Config: Add integer scaling options

mkxp.conf.sample

@@ -150,6 +150,30 @@
 # maxTextureSize=0
 
 
+# Scale up the game screen by an integer amount,
+# as large as the current window size allows, before
+# doing any last additional scalings to fill part or
+# all of the remaining window space (or none at all
+# if lastMileScaling is disabled).
+# If fixedAspectRatio is disabled, the integer scale
+# factors in horizontal and vertical direction can differ
+# depending on how much space is available, otherwise
+# they are forced to the smaller of the two.
+# (default: disabled)
+#
+# integerScaling.active = false
+
+
+# When integer scaling is enabled, this option controls
+# whether the scaled game screen is further scaled
+# (with linear interpolation when smoothScaling is enabled)
+# to fill the rest of the game window.
+# Note that this option still respects fixedAspectRatio.
+# (default: enabled)
+#
+# integerScaling.lastMileScaling = true
+
+
 # Set the base path of the game to '/path/to/game'
 # (default: executable directory)
 #

src/config.cpp

@@ -170,6 +170,8 @@ void Config::read(int argc, char *argv[])
 	PO_DESC(subImageFix, bool, false) \
 	PO_DESC(enableBlitting, bool, true) \
 	PO_DESC(maxTextureSize, int, 0) \
+	PO_DESC(integerScaling.active, bool, false) \
+	PO_DESC(integerScaling.lastMileScaling, bool, true) \
 	PO_DESC(gameFolder, std::string, ".") \
 	PO_DESC(anyAltToggleFS, bool, false) \
 	PO_DESC(enableReset, bool, true) \

src/config.h

@@ -59,6 +59,12 @@ struct Config
 	bool enableBlitting;
 	int maxTextureSize;
 
+	struct
+	{
+		bool active;
+		bool lastMileScaling;
+	} integerScaling;
+
 	std::string gameFolder;
 	bool anyAltToggleFS;
 	bool enableReset;