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# doom-wad-php
Small PHP toolkit for reading Doom WAD files and rendering patch/texture graphics.
It currently focuses on the graphics side of classic Doom data:
- WAD header + lump directory parsing
- Doom patch (`Picture`) parsing
- `TEXTURE1` / `TEXTURE2` (`TextureX`) parsing
- `PNAMES` parsing
- Texture resolution (`TEXTUREX + PNAMES + patch lumps`)
- PNG rendering through `intervention/image`
## Requirements
- PHP 8.2+
- Composer
## Install
```bash
composer install
```
## Run tests
```bash
composer test
```
## Quick start
### 1) Parse a WAD
```php
<?php
require_once 'vendor/autoload.php';
use Doom\Wad\File as WadFile;
use Shufflingpixels\IO\BinaryReader;
use Shufflingpixels\IO\File;
use Shufflingpixels\IO\FileMode;
$file = File::open('./data/test.wad', FileMode::READ);
$wad = WadFile::parse(BinaryReader::stream($file));
```
### 2) Render a single patch lump to PNG
```php
use Doom\Image\Renderer;
$renderer = new Renderer();
$pictureRenderer = $renderer->createPicture();
$patch = $wad->firstLumpByName('S3DUMMY');
if ($patch !== null) {
$pictureRenderer->render($patch->asPicture())->save('output/S3DUMMY.png');
}
```
### 3) Resolve and render composite textures
```php
use Doom\Image\Renderer;
$renderer = new Renderer();
$textures = $wad->resolveTextures();
foreach ($textures as $texture) {
$canvas = $renderer->createTexture($texture->width, $texture->height);
foreach ($texture->patches as $patch) {
if ($patch->patchName === null) {
continue;
}
$path = sprintf('output/patches/%s.png', $patch->patchName);
if (is_file($path)) {
$canvas->blit($path, $patch->originX, $patch->originY);
}
}
$canvas->image()->save(sprintf('output/textures/%s.png', $texture->name));
}
```
For a full runnable example, see `test.php`.
## Main API
- `Doom\Wad\File::parse(...)`
- `Doom\Wad\File::firstLumpByName(...)`
- `Doom\Wad\File::pNames()`
- `Doom\Wad\File::resolveTextures()`
- `Doom\Wad\Types\Lump::asPicture()`
- `Doom\Wad\Types\Lump::asTextureX()`
- `Doom\Image\Renderer`
- `createPicture()` -> `Doom\Image\PictureRenderer`
- `createTexture($width, $height)` -> `Doom\Image\TextureRenderer`
## Notes
- Rendering is palette-index based (Doom 8-bit graphics model).
- The default Doom palette is built in, and custom palettes are supported via `Doom\Picture\Palette`.
## References
- [Doom source code](https://github.com/id-Software/DOOM)
- [Doom Wiki](https://doomwiki.org)
- [Unofficial Doom specs](https://www.gamers.org/dhs/helpdocs/dmsp1666.html)
- [SLADE 3](https://github.com/sirjuddington/SLADE)

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{
"name": "pnx/doom-wad-php",
"version": "0.0.1",
"type": "library",
"authors": [
{
"name": "Henrik Hautakoski",
"email": "henrik.hautakoski@gmail.com"
}
],
"autoload": {
"psr-4" : {
"Doom\\": "src/"
}
},
"require-dev": {
"pestphp/pest": "^4.6"
},
"scripts": {
"test": "pest"
},
"config": {
"allow-plugins": {
"pestphp/pest-plugin": true
}
},
"require": {
"illuminate/collections": "^10.0",
"shufflingpixels/php-io": "dev-main",
"intervention/image": "^4.0"
},
"minimum-stability": "dev"
}

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<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
bootstrap="vendor/autoload.php"
colors="true"
>
<testsuites>
<testsuite name="Test Suite">
<directory suffix="Test.php">./tests</directory>
</testsuite>
</testsuites>
<source>
<include>
<directory>src</directory>
</include>
</source>
</phpunit>

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<?php
namespace Doom\Image;
use Doom\Picture\Palette;
use Doom\Picture\Picture;
use Intervention\Image\ImageManager;
use Intervention\Image\Interfaces\ImageInterface;
final class PictureRenderer
{
public function __construct(
private ImageManager $manager,
private Palette $palette,
)
{
}
public function render(Picture $picture): ImageInterface
{
$image = $this->manager->createImage($picture->width, $picture->height);
$image->fill('rgba(0,0,0,0)');
$colorCache = ['transparent' => 'rgba(0, 0, 0, 0)'];
foreach ($picture->posts as $x => $columnPosts) {
if (!\is_int($x) || $x < 0 || $x >= $picture->width) {
continue;
}
foreach ($columnPosts as $post) {
$y = $post['y'];
$pixels = $post['pixels'];
foreach ($pixels as $offset => $pixelIndex) {
$pixelY = $y + $offset;
if ($pixelY < 0 || $pixelY >= $picture->height) {
continue;
}
$paletteIndex = $pixelIndex & 0xFF;
if (!isset($colorCache[$paletteIndex])) {
[$r, $g, $b] = $this->palette->colorAt($paletteIndex);
$colorCache[$paletteIndex] = sprintf('rgb(%d, %d, %d)', $r, $g, $b);
}
$image->drawPixel($x, $pixelY, $colorCache[$paletteIndex]);
}
}
}
return $image;
}
}

