first commit

shader/hqfilter.frag

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+#version 450 core
+
+layout(binding = 2) uniform sampler2D tex;
+
+layout(location = 0) in vec2 FragmentTexCoord;
+layout(location = 0) out vec4 FragColor;
+
+vec4 hqfilter(sampler2D samp, vec2 tc)
+{
+    // Get the size of the texture we'll be sampling from
+    vec2 texSize = textureSize(samp, 0);
+
+    // Scale our input texture coordinates up, move to center of texel
+    vec2 uvScaled = tc * texSize + 0.5;
+
+    // Find integer and fractional parts of texture coordinate
+    vec2 uvInt = floor(uvScaled);
+    vec2 uvFrac = fract(uvScaled);
+
+    // Replace fractional part of texture coordinate
+    uvFrac = smoothstep(0.0, 1.0, uvFrac);
+
+    // Reassemble texture coordinate, remove bias, and
+    // scale back to 0.0 - 1.0 ranage
+    vec2 uv = (uvInt + uvFrac - 0.5) / texSize;
+
+    // Regular texture lookup
+    return texture(samp, uv);
+}
+
+void main()
+{
+    FragColor=hqfilter(tex,FragmentTexCoord);
+}