Orkuncakilkaya
f25289db20
`Gl.*` binds the whole OpenGL 4.1 core API — every entry point of the platform gl3.h with every GL_* constant, generated by `ludic-dev glgen` with per-call ABI thunks. Windowed builds get an NSOpenGLContext on the existing window at Retina resolution; headless builds render into an offscreen CGL context, so a program that uses Gl.* renders and screenshots identically under the test harness. It links gl.ll, the thunks and OpenGL.framework only when used; every other build stays byte-identical. packages/ludic.render3d is a physically based renderer written on that surface: HDRI image-based lighting, GPU-generated terrain with scanned PBR materials, CDLOD, cascaded shadows, glTF with skinning, instanced vegetation with impostors, procedural grass, water, SSAO, and an HDR pipeline with bloom, auto-exposure and ACES. It also carries this session's work on it: the terrain at half its cost (10.3 -> 5.4 ms of frame), the streaming hitch that got worse the longer you played, a resize that emptied the world, and the packaging that lets a game use the renderer from its own repository — `ludic assets`, the material manifest shipping with the package, and shader lookup falling back to the install root. See changes/ for each, with its numbers. The camping game that drove all of it has moved out to its own repository, Maroon Lake; examples/rendering/smooth.ludic stays as the renderer's example here. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
27 lines
1.6 KiB
GLSL
27 lines
1.6 KiB
GLSL
// 13-tap downsample (Jimenez), with a soft threshold on the first level
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in vec2 v_uv;
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out vec4 o_color;
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uniform sampler2D u_src;
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uniform vec2 u_texel;
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uniform float u_threshold; // <0: no threshold
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void main() {
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vec2 t = u_texel;
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vec3 a = texture(u_src, v_uv + t * vec2(-2, 2)).rgb, b = texture(u_src, v_uv + t * vec2(0, 2)).rgb, c = texture(u_src, v_uv + t * vec2(2, 2)).rgb;
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vec3 d = texture(u_src, v_uv + t * vec2(-2, 0)).rgb, e = texture(u_src, v_uv).rgb, f = texture(u_src, v_uv + t * vec2(2, 0)).rgb;
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vec3 g = texture(u_src, v_uv + t * vec2(-2, -2)).rgb, h = texture(u_src, v_uv + t * vec2(0, -2)).rgb, i = texture(u_src, v_uv + t * vec2(2, -2)).rgb;
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vec3 j = texture(u_src, v_uv + t * vec2(-1, 1)).rgb, k = texture(u_src, v_uv + t * vec2(1, 1)).rgb;
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vec3 l = texture(u_src, v_uv + t * vec2(-1, -1)).rgb, m = texture(u_src, v_uv + t * vec2(1, -1)).rgb;
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a = min(a, vec3(4096.0)); b = min(b, vec3(4096.0)); c = min(c, vec3(4096.0)); d = min(d, vec3(4096.0)); e = min(e, vec3(4096.0));
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f = min(f, vec3(4096.0)); g = min(g, vec3(4096.0)); h = min(h, vec3(4096.0)); i = min(i, vec3(4096.0)); j = min(j, vec3(4096.0));
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k = min(k, vec3(4096.0)); l = min(l, vec3(4096.0)); m = min(m, vec3(4096.0));
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vec3 col = e * 0.125 + (a + c + g + i) * 0.03125 + (b + d + f + h) * 0.0625 + (j + k + l + m) * 0.125;
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if (u_threshold >= 0.0) {
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float br = max(col.r, max(col.g, col.b));
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float knee = u_threshold * 0.5;
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float soft = clamp(br - u_threshold + knee, 0.0, 2.0 * knee);
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soft = soft * soft / (4.0 * knee + 1e-4);
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float contrib = max(soft, br - u_threshold) / max(br, 1e-4);
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col *= contrib;
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}
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o_color = vec4(sane(col), 1.0);
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}
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