Move towards pixel upscaling filter

shader/texture/antia.frag

@@ -0,0 +1,21 @@
+#version 450 core
+in vec2 vTexPos;
+out vec4 fColor;
+layout (location = 0) uniform vec2 screensize;
+layout(binding = 0) uniform sampler2D screenTexture;
+float xoff = 2 / screensize.x;
+float yoff = 2 / screensize.y;
+vec3 f (float x, float y)
+{ return texture(screenTexture, vTexPos + vec2(x*xoff,y*yoff)).xyz; 
+}
+void main() 
+{
+vec3 tl = f(-1, 1);
+vec3 tt = f( 0, 1);
+vec3 tr = f( 1, 1);
+vec3 mr = f( 1, 0);
+vec3 br = f( 1,-1);
+    if (tl == tt && tt == tr && tr == mr && mr == br)
+        { fColor = vec4(tl,1);}
+    else {fColor = texture(screenTexture, vTexPos); }
+}

shader/texture/antia.vert

@@ -0,0 +1,7 @@
+#version 450 core
+layout (std140, binding = 2) uniform PosTex { vec4 posTex[3]; };
+out vec2 vTexPos;
+void main() {
+  gl_Position = vec4(posTex[gl_VertexID].xy,0,1);
+  vTexPos = posTex[gl_VertexID].zw ;
+}

shader/texture/arrayPos.frag

@@ -1,16 +0,0 @@
-#version 450 core
-in vec3 vTexPos;
-in vec3 vPos;
-layout (location=0) out vec4 fCol;
-layout (location=1) out vec4 fPos;
-layout (location=2) out vec4 normal;
-//layout (binding=0) uniform sampler2DArray tilesetSampler;
-layout (binding=1) uniform sampler2D normalSampler;
-void main()
-{
-    //fCol = texture(tilesetSampler, vec3(0.3,0.1,0) + vTexPos);
-    fCol = vec4(0.2,0.3,0.6,1);
-    //fCol = vec4(0.6,0.4,0.3,1);
-    fPos = vec4(vPos,1);
-    normal = vec4(vec3(0.5) - texture(normalSampler,2*vTexPos.xy).xyz,0);
-}

shader/texture/arrayPos.vert

@@ -1,12 +0,0 @@
-#version 450 core
-layout (location = 0) in vec3 pos;
-layout (location = 1) in vec3 texPos;
-layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
-out vec3 vTexPos;
-out vec3 vPos;
-void main()
-{
-  gl_Position = theMat * vec4(pos,1.0) ;
-  vTexPos = texPos;
-  vPos = pos;
-}