public static void Run(
String openPath, // source PDF document
String savePath, // output PDF document
String imgPath // watermark to apply
)
{
Pdfix pdfix = PdfixEngine.Instance;
PdfDoc doc = pdfix.OpenDoc(openPath, "");
if (doc == null)
{
throw new Exception(pdfix.GetError());
}
// identify image format from file path
PdfImageFormat format = PdfImageFormat.kImageFormatJpg;
if (Path.GetExtension(imgPath).ToLower() == ".png")
{
format = PdfImageFormat.kImageFormatPng;
}
// load image file data into memory stream
byte[] bytes = File.ReadAllBytes(imgPath);
var memStm = pdfix.CreateMemStream();
if (memStm == null)
{
throw new Exception(pdfix.GetError());
}
memStm.Write(0, bytes);
// create XObject from the image
var image_obj = doc.CreateXObjectFromImage(memStm, format);
if (image_obj == null)
{
throw new Exception(pdfix.GetError());
}
// add annotation on the first page
var page = doc.AcquirePage(0);
if (page == null)
{
throw new Exception(pdfix.GetError());
}
var page_view = page.AcquirePageView(1, PdfRotate.kRotate0);
if (page_view == null)
{
throw new Exception(pdfix.GetError());
}
// rect for the new annotation
PdfRect annot_rect = new PdfRect()
{
left = 100,
right = 300,
bottom = 100,
top = 200
};
PdfAnnot annot = page.CreateAnnot(PdfAnnotSubtype.kAnnotStamp, annot_rect);
page.AddAnnot(0, annot);
// create content
var content = doc.CreateContent();
// add image to content
var xobjdict = image_obj.GetStreamDict();
var width = xobjdict.GetNumber("Width");
var height = xobjdict.GetNumber("Height");
var ratio = height / width;
var res_width = annot_rect.right - annot_rect.left;
var res_height = res_width * ratio;
var center_adj = ((annot_rect.top - annot_rect.bottom) - res_height) / 2;
var imageobject = content.AddNewImage(-1, image_obj, new PdfMatrix(res_width, 0, 0, res_height, 0, center_adj));
PdfGraphicState imageGs = new PdfGraphicState();
imageGs.color_state.fill_opacity = 255;
imageobject.SetGState(imageGs);
// create text state
PdfTextState textState = new PdfTextState();
var colorSpace = doc.CreateColorSpace(PdfColorSpaceFamily.kColorSpaceDeviceRGB);
var fontName = "Segoe UI";
var fn = fontName.Trim();
var sysFont = pdfix.FindSysFont(fn, 0, PdfFontCodepage.kFontDefANSICodepage);
if (sysFont == null)
{
throw new Exception(pdfix.GetError());
}
textState.font = doc.CreateFont(sysFont, PdfFontCharset.kFontAnsiCharset, 0);
sysFont.Destroy();
if (textState.font == null)
{
throw new Exception(pdfix.GetError());
}
textState.font_size = 11;
textState.color_state.fill_type = PdfFillType.kFillTypeSolid;
var fill_color = colorSpace.CreateColor();
fill_color.SetValue(0, 0.5f);
fill_color.SetValue(1, 0.5f);
fill_color.SetValue(2, 0.5f);
textState.color_state.fill_color = fill_color;
textState.color_state.fill_opacity = 255;
textState.color_state.stroke_type = PdfFillType.kFillTypeSolid;
var stroke_color = colorSpace.CreateColor();
stroke_color.SetValue(0, 0);
stroke_color.SetValue(1, 0);
stroke_color.SetValue(2, 0);
textState.color_state.stroke_color = stroke_color;
textState.color_state.stroke_opacity = 255;
textState.char_spacing = 2;
// add text to content
var line = "test text in appearance";
var textObject = content.AddNewText(-1, textState.font, new PdfMatrix(1, 0, 0, 1, 10, 10));
if (textObject == null)
{
throw new Exception(pdfix.GetError());
}
textObject.SetTextState(textState);
textObject.SetText(line);
// set annotation appearance
PdsContentParams contentParams = new PdsContentParams();
contentParams.bbox = new PdfRect(annot_rect.right - annot_rect.left, 0, 0, annot_rect.top - annot_rect.bottom);
contentParams.matrix = new PdfMatrix(1, 0, 0, 1, 0, 0);
contentParams.form_type = 1;
contentParams.flags = 2;
var appearance_stream = content.ToObject(doc, contentParams);
annot.SetAppearanceFromXObject(appearance_stream, PdfAnnotAppearanceMode.kAppearanceNormal);
page.Release();
// save document
if (!doc.Save(savePath, Pdfix.kSaveFull))
{
throw new Exception(pdfix.GetError());
}
doc.Close();
}
public static void Run(
String openPath, // source PDF document
String savePath, // output PDF document
String imgPath // watermark to apply
)
{
Pdfix pdfix = PdfixEngine.Instance;
PdfDoc doc = pdfix.OpenDoc(openPath, "");
if (doc == null)
{
throw new Exception(pdfix.GetError());
}
// identify image format from file path
PdfImageFormat format = PdfImageFormat.kImageFormatJpg;
if (Path.GetExtension(imgPath).ToLower() == ".png")
{
format = PdfImageFormat.kImageFormatPng;
}
// load image file data into memory stream
byte[] bytes = File.ReadAllBytes(imgPath);
var memStm = pdfix.CreateMemStream();
if (memStm == null)
{
throw new Exception(pdfix.GetError());
}
memStm.Write(0, bytes);
// create XObject from the image
var image_obj = doc.CreateXObjectFromImage(memStm, format);
if (image_obj == null)
{
throw new Exception(pdfix.GetError());
}
// find or add annotation on the first page
var page = doc.AcquirePage(0);
if (page == null)
