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return false;
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}
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initialized_ = true;
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// Scale the overlay (font + style) to the monitor the window opened on. The process is
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// per-monitor-DPI-aware (set in wWinMain), so GetDpiForWindow returns that monitor's real DPI.
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apply_dpi(GetDpiForWindow(hwnd));
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return true;
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}
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void ImGuiLayer::apply_dpi(unsigned dpi)
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{
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const float scale = dpi_scale_from(dpi);
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ImGuiIO& io = ImGui::GetIO();
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// Rebuild the font atlas at the DPI-scaled pixel size so ImGui's built-in default font is
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// rasterized crisp at the target size, rather than bitmap-stretched the way io.FontGlobalScale
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// would leave it. scaled_font_px() scales the one named base-size constant.
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io.Fonts->Clear();
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ImFontConfig cfg;
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cfg.SizePixels = scaled_font_px(dpi);
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io.Fonts->AddFontDefault(&cfg);
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// Reset to the base dark theme, then scale spacing/padding/border sizes to match. Resetting
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// first keeps repeated DPI changes from compounding (ScaleAllSizes multiplies the style in place).
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ImGui::StyleColorsDark();
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ImGui::GetStyle().ScaleAllSizes(scale);
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// Drop the DX11 backend's cached font texture so it rebuilds from the new atlas next frame. Before
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// the first frame nothing is built yet, so this is a harmless no-op during init().
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if (initialized_) {
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ImGui_ImplDX11_InvalidateDeviceObjects();
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}
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dpi_scale_ = scale;
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}
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void ImGuiLayer::set_dpi(unsigned dpi)
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{
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if (!initialized_ || dpi_scale_from(dpi) == dpi_scale_) {
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return; // not up yet, or the scale didn't actually change -- skip a needless atlas rebuild
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}
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apply_dpi(dpi);
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}
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void ImGuiLayer::begin_frame()
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{
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ImGui_ImplDX11_NewFrame();
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ImGui_ImplWin32_NewFrame();
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ImGui::NewFrame();
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}
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void ImGuiLayer::end_frame()
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{
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ImGui::Render();
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ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
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}
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} // namespace coop
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