From 60d0102d7e63f8beb98fed2ab268ac054bee671f Mon Sep 17 00:00:00 2001
From: NepDisk <16447892+NepDisk@users.noreply.github.com>
Date: Mon, 29 Jul 2024 15:41:51 -0400
Subject: [PATCH] Revert "Stuff for Ivo's texture crunching"

This reverts commit 559222f9915f9a2be7615641ddb309f51368a605.
---
 src/p_setup.c    | 60 +++++++++++++++++++++++++++++++++++++-----------
 src/r_textures.c |  2 +-
 src/r_textures.h |  2 --
 3 files changed, 48 insertions(+), 16 deletions(-)

diff --git a/src/p_setup.c b/src/p_setup.c
index 8a14b5692..66010552d 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -607,23 +607,57 @@ Ploadflat (levelflat_t *levelflat, const char *flatname, boolean resize)
 	strlcpy(levelflat->name, flatname, sizeof (levelflat->name));
 	strupr(levelflat->name);
 
-	if (( texturenum = R_CheckTextureNumForName(levelflat->name) ) == -1)
+	/* If we can't find a flat, try looking for a texture! */
+	if (( flatnum = R_GetFlatNumForName(levelflat->name) ) == LUMPERROR)
 	{
-		// check for missing texture
-		if (( texturenum = R_CheckTextureNumForName(MISSING_TEXTURE) ) != -1)
-			goto texturefound;
-
-		// nevermind
-		levelflat->type = LEVELFLAT_NONE;
+		if (( texturenum = R_CheckTextureNumForName(levelflat->name) ) == -1)
+		{
+			// check for REDWALL
+			if (( texturenum = R_CheckTextureNumForName("REDWALL") ) != -1)
+				goto texturefound;
+			// check for REDFLR
+			else if (( flatnum = R_GetFlatNumForName("REDFLR") ) != LUMPERROR)
+				goto flatfound;
+			// nevermind
+			levelflat->type = LEVELFLAT_NONE;
+		}
+		else
+		{
+texturefound:
+			levelflat->type = LEVELFLAT_TEXTURE;
+			levelflat->u.texture.    num = texturenum;
+			levelflat->u.texture.lastnum = texturenum;
+			/* start out unanimated */
+			levelflat->u.texture.basenum = -1;
+		}
 	}
 	else
 	{
-texturefound:
-		levelflat->type = LEVELFLAT_TEXTURE;
-		levelflat->u.texture.    num = texturenum;
-		levelflat->u.texture.lastnum = texturenum;
-		/* start out unanimated */
-		levelflat->u.texture.basenum = -1;
+flatfound:
+		/* This could be a flat, patch, or PNG. */
+		flatpatch = W_CacheLumpNum(flatnum, PU_CACHE);
+		lumplength = W_LumpLength(flatnum);
+		if (Picture_CheckIfDoomPatch((softwarepatch_t *)flatpatch, lumplength))
+			levelflat->type = LEVELFLAT_PATCH;
+		else
+		{
+#ifndef NO_PNG_LUMPS
+			/*
+			Only need eight bytes for PNG headers.
+			FIXME: Put this elsewhere.
+			*/
+			W_ReadLumpHeader(flatnum, buffer, 8, 0);
+			if (Picture_IsLumpPNG(buffer, lumplength))
+				levelflat->type = LEVELFLAT_PNG;
+			else
+#endif/*NO_PNG_LUMPS*/
+				levelflat->type = LEVELFLAT_FLAT;/* phew */
+		}
+		if (flatpatch)
+			Z_Free(flatpatch);
+
+		levelflat->u.flat.    lumpnum = flatnum;
+		levelflat->u.flat.baselumpnum = LUMPERROR;
 	}
 
 	levelflat->terrain =
diff --git a/src/r_textures.c b/src/r_textures.c
index 39976a3c8..d04935b3e 100644
--- a/src/r_textures.c
+++ b/src/r_textures.c
@@ -1712,7 +1712,7 @@ INT32 R_TextureNumForName(const char *name)
 		static INT32 redwall = -2;
 		CONS_Debug(DBG_SETUP, "WARNING: R_TextureNumForName: %.8s not found\n", name);
 		if (redwall == -2)
-			redwall = R_CheckTextureNumForName(MISSING_TEXTURE);
+			redwall = R_CheckTextureNumForName("REDWALL");
 		if (redwall != -1)
 			return redwall;
 		return 1;
diff --git a/src/r_textures.h b/src/r_textures.h
index d4c9302e5..007da38ac 100644
--- a/src/r_textures.h
+++ b/src/r_textures.h
@@ -23,8 +23,6 @@
 #pragma interface
 #endif
 
-#define MISSING_TEXTURE "AASMELLY" // Replacement for invalid textures
-
 // A single patch from a texture definition,
 //  basically a rectangular area within
 //  the texture rectangle.