/// <summary>
/// Renders a page of the PDF document to the provided graphics instance.
/// </summary>
/// <param name="page">Number of the page to render.</param>
/// <param name="graphics">Graphics instance to render the page on.</param>
/// <param name="dpiX">Horizontal DPI.</param>
/// <param name="dpiY">Vertical DPI.</param>
/// <param name="bounds">Bounds to render the page in.</param>
/// <param name="flags">Flags used to influence the rendering.</param>
public void Render(int page, Graphics graphics, float dpiX, float dpiY, Rectangle bounds, PdfRenderFlags flags)
{
if (graphics == null)
{
throw new ArgumentNullException("graphics");
}
if (_disposed)
{
throw new ObjectDisposedException(GetType().Name);
}
float graphicsDpiX = graphics.DpiX;
float graphicsDpiY = graphics.DpiY;
var dc = graphics.GetHdc();
try
{
if ((int)graphicsDpiX != (int)dpiX || (int)graphicsDpiY != (int)dpiY)
{
var transform = new NativeMethods.XFORM
{
eM11 = graphicsDpiX / dpiX,
eM22 = graphicsDpiY / dpiY
};
NativeMethods.SetGraphicsMode(dc, NativeMethods.GM_ADVANCED);
NativeMethods.ModifyWorldTransform(dc, ref transform, NativeMethods.MWT_LEFTMULTIPLY);
}
var point = new NativeMethods.POINT();
NativeMethods.SetViewportOrgEx(dc, bounds.X, bounds.Y, out point);
bool success = _file.RenderPDFPageToDC(
page,
dc,
(int)dpiX, (int)dpiY,
0, 0, bounds.Width, bounds.Height,
FlagsToFPDFFlags(flags)
);
NativeMethods.SetViewportOrgEx(dc, point.X, point.Y, out point);
if (!success)
{
throw new Win32Exception();
}
}
finally
{
graphics.ReleaseHdc(dc);
}
}
/// <summary>
/// Renders a page of the PDF document to the provided graphics instance.
/// </summary>
/// <param name="page">Number of the page to render.</param>
/// <param name="graphics">Graphics instance to render the page on.</param>
/// <param name="dpiX">Horizontal DPI.</param>
/// <param name="dpiY">Vertical DPI.</param>
/// <param name="bounds">Bounds to render the page in.</param>
/// <param name="forPrinting">Render the page for printing.</param>
public void Render(int page, Graphics graphics, float dpiX, float dpiY, Rectangle bounds, bool forPrinting)
{
if (graphics == null)
{
throw new ArgumentNullException("graphics");
}
if (_disposed)
{
throw new ObjectDisposedException(GetType().Name);
}
float graphicsDpiX = graphics.DpiX;
float graphicsDpiY = graphics.DpiY;
var dc = graphics.GetHdc();
try
{
if ((int)graphicsDpiX != (int)dpiX || (int)graphicsDpiY != (int)dpiY)
{
var transform = new NativeMethods.XFORM
{
eM11 = graphicsDpiX / dpiX,
eM22 = graphicsDpiY / dpiY
};
NativeMethods.SetGraphicsMode(dc, NativeMethods.GM_ADVANCED);
NativeMethods.ModifyWorldTransform(dc, ref transform, NativeMethods.MWT_LEFTMULTIPLY);
}
bool success = _file.RenderPDFPageToDC(
page,
dc,
(int)dpiX, (int)dpiY,
bounds.X, bounds.Y, bounds.Width, bounds.Height,
true /* fitToBounds */,
true /* stretchToBounds */,
true /* keepAspectRatio */,
true /* centerInBounds */,
true /* autoRotate */,
forPrinting
);
if (!success)
{
throw new Win32Exception();
}
}
finally
{
graphics.ReleaseHdc(dc);
}
}
/// <summary>
/// Renders a page of the PDF document to the provided graphics instance.
