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Refactored the X backend draw code a bit

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This commit is contained in:
Sasha Koshka 2023-01-26 18:01:39 -05:00
parent 21c19363dd
commit 0f9a33fc57
1 changed files with 12 additions and 19 deletions
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31
backends/x/window.go
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@ -208,16 +208,7 @@ func (window *Window) reallocateCanvas () {
}
func (window *Window) redrawChildEntirely () {
data, stride := window.child.Buffer()
bounds := window.child.Bounds()
window.xCanvas.For (func (x, y int) (c xgraphics.BGRA) {
if !(image.Point { x, y }).In(bounds) { return }
rgba := data[x + y * stride]
c.R, c.G, c.B, c.A = rgba.R, rgba.G, rgba.B, rgba.A
return
})
window.pushRegion(window.xCanvas.Bounds())
window.pushRegion(window.paste(window.child))
}
func (window *Window) resizeChildToFit () {
@ -252,21 +243,23 @@ func (window *Window) resizeChildToFit () {
func (window *Window) childDrawCallback (region tomo.Canvas) {
if window.skipChildDrawCallback { return }
window.pushRegion(window.paste(region))
}
data, stride := region.Buffer()
bounds := region.Bounds()
func (window *Window) paste (canvas tomo.Canvas) (updatedRegion image.Rectangle) {
data, stride := canvas.Buffer()
bounds := canvas.Bounds().Intersect(window.xCanvas.Bounds())
for x := bounds.Min.X; x < bounds.Max.X; x ++ {
for y := bounds.Min.Y; y < bounds.Max.Y; y ++ {
rgba := data[x + y * stride]
window.xCanvas.SetBGRA (x, y, xgraphics.BGRA {
R: rgba.R,
G: rgba.G,
B: rgba.B,
A: rgba.A,
})
index := x * 4 + y * window.xCanvas.Stride
window.xCanvas.Pix[index + 0] = rgba.B
window.xCanvas.Pix[index + 1] = rgba.G
window.xCanvas.Pix[index + 2] = rgba.R
window.xCanvas.Pix[index + 3] = rgba.A
}}
window.pushRegion(region.Bounds())
return bounds
}
func (window *Window) childMinimumSizeChangeCallback (width, height int) {