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<?php
namespace Doom\Image;
use Doom\Picture\DoomPalette;
use Doom\Picture\Palette;
use Intervention\Image\Drivers\Gd\Driver as GD;
use Intervention\Image\ImageManager;
use Intervention\Image\Interfaces\ImageInterface;
final class Renderer
{
private ImageManager $manager;
private Palette $palette;
public function __construct(Palette|array|null $palette = null)
{
if (is_array($palette)) {
$palette = new Palette($palette);
}
$this->palette = $palette ?? DoomPalette::default();
$this->manager = new ImageManager(new GD());
}
public function create(int $width, int $height): ImageInterface
{
$image = $this->manager->createImage($width, $height);
$image->fill('rgba(0, 0, 0, 0)');
return $image;
}
public function createPicture(): PictureRenderer
{
return new PictureRenderer($this->manager, $this->palette);
}
public function createTexture(int $width, int $height): TextureRenderer
{
return new TextureRenderer($this, $this->createPicture(), $width, $height);
}
}

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<?php
namespace Doom\Image;
use Doom\Picture\Picture;
use Intervention\Image\Interfaces\ImageInterface;
use InvalidArgumentException;
use RuntimeException;
final class TextureRenderer
{
protected ImageInterface $image;
public function __construct(
private Renderer $renderer,
private PictureRenderer $pictureRenderer,
int $width, int $height
) {
if ($width <= 0 || $height <= 0) {
throw new InvalidArgumentException('Texture dimensions must be greater than zero.');
}
$this->image = $renderer->create($width, $height);
}
public function blit(Picture|string $source, int $x = 0, int $y = 0): self
{
if (\is_string($source) && !is_file($source)) {
throw new RuntimeException("Unable to blit texture source file: {$source}");
}
$image = $source instanceof Picture ? $this->pictureRenderer->render($source) : $source;
$this->image->insert($image, $x, $y);
return $this;
}
public function image() : ImageInterface
{
return $this->image;
}
}

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<?php
namespace Doom\Picture;
use InvalidArgumentException;
use RuntimeException;
final class DoomPalette
{
private const DEFAULT_HEX =
'0000001f170b170f074b4b4bffffff1b1b1b1313130b0b0b0707072f371f232b0f171f070f17004f3b2b4733233f2b1b' .
'ffb7b7f7ababf3a3a3eb9797e78f8fdf8787db7b7bd37373cb6b6bc76363bf5b5bbb5757b34f4faf4747a73f3fa33b3b' .
'9b3333972f2f8f2b2b8b2323831f1f7f1b1b7717177313136b0f0f670b0b5f07075b07075307074f0000470000430000' .
'ffebdfffe3d3ffdbc7ffd3bbffcfb3ffc7a7ffbf9bffbb93ffb383f7ab7befa373e79b6bdf9363d78b5bcf8353cb7f4f' .
'bf7b4bb37347ab6f43a36b3f9b633b8f5f378757337f532f774f2b6b47275f4323533f1f4b371b3f2f17332b132b230f' .
'efefefe7e7e7dfdfdfdbdbdbd3d3d3cbcbcbc7c7c7bfbfbfb7b7b7b3b3b3abababa7a7a79f9f9f9797979393938b8b8b' .
'8383837f7f7f7777776f6f6f6b6b6b6363635b5b5b5757574f4f4f4747474343433b3b3b3737372f2f2f272727232323' .
'77ff6f6fef6767df5f5fcf575bbf4f53af474b9f3f4393373f832f37732b2f632327531b1f431717330f13230b0b1707' .
'bfa78fb79f87af977fa78f779f876f9b7f6b937b638b735b836b577b634f775f4b6f574367533f5f4b37574333533f2f' .
'9f83638f7753836b4b775f3f6753335b472b4f3b2343331b7b7f636f7357676b4f5b634753573b474f333f472b373f27' .
'ffff73ebdb57d7bb43c39b2faf7b1f9b5b13874307732b00ffffffffdbdbffbbbbff9b9bff7b7bff5f5fff3f3fff1f1f' .
'ff0000ef0000e30000d70000cb0000bf0000b30000a700009b00008b00007f00007300006700005b00004f0000430000' .
'e7e7ffc7c7ffababff8f8fff7373ff5353ff3737ff1b1bff0000ff0000e30000cb0000b300009b00008300006b000053' .
'ffffffffebdbffd7bbffc79bffb37bffa35bff8f3bff7f1bf37317eb6f0fdf670fd75f0bcb5707c34f00b74700af4300' .
'ffffffffffd7ffffb3ffff8fffff6bffff47ffff23ffff00a73f009f3700932f008723004f3b27432f1b3723132f1b0b' .
'00005300004700003b00002f00002300001700000b000000ff9f43ffe74bff7bffff00ffcf00cf9f009b6f006ba76b6b';
private static ?Palette $default = null;
public static function default(): Palette
{
if (self::$default === null) {
$bytes = hex2bin(self::DEFAULT_HEX);
if ($bytes === false) {
throw new RuntimeException('Failed to decode default palette bytes.');
}
self::$default = Palette::fromBytes($bytes);
}
return self::$default;
}
public static function fromPlaypal(string $playpalData, int $paletteIndex = 0): Palette
{
if ($paletteIndex < 0) {
throw new InvalidArgumentException('Palette index must be >= 0.');
}
$offset = $paletteIndex * Palette::PALETTE_BYTES;
if (strlen($playpalData) < ($offset + Palette::PALETTE_BYTES)) {
throw new RuntimeException('PLAYPAL data does not include requested palette index.');
}
$paletteBytes = substr($playpalData, $offset, Palette::PALETTE_BYTES);
return Palette::fromBytes($paletteBytes);
}
}

