Overview

The WaterMark class allows you to apply watermarks or custom text to images. It provides options for setting the position, size, and various configurations for both watermarks and text.

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Usage

1. Initializing the Class

First, import the WaterMark class and instantiate it:

require_once 'WaterMark.php';

$wm = new WaterMark();

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2. Setting the Base Image

To apply a watermark or text, you need to load the base image first:

$wm->setImage('path/to/image.jpg');

Parameters:

• filename (string): Path to the image file on which you want to apply the watermark or text.

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3. Adding a Watermark to the Image

To add a watermark, use the addMark method:

$wm->addMark('path/to/watermark.png', 0.2, 'bottom_right');

Parameters:

• filename (string): Path to the watermark image.
• size (float): A relative size for scaling the watermark (e.g., 0.2 for 20% of the base image width).
• position (mixed): Either a predefined position like 'top_left', or a custom position in the form of an array [x, y] (e.g., [100, 50]).

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4. Adding Text to the Image

To add custom text to the image, use the pasteText method:

$wm->pasteText('Sample Text', [
    'font' => 'path/to/font.ttf',
    'size' => 30,
    'color' => '#ffffff',
    'opacity' => 50,
    'position' => [100, 200]
]);

Parameters:

• text (string): The text you want to add to the image.
• config (array): Configuration options for the text.
  • font (string): Path to the TrueType font file.
  • size (int): Font size.
  • color (string): Text color in hexadecimal format (e.g., #ffffff).
  • opacity (int): Opacity level for the text (0-127, where 0 is fully opaque and 127 is fully transparent).
  • position (mixed): Either a predefined position or a custom position in the form of an array [x, y].

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5. Exporting the Watermarked Image

After applying the watermark or text, you can export the final image using the export method:

$wm->export('output_image', 'jpg', 90);

Parameters:

• filename (string): Name of the output file (without the extension).
• format (string): File format, either 'jpg', 'jpeg', or 'png'. Default is 'jpg'.
• quality (int): The quality of the exported image:
  • For JPEG: Value ranges from 1 to 100 (default is 100).
  • For PNG: Value ranges from 0 (no compression) to 9 (maximum compression). Default is 0.

Note: The quality parameter is optional and only relevant to the selected format. JPEG uses values from 1 to 100 for quality, while PNG uses 0 to 9 for compression.

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6. Freeing Up Memory

After you're done processing the image, use the freeMemory method to release the allocated resources:

$wm->freeMemory();

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Example Usage

Here’s a complete example of how to use the WaterMark class:

require_once 'WaterMark.php';

$wm = new WaterMark();

// Set the base image
$wm->setImage('image.jpg');

// Add a watermark at a custom position
$wm->addMark('watermark.png', 0.15, [300, 200]);

// Add text at a specific position
$wm->pasteText('Hello World', [
    'font' => 'path/to/font.ttf',
    'size' => 40,
    'color' => '#ffffff',
    'opacity' => 50,
    'position' => [100, 300]
]);

// Export the final watermarked image with quality settings
$wm->export('watermarked_image', 'jpg', 90);

// Free up resources
$wm->freeMemory();

Predefined Positions

You can use the following predefined positions for both watermarks and text:

• 'top_left'
• 'top_center'
• 'top_right'
• 'center'
• 'middle_left'
• 'middle_right'
• 'bottom_left'
• 'bottom_center'
• 'bottom_right'

Alternatively, you can pass an array [x, y] for a custom position.

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License

This class is open-source and free to use. Contributions are welcome!