1 files changed, 412 insertions, 0 deletions
diff --git a/raveos-gnome-theme/theme-data/extensions/installed/blur-my-shell@aunetx/effects/refraction.glsl b/raveos-gnome-theme/theme-data/extensions/installed/blur-my-shell@aunetx/effects/refraction.glsl
new file mode 100644
index 0000000..5d1d241
--- /dev/null
+++ b/raveos-gnome-theme/theme-data/extensions/installed/blur-my-shell@aunetx/effects/refraction.glsl
@@ -0,0 +1,412 @@
+// GLSL port of winaviation-tweaks/liquidass LiquidAssBackboardd/Tweak.mm kShaderSrc.
+// The sampling and blur pass are adapted for Blur my Shell's Clutter pipeline.
+uniform sampler2D tex;
+uniform float width;
+uniform float height;
+uniform float strength;
+uniform float blur_radius;
+uniform float edge_size;
+uniform float falloff;
+uniform float corner_radius;
+uniform float rim_width;
+uniform float rgb_fringing;
+uniform float gloss;
+uniform float tint;
+uniform float tint_r;
+uniform float tint_g;
+uniform float tint_b;
+uniform float tint_a;
+uniform float backdrop_zoom;
+uniform float shadow;
+uniform int texture_repeat;
+uniform int blur_direction;
+uniform int private_pass;
+uniform float clip_x0;
+uniform float clip_y0;
+uniform float clip_width;
+uniform float clip_height;
+uniform float opacity_factor;
+
+const float PI = 3.14159265;
+const float REFRACTIVE_INDEX = 1.52;
+const float DISPERSION_SCALE = 20.0;
+
+const float kDispersionRedIndex = 0.98;
+const float kDispersionGreenIndex = 1.00;
+const float kDispersionBlueIndex = 1.02;
+
+float surfaceConvexSquircle(float x) {
+    return pow(1.0 - pow(1.0 - x, 4.0), 0.25);
+}
+
+vec2 refractRay(vec2 normal, float eta) {
+    float cosI = -normal.y;
+    float k = 1.0 - eta * eta * (1.0 - cosI * cosI);
+    if (k < 0.0)
+        return vec2(0.0);
+
+    float kSqrt = sqrt(k);
+    return vec2(
+        -(eta * cosI + kSqrt) * normal.x,
+        eta - (eta * cosI + kSqrt) * normal.y
+    );
+}
+
+float rawRefraction(float bezelRatio, float glassThickness, float bezelWidth, float eta) {
+    float x = clamp(bezelRatio, 0.05, 0.95);
+    float y = surfaceConvexSquircle(x);
+    float y2 = surfaceConvexSquircle(x + 0.001);
+    float deriv = (y2 - y) / 0.001;
+    float mag = sqrt(deriv * deriv + 1.0);
+    vec2 n = vec2(-deriv / mag, -1.0 / mag);
+    vec2 r = refractRay(n, eta);
+    if (length(r) < 0.0001 || abs(r.y) < 0.0001)
+        return 0.0;
+
+    float remaining = y * bezelWidth + glassThickness;
+    return r.x * (remaining / r.y);
+}
+
+float displacementAtRatio(float bezelRatio, float glassThickness, float bezelWidth, float eta) {
+    float peak = rawRefraction(0.05, glassThickness, bezelWidth, eta);
+    if (abs(peak) < 0.0001)
+        return 0.0;
+
+    float raw = rawRefraction(bezelRatio, glassThickness, bezelWidth, eta);
+    float norm = raw / peak;
+    float profileFalloff = 1.0 - smoothstep(0.0, 1.0, bezelRatio);
+    return norm * profileFalloff;
+}
+
+float fresnelAtRatio(float bezelRatio, float refractiveIndex) {
+    float x = clamp(bezelRatio, 0.02, 0.98);
+    float y0 = surfaceConvexSquircle(max(0.001, x - 0.001));
+    float y1 = surfaceConvexSquircle(min(0.999, x + 0.001));
+    float slope = (y1 - y0) / 0.002;
+    float cosTheta = inversesqrt(1.0 + slope * slope);
+    float f0Base = (refractiveIndex - 1.0) / (refractiveIndex + 1.0);
+    float f0 = f0Base * f0Base;
+    float grazing = pow(1.0 - clamp(cosTheta, 0.0, 1.0), 5.0);
+    float fresnel = f0 + (1.0 - f0) * grazing;
+    return fresnel * (1.0 - smoothstep(0.0, 1.0, bezelRatio));
+}
+
+float dispersionOffsetScale(float channelIndex, float strengthValue) {
+    return 1.0 - (channelIndex - 1.0) * strengthValue;
