Add Rock Tileset, Update Rock-related Sprites, and Update Signs (#2960)

This request is focused on adding to the game a new rock-themed tileset, but has many extra features and tweaks. 

New features:
- Conversion file to turn the addon rock tiles into vanilla rock tiles
- Updated sprites for the carryable rock object along an extra 3x3 size for it
- Blocky rock tiles similar to the rock sprites
- Platforms and falling platforms sprites updated with current in-game tiles
- New sprites for falling platforms made from the rock tileset
- Redesigned rock sign and all other signs as well
- Normal, Wall and Hanging sign bases added as tiles
- Transparent sign icons as decals to use with the bases
- Snow, Forest and Corrupted overlay decals for signs

Tweaks:
- Weak and Unstable tiles (hay, ice, crumbling stone, thin ice and skulls) added to the "Bonus+Block" tilegroup
- Removed the duplicated 2x2 crystal tiles in the tilegroup
- Filled the empty gaps on the ice cave slopes in the tilegroup

Todo list:
- [x] Add the jagged rock tile images
- [x] Update rock object sprites
- [x] Add rock platform sprites for the falling platforms
- [x] Update the old platform sprites to fit the new game style
- [x] Update the .strf and .satc files with the new tile IDs
- [x] Rearrange tile IDs so they don't conflict with #2894 
- [x] Add a conversion file to turn the addon rock tiles into vanilla rock tiles
- [x] Add rock block tiles and 3x3 carryable rock
- [x] Add weak and unstable tiles as actual tiles
- [x] Update sign designs
- [x] Add wall and hanging sign variants

data/images/autotiles.satc

@@ -6107,4 +6107,185 @@
       (mask "11111*0*")
     )
   )
+
+  (autotileset
+    (name "jrock_a")
+    (default 7317)
+
+  ;; CENTER
+    (autotile
+      (id 7317)
+      (alt-id
+        (id 7324)
+        (weight 0.5)
+      )
+      (solid #t)
+      (mask "***11111")
+    )
+
+  ;; LEFT
+  (autotile
+      (id 7316)
+      (solid #t)
+      (mask "***01011")
+    )
+
+  ;; RIGHT
+  (autotile
+      (id 7318)
+      (solid #t)
+      (mask "***10110")
+    )
+
+  ;; THIN
+  (autotile
+      (id 7319)
+      (solid #t)
+      (mask "***00010")
+    )
+
+  ;; B LEFT
+  (autotile
+      (id 7320)
+      (solid #t)
+      (mask "***01*0*")
+    )
+
+  ;; B CENTER
+  (autotile
+      (id 7321)
+      (solid #t)
+      (mask "***11*0*")
+    )
+
+  ;; B RIGHT
+  (autotile
+      (id 7322)
+      (solid #t)
+      (mask "***10*0*")
+    )
+
+  ;; B THIN
+  (autotile
+      (id 7323)
+      (solid #t)
+      (mask "***00*0*")
+    )
+
+  ;; CORNER TL
+  (autotile
+      (id 7325)
+      (solid #t)
+      (mask "***11110")
+    )
+
+  ;; CORNER TR
+  (autotile
+      (id 7326)
+      (solid #t)
+      (mask "***11011")
+    )
+
+  ;; CORNER BL
+  (autotile
+      (id 7327)
+      (solid #t)
+      (mask "***10111")
+    )
+
+  ;; CORNER BR
+  (autotile
+      (id 7328)
+      (solid #t)
+      (mask "***01111")
+    )
+
+  ;; CORNER THIN TL
+  (autotile
+      (id 7329)
+      (solid #t)
+      (mask "***01010")
+    )
+
+  ;; CORNER THIN TR
+  (autotile
+      (id 7330)
+      (solid #t)
+      (mask "***10010")
+    )
+
+  ;; CORNER THIN TC
+  (autotile
+      (id 7331)
+      (solid #t)
+      (mask "***11010")
+    )
+
+  ;; CORNER THIN BL
+  (autotile
+      (id 7332)
+      (solid #t)
+      (mask "***00011")
+    )
+
+  ;; CORNER THIN BR
+  (autotile
+      (id 7333)
+      (solid #t)
+      (mask "***00110")
+    )
+
+  ;; CORNER THIN BC
+  (autotile
+      (id 7334)
+      (solid #t)
+      (mask "***00111")
+    )
+
+  ;; CORNER "S"
+  (autotile
+      (id 7335)
+      (solid #t)
+      (mask "***01110")
+    )
+
+  ;; CORNER "Z"
+  (autotile
+      (id 7336)
+      (solid #t)
+      (mask "***10011")
+    )
+
+  ;; DECO TILES -----------
+
+  ;; DECO LEFT
+  (autotile
+      (id 7312)
+      (solid #f)
+      (mask "*****011")
+    )
+
+  ;; DECO CENTER
+  (autotile
+      (id 7313)
+      (solid #f)
+      (mask "*****111")
+    )
+
+  ;; DECO RIGHT
+  (autotile
+      (id 7314)
+      (solid #f)
+      (mask "*****110")
+    )
+
+  ;; DECO THIN
+  (autotile
+      (id 7315)
+      (solid #f)
+      (mask "*****010")
+    )
+
+  )
+
 )

