- refactored r_videoscale.cpp to use a table.

- reordered vid_scalemode modes to be a little neater, having static modes and scalar modes separate, with a buffer in between so new modes can be added in the future without disrupting the current order.

src/r_videoscale.cpp

@@ -25,9 +25,38 @@
 #include "c_dispatch.h"
 #include "c_cvars.h"
 
+#define NUMSCALEMODES 11
+
+namespace vidscale
+{
+	struct v_ScaleTable
+	{
+		bool isValid;
+		bool isLinear;
+		uint32_t(*GetScaledWidth)(uint32_t Width);
+		uint32_t(*GetScaledHeight)(uint32_t Height);
+		bool isScaled43;
+	};
+	v_ScaleTable vScaleTable[NUMSCALEMODES] =
+	{
+		//	isValid,	isLinear,	GetScaledWidth(),										GetScaledHeight(),											isScaled43
+		{ true,			false,		[](uint32_t Width)->uint32_t { return Width; },			[](uint32_t Height)->uint32_t { return Height; },			false	},	// 0  - Native
+		{ true,			false,		[](uint32_t Width)->uint32_t { return 320; },			[](uint32_t Height)->uint32_t { return 200; },				true	},	// 1  - 320x200
+		{ true,			true,		[](uint32_t Width)->uint32_t { return 640; },			[](uint32_t Height)->uint32_t { return 400; },				true	},	// 2  - 640x400
+		{ true,			true,		[](uint32_t Width)->uint32_t { return 1280; },			[](uint32_t Height)->uint32_t { return 800; },				true	},	// 3  - 1280x800		
+		{ false,		false,		nullptr,												nullptr,													false	},	// 4
+		{ false,		false,		nullptr,												nullptr,													false	},	// 5
+		{ false,		false,		nullptr,												nullptr,													false	},	// 6
+		{ false,		false,		nullptr,												nullptr,													false	},	// 7
+		{ true,			false,		[](uint32_t Width)->uint32_t { return Width / 2; },		[](uint32_t Height)->uint32_t { return Height / 2; },		false	},	// 8  - Half-Res
+		{ true,			true,		[](uint32_t Width)->uint32_t { return Width * 0.75; },	[](uint32_t Height)->uint32_t { return Height * 0.75; },	false	},	// 9  - Res * 0.75
+		{ true,			true,		[](uint32_t Width)->uint32_t { return Width * 2; },		[](uint32_t Height)->uint32_t { return Height * 2; },		false	},	// 10 - SSAAx2
+	};
+}
+
 CUSTOM_CVAR(Int, vid_scalemode, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 {
-	if (self < 0 || self > 6)
+	if (self < 0 || self >= NUMSCALEMODES || vidscale::vScaleTable[self].isValid == false)
 	{
 		self = 0;
 	}
@@ -35,53 +64,22 @@ CUSTOM_CVAR (Int, vid_scalemode, 0, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
 
 bool ViewportLinearScale()
 {
-	switch(vid_scalemode)
+	return vidscale::vScaleTable[vid_scalemode].isLinear;
-	{
-	default: return false;
-	case 4:
-	case 5:
-	case 6: return true;
-	}
 }
 
 int ViewportScaledWidth(int width)
 {
-	switch (vid_scalemode)
+	return vidscale::vScaleTable[vid_scalemode].GetScaledWidth(width);
-	{
-	default:
-	case 0: return width;
-	case 1: return 320;
-	case 2: return 640;
-	case 3: return (int)roundf(width * 0.5f);
-	case 4: return (int)roundf(width * 0.75f);
-	case 5: return width * 2;
-	case 6: return 1280;
-	}
 }
 
 int ViewportScaledHeight(int height)
 {
-	switch (vid_scalemode)
+	return vidscale::vScaleTable[vid_scalemode].GetScaledHeight(height);
-	{
-	default:
-	case 0: return height;
-	case 1: return 200;
-	case 2: return 400;
-	case 3: return (int)roundf(height * 0.5f);
-	case 4: return (int)roundf(height * 0.75f);
-	case 5: return height * 2;
-	case 6: return 800;
-	}
 }
 
 bool ViewportIsScaled43()
 {
-	switch (vid_scalemode)
+	return vidscale::vScaleTable[vid_scalemode].isScaled43;
-	{
-	default: return false;
-	case 1:
-	case 2:
-	case 6: return true;
-	}
 }
 
+

wadsrc/static/menudef.txt

@@ -1861,10 +1861,10 @@ OptionValue ScaleModes
 	0, "$OPTVAL_OFF"
 	1, "320x200"
 	2, "640x400"
-	3, "0.5x"
+	3, "1280x800"
-	4, "0.75x"
+	8, "0.5x"
-	5, "2x SSAA"
+	9, "0.75x"
-	6, "1280x800"
+	10, "2x SSAA"
 }
 
 OptionMenu VideoModeMenu protected