diff --git a/arm9/data/config_template.ini b/arm9/data/config_template.ini
index 23dcf63..3e7158b 100644
Binary files a/arm9/data/config_template.ini and b/arm9/data/config_template.ini differ
diff --git a/arm9/source/config.c b/arm9/source/config.c
index 0319f61..d488112 100644
--- a/arm9/source/config.c
+++ b/arm9/source/config.c
@@ -24,6 +24,8 @@
 *         reasonable ways as different from the original version.
 */
 
+#define _GNU_SOURCE // for strchrnul
+
 #include <assert.h>
 #include <strings.h>
 #include "config.h"
@@ -42,6 +44,9 @@
 
 #define MAKE_LUMA_VERSION_MCU(major, minor, build) (u16)(((major) & 0xFF) << 8 | ((minor) & 0x1F) << 5 | ((build) & 7))
 
+#define FLOAT_CONV_MULT 100000000ll
+#define FLOAT_CONV_PRECISION 8u
+
 CfgData configData;
 ConfigurationStatus needConfig;
 static CfgData oldConfig;
@@ -95,10 +100,9 @@ static int parseBoolOption(bool *out, const char *val)
     }
 }
 
-static int parseDecIntOption(s64 *out, const char *val, s64 minval, s64 maxval)
+static int parseDecIntOptionImpl(s64 *out, const char *val, size_t numDigits, s64 minval, s64 maxval)
 {
     *out = 0;
-    size_t numDigits = strlen(val);
     s64 res = 0;
     size_t i = 0;
 
@@ -130,6 +134,61 @@ static int parseDecIntOption(s64 *out, const char *val, s64 minval, s64 maxval)
     }
 }
 
+static int parseDecIntOption(s64 *out, const char *val, s64 minval, s64 maxval)
+{
+    return parseDecIntOptionImpl(out, val, strlen(val), minval, maxval);
+}
+
+static int parseDecFloatOption(s64 *out, const char *val, s64 minval, s64 maxval)
+{
+    char *point = strchrnul(val, '.');
+    if (point == val) {
+        return -1;
+    }
+
+    // Parse integer part, then fractional part
+    s64 intPart = 0;
+    s64 fracPart = 0;
+    int rc = parseDecIntOptionImpl(&intPart, val, point - val, INT64_MIN, INT64_MAX);
+
+    if (rc != 0) {
+        return -1;
+    }
+
+    s64 sign = intPart < 0 ? -1 : 1;
+    s64 intPartAbs = sign == -1 ? -intPart : intPart;
+    s64 res = 0;
+    bool of = __builtin_mul_overflow(intPartAbs, FLOAT_CONV_MULT, &res);
+    
+    if (of) {
+        return -1;
+    }
+    
+    s64 mul = FLOAT_CONV_MULT / 10;
+
+    // Check if there's a fractional part
+    if (point[0] != '\0' && point[1] != '\0') {
+        for (char *pos = point + 1; *pos != '\0' && mul > 0; pos++) {
+            if (*pos < '0' || *pos > '9') {
+                return -1;
+            }
+            
+            res += (*pos - '0') * mul;
+            mul /= 10;
+        }
+    }
+
+
+    res = sign * (res + fracPart);
+
+    if (res <= maxval && res >= minval && !of) {
+        *out = res;
+        return 0;
+    } else {
+        return -1;
+    }
+}
+
 static int parseHexIntOption(u64 *out, const char *val, u64 minval, u64 maxval)
 {
     *out = 0;
@@ -222,6 +281,34 @@ static void menuComboToString(char *out, u32 combo)
         out[-1] = 0;
 }
 
+static int encodedFloatToString(char *out, s64 val)
+{
+    s64 sign = val >= 0 ? 1 : -1;
+
+    s64 intPart = (sign * val) / FLOAT_CONV_MULT;
+    s64 fracPart = (sign * val) % FLOAT_CONV_MULT;
+
+    while (fracPart % 10 != 0) {
+        // Remove trailing zeroes
+        fracPart /= 10;
+    }
+
+    int n = sprintf(out, "%lld", sign * intPart);
+    if (fracPart != 0) {
+        n += sprintf(out + n, ".%0*lld", (int)FLOAT_CONV_PRECISION, fracPart);
+
+        // Remove trailing zeroes
+        int n2 = n - 1;
+        while (out[n2] == '0') {
+            out[n2--] = '\0';
+        }
+
+        n = n2;
+    }
+
+    return n;
+}
+
 static bool hasIniParseError = false;
 static int iniParseErrorLine = 0;
 
