From 3265b52c174bb9a5f694fcb2d436f7956657b6aa Mon Sep 17 00:00:00 2001
From: sirlemonhead <sirlemonhead@outlook.com>
Date: Sat, 14 Dec 2019 00:33:26 +0000
Subject: [PATCH] Add support for Powerslave demo version

# Conflicts:
#	source/exhumed/src/exhumed.cpp
#	source/exhumed/src/grpscan.cpp
#	source/exhumed/src/grpscan.h
#	source/exhumed/src/sound.cpp
---
 source/exhumed/src/exhumed.cpp | 84 +++++++++++++++++++++++-----------
 source/exhumed/src/exhumed.h   |  6 ++-
 source/exhumed/src/menu.cpp    | 11 +++++
 source/exhumed/src/sound.cpp   |  3 +-
 4 files changed, 75 insertions(+), 29 deletions(-)

diff --git a/source/exhumed/src/exhumed.cpp b/source/exhumed/src/exhumed.cpp
index 61267f078..c462006b9 100644
--- a/source/exhumed/src/exhumed.cpp
+++ b/source/exhumed/src/exhumed.cpp
@@ -1701,6 +1701,61 @@ static int32_t check_filename_casing(void)
 
 int32_t r_maxfpsoffset = 0;
 
+void PatchDemoStrings()
+{
+    if (!ISDEMOVER)
+        return;
+
+    if (EXHUMED) {
+        gString[60] = "PICK UP A COPY OF EXHUMED";
+    }
+    else {
+        gString[60] = "PICK UP A COPY OF POWERSLAVE";
+    }
+
+    gString[61] = "TODAY TO CONTINUE THE ADVENTURE!";
+    gString[62] = "MORE LEVELS, NASTIER CREATURES";
+    gString[63] = "AND THE EVIL DOINGS OF THE";
+    gString[64] = "KILMAAT AWAIT YOU IN THE FULL";
+    gString[65] = "VERSION OF THE GAME.";
+    gString[66] = "TWENTY LEVELS, PLUS 12 NETWORK";
+    gString[67] = "PLAY LEVELS CAN BE YOURS!";
+    gString[68] = "END";
+}
+
+void ExitGame()
+{
+    if (bRecord) {
+        fclose(vcrfp);
+    }
+
+    FadeSong();
+    if (CDplaying()) {
+        fadecdaudio();
+    }
+
+    StopAllSounds();
+    StopLocalSound();
+    mysaveconfig();
+
+    if (bSerialPlay)
+    {
+        if (nNetPlayerCount != 0) {
+            bSendBye = kTrue;
+            UpdateSerialInputs();
+        }
+    }
+    else
+    {
+        if (nNetPlayerCount != 0) {
+            SendGoodbye();
+        }
+    }
+
+    ShutDown();
+    exit(0);
+}
+
 static int32_t nonsharedtimer;
 
 void CheckCommandLine(int argc, char const* const* argv, int &doTitle)
@@ -1905,6 +1960,7 @@ int GameInterface::app_main()
 
 
 
+    PatchDemoStrings();
     // loc_115F5:
     nItemTextIndex = FindGString("ITEMS");
     nFirstPassword = FindGString("PASSWORDS");
@@ -2508,34 +2564,8 @@ LOOP3:
         fps++;
     }
 EXITGAME:
-    if (bRecord) {
-        fclose(vcrfp);
-    }
 
-    FadeSong();
-    if (CDplaying()) {
-        fadecdaudio();
-    }
-
-    StopAllSounds();
-    StopLocalSound();
-    mysaveconfig();
-
-    if (bSerialPlay)
-    {
-        if (nNetPlayerCount != 0) {
-            bSendBye = kTrue;
-            UpdateSerialInputs();
-        }
-    }
-    else
-    {
-        if (nNetPlayerCount != 0) {
-            SendGoodbye();
-        }
-    }
-
-    ShutDown();
+    ExitGame();
     return 0;
 }
 
diff --git a/source/exhumed/src/exhumed.h b/source/exhumed/src/exhumed.h
index 66713abd6..55b877164 100644
--- a/source/exhumed/src/exhumed.h
+++ b/source/exhumed/src/exhumed.h
@@ -95,6 +95,7 @@ struct demo_input
 };
 #pragma pack(pop)
 
+void ExitGame();
 void ShutDown(void);
 void DebugOut(const char *fmt, ...);
 int ExhumedMain(int argc, char *argv[]);
@@ -234,12 +235,15 @@ extern int lCountDown;
 extern short bSlipMode;
 
 extern short nItemTextIndex;
-extern const char *gString[];
+extern const char* gString[];
+extern const char* gPSDemoString[];
+extern const char* gEXDemoString[];
 
 extern int bVanilla;
 
 #define POWERSLAVE  (g_gameType & GAMEFLAG_POWERSLAVE)
 #define EXHUMED     (g_gameType & GAMEFLAG_EXHUMED)
+#define ISDEMOVER   (g_gameType & GAMEFLAG_DEMO)
 
 extern double g_frameDelay;
 
diff --git a/source/exhumed/src/menu.cpp b/source/exhumed/src/menu.cpp
index c5442bacd..f6f66b3a9 100644
--- a/source/exhumed/src/menu.cpp
+++ b/source/exhumed/src/menu.cpp
@@ -2016,6 +2016,12 @@ void GoToTheCinema(int nVal)
         }
     }
 
+    if (ISDEMOVER) {
+        if (!waloff[cinematile]) {
+            tileCreate(cinematile, 320, 200);
+        }
+    }
+
     FadeOut(kFalse);
     StopAllSounds();
     NoClip();
@@ -2095,6 +2101,11 @@ void GoToTheCinema(int nVal)
 
     GrabPalette();
     Clip();
+
+    // quit the game if we've finished level 4 and displayed the advert text
+    if (ISDEMOVER && nVal == 3) {
+        ExitGame();
+    }
 }
 
 
diff --git a/source/exhumed/src/sound.cpp b/source/exhumed/src/sound.cpp
index a344454c1..559188856 100644
--- a/source/exhumed/src/sound.cpp
+++ b/source/exhumed/src/sound.cpp
@@ -460,7 +460,8 @@ int LoadSound(const char *sound)
     }
     else
     {
-        Printf("Unable to open sound '%s'!\n", buffer);
+        if (!ISDEMOVER)  // demo tries to load sound files it doesn't have
+            Printf("Unable to open sound '%s'!\n", buffer);
         SoundBuf[i] = NULL;
         SoundLen[i] = 0;
         //return hVoc;