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refactor(render3d): programs, GPU timers and the context behind gpu.ludic

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The last of milestone 1: no OpenGL call is left in render3d outside gpu.ludic but the clock
and the CPU-side buffer helpers.

- gpu_program builds a program and remembers the variant it came from (vertex, fragment and
  defines as one line - the SPIR-V manifest's key), so a backend that cannot compile at run
  time finds the pipeline for the same handle. gpu_use_program and gpu_program_free replace
  32 uses and 2 frees; the overlay's program is recorded under overlay.vert|overlay.frag.
- gpu_query_new / _begin / _end / _result carry R3D_PROF's timers.
- gpu_open, gpu_vsync, gpu_renderer_name and gpu_resize_check carry the context.
- r3d_program_tess is gone: nothing called it and no tessellation shader exists.
- R3D_GLCHECK also checks after framebuffer and renderbuffer changes, viewport, draw buffers,
  program use, texture parameters, the resize check and between frames.

OpenGL frames are byte-identical at the five viewpoints; 59 self-tests pass with and without
R3D_GLCHECK, with no GL error; ludic-dev test 140 passed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-15 11:33:01 +03:00
parent 447acc11bd
commit ce3986bb02
12 changed files with 109 additions and 59 deletions
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12
packages/ludic.render3d/scatter.ludic
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@ -445,7 +445,7 @@ function impostor_bake(model: Model, tiles: int, tw: int, th: int) -> Impostor {
let hh = f_mul(model.height, F_HALF)
var bake = sc_bake_prog
if sc_bake_flower { bake = sc_bake_flower_prog }
gl_use_program(bake)
gpu_use_program(bake)
for t in 0 .. tiles {
let a = f_mul(f_mul(F_TWO, F_PI), fr(t, tiles))
v3_set(at, F_ZERO, cy, F_ZERO)
@ -772,7 +772,7 @@ function layer_draw_near(l: Layer, shadow: bool, light_vp: words, full: bool) ->
function layer_draw_model(l: Layer, model: Model, vb: int, cnt: int, card: bool, shadow: bool, light_vp: words) -> void {
if cnt == 0 { return }
let p = layer_program(l, shadow, card)
gl_use_program(p)
gpu_use_program(p)
# over the prepass: only the fragment the prepass kept, at exactly its depth (a texel
# it cut would otherwise pass LEQUAL over the terrain behind and draw the quad solid)
if p == sc_prog_fol_eq { gpu_depth_func(GL_EQUAL) }
@ -831,7 +831,7 @@ function layer_draw_far(l: Layer, shadow: bool, light_vp: words) -> void {
if l.n_far == 0 or l.imp == null { return }
var p = sc_imp_prog
if shadow { p = sc_imp_prog_shadow }
gl_use_program(p)
gpu_use_program(p)
let im = l.imp
u_f(gpu_uniform(p, "u_radius"), im.radius)
u_f(gpu_uniform(p, "u_height"), im.height)
@ -867,7 +867,7 @@ function layer_draw_far(l: Layer, shadow: bool, light_vp: words) -> void {
function layer_draw_shadow(l: Layer, light_vp: words) -> void {
if l.n_sh == 0 or l.imp == null { return }
let p = sc_imp_prog_shadow
gl_use_program(p)
gpu_use_program(p)
let im = l.imp
u_f(gpu_uniform(p, "u_radius"), im.radius)
u_f(gpu_uniform(p, "u_height"), im.height)
@ -891,7 +891,7 @@ var sc_skip_card: bool = false
function layer_draw_depth(l: Layer, model: Model, vb: int, cnt: int) -> void {
if cnt == 0 or model == null or vb == 0 { return }
let p = sc_prog_fol_depth
gl_use_program(p)
gpu_use_program(p)
var ground = F_ZERO
if l.grounded { ground = F_ONE }
u_f(gpu_uniform(p, "u_ground"), ground)
@ -1028,7 +1028,7 @@ function carpet_bake(layers: []Layer, count: int, tile: int, res: int) -> int {
m4_look_at(view, eye, at, up)
m4_ortho(proj, f_neg(half), half, f_neg(half), half, fl(0.1), fi(12))
let bake = sc_bake_card_prog
gl_use_program(bake)
gpu_use_program(bake)
u_mat4(gpu_uniform(bake, "u_view"), view)
u_mat4(gpu_uniform(bake, "u_proj"), proj)
u_f(gpu_uniform(bake, "u_wind"), F_ZERO)