92 lines
3.9 KiB
C++
92 lines
3.9 KiB
C++
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import std;
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import Crafter.Build;
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namespace fs = std::filesystem;
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using namespace Crafter;
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// Sponza geometry + albedo: CC BY 3.0, Frank Meinl (Crytek), packaged by
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// Jimmie Bergmann (https://github.com/jimmiebergmann/Sponza) and Morgan
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// McGuire (https://casual-effects.com/data). The full asset bundle is
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// ~280 MB — too large to live in this repo. GitFetch lands it in the
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// per-user crafter-build cache on first build and reuses thereafter.
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constexpr std::string_view kSponzaGitUrl = "https://github.com/jimmiebergmann/Sponza.git";
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constexpr std::string_view kSponzaCommitSHA = "222338979d32f4f4818466291bdbc29f192b86ba";
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// Every albedo is normalized to this size so they can live as layers of
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// one texture_2d_array on the GPU (WebGPU array textures require
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// identical layer dimensions). 1024 matches the majority of Sponza's
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// textures; the few outliers (256×1024 chain, 512² thorn, 2048² curtains)
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// get bilinear-resized via stb_image_resize2.
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constexpr std::uint16_t kAlbedoSize = 1024u;
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extern "C" Configuration CrafterBuildProject(std::span<const std::string_view> args) {
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bool isWasm = false;
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for (std::string_view a : args) {
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if (a.starts_with("--target=") && a.find("wasm") != std::string_view::npos) {
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isWasm = true;
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break;
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}
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}
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std::vector<std::string> graphicsArgs(args.begin(), args.end());
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Configuration* graphics = LocalProject({
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.projectFile = "../../project.cpp",
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.args = graphicsArgs,
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});
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Configuration cfg;
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cfg.path = "./";
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cfg.name = "Sponza";
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cfg.outputName = "Sponza";
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cfg.type = ConfigurationType::Executable;
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if (isWasm) {
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cfg.target = "wasm32-wasip1";
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cfg.defines.push_back({"CRAFTER_GRAPHICS_WINDOW_DOM", ""});
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cfg.compileFlags.push_back("-msimd128");
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}
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ApplyStandardArgs(cfg, args);
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cfg.dependencies = { graphics };
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std::array<fs::path, 0> ifaces = {};
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std::array<fs::path, 1> impls = { "main" };
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cfg.GetInterfacesAndImplementations(ifaces, impls);
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// Fetch Sponza once into the shared crafter-build cache, then process
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// it into a per-material bundle under build/sponza-bundle-<hash>/.
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// Hashing on (sha, albedoSize) so changing either invalidates the
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// bundle without touching the rest of the example's build tree.
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fs::path sponzaRoot = GitFetch({
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.url = std::string(kSponzaGitUrl),
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.commit = std::string(kSponzaCommitSHA),
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});
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std::string bundleKey = std::format("{}|{}", kSponzaCommitSHA, kAlbedoSize);
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auto bundleHash = std::hash<std::string>{}(bundleKey);
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fs::path bundleDir = fs::path("build") / std::format("sponza-bundle-{:016x}", bundleHash);
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if (auto err = BuildOBJBundle(
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sponzaRoot / "sponza.obj",
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sponzaRoot / "sponza.mtl",
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bundleDir,
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kAlbedoSize); !err.empty()) {
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std::println(std::cerr, "Sponza bundle error: {}", err);
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std::exit(1);
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}
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// Forward every produced file (.cmesh, .ctex, scene.txt) as a
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// passthrough — they're already compressed by Crafter.Asset, no
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// further compression needed. cfg.files copies them flat into
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// the executable's bin dir.
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for (const auto& entry : fs::directory_iterator(bundleDir)) {
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if (entry.is_regular_file()) cfg.files.push_back(entry.path());
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}
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if (isWasm) {
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cfg.files.emplace_back(fs::path("raygen.wgsl"));
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cfg.files.emplace_back(fs::path("closesthit.wgsl"));
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cfg.files.emplace_back(fs::path("miss.wgsl"));
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EnableWasiBrowserRuntime(cfg);
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} else {
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cfg.shaders.emplace_back(fs::path("raygen.glsl"), std::string("main"), ShaderType::RayGen);
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cfg.shaders.emplace_back(fs::path("closesthit.glsl"), std::string("main"), ShaderType::ClosestHit);
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cfg.shaders.emplace_back(fs::path("miss.glsl"), std::string("main"), ShaderType::Miss);
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}
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return cfg;
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}
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