+}
+
+float luminance(vec3 color) {
+    return dot(color, vec3(0.2126, 0.7152, 0.0722));
+}
+
+vec2 clampUV(vec2 uv) {
+    vec2 px = vec2(1.5 / width, 1.5 / height);
+    return clamp(uv, px, vec2(1.0) - px);
+}
+
+vec2 resolveUV(vec2 uv) {
+    if (texture_repeat == 1) {
+        vec2 mirrored = abs(fract(uv * 0.5) * 2.0 - 1.0);
+        return clampUV(mirrored);
+    }
+
+    return clampUV(uv);
+}
+
+vec4 sampleBackdrop(vec2 uv) {
+    return texture2D(tex, resolveUV(uv));
+}
+
+vec4 sampleGlassBackdrop(vec2 uv) {
+    if (blur_radius <= 0.01)
+        return sampleBackdrop(uv);
+
+    float sigma = max(0.1, blur_radius * 0.5);
+    float pixelStep = blur_direction == 1 ? 1.0 / width : 1.0 / height;
+    vec2 direction = vec2(float(blur_direction), 1.0 - float(blur_direction));
+
+    vec3 gauss;
+    gauss.x = 1.0 / (sqrt(2.0 * PI) * sigma);
+    gauss.y = exp(-0.5 / (sigma * sigma));
+    gauss.z = gauss.y * gauss.y;
+
+    vec4 accum = sampleBackdrop(uv) * gauss.x;
+    float weightSum = gauss.x;
+
+    gauss.xy *= gauss.yz;
+
+    int radius = int(ceil(1.5 * sigma)) * 2;
+    for (int i = 1; i <= radius; i += 2) {
+        float subtotal = gauss.x;
+
+        gauss.xy *= gauss.yz;
+        subtotal += gauss.x;
+
+        float gaussRatio = gauss.x / subtotal;
+        float offset = float(i) + gaussRatio;
+        vec2 uvOffset = direction * offset * pixelStep;
+
+        accum += sampleBackdrop(uv + uvOffset) * subtotal;
+        accum += sampleBackdrop(uv - uvOffset) * subtotal;
+        weightSum += subtotal * 2.0;
+
+        gauss.xy *= gauss.yz;
+    }
+
+    return accum / weightSum;
+}
+
+vec4 tintFallbackSample() {
+    return vec4(vec3(tint_r, tint_g, tint_b), 1.0);
+}
+
+vec4 sampleOrTintFallback(vec2 uv) {
+    vec4 sample = sampleGlassBackdrop(uv);
+    return sample.a < 0.01 ? tintFallbackSample() : sample;
+}
+
+float roundedBoxDistance(vec2 p, vec2 halfSize, float radius) {
+    radius = min(radius, min(halfSize.x, halfSize.y));
+    vec2 q = abs(p) - halfSize + vec2(radius);
+    return length(max(q, 0.0)) + min(max(q.x, q.y), 0.0) - radius;
+}
+
+float squircleCornerDistance(vec2 p, vec2 halfSize, float radius) {
+    const float continuousCornerExtent = 1.528;
+
+    vec2 extent = min(vec2(radius * continuousCornerExtent), halfSize);
+    vec2 core = max(halfSize - extent, vec2(0.0));
+    vec2 q = abs(p) - core;
+    vec2 corner = max(q, vec2(0.0));
+    vec2 normalized = corner / max(extent, vec2(0.001));
+    float superLength = pow(pow(normalized.x, 4.0) + pow(normalized.y, 4.0), 0.25);
+
+    if (q.x <= 0.0 && q.y <= 0.0)
+        return -min(halfSize.x - abs(p.x), halfSize.y - abs(p.y));
+
+    return (superLength - 1.0) * min(extent.x, extent.y);
+}
+
+struct EdgeInfo {
+    float distance;
+    float alpha;
+    vec2 dir;
+};
+
+EdgeInfo estimateAnalyticEdge(vec2 px, vec2 halfSize, float radius, float shortest) {
+    vec2 p = px - halfSize;
+    float signedDistance;
+    vec2 core;
+
+    if (radius >= shortest * 0.49 || radius < 0.5) {
+        core = max(halfSize - vec2(radius), vec2(0.0));
+        signedDistance = roundedBoxDistance(p, halfSize, radius);
+    } else {
+        const float continuousCornerExtent = 1.528;
+        vec2 extent = min(vec2(radius * continuousCornerExtent), halfSize);
+        core = max(halfSize - extent, vec2(0.0));
+        signedDistance = squircleCornerDistance(p, halfSize, radius);
+    }
+
+    EdgeInfo info;
+    info.distance = max(0.0, -signedDistance);
+    info.alpha = clamp(1.0 - max(0.0, signedDistance), 0.0, 1.0);
+
+    vec2 cornerDelta = max(abs(p) - core, vec2(0.0));
+    vec2 normalDelta;
+
