Fry3DX 0.4: an easy 3D modeller

Shapes with live settings, shape editing, knife and hole tools, drawing
shapes onto other objects, combining objects (add / subtract / overlap),
copies, thickness, painting with stickers and layers, a Layout tab, a
Print tab with checks, packed .fry files with autosave, export to GLB,
glTF, FBX, OBJ, 3MF, STL and PLY, folders in Layers, its own crash
screen, and a website for GitHub Pages in docs/.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NMSrd5oe1GpUD7E6d825KP

engine/shaders/bloom_up.frag

@@ -0,0 +1,25 @@
+#version 460
+// Bloom, coming up: a 3×3 tent of the smaller level, added onto the larger one (blended).
+#define KEEL_POST // screen-space: render targets, sampled clamped
+#include "backend.glsl"
+PUSH_BLOCK {
+    uint src;
+    uint srcW, srcH;
+    uint outW, outH;
+    float radius;
+} pc;
+layout(location = 0) out vec4 o_color;
+
+vec3 tap(vec2 uv) {
+    vec2 h = 0.5 / vec2(pc.srcW, pc.srcH);
+    return sampleTex(pc.src, clamp(uv, h, 1.0 - h)).rgb;
+}
+
+void main() {
+    vec2 uv = gl_FragCoord.xy / vec2(pc.outW, pc.outH);
+    vec2 t = pc.radius / vec2(pc.srcW, pc.srcH);
+    vec3 s = tap(uv) * 4.0;
+    s += (tap(uv + vec2(-t.x, 0)) + tap(uv + vec2(t.x, 0)) + tap(uv + vec2(0, -t.y)) + tap(uv + vec2(0, t.y))) * 2.0;
+    s += tap(uv + vec2(-t.x, -t.y)) + tap(uv + vec2(t.x, -t.y)) + tap(uv + vec2(-t.x, t.y)) + tap(uv + vec2(t.x, t.y));
+    o_color = vec4(s / 16.0, 1.0);
+}