@@ -339,15 +426,35 @@ static int configIniHandler(void* user, const char* section, const char* name, c
             CHECK_PARSE_OPTION(parseKeyComboOption(&opt, value));
             cfg->rosalinaMenuCombo = opt;
             return 1;
+        } else if (strcmp(name, "ntp_tz_offset_min") == 0) {
+            s64 opt;
+            CHECK_PARSE_OPTION(parseDecIntOption(&opt, value, -779, 899));
+            cfg->ntpTzOffetMinutes = (s16)opt;
+            return 1;
         } else if (strcmp(name, "screen_filters_cct") == 0) {
             s64 opt;
             CHECK_PARSE_OPTION(parseDecIntOption(&opt, value, 1000, 25100));
             cfg->screenFiltersCct = (u32)opt;
             return 1;
-        } else if (strcmp(name, "ntp_tz_offset_min") == 0) {
+        } else if (strcmp(name, "screen_filters_gamma") == 0) {
             s64 opt;
-            CHECK_PARSE_OPTION(parseDecIntOption(&opt, value, -779, 899));
-            cfg->ntpTzOffetMinutes = (s16)opt;
+            CHECK_PARSE_OPTION(parseDecFloatOption(&opt, value, 0, 1411 * FLOAT_CONV_MULT));
+            cfg->screenFiltersGammaEnc = opt;
+            return 1;
+        } else if (strcmp(name, "screen_filters_contrast") == 0) {
+            s64 opt;
+            CHECK_PARSE_OPTION(parseDecFloatOption(&opt, value, 0, 255 * FLOAT_CONV_MULT));
+            cfg->screenFiltersContrastEnc = opt;
+            return 1;
+        } else if (strcmp(name, "screen_filters_brightness") == 0) {
+            s64 opt;
+            CHECK_PARSE_OPTION(parseDecFloatOption(&opt, value, -1 * FLOAT_CONV_MULT, 1 * FLOAT_CONV_MULT));
+            cfg->screenFiltersBrightnessEnc = opt;
+            return 1;
+        } else if (strcmp(name, "screen_filters_invert") == 0) {
+            bool opt;
+            CHECK_PARSE_OPTION(parseBoolOption(&opt, value));
+            cfg->screenFiltersInvert = opt;
             return 1;
         }
         else {
@@ -423,6 +530,13 @@ static size_t saveLumaIniConfigToStr(char *out)
     static const int pinOptionToDigits[] = { 0, 4, 6, 8 };
     int pinNumDigits = pinOptionToDigits[MULTICONFIG(PIN)];
 
+    char screenFiltersGammaStr[32];
+    char screenFiltersContrastStr[32];
+    char screenFiltersBrightnessStr[32];
+    encodedFloatToString(screenFiltersGammaStr, cfg->screenFiltersGammaEnc);
+    encodedFloatToString(screenFiltersContrastStr, cfg->screenFiltersContrastEnc);
+    encodedFloatToString(screenFiltersBrightnessStr, cfg->screenFiltersBrightnessEnc);
+
     int n = sprintf(
         out, (const char *)config_template_ini,
         lumaVerStr, lumaRevSuffixStr,
@@ -437,7 +551,11 @@ static size_t saveLumaIniConfigToStr(char *out)
         pinNumDigits, n3dsCpuStr, (int)MULTICONFIG(AUTOBOOTMODE),
 
         cfg->hbldr3dsxTitleId, rosalinaMenuComboStr,
-        (int)cfg->screenFiltersCct, (int)cfg->ntpTzOffetMinutes,
+        (int)cfg->ntpTzOffetMinutes,
+
+        (int)cfg->screenFiltersCct, screenFiltersGammaStr,
+        screenFiltersContrastStr, screenFiltersBrightnessStr,
+        (int)cfg->screenFiltersInvert,
 
