Feature: Show rainforest under vegetation on small map

src/gfx_func.h

@@ -227,6 +227,7 @@ static const uint8 PC_LIGHT_BLUE         = 0x98;           ///< Light blue palet
 static const uint8 PC_ROUGH_LAND         = 0x52;           ///< Dark green palette colour for rough land.
 static const uint8 PC_GRASS_LAND         = 0x54;           ///< Dark green palette colour for grass land.
 static const uint8 PC_BARE_LAND          = 0x37;           ///< Brown palette colour for bare land.
+static const uint8 PC_RAINFOREST         = 0x5C;           ///< Pale green palette colour for rainforest.
 static const uint8 PC_FIELDS             = 0x25;           ///< Light brown palette colour for fields.
 static const uint8 PC_TREES              = 0x57;           ///< Green palette colour for trees.
 static const uint8 PC_WATER              = 0xC9;           ///< Dark blue palette colour for water.

src/lang/english.txt

@@ -747,6 +747,7 @@ STR_SMALLMAP_LEGENDA_DOCK                                       :{TINY_FONT}{BLA
 STR_SMALLMAP_LEGENDA_ROUGH_LAND                                 :{TINY_FONT}{BLACK}Rough Land
 STR_SMALLMAP_LEGENDA_GRASS_LAND                                 :{TINY_FONT}{BLACK}Grass Land
 STR_SMALLMAP_LEGENDA_BARE_LAND                                  :{TINY_FONT}{BLACK}Bare Land
+STR_SMALLMAP_LEGENDA_RAINFOREST                                 :{TINY_FONT}{BLACK}Rainforest
 STR_SMALLMAP_LEGENDA_FIELDS                                     :{TINY_FONT}{BLACK}Fields
 STR_SMALLMAP_LEGENDA_TREES                                      :{TINY_FONT}{BLACK}Trees
 STR_SMALLMAP_LEGENDA_ROCKS                                      :{TINY_FONT}{BLACK}Rocks

src/smallmap_gui.cpp

@@ -115,11 +115,12 @@ static const LegendAndColour _legend_vegetation[] = {
 	MK(PC_ROUGH_LAND,      STR_SMALLMAP_LEGENDA_ROUGH_LAND),
 	MK(PC_GRASS_LAND,      STR_SMALLMAP_LEGENDA_GRASS_LAND),
 	MK(PC_BARE_LAND,       STR_SMALLMAP_LEGENDA_BARE_LAND),
+	MK(PC_RAINFOREST,      STR_SMALLMAP_LEGENDA_RAINFOREST),
 	MK(PC_FIELDS,          STR_SMALLMAP_LEGENDA_FIELDS),
 	MK(PC_TREES,           STR_SMALLMAP_LEGENDA_TREES),
-	MK(PC_GREEN,           STR_SMALLMAP_LEGENDA_FOREST),
 
-	MS(PC_GREY,            STR_SMALLMAP_LEGENDA_ROCKS),
+	MS(PC_GREEN,           STR_SMALLMAP_LEGENDA_FOREST),
+	MK(PC_GREY,            STR_SMALLMAP_LEGENDA_ROCKS),
 	MK(PC_ORANGE,          STR_SMALLMAP_LEGENDA_DESERT),
 	MK(PC_LIGHT_BLUE,      STR_SMALLMAP_LEGENDA_SNOW),
 	MK(PC_BLACK,           STR_SMALLMAP_LEGENDA_TRANSPORT_ROUTES),
@@ -531,7 +532,11 @@ static inline uint32 GetSmallMapVegetationPixels(TileIndex tile, TileType t)
 {
 	switch (t) {
 		case MP_CLEAR:
-			return (IsClearGround(tile, CLEAR_GRASS) && GetClearDensity(tile) < 3) ? MKCOLOUR_XXXX(PC_BARE_LAND) : _vegetation_clear_bits[GetClearGround(tile)];
+			if (IsClearGround(tile, CLEAR_GRASS)) {
+				if (GetClearDensity(tile) < 3) return MKCOLOUR_XXXX(PC_BARE_LAND);
+				if (GetTropicZone(tile) == TROPICZONE_RAINFOREST) return MKCOLOUR_XXXX(PC_RAINFOREST);
+			}
+			return _vegetation_clear_bits[GetClearGround(tile)];
 
 		case MP_INDUSTRY:
 			return IsTileForestIndustry(tile) ? MKCOLOUR_XXXX(PC_GREEN) : MKCOLOUR_XXXX(PC_DARK_RED);
@@ -540,7 +545,7 @@ static inline uint32 GetSmallMapVegetationPixels(TileIndex tile, TileType t)
 			if (GetTreeGround(tile) == TREE_GROUND_SNOW_DESERT || GetTreeGround(tile) == TREE_GROUND_ROUGH_SNOW) {
 				return (_settings_game.game_creation.landscape == LT_ARCTIC) ? MKCOLOUR_XYYX(PC_LIGHT_BLUE, PC_TREES) : MKCOLOUR_XYYX(PC_ORANGE, PC_TREES);
 			}
-			return MKCOLOUR_XYYX(PC_GRASS_LAND, PC_TREES);
+			return (GetTropicZone(tile) == TROPICZONE_RAINFOREST) ? MKCOLOUR_XYYX(PC_RAINFOREST, PC_TREES) : MKCOLOUR_XYYX(PC_GRASS_LAND, PC_TREES);
 
 		default:
 			return ApplyMask(MKCOLOUR_XXXX(PC_GRASS_LAND), &_smallmap_vehicles_andor[t]);