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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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30
packages/ludic.render3d/shadow.ludic
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@ -21,18 +21,18 @@ var sh_corner: words = null
var sh_cascade: int = 0 # the cascade being rendered (for casters that skip far ones)
function shadow_init() -> void {
sh_tex = gl_texture()
gl_bind_texture(GL_TEXTURE_2D_ARRAY, sh_tex)
gl_tex_image3d(GL_TEXTURE_2D_ARRAY, 0, GL_DEPTH_COMPONENT32F, SHADOW_RES, SHADOW_RES, SHADOW_CASCADES, 0, GL_DEPTH_COMPONENT, GL_FLOAT, null)
gl_tex_parameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
gl_tex_parameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
gl_tex_parameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER)
gl_tex_parameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER)
gl_tex_parameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE)
gl_tex_parameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL)
sh_tex = gpu_tex_new()
gpu_tex_bind(GPU_TEX2D_ARRAY, sh_tex)
gpu_tex_image3d(GL_DEPTH_COMPONENT32F, SHADOW_RES, SHADOW_RES, SHADOW_CASCADES, GL_DEPTH_COMPONENT, GL_FLOAT, null)
gpu_tex_param(GPU_TEX2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
gpu_tex_param(GPU_TEX2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
gpu_tex_param(GPU_TEX2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER)
gpu_tex_param(GPU_TEX2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER)
gpu_tex_param(GPU_TEX2D_ARRAY, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE)
gpu_tex_param(GPU_TEX2D_ARRAY, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL)
let border = gl_floats(4)
gl_put(border, 0, 1.0); gl_put(border, 1, 1.0); gl_put(border, 2, 1.0); gl_put(border, 3, 1.0)
gl_tex_parameterfv(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BORDER_COLOR, border)
gpu_tex_border(GPU_TEX2D_ARRAY, border)
free(border)
sh_fbo = gl_framebuffer()
gl_bind_framebuffer(GL_FRAMEBUFFER, sh_fbo)
@ -175,10 +175,10 @@ var sh_probe_z: int = 0
function shadow_dump() -> void {
let n = SHADOW_RES * SHADOW_RES
let buf = words(n * SHADOW_CASCADES)
gl_bind_texture(GL_TEXTURE_2D_ARRAY, sh_tex)
gl_tex_parameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_COMPARE_MODE, GL_NONE)
gl_get_tex_image(GL_TEXTURE_2D_ARRAY, 0, GL_DEPTH_COMPONENT, GL_FLOAT, buf)
gl_tex_parameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE)
gpu_tex_bind(GPU_TEX2D_ARRAY, sh_tex)
gpu_tex_param(GPU_TEX2D_ARRAY, GL_TEXTURE_COMPARE_MODE, GL_NONE)
gpu_tex_read(GPU_TEX2D_ARRAY, GL_DEPTH_COMPONENT, GL_FLOAT, buf)
gpu_tex_param(GPU_TEX2D_ARRAY, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE)
if sh_probe_x != 0 {
let vp = shadow_cascade_vp(2)
let q = words(3)
@ -226,7 +226,7 @@ function sh_loc(prog: int, name: string) -> int {
return loc
}
function shadow_bind(prog: int) -> void {
r3d_bind_tex(prog, "u_shadow", 15, GL_TEXTURE_2D_ARRAY, sh_tex)
r3d_bind_tex(prog, "u_shadow", 15, GPU_TEX2D_ARRAY, sh_tex)
# the height-field shadow (terrain.ludic); a stand-in texture keeps the unit valid before the bake
var ts = ter_shadow_tex
var ts_on = F_ONE