Fixes

src/runtime/text/FontAtlasProcess.cpp

@@ -2,10 +2,20 @@
 
 #include "NativeHandles.h"
 
+#include <string>
 #include <windows.h>
 
 namespace RenderCadenceCompositor
 {
+namespace
+{
+std::string LastWindowsErrorText()
+{
+	const DWORD errorCode = GetLastError();
+	return std::to_string(static_cast<unsigned long>(errorCode));
+}
+}
+
 bool FontAtlasBuilder::RunProcess(const std::string& commandLine, const std::filesystem::path& workingDirectory, std::string& error)
 {
 	STARTUPINFOA startupInfo = {};
@@ -17,7 +27,7 @@ bool FontAtlasBuilder::RunProcess(const std::string& commandLine, const std::fil
 
 	if (!CreateProcessA(nullptr, mutableCommandLine.data(), nullptr, nullptr, FALSE, CREATE_NO_WINDOW, nullptr, workingDirectory.string().c_str(), &startupInfo, &processInfo))
 	{
-		error = "Failed to launch msdf-atlas-gen.exe.";
+		error = "Failed to launch msdf-atlas-gen.exe. Windows error: " + LastWindowsErrorText() + ".";
 		return false;
 	}
 
@@ -29,7 +39,7 @@ bool FontAtlasBuilder::RunProcess(const std::string& commandLine, const std::fil
 	GetExitCodeProcess(processHandle.get(), &exitCode);
 	if (exitCode != 0)
 	{
-		error = "msdf-atlas-gen.exe returned a non-zero exit code.";
+		error = "msdf-atlas-gen.exe returned a non-zero exit code: " + std::to_string(static_cast<unsigned long>(exitCode)) + ".";
 		return false;
 	}