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<?php
namespace Doom\Picture;
use Illuminate\Contracts\Support\Arrayable;
use InvalidArgumentException;
use function chr, ord, count;
final class Palette implements \ArrayAccess, Arrayable
{
public const int COLORS = 256;
public const int BYTES_PER_COLOR = 3;
public const int PALETTE_BYTES = self::COLORS * self::BYTES_PER_COLOR;
/** @var array<int, array{0:int,1:int,2:int}> */
private array $colors;
/**
* @param array<int, array{0:int,1:int,2:int}> $colors
*/
public function __construct(array $colors)
{
$this->colors = array_values($colors);
$this->valid();
}
public static function fromBytes(string $bytes): self
{
if (\strlen($bytes) !== self::PALETTE_BYTES) {
throw new InvalidArgumentException('Palette data must be exactly 768 bytes.');
}
$colors = [];
for ($i = 0; $i < self::COLORS; $i++) {
$base = $i * self::BYTES_PER_COLOR;
$colors[$i] = [
ord($bytes[$base]),
ord($bytes[$base + 1]),
ord($bytes[$base + 2]),
];
}
return new self($colors);
}
/**
* @return array{0:int,1:int,2:int}
*/
public function colorAt(int $index): array
{
if (!isset($this->colors[$index])) {
throw new InvalidArgumentException("Palette color index {$index} is out of bounds.");
}
return $this->colors[$index];
}
/**
* @return array<int, array{0:int,1:int,2:int}>
*/
public function toArray(): array
{
return $this->colors;
}
public function toBytes(): string
{
$bytes = '';
foreach ($this->colors as [$r, $g, $b]) {
$bytes .= chr($r) . chr($g) . chr($b);
}
return $bytes;
}
public function valid(): void
{
if (count($this->colors) !== self::COLORS) {
throw new InvalidArgumentException('Palette must contain exactly 256 colors.');
}
foreach ($this->colors as $index => $rgb) {
if (!\is_array($rgb) || \count($rgb) !== 3) {
throw new InvalidArgumentException("Palette color at index {$index} must be an RGB triplet.");
}
foreach ($rgb as $channel) {
if (!\is_int($channel) || $channel < 0 || $channel > 255) {
throw new InvalidArgumentException("Palette channel at index {$index} must be an int in range 0..255.");
}
}
}
}
public function offsetExists($offset)
{
return $offset >= 0 && $offset < self::COLORS;
}
public function offsetGet($offset)
{
return $this->colors[$offset];
}
public function offsetSet($offset, $value)
{
$this->colors[$offset] = $value;
}
public function offsetUnset($offset)
{
$this->colors[$offset] = [0, 0, 0];
}
}

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<?php
namespace Doom\Picture;
/**
* This is doom's internal Image format called "Picture"
*/
final class Picture
{
/**
* @param array<int, array<int, array{y: int, topdelta: int, pixels: int[]}>> $posts
*/
public function __construct(
public readonly int $width,
public readonly int $height,
public readonly int $left,
public readonly int $top,
public readonly array $posts
) {}
}

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<?php
namespace Doom\Picture;
use InvalidArgumentException;
use RuntimeException;
use Shufflingpixels\IO\BinaryReader;
final class PictureParser
{
public static function parseBytes(string $data): Picture
{
return self::parse(BinaryReader::string($data));
}
public static function parse(BinaryReader $reader): Picture
{
if ($reader->length() < 8) {
throw new InvalidArgumentException('Picture lump is too small.');
}
$width = $reader->readUInt16LE();
$height = $reader->readUInt16LE();
$left = $reader->readInt16LE();
$top = $reader->readInt16LE();
if ($width <= 0 || $height <= 0) {
throw new InvalidArgumentException('Picture dimensions must be greater than zero.');
}
$columnDirectoryBytes = $width * 4;
$columnOffsets = [];
for ($x = 0; $x < $width; $x++) {
$columnOffsets[] = $reader->readUInt32LE();
}
$headerSize = 8 + $columnDirectoryBytes;
$posts = [];
for ($x = 0; $x < $width; $x++) {
$offset = $columnOffsets[$x];
if ($offset < $headerSize || $offset >= $reader->length()) {
throw new RuntimeException("Invalid column offset {$offset} for column {$x}.");
}
$reader->seek($offset);
$columnPosts = [];
$previousY = -1;
while (true) {
if ($reader->eof()) {
throw new RuntimeException("Missing column terminator for column {$x}.");
}
$topDelta = $reader->readUInt8();
if ($topDelta === 0xFF) {
break;
}
$length = $reader->readUInt8();
$reader->readUInt8();
$pixels = [];
for ($i = 0; $i < $length; $i++) {
$pixels[] = $reader->readUInt8();
}
$reader->readUInt8();
$y = $topDelta;
if ($previousY !== -1 && $topDelta <= $previousY) {
$y = $previousY + 1 + $topDelta;
}
$previousY = $y;
$columnPosts[] = [
'y' => $y,
'topdelta' => $topDelta,
'pixels' => $pixels,
];
}
$posts[$x] = $columnPosts;
}
return new Picture($width, $height, $left, $top, $posts);
}
}

