From fd387f3e998d49066782bf4d4285dedc012c8634 Mon Sep 17 00:00:00 2001
From: Shpoike <Shpoike@users.noreply.github.com>
Date: Sun, 14 Apr 2024 04:54:07 +0100
Subject: [PATCH] 'dir textures/*/*.wal' can now show previews.

---
 engine/client/image.c | 40 ++++++++++++++++++++++++++++++++++++++++
 engine/common/fs.c    |  3 ++-
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/engine/client/image.c b/engine/client/image.c
index 092cf2e72..9bebd8125 100644
--- a/engine/client/image.c
+++ b/engine/client/image.c
@@ -7516,6 +7516,46 @@ qbyte *ReadRawImageFile(qbyte *buf, int len, int *width, int *height, uploadfmt_
 	}
 #endif
 
+#ifdef Q2BSPS
+	if (len >= sizeof(q2miptex_t))	//.lmp has no magic id. guess at it.
+	{
+		const q2miptex_t *wal = (const q2miptex_t *)buf;
+		size_t w = LittleLong(wal->width), h = LittleLong(wal->height);
+		size_t sz = sizeof(*wal) +
+					(w>>0)*(h>>0) +
+					(w>>1)*(h>>1) +
+					(w>>2)*(h>>2) +
+					(w>>3)*(h>>3);
+		if (sz == len)
+		{
+			if (force_rgba8)
+			{
+				qboolean foundalpha = false;
+				qbyte *in = buf+sizeof(*wal);
+				data = BZ_Malloc(w * h * sizeof(int));
+				for (i = 0; i < w * h; i++)
+				{
+//					if (in[i] == 255)
+//						foundalpha = true;
+					((unsigned int*)data)[i] = d_8to24rgbtable[in[i]];
+				}
+				*width = w;
+				*height = h;
+				*format = foundalpha?PTI_RGBA8:PTI_RGBX8;
+			}
+			else
+			{
+				data = BZ_Malloc(w * h);
+				memcpy(data, buf+sizeof(*wal), w*h);
+				*width = w;
+				*height = h;
+				*format = TF_SOLID8;
+			}
+			return data;
+		}
+	}
+#endif
+
 	TRACE(("dbg: Read32BitImageFile: life sucks\n"));
 
 	return NULL;
diff --git a/engine/common/fs.c b/engine/common/fs.c
index 95b4f8952..e11ec8c46 100644
--- a/engine/common/fs.c
+++ b/engine/common/fs.c
@@ -1585,7 +1585,8 @@ static int QDECL COM_Dir_List(const char *name, qofs_t size, time_t mtime, void
 		else if (!Q_strcasecmp(ext, "tga") || !Q_strcasecmp(ext, "png") || !Q_strcasecmp(ext, "jpg") || !Q_strcasecmp(ext, "jpeg")|| !Q_strcasecmp(ext, "lmp") || !Q_strcasecmp(ext, "ico") ||
 				 !Q_strcasecmp(ext, "pcx") || !Q_strcasecmp(ext, "bmp") || !Q_strcasecmp(ext, "dds") || !Q_strcasecmp(ext, "ktx") || !Q_strcasecmp(ext, "ktx2")|| !Q_strcasecmp(ext, "vtf") ||
 				 !Q_strcasecmp(ext, "astc")|| !Q_strcasecmp(ext, "htga")|| !Q_strcasecmp(ext, "exr") || !Q_strcasecmp(ext, "xcf") || !Q_strcasecmp(ext, "psd") || !Q_strcasecmp(ext, "iwi") ||
-				 !Q_strcasecmp(ext, "pbm") || !Q_strcasecmp(ext, "ppm") || !Q_strcasecmp(ext, "pgm") || !Q_strcasecmp(ext, "pam") || !Q_strcasecmp(ext, "pfm") || !Q_strcasecmp(ext, "hdr") )
+				 !Q_strcasecmp(ext, "pbm") || !Q_strcasecmp(ext, "ppm") || !Q_strcasecmp(ext, "pgm") || !Q_strcasecmp(ext, "pam") || !Q_strcasecmp(ext, "pfm") || !Q_strcasecmp(ext, "hdr") ||
+				 !Q_strcasecmp(ext, "wal") )
 		{
 			//FIXME: image replacements are getting in the way here.
 			Q_snprintfz(link, sizeof(link), "\\tiprawimg\\%s\\tip\\(note: image replacement rules are context-dependant, including base path, sub path, extension, or complete replacement via a shader)", name);