page.php

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     */
    public function extractFont($fontName)
    {
        if ($this->_pageDictionary->Resources->Font === null) {
            // Page doesn't have any font attached
            return null;
        }
        
        $fontResources = $this->_pageDictionary->Resources->Font;

        foreach ($fontResources->getKeys() as $fontResourceName) {
            $fontDictionary = $fontResources->$fontResourceName;
            
            if (! ($fontDictionary instanceof Zend_Pdf_Element_Reference  ||
                   $fontDictionary instanceof Zend_Pdf_Element_Object) ) {
                // Font dictionary has to be an indirect object or object reference
                continue;
            }
            
            if ($fontDictionary->BaseFont->value != $fontName) {
                continue;
            }
            
            try {
                // Try to extract font
                return new Zend_Pdf_Resource_Font_Extracted($fontDictionary); 
            } catch (Zend_Pdf_Exception $e) {
                if ($e->getMessage() != 'Unsupported font type.') {
                    throw $e;
                }
                
                // Continue searhing font with specified name
            }
        }
        
        return null;
    } 

    /**
     * Get current font size
     *
     * @return float $fontSize
     */
    public function getFontSize()
    {
        return $this->_fontSize;
    }

    /**
     * Return the style, applied to the page.
     *
     * @return Zend_Pdf_Style|null
     */
    public function getStyle()
    {
        return $this->_style;
    }


    /**
     * Save the graphics state of this page.
     * This takes a snapshot of the currently applied style, position, clipping area and
     * any rotation/translation/scaling that has been applied.
     *
     * @todo check for the open paths
     * @throws Zend_Pdf_Exception    - if a save is performed with an open path
     */
    public function saveGS()
    {
        $this->_saveCount++;

        $this->_addProcSet('PDF');
        $this->_contents .= " q\n";
    }

    /**
     * Restore the graphics state that was saved with the last call to saveGS().
     *
     * @throws Zend_Pdf_Exception   - if there is no previously saved state
     */
    public function restoreGS()
    {
        if ($this->_saveCount-- <= 0) {
            throw new Zend_Pdf_Exception('Restoring graphics state which is not saved');
        }
        $this->_contents .= " Q\n";
    }


    /**
     * Intersect current clipping area with a circle.
     *
     * @param float $x
     * @param float $y
     * @param float $radius
     * @param float $startAngle
     * @param float $endAngle
     */
    public function clipCircle($x, $y, $radius, $startAngle = null, $endAngle = null)
    {
        $this->clipEllipse($x - $radius, $y - $radius,
                           $x + $radius, $y + $radius,
                           $startAngle, $endAngle);
    }

    /**
     * Intersect current clipping area with a polygon.
     *
     * Method signatures:
     * drawEllipse($x1, $y1, $x2, $y2);
     * drawEllipse($x1, $y1, $x2, $y2, $startAngle, $endAngle);
     *
     * @todo process special cases with $x2-$x1 == 0 or $y2-$y1 == 0
     *
     * @param float $x1
     * @param float $y1
     * @param float $x2
     * @param float $y2
     * @param float $startAngle
     * @param float $endAngle
     */
    public function clipEllipse($x1, $y1, $x2, $y2, $startAngle = null, $endAngle = null)
    {
        $this->_addProcSet('PDF');

        if ($x2 < $x1) {
            $temp = $x1;
            $x1   = $x2;
            $x2   = $temp;
        }
        if ($y2 < $y1) {
            $temp = $y1;
            $y1   = $y2;
            $y2   = $temp;
        }

        $x = ($x1 + $x2)/2.;
        $y = ($y1 + $y2)/2.;

        $xC = new Zend_Pdf_Element_Numeric($x);
        $yC = new Zend_Pdf_Element_Numeric($y);

        if ($startAngle !== null) {
            if ($startAngle != 0) { $startAngle = fmod($startAngle, M_PI*2); }
            if ($endAngle   != 0) { $endAngle   = fmod($endAngle,   M_PI*2); }

            if ($startAngle > $endAngle) {
                $endAngle += M_PI*2;
            }

