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actually memory is bad

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Signed-off-by: lizzie <lizzie@eden-emu.dev>
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lizzie 2025-09-20 14:26:53 +00:00 • committed by crueter
parent dba2a0a428
commit f28fe360c3
1 changed files with 19 additions and 13 deletions
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32
src/video_core/host_shaders/present_lanczos.frag
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@ -9,23 +9,29 @@ layout (location = 0) in vec2 frag_tex_coord;
layout (location = 0) out vec4 color;
layout (binding = 0) uniform sampler2D color_texture;
// precomputed kernel
const float w_kernel[49] = float[] (
-0.238811f, 0.531959f, 0.961865f, 1.000000f, 0.961865f, 0.531959f, -0.238811f, 0.531959f, 0.957419f, 0.313883f, -0.000000f, 0.313883f, 0.957419f, 0.531959f, 0.961865f, 0.313883f, -0.322602f, 0.000000f, -0.322602f, 0.313883f, 0.961865f, 1.000000f, -0.000000f, 0.000000f, 1.000000f, 0.000000f, -0.000000f, 1.000000f, 0.961865f, 0.313883f, -0.322602f, 0.000000f, -0.322602f, 0.313883f, 0.961865f, 0.531959f, 0.957419f, 0.313883f, -0.000000f, 0.313883f, 0.957419f, 0.531959f, -0.238811f, 0.531959f, 0.961865f, 1.000000f, 0.961865f, 0.531959f, -0.238811f
);
const vec2 w_pos[49] = vec2[] (
vec2(-0.750000f, -0.750000f), vec2(-0.750000f, -0.500000f), vec2(-0.750000f, -0.250000f), vec2(-0.750000f, 0.000000f), vec2(-0.750000f, 0.250000f), vec2(-0.750000f, 0.500000f), vec2(-0.750000f, 0.750000f), vec2(-0.500000f, -0.750000f), vec2(-0.500000f, -0.500000f), vec2(-0.500000f, -0.250000f), vec2(-0.500000f, 0.000000f), vec2(-0.500000f, 0.250000f), vec2(-0.500000f, 0.500000f), vec2(-0.500000f, 0.750000f), vec2(-0.250000f, -0.750000f), vec2(-0.250000f, -0.500000f), vec2(-0.250000f, -0.250000f), vec2(-0.250000f, 0.000000f), vec2(-0.250000f, 0.250000f), vec2(-0.250000f, 0.500000f), vec2(-0.250000f, 0.750000f), vec2(0.000000f, -0.750000f), vec2(0.000000f, -0.500000f), vec2(0.000000f, -0.250000f), vec2(0.000000f, 0.000000f), vec2(0.000000f, 0.250000f), vec2(0.000000f, 0.500000f), vec2(0.000000f, 0.750000f), vec2(0.250000f, -0.750000f), vec2(0.250000f, -0.500000f), vec2(0.250000f, -0.250000f), vec2(0.250000f, 0.000000f), vec2(0.250000f, 0.250000f), vec2(0.250000f, 0.500000f), vec2(0.250000f, 0.750000f), vec2(0.500000f, -0.750000f), vec2(0.500000f, -0.500000f), vec2(0.500000f, -0.250000f), vec2(0.500000f, 0.000000f), vec2(0.500000f, 0.250000f), vec2(0.500000f, 0.500000f), vec2(0.500000f, 0.750000f), vec2(0.750000f, -0.750000f), vec2(0.750000f, -0.500000f), vec2(0.750000f, -0.250000f), vec2(0.750000f, 0.000000f), vec2(0.750000f, 0.250000f), vec2(0.750000f, 0.500000f), vec2(0.750000f, 0.750000f)
);
const float w_sum = 21.045683f;
#define PI 3.1415926535897932384626433
float sinc(float x) {
return x == 0.0f ? 1.0f : sin(PI * x) / (PI * x);
}
float lanczos(vec2 v, float a) {
float d = length(v);
return sinc(d) / sinc(d / a);
}
vec4 textureLanczos(sampler2D textureSampler, vec2 p) {
vec3 c_sum = vec3(0.0f);
float w_sum = 0.0f;
vec2 res = vec2(textureSize(textureSampler, 0));
vec2 cc = floor(p * res) / res;
for (int i = 0; i < 49; i++) { // kernel size = (r * 2 + 1) ^ 2
vec2 kp = w_pos[i] / res;
vec2 uv = cc + kp;
c_sum += w_kernel[i] * texture(textureSampler, p + kp).rgb;
}
// kernel size = (2r + 1)^2
const int r = 3; //radius (1 = 3 steps)
for (int x = -r; x <= r; x++)
for (int y = -r; y <= r; y++) {
vec2 kp = 0.5f * (vec2(x, y) / res); // 0.5 = half-pixel level resampling
vec2 uv = cc + kp;
float w = lanczos(kp, float(r));
c_sum += w * texture(textureSampler, p + kp).rgb;
w_sum += w;
}
return vec4(c_sum / w_sum, 1.0f);
}