Added Var and Var Index support for Picture Tint

While testing, I found out the following things:
- You cannot mix multiple Variable types for each parameters
- When using Variables for Picture Tint, parameter 17 is set to 4096 (0x100),
- When using Var Indexes for Picture Tint, parameter 17 is set to 8192 (0x200),
- Before, parameters for red, green, blue and saturation were always constants.
- Surprisingly this feature doesn't work with ShowStringPicture

Added:
- Variable and VarIndex support for Tinting using ShowPicture and MovePicture

src/game_interpreter.cpp

@@ -2833,6 +2833,20 @@ bool Game_Interpreter::CommandShowPicture(lcf::rpg::EventCommand const& com) { /
 			}
 			params.name = PicPointerPatch::ReplaceName(params.name, var, com.parameters[18]);
 		}
+		if (com.parameters[17] & 0x1000 && Player::IsPatchManiac()) {
+			// Color tint using variables
+			params.red = ValueOrVariable(1, params.red);
+			params.green = ValueOrVariable(1, params.green);
+			params.blue = ValueOrVariable(1, params.blue);
+			params.saturation = ValueOrVariable(1, params.saturation);
+		}
+		if (com.parameters[17] & 0x2000 && Player::IsPatchManiac()) {
+			// Color tint using variables indexes
+			params.red = ValueOrVariable(2, params.red);
+			params.green = ValueOrVariable(2, params.green);
+			params.blue = ValueOrVariable(2, params.blue);
+			params.saturation = ValueOrVariable(2, params.saturation);
+		}
 		params.magnify = ValueOrVariable(com.parameters[20], params.magnify);
 		params.top_trans = ValueOrVariable(com.parameters[21], params.top_trans);
 		if (com.parameters[22] > 0) {
@@ -2948,6 +2962,21 @@ bool Game_Interpreter::CommandMovePicture(lcf::rpg::EventCommand const& com) { /
 		// RPG2k and RPG2k3 1.10 do not support this option
 		params.bottom_trans = params.top_trans;
 
+		if (com.parameters[17] & 0x1000 && Player::IsPatchManiac()) {
+			// Color tint using variables
+			params.red = ValueOrVariable(1, params.red);
+			params.green = ValueOrVariable(1, params.green);
+			params.blue = ValueOrVariable(1, params.blue);
+			params.saturation = ValueOrVariable(1, params.saturation);
+		}
+		if (com.parameters[17] & 0x2000 && Player::IsPatchManiac()) {
+			// Color tint using variables indexes
+			params.red = ValueOrVariable(2, params.red);
+			params.green = ValueOrVariable(2, params.green);
+			params.blue = ValueOrVariable(2, params.blue);
+			params.saturation = ValueOrVariable(2, params.saturation);
+		}
+
 		if (Player::IsPatchManiac() && param_size > 16) {
 			int flags = com.parameters[16] >> 8;
 			int blend_mode = flags & 3;