--- a/tests/blittest.c	Thu Dec 08 15:56:36 2022 +0200
+++ b/tests/blittest.c	Thu Dec 08 15:59:22 2022 +0200
@@ -8,7 +8,7 @@
 #define DM_COLORS (256)
 
 char *optFontFile = "font.ttf";
-BOOL optBenchmark = FALSE;
+bool optBenchmark = false;
 int optVFlags = SDL_SWSURFACE | SDL_HWPALETTE;
 int optScrWidth = 640, optScrHeight = 480, optFontSize = 20, optScrDepth = 32;
 int optBenchmarkLen = 20;
@@ -33,7 +33,7 @@
 }
 
 
-BOOL argHandleOpt(const int optN, char *optArg, char *currArg)
+bool argHandleOpt(const int optN, char *optArg, char *currArg)
 {
     switch (optN) {
     case 0:
@@ -62,7 +62,7 @@
                 if (w < 320 || h < 200 || w > 3200 || h > 3200)
                 {
                     dmErrorMsg("Invalid width or height: %d x %d\n", w, h);
-                    return FALSE;
+                    return false;
                 }
                 optScrWidth = w;
                 optScrHeight = h;
@@ -70,21 +70,21 @@
             else
             {
                 dmErrorMsg("Invalid size argument '%s'.\n", optArg);
-                return FALSE;
+                return false;
             }
         }
         break;
 
     case 7:
-        optBenchmark = TRUE;
+        optBenchmark = true;
         break;
 
     default:
         dmErrorMsg("Unknown option '%s'.\n", currArg);
-        return FALSE;
+        return false;
     }
 
-    return TRUE;
+    return true;
 }
 
 
@@ -110,13 +110,13 @@
         r->x, r->y, r->w, r->h);
 }
 
-BOOL DM_InitializeVideo(SDL_Surface **screen)
+bool DM_InitializeVideo(SDL_Surface **screen)
 {
     *screen = SDL_SetVideoMode(optScrWidth, optScrHeight, optScrDepth, optVFlags | SDL_RESIZABLE);
     if (*screen == NULL)
     {
         dmErrorMsg("Can't SDL_SetVideoMode(): %s\n", SDL_GetError());
-        return FALSE;
+        return false;
     }
 
 #if 0
@@ -131,7 +131,7 @@
     DM_PrintRect(stderr, &((*screen)->clip_rect));
 #endif
 
-    return TRUE;
+    return true;
 }
 
 void DM_Random(SDL_Surface *screen, int q)
@@ -184,7 +184,7 @@
             DMVector vr, vl, va;
             DMFloat vrayLen, vfactor;
             int vlen;
-            BOOL wasHit;
+            bool wasHit;
 
             // Perform shadow occlusion via simplistic raytracing
             vr.x = i;
@@ -203,7 +203,7 @@
             dm_vector_copy(&vr, light);
 
             vlen = 0;
-            wasHit = FALSE;
+            wasHit = false;
             do
             {
                 float h;
@@ -216,7 +216,7 @@
 
                 // Check for hits
                 if (h > vr.z)
-                    wasHit = TRUE;
+                    wasHit = true;
                 else
                 {
                     // Move forwards
@@ -286,7 +286,7 @@
     SDL_Color fontcol={255,155,155,0};
     SDL_Event event;
     int mouseX, mouseY;
-    BOOL initSDL = FALSE, initTTF = FALSE, exitFlag, showMap = FALSE;
+    bool initSDL = false, initTTF = false, exitFlag, showMap = false;
 
     dmInitProg("blittest", "dmlib blittest", "0.2", NULL, NULL);
     if (!dmArgsProcess(argc, argv, optList, optListN,
@@ -298,7 +298,7 @@
         dmErrorMsg("Could not initialize SDL: %s\n", SDL_GetError());
         goto error_exit;
     }
-    initSDL = TRUE;
+    initSDL = true;
 
 
     if (TTF_Init() < 0)
@@ -306,7 +306,7 @@
         dmErrorMsg("Could not initialize FreeType/TTF: %s\n", SDL_GetError());
         goto error_exit;
     }
-    initTTF = TRUE;
+    initTTF = true;
 
     font = TTF_OpenFont(optFontFile, optFontSize);
     if (font == NULL)
@@ -351,7 +351,7 @@
 
 
     int numFrames = 0, startTime = SDL_GetTicks(), endTime = 0;
-    exitFlag = FALSE;
+    exitFlag = false;
 
     if (optBenchmark)
         dmMsg(0, "Starting benchmark, running for %d seconds.\n", optBenchmarkLen);
@@ -367,7 +367,7 @@
                 case SDL_KEYDOWN:
                     switch (event.key.keysym.sym)
                     {
-                        case SDLK_ESCAPE: exitFlag = TRUE; break;
+                        case SDLK_ESCAPE: exitFlag = true; break;
 
                         case SDLK_F5:
                             showMap = !showMap;
@@ -432,7 +432,7 @@
         if (optBenchmark)
         {
             if (endTime - startTime > optBenchmarkLen * 1000)
-                exitFlag = TRUE;
+                exitFlag = true;
         }
     }