PeachPDF

PeachDrawing.Core

RasterSurface Class

A premultiplied RGBA8 pixel buffer together with where it sits in the coordinate space of the graphics that created it. Pixel (0, 0) is the top-left; row-major, four bytes per pixel in R, G, B, A order.

public sealed class RasterSurface : System.IDisposable

Inheritance System.Object → RasterSurface

Implements System.IDisposable

Remarks

GridX/GridY place the surface on a pixel grid whose pitch is PixelsPerUnitX pixels per layout unit and whose origin is the local (page) origin. Keeping every surface on that one grid is what makes the physical size of the embedded bitmap exact (each pixel is exactly 1/dpi inch) and lets neighbouring surfaces abut without a seam.

Constructors
RasterSurface(int, int, int, int, double, double)	Creates a cleared, premultiplied-RGBA8 pixel buffer of width x height pixels.

Properties
Bounds	The surface’s pixel rectangle: (0, 0) to (Width, Height).
GridX	The surface’s left edge, in whole pixels of the grid.
GridY	The surface’s top edge, in whole pixels of the grid.
Height	The buffer’s height, in pixels.
LayoutRect	The surface’s rectangle in layout units (the rectangle a bitmap of it must be placed at).
PixelMemory	The surface’s pixels as a System.Memory<>, premultiplied RGBA8, row-major from the top-left; for a caller that cannot hold a System.Span<> (in a lambda, say).
Pixels	The surface’s pixels, premultiplied RGBA8, row-major from the top-left.
PixelsPerUnitX	Pixels per layout unit, horizontally. Equal to PixelsPerUnitY except for a tile, whose pitch is stretched by less than a pixel across its whole width so it covers its requested size exactly.
PixelsPerUnitY	Pixels per layout unit, vertically.
Stride	The number of bytes between the start of one row and the next ( `* 4`).
Width	The buffer’s width, in pixels.

Methods
Clear()	Fills every pixel with transparent black.
Dispose()	Releases the surface’s backing pixel buffer.
Row(int)	The pixels of row y, as a Stride-byte slice of Pixels.