function ProcessElements($reader, $writer, $map)
{
while (($element = $reader->Next()) != null) {
switch ($element->GetType()) {
case Element::e_image:
case Element::e_inline_image:
// remove all images by skipping them
break;
case Element::e_text:
// Set all text to blue color.
$gs = $element->GetGState();
$gs->SetFillColorSpace(ColorSpace::CreateDeviceRGB());
$cp = new ColorPt(0.0, 0.0, 1.0);
$gs->SetFillColor($cp);
$writer->WriteElement($element);
break;
case Element::e_form:
$o = $element->GetXObject();
$objNum = $o->GetObjNum();
$map[$objNum] = $o;
$writer->WriteElement($element);
break;
default:
$writer->WriteElement($element);
}
}
}
function CreateButtonAppearance($doc, $button_down)
{
// Create a button appearance stream ------------------------------------
$build = new ElementBuilder();
$writer = new ElementWriter();
$writer->Begin($doc->GetSDFDoc());
// Draw background
$element = $build->CreateRect(0, 0, 101, 37);
$element->SetPathFill(true);
$element->SetPathStroke(false);
$element->GetGState()->SetFillColorSpace(ColorSpace::CreateDeviceGray());
$element->GetGState()->SetFillColor(new ColorPt(0.75, 0.0, 0.0));
$writer->WriteElement($element);
// Draw 'Submit' text
$writer->WriteElement($build->CreateTextBegin());
$text = "Submit";
$element = $build->CreateTextRun($text, Font::Create($doc->GetSDFDoc(), Font::e_helvetica_bold), 12.0);
$element->GetGState()->SetFillColor(new ColorPt(0.0, 0.0, 0.0));
if ($button_down) {
$element->SetTextMatrix(1.0, 0.0, 0.0, 1.0, 33.0, 10.0);
} else {
$element->SetTextMatrix(1.0, 0.0, 0.0, 1.0, 30.0, 13.0);
}
$writer->WriteElement($element);
$writer->WriteElement($build->CreateTextEnd());
$stm = $writer->End();
// Set the bounding box
$stm->PutRect("BBox", 0, 0, 101, 37);
$stm->PutName("Subtype", "Form");
return $stm;
}
function AddCoverPage($doc)
{
// Here we dynamically generate cover page (please see ElementBuilder
// sample for more extensive coverage of PDF creation API).
$page = $doc->PageCreate(new Rect(0.0, 0.0, 200.0, 200.0));
$builder = new ElementBuilder();
$writer = new ElementWriter();
$writer->Begin($page);
$font = Font::Create($doc->GetSDFDoc(), Font::e_helvetica);
$writer->WriteElement($builder->CreateTextBegin($font, 12.0));
$element = $builder->CreateTextRun("My PDF Collection");
$element->SetTextMatrix(1.0, 0.0, 0.0, 1.0, 50.0, 96.0);
$element->GetGState()->SetFillColorSpace(ColorSpace::CreateDeviceRGB());
$element->GetGState()->SetFillColor(new ColorPt(1.0, 0.0, 0.0));
$writer->WriteElement($element);
$writer->WriteElement($builder->CreateTextEnd());
$writer->End();
$doc->PagePushBack($page);
// Alternatively we could import a PDF page from a template PDF document
// (for an example please see PDFPage sample project).
// ...
}
function CreateTilingPattern($doc)
{
$writer = new ElementWriter();
$builder = new ElementBuilder();
// Create a new pattern content stream - a heart. ------------
$writer->Begin($doc->GetSDFDoc());
$builder->PathBegin();
$builder->MoveTo(0, 0);
$builder->CurveTo(500, 500, 125, 625, 0, 500);
$builder->CurveTo(-125, 625, -500, 500, 0, 0);
$heart = $builder->PathEnd();
$heart->SetPathFill(true);
// Set heart color to red.
$heart->GetGState()->SetFillColorSpace(ColorSpace::CreateDeviceRGB());
$heart->GetGState()->SetFillColor(new ColorPt(1.0, 0.0, 0.0));
$writer->WriteElement($heart);
$pattern_dict = $writer->End();
// Initialize pattern dictionary. For details on what each parameter represents please
// refer to Table 4.22 (Section '4.6.2 Tiling Patterns') in PDF Reference Manual.
$pattern_dict->PutName("Type", "Pattern");
$pattern_dict->PutNumber("PatternType", 1);
// TilingType - Constant spacing.
$pattern_dict->PutNumber("TilingType", 1);
// This is a Type1 pattern - A colored tiling pattern.
$pattern_dict->PutNumber("PaintType", 1);
// Set bounding box
$pattern_dict->PutRect("BBox", -253, 0, 253, 545);
// Create and set the matrix
$pattern_mtx = new Matrix2D(0.04, 0.0, 0.0, 0.04, 0.0, 0.0);
$pattern_dict->PutMatrix("Matrix", $pattern_mtx);
// Set the desired horizontal and vertical spacing between pattern cells,
// measured in the pattern coordinate system.
