From 2d6ffe081e7c9f161e7414179bbaada40ef7f057 Mon Sep 17 00:00:00 2001
From: Cacodemon345 <wahil1976@outlook.com>
Date: Thu, 21 Dec 2023 14:40:32 +0600
Subject: [PATCH] Matrox Mystique: Force window resizing

---
 src/video/vid_mga.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/video/vid_mga.c b/src/video/vid_mga.c
index 498f2ff9c..de6b1594f 100644
--- a/src/video/vid_mga.c
+++ b/src/video/vid_mga.c
@@ -717,10 +717,12 @@ mystique_out(uint16_t addr, uint8_t val, void *priv)
             mystique->crtcext_idx = val;
             break;
         case 0x3df:
-            if (mystique->crtcext_idx < 6)
-                mystique->crtcext_regs[mystique->crtcext_idx] = val;
             if (mystique->crtcext_idx == 1)
                 svga->dpms = !!(val & 0x30);
+            if (mystique->crtcext_idx < 6) {
+                mystique->crtcext_regs[mystique->crtcext_idx] = val;
+                svga_recalctimings(&mystique->svga);
+            }
             if (mystique->crtcext_idx == 4) {
                 if (svga->gdcreg[6] & 0xc) {
                     /*64k banks*/
@@ -952,6 +954,8 @@ mystique_recalctimings(svga_t *svga)
 
     svga->fb_only       = svga->packed_chain4;
     svga->disable_blink = (svga->bpp > 4);
+    reset_screen_size();
+    video_force_resize_set_monitor(1, svga->monitor_index);
 #if 0
     pclog("PackedChain4=%d, chain4=%x, fast=%x, bit6 attrreg10=%02x, bits 5-6 gdcreg5=%02x, extmode=%02x.\n", svga->packed_chain4, svga->chain4, svga->fast, svga->attrregs[0x10] & 0x40, svga->gdcreg[5] & 0x60, mystique->pci_regs[0x41] & 1, mystique->crtcext_regs[3] & CRTCX_R3_MGAMODE);
 #endif