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