            $clipPath    = $xC->toString() . ' ' . $yC->toString() . " m\n";
            $clipSectors = (int)ceil(($endAngle - $startAngle)/M_PI_4);
            $clipRadius  = max($x2 - $x1, $y2 - $y1);

            for($count = 0; $count <= $clipSectors; $count++) {
                $pAngle = $startAngle + ($endAngle - $startAngle)*$count/(float)$clipSectors;

                $pX = new Zend_Pdf_Element_Numeric($x + cos($pAngle)*$clipRadius);
                $pY = new Zend_Pdf_Element_Numeric($y + sin($pAngle)*$clipRadius);
                $clipPath .= $pX->toString() . ' ' . $pY->toString() . " l\n";
            }

            $this->_contents .= $clipPath . "h\nW\nn\n";
        }

        $xLeft  = new Zend_Pdf_Element_Numeric($x1);
        $xRight = new Zend_Pdf_Element_Numeric($x2);
        $yUp    = new Zend_Pdf_Element_Numeric($y2);
        $yDown  = new Zend_Pdf_Element_Numeric($y1);

        $xDelta  = 2*(M_SQRT2 - 1)*($x2 - $x1)/3.;
        $yDelta  = 2*(M_SQRT2 - 1)*($y2 - $y1)/3.;
        $xr = new Zend_Pdf_Element_Numeric($x + $xDelta);
        $xl = new Zend_Pdf_Element_Numeric($x - $xDelta);
        $yu = new Zend_Pdf_Element_Numeric($y + $yDelta);
        $yd = new Zend_Pdf_Element_Numeric($y - $yDelta);

        $this->_contents .= $xC->toString() . ' ' . $yUp->toString() . " m\n"
                         .  $xr->toString() . ' ' . $yUp->toString() . ' '
                         .    $xRight->toString() . ' ' . $yu->toString() . ' '
                         .      $xRight->toString() . ' ' . $yC->toString() . " c\n"
                         .  $xRight->toString() . ' ' . $yd->toString() . ' '
                         .    $xr->toString() . ' ' . $yDown->toString() . ' '
                         .      $xC->toString() . ' ' . $yDown->toString() . " c\n"
                         .  $xl->toString() . ' ' . $yDown->toString() . ' '
                         .    $xLeft->toString() . ' ' . $yd->toString() . ' '
                         .      $xLeft->toString() . ' ' . $yC->toString() . " c\n"
                         .  $xLeft->toString() . ' ' . $yu->toString() . ' '
                         .    $xl->toString() . ' ' . $yUp->toString() . ' '
                         .      $xC->toString() . ' ' . $yUp->toString() . " c\n"
                         .  "h\nW\nn\n";
    }


    /**
     * Intersect current clipping area with a polygon.
     *
     * @param array $x  - array of float (the X co-ordinates of the vertices)
     * @param array $y  - array of float (the Y co-ordinates of the vertices)
     * @param integer $fillMethod
     */
    public function clipPolygon($x, $y, $fillMethod = Zend_Pdf_Page::FILL_METHOD_NON_ZERO_WINDING)
    {
        $this->_addProcSet('PDF');

        $firstPoint = true;
        foreach ($x as $id => $xVal) {
            $xObj = new Zend_Pdf_Element_Numeric($xVal);
            $yObj = new Zend_Pdf_Element_Numeric($y[$id]);

            if ($firstPoint) {
                $path = $xObj->toString() . ' ' . $yObj->toString() . " m\n";
                $firstPoint = false;
            } else {
                $path .= $xObj->toString() . ' ' . $yObj->toString() . " l\n";
            }
        }

        $this->_contents .= $path;

        if ($fillMethod == Zend_Pdf_Page::FILL_METHOD_NON_ZERO_WINDING) {
            $this->_contents .= " h\n W\n";
        } else {
            // Even-Odd fill method.
            $this->_contents .= " h\n W*\n";
        }
    }

    /**
     * Intersect current clipping area with a rectangle.
     *
     * @param float $x1
     * @param float $y1
     * @param float $x2
     * @param float $y2
     */
    public function clipRectangle($x1, $y1, $x2, $y2)
    {
        $this->_addProcSet('PDF');

