Initial commit

tests/Unit/Texture/TextureResolverTest.php

@@ -0,0 +1,135 @@
+<?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);
+});