Added the ability to scale/move for layer

Shaders/Layer.fx

@@ -2,7 +2,7 @@
 | :: Description :: |
 '-------------------/
 
-    Layer (version 0.1)
+    Layer (version 0.2)
 
     Author: CeeJay.dk
     License: MIT
@@ -14,50 +14,82 @@
 
     Ideas for future improvement:
     * More blend modes
-    * Texture size, placement and tiling control
+    * Tiling control
     * A default Layer texture with something useful in it
 
     History:
     (*) Feature (+) Improvement (x) Bugfix (-) Information (!) Compatibility
 
-    Version 0.1
-    *
+    Version 0.2 by seri14 & Marot Satil
+    * Added the ability to scale and move the layer around on an x, y axis.
 */
 
 #include "ReShade.fxh"
 
-#if LAYER_SINGLECHANNEL //I plan to have some option to let users set this for performance sake.
+#ifndef LAYER_SOURCE
+#define LAYER_SOURCE "layer.png"
+#endif
+#ifndef LAYER_SIZE_X
+#define LAYER_SIZE_X 1280
+#endif
+#ifndef LAYER_SIZE_Y
+#define LAYER_SIZE_Y 720
+#endif
+
+#if LAYER_SINGLECHANNEL
     #define TEXFORMAT R8
 #else
     #define TEXFORMAT RGBA8
 #endif
 
 #include "ReShadeUI.fxh"
 
-//TODO blend by alpha
-uniform float Layer_Blend < __UNIFORM_SLIDER_FLOAT1
+uniform float2 Layer_Pos < __UNIFORM_DRAG_FLOAT2
+    ui_label = "Layer Position";
+    ui_min = 0.0; ui_max = 1.0;
+	ui_step = (1.0 / 200.0);
+> = float2(0.5, 0.5);
+
+uniform float Layer_Scale < __UNIFORM_DRAG_FLOAT1
+    ui_label = "Layer Scale";
+    ui_min = (1.0 / 100.0); ui_max = 4.0;
+    ui_step = (1.0 / 250.0);
+> = 1.0;
+
+uniform float Layer_Blend < __UNIFORM_COLOR_FLOAT1
     ui_label = "Layer Blend";
     ui_tooltip = "How much to blend layer with the original image.";
-    ui_min = 0.0;
-    ui_max = 1.0;
-    ui_step = 0.002;
+    ui_min = 0.0; ui_max = 1.0;
+    ui_step = (1.0 / 255.0); // for slider and drag
 > = 1.0;
 
-texture Layer_texture <source="Layer.png";> { Width = BUFFER_WIDTH; Height = BUFFER_HEIGHT; Format=TEXFORMAT; };
-
-sampler Layer_sampler { Texture = Layer_texture; };
-
-float3 PS_Layer(float4 pos : SV_Position, float2 texcoord : TEXCOORD) : SV_Target {
-    float3 color = tex2D(ReShade::BackBuffer, texcoord).rgb;
-    float4 layer = tex2D(Layer_sampler, texcoord).rgba;
-
-    color = lerp(color, layer.rgb, layer.a * Layer_Blend);
-
-    return color;
-    //return layer.aaa;
+texture Layer_Tex <
+    source = LAYER_SOURCE;
+> {
+    Format = TEXFORMAT;
+    Width  = LAYER_SIZE_X;
+    Height = LAYER_SIZE_Y;
+};
+
+sampler Layer_Sampler
+{
+    Texture  = Layer_Tex;
+    AddressU = BORDER;
+    AddressV = BORDER;
+};
+
+void PS_Layer(float4 pos : SV_Position, float2 texCoord : TEXCOORD, out float4 passColor : SV_Target)
+{
+    const float4 backColor = tex2D(ReShade::BackBuffer, texCoord);
+    const float2 pixelSize = 1.0 / (float2(LAYER_SIZE_X, LAYER_SIZE_Y) * Layer_Scale / ReShade::ScreenSize);
+    const float4 layer     = tex2D(Layer_Sampler, texCoord * pixelSize + Layer_Pos * (1.0 - pixelSize));
+
+    passColor   = lerp(backColor, layer, layer.a * Layer_Blend);
+    passColor.a = backColor.a;
 }
 
-technique Layer {
+technique Layer
+{
     pass
     {
         VertexShader = PostProcessVS;