Initial commit

tests/Unit/Image/RendererTest.php

@@ -0,0 +1,81 @@
+<?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);
+});