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>
1.8 KiB
bump: patch
type: fix
Resizing the window (or entering fullscreen) no longer empties the world. It left
gl error 1286 — GL_INVALID_FRAMEBUFFER_OPERATION — on every frame from there on, with
the terrain, the trees, the grass and the water gone and only the sky drawn.
The sun-visibility pass added in changes/terrain-perf.md borrows the depth buffer the
frame is about to be drawn with, so that rasterising it doubles as a depth prepass. It
was storing that borrowed texture in its Target, and a Target deletes whatever its
depth names when it is freed. On the first resize the sequence was: post_free deletes
the frame's depth texture, post_init immediately makes the replacement — and GL hands
back the name that was just freed — and then the visibility target, rebuilt for the new
size, deleted that name believing it was its own. The scene framebuffer lost its depth
attachment. What is left is a colour-only framebuffer, which is complete, so drawing
carried on with no depth test at all: the sky is a fullscreen quad drawn last, and with
nothing left to fail against it painted over the entire valley. The 1286s came from the
passes whose own attachment now named a texture that no longer existed.
A borrowed attachment is never written into the target now, and the frame's depth is
attached afresh at the start of each pass — it is a different texture every time the
screen-sized buffers are rebuilt, and one glFramebufferTexture2D per pass is cheaper
than any scheme for noticing that it changed.
R3D_RESIZE_AT=<frame> rebuilds every screen-sized buffer from that frame on, cycling
through four drawable sizes every few frames. A window cannot be resized in a headless
run, so this is the only way to reach the path; it reproduced the fault in one frame and
now runs twenty resizes, with the fly camera and with the game, without an error.