Create LGTM image with Scrimage

ScrimageLgtmGenerator.ipynb

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   "source": [
    "import com.sksamuel.scrimage.ImmutableImage\n",
    "import com.sksamuel.scrimage.graphics.RichGraphics2D\n",
    "import com.sksamuel.scrimage.nio.PngWriter\n",
    "import java.awt.Color\n",
    "import java.awt.Font\n",
    "import java.awt.RenderingHints\n",
    "import java.awt.geom.Rectangle2D\n",
    "import java.io.File\n",
    "import java.nio.file.Files\n",
    "import java.nio.file.Path\n",
    "import java.nio.file.StandardOpenOption"
   ],
   "outputs": [],
   "execution_count": 33
  },
  {
   "metadata": {
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     "start_time": "2024-09-01T12:06:39.405859Z"
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   },
   "cell_type": "code",
   "source": [
    "// Read image\n",
    "val imageFile = File(\"test_image.png\")\n",
    "val image = ImmutableImage.loader().fromFile(imageFile)"
   ],
   "outputs": [],
   "execution_count": 34
  },
  {
   "metadata": {
    "ExecuteTime": {
     "end_time": "2024-09-01T12:06:39.467261Z",
     "start_time": "2024-09-01T12:06:39.444271Z"
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   },
   "cell_type": "code",
   "source": [
    "// Prepare text\n",
    "val text = \"LGTM\"\n",
    "val fontSize = image.width / 3\n",
    "val font = Font(\"Arial\", Font.BOLD, fontSize)"
   ],
   "outputs": [],
   "execution_count": 35
  },
  {
   "metadata": {
    "ExecuteTime": {
     "end_time": "2024-09-01T12:06:39.488604Z",
     "start_time": "2024-09-01T12:06:39.469594Z"
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   },
   "cell_type": "code",
   "source": [
    "// Prepare render\n",
    "val g2 = RichGraphics2D(image.awt().createGraphics())\n",
    "g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)"
   ],
   "outputs": [],
   "execution_count": 36
  },
  {
   "metadata": {
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     "start_time": "2024-09-01T12:06:39.490937Z"
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   },
   "cell_type": "code",
   "source": [
    "// Set font and calculate text size\n",
    "g2.font = font\n",
    "val textBounds: Rectangle2D = g2.fontMetrics.getStringBounds(text, g2)"
   ],
   "outputs": [],
   "execution_count": 37
  },
  {
   "metadata": {
    "ExecuteTime": {
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     "start_time": "2024-09-01T12:06:39.512516Z"
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   },
   "cell_type": "code",
   "source": [
    "// Calculate position of text (Center)\n",
    "val x = (image.width - textBounds.width) / 2\n",
    "val y = (image.height - textBounds.height) / 2 + g2.fontMetrics.ascent"
   ],
   "outputs": [],
   "execution_count": 38
  },
  {
   "metadata": {
    "ExecuteTime": {
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     "start_time": "2024-09-01T12:06:39.538422Z"
    }
   },
   "cell_type": "code",
   "source": [
    "// Draw outline of text\n",
    "val outlineOffset = 3\n",
    "g2.color = Color.BLACK\n",
    "for (dx in -outlineOffset..outlineOffset) {\n",
    "    for (dy in -outlineOffset..outlineOffset) {\n",
    "        if (dx != 0 || dy != 0) {\n",
    "            g2.drawString(text, (x + dx).toFloat(), (y + dy).toFloat())\n",
    "        }\n",
    "    }\n",
    "}"
   ],
   "outputs": [],
   "execution_count": 39
  },
  {
   "metadata": {
    "ExecuteTime": {
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     "start_time": "2024-09-01T12:06:39.603674Z"
    }
   },
   "cell_type": "code",
   "source": [
    "// Draw text\n",
    "g2.color = Color.WHITE\n",
    "g2.drawString(text, x.toFloat(), y.toFloat())"
   ],
   "outputs": [],
   "execution_count": 40
  },
  {
   "metadata": {
    "ExecuteTime": {
     "end_time": "2024-09-01T12:06:39.645210Z",
     "start_time": "2024-09-01T12:06:39.628877Z"
    }
   },
   "cell_type": "code",
   "source": [
    "// Dispose resource\n",
    "g2.dispose()"
   ],
   "outputs": [],
   "execution_count": 41
  },
  {
   "metadata": {
    "ExecuteTime": {
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     "start_time": "2024-09-01T12:06:39.647599Z"
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   },
   "cell_type": "code",
   "source": [
    "// Save image\n",
    "val outputStream = Files.newOutputStream(Path.of(\"test_image_lgtm.png\"), StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.CREATE)\n",
    "outputStream.use {\n",
    "    PngWriter.NoCompression.write(image, image.metadata, it)\n",
    "}"
   ],
   "outputs": [],
   "execution_count": 42
  }
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