         cfg->autobootTwlTitleId, (int)cfg->autobootCtrAppmemtype,
 
@@ -547,6 +665,8 @@ bool readConfig(void)
         configData.hbldr3dsxTitleId = HBLDR_DEFAULT_3DSX_TID;
         configData.rosalinaMenuCombo = 1u << 9 | 1u << 7 | 1u << 2; // L+Start+Select
         configData.screenFiltersCct = 6500; // default temp, no-op
+        configData.screenFiltersGammaEnc = 1 * FLOAT_CONV_MULT; // 1.0f
+        configData.screenFiltersContrastEnc = 1 * FLOAT_CONV_MULT; // 1.0f
         configData.autobootTwlTitleId = AUTOBOOT_DEFAULT_TWL_TID;
         ret = false;
     }
diff --git a/arm9/source/config.h b/arm9/source/config.h
index 23b4a04..7a7f162 100644
--- a/arm9/source/config.h
+++ b/arm9/source/config.h
@@ -36,7 +36,7 @@
 
 #define CONFIG_FILE         "config.bin"
 #define CONFIG_VERSIONMAJOR 3
-#define CONFIG_VERSIONMINOR 1
+#define CONFIG_VERSIONMINOR 2
 
 #define BOOTCFG_NAND         BOOTCONFIG(0, 7)
 #define BOOTCFG_FIRM         BOOTCONFIG(3, 7)
diff --git a/arm9/source/patches.c b/arm9/source/patches.c
index 65916b8..93aad77 100644
--- a/arm9/source/patches.c
+++ b/arm9/source/patches.c
@@ -132,8 +132,12 @@ u32 installK11Extension(u8 *pos, u32 size, bool needToInitSd, u32 baseK11VA, u32
             u32 splashDurationMsec;
             u64 hbldr3dsxTitleId;
             u32 rosalinaMenuCombo;
-            u16 screenFiltersCct;
             s16 ntpTzOffetMinutes;
+            u16 screenFiltersCct;
+            s64 screenFiltersGammaEnc;
+            s64 screenFiltersContrastEnc;
+            s64 screenFiltersBrightnessEnc;
+            bool screenFiltersInvert;
             u64 autobootTwlTitleId;
             u8 autobootCtrAppmemtype;
         } info;
@@ -209,8 +213,12 @@ u32 installK11Extension(u8 *pos, u32 size, bool needToInitSd, u32 baseK11VA, u32
     info->splashDurationMsec = configData.splashDurationMsec;
     info->hbldr3dsxTitleId = configData.hbldr3dsxTitleId;
     info->rosalinaMenuCombo = configData.rosalinaMenuCombo;
-    info->screenFiltersCct = configData.screenFiltersCct;
     info->ntpTzOffetMinutes = configData.ntpTzOffetMinutes;
+    info->screenFiltersCct = configData.screenFiltersCct;
+    info->screenFiltersGammaEnc = configData.screenFiltersGammaEnc;
+    info->screenFiltersContrastEnc = configData.screenFiltersContrastEnc;
+    info->screenFiltersBrightnessEnc = configData.screenFiltersBrightnessEnc;
+    info->screenFiltersInvert = configData.screenFiltersInvert;
     info->autobootTwlTitleId = configData.autobootTwlTitleId;
     info->autobootCtrAppmemtype = configData.autobootCtrAppmemtype;
     info->versionMajor = VERSION_MAJOR;
diff --git a/arm9/source/types.h b/arm9/source/types.h
index c6406b9..d1e7b97 100644
--- a/arm9/source/types.h
+++ b/arm9/source/types.h
@@ -69,8 +69,12 @@ typedef struct {
 
     u64 hbldr3dsxTitleId;
     u32 rosalinaMenuCombo;
-    u16 screenFiltersCct;
     s16 ntpTzOffetMinutes;
+    u16 screenFiltersCct;
+    s64 screenFiltersGammaEnc;
+    s64 screenFiltersContrastEnc;
+    s64 screenFiltersBrightnessEnc;
+    bool screenFiltersInvert;
 
