revised for date/time stamps instead.

Source/capture.cpp

@@ -5,6 +5,9 @@
  */
 #include <cstdint>
 #include <fstream>
+#include <sstream>
+#include <iomanip>
+#include <fmt/chrono.h>
 
 #include "DiabloUI/diabloui.h"
 #include "dx.h"
@@ -130,15 +133,16 @@ bool CapturePix(const Surface &buf, std::ofstream *out)
 
 std::ofstream CaptureFile(std::string *dstPath)
 {
-	char filename[sizeof("screen0000000000.PCX") / sizeof(char)];
-	for (uint32_t i = 0; i <= std::numeric_limits<uint32_t>::max(); ++i) {
-		snprintf(filename, sizeof(filename) / sizeof(char), "screen%d.PCX", i);
-		*dstPath = paths::PrefPath() + filename;
-		if (!FileExists(dstPath->c_str())) {
-			return std::ofstream(*dstPath, std::ios::binary | std::ios::trunc);
-		}
+	std::time_t tt = std::time(nullptr);
+	std::tm *tm = std::localtime(&tt);
+	std::string filename = fmt::format("Screenshot from {:%Y-%m-%d %H-%M-%S}", *tm);
+	*dstPath = paths::PrefPath() + filename + ".PCX";
+	int i = 0;
+	while (FileExists(dstPath->c_str())) {
+		i++;
+		*dstPath = paths::PrefPath() + filename + "-" + std::to_string(i) + ".PCX";
 	}
-	return {};
+	return std::ofstream(*dstPath, std::ios::binary | std::ios::trunc);
 }
 
 /**