From 504c2eb1c5ac88d4f7fa417e3603260a50a4c9f9 Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Wed, 22 May 2024 23:23:27 +0200
Subject: [PATCH] add new setting to fake current display mode

---
 inc/config.h |  2 +-
 src/config.c |  5 +++--
 src/dd.c     | 57 +++++++++++++++++++++++++++++++++++-----------------
 3 files changed, 43 insertions(+), 21 deletions(-)

diff --git a/inc/config.h b/inc/config.h
index ec737eb..33b5b7c 100644
--- a/inc/config.h
+++ b/inc/config.h
@@ -76,6 +76,7 @@ typedef struct CNCDDRAWCONFIG
     int min_font_size;
     BOOL direct3d_passthrough;
     BOOL center_cursor_fix;
+    char fake_mode[128];
 
     /* Hotkeys */
 
@@ -97,7 +98,6 @@ typedef struct CNCDDRAWCONFIG
     BOOL infantryhack;
     BOOL stronghold_hack;
     BOOL mgs_hack;
-    BOOL vermeer_hack;
 
 } CNCDDRAWCONFIG;
 
diff --git a/src/config.c b/src/config.c
index a45fc9d..93c0c67 100644
--- a/src/config.c
+++ b/src/config.c
@@ -89,6 +89,7 @@ void cfg_load()
     GET_INT(g_config.min_font_size, "min_font_size", 0);
     GET_BOOL(g_config.direct3d_passthrough, "direct3d_passthrough", FALSE);
     GET_BOOL(g_config.center_cursor_fix, "center_cursor_fix", FALSE);
+    GET_STRING("fake_mode", "", g_config.fake_mode, sizeof(g_config.fake_mode));
 
     /* Hotkeys */
 
@@ -107,7 +108,6 @@ void cfg_load()
     GET_BOOL(g_config.infantryhack, "infantryhack", FALSE);
     GET_BOOL(g_config.stronghold_hack, "stronghold_hack", FALSE);
     GET_BOOL(g_config.mgs_hack, "mgs_hack", FALSE);
-    GET_BOOL(g_config.vermeer_hack, "vermeer_hack", FALSE);
 
     GameHandlesClose = GameHandlesClose || g_config.infantryhack;
 
@@ -302,6 +302,7 @@ static void cfg_create_ini()
             "min_font_size=0\n"
             "direct3d_passthrough=false\n"
             "center_cursor_fix=false\n"
+            ";fake_mode=640x480x32\n"
             "\n"
             "\n"
             "\n"
@@ -1055,7 +1056,7 @@ static void cfg_create_ini()
             "; Vermeer\n"
             "[vermeer]\n"
             "adjmouse=true\n"
-            "vermeer_hack=true\n"
+            "fake_mode=640x480x32\n"
             "\n"
             "; Wizardry 8\n"
             "[Wiz8]\n"
diff --git a/src/dd.c b/src/dd.c
index c183ecc..a305890 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -476,41 +476,56 @@ HRESULT dd_GetDisplayMode(LPDDSURFACEDESC lpDDSurfaceDesc)
 
         memset(lpDDSurfaceDesc, 0, size);
 
+        unsigned long width = 1024;
+        unsigned long height = 768;
+        unsigned long bpp = 16;
+
+        if (g_ddraw.width)
+        {
+            width = g_ddraw.width;
+            height = g_ddraw.height;
+            bpp = g_ddraw.bpp;
+        }
+        else if (g_config.fake_mode[0])
+        {
+            char* e = &g_config.fake_mode[0];
+
+            width = strtoul(e, &e, 0);
+            height = strtoul(e + 1, &e, 0);
+            bpp = strtoul(e + 1, &e, 0);
+        }
+
         lpDDSurfaceDesc->ddpfPixelFormat.dwSize = sizeof(DDPIXELFORMAT);
-        lpDDSurfaceDesc->ddpfPixelFormat.dwFlags = DDPF_PALETTEINDEXED8 | DDPF_RGB;
-        lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount = 8;
+        lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount = bpp;
 
         lpDDSurfaceDesc->dwSize = size;
         lpDDSurfaceDesc->dwFlags = DDSD_HEIGHT | DDSD_REFRESHRATE | DDSD_WIDTH | DDSD_PITCH | DDSD_PIXELFORMAT;
         lpDDSurfaceDesc->dwRefreshRate = 60;
-        lpDDSurfaceDesc->dwHeight = g_ddraw.height ? g_ddraw.height : 768;
-        lpDDSurfaceDesc->dwWidth = g_ddraw.width ? g_ddraw.width : 1024;
+        lpDDSurfaceDesc->dwWidth = width;
+        lpDDSurfaceDesc->dwHeight = height;
 
-        lpDDSurfaceDesc->lPitch = 
-            ((lpDDSurfaceDesc->dwWidth * lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount + 63) & ~63) >> 3;
-
-        if (g_ddraw.bpp == 32 || g_config.vermeer_hack)
+        if (bpp == 32)
         {
             lpDDSurfaceDesc->ddpfPixelFormat.dwFlags = DDPF_RGB;
-            lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount = 32;
             lpDDSurfaceDesc->ddpfPixelFormat.dwRBitMask = 0xFF0000;
             lpDDSurfaceDesc->ddpfPixelFormat.dwGBitMask = 0x00FF00;
             lpDDSurfaceDesc->ddpfPixelFormat.dwBBitMask = 0x0000FF;
-
-            lpDDSurfaceDesc->lPitch =
-                ((lpDDSurfaceDesc->dwWidth * lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount + 63) & ~63) >> 3;
         }
-        else if (g_ddraw.bpp != 8)
+        else if (bpp == 8)
+        {
+            lpDDSurfaceDesc->ddpfPixelFormat.dwFlags = DDPF_PALETTEINDEXED8 | DDPF_RGB;
+        }
+        else
         {
             lpDDSurfaceDesc->ddpfPixelFormat.dwFlags = DDPF_RGB;
             lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount = 16;
             lpDDSurfaceDesc->ddpfPixelFormat.dwRBitMask = 0xF800;
             lpDDSurfaceDesc->ddpfPixelFormat.dwGBitMask = 0x07E0;
             lpDDSurfaceDesc->ddpfPixelFormat.dwBBitMask = 0x001F;
-
-            lpDDSurfaceDesc->lPitch =
-                ((lpDDSurfaceDesc->dwWidth * lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount + 63) & ~63) >> 3;
         }
+
+        lpDDSurfaceDesc->lPitch = 
+            ((lpDDSurfaceDesc->dwWidth * lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount + 63) & ~63) >> 3;
     }
 
     return DD_OK;
@@ -1298,9 +1313,15 @@ HRESULT dd_SetCooperativeLevel(HWND hwnd, DWORD dwFlags)
 
     if (dwFlags & DDSCL_NORMAL)
     {
-        if (g_config.vermeer_hack)
+        if (g_config.fake_mode[0])
         {
-            dd_SetDisplayMode(640, 480, 16, 0);
+            char* e = &g_config.fake_mode[0];
+
+            unsigned long width = strtoul(e, &e, 0);
+            unsigned long height = strtoul(e + 1, &e, 0);
+            unsigned long bpp = strtoul(e + 1, &e, 0);
+
+            dd_SetDisplayMode(width, height, bpp, 0);
         }
     }