graphicscommand

func (*Image) Dispose ¶

func (i *Image) Dispose()

func (*Image) DrawTriangles ¶ added in v1.10.0

func (i *Image) DrawTriangles(srcs [graphics.ShaderImageNum]*Image, offsets [graphics.ShaderImageNum - 1][2]float32, vertices []float32, indices []uint16, clr *affine.ColorM, mode driver.CompositeMode, filter driver.Filter, address driver.Address, sourceRegion driver.Region, shader *Shader, uniforms []interface{})

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 (not texels!)
3: Source Y in pixels
4: Color R [0.0-1.0]
5: Color G
6: Color B
7: Color Y

src and shader are exclusive and only either is non-nil.

The elements that index is in between 2 and 7 are used for the source images. The source image is 1) src argument if non-nil, or 2) an image value in the uniform variables if it exists. If there are multiple images in the uniform variables, the smallest ID's value is adopted.

If the source image is not specified, i.e., src is nil and there is no image in the uniform variables, the elements for the source image are not used.

func (*Image) Dump ¶ added in v1.10.0

func (i *Image) Dump(path string, blackbg bool) error

Dump dumps the image to the specified path. In the path, '*' is replaced with the image's ID.

If blackbg is true, any alpha values in the dumped image will be 255.

This is for testing usage.

func (*Image) InternalSize ¶ added in v1.10.0

func (i *Image) InternalSize() (int, int)

func (*Image) IsInvalidated ¶

func (i *Image) IsInvalidated() bool

func (*Image) Pixels ¶

func (i *Image) Pixels() ([]byte, error)

Pixels returns the image's pixels. Pixels might return nil when OpenGL error happens.

func (*Image) ReplacePixels ¶

func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int)

func (*Shader) Dispose ¶ added in v1.12.0

func (s *Shader) Dispose()