Check battery info

src/battery.cpp

@@ -0,0 +1,32 @@
+#include "battery.h"
+
+void BatteryStats::findFiles(){
+    FILE *file;
+    file = fopen("/sys/class/power_supply/BAT1/current_now", "r");
+    powerMap["current_now"] = {file, 0};
+    file = fopen("/sys/class/power_supply/BAT1/voltage_now", "r");
+    powerMap["voltage_now"] = {file, 0};
+    // file = fopen("/sys/class/power_supply/BAT1/charge_now", "r");
+    // powerMap["charge_now"] = {file, 0};
+    // file = fopen("/sys/class/power_supply/BAT1/charge_full", "r");
+    // powerMap["charge_full"] = {file, 0};
+    
+    files_fetched = true;
+}
+
+void BatteryStats::update(){
+    if (!files_fetched)
+        findFiles();
+
+    for(auto &pair : powerMap){
+        if(pair.second.file) {
+            rewind(pair.second.file);
+            fflush(pair.second.file);
+            fscanf(pair.second.file, "%f", &pair.second.value);
+            pair.second.value /= 1000000;
+        }
+    }
+    current_watt = powerMap["current_now"].value * powerMap["voltage_now"].value;
+}
+
+BatteryStats Battery_Stats;

src/battery.h

@@ -0,0 +1,21 @@
+#pragma once
+#include "overlay.h"
+#include "overlay_params.h"
+#include <logging.h>
+#include <vector>
+#include <unordered_map>
+
+class BatteryStats{
+    public:
+        void findFiles();
+        void update();
+        bool files_fetched  = false;
+        struct powerStruct{
+            FILE *file = nullptr;
+            float value;
+        };
+        std::unordered_map<std::string, powerStruct> powerMap;
+        float current_watt = 0;
+};
+
+extern BatteryStats Battery_Stats;

src/meson.build

@@ -79,6 +79,7 @@ if is_unixy
     'elfhacks.cpp',
     'real_dlsym.cpp',
     'pci_ids.cpp',
+    'battery.cpp',
   )
 
   opengl_files = files(

src/overlay.cpp

@@ -9,6 +9,7 @@
 #include "timing.hpp"
 #include "mesa/util/macros.h"
 #include "string_utils.h"
+#include "battery.h"
 #ifdef HAVE_DBUS
 float g_overflow = 50.f /* 3333ms * 0.5 / 16.6667 / 2 (to edge and back) */;
 #endif
@@ -21,6 +22,7 @@ std::vector<logData> graph_data;
 
 void update_hw_info(struct swapchain_stats& sw_stats, struct overlay_params& params, uint32_t vendorID)
 {
+   Battery_Stats.update();
    if (params.enabled[OVERLAY_PARAM_ENABLED_cpu_stats] || logger->is_active()) {
       cpuStats.UpdateCPUData();
 #ifdef __gnu_linux__