Add _N suffix to additional screenshots taken within 1 second

src/main/java/io/github/ultimateboomer/resolutioncontrol/ResolutionControlMod.java

@@ -4,6 +4,7 @@
 import io.github.ultimateboomer.resolutioncontrol.client.gui.screen.SettingsScreen;
 import io.github.ultimateboomer.resolutioncontrol.util.Config;
 import io.github.ultimateboomer.resolutioncontrol.util.ConfigHandler;
+import io.github.ultimateboomer.resolutioncontrol.util.RCUtil;
 import io.github.ultimateboomer.resolutioncontrol.util.ScalingAlgorithm;
 import net.fabricmc.api.ModInitializer;
 import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
@@ -90,14 +91,18 @@ public void onInitialize() {
 					client.player.sendMessage(
 							new TranslatableText("resolutioncontrol.screenshot.wait"), false);
 				} else {
-					ScreenshotUtils.saveScreenshot(client.runDirectory,
-							SCREENSHOT_PREFIX + ScreenshotUtils.getScreenshotFilename(null),
-							framebuffer.textureWidth, framebuffer.textureHeight, framebuffer,
-							text -> client.player.sendMessage(text, false));
+					saveScreenshot(framebuffer);
 				}
 			}
 		});
 	}
+
+	private void saveScreenshot(Framebuffer fb) {
+		ScreenshotUtils.saveScreenshot(client.runDirectory,
+				SCREENSHOT_PREFIX + RCUtil.getScreenshotFilename(null),
+				fb.textureWidth, fb.textureHeight, fb,
+				text -> client.player.sendMessage(text, false));
+	}
 
 	public void setShouldScale(boolean shouldScale) {
 		if (shouldScale == this.shouldScale) return;
@@ -152,10 +157,7 @@ public void setShouldScale(boolean shouldScale) {
 						window.getFramebufferWidth(), window.getFramebufferHeight()
 				);
 
-				ScreenshotUtils.saveScreenshot(client.runDirectory,
-						SCREENSHOT_PREFIX + ScreenshotUtils.getScreenshotFilename(null),
-						framebuffer.textureWidth, framebuffer.textureHeight, screenshotFrameBuffer,
-						text -> client.player.sendMessage(text, false));
+				saveScreenshot(screenshotFrameBuffer);
 
 				if (!isScreenshotFramebufferAlwaysAllocated()) {
 					screenshotFrameBuffer.delete();

src/main/java/io/github/ultimateboomer/resolutioncontrol/client/gui/screen/MainSettingsScreen.java

@@ -1,7 +1,7 @@
 package io.github.ultimateboomer.resolutioncontrol.client.gui.screen;
 
 import io.github.ultimateboomer.resolutioncontrol.ResolutionControlMod;
-import io.github.ultimateboomer.resolutioncontrol.util.RCMathUtil;
+import io.github.ultimateboomer.resolutioncontrol.util.RCUtil;
 import net.minecraft.client.gui.screen.Screen;
 import net.minecraft.client.gui.widget.ButtonWidget;
 import net.minecraft.client.gui.widget.TextFieldWidget;
@@ -152,7 +152,7 @@ public void render(MatrixStack matrices, int mouseX, int mouseY, float time) {
 				centerX - 55, centerY - 24, 0x000000);
 
 		drawCenteredString(matrices, "\u00a78" + text("settings.main.estimate",
-				RCMathUtil.formatMetric(ResolutionControlMod.getInstance().getEstimatedMemory()) + "B")
+				RCUtil.formatMetric(ResolutionControlMod.getInstance().getEstimatedMemory()) + "B")
 				.getString() + "\u00a7r",
 				centerX - 55, centerY - 12, 0x000000);
 

src/main/java/io/github/ultimateboomer/resolutioncontrol/client/gui/screen/ScreenshotSettingsScreen.java

@@ -1,6 +1,6 @@
 package io.github.ultimateboomer.resolutioncontrol.client.gui.screen;
 
-import io.github.ultimateboomer.resolutioncontrol.util.RCMathUtil;
+import io.github.ultimateboomer.resolutioncontrol.util.RCUtil;
 import net.minecraft.client.gui.screen.Screen;
 import net.minecraft.client.gui.widget.ButtonWidget;
 import net.minecraft.client.gui.widget.TextFieldWidget;
@@ -122,7 +122,7 @@ public void render(MatrixStack matrices, int mouseX, int mouseY, float delta) {
 
         drawLeftAlignedString(matrices,
                 "\u00a78" + text("settings.main.estimate").getString()
-                        + " " + RCMathUtil.formatMetric(estimatedSize) + "B",
+                        + " " + RCUtil.formatMetric(estimatedSize) + "B",
                 centerX + 25, centerY + 12,
                 0x000000);
     }

src/main/java/io/github/ultimateboomer/resolutioncontrol/util/RCUtil.java

@@ -0,0 +1,50 @@
+package io.github.ultimateboomer.resolutioncontrol.util;
+
+import java.io.File;
+import java.io.IOException;
+import java.text.DateFormat;
+import java.text.NumberFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public final class RCUtil {
+    private static final String[] UNITS = "KMGTPE".split("");
+    private static final NumberFormat FORMAT = NumberFormat.getNumberInstance();
+
+    private static final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd_HH.mm.ss");
+
+    /**
+     * Format number with metric conversion (K, M, G etc)
+     */
+    public static String formatMetric(long n) {
+        if (n < 1000) {
+            return n + " ";
+        }
+
+        int log10 = (int) Math.log10(n);
+        int decimalPlace = (int) Math.pow(10, 2 - log10 % 3);
+        int displayDigits = (int) (n / Math.pow(10, log10 - 2));
+
+        float result = (float) displayDigits / decimalPlace;
+        return String.format("%s %s", FORMAT.format(result), UNITS[log10 / 3 - 1]);
+    }
+
+    public static File getScreenshotFilename(File directory) {
+        String string = DATE_FORMAT.format(new Date());
+        int i = 1;
+
+        while (true) {
+            File file = new File(directory, string + (i == 1 ? "" : "_" + i) + ".png");
+            if (!file.exists()) {
+                try {
+                    file.createNewFile();
+                } catch (IOException e) {
+                    throw new IllegalStateException(e);
+                }
+                return file;
+            }
+
+            ++i;
+        }
+    }
+}