public static void Main()
{
Console.WriteLine("libhpdf-" + HPdfDoc.HPdfGetVersion());
try {
HPdfDoc pdf = new HPdfDoc();
pdf.SetCompressionMode(HPdfDoc.HPDF_COMP_ALL);
/* create default-font */
HPdfFont font = pdf.GetFont("Helvetica", null);
/* add a new page object. */
HPdfPage page = pdf.AddPage();
page.SetWidth(550);
page.SetHeight(500);
HPdfDestination dst = page.CreateDestination();
dst.SetXYZ(0, page.GetHeight(), 1);
pdf.SetOpenAction(dst);
page.BeginText();
page.SetFontAndSize(font, 20);
page.MoveTextPos(220, page.GetHeight() - 70);
page.ShowText("ImageDemo");
page.EndText();
/* load image file. */
HPdfImage image = pdf.LoadPngImageFromFile("pngsuite\\basn3p02.png");
/* image1 is masked by image2. */
HPdfImage image1 = pdf.LoadPngImageFromFile("pngsuite\\basn3p02.png");
/* image2 is a mask image. */
HPdfImage image2 = pdf.LoadPngImageFromFile("pngsuite\\basn0g01.png");
/* image3 is a RGB-color image. we use this image for color-mask
* demo.
*/
HPdfImage image3 = pdf.LoadPngImageFromFile("pngsuite\\maskimage.png");
float iw = image.GetWidth();
float ih = image.GetHeight();
page.SetLineWidth(0.5f);
float x = 100;
float y = page.GetHeight() - 150;
/* Draw image to the canvas. (normal-mode with actual size.)*/
page.DrawImage(image, x, y, iw, ih);
ShowDescription(page, x, y, "Actual Size");
x += 150;
/* Scalling image (X direction) */
page.DrawImage(image, x, y, iw * 1.5f, ih);
ShowDescription(page, x, y, "Scalling image (X direction)");
x += 150;
/* Scalling image (Y direction). */
page.DrawImage(image, x, y, iw, ih * 1.5f);
ShowDescription(page, x, y, "Scalling image (Y direction)");
x = 100;
y -= 120;
/* Skewing image. */
float angle1 = 10;
float angle2 = 20;
float rad1 = angle1 / 180 * 3.141592f;
float rad2 = angle2 / 180 * 3.141592f;
page.GSave();
page.Concat(iw, (float)Math.Tan(rad1) * iw, (float)Math.Tan(rad2) * ih,
ih, x, y);
page.ExecuteXObject(image);
page.GRestore();
ShowDescription(page, x, y, "Skewing image");
x += 150;
/* Rotating image */
float angle = 30; /* rotation of 30 degrees. */
float rad = angle / 180 * 3.141592f; /* Calcurate the radian value. */
page.GSave();
page.Concat((float)(iw * Math.Cos(rad)),
(float)(iw * Math.Sin(rad)),
(float)(ih * -Math.Sin(rad)),
(float)(ih * Math.Cos(rad)),
x, y);
page.ExecuteXObject(image);
page.GRestore();
ShowDescription(page, x, y, "Rotating image");
x += 150;
/* draw masked image. */
/* Set image2 to the mask image of image1 */
image1.SetMaskImage(image2);
page.SetRGBFill(0, 0, 0);
page.BeginText();
page.MoveTextPos(x - 6, y + 14);
page.ShowText("MASKMASK");
page.EndText();
page.DrawImage(image1, x - 3, y - 3, iw + 6, ih + 6);
ShowDescription(page, x, y, "masked image");
x = 100;
y -= 120;
/* color mask. */
page.SetRGBFill(0, 0, 0);
page.BeginText();
page.MoveTextPos(x - 6, y + 14);
page.ShowText("MASKMASK");
page.EndText();
image3.SetColorMask(0, 255, 0, 0, 0, 255);
page.DrawImage(image3, x, y, iw, ih);
ShowDescription(page, x, y, "Color Mask");
/* save the document to a file */
pdf.SaveToFile("ImageDemo.pdf");
} catch (Exception e) {
Console.Error.WriteLine(e.Message);
}
}