     u64 autobootTwlTitleId;
     u8 autobootCtrAppmemtype;
diff --git a/k11_extension/include/globals.h b/k11_extension/include/globals.h
index 94e37a0..163a8cd 100644
--- a/k11_extension/include/globals.h
+++ b/k11_extension/include/globals.h
@@ -130,8 +130,12 @@ typedef struct CfwInfo
     u32 splashDurationMsec;
     u64 hbldr3dsxTitleId;
     u32 rosalinaMenuCombo;
-    u16 screenFiltersCct;
     s16 ntpTzOffetMinutes;
+    u16 screenFiltersCct;
+    s64 screenFiltersGammaEnc;
+    s64 screenFiltersContrastEnc;
+    s64 screenFiltersBrightnessEnc;
+    bool screenFiltersInvert;
     u64 autobootTwlTitleId;
     u8 autobootCtrAppmemtype;
 } CfwInfo;
diff --git a/k11_extension/source/svc/GetSystemInfo.c b/k11_extension/source/svc/GetSystemInfo.c
index 72f22ee..855caee 100644
--- a/k11_extension/source/svc/GetSystemInfo.c
+++ b/k11_extension/source/svc/GetSystemInfo.c
@@ -80,6 +80,18 @@ Result GetSystemInfoHook(s64 *out, s32 type, s32 param)
                 case 0x103:
                     *out = (s64)cfwInfo.ntpTzOffetMinutes;
                     break;
+                case 0x104:
+                    *out = cfwInfo.screenFiltersGammaEnc;
+                    break;
+                case 0x105:
+                    *out = cfwInfo.screenFiltersContrastEnc;
+                    break;
+                case 0x106:
+                    *out = cfwInfo.screenFiltersBrightnessEnc;
+                    break;
+                case 0x107:
+                    *out = (s64)cfwInfo.screenFiltersInvert;
+                    break;
 
                 case 0x200: // isRelease
                     *out = cfwInfo.flags & 1;
diff --git a/sysmodules/rosalina/data/config_template.ini b/sysmodules/rosalina/data/config_template.ini
index 23dcf63..3e7158b 100644
Binary files a/sysmodules/rosalina/data/config_template.ini and b/sysmodules/rosalina/data/config_template.ini differ
diff --git a/sysmodules/rosalina/include/menu.h b/sysmodules/rosalina/include/menu.h
index 8e5f0ae..b4d6dd6 100644
--- a/sysmodules/rosalina/include/menu.h
+++ b/sysmodules/rosalina/include/menu.h
@@ -33,13 +33,14 @@
 
 #define HID_PAD           (REG32(0x10146000) ^ 0xFFF)
 
-
 #define DEFAULT_MENU_COMBO      (KEY_L | KEY_DDOWN | KEY_SELECT)
 #define DIRECTIONAL_KEYS        (KEY_DOWN | KEY_UP | KEY_LEFT | KEY_RIGHT)
 
 #define CORE_APPLICATION  0
 #define CORE_SYSTEM       1
 
+#define FLOAT_CONV_MULT 1e8 // for screen filters
+
 typedef enum MenuItemAction {
     MENU_END = 0,
     METHOD = 1,
diff --git a/sysmodules/rosalina/include/menus/screen_filters.h b/sysmodules/rosalina/include/menus/screen_filters.h
index 679af8f..eaba1ee 100644
--- a/sysmodules/rosalina/include/menus/screen_filters.h
+++ b/sysmodules/rosalina/include/menus/screen_filters.h
@@ -34,9 +34,9 @@ extern int screenFiltersCurrentTemperature;
 extern float screenFiltersCurrentGamma;
 extern float screenFiltersCurrentContrast;
 extern float screenFiltersCurrentBrightness;
+extern bool screenFiltersCurrentInvert;
 
-void ScreenFiltersMenu_SetCct(int cct);
-void ScreenFiltersMenu_RestoreCct(void);
+void ScreenFiltersMenu_RestoreSettings(void);
 
 void ScreenFiltersMenu_SetDefault(void);            // 6500K (default)
 
diff --git a/sysmodules/rosalina/source/main.c b/sysmodules/rosalina/source/main.c
index eb54331..ebe6694 100644
--- a/sysmodules/rosalina/source/main.c
+++ b/sysmodules/rosalina/source/main.c
@@ -163,7 +163,7 @@ static void handleShellNotification(u32 notificationId)
     if (notificationId == 0x213) {
         // Shell opened
         // Note that this notification is fired on system init
-        ScreenFiltersMenu_RestoreCct();
+        ScreenFiltersMenu_RestoreSettings();
         menuShouldExit = false;
     } else {
         // Shell closed
diff --git a/sysmodules/rosalina/source/menu.c b/sysmodules/rosalina/source/menu.c
index 68638d3..d8c3f39 100644
--- a/sysmodules/rosalina/source/menu.c
+++ b/sysmodules/rosalina/source/menu.c
@@ -258,15 +258,32 @@ void menuThreadMain(void)
     while (!isServiceUsable("ac:u") || !isServiceUsable("hid:USER"))
         svcSleepThread(500 * 1000 * 1000LL);
 
