--- a/tools/lib64gfx.c	Thu Dec 08 15:56:36 2022 +0200
+++ b/tools/lib64gfx.c	Thu Dec 08 15:59:22 2022 +0200
@@ -12,7 +12,7 @@
 #define BUF_SIZE_GROW      (4*1024)
 
 
-int dmC64PaletteFromC64Colors(DMPalette **ppal, const DMColor *colors, const BOOL mixed)
+int dmC64PaletteFromC64Colors(DMPalette **ppal, const DMColor *colors, const bool mixed)
 {
     int res;
 
@@ -52,7 +52,7 @@
 }
 
 
-int dmC64PaletteFromC64Palette(DMPalette **ppal, const DMC64Palette *cpal, const BOOL mixed)
+int dmC64PaletteFromC64Palette(DMPalette **ppal, const DMC64Palette *cpal, const bool mixed)
 {
     if (ppal == NULL || cpal == NULL)
         return DMERR_NULLPTR;
@@ -61,7 +61,7 @@
 }
 
 
-int dmC64SetImagePalette(DMImage *img, const DMC64ImageConvSpec *spec, const BOOL mixed)
+int dmC64SetImagePalette(DMImage *img, const DMC64ImageConvSpec *spec, const bool mixed)
 {
     if (img == NULL || spec == NULL)
         return DMERR_NULLPTR;
@@ -70,7 +70,7 @@
     if (!img->constpal)
         dmPaletteFree(img->pal);
 
-    img->constpal = FALSE;
+    img->constpal = false;
 
     // If specific palette is wanted, use it
     if (spec->pal != NULL)
@@ -87,7 +87,7 @@
 }
 
 
-BOOL dmCompareAddr16(const DMGrowBuf *buf, const size_t offs, const Uint16 addr)
+bool dmCompareAddr16(const DMGrowBuf *buf, const size_t offs, const Uint16 addr)
 {
     return
         offs + 1 < buf->len &&
@@ -225,7 +225,7 @@
 
 int dmC64ConvertCSDataToImage(DMImage *img,
     const int xoffs, const int yoffs, const Uint8 *buf,
-    const int width, const int height, const BOOL multicolor,
+    const int width, const int height, const bool multicolor,
     const int *colors)
 {
     int yc, widthpx = width * 8;
@@ -349,12 +349,12 @@
     if (src != NULL && (cfg->flags & DM_RLE_BACKWARDS_INPUT))
     {
         src->offs = src->len;
-        src->backwards = TRUE;
+        src->backwards = true;
     }
 
     if (dst != NULL && (cfg->flags & DM_RLE_BACKWARDS_OUTPUT))
     {
-        dst->backwards = TRUE;
+        dst->backwards = true;
         dst->offs = dst->size;
     }
 
@@ -566,7 +566,7 @@
 
 int dmEncodeGenericRLESequence(DMGrowBuf *dst, const Uint8 data, unsigned int count, const DMCompParams *cfg)
 {
-    BOOL copyOnly = FALSE;
+    bool copyOnly = false;
     int res;
 
     switch (cfg->type)
@@ -622,7 +622,7 @@
                 }
             }
             else
-                copyOnly = TRUE;
+                copyOnly = true;
             break;
 
         case DM_COMP_RLE_MASK:
@@ -635,7 +635,7 @@
                     goto out;
             }
             else
-                copyOnly = TRUE;
+                copyOnly = true;
             break;
     }
 
@@ -1075,7 +1075,7 @@
 }
 
 
-int dmC64EncodeGenericBMP(const BOOL allocate, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt)
+int dmC64EncodeGenericBMP(const bool allocate, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt)
 {
     DMC64EncDecCtx ctx;
     int res = DMERR_OK;
@@ -1481,7 +1481,7 @@
 int dmC64ConvertBMP2Image(DMImage **pdst, const DMC64Image *src, const DMC64ImageConvSpec *pspec)
 {
     DMC64ImageConvSpec spec;
-    BOOL mixed;
+    bool mixed;
     int res;
 
     if (pdst == NULL || src == NULL || pspec == NULL)
@@ -1533,7 +1533,7 @@
             return DMERR_OUT_OF_DATA;
 
         dmGrowBufConstCopyOffs(&tmp, buf, probeOffs);
-        if (dmC64ProbeBMP(&tmp, fmt) == DM_PROBE_SCORE_FALSE)
+        if (dmC64ProbeBMP(&tmp, fmt) == DM_PROBE_SCORE_false)
             return DMERR_NOT_SUPPORTED;
     }
 
@@ -1643,7 +1643,7 @@
     if (fmt->encode != NULL)
         res = fmt->encode(buf, img, fmt);
     else
-        res = dmC64EncodeGenericBMP(FALSE, buf, img, fmt);
+        res = dmC64EncodeGenericBMP(false, buf, img, fmt);
 
     if (res != DMERR_OK)
         goto out;
@@ -1673,12 +1673,12 @@
 // is found, pointer to format description is set to *pfmt.
 int dmC64ProbeBMP(const DMGrowBuf *buf, const DMC64ImageFormat **pfmt)
 {
-    int scoreMax = DM_PROBE_SCORE_FALSE, scoreIndex = -1;
+    int scoreMax = DM_PROBE_SCORE_false, scoreIndex = -1;
 
     for (int i = 0; i < ndmC64ImageFormats; i++)
     {
         const DMC64ImageFormat *fmt = &dmC64ImageFormats[i];
-        int score = DM_PROBE_SCORE_FALSE;
+        int score = DM_PROBE_SCORE_false;
         if (fmt->probe == NULL && fmt->size > 0 && fmt->addr > 0)
         {
             // Generic probe just checks matching size and load address
@@ -1702,11 +1702,11 @@
         return scoreMax;
     }
     else
-        return DM_PROBE_SCORE_FALSE;
+        return DM_PROBE_SCORE_false;
 }
 
 
-BOOL             dmLib64GFXInitialized = FALSE;
+bool             dmLib64GFXInitialized = false;
 DMC64ImageFormat **dmC64ImageFormatsSorted = NULL;
 
 
@@ -1730,7 +1730,7 @@
     if (dmLib64GFXInitialized)
         dmLib64GFXClose();
 
-    dmLib64GFXInitialized = TRUE;
+    dmLib64GFXInitialized = true;
 
     if ((dmC64ImageFormatsSorted = dmCalloc(ndmC64ImageFormats, sizeof(dmC64ImageFormatsSorted[0]))) == NULL)
         return DMERR_MALLOC;
@@ -1754,5 +1754,5 @@
 void dmLib64GFXClose(void)
 {
     dmFreeR(&dmC64ImageFormatsSorted);
-    dmLib64GFXInitialized = FALSE;
+    dmLib64GFXInitialized = false;
 }