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<?php
namespace Doom\Texture;
use RuntimeException;
use Shufflingpixels\IO\BinaryReader;
final class PNamesParser
{
/**
* @return string[]
*/
public static function parseBytes(string $data): array
{
return self::parse(BinaryReader::string($data));
}
/**
* @return string[]
*/
public static function parse(BinaryReader $reader): array
{
if ($reader->length() < 4) {
throw new RuntimeException('PNAMES lump is too small.');
}
$count = $reader->readUInt32LE();
$requiredBytes = 4 + ($count * 8);
if ($requiredBytes > $reader->length()) {
throw new RuntimeException('PNAMES lump is truncated.');
}
$names = [];
for ($i = 0; $i < $count; $i++) {
$names[] = strtoupper(rtrim($reader->read(8), "\0 "));
}
return $names;
}
}

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<?php
namespace Doom\Texture;
final class Patch
{
public function __construct(
public readonly int $originX,
public readonly int $originY,
public readonly int $patch,
public readonly int $stepDir,
public readonly int $colorMap,
) {}
}

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<?php
namespace Doom\Texture;
final class ResolvedTexture
{
/**
* @param ResolvedTexturePatch[] $patches
*/
public function __construct(
public readonly string $name,
public readonly bool $masked,
public readonly int $width,
public readonly int $height,
public readonly array $patches,
) {}
}

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<?php
namespace Doom\Texture;
final class ResolvedTexturePatch
{
public function __construct(
public readonly int $originX,
public readonly int $originY,
public readonly int $patchIndex,
public readonly ?string $patchName,
public readonly int $stepDir,
public readonly int $colorMap,
public readonly ?int $lumpIndex,
) {}
public function isResolved(): bool
{
return $this->patchName !== null && $this->lumpIndex !== null;
}
}

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<?php
namespace Doom\Texture;
final class TextureDefinition
{
/**
* @param Patch[] $patches
*/
public function __construct(
public readonly string $name,
public readonly bool $masked,
public readonly int $width,
public readonly int $height,
public readonly int $columnDirectory,
public readonly array $patches,
) {}
}

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<?php
namespace Doom\Texture;
use Doom\Wad\File;
use RuntimeException;
final class TextureResolver
{
private function __construct(private readonly File $wad)
{
}
public static function forWad(File $wad): self
{
return new self($wad);
}
/**
* @param string[] $textureLumpNames
* @return array<string, ResolvedTexture>
*/
public function resolveAll(array $textureLumpNames = ['TEXTURE1', 'TEXTURE2']): array
{
$pNames = $this->wad->pNames();
if ($pNames === null) {
throw new RuntimeException('Missing PNAMES lump.');
}
$resolved = [];
foreach ($textureLumpNames as $textureLumpName) {
$textureX = $this->wad->firstTextureXByName($textureLumpName);
if ($textureX === null) {
continue;
}
foreach ($textureX->textures as $texture) {
$resolved[$texture->name] = $this->resolveTexture($texture, $pNames);
}
}
return $resolved;
}
public function resolveByName(string $textureName, array $textureLumpNames = ['TEXTURE1', 'TEXTURE2']): ?ResolvedTexture
{
$textureName = strtoupper($textureName);
$resolved = $this->resolveAll($textureLumpNames);
return $resolved[$textureName] ?? null;
}
/**
* @param string[] $pNames
*/
private function resolveTexture(TextureDefinition $texture, array $pNames): ResolvedTexture
{
$patches = [];
foreach ($texture->patches as $patch) {
$patchName = $pNames[$patch->patch] ?? null;
$patchLump = $patchName === null ? null : $this->wad->firstLumpByName($patchName);
$patches[] = new ResolvedTexturePatch(
originX: $patch->originX,
originY: $patch->originY,
patchIndex: $patch->patch,
patchName: $patchName,
stepDir: $patch->stepDir,
colorMap: $patch->colorMap,
lumpIndex: $patchLump?->index,
);
}
return new ResolvedTexture(
name: $texture->name,
masked: $texture->masked,
width: $texture->width,
height: $texture->height,
patches: $patches,
);
}
}

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<?php
namespace Doom\Texture;
final class TextureX
{
/**
* @param int[] $offsets
* @param TextureDefinition[] $textures
*/
public function __construct(
public readonly int $numTextures,
public readonly array $offsets,
public readonly array $textures,
) {}
public function firstTextureByName(string $name): ?TextureDefinition
{
$name = strtoupper($name);
foreach ($this->textures as $texture) {
if ($texture->name === $name) {
return $texture;
}
}
return null;
}
}

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<?php
namespace Doom\Texture;
use RuntimeException;
use Shufflingpixels\IO\BinaryReader;
final class TextureXParser
{
public static function parseBytes(string $data): TextureX
{
return self::parse(BinaryReader::string($data));
}
public static function parse(BinaryReader $reader): TextureX
{
if ($reader->length() < 4) {
throw new RuntimeException('TEXTUREX lump is too small.');
}
$numTextures = $reader->readUInt32LE();
$offsets = [];
for ($i = 0; $i < $numTextures; $i++) {
$offsets[] = $reader->readUInt32LE();
}
$textures = [];
$minimumOffset = 4 + ($numTextures * 4);
for ($i = 0; $i < $numTextures; $i++) {
$offset = $offsets[$i];
if ($offset < $minimumOffset || $offset >= $reader->length()) {
throw new RuntimeException("Invalid texture offset {$offset} at index {$i}.");
}
$reader->seek($offset);
$name = strtoupper(rtrim($reader->read(8), "\0 "));
$masked = $reader->readUInt32LE() !== 0;
$width = $reader->readUInt16LE();
$height = $reader->readUInt16LE();
$columnDirectory = $reader->readUInt32LE();
$patchCount = $reader->readUInt16LE();
$patches = [];
for ($patchIndex = 0; $patchIndex < $patchCount; $patchIndex++) {
$patches[] = new Patch(
originX: $reader->readInt16LE(),
originY: $reader->readInt16LE(),
patch: $reader->readUInt16LE(),
stepDir: $reader->readUInt16LE(),
colorMap: $reader->readUInt16LE(),
);
}
$textures[] = new TextureDefinition(
name: $name,
masked: $masked,
width: $width,
height: $height,
columnDirectory: $columnDirectory,
patches: $patches,
);
}
return new TextureX($numTextures, $offsets, $textures);
}
}

