ex.php

<?php
	declare(strict_types=1);

	require dirname(dirname(__DIR__)) . '/fpdf/fpdf.php';
	require __DIR__ . '/PDFTransformTrait.php';

	use FPDF\Scripts\PDFTransform\PDFTransformTrait;

	$pdf = new class extends FPDF {
		use PDFTransformTrait;
	};

	$pdf->AddPage();
	$pdf->SetFont('Arial', '', 12);

	//Scaling
	$pdf->SetDrawColor(200);
	$pdf->SetTextColor(200);
	$pdf->Rect(50, 20, 40, 10, 'D');
	$pdf->Text(50, 19, 'Scale');
	$pdf->SetDrawColor(0);
	$pdf->SetTextColor(0);
	//Start Transformation
	$pdf->StartTransform();
	//Scale by 150% centered by (50,30) which is the lower left corner of the rectangle
	$pdf->ScaleXY(150, 50, 30);
	$pdf->Rect(50, 20, 40, 10, 'D');
	$pdf->Text(50, 19, 'Scale');
	//Stop Transformation
	$pdf->StopTransform();

	//Translation
	$pdf->SetDrawColor(200);
	$pdf->SetTextColor(200);
	$pdf->Rect(125, 20, 40, 10, 'D');
	$pdf->Text(125, 19, 'Translate');
	$pdf->SetDrawColor(0);
	$pdf->SetTextColor(0);
	//Start Transformation
	$pdf->StartTransform();
	//Translate 7 to the right, 5 to the bottom
	$pdf->Translate(7, 5);
	$pdf->Rect(125, 20, 40, 10, 'D');
	$pdf->Text(125, 19, 'Translate');
	//Stop Transformation
	$pdf->StopTransform();

	//Rotation
	$pdf->SetDrawColor(200);
	$pdf->SetTextColor(200);
	$pdf->Rect(50, 50, 40, 10, 'D');
	$pdf->Text(50, 49, 'Rotate');
	$pdf->SetDrawColor(0);
	$pdf->SetTextColor(0);
	//Start Transformation
	$pdf->StartTransform();
	//Rotate 20 degrees counter-clockwise centered by (50,60) which is the lower left corner of the rectangle
	$pdf->Rotate(20, 50, 60);
	$pdf->Rect(50, 50, 40, 10, 'D');
	$pdf->Text(50, 49, 'Rotate');
	//Stop Transformation
	$pdf->StopTransform();

	//Skewing
	$pdf->SetDrawColor(200);
	$pdf->SetTextColor(200);
	$pdf->Rect(125, 50, 40, 10, 'D');
	$pdf->Text(125, 49, 'Skew');
	$pdf->SetDrawColor(0);
	$pdf->SetTextColor(0);
	//Start Transformation
	$pdf->StartTransform();
	//skew 30 degrees along the x-axis centered by (125,60) which is the lower left corner of the rectangle
	$pdf->SkewX(30, 125, 60);
	$pdf->Rect(125, 50, 40, 10, 'D');
	$pdf->Text(125, 49, 'Skew');
	//Stop Transformation
	$pdf->StopTransform();

	//Mirroring horizontally
	$pdf->SetDrawColor(200);
	$pdf->SetTextColor(200);
	$pdf->Rect(50, 80, 40, 10, 'D');
	$pdf->Text(50, 79, 'MirrorH');
	$pdf->SetDrawColor(0);
	$pdf->SetTextColor(0);
	//Start Transformation
	$pdf->StartTransform();
	//mirror horizontally with axis of reflection at x-position 50 (left side of the rectangle)
	$pdf->MirrorH(50);
	$pdf->Rect(50, 80, 40, 10, 'D');
	$pdf->Text(50, 79, 'MirrorH');
	//Stop Transformation
	$pdf->StopTransform();

	//Mirroring vertically
	$pdf->SetDrawColor(200);
	$pdf->SetTextColor(200);
	$pdf->Rect(125, 80, 40, 10, 'D');
	$pdf->Text(125, 79, 'MirrorV');
	$pdf->SetDrawColor(0);
	$pdf->SetTextColor(0);
	//Start Transformation
	$pdf->StartTransform();
	//mirror vertically with axis of reflection at y-position 90 (bottom side of the rectangle)
	$pdf->MirrorV(90);
	$pdf->Rect(125, 80, 40, 10, 'D');
	$pdf->Text(125, 79, 'MirrorV');
	//Stop Transformation
	$pdf->StopTransform();

	//Point reflection
	$pdf->SetDrawColor(200);
	$pdf->SetTextColor(200);
	$pdf->Rect(50, 110, 40, 10, 'D');
	$pdf->Text(50, 109, 'MirrorP');
	$pdf->SetDrawColor(0);
	$pdf->SetTextColor(0);
	//Start Transformation
	$pdf->StartTransform();
	//point reflection at the lower left point of rectangle
	$pdf->MirrorP(50,120);
	$pdf->Rect(50, 110, 40, 10, 'D');
	$pdf->Text(50, 109, 'MirrorP');
	//Stop Transformation
	$pdf->StopTransform();

	//Mirroring against a straigth line described by a point (120, 120) and an angle -20°
	$angle = -20;
	$px = 120;
	$py = 120;

	/* */ //just vor visualisation: the straight line to mirror against
	/* */ $pdf->SetDrawColor(200);
	/* */ $pdf->Line($px - 1, $py - 1, $px + 1, $py + 1);
	/* */ $pdf->Line($px - 1, $py + 1, $px + 1, $py - 1);
	/* */ $pdf->StartTransform();
	/* */ $pdf->Rotate($angle, $px, $py);
	/* */ $pdf->Line($px - 5, $py, $px + 60, $py);
	/* */ $pdf->StopTransform();

	$pdf->SetDrawColor(200);
	$pdf->SetTextColor(200);
	$pdf->Rect(125, 110, 40, 10, 'D');
	$pdf->Text(125, 109, 'MirrorL');
	$pdf->SetDrawColor(0);
	$pdf->SetTextColor(0);
	//Start Transformation
	$pdf->StartTransform();
	//mirror against the straight line
	$pdf->MirrorL($angle, $px, $py);
	$pdf->Rect(125, 110, 40, 10, 'D');
	$pdf->Text(125, 109, 'MirrorL');
	//Stop Transformation
	$pdf->StopTransform();

	$pdf->Output('F', __DIR__ . '/example.pdf');