A super-simple shader (#3236)

A super-simple shader refined from the super-fast

data/resources/shaders/reshade/Shaders/XY-Pos-free.fx

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+#include "ReShade.fxh"
+
+//  CrashGG presents
+
+//  'XY-Pos-free' 
+
+//  A super-simple shader refined from the super-fast crt-cyclon.fx, It only provides
+//  the functions of free pixel stretching and position translation on the XY axis.
+//  Suitable for users who only want to fine-tune the screen zoom and position and do not like the bundled CRT-like effects.
+//  Fixed some bugs in the original version, adjusted the step progress and the range.
+
+//  This program is free software; you can redistribute it and/or modify it
+//  under the terms of the GNU General Public License as published by the Free
+//  Software Foundation; either version 2 of the License, or (at your option)
+//  any later version.
+
+
+uniform float zoomx <
+	ui_type = "drag";
+	ui_min = -0.3000;
+	ui_max = 0.3000;
+	ui_step = 0.0005;
+	ui_label = "Zoom Image X";
+> = 0.0000;
+
+uniform float zoomy <
+	ui_type = "drag";
+	ui_min = -0.3000;
+	ui_max = 0.3000;
+	ui_step = 0.0005;
+	ui_label = "Zoom Image Y";
+> = 0.0000;
+
+uniform float centerx <
+	ui_type = "drag";
+	ui_min = -9.99;
+	ui_max = 9.99;
+	ui_step = 0.01;
+	ui_label = "Image Center X";
+> = 0.00;
+
+uniform float centery <
+	ui_type = "drag";
+	ui_min = -9.99;
+	ui_max = 9.99;
+	ui_step = 0.01;
+	ui_label = "Image Center Y";
+> = 0.00;
+
+
+float2 Warp(float2 pos)
+{
+    pos = pos*2.0-1.0;
+    pos *= float2(1.0+pos.y*pos.y*0, 1.0+pos.x*pos.x*0);
+    pos = pos*0.5+0.5;
+
+    return pos;
+}
+
+
+float4 CRT_CYCLON_PS(float4 vpos: SV_Position, float2 vTexCoord : TEXCOORD0) : SV_Target
+{
+// zoom in and center screen
+    float2 pos = Warp((vTexCoord*float2(1.0-zoomx,1.0-zoomy)-float2(centerx,centery)/100.0));
+
+// Convergence
+    float3 res = tex2D(ReShade::BackBuffer,pos).rgb;
+
+// Vignette
+    float x = 0.0;
+
+    return float4(res, 1.0);
+}
+
+
+
+technique CRT_CYCLON
+{
+   pass PS_CRT_CYCLON
+   {
+   	VertexShader = PostProcessVS;
+   	PixelShader  = CRT_CYCLON_PS;
+   }
+}