util

Documentation

Index

• func AutoCrop(img *image.Paletted) image.Image
• func ClonePalette(p color.Palette) color.Palette
• func DrawDistortion(screen *ebiten.Image, page *ebiten.Image, source *ebiten.Image, ...)
• func DrawOutline(screen *ebiten.Image, imageCache *ImageCache, pic *ebiten.Image, x float64, ...)
• func DrawRect(screen *ebiten.Image, rect image.Rectangle, color_ color.Color)
• func DrawTextCursor(screen *ebiten.Image, source *ebiten.Image, cursorX float64, y float64, ...)
• func First[T any](slice []T, default_ T) T
• func ImageRect(x int, y int, img *ebiten.Image) image.Rectangle
• func Lighten(c color.Color, amount float64) color.Color
• func PremultiplyAlpha(c color.RGBA) color.RGBA
• func RotateHue(c color.RGBA, radian float64) color.Color
• func RotateSlice[T any](slice []T, forward bool)
• type AlphaFadeFunc
  • func MakeFadeIn(time uint64, counter *uint64) AlphaFadeFunc
  • func MakeFadeOut(time uint64, counter *uint64) AlphaFadeFunc
• type Animation
  • func MakeAnimation(frames []*ebiten.Image, loop bool) *Animation
  • func MakePaletteRotateAnimation(lbxFile *lbx.LbxFile, index int, rotateIndexLow int, rotateIndexHigh int) *Animation
  • func MakeRepeatAnimation(frames []*ebiten.Image, repeats int) *Animation
  • func MakeReverseAnimation(frames []*ebiten.Image, loop bool) *Animation
  • func (animation *Animation) Done() bool
  • func (animation *Animation) Frame() *ebiten.Image
  • func (animation *Animation) Next() bool
• type Distortion
• type ImageCache
  • func MakeImageCache(lbxCache *lbx.LbxCache) ImageCache
  • func (cache *ImageCache) Clear()
  • func (cache *ImageCache) GetImage(lbxFile string, spriteIndex int, animationIndex int) (*ebiten.Image, error)
  • func (cache *ImageCache) GetImageTransform(lbxFile string, spriteIndex int, animationIndex int, extra string, ...) (*ebiten.Image, error)
  • func (cache *ImageCache) GetImages(lbxPath string, index int) ([]*ebiten.Image, error)
  • func (cache *ImageCache) GetImagesTransform(lbxPath string, index int, extra string, transform ImageTransformFunc) ([]*ebiten.Image, error)
  • func (cache *ImageCache) GetShader(shader shaders.Shader) (*ebiten.Shader, error)
• type ImageTransformFunc
• type Segment

Functions

func AutoCrop

func AutoCrop(img *image.Paletted) image.Image

remove all alpha-0 pixels from the border of the image

func ClonePalette

func ClonePalette(p color.Palette) color.Palette

func DrawDistortion

func DrawDistortion(screen *ebiten.Image, page *ebiten.Image, source *ebiten.Image, distortion Distortion, options ebiten.DrawImageOptions)

draw 'source' onto 'screen' with a distortion effect * for each segment in 'distortion', make a quad from 'source' where the width is 'source width' / segments in the distortion * the distortion segments define where to place each corner of the quad

func DrawOutline

func DrawOutline(screen *ebiten.Image, imageCache *ImageCache, pic *ebiten.Image, x float64, y float64, time uint64, baseColor color.Color)

func DrawRect

func DrawRect(screen *ebiten.Image, rect image.Rectangle, color_ color.Color)

func DrawTextCursor

func DrawTextCursor(screen *ebiten.Image, source *ebiten.Image, cursorX float64, y float64, counter uint64)

func First

func First[T any](slice []T, default_ T) T

func ImageRect

func ImageRect(x int, y int, img *ebiten.Image) image.Rectangle

func Lighten

func Lighten(c color.Color, amount float64) color.Color

func PremultiplyAlpha

func PremultiplyAlpha(c color.RGBA) color.RGBA

func RotateHue

func RotateHue(c color.RGBA, radian float64) color.Color

func RotateSlice

func RotateSlice[T any](slice []T, forward bool)

Types

type AlphaFadeFunc

type AlphaFadeFunc func() float32

func MakeFadeIn

func MakeFadeIn(time uint64, counter *uint64) AlphaFadeFunc

func MakeFadeOut

func MakeFadeOut(time uint64, counter *uint64) AlphaFadeFunc

type Animation

type Animation struct {
	Frames       []*ebiten.Image
	CurrentFrame int
	Repeat       int
	// contains filtered or unexported fields
}

func MakeAnimation

func MakeAnimation(frames []*ebiten.Image, loop bool) *Animation

func MakePaletteRotateAnimation

func MakePaletteRotateAnimation(lbxFile *lbx.LbxFile, index int, rotateIndexLow int, rotateIndexHigh int) *Animation

create an animation by rotating the colors in a palette for a given lbx/index pair. * all the colors between indexLow and indexHigh will be rotated once in the animation

func MakeRepeatAnimation

func MakeRepeatAnimation(frames []*ebiten.Image, repeats int) *Animation

func MakeReverseAnimation

func MakeReverseAnimation(frames []*ebiten.Image, loop bool) *Animation

func (*Animation) Done

func (animation *Animation) Done() bool

func (*Animation) Frame

func (animation *Animation) Frame() *ebiten.Image

func (*Animation) Next

func (animation *Animation) Next() bool

returns true if there are frames left, otherwise false

type Distortion

type Distortion struct {
	Segments []Segment
	Top      image.Point
	Bottom   image.Point
}

type ImageCache

type ImageCache struct {
	LbxCache *lbx.LbxCache
	// FIXME: have some limit on the number of entries, and remove old ones LRU-style
	Cache map[string][]*ebiten.Image

	ShaderCache map[shaders.Shader]*ebiten.Shader
}

func MakeImageCache

func MakeImageCache(lbxCache *lbx.LbxCache) ImageCache

func (*ImageCache) Clear

func (cache *ImageCache) Clear()

remove all entries from the cache

func (*ImageCache) GetImage

func (cache *ImageCache) GetImage(lbxFile string, spriteIndex int, animationIndex int) (*ebiten.Image, error)

func (*ImageCache) GetImageTransform

func (cache *ImageCache) GetImageTransform(lbxFile string, spriteIndex int, animationIndex int, extra string, transform ImageTransformFunc) (*ebiten.Image, error)

func (*ImageCache) GetImages

func (cache *ImageCache) GetImages(lbxPath string, index int) ([]*ebiten.Image, error)

func (*ImageCache) GetImagesTransform

func (cache *ImageCache) GetImagesTransform(lbxPath string, index int, extra string, transform ImageTransformFunc) ([]*ebiten.Image, error)

func (*ImageCache) GetShader

func (cache *ImageCache) GetShader(shader shaders.Shader) (*ebiten.Shader, error)

type ImageTransformFunc

type ImageTransformFunc func(*image.Paletted) image.Image

type Segment

type Segment struct {
	Top    image.Point
	Bottom image.Point
}