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<?php
namespace Doom\Wad\Exception;
class Exception extends \Exception
{
}

7
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<?php
namespace Doom\Wad\Exception;
class InvalidWadException extends Exception
{
}

96
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<?php
namespace Doom\Wad;
use Doom\Picture\Picture;
use Doom\Texture\ResolvedTexture;
use Doom\Texture\TextureX;
use Doom\Texture\TextureResolver;
use Doom\Wad\Types\Header;
use Doom\Wad\Types\Lump;
use Illuminate\Support\Collection;
use OutOfBoundsException;
use Shufflingpixels\IO\BinaryReader;
final class File
{
public Header $header;
/** @var Collection<Lump> */
public Collection $lumps;
public function __construct()
{
$this->lumps = new Collection();
}
public function header(): Header
{
return $this->header;
}
/**
* @return Collection<Lump>
*/
public function lumps(): Collection
{
return $this->lumps;
}
public function lump(int $index): Lump
{
if (!isset($this->lumps[$index])) {
throw new OutOfBoundsException("Lump index {$index} does not exist.");
}
return $this->lumps[$index];
}
public function firstLumpByName(string $name): ?Lump
{
$name = strtoupper($name);
return $this->lumps->first(fn (Lump $item) => $item->name === $name);
}
/**
* @return Collection<Lump>
*/
public function lumpsByName(string $name): Collection
{
$name = strtoupper($name);
return $this->lumps->filter(fn (Lump $item) => $item->name === $name);
}
public function firstPictureByName(string $name): ?Picture
{
return $this->firstLumpByName($name)?->asPicture();
}
public function firstTextureXByName(string $name): ?TextureX
{
return $this->firstLumpByName($name)?->asTextureX();
}
/**
* @return string[]|null
*/
public function pNames(): ?array
{
return $this->firstLumpByName('PNAMES')?->asPNames();
}
/**
* @param string[] $textureLumpNames
* @return array<string, ResolvedTexture>
*/
public function resolveTextures(array $textureLumpNames = ['TEXTURE1', 'TEXTURE2']): array
{
return TextureResolver::forWad($this)->resolveAll($textureLumpNames);
}
public static function parse(BinaryReader $reader): self
{
return (new Parser($reader))->parse();
}
}

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<?php
namespace Doom\Wad;
use Doom\Wad\Exception\InvalidWadException;
use Doom\Wad\Types\Header;
use Doom\Wad\Types\Lump;
use OutOfBoundsException;
use Shufflingpixels\IO\BinaryReader;
class Parser
{
public function __construct(protected BinaryReader $reader)
{
}
public function parse() : File
{
$obj = new File();
if ($this->reader->length() < 12) {
throw new InvalidWadException('File too small to be a valid WAD.');
}
$type = $this->reader->read(4);
if ($type !== 'IWAD' && $type !== 'PWAD') {
throw new InvalidWadException("Invalid WAD type: {$type}");
}
$lumpCount = $this->reader->readUInt32LE();
$directoryOffset = $this->reader->readUInt32LE();
$obj->header = new Header($type, $lumpCount, $directoryOffset);
$directorySize = $lumpCount * 16;
if ($directoryOffset + $directorySize > $this->reader->length()) {
throw new OutOfBoundsException('Directory exceeds file bounds.');
}
$this->reader->seek($directoryOffset);
for ($i = 0; $i < $lumpCount; $i++) {
$lumpOffset = $this->reader->readUInt32LE();
$lumpSize = $this->reader->readUInt32LE();
$rawName = $this->reader->read(8);
$name = strtoupper(rtrim($rawName, "\0 "));
if ($lumpSize < 0) {
throw new InvalidWadException("Invalid lump size at index {$i}.");
}
if ($lumpSize === 0) {
$data = '';
} else {
$pos = $this->reader->tell();
$this->reader->seek($lumpOffset);
$data = $this->reader->read($lumpSize);
$this->reader->seek($pos);
}
$obj->lumps[] = new Lump(
offset: $lumpOffset,
size: $lumpSize,
name: $name,
data: $data,
index: $i,
);
}
return $obj;
}
}

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<?php
namespace Doom\Wad\Types;
final class Header
{
public function __construct(
public readonly string $type,
public readonly int $lump_count,
public readonly int $directory_offset,
) {}
}

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<?php
namespace Doom\Wad\Types;
use Doom\Picture\Picture;
use Doom\Picture\PictureParser;
use Doom\Texture\PNamesParser;
use Doom\Texture\TextureX;
use Doom\Texture\TextureXParser;
final class Lump
{
public function __construct(
public readonly int $offset,
public readonly int $size,
public readonly string $name,
private readonly string $data,
public readonly int $index,
) {}
public function data(): string
{
return $this->data;
}
public function asPicture(): Picture
{
return PictureParser::parseBytes($this->data);
}
public function asTextureX(): TextureX
{
return TextureXParser::parseBytes($this->data);
}
/**
* @return string[]
*/
public function asPNames(): array
{
return PNamesParser::parseBytes($this->data);
}
}