+    if (radius < shortest * 0.49 && radius >= 0.5 &&
+        cornerDelta.x > 0.0 && cornerDelta.y > 0.0) {
+        normalDelta = sign(p) * pow(cornerDelta, vec2(3.0));
+    } else {
+        vec2 nearestCore = clamp(p, -core, core);
+        normalDelta = p - nearestCore;
+    }
+
+    float normalLength = length(normalDelta);
+
+    if (normalLength > 0.001) {
+        info.dir = normalDelta / normalLength;
+    } else {
+        vec2 lensPx = px;
+        float dL = lensPx.x;
+        float dR = halfSize.x * 2.0 - lensPx.x;
+        float dT = lensPx.y;
+        float dB = halfSize.y * 2.0 - lensPx.y;
+        float dm = min(min(dL, dR), min(dT, dB));
+
+        info.dir = vec2(
+            (dL < dR && dL == dm) ? -1.0 : (dR <= dL && dR == dm) ? 1.0 : 0.0,
+            (dT < dB && dT == dm) ? -1.0 : (dB <= dT && dB == dm) ? 1.0 : 0.0
+        );
+    }
+
+    return info;
+}
+
+vec2 backdropSampleUV(vec2 sampleUV, vec2 displacementPx) {
+    vec2 displaced = sampleUV + displacementPx / vec2(width, height);
+    float zoom = max(backdrop_zoom, 0.01);
+
+    displaced = vec2(0.5) + (displaced - vec2(0.5)) / zoom;
+    return displaced;
+}
+
+vec4 sampleDispersed(vec2 sampleUV, vec2 dispPx, float dispersion) {
+    float greenScale = dispersionOffsetScale(kDispersionGreenIndex, dispersion);
+    vec2 greenUV = resolveUV(backdropSampleUV(sampleUV, dispPx * greenScale));
+    vec4 greenSample = sampleGlassBackdrop(greenUV);
+
+    vec4 fallback = vec4(0.0);
+    bool loadedFallback = false;
+    if (greenSample.a < 0.01) {
+        vec2 fallbackUV = resolveUV(backdropSampleUV(sampleUV, vec2(0.0)));
+
+        fallback = sampleOrTintFallback(fallbackUV);
+        loadedFallback = true;
+        greenSample = fallback;
+    }
+
+    if (greenSample.a < 0.01)
+        return tintFallbackSample();
+
+    vec4 bg = greenSample;
+    if (dispersion > 0.001 && dot(dispPx, dispPx) > 0.0001) {
+        float redScale = dispersionOffsetScale(kDispersionRedIndex, dispersion);
+        float blueScale = dispersionOffsetScale(kDispersionBlueIndex, dispersion);
+
+        vec2 redUV = resolveUV(backdropSampleUV(sampleUV, dispPx * redScale));
+        vec2 blueUV = resolveUV(backdropSampleUV(sampleUV, dispPx * blueScale));
+        vec4 redSample = sampleGlassBackdrop(redUV);
+        vec4 blueSample = sampleGlassBackdrop(blueUV);
+
+        if (redSample.a < 0.01 || blueSample.a < 0.01) {
+            if (!loadedFallback) {
+                vec2 fallbackUV = resolveUV(backdropSampleUV(sampleUV, vec2(0.0)));
+                fallback = sampleOrTintFallback(fallbackUV);
+            }
+
+            if (redSample.a < 0.01)
+                redSample = fallback.a < 0.01 ? tintFallbackSample() : fallback;
+
+            if (blueSample.a < 0.01)
+                blueSample = fallback.a < 0.01 ? tintFallbackSample() : fallback;
+        }
+
+        bg.r = redSample.r;
+        bg.g = greenSample.g;
+        bg.b = blueSample.b;
+        bg.a = greenSample.a;
+    }
+    return bg;
+}
+
+vec4 applyTintAndShadow(vec4 sample, vec2 localUV, float alpha) {
+    vec3 tintColor = vec3(tint_r, tint_g, tint_b);
+    vec3 outRGB = mix(sample.rgb, tintColor, tint * tint_a);
+
+    outRGB *= 1.0 - smoothstep(0.25, 1.0, localUV.y) * shadow * 0.20;
+
+    return vec4(clamp(outRGB, 0.0, 1.0) * alpha, alpha);
+}
+
+void main() {
+    vec2 actorSize = vec2(width, height);
+    vec2 actorUV = cogl_tex_coord_in[0].xy;
+
+    if (private_pass == 1) {
+        cogl_color_out = sampleGlassBackdrop(actorUV);
+        return;
+    }
+
+    vec2 actorPx = actorUV * actorSize;
+    vec4 bounds = clip_width < 0.0 || clip_height < 0.0
