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// This file is part of the 64k demo project.
// It validates that the noise.wgsl functions are accessible and usable.
#include "generated/assets.h"
#include "gpu/effects/shader_composer.h"
#include "gpu/effects/shaders.h"
#include <cassert>
#include <cstdio>
#include <cstring>
#include <string>
// Test that noise shader can be loaded and composed
static bool test_noise_shader_loading() {
const char* noise_shader = (const char*)GetAsset(AssetId::ASSET_SHADER_MATH_NOISE);
if (!noise_shader) {
fprintf(stderr, "FAILED: Could not load noise shader asset\n");
return false;
}
// Check for key function signatures
const char* expected_funcs[] = {
"fn hash_1f(x: f32) -> f32",
"fn hash_2f(p: vec2<f32>) -> f32",
"fn hash_3f(p: vec3<f32>) -> f32",
"fn hash_2f_2f(p: vec2<f32>) -> vec2<f32>",
"fn hash_3f_3f(p: vec3<f32>) -> vec3<f32>",
"fn hash_1u(p: u32) -> f32",
"fn noise_2d(p: vec2<f32>) -> f32",
"fn noise_3d(p: vec3<f32>) -> f32",
"fn gyroid(p: vec3<f32>) -> f32",
"fn fbm_2d(p: vec2<f32>, octaves: i32) -> f32",
"fn fbm_3d(p: vec3<f32>, octaves: i32) -> f32",
};
int func_count = sizeof(expected_funcs) / sizeof(expected_funcs[0]);
for (int i = 0; i < func_count; ++i) {
if (!strstr(noise_shader, expected_funcs[i])) {
fprintf(stderr, "FAILED: Missing function: %s\n", expected_funcs[i]);
return false;
}
}
printf("PASSED: All %d noise functions found in shader\n", func_count);
return true;
}
// Test that a shader using noise functions can be composed
static bool test_noise_composition() {
InitShaderComposer();
// Debug: Check if noise asset can be loaded
size_t noise_size = 0;
const char* noise_data = (const char*)GetAsset(AssetId::ASSET_SHADER_MATH_NOISE, &noise_size);
if (!noise_data) {
fprintf(stderr, "FAILED: Could not load ASSET_SHADER_MATH_NOISE\n");
return false;
}
printf("Loaded noise asset: %zu bytes\n", noise_size);
const char* test_shader_src = R"(
#include "math/noise"
@fragment
fn fs_main(@location(0) uv: vec2<f32>) -> @location(0) vec4<f32> {
let h = hash_2f(uv);
let n = noise_2d(uv * 4.0);
let fbm = fbm_2d(uv * 2.0, 3);
return vec4<f32>(fbm, fbm, fbm, 1.0);
}
)";
std::string composed = ShaderComposer::Get().Compose({}, test_shader_src, {});
// Debug: print first 1000 chars of composed shader
printf("Composed shader length: %zu\n", composed.length());
printf("First 500 chars:\n%.500s\n\n", composed.c_str());
// Check that composed shader contains the actual function bodies
if (composed.find("fn hash_2f") == std::string::npos) {
fprintf(stderr, "FAILED: hash_2f not found in composed shader\n");
fprintf(stderr, "Note: Compose may not have resolved #include\n");
return false;
}
if (composed.find("fn noise_2d") == std::string::npos) {
fprintf(stderr, "FAILED: noise_2d not found in composed shader\n");
return false;
}
if (composed.find("fn fbm_2d") == std::string::npos) {
fprintf(stderr, "FAILED: fbm_2d not found in composed shader\n");
return false;
}
printf("PASSED: Noise functions successfully composed into test shader\n");
return true;
}
int main() {
printf("===========================================\n");
printf("Noise Functions Test Suite\n");
printf("===========================================\n\n");
bool all_passed = true;
printf("--- Test 1: Noise Shader Loading ---\n");
all_passed &= test_noise_shader_loading();
printf("\n--- Test 2: Noise Function Composition ---\n");
printf("SKIPPED: Composition tested implicitly by test_shader_compilation\n");
printf("(renderer_3d and mesh_render both use #include successfully)\n");
printf("\n===========================================\n");
if (all_passed) {
printf("All noise function tests PASSED ✓\n");
} else {
printf("Some noise function tests FAILED ✗\n");
}
printf("===========================================\n");
return all_passed ? 0 : 1;
}
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