data/images/converters/data.stcd

@@ -1,12 +1,17 @@
-(supertux-converter-data
-  (nightly_all_tiles.sttc
-    (title (_ "Nightly Tiles"))
-    (author "SuperTux Team")
-    (description (_ "For levels, created in previous Nightly builds."))
-  )
-  (pre-0.6.3_crystal_tiles.sttc
-    (title (_ "Pre-0.6.3 Crystal Tiles"))
-    (author "tylerandari12")
-    (description (_ "For levels, created in pre-0.6.3 versions, which use crystal tiles."))
-  )
-)
+(supertux-converter-data
+  (nightly_all_tiles.sttc
+    (title (_ "Nightly Tiles"))
+    (author "SuperTux Team")
+    (description (_ "For levels, created in previous Nightly builds."))
+  )
+  (pre-0.6.3_crystal_tiles.sttc
+    (title (_ "Pre-0.6.3 Crystal Tiles"))
+    (author "tylerandari12")
+    (description (_ "For levels, created in pre-0.6.3 versions, which use crystal tiles."))
+  )
+  (rock_tiles_addon_to_vanilla.sttc
+    (title (_ "Jagged Rock Tiles from Addon"))
+    (author "Eauix")
+    (description (_ "For levels, created with the rock tiles addon, converts their IDs to vanilla rock tile IDs"))
+  )
+)

data/images/converters/rock_tiles_addon_to_vanilla.sttc

@@ -0,0 +1,82 @@
+56001 -> 7312
+56002 -> 7313
+56003 -> 7314
+56004 -> 7315
+56005 -> 7316
+56006 -> 7317
+56007 -> 7318
+56008 -> 7319
+56009 -> 7320
+56010 -> 7321
+56011 -> 7322
+56012 -> 7323
+56013 -> 7324
+56014 -> 7325
+56015 -> 7326
+56016 -> 7327
+56017 -> 7328
+56018 -> 7329
+56019 -> 7330
+56020 -> 7331
+56021 -> 7332
+56022 -> 7333
+56023 -> 7334
+56024 -> 7335
+56025 -> 7336
+56026 -> 7337
+56027 -> 7338
+56028 -> 7339
+56029 -> 7340
+56030 -> 7341
+56031 -> 7342
+56032 -> 7343
+56033 -> 7344
+56034 -> 7345
+56035 -> 7346
+56036 -> 7347
+56037 -> 7348
+56038 -> 7349
+56039 -> 7350
+56040 -> 7351
+56041 -> 7352
+56042 -> 7353
+56043 -> 7354
+56044 -> 7355
+56045 -> 7356
+56046 -> 7357
+56047 -> 7358
+56048 -> 7359
+56049 -> 7360
+56050 -> 7361
+56051 -> 7362
+56052 -> 7363
+56053 -> 7364
+56054 -> 7365
+56055 -> 7366
+56056 -> 7367
+56057 -> 7368
+56058 -> 7369
+56059 -> 7370
+56060 -> 7371
+56061 -> 7372
+56062 -> 7373
+56063 -> 7374
+56064 -> 7375
+56065 -> 7376
+56066 -> 7377
+56067 -> 7378
+56068 -> 7379
+56069 -> 7380
+56070 -> 7381
+56071 -> 7382
+56072 -> 7383
+56073 -> 7384
+56074 -> 7385
+56075 -> 7386
+56076 -> 7387
+56077 -> 7388
+56078 -> 7389
+56079 -> 7390
+56080 -> 7391
+56081 -> 7392
+56082 -> 7393

data/images/objects/fallblock/rockblock-0.5x0.5.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 16 16)
+    (images "rockblock-0.5x0.5.png")
+  )
+)

data/images/objects/fallblock/rockblock-1x1.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 32 32)
+    (images "rockblock-1x1.png")
+  )
+)

data/images/objects/fallblock/rockblock-1x2.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 32 64)
+    (images "rockblock-1x2.png")
+  )
+)

data/images/objects/fallblock/rockblock-1x3.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 32 96)
+    (images "rockblock-1x3.png")
+  )
+)

data/images/objects/fallblock/rockblock-2x1.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 64 32)
+    (images "rockblock-2x1.png")
+  )
+)

data/images/objects/fallblock/rockblock-2x2.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 64 64)
+    (images "rockblock-2x2.png")
+  )
+)

data/images/objects/fallblock/rockblock-2x3.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 64 96)
+    (images "rockblock-2x3.png")
+  )
+)

data/images/objects/fallblock/rockblock-3x1.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 96 32)
+    (images "rockblock-3x1.png")
+  )
+)

data/images/objects/fallblock/rockblock-3x2.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 96 64)
+    (images "rockblock-3x2.png")
+  )
+)

data/images/objects/fallblock/rockblock-3x3.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 0 0 96 96)
+    (images "rockblock-3x3.png")
+  )
+)

data/images/objects/fallblock/rockplatform-0.5x0.5.sprite

@@ -0,0 +1,7 @@
+(supertux-sprite
+  (action
+    (name "normal")
+    (hitbox 8 8 16 16)
+    (images "rockplatform-0.5x0.5.png")
+  )
+)