Initial commit

tests/Unit/Image/TextureTest.php

@@ -0,0 +1,90 @@
+<?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);
+    }
+});