From f74f7988ff40d875dcd15a0dfd0f7138ffa947a6 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Mon, 13 Nov 2023 12:29:10 +0200
Subject: [PATCH] MSDOS: implement valid location highlighting

... for VGA and VESA tiled map.
---
 sys/msdos/vidvesa.c | 18 ++++++++++++++----
 sys/msdos/vidvga.c  | 10 ++++++++++
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/sys/msdos/vidvesa.c b/sys/msdos/vidvesa.c
index a6afbc80f..461bc13fe 100644
--- a/sys/msdos/vidvesa.c
+++ b/sys/msdos/vidvesa.c
@@ -720,6 +720,16 @@ vesa_xputg(const glyph_info *glyphinfo, const glyph_info *bkglyphinfo UNUSED)
                 decal_packed(packcell, special);
 #endif
             vesa_DisplayCell(glyphinfo->gm.tileidx, col - clipx, ry - clipy);
+            if (bkglyphinfo->framecolor != NO_COLOR) {
+                int curtypbak = cursor_type;
+                int cclr = cursor_color;
+
+                cursor_type = CURSOR_FRAME;
+                cursor_color = bkglyphinfo->framecolor;
+                vesa_DrawCursor();
+                cursor_type = curtypbak;
+                cursor_color = cclr;
+            }
         }
     }
     if (col < (CO - 1))
@@ -2227,14 +2237,14 @@ vesa_DrawCursor(void)
 
     default:
         for (x = left; x <= right; ++x) {
-            vesa_WritePixel(x, top, FIRST_TEXT_COLOR + 15);
+            vesa_WritePixel(x, top, FIRST_TEXT_COLOR + cursor_color);
         }
         for (y = top + 1; y <= bottom - 1; ++y) {
-            vesa_WritePixel(left , y, FIRST_TEXT_COLOR + 15);
-            vesa_WritePixel(right, y, FIRST_TEXT_COLOR + 15);
+            vesa_WritePixel(left , y, FIRST_TEXT_COLOR + cursor_color);
+            vesa_WritePixel(right, y, FIRST_TEXT_COLOR + cursor_color);
         }
         for (x = left; x <= right; ++x) {
-            vesa_WritePixel(x, bottom, FIRST_TEXT_COLOR + 15);
+            vesa_WritePixel(x, bottom, FIRST_TEXT_COLOR + cursor_color);
         }
         break;
     }
diff --git a/sys/msdos/vidvga.c b/sys/msdos/vidvga.c
index c5e887703..8f9025aa6 100644
--- a/sys/msdos/vidvga.c
+++ b/sys/msdos/vidvga.c
@@ -415,6 +415,16 @@ vga_xputg(const glyph_info *glyphinfo,
             if (map[ry][col].special)
                 decal_planar(&planecell, special);
             vga_DisplayCell(&planecell, col - clipx, row);
+            if (bkglyphinfo->framecolor != NO_COLOR) {
+                int curtypbak = cursor_type;
+                int cclr = cursor_color;
+
+                cursor_type = CURSOR_FRAME;
+                cursor_color = bkglyphinfo->framecolor;
+                vga_DrawCursor();
+                cursor_type = curtypbak;
+                cursor_color = cclr;
+            }
         }
     } else {
         read_planar_tile_O(glyphnum, &planecell_O);