PDFRasterizerRasterize Method

public void Rasterize(
	Page page,
	ByteArrayRef in_out_image_buffer,
	int width,
	int height,
	int stride,
	int num_comps,
	bool demult,
	Matrix2D device_mtx,
	Rect clip
)

Public Sub Rasterize ( 
	page As Page,
	in_out_image_buffer As ByteArrayRef,
	width As Integer,
	height As Integer,
	stride As Integer,
	num_comps As Integer,
	demult As Boolean,
	device_mtx As Matrix2D,
	clip As Rect
)

public:
virtual void Rasterize(
	[InAttribute] Page^ page, 
	[InAttribute] ByteArrayRef^ in_out_image_buffer, 
	[InAttribute] int width, 
	[InAttribute] int height, 
	[InAttribute] int stride, 
	[InAttribute] int num_comps, 
	[InAttribute] bool demult, 
	[InAttribute] Matrix2D^ device_mtx, 
	[InAttribute] Rect^ clip
) sealed

function Rasterize(page, in_out_image_buffer, width, height, stride, num_comps, demult, device_mtx, clip);

float drawingScale = 2;
Matrix2D matrix = new Matrix2D(drawingScale, 0, 0, drawingScale, 0, 0);
var bbox = pdf_page.GetMediaBox();
bbox.Normalize();
int width = (int)(bbox.Width() * drawingScale);
int height = (int)(bbox.Height() * drawingScale);

// Stride is represented in bytes and is aligned on 4 byte
// boundary so that you can render directly to GDI bitmap.
// A negative value for stride can be used to flip the image
// upside down.
int comps = 4;  // for BGRA 
int stride = ((width * comps + 3) / 4) * 4;
ByteArrayRef buf1 = new ByteArrayRef(stride * height);
PDFRasterizer rast = new PDFRasterizer();
rast.Rasterize(pdf_page, buf1, width, height, stride, 4, false, matrix, null);
byte[] bytes = buf1.Value;

WriteableBitmap wb = new WriteableBitmap(width, height);
// Note that AsStream() requires using System.Runtime.InteropServices.WindowsRuntime 
System.IO.Stream pixelStream = wb.PixelBuffer.AsStream();
pixelStream.Seek(0, System.IO.SeekOrigin.Begin);
pixelStream.Write(bytes, 0, bytes.Length);