        $x1Obj      = new Zend_Pdf_Element_Numeric($x1);
        $y1Obj      = new Zend_Pdf_Element_Numeric($y1);
        $widthObj   = new Zend_Pdf_Element_Numeric($x2 - $x1);
        $height2Obj = new Zend_Pdf_Element_Numeric($y2 - $y1);

        $this->_contents .= $x1Obj->toString() . ' ' . $y1Obj->toString() . ' '
                         .      $widthObj->toString() . ' ' . $height2Obj->toString() . " re\n"
                         .  " W\n";
    }

    /**
     * Draw a Zend_Pdf_ContentStream at the specified position on the page
     *
     * @param ZPdfContentStream $cs
     * @param float $x1
     * @param float $y1
     * @param float $x2
     * @param float $y2
     */
    public function drawContentStream($cs, $x1, $y1, $x2, $y2)
    {
    }

    /**
     * Draw a circle centered on x, y with a radius of radius.
     *
     * Method signatures:
     * drawCircle($x, $y, $radius);
     * drawCircle($x, $y, $radius, $fillType);
     * drawCircle($x, $y, $radius, $startAngle, $endAngle);
     * drawCircle($x, $y, $radius, $startAngle, $endAngle, $fillType);
     *
     *
     * It's not a really circle, because PDF supports only cubic Bezier curves.
     * But _very_ good approximation.
     * It differs from a real circle on a maximum 0.00026 radiuses
     * (at PI/8, 3*PI/8, 5*PI/8, 7*PI/8, 9*PI/8, 11*PI/8, 13*PI/8 and 15*PI/8 angles).
     * At 0, PI/4, PI/2, 3*PI/4, PI, 5*PI/4, 3*PI/2 and 7*PI/4 it's exactly a tangent to a circle.
     *
     * @param float $x
     * @param float $y
     * @param float $radius
     * @param mixed $param4
     * @param mixed $param5
     * @param mixed $param6
     */
    public function  drawCircle($x, $y, $radius, $param4 = null, $param5 = null, $param6 = null)
    {
        $this->drawEllipse($x - $radius, $y - $radius,
                           $x + $radius, $y + $radius,
                           $param4, $param5, $param6);
    }

    /**
     * Draw an ellipse inside the specified rectangle.
     *
     * Method signatures:
     * drawEllipse($x1, $y1, $x2, $y2);
     * drawEllipse($x1, $y1, $x2, $y2, $fillType);
     * drawEllipse($x1, $y1, $x2, $y2, $startAngle, $endAngle);
     * drawEllipse($x1, $y1, $x2, $y2, $startAngle, $endAngle, $fillType);
     *
     * @todo process special cases with $x2-$x1 == 0 or $y2-$y1 == 0
     *
     * @param float $x1
     * @param float $y1
     * @param float $x2
     * @param float $y2
     * @param mixed $param5
     * @param mixed $param6
     * @param mixed $param7
     */
    public function drawEllipse($x1, $y1, $x2, $y2, $param5 = null, $param6 = null, $param7 = null)
    {
        if ($param5 === null) {
            // drawEllipse($x1, $y1, $x2, $y2);
            $startAngle = null;
            $fillType = Zend_Pdf_Page::SHAPE_DRAW_FILL_AND_STROKE;
        } else if ($param6 === null) {
            // drawEllipse($x1, $y1, $x2, $y2, $fillType);
            $startAngle = null;
            $fillType = $param5;
        } else {
            // drawEllipse($x1, $y1, $x2, $y2, $startAngle, $endAngle);
            // drawEllipse($x1, $y1, $x2, $y2, $startAngle, $endAngle, $fillType);
            $startAngle = $param5;
            $endAngle   = $param6;

            if ($param7 === null) {
                $fillType = Zend_Pdf_Page::SHAPE_DRAW_FILL_AND_STROKE;
            } else {
                $fillType = $param7;
            }
        }

        $this->_addProcSet('PDF');

        if ($x2 < $x1) {
            $temp = $x1;
            $x1   = $x2;
            $x2   = $temp;
        }
        if ($y2 < $y1) {
            $temp = $y1;
            $y1   = $y2;
            $y2   = $temp;
        }