Documentation

Overview

    Package paint provides drawing operations for 2D graphics.

    The PaintOp operation fills the current clip with the current brush, taking the current transformation into account.

    The current brush is set by either a ColorOp for a constant color, or ImageOp for an image, or LinearGradientOp for gradients.

    All color.NRGBA values are in the sRGB color space.

    Index

    Constants

    This section is empty.

    Variables

    This section is empty.

    Functions

    func Fill

    func Fill(ops *op.Ops, c color.NRGBA)

      Fill paints an infinitely large plane with the provided color. It is intended to be used with a clip.Op already in place to limit the painted area. Use FillShape unless you need to paint several times within the same clip.Op.

      func FillShape

      func FillShape(ops *op.Ops, c color.NRGBA, shape clip.Op)

        FillShape fills the clip shape with a color.

        Types

        type ColorOp

        type ColorOp struct {
        	Color color.NRGBA
        }

          ColorOp sets the brush to a constant color.

          func (ColorOp) Add

          func (c ColorOp) Add(o *op.Ops)

          type ImageOp

          type ImageOp struct {
          	// contains filtered or unexported fields
          }

            ImageOp sets the brush to an image.

            Note: the ImageOp may keep a reference to the backing image. See NewImageOp for details.

            func NewImageOp

            func NewImageOp(src image.Image) ImageOp

              NewImageOp creates an ImageOp backed by src. See gioui.org/io/system.FrameEvent for a description of when data referenced by operations is safe to re-use.

              NewImageOp assumes the backing image is immutable, and may cache a copy of its contents in a GPU-friendly way. Create new ImageOps to ensure that changes to an image is reflected in the display of it.

              func (ImageOp) Add

              func (i ImageOp) Add(o *op.Ops)

              func (ImageOp) Size

              func (i ImageOp) Size() image.Point

              type LinearGradientOp

              type LinearGradientOp struct {
              	Stop1  f32.Point
              	Color1 color.NRGBA
              	Stop2  f32.Point
              	Color2 color.NRGBA
              }

                LinearGradientOp sets the brush to a gradient starting at stop1 with color1 and ending at stop2 with color2.

                func (LinearGradientOp) Add

                func (c LinearGradientOp) Add(o *op.Ops)

                type PaintOp

                type PaintOp struct {
                }

                  PaintOp fills fills the current clip area with the current brush.

                  func (PaintOp) Add

                  func (d PaintOp) Add(o *op.Ops)

                  Source Files