-    s64 out;
+    s64 out = 0;
+
     svcGetSystemInfo(&out, 0x10000, 0x102);
     screenFiltersCurrentTemperature = (int)(u32)out;
     if (screenFiltersCurrentTemperature < 1000 || screenFiltersCurrentTemperature > 25100)
         screenFiltersCurrentTemperature = 6500;
 
-    // Careful about race conditions here
-    if (screenFiltersCurrentTemperature != 6500)
-        ScreenFiltersMenu_SetCct(screenFiltersCurrentTemperature);
+    svcGetSystemInfo(&out, 0x10000, 0x104);
+    screenFiltersCurrentGamma = (float)(out / FLOAT_CONV_MULT);
+    if (screenFiltersCurrentGamma < 0.0f || screenFiltersCurrentGamma > 1411.0f)
+        screenFiltersCurrentGamma = 1.0f;
+
+    svcGetSystemInfo(&out, 0x10000, 0x105);
+    screenFiltersCurrentContrast = (float)(out / FLOAT_CONV_MULT);
+    if (screenFiltersCurrentContrast < 0.0f || screenFiltersCurrentContrast > 255.0f)
+        screenFiltersCurrentContrast = 1.0f;
+
+    svcGetSystemInfo(&out, 0x10000, 0x106);
+    screenFiltersCurrentBrightness = (float)(out / FLOAT_CONV_MULT);
+    if (screenFiltersCurrentBrightness < -1.0f || screenFiltersCurrentBrightness > 1.0f)
+        screenFiltersCurrentBrightness = 0.0f;
+
+    svcGetSystemInfo(&out, 0x10000, 0x107);
+    screenFiltersCurrentInvert = (bool)out;
+
+    ScreenFiltersMenu_RestoreSettings();
 
     hidInit(); // assume this doesn't fail
     isHidInitialized = true;
diff --git a/sysmodules/rosalina/source/menus/miscellaneous.c b/sysmodules/rosalina/source/menus/miscellaneous.c
index 2c12907..7697779 100644
--- a/sysmodules/rosalina/source/menus/miscellaneous.c
+++ b/sysmodules/rosalina/source/menus/miscellaneous.c
@@ -98,8 +98,12 @@ typedef struct CfgData {
 
     u64 hbldr3dsxTitleId;
     u32 rosalinaMenuCombo;
-    u16 screenFiltersCct;
     s16 ntpTzOffetMinutes;
+    u16 screenFiltersCct;
+    float screenFiltersGamma;
+    float screenFiltersContrast;
+    float screenFiltersBrightness;
+    bool screenFiltersInvert;
 
     u64 autobootTwlTitleId;
     u8 autobootCtrAppmemtype;
@@ -297,6 +301,13 @@ static size_t saveLumaIniConfigToStr(char *out, const CfgData *cfg)
     static const int pinOptionToDigits[] = { 0, 4, 6, 8 };
     int pinNumDigits = pinOptionToDigits[MULTICONFIG(PIN)];
 
+    char screenFiltersGammaStr[32];
+    char screenFiltersContrastStr[32];
+    char screenFiltersBrightnessStr[32];
+    floatToString(screenFiltersGammaStr, cfg->screenFiltersGamma, 6, false);
+    floatToString(screenFiltersContrastStr, cfg->screenFiltersContrast, 6, false);
+    floatToString(screenFiltersBrightnessStr, cfg->screenFiltersBrightness, 6, false);
+
     int n = sprintf(
         out, (const char *)config_template_ini,
         lumaVerStr, lumaRevSuffixStr,
@@ -311,7 +322,11 @@ static size_t saveLumaIniConfigToStr(char *out, const CfgData *cfg)
         pinNumDigits, n3dsCpuStr, (int)MULTICONFIG(AUTOBOOTMODE),
 
         cfg->hbldr3dsxTitleId, rosalinaMenuComboStr,
-        (int)cfg->screenFiltersCct, (int)cfg->ntpTzOffetMinutes,
+        (int)cfg->ntpTzOffetMinutes,
+
+        (int)cfg->screenFiltersCct, screenFiltersGammaStr,
+        screenFiltersContrastStr, screenFiltersBrightnessStr,
+        (int)cfg->screenFiltersInvert,
 
