[OpenGL] Move ImGui functions to separate file
jackun
4 years ago
parent
c3e50db2f4
commit
59113b3ae2
@ -0,0 +1,195 @@
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#include <string>
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#include <iostream>
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#include <memory>
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#include <functional>
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#include "GL/gl3w.h"
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#include <imgui.h>
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#include "imgui_impl_opengl3.h"
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#include "font_default.h"
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#include "overlay.h"
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#include "cpu.h"
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#include "file_utils.h"
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#include "notify.h"
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using namespace MangoHud;
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struct GLVec
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{
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GLint v[4];
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GLint operator[] (size_t i)
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{
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return v[i];
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}
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bool operator== (const GLVec& r)
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{
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return v[0] == r.v[0]
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&& v[1] == r.v[1]
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&& v[2] == r.v[2]
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&& v[3] == r.v[3];
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}
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bool operator!= (const GLVec& r)
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{
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return !(*this == r);
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}
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};
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struct state {
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ImGuiContext *imgui_ctx = nullptr;
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ImFont* font = nullptr;
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ImFont* font1 = nullptr;
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};
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static GLVec last_vp {}, last_sb {};
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static ImVec2 window_size;
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static swapchain_stats sw_stats {};
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static state state;
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static notify_thread notifier;
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static bool cfg_inited = false;
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static bool inited = false;
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static uint32_t vendorID;
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static std::string deviceName;
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overlay_params params {};
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// seems to quit by itself though
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static std::unique_ptr<notify_thread, std::function<void(notify_thread *)>>
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stop_it(¬ifier, [](notify_thread *n){ stop_notifier(*n); });
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void imgui_init()
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{
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if (cfg_inited)
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return;
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parse_overlay_config(¶ms, getenv("MANGOHUD_CONFIG"));
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notifier.params = ¶ms;
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start_notifier(notifier);
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window_size = ImVec2(params.width, params.height);
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init_system_info();
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cfg_inited = true;
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init_cpu_stats(params);
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}
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void imgui_create(void *ctx)
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{
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if (inited)
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return;
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inited = true;
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if (!ctx)
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return;
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imgui_init();
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gl3wInit();
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std::cerr << "GL version: " << glGetString(GL_VERSION) << std::endl;
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glGetIntegerv(GL_MAJOR_VERSION, &sw_stats.version_gl.major);
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glGetIntegerv(GL_MINOR_VERSION, &sw_stats.version_gl.minor);
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deviceName = (char*)glGetString(GL_RENDERER);
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if (deviceName.find("Radeon") != std::string::npos
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|| deviceName.find("AMD") != std::string::npos){
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vendorID = 0x1002;
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} else {
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vendorID = 0x10de;
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}
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init_gpu_stats(vendorID, params);
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// Setup Dear ImGui context
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IMGUI_CHECKVERSION();
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ImGuiContext *saved_ctx = ImGui::GetCurrentContext();
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state.imgui_ctx = ImGui::CreateContext();
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ImGuiIO& io = ImGui::GetIO(); (void)io;
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//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
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//io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
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// Setup Dear ImGui style
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ImGui::StyleColorsDark();
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//ImGui::StyleColorsClassic();
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imgui_custom_style(params);
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glGetIntegerv (GL_VIEWPORT, last_vp.v);
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glGetIntegerv (GL_SCISSOR_BOX, last_sb.v);
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ImGui::GetIO().IniFilename = NULL;
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ImGui::GetIO().DisplaySize = ImVec2(last_vp[2], last_vp[3]);
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ImGui_ImplOpenGL3_Init();
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// Make a dummy GL call (we don't actually need the result)
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// IF YOU GET A CRASH HERE: it probably means that you haven't initialized the OpenGL function loader used by this code.
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// Desktop OpenGL 3/4 need a function loader. See the IMGUI_IMPL_OPENGL_LOADER_xxx explanation above.
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GLint current_texture;
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glGetIntegerv(GL_TEXTURE_BINDING_2D, ¤t_texture);
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int font_size = params.font_size;
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if (!font_size)
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font_size = 24;
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if (!params.font_file.empty() && file_exists(params.font_file)) {
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state.font = io.Fonts->AddFontFromFileTTF(params.font_file.c_str(), font_size);
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state.font1 = io.Fonts->AddFontFromFileTTF(params.font_file.c_str(), font_size * 0.55f);
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} else {
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ImFontConfig font_cfg = ImFontConfig();
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const char* ttf_compressed_base85 = GetDefaultCompressedFontDataTTFBase85();
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const ImWchar* glyph_ranges = io.Fonts->GetGlyphRangesDefault();
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state.font = io.Fonts->AddFontFromMemoryCompressedBase85TTF(ttf_compressed_base85, font_size, &font_cfg, glyph_ranges);
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state.font1 = io.Fonts->AddFontFromMemoryCompressedBase85TTF(ttf_compressed_base85, font_size * 0.55, &font_cfg, glyph_ranges);
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}
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sw_stats.font1 = state.font1;
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// Restore global context or ours might clash with apps that use Dear ImGui
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ImGui::SetCurrentContext(saved_ctx);
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}
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void imgui_shutdown()
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{
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#ifndef NDEBUG
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std::cerr << __func__ << std::endl;
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#endif
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if (state.imgui_ctx) {
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ImGui::SetCurrentContext(state.imgui_ctx);
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ImGui_ImplOpenGL3_Shutdown();
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ImGui::DestroyContext(state.imgui_ctx);
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state.imgui_ctx = nullptr;
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}
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inited = false;
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}
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void imgui_set_context(void *ctx)
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{
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if (!ctx) {
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imgui_shutdown();
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return;
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}
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#ifndef NDEBUG
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std::cerr << __func__ << ": " << ctx << std::endl;
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#endif
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imgui_create(ctx);
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}
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void imgui_render(unsigned int width, unsigned int height)
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{
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if (!state.imgui_ctx)
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return;
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check_keybinds(params);
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update_hud_info(sw_stats, params, vendorID);
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ImGuiContext *saved_ctx = ImGui::GetCurrentContext();
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ImGui::SetCurrentContext(state.imgui_ctx);
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ImGui::GetIO().DisplaySize = ImVec2(width, height);
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ImGui_ImplOpenGL3_NewFrame();
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ImGui::NewFrame();
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{
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std::lock_guard<std::mutex> lk(notifier.mutex);
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position_layer(params, window_size);
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render_imgui(sw_stats, params, window_size, false);
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}
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ImGui::PopStyleVar(3);
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ImGui::Render();
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ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
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ImGui::SetCurrentContext(saved_ctx);
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}
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@ -0,0 +1,7 @@
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#pragma once
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void imgui_init();
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void imgui_create(void *ctx);
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void imgui_shutdown();
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void imgui_set_context(void *ctx);
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void imgui_render(unsigned int width, unsigned int height);
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