/// </summary>
/// <param name="page">Number of the page to render.</param>
/// <param name="graphics">Graphics instance to render the page on.</param>
/// <param name="dpiX">Horizontal DPI.</param>
/// <param name="dpiY">Vertical DPI.</param>
/// <param name="bounds">Bounds to render the page in.</param>
/// <param name="flags">Flags used to influence the rendering.</param>
public void Render(int page, Graphics graphics, float dpiX, float dpiY, Rectangle bounds, PdfRenderFlags flags)
{
if (graphics == null)
throw new ArgumentNullException("graphics");
if (_disposed)
throw new ObjectDisposedException(GetType().Name);
float graphicsDpiX = graphics.DpiX;
float graphicsDpiY = graphics.DpiY;
var dc = graphics.GetHdc();
try
{
if ((int)graphicsDpiX != (int)dpiX || (int)graphicsDpiY != (int)dpiY)
{
var transform = new NativeMethods.XFORM
{
eM11 = graphicsDpiX / dpiX,
eM22 = graphicsDpiY / dpiY
};
NativeMethods.SetGraphicsMode(dc, NativeMethods.GM_ADVANCED);
NativeMethods.ModifyWorldTransform(dc, ref transform, NativeMethods.MWT_LEFTMULTIPLY);
}
var point = new NativeMethods.POINT();
NativeMethods.SetViewportOrgEx(dc, bounds.X, bounds.Y, out point);
bool success = _file.RenderPDFPageToDC(
page,
dc,
(int)dpiX, (int)dpiY,
0, 0, bounds.Width, bounds.Height,
FlagsToFPDFFlags(flags)
);
NativeMethods.SetViewportOrgEx(dc, point.X, point.Y, out point);
if (!success)
throw new Win32Exception();
}
finally
{
graphics.ReleaseHdc(dc);
}
}
/// <summary>
/// Renders a page of the PDF document to an image.
/// </summary>
/// <param name="page">Number of the page to render.</param>
/// <param name="width">Width of the rendered image.</param>
/// <param name="height">Height of the rendered image.</param>
/// <param name="dpiX">Horizontal DPI.</param>
/// <param name="dpiY">Vertical DPI.</param>
/// <param name="forPrinting">Render the page for printing.</param>
/// <returns>The rendered image.</returns>
public Image Render(int page, int width, int height, float dpiX, float dpiY, bool forPrinting)
{
if (_disposed)
{
throw new ObjectDisposedException(GetType().Name);
}
var dc = NativeMethods.CreateCompatibleDC(IntPtr.Zero);
try
{
int dcDpiX = NativeMethods.GetDeviceCaps(dc, NativeMethods.LOGPIXELSX);
int dcDpiY = NativeMethods.GetDeviceCaps(dc, NativeMethods.LOGPIXELSY);
if (dcDpiX != (int)dpiX || dcDpiY != (int)dpiY)
{
var transform = new NativeMethods.XFORM
{
eM11 = dcDpiX / dpiX,
eM22 = dcDpiY / dpiY
};
NativeMethods.SetGraphicsMode(dc, NativeMethods.GM_ADVANCED);
NativeMethods.ModifyWorldTransform(dc, ref transform, NativeMethods.MWT_LEFTMULTIPLY);
}
var bitmap = NativeMethods.CreateCompatibleBitmap(NativeMethods.GetDC(IntPtr.Zero), width, height);
try
{
var oldBitmap = NativeMethods.SelectObject(dc, bitmap);
try
{
var brush = NativeMethods.CreateSolidBrush(ColorTranslator.ToWin32(Color.White));
try
{
var oldBrush = NativeMethods.SelectObject(dc, brush);
try
{
NativeMethods.Rectangle(dc, 0, 0, width, height);
}
finally
{
NativeMethods.SelectObject(dc, oldBrush);
}
}
finally
{
NativeMethods.DeleteObject(brush);
}
// _file is an instance of PdfFile from PdfViewer port
// Now render the page onto the memory DC, which in turn changes the bitmap
bool success = _file.RenderPDFPageToDC(
page,
dc,
(int)dpiX, (int)dpiY,
0, 0, width, height,
true /* fitToBounds */,
true /* stretchToBounds */,
true /* keepAspectRatio */,
true /* centerInBounds */,
true /* autoRotate */,
forPrinting
);
if (!success)
{
throw new Win32Exception();
}
}
finally
{
NativeMethods.SelectObject(dc, oldBitmap);
}
return(Bitmap.FromHbitmap(bitmap));
}
finally
{
NativeMethods.DeleteObject(bitmap);
}
}
finally
{
NativeMethods.DeleteObject(dc);
}
}
