fix SCREEN_READER_AVAILABLE property on windows

doc/src/appendix/Changelog.md

@@ -7,7 +7,8 @@ This document lists all major changes that have taken place in NVGT since we sta
 * NVGT will no longer fail if a plugin pragma with the same plugin name gets encountered multiple times.
 * Fix minor error in bgt_compat's set_sound_storage function where the filename stored was not caching for display properly.
 * Improve the downloads page to include release dates and headings for old versions as well as file sizes, yes we do still intend to integrate with github releases.
-* A fun little aside, visit https://nvtt.zip/windows, /mac or /linux to instantly download the latest NVGT for that platform!
+* Fix the broken SCREEN_READER_AVAILABLE property on windows.
+* New documentation on compiling a game for distrobution.
 
 ## New in 0.87.1-beta (06/16/2024):
 * This patches an issue with the speech dispatcher support on linux where calling screen_reader_unload() would cause a segmentation fault if it had not loaded to begin with due to no libspeechd being available.

src/srspeech.cpp

@@ -16,11 +16,11 @@
 #elif defined(__APPLE__)
  #include "apple.h"
 #elif defined(__linux__) || defined(__unix__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
- #include <Poco/SharedLibrary.h>
  #define using_speechd
 #endif
 #include <string>
 #include <Poco/AtomicFlag.h>
+ #include <Poco/SharedLibrary.h>
 #include <Poco/UnicodeConverter.h>
 #include "srspeech.h"
 
@@ -48,15 +48,15 @@ Poco::AtomicFlag g_SRSpeechAvailable;
 
 bool ScreenReaderLoad() {
  #if defined(_WIN32)
- g_SRSpeechAvailable.set();
- if (!g_SRSpeechAvailable) return false;
  if (g_SRSpeechLoaded) return true;
- __try {
- Tolk_Load();
- } __except (1) {
+ try {
+ Poco::SharedLibrary("Tolk.dll");
+ } catch(Poco::Exception&) {
  g_SRSpeechAvailable.reset();
  return false;
  }
+ Tolk_Load();
+ g_SRSpeechAvailable.set();
  g_SRSpeechLoaded.set();
  return true;
  #elif defined(__APPLE__)
@@ -96,7 +96,9 @@ bool ScreenReaderLoad() {
 void ScreenReaderUnload() {
 if (!g_SRSpeechLoaded) return;
  #if defined(_WIN32)
+ __try {
  Tolk_Unload();
+ } __except(1) {}
  g_SRSpeechLoaded.reset();
  #elif defined(__APPLE__)
  voice_over_speech_shutdown(); // Really just stops a hacky thread intended to get speech event queuing working.