Change: Provide road and rail overlay sprites for bridge decks. (#14557)

This allows bridges designed primarily with NewGRF railtypes and roadtypes to be at least somewhat compatible with built-in rail and road.

media/baseset/openttd.grf.hash

@@ -1 +1 @@
-eb8390a0569e66ec417c64ad254f9d05
+b779126d7cd1567eb09a0a7871f70a71

media/baseset/openttd/CMakeLists.txt

@@ -10,6 +10,7 @@ if(GRFCODEC_FOUND)
                          ${CMAKE_CURRENT_SOURCE_DIR}/airport_preview.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/aqueduct.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/autorail.nfo
+                         ${CMAKE_CURRENT_SOURCE_DIR}/bridge_decks.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/canals.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/chars.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/elrails.nfo
@@ -31,6 +32,7 @@ if(GRFCODEC_FOUND)
                          ${CMAKE_CURRENT_SOURCE_DIR}/airport_preview.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/aqueduct.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/autorail.png
+                         ${CMAKE_CURRENT_SOURCE_DIR}/bridge_decks.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/canals.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/canal_locks.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/chars.png

media/baseset/openttd/bridge_decks.nfo

@@ -0,0 +1,36 @@
+// This file is part of OpenTTD.
+// OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+// OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+//
+   -1 * 0	 0C "Bridge decks"
+   -1 * 3	 05 1B 18
+
+   -1 sprites/bridge_decks.png 8bpp   96  16  64  31 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp   16  16  64  31 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  176  16  64  39 -31   -8 normal
+   -1 sprites/bridge_decks.png 8bpp  256  16  64  23 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  336  16  64  23 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  416  16  64  39 -31   -8 normal
+
+   -1 sprites/bridge_decks.png 8bpp   96  71  64  31 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp   16  71  64  31 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  176  71  64  39 -31   -8 normal
+   -1 sprites/bridge_decks.png 8bpp  256  71  64  23 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  336  71  64  23 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  416  71  64  39 -31   -8 normal
+
+   -1 sprites/bridge_decks.png 8bpp   96 126  64  31 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp   16 126  64  31 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  176 126  64  39 -31   -8 normal
+   -1 sprites/bridge_decks.png 8bpp  256 126  64  23 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  336 126  64  23 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  416 126  64  39 -31   -8 normal
+
+// X and Y axis are swapped for road surface.
+   -1 sprites/bridge_decks.png 8bpp   16 181  64  31 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp   96 181  64  31 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  176 181  64  39 -31   -8 normal
+   -1 sprites/bridge_decks.png 8bpp  256 181  64  23 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  336 181  64  23 -31    0 normal
+   -1 sprites/bridge_decks.png 8bpp  416 181  64  39 -31   -8 normal

media/baseset/openttd/openttd.nfo

@@ -100,3 +100,4 @@
 #include "palette.nfo"
 #include "road_waypoints.nfo"
 #include "overlay_rocks.nfo"
+#include "bridge_decks.nfo"