78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
package softwarebackend
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import (
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"image"
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"image/draw"
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"github.com/tfriedel6/canvas/backend/backendbase"
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)
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type SoftwareBackend struct {
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Image *image.RGBA
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clip *image.Alpha
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mask *image.Alpha
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w, h int
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}
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func New(w, h int) *SoftwareBackend {
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b := &SoftwareBackend{}
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b.SetSize(w, h)
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return b
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}
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func (b *SoftwareBackend) SetSize(w, h int) {
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b.w, b.h = w, h
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b.Image = image.NewRGBA(image.Rect(0, 0, w, h))
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b.clip = image.NewAlpha(image.Rect(0, 0, w, h))
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b.mask = image.NewAlpha(image.Rect(0, 0, w, h))
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b.ClearClip()
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}
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func (b *SoftwareBackend) Size() (int, int) {
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return b.w, b.h
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}
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func (b *SoftwareBackend) GetImageData(x, y, w, h int) *image.RGBA {
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return b.Image.SubImage(image.Rect(x, y, w, h)).(*image.RGBA)
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}
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func (b *SoftwareBackend) PutImageData(img *image.RGBA, x, y int) {
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draw.Draw(b.Image, image.Rect(x, y, img.Rect.Dx(), img.Rect.Dy()), img, image.ZP, draw.Src)
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}
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func (b *SoftwareBackend) CanUseAsImage(b2 backendbase.Backend) bool {
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return false
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}
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func (b *SoftwareBackend) AsImage() backendbase.Image {
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return nil
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}
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type LinearGradient struct {
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data backendbase.Gradient
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}
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type RadialGradient struct {
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data backendbase.Gradient
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}
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func (b *SoftwareBackend) LoadLinearGradient(data backendbase.Gradient) backendbase.LinearGradient {
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return &LinearGradient{data: data}
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}
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func (b *SoftwareBackend) LoadRadialGradient(data backendbase.Gradient) backendbase.RadialGradient {
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return &RadialGradient{data: data}
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}
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func (g *LinearGradient) Delete() {
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}
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func (g *LinearGradient) Replace(data backendbase.Gradient) {
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g.data = data
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}
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func (g *RadialGradient) Delete() {
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}
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func (g *RadialGradient) Replace(data backendbase.Gradient) {
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g.data = data
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}
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