33 lines
622 B
Go
33 lines
622 B
Go
package ui
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import "opslag.de/schobers/geom"
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type Buffer struct {
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im Image
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}
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func (b *Buffer) Update(ctx Context, size geom.PointF32) error {
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if b.im != nil {
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if b.im.Width() == size.X && b.im.Height() == size.Y {
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return nil
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}
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b.im.Destroy()
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b.im = nil
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}
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im, err := ctx.Renderer().CreateImageSize(size.X, size.Y)
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if err != nil {
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return err
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}
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b.im = im
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return nil
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}
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func (b *Buffer) Render(ctx Context, pos geom.PointF32, render func()) {
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renderer := ctx.Renderer()
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currTarget := renderer.Target()
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renderer.RenderTo(b.im)
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render()
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renderer.RenderTo(currTarget)
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renderer.DrawImage(b.im, pos)
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}
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