+        ? vec4(0.0, 0.0, width, height)
+        : vec4(clip_x0, clip_y0, clip_x0 + clip_width, clip_y0 + clip_height);
+
+    vec2 glassSize = max(bounds.zw - bounds.xy, vec2(1.0));
+    vec2 glassPx = actorPx - bounds.xy;
+    vec2 halfSize = glassSize * 0.5;
+    vec2 localUV = glassPx / glassSize;
+
+    float W = glassSize.x;
+    float H = glassSize.y;
+    float shortestSide = min(W, H);
+    float R = clamp(corner_radius, 0.0, shortestSide * 0.5);
+    float bezel = max(1.0, min(edge_size, shortestSide * 0.5));
+    float glassThickness = max(0.5, edge_size * 0.55 * falloff);
+    float eta = 1.0 / REFRACTIVE_INDEX;
+
+    bool nearlySquare = abs(W - H) < max(4.0, shortestSide * 0.035);
+    bool useCircularSurface = nearlySquare && R >= shortestSide * 0.34;
+
+    EdgeInfo edge = estimateAnalyticEdge(glassPx, halfSize, R, shortestSide);
+    if (edge.alpha <= 0.0) {
+        cogl_color_out = vec4(0.0);
+        return;
+    }
+
+    float distFromSide = edge.distance;
+    float edgeOpacity = edge.alpha;
+    float edgeBand = 1.0;
+    float refractionBand = bezel;
+    vec2 dir = edge.dir;
+
+    if (useCircularSurface) {
+        float circleRadius = shortestSide * 0.5;
+        vec2 circleCenter = glassSize * 0.5;
+        vec2 fromCenter = glassPx - circleCenter;
+        float circleDistance = length(fromCenter);
+
+        if (circleDistance > circleRadius + 1.0) {
+            cogl_color_out = vec4(0.0);
+            return;
+        }
+
+        distFromSide = max(0.0, circleRadius - circleDistance);
+        dir = circleDistance > 0.001 ? normalize(fromCenter) : vec2(0.0, -1.0);
+        edgeOpacity = clamp(1.0 - max(0.0, circleDistance - circleRadius), 0.0, 1.0);
+
+        float rimRadius = max(1.0, bezel * 0.35);
+        refractionBand = rimRadius;
+        edgeBand = clamp(1.0 - (distFromSide / rimRadius), 0.0, 1.0);
+    } else {
+        float rimRadius = max(1.0, bezel * 0.35 * max(1.0, rim_width));
+        refractionBand = rimRadius;
+        edgeBand = clamp(1.0 - (distFromSide / rimRadius), 0.0, 1.0);
+    }
+
+    if (!useCircularSurface && R < shortestSide * 0.45 && distFromSide >= refractionBand) {
+        vec2 flatUV = backdropSampleUV(actorUV, vec2(0.0));
+        vec4 flatSample = sampleOrTintFallback(resolveUV(flatUV));
+        float finalOpacity = edgeOpacity * opacity_factor;
+
+        cogl_color_out = applyTintAndShadow(flatSample, localUV, finalOpacity);
+        return;
+    }
+
+    float bezelRatio = clamp(distFromSide / refractionBand, 0.0, 1.0);
+    float normDisp = distFromSide < refractionBand
+        ? displacementAtRatio(bezelRatio, glassThickness, refractionBand, eta)
+        : 0.0;
+    float dispStrength = useCircularSurface ? edgeOpacity : edgeBand;
+    vec2 dispPx = -dir * normDisp * refractionBand * strength * dispStrength;
+
+    float dispersion = clamp(rgb_fringing * DISPERSION_SCALE, 0.0, 20.0);
+    vec4 bgColor = sampleDispersed(actorUV, dispPx, dispersion);
+    if (bgColor.a < 0.01) {
+        cogl_color_out = vec4(0.0);
+        return;
+    }
+
+    vec3 outRGB = mix(bgColor.rgb, vec3(tint_r, tint_g, tint_b), tint * tint_a);
+    float fresnel = fresnelAtRatio(bezelRatio, REFRACTIVE_INDEX) * edgeOpacity;
+    float bgLuminance = luminance(outRGB);
+    float glare = clamp(fresnel * 0.70 * mix(0.40, 1.0, bgLuminance), 0.0, 0.18)
+        * clamp(gloss, 0.0, 1.0);
+    outRGB = 1.0 - (1.0 - outRGB) * (1.0 - glare);
+    outRGB *= 1.0 - smoothstep(0.25, 1.0, localUV.y) * shadow * 0.20;
+
+    float finalOpacity = edgeOpacity * opacity_factor;
+    cogl_color_out = vec4(clamp(outRGB, 0.0, 1.0) * finalOpacity, finalOpacity);
+}