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refactor(render3d): textures behind gpu.ludic, their sampler state recorded

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Texture creation, 2D and array uploads, pixel packing, filters, wraps, comparison, border,
anisotropy, mipmaps, texture units, read-backs and freeing now go through gpu_tex_* and
gpu_bind_sampler, and no other file names them. Each call is the one GL call it replaces,
in the same order, so OpenGL renders bit-identically at the fixed viewpoints and the game's
self-tests report what they did before.

What those calls say about a texture - size, format, layers, min and mag filter, wraps,
comparison, mipmaps, anisotropy - is recorded per handle as it is set: a backend with
immutable images and separate sampler objects creates both from exactly that.
r3d_bind_tex takes a texture kind (GPU_TEX2D / GPU_TEX2D_ARRAY) instead of a GL target.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-15 10:29:28 +03:00
parent 43c379aa0f
commit 4d3479d431
10 changed files with 201 additions and 113 deletions
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31
packages/ludic.render3d/terrain.ludic
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@ -203,21 +203,20 @@ function terrain_use_ortho(path: string) -> void {
ter_ortho_w = tex_w
ter_ortho_c = tex_channels
ter_ortho_tex = tex_upload(px, true, true)
gl_bind_texture(GL_TEXTURE_2D, ter_ortho_tex)
gl_tex_parameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)
gl_tex_parameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
gpu_tex_bind(GPU_TEX2D, ter_ortho_tex)
gpu_tex_param(GPU_TEX2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)
gpu_tex_param(GPU_TEX2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
}
function terrain_use_dem(path: string, emin: int, emax: int, base: int, ox: int, oz: int) -> void {
ter_dem_tex = tex_load(path, false)
ter_dem_min = emin; ter_dem_max = emax; ter_dem_base = base
ter_ox = ox; ter_oz = oz
gl_bind_texture(GL_TEXTURE_2D, ter_dem_tex)
gl_tex_parameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)
gl_tex_parameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
gpu_tex_bind(GPU_TEX2D, ter_dem_tex)
gpu_tex_param(GPU_TEX2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)
gpu_tex_param(GPU_TEX2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
}
function terrain_generate() -> void {
var ids0: words = null
var defs = ""
if ter_dem_tex != 0 { defs = "#define DEM\n" }
if ter_smooth { defs = "#define SMOOTH\n" }
@ -254,12 +253,12 @@ function terrain_generate() -> void {
u_f(gpu_uniform(pn, "u_half"), fi(TERRAIN_HALF))
mesh_draw(sky_fullscreen)
gl_delete_program(pn)
ids0 = gl_scratch(); ids0[0] = raw; gl_delete_textures(1, ids0)
gpu_tex_free(raw)
# read the heights back for placement
ter_heights = words(TERRAIN_RES * TERRAIN_RES)
gl_bind_texture(GL_TEXTURE_2D, ter_height_tex)
gl_pixel_storei(GL_PACK_ALIGNMENT, 4)
gl_get_tex_image(GL_TEXTURE_2D, 0, GL_RED, GL_FLOAT, ter_heights)
gpu_tex_bind(GPU_TEX2D, ter_height_tex)
gpu_pixel_store(GL_PACK_ALIGNMENT, 4)
gpu_tex_read(GPU_TEX2D, GL_RED, GL_FLOAT, ter_heights)
gl_bind_framebuffer(GL_FRAMEBUFFER, 0)
let ids = gl_scratch()
ids[0] = fbo
@ -480,8 +479,8 @@ function terrain_bind_prog(p: int) -> void {
# The ground reads its sun visibility out of the buffer tersun.frag filled, and has no
# use for the cascade array shadow_bind just put on this unit; leaving both bound under
# one unit is undefined ground, so the array comes off first.
gl_active_texture(GL_TEXTURE0 + 15)
gl_bind_texture(GL_TEXTURE_2D_ARRAY, 0)
gpu_tex_unit(15)
gpu_tex_bind(GPU_TEX2D_ARRAY, 0)
r3d_bind_2d(p, "u_sunshadow", 15, ter_sun_tex)
}
@ -765,9 +764,9 @@ function cdlod_select(level: int, ix: int, iz: int) -> bool {
# frame-sized targets and the shadow texture, whose size does not depend on the map.
function terrain_unload() -> void {
let ids = gl_scratch()
if ter_height_tex != 0 { ids[0] = ter_height_tex; gl_delete_textures(1, ids); ter_height_tex = 0 }
if ter_dem_tex != 0 { ids[0] = ter_dem_tex; gl_delete_textures(1, ids); ter_dem_tex = 0 }
if ter_ortho_tex != 0 { ids[0] = ter_ortho_tex; gl_delete_textures(1, ids); ter_ortho_tex = 0 }
if ter_height_tex != 0 { gpu_tex_free(ter_height_tex); ter_height_tex = 0 }
if ter_dem_tex != 0 { gpu_tex_free(ter_dem_tex); ter_dem_tex = 0 }
if ter_ortho_tex != 0 { gpu_tex_free(ter_ortho_tex); ter_ortho_tex = 0 }
if ter_heights != null { free(ter_heights); ter_heights = null }
if ter_ortho_px != null { free(ter_ortho_px); ter_ortho_px = null }
ter_ortho_w = 0