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<?php
namespace Doom\Wad;
enum WadType : string
{
case IWAD = "IWAD";
case PWAD = "PWAD";
}

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<?php
require_once 'vendor/autoload.php';
use Doom\Image\Renderer;
use Doom\Wad\File as WadFile;
use Shufflingpixels\IO\BinaryReader;
use Shufflingpixels\IO\File;
use Shufflingpixels\IO\FileMode;
$file = File::open("./data/test.wad", FileMode::READ);
$wad = WadFile::parse(BinaryReader::stream($file));
$patchNames = $wad->pNames();
if ($patchNames === null) {
throw new RuntimeException('PNAMES lump was not found in WAD file.');
}
if (!is_dir('output/patches')) {
mkdir('output/patches', 0o0777, true);
}
if (!is_dir('output/textures')) {
mkdir('output/textures', 0o0777, true);
}
$renderer = new Renderer();
$pictureRenderer = $renderer->createPicture();
foreach ($patchNames as $patchName) {
$patch = $wad->firstLumpByName($patchName);
if ($patch === null) {
echo sprintf("Skipping patch %s (missing lump)\n", $patchName);
continue;
}
echo sprintf("Rendering patch %s\n", $patchName);
$pictureRenderer->render($patch->asPicture())->save(sprintf("output/patches/%s.png", $patchName));
}
$textures = $wad->resolveTextures();
foreach ($textures as $texture) {
$canvas = $renderer->createTexture($texture->width, $texture->height);
foreach ($texture->patches as $patch) {
if ($patch->patchName === null) {
continue;
}
$patchPath = sprintf('output/patches/%s.png', $patch->patchName);
if (!is_file($patchPath)) {
echo sprintf("Skipping patch %s for texture %s (no PNG)\n", $patch->patchName, $texture->name);
continue;
}
$canvas->blit($patchPath, $patch->originX, $patch->originY);
}
echo sprintf("Rendering texture %s\n", $texture->name);
$canvas->image()->save(sprintf('output/textures/%s.png', $texture->name));
}

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<?php
use Doom\Image\Renderer;
use Doom\Picture\Picture;
use Intervention\Image\Encoders\PngEncoder;
/**
* @return array<int, array{0:int,1:int,2:int}>
*/
function testPalette(): array
{
$palette = array_fill(0, 256, [0, 0, 0]);
$palette[1] = [255, 0, 0];
$palette[2] = [0, 255, 0];
return $palette;
}
test('renders a patch to PNG bytes using configured palette', function (): void {
$picture = new Picture(
width: 2,
height: 2,
left: 0,
top: 0,
posts: [
0 => [
['y' => 0, 'topdelta' => 0, 'pixels' => [1]],
],
1 => [
['y' => 1, 'topdelta' => 1, 'pixels' => [2]],
],
],
);
$png = (string) (new Renderer(testPalette()))
->createPicture()
->render($picture)
->encode(new PngEncoder());
expect(substr($png, 0, 8))->toBe("\x89PNG\r\n\x1A\n");
$image = imagecreatefromstring($png);
expect($image)->not->toBeFalse();
$topLeft = imagecolorsforindex($image, imagecolorat($image, 0, 0));
expect([$topLeft['red'], $topLeft['green'], $topLeft['blue'], $topLeft['alpha']])->toBe([255, 0, 0, 0]);
$bottomLeft = imagecolorsforindex($image, imagecolorat($image, 0, 1));
expect($bottomLeft['alpha'])->toBe(127);
$bottomRight = imagecolorsforindex($image, imagecolorat($image, 1, 1));
expect([$bottomRight['red'], $bottomRight['green'], $bottomRight['blue'], $bottomRight['alpha']])->toBe([0, 255, 0, 0]);
imagedestroy($image);
});
test('renders with default palette when custom one is not provided', function (): void {
$picture = new Picture(
width: 1,
height: 1,
left: 0,
top: 0,
posts: [
0 => [
['y' => 0, 'topdelta' => 0, 'pixels' => [1]],
],
],
);
$png = (string) (new Renderer())
->createPicture()
->render($picture)
->encode(new PngEncoder());
$image = imagecreatefromstring($png);
expect($image)->not->toBeFalse();
$pixel = imagecolorsforindex($image, imagecolorat($image, 0, 0));
expect([$pixel['red'], $pixel['green'], $pixel['blue']])->toBe([31, 23, 11]);
imagedestroy($image);
});

