shareable

Documentation

Index

• Constants
• func BeginFrame() error
• func DumpImages(dir string) error
• func EndFrame() error
• func SetGraphicsDriver(graphics driver.Graphics)
• type Image
  • func NewImage(width, height int, volatile bool) *Image
  • func NewScreenFramebufferImage(width, height int) *Image
  • func (i *Image) At(x, y int) (byte, byte, byte, byte)
  • func (i *Image) ClearFramebuffer()
  • func (i *Image) DrawTriangles(img *Image, vertices []float32, indices []uint16, colorm *affine.ColorM, ...)
  • func (i *Image) Dump(path string) error
  • func (i *Image) Fill(clr color.RGBA)
  • func (i *Image) MarkDisposed()
  • func (i *Image) ReplacePixels(p []byte)

Constants

const MaxCountForShare = 10

MaxCountForShare represents the time duration when the image can become shared.

This value is exported for testing.

Functions

func BeginFrame

func BeginFrame() error

func DumpImages

func DumpImages(dir string) error

func EndFrame

func EndFrame() error

func SetGraphicsDriver

func SetGraphicsDriver(graphics driver.Graphics)

Types

type Image

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

func NewImage

func NewImage(width, height int, volatile bool) *Image

func NewScreenFramebufferImage

func NewScreenFramebufferImage(width, height int) *Image

func (*Image) At

func (i *Image) At(x, y int) (byte, byte, byte, byte)

func (*Image) ClearFramebuffer

func (i *Image) ClearFramebuffer()

ClearFramebuffer clears the image with a color. This affects not only the (0, 0)-(width, height) region but also the whole framebuffer region.

func (*Image) DrawTriangles

func (i *Image) DrawTriangles(img *Image, vertices []float32, indices []uint16, colorm *affine.ColorM, mode driver.CompositeMode, filter driver.Filter, address driver.Address)

DrawTriangles draws triangles with the given image.

The vertex floats are:

0:  Destination X in pixels
1:  Destination Y in pixels
2:  Source X in pixels (the upper-left is (0, 0))
3:  Source Y in pixels
4:  Bounds of the source min X in pixels
5:  Bounds of the source min Y in pixels
6:  Bounds of the source max X in pixels
7:  Bounds of the source max Y in pixels
8:  Color R [0.0-1.0]
9:  Color G
10: Color B
11: Color Y

func (*Image) Dump

func (i *Image) Dump(path string) error

func (*Image) Fill

func (i *Image) Fill(clr color.RGBA)

func (*Image) MarkDisposed

func (i *Image) MarkDisposed()

MarkDisposed marks the image as disposed. The actual operation is deferred. MarkDisposed can be called from finalizers.

A function from finalizer must not be blocked, but disposing operation can be blocked. Defer this operation until it becomes safe. (#913)

func (*Image) ReplacePixels

func (i *Image) ReplacePixels(p []byte)