$pattern_dict->PutNumber("XStep", 1000);
$pattern_dict->PutNumber("YStep", 1000);
return $pattern_dict;
// finished creating the Pattern resource
}
function CreateGroup2($doc, $layer)
{
$writer = new ElementWriter();
$writer->Begin($doc->GetSDFDoc());
// Create a path object in the shape of a heart.
$builder = new ElementBuilder();
$builder->PathBegin();
// start constructing the path
$builder->MoveTo(306, 396);
$builder->CurveTo(681, 771, 399.75, 864.75, 306, 771);
$builder->CurveTo(212.25, 864.75, -69, 771, 306, 396);
$builder->ClosePath();
$element = $builder->PathEnd();
// the path geometry is now specified.
// Set the path FILL color space and color.
$element->SetPathFill(true);
$gstate = $element->GetGState();
$gstate->SetFillColorSpace(ColorSpace::CreateDeviceCMYK());
$gstate->SetFillColor(new ColorPt(1.0, 0.0, 0.0, 0.0));
// cyan
// Set the path STROKE color space and color.
$element->SetPathStroke(true);
$gstate->SetStrokeColorSpace(ColorSpace::CreateDeviceRGB());
$gstate->SetStrokeColor(new ColorPt(1.0, 0.0, 0.0));
// red
$gstate->SetLineWidth(20);
$gstate->SetTransform(0.5, 0.0, 0.0, 0.5, 280.0, 300.0);
$writer->WriteElement($element);
$grp_obj = $writer->End();
// Indicate that this form (content group) belongs to the given layer (OCG).
$grp_obj->PutName("Subtype", "Form");
$grp_obj->Put("OC", $layer);
$grp_obj->PutRect("BBox", 0, 0, 1000, 1000);
// Set the clip box for the content.
return $grp_obj;
}
$gstate->SetFillColor(new ColorPt(0.0, 1.0, 0.0, 0.0)); $gstate->SetFillOpacity(0.5); $writer->WriteElement($element); $writer->WriteElement($builder->CreateTextEnd()); // Draw three overlapping transparent circles. $builder->PathBegin(); // start constructing the path $builder->MoveTo(459.223, 505.646); $builder->CurveTo(459.223, 415.841, 389.85, 343.04, 304.273, 343.04); $builder->CurveTo(218.697, 343.04, 149.324, 415.841, 149.324, 505.646); $builder->CurveTo(149.324, 595.45, 218.697, 668.25, 304.273, 668.25); $builder->CurveTo(389.85, 668.25, 459.223, 595.45, 459.223, 505.646); $element = $builder->PathEnd(); $element->SetPathFill(true); $gstate = $element->GetGState(); $gstate->SetFillColorSpace(ColorSpace::CreateDeviceRGB()); $gstate->SetFillColor(new ColorPt(0.0, 0.0, 1.0)); $gstate->SetBlendMode(GState::e_bl_normal); $gstate->SetFillOpacity(0.5); $writer->WriteElement($element); // Translate relative to the Blue Circle $gstate->SetTransform(1.0, 0.0, 0.0, 1.0, 113.0, -185.0); $gstate->SetFillColor(new ColorPt(0.0, 1.0, 0.0)); // Green Circle $gstate->SetFillOpacity(0.5); $writer->WriteElement($element); // Translate relative to the Green Circle $gstate->SetTransform(1.0, 0.0, 0.0, 1.0, -220.0, 0.0); $gstate->SetFillColor(new ColorPt(1.0, 0.0, 0.0)); // Red Circle $gstate->SetFillOpacity(0.5);
// Recompress only 1 BPC images
continue;
}
// Skip images that are already compressed using JBIG2
$itr = $obj->Find("Filter");
if ($itr->HasNext() && $itr->Value()->IsName() && $itr->Value()->GetName() == "JBIG2Decode") {
continue;
}
$filter = $obj->GetDecodedStream();
$reader = new FilterReader($filter);
$hint_set = new ObjSet();
// A hint to image encoder to use JBIG2 compression
$hint = $hint_set->CreateArray();
$hint->PushBackName("JBIG2");
$hint->PushBackName("Lossless");
$new_image = Image::Create($cos_doc, $reader, $input_image->GetImageWidth(), $input_image->GetImageHeight(), 1, ColorSpace::CreateDeviceGray(), $hint);
$new_img_obj = $new_image->GetSDFObj();
$itr = $obj->Find("Decode");
if ($itr->HasNext()) {
$new_img_obj->Put("Decode", $itr->Value());
}
$itr = $obj->Find("ImageMask");
if ($itr->HasNext()) {
$new_img_obj->Put("ImageMask", $itr->Value());
}
$itr = $obj->Find("Mask");
if ($itr->HasNext()) {
$new_img_obj->Put("Mask", $itr->Value());
}
$cos_doc->Swap($i, $new_img_obj->GetObjNum());
}