         cfg->autobootTwlTitleId, (int)cfg->autobootCtrAppmemtype,
 
@@ -370,8 +385,12 @@ void MiscellaneousMenu_SaveSettings(void)
     configData.splashDurationMsec = splashDurationMsec;
     configData.hbldr3dsxTitleId = Luma_SharedConfig->hbldr_3dsx_tid;
     configData.rosalinaMenuCombo = menuCombo;
-    configData.screenFiltersCct = (u16)screenFiltersCurrentTemperature;
     configData.ntpTzOffetMinutes = (s16)lastNtpTzOffset;
+    configData.screenFiltersCct = (u16)screenFiltersCurrentTemperature;
+    configData.screenFiltersGamma = screenFiltersCurrentGamma;
+    configData.screenFiltersContrast = screenFiltersCurrentContrast;
+    configData.screenFiltersBrightness = screenFiltersCurrentBrightness;
+    configData.screenFiltersInvert = screenFiltersCurrentInvert;
     configData.autobootTwlTitleId = autobootTwlTitleId;
     configData.autobootCtrAppmemtype = autobootCtrAppmemtype;
 
diff --git a/sysmodules/rosalina/source/menus/screen_filters.c b/sysmodules/rosalina/source/menus/screen_filters.c
index 47ee859..a0a9376 100644
--- a/sysmodules/rosalina/source/menus/screen_filters.c
+++ b/sysmodules/rosalina/source/menus/screen_filters.c
@@ -81,7 +81,7 @@ static u8 ScreenFilterMenu_CalculatePolynomialColorLutComponent(const float coef
 
     level = powf(CLAMP(level, 0.0f, 1.0f), gamma);
     s32 levelInt = (s32)(255.0f * level + 0.5f); // round up
-    return (u8)CLAMP(levelInt, 0, 255);
+    return (u8)CLAMP(levelInt, 0, 255); // clamp again just to be sure
 }
 
 static void ScreenFilterMenu_WritePolynomialColorLut(const float coeffs[][3], bool invert, float gamma, u32 dim)
@@ -121,7 +121,7 @@ static void ScreenFiltersMenu_ApplyColorSettings(void)
     ScreenFilterMenu_WritePolynomialColorLut(poly, inv, g, 1);
 }
 
-void ScreenFiltersMenu_SetCct(int cct)
+static void ScreenFiltersMenu_SetCct(int cct)
 {
     screenFiltersCurrentTemperature = cct;
     ScreenFiltersMenu_ApplyColorSettings();
@@ -151,7 +151,7 @@ void ScreenFiltersMenu_Set##name(void)\
     ScreenFiltersMenu_SetCct(temp);\
 }
 
-void ScreenFiltersMenu_RestoreCct(void)
+void ScreenFiltersMenu_RestoreSettings(void)
 {
     // Not initialized/default: return
     if (ScreenFiltersMenu_IsDefaultSettings())
diff --git a/sysmodules/rosalina/source/utils.c b/sysmodules/rosalina/source/utils.c
index 5cd5232..fa42c48 100644
--- a/sysmodules/rosalina/source/utils.c
+++ b/sysmodules/rosalina/source/utils.c
@@ -175,7 +175,7 @@ int floatToString(char *out, float f, u32 precision, bool pad)
         return sprintf(out, "-inf");
 
     static const u64 pow10[] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 };
-    precision = precision >= 10 ? 10 : precision;
+    precision = precision >= 6 ? 6 : precision; // result inaccurate after 1e-6
 
     u64 mult = pow10[precision];
     double f2 = fabs((double)f) * mult + 0.5;
@@ -188,5 +188,16 @@ int floatToString(char *out, float f, u32 precision, bool pad)
     if (pad)
         return sprintf(out, "%s%llu.%0*llu", sign, intPart, (int)precision, fracPart);
     else
-        return sprintf(out, "%s%llu.%llu", sign, intPart, fracPart);
+    {
+        int n = sprintf(out, "%s%llu", sign, intPart);
+        if (fracPart == 0)
+            return n;
+
+        n += sprintf(out + n, ".%0*llu", (int)precision, fracPart);
+        
+        int n2 = n - 1;
+        while (out[n2] == '0')
+            out[n2--] = '\0';
+        return n2;
+    }
 }