{
throw new Exception(pdfix.GetError());
}
PdfAnnot annot = null;// page.GetAnnot(0);
if (annot == null)
{
// create new annotation
var page_view = page.AcquirePageView(1, PdfRotate.kRotate0);
if (page_view == null)
{
throw new Exception(pdfix.GetError());
}
// rect for the new annotation
PdfRect annot_rect = new PdfRect()
{
left = 100,
right = 300,
bottom = 100,
top = 200
};
annot = page.CreateAnnot(PdfAnnotSubtype.kAnnotStamp, annot_rect);
page.AddAnnot(0, annot);
}
// set annotation appearance
if (!annot.SetAppearanceFromXObject(image_obj, PdfAnnotAppearanceMode.kAppearanceNormal))
{
throw new Exception(pdfix.GetError());
}
page.Release();
// save document
if (!doc.Save(savePath, Pdfix.kSaveFull))
{
throw new Exception(pdfix.GetError());
}
doc.Close();
}
public static void Run(
String openPath, // source PDF document
String savePath, // output PDF document
String imgPath, // watermark to apply
int start_page, // start page number
int end_page, // end page number
int order_top, // number specifying where in the page z-order the watermark should be added
bool percentage_vals, // boolean specifying the units of horizValue and vertValue
PdfAlignment h_align, // the horizontal alignment to be used when adding the watermark to a page
PdfAlignment v_align, // the vertical alignment to be used when adding the watermark to a page
float h_value, // the horizontal offset value to be used when adding the watermark on a page
float v_value, // the vertical offset value to be used when adding the watermark on a page
float scale, // the scale factor to be used when adding the watermark, with 1.0 meaning 100%
float rotation, // the counter-clockwise rotation, in degrees, to be used when adding the watermark
float opacity // the opacity to be used when adding the watermark
)
{
Pdfix pdfix = PdfixEngine.Instance;
PdfDoc doc = pdfix.OpenDoc(openPath, "");
if (doc == null)
{
throw new Exception(pdfix.GetError());
}
var img_stm = pdfix.CreateFileStream(imgPath, PsFileMode.kPsReadOnly);
if (img_stm == null)
{
throw new Exception(pdfix.GetError());
}
// identify image format from file path
PdfImageFormat format = PdfImageFormat.kImageFormatJpg;
if (Path.GetExtension(imgPath).ToLower() == ".png")
{
format = PdfImageFormat.kImageFormatPng;
}
var image_obj = doc.CreateXObjectFromImage(img_stm, format);
if (image_obj == null)
{
throw new Exception(pdfix.GetError());
}
var page_num = doc.GetNumPages();
if (end_page == -1 || end_page >= page_num)
{
end_page = page_num - 1;
}
if (start_page >= page_num || end_page < start_page)
{
throw new Exception("Page number out of range");
}
for (int i = start_page; i <= end_page; i++)
{
var page = doc.AcquirePage(i);
if (page == null)
{
throw new Exception(pdfix.GetError());
}
var content = page.GetContent();
if (content == null)
{
throw new Exception(pdfix.GetError());
}
var xobjdict = image_obj.GetStreamDict();
var width = xobjdict.GetNumber("Width");
var height = xobjdict.GetNumber("Height");
// prepare the matrix
var page_mx = page.GetDefaultMatrix();
var crop_rect = page.GetCropBox();
PdfMatrix page_mx_rev = Utils.PdfMatrixInverse(page_mx);
// scale
var width_scaled = width * scale;
var height_scaled = height * scale;
var matrix = new PdfMatrix(width_scaled, 0, 0, height_scaled, 0, 0);
if (rotation != 0.0f)
{
matrix = Utils.PdfMatrixTranslate(matrix, -width_scaled / 2, -height_scaled / 2, false);
matrix = Utils.PdfMatrixRotate(matrix, (rotation / 180.0f) * Utils.kPi, false);
matrix = Utils.PdfMatrixTranslate(matrix, width_scaled / 2, height_scaled / 2, false);
}
// horizontal align
var rect_h = crop_rect.right - crop_rect.left;
var rect_v = crop_rect.top - crop_rect.bottom;
if (h_align == PdfAlignment.kAlignmentCenter)
{
matrix = Utils.PdfMatrixTranslate(matrix, (rect_h - width_scaled) / 2, 0.0f, false);
}
else if (h_align == PdfAlignment.kAlignmentRight)
{
matrix = Utils.PdfMatrixTranslate(matrix, (rect_h - width_scaled), 0.0f, false);
}
// vertical align
if (v_align == PdfAlignment.kAlignmentCenter)
{
matrix = Utils.PdfMatrixTranslate(matrix, 0.0f, (rect_v - height_scaled) / 2, false);
}
else if (v_align == PdfAlignment.kAlignmentTop)
{
matrix = Utils.PdfMatrixTranslate(matrix, 0.0f, (rect_v - height_scaled), false);
}
// horizontal and vertical offset
var offs_h = percentage_vals ? rect_h * h_value : h_value;
var offs_v = percentage_vals ? rect_v * v_value : v_value;
//-offs_v because y coordinate from top to bottom
matrix = Utils.PdfMatrixTranslate(matrix, offs_h, -offs_v, false);
var position = order_top == 1 ? -1 : 0;
var imageobject = content.AddNewImage(position, image_obj, matrix);
// set opacity of the image 0-255
var graphicState = imageobject.GetGState();
graphicState.color_state.fill_opacity = (int)(opacity * 255);
imageobject.SetGState(graphicState);
page.SetContent();
page.Release();
}
if (!doc.Save(savePath, Pdfix.kSaveFull))
{
throw new Exception(pdfix.GetError());
}
doc.Close();
}