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< > BotCompany Repo | #1036553 // rotateImage - rotate image into a new image just big enough to fit, with transparent background

JavaX fragment (include) [tags: use-pretranspiled]

Libraryless. Click here for Pure Java version (59L/1K).

// Thanks to ChatGPT

static BufferedImage rotateImage(BufferedImage image, double angle) {
  int width = image.getWidth();
  int height = image.getHeight();

  // Calculate new image size to fit rotated image
  double radians = Math.toRadians(angle);
  double sin = Math.abs(Math.sin(radians));
  double cos = Math.abs(Math.cos(radians));
  int newWidth = (int) Math.floor(width * cos + height * sin);
  int newHeight = (int) Math.floor(height * cos + width * sin);

  // Create new image with transparent background
  BufferedImage rotated = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_ARGB);
  Graphics2D g2d = rotated.createGraphics();
  AffineTransform at = new AffineTransform();

  // Translate to center of image and rotate
  at.translate((newWidth - width) / 2, (newHeight - height) / 2);
  at.rotate(radians, width / 2, height / 2);

  // Draw original image onto new image with transformation
  g2d.setTransform(at);
  g2d.drawImage(image, 0, 0, null);
  g2d.dispose();

  return rotated;
}

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Snippet ID: #1036553
Snippet name: rotateImage - rotate image into a new image just big enough to fit, with transparent background
Eternal ID of this version: #1036553/1
Text MD5: 34a33d7ecce17923743c2dda87fc79bb
Transpilation MD5: 7bdb6b36ea9d2a592a79815754f2a4ab
Author: stefan
Category: javax / imaging
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2023-02-13 18:55:03
Source code size: 1047 bytes / 29 lines
Pitched / IR pitched: No / No
Views / Downloads: 72 / 104
Referenced in: [show references]