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internal/graphicsdriver/metal: Use the smallest temporary texture

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Updates #1517
This commit is contained in:
Hajime Hoshi 2021-02-27 03:40:36 +09:00
parent 673627c4d4
commit 53352cf2b3
1 changed files with 29 additions and 5 deletions
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34
internal/graphicsdriver/metal/graphics.go
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@ -18,6 +18,7 @@ package metal
import (
"fmt"
"math"
"strings"
"unsafe"
@ -877,9 +878,31 @@ func (i *Image) Pixels() ([]byte, error) {
func (i *Image) ReplacePixels(args []*driver.ReplacePixelsArgs) {
g := i.graphics
// Calculate the smallest texture size to include all the values in args.
minX := math.MaxInt32
minY := math.MaxInt32
maxX := 0
maxY := 0
for _, a := range args {
if minX > a.X {
minX = a.X
}
if maxX < a.X+a.Width {
maxX = a.X + a.Width
}
if minY > a.Y {
minY = a.Y
}
if maxY < a.Y+a.Height {
maxY = a.Y + a.Height
}
}
w := maxX - minX
h := maxY - minY
// Use a temporary texture to send pixels asynchrounsly, whichever the memory is shared (e.g., iOS) or
// managed (e.g., macOS). (#1418)
w, h := i.texture.Width(), i.texture.Height()
// The texture cannot be reused until sending the pixels finishes, then create new ones for each call.
td := mtl.TextureDescriptor{
TextureType: mtl.TextureType2D,
PixelFormat: mtl.PixelFormatRGBA8UNorm,
@ -893,7 +916,7 @@ func (i *Image) ReplacePixels(args []*driver