`RImage` class

public static class RImage

Controls drawn into bitmaps.

Methods

static RenderTargetBitmap Render(Control c, double width, double height, double dpi = 96): The control drawn at width × height dip and the given dpi (96 for the screen, 300 for print).
static RenderTargetBitmap SavePng(Control c, string path, double width, double height, double dpi = 96): The control saved as PNG; returns the bitmap.
static void SetDpi(string path, double dpi): Writes the resolution into a PNG file (its pHYs chunk, in pixels per metre), replacing the one that is there: page layout programs then place the figure at its true size.
static double Dpi(string path): The resolution written in a PNG (NaN if it has no pHYs in metres).
static double Dip(double cm): The width in dip of a figure that prints cm centimetres wide.