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<?php
use Doom\Image\Renderer;
use Doom\Picture\Picture;
use Intervention\Image\Encoders\PngEncoder;
/**
* @return array<int, array{0:int,1:int,2:int}>
*/
function imageTestPalette(): array
{
$palette = array_fill(0, 256, [0, 0, 0]);
$palette[1] = [255, 0, 0];
$palette[2] = [0, 255, 0];
return $palette;
}
function testPatchPicture(): Picture
{
return new Picture(
width: 2,
height: 2,
left: 0,
top: 0,
posts: [
0 => [
['y' => 0, 'topdelta' => 0, 'pixels' => [1]],
],
1 => [
['y' => 1, 'topdelta' => 1, 'pixels' => [2]],
],
],
);
}
test('can blit a Picture into a texture and encode png', function (): void {
$texture = (new Renderer(imageTestPalette()))->createTexture(4, 3);
$texture->blit(testPatchPicture(), 1, 1);
$png = (string) $texture->image()->encode(new PngEncoder());
expect(substr($png, 0, 8))->toBe("\x89PNG\r\n\x1A\n");
$image = imagecreatefromstring($png);
expect($image)->not->toBeFalse();
$pixel = imagecolorsforindex($image, imagecolorat($image, 1, 1));
expect([$pixel['red'], $pixel['green'], $pixel['blue'], $pixel['alpha']])->toBe([255, 0, 0, 0]);
$transparent = imagecolorsforindex($image, imagecolorat($image, 0, 0));
expect($transparent['alpha'])->toBe(127);
imagedestroy($image);
});
test('can blit a png file into a texture and write it', function (): void {
$sourcePath = tempnam(sys_get_temp_dir(), 'doom-src-');
$outPath = tempnam(sys_get_temp_dir(), 'doom-out-');
if ($sourcePath === false || $outPath === false) {
throw new RuntimeException('Failed to allocate temp files.');
}
$sourcePng = $sourcePath . '.png';
$targetPng = $outPath . '.png';
@unlink($sourcePath);
@unlink($outPath);
try {
$sourceTexture = (new Renderer(imageTestPalette()))->createTexture(2, 2);
$sourceTexture->blit(testPatchPicture());
$sourceTexture->image()->encode(new PngEncoder())->save($sourcePng);
$targetTexture = (new Renderer())->createTexture(6, 4);
$targetTexture->blit($sourcePng, 2, 1);
$targetTexture->image()->encode(new PngEncoder())->save($targetPng);
expect(is_file($targetPng))->toBeTrue();
$image = imagecreatefrompng($targetPng);
expect($image)->not->toBeFalse();
$pixel = imagecolorsforindex($image, imagecolorat($image, 2, 1));
expect([$pixel['red'], $pixel['green'], $pixel['blue']])->toBe([255, 0, 0]);
imagedestroy($image);
} finally {
@unlink($sourcePng);
@unlink($targetPng);
}
});

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<?php
use Doom\Picture\DoomPalette;
test('provides a valid default doom palette', function (): void {
$palette = DoomPalette::default();
expect($palette->toArray())->toHaveCount(256);
expect($palette->colorAt(0))->toBe([0, 0, 0]);
expect($palette->colorAt(1))->toBe([31, 23, 11]);
});
test('extracts palette data from PLAYPAL bytes', function (): void {
$palette0 = str_repeat("\x00\x00\x00", 256);
$palette1 = str_repeat("\x10\x20\x30", 256);
$palette = DoomPalette::fromPlaypal($palette0 . $palette1, 1);
expect($palette->toArray())->toHaveCount(256);
expect($palette->colorAt(0))->toBe([16, 32, 48]);
expect($palette->colorAt(255))->toBe([16, 32, 48]);
});
test('rejects invalid PLAYPAL palette selection', function (): void {
expect(fn () => DoomPalette::fromPlaypal("\x00", 0))->toThrow(RuntimeException::class);
expect(fn () => DoomPalette::fromPlaypal(str_repeat("\x00", 768), -1))->toThrow(InvalidArgumentException::class);
});

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<?php
use Doom\Picture\Palette;
test('creates palette from bytes and roundtrips', function (): void {
$bytes = str_repeat("\x01\x02\x03", 256);
$palette = Palette::fromBytes($bytes);
expect($palette->colorAt(0))->toBe([1, 2, 3]);
expect($palette->colorAt(255))->toBe([1, 2, 3]);
expect($palette->toBytes())->toBe($bytes);
});
test('rejects invalid palette byte length', function (): void {
expect(fn () => Palette::fromBytes("\x00"))->toThrow(InvalidArgumentException::class);
});

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<?php
use Doom\Texture\PNamesParser;
test('parses PNAMES lump names', function (): void {
$data = pack('V', 3)
. pack('a8', 'BROWN1')
. pack('a8', 'STARTAN3')
. pack('a8', 'BIGDOOR2');
$pNames = PNamesParser::parseBytes($data);
expect($pNames)->toHaveCount(3);
expect($pNames)->toBe(['BROWN1', 'STARTAN3', 'BIGDOOR2']);
expect($pNames[1] ?? null)->toBe('STARTAN3');
expect($pNames[10] ?? null)->toBeNull();
expect(array_search('BIGDOOR2', $pNames, true))->toBe(2);
expect(array_search('MISSING', $pNames, true))->toBeFalse();
});
test('throws on truncated PNAMES lump', function (): void {
$data = pack('V', 2) . pack('a8', 'ONLYONE');
expect(fn () => PNamesParser::parseBytes($data))->toThrow(RuntimeException::class);
});

