/* ----------------------------------------------------------------- */
///
/// Render
///
/// <summary>
/// Executes the rendering with the specified arguments.
/// </summary>
///
/* ----------------------------------------------------------------- */
private static void Render(IntPtr core, Graphics dest, Page page,
PointF point, SizeF size, int flags)
{
if (core == IntPtr.Zero)
{
return;
}
var n = 5;
var hp = PdfiumApi.FPDF_LoadPage(core, page.Number - 1, n);
if (hp == IntPtr.Zero)
{
throw new LoadException(LoadStatus.PageError);
}
var hdc = dest.GetHdc();
try
{
PdfiumApi.FPDF_RenderPage(
hdc,
hp,
(int)point.X,
(int)point.Y,
(int)size.Width,
(int)size.Height,
GetRotation(page.Delta),
flags,
n
);
}
finally
{
dest.ReleaseHdc(hdc);
PdfiumApi.FPDF_ClosePage(hp);
}
}
/* ----------------------------------------------------------------- */
///
/// GetPage
///
/// <summary>
/// Page オブジェクトを取得します。
/// </summary>
///
/// <param name="index">
/// 最初のページを "ゼロ" とするインデックス
/// </param>
///
/* ----------------------------------------------------------------- */
private Page GetPage(int index)
{
var page = _core.Invoke(e => PdfiumApi.FPDF_LoadPage(e, index, 5));
if (page == IntPtr.Zero)
{
throw _core.GetLastError();
}
try
{
var degree = GetPageRotation(page);
var size = GetPageSize(page, degree);
return(new Page(
File, // File
index + 1, // Number
size, // Size
new Angle(degree), // Rotation
new PointF(72.0f, 72.0f) // Resolution
));
}
finally { PdfiumApi.FPDF_ClosePage(page); }
}
