When selecting a list the detail texture (if any) is used when compar…

…ing against the primitive to be written. This makes primitives with the same texture to be seen as unique if they have different detail textures and thus they will be added to separate lists (needed for the new debug rendering mode "rend-tex = 2").

doomsday/engine/portable/include/gl_texmanager.h

@@ -141,6 +141,7 @@ DGLuint         GL_LoadGraphics2(resourceclass_t resClass, const char *name,
                                  gfxmode_t mode, int useMipmap, boolean clamped);
 DGLuint         GL_GetTextureInfo(int index);
 DGLuint         GL_GetTextureInfo2(int index, boolean translate);
+DGLuint         GL_GetFlatInfo(int idx, boolean translate);
 DGLuint         GL_PrepareTexture(int idx);
 DGLuint         GL_PrepareTexture2(int idx, boolean translate);
 DGLuint         GL_PrepareFlat(int idx);

doomsday/engine/portable/src/gl_texmanager.c

@@ -1346,10 +1346,7 @@ unsigned int GL_PrepareFlat2(int idx, boolean translate)
         // The flat isn't yet bound with OpenGL.
         lumptexinfo[flat->lump].tex[0] = GL_BindTexFlat(flat);
     }
-    texw = texh = 64;
-    texmask = false;
-    texdetail = (r_detail && flat->detail.tex ? &flat->detail : 0);
-    return lumptexinfo[flat->lump].tex[0];
+    return GL_GetFlatInfo(idx, translate);
 }
 
 /*
@@ -2984,6 +2981,29 @@ DGLuint GL_GetTextureInfo2(int index, boolean translate)
     return tex->tex;
 }
 
+/*
+ * Returns the flat name, if it has been prepared.
+ */
+DGLuint GL_GetFlatInfo(int idx, boolean translate)
+{
+    flat_t *flat = R_GetFlat(idx);
+
+    if(!flat)
+        return 0;
+
+    // Translate the flat.
+    if(translate && flat->translation.current != idx)
+    {
+        flat = R_GetFlat(flat->translation.current);
+    }
+
+    // Set the global texture info variables.
+    texw = texh = 64;
+    texmask = false;
+    texdetail = (r_detail && flat->detail.tex ? &flat->detail : 0);
+    return lumptexinfo[flat->lump].tex[0];
+}
+
 /**
  * Copy the averaged texture color into the dest buffer <code>rgb</code>.
  *