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<?php
use Doom\Texture\TextureResolver;
use Doom\Wad\File;
use Doom\Wad\Types\Lump;
function s16(int $value): string
{
return pack('v', $value & 0xFFFF);
}
/**
* @param array<int, array{originX:int, originY:int, patch:int, stepDir:int, colorMap:int}> $patches
*/
function textureRecord(string $name, bool $masked, int $width, int $height, array $patches): string
{
$data = pack('a8VvvVv', $name, $masked ? 1 : 0, $width, $height, 0, count($patches));
foreach ($patches as $patch) {
$data .= s16($patch['originX']);
$data .= s16($patch['originY']);
$data .= pack('v', $patch['patch']);
$data .= pack('v', $patch['stepDir']);
$data .= pack('v', $patch['colorMap']);
}
return $data;
}
/**
* @param string[] $records
*/
function textureXData(array $records): string
{
$count = count($records);
$offset = 4 + ($count * 4);
$offsets = [];
$body = '';
foreach ($records as $record) {
$offsets[] = $offset;
$body .= $record;
$offset += strlen($record);
}
$data = pack('V', $count);
foreach ($offsets as $itemOffset) {
$data .= pack('V', $itemOffset);
}
return $data . $body;
}
/**
* @param string[] $names
*/
function pnamesData(array $names): string
{
$data = pack('V', count($names));
foreach ($names as $name) {
$data .= pack('a8', $name);
}
return $data;
}
function appendLump(File $wad, string $name, string $data): void
{
$index = $wad->lumps->count();
$wad->lumps->push(new Lump(
offset: 0,
size: strlen($data),
name: strtoupper($name),
data: $data,
index: $index,
));
}
test('resolves textures using PNAMES and patch lumps', function (): void {
$wad = new File();
appendLump($wad, 'PNAMES', pnamesData(['PATCHA', 'PATCHB']));
appendLump($wad, 'TEXTURE1', textureXData([
textureRecord('TEXA', false, 64, 64, [
['originX' => 0, 'originY' => 0, 'patch' => 0, 'stepDir' => 0, 'colorMap' => 0],
]),
textureRecord('TEXB', false, 32, 16, [
['originX' => 8, 'originY' => -2, 'patch' => 0, 'stepDir' => 0, 'colorMap' => 0],
]),
]));
appendLump($wad, 'TEXTURE2', textureXData([
textureRecord('TEXA', true, 128, 32, [
['originX' => 4, 'originY' => 5, 'patch' => 1, 'stepDir' => 0, 'colorMap' => 0],
['originX' => 0, 'originY' => 0, 'patch' => 5, 'stepDir' => 0, 'colorMap' => 0],
]),
]));
appendLump($wad, 'PATCHA', '');
$resolved = $wad->resolveTextures();
expect($resolved)->toHaveCount(2);
expect($resolved)->toHaveKey('TEXA');
expect($resolved)->toHaveKey('TEXB');
$texA = $resolved['TEXA'];
expect($texA->masked)->toBeTrue();
expect($texA->width)->toBe(128);
expect($texA->height)->toBe(32);
expect($texA->patches)->toHaveCount(2);
expect($texA->patches[0]->patchName)->toBe('PATCHB');
expect($texA->patches[0]->lumpIndex)->toBeNull();
expect($texA->patches[0]->isResolved())->toBeFalse();
expect($texA->patches[1]->patchName)->toBeNull();
$texB = TextureResolver::forWad($wad)->resolveByName('texb');
expect($texB)->not->toBeNull();
expect($texB->patches[0]->patchName)->toBe('PATCHA');
expect($texB->patches[0]->lumpIndex)->toBe(3);
expect($texB->patches[0]->isResolved())->toBeTrue();
});
test('throws when PNAMES lump is missing', function (): void {
$wad = new File();
appendLump($wad, 'TEXTURE1', textureXData([
textureRecord('TEXA', false, 16, 16, [
['originX' => 0, 'originY' => 0, 'patch' => 0, 'stepDir' => 0, 'colorMap' => 0],
]),
]));
expect(fn () => $wad->resolveTextures())->toThrow(RuntimeException::class);
});

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<?php
use Doom\Texture\TextureXParser;
function le16s(int $value): string
{
return pack('v', $value & 0xFFFF);
}
test('parses TEXTUREX definitions and patch references', function (): void {
$headerSize = 4 + (2 * 4);
$offset0 = $headerSize;
$offset1 = $offset0 + 32;
$texture0 = pack('a8VvvVv', 'BRICK1', 0, 64, 128, 0, 1)
. le16s(8)
. le16s(-4)
. pack('v', 3)
. pack('v', 0)
. pack('v', 0);
$texture1 = pack('a8VvvVv', 'METAL2', 1, 32, 32, 0, 2)
. le16s(0)
. le16s(0)
. pack('v', 7)
. pack('v', 0)
. pack('v', 0)
. le16s(12)
. le16s(4)
. pack('v', 8)
. pack('v', 0)
. pack('v', 0);
$data = pack('V', 2)
. pack('V', $offset0)
. pack('V', $offset1)
. $texture0
. $texture1;
$textureX = TextureXParser::parseBytes($data);
expect($textureX->numTextures)->toBe(2);
expect($textureX->offsets)->toBe([$offset0, $offset1]);
expect($textureX->textures)->toHaveCount(2);
$first = $textureX->textures[0];
expect($first->name)->toBe('BRICK1');
expect($first->masked)->toBeFalse();
expect($first->width)->toBe(64);
expect($first->height)->toBe(128);
expect($first->patches)->toHaveCount(1);
expect($first->patches[0]->originX)->toBe(8);
expect($first->patches[0]->originY)->toBe(-4);
expect($first->patches[0]->patch)->toBe(3);
$second = $textureX->firstTextureByName('metal2');
expect($second)->not->toBeNull();
expect($second->masked)->toBeTrue();
expect($second->patches)->toHaveCount(2);
expect($second->patches[1]->originX)->toBe(12);
expect($second->patches[1]->originY)->toBe(4);
expect($second->patches[1]->patch)->toBe(8);
});
test('throws on invalid texture offset', function (): void {
$data = pack('V', 1) . pack('V', 999);
expect(fn () => TextureXParser::parseBytes($data))->toThrow(RuntimeException::class);
});