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<?php
function generate_message_screenshot(GdImage $pfp, string $username, string $channel, string $message, int $timestamp): GdImage
{
$font_size = 18;
$font_path = 'Arial.ttf';
$width = 500;
$height = 200;
$pad_x = 24;
$spacing = 4;
// dividing the message lines
$message_lines = [];
$max_line_width = $width - $pad_x * 4;
$buffer_line = "";
$buffer_part = "";
foreach (str_split($message) as $c) {
$buffer_part .= $c;
$bbox_line = imagettfbbox($font_size, 0, $font_path, $buffer_line);
$bbox_part = imagettfbbox($font_size, 0, $font_path, $buffer_part);
$line_width = abs($bbox_line[2] - $bbox_line[0]);
$line_width += abs($bbox_part[2] - $bbox_part[0]);
if ($line_width >= $max_line_width) {
if (empty($buffer_line)) {
$buffer_line .= $buffer_part;
$buffer_part = "";
}
array_push($message_lines, $buffer_line);
$buffer_line = "";
}
if ($c == ' ') {
$buffer_line .= $buffer_part;
$buffer_part = "";
}
}
if (!empty($buffer_part)) {
$buffer_line .= $buffer_part;
}
array_push($message_lines, $buffer_line);
// counting real image height
for ($i = 0; $i < count($message_lines); $i++) {
$h = $pad_x + imagesy($pfp) + $font_size * $i + $spacing * $i;
if ($h + $font_size * 2 >= $height) {
$height += $font_size + $spacing;
}
}
$height += $font_size + $pad_x + $spacing;
$image = imagecreate($width, $height);
$gray_color = imagecolorallocate($image, 50, 50, 50);
$black_color = imagecolorallocate($image, 0, 0, 0);
$white_color = imagecolorallocate($image, 255, 255, 255);
// setting the background
imagefilledrectangle($image, 0, 0, $width, $height, $white_color);
// setting the user's pfp
imagecopy(
$image,
$pfp,
$pad_x,
$pad_x,
0,
0,
imagesx($pfp),
imagesy($pfp)
);
// setting the username and the channel name
imagettftext(
$image,
$font_size,
0,
imagesx($pfp) + 32,
imagesy($pfp) / 2 + $pad_x,
$black_color,
$font_path,
$username
);
imagettftext(
$image,
$font_size - 2,
0,
imagesx($pfp) + 32,
imagesy($pfp) / 2 + $pad_x + $font_size,
$gray_color,
$font_path,
"in #{$channel}"
);
// setting the message
for ($i = 0; $i < count($message_lines); $i++) {
$h = 32 + $pad_x + imagesy($pfp) + $font_size * $i + $spacing * $i;
imagettftext(
$image,
$font_size,
0,
$pad_x,
$h,
$black_color,
$font_path,
$message_lines[$i]
);
}
// drawing the twitch logo
// setting the date
imagettftext(
$image,
$font_size - 4,
0,
$pad_x,
$height - $pad_x,
$gray_color,
$font_path,
date("F j, Y · G:i", $timestamp) . ' (UTC)'
);
return $image;
}
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