add code generation for assets

dub.json

@@ -24,6 +24,19 @@
 			"importPaths": ["src/packer", "src/shared"],
 			"sourcePaths": ["src/packer", "src/shared"],
 			"sourceFiles-linux": ["build/libxxhash.a"],
+			"preGenerateCommands-linux": ["./build-vma.sh"],
+			"preGenerateCommands-windows": [],
+		},
+		{
+			"name": "codegen",
+			"targetType": "executable",
+			"targetPath": "build",
+			"targetName": "Codegen",
+			"importPaths": ["src/codegen", "src/shared"],
+			"sourcePaths": ["src/codegen", "src/shared"],
+			"sourceFiles-linux": ["build/libxxhash.a"],
+			"preGenerateCommands-linux": ["./build-vma.sh"],
+			"preGenerateCommands-windows": [],
 		}
 	]
 }

src/codegen/codegen.d

@@ -0,0 +1,75 @@
+import aliases;
+import util;
+import std.stdio;
+import std.file;
+import std.string;
+import std.path;
+
+void
+main()
+{
+	CreateAssetLookups();
+}
+
+void
+CreateAssetLookups()
+{
+	try
+	{
+		mkdir("src/generated");
+	}
+	catch(Exception e) {}
+
+	string[] dirs;
+	string[][string] file_names;
+	string[][string] base_names;
+	u64[][string] file_hashes;
+
+	foreach(string dir; dirEntries("assets", SpanMode.shallow))
+	{
+		dirs ~= baseName(dir);
+	}
+
+	foreach(dir; dirs)
+	{
+		string[] files;
+		string[] names;
+		foreach(string file; dirEntries("assets/" ~ dir, SpanMode.shallow))
+		{
+			files ~= dir ~ "/" ~ baseName(file);
+			names ~= dir ~ "/" ~ baseName(stripExtension(file));
+		}
+
+		file_names[dir] = files;
+		base_names[dir] = names;
+	}
+
+	foreach(dir, names; base_names)
+	{
+		u64[] hashes;
+		foreach(name; names)
+		{
+			hashes ~= Hash(name);
+		}
+
+		file_hashes[dir] = hashes;
+	}
+
+	auto f = File("src/generated/assets.d", "w");
+
+	foreach(dir; dirs)
+	{
+		string asset_type = stripRight(dir, "s").toUpper();
+
+		string file_array = format("static immutable string[] %s_FILES = [\n", asset_type);
+		foreach(file; file_names[dir])
+		{
+			file_array ~= format("\t\"%s\",\n", file);
+		}
+		file_array ~= "];\n\n";
+
+		f.write(file_array);
+	}
+
+	f.close();
+}

src/generated/codegen.d

@@ -0,0 +1,24 @@
+static immutable string[] MODEL_FILES = [
+	"models/test_char.m3d",
+	"models/yoda.m3d",
+];
+
+static immutable string[] SHADER_FILES = [
+	"shaders/gui.frag.spv",
+	"shaders/pbr.frag.spv",
+	"shaders/gui.vert.spv",
+	"shaders/quad.frag.spv",
+	"shaders/quad.vert.spv",
+	"shaders/pbr.vert.spv",
+];
+
+static immutable string[] TEXTURE_FILES = [
+	"textures/ham_smoke.png",
+	"textures/cheesoid.png",
+	"textures/hog.jpg",
+	"textures/patamon.png",
+	"textures/pattermon.png",
+	"textures/hamster.png",
+	"textures/purplemon.png",
+];
+

src/packer/packer.d

@@ -1,7 +1,38 @@
-import std.stdio;
+import aliases;
+import std.file;
 import util;
+import assets;
+
+const u32 FILE_VERSION = 1;
 
 void main()
 {
-	Log("Hello, World!");
+	if (isDir("build"))
+	{
+		chdir("build");
+	}
+
+	static foreach(file; AssetFiles)
+	{
+		Log(file);
+	}
 }
+
+u32
+MagicValue(string str)
+{
+	assert(str.length == 4, "Magic value must 4 characters");
+	return cast(u32)(cast(u32)(str[0] << 24) | cast(u32)(str[1] << 16) | cast(u32)(str[2] << 8) | cast(u32)(str[3] << 0));
+}
+
+FileHeader
+InitHeader()
+{
+	FileHeader header = {
+		magic: MagicValue("steg"),
+		file_version: FILE_VERSION,
+	};
+
+	return header;
+}
+

src/shared/assets.d

@@ -0,0 +1,45 @@
+import aliases;
+import std.file;
+
+struct FileHeader
+{
+	u32 magic;
+	u32 file_version;
+	u64 asset_counts;
+	u64 asset_offset;
+}
+
+struct ModelMeta
+{
+	u64 index_count;
+}
+
+struct TexMeta
+{
+	u32 w;
+	u32 h;
+	u32 ch;
+}
+
+enum AssetType : u32
+{
+	None,
+	Shader,
+	Texture,
+	Model,
+}
+
+alias AT = AssetType;
+
+struct AssetInfo
+{
+	union
+	{
+		ModelMeta model;
+		TexMeta texture;
+	};
+	u64 hash;
+	u64 offset;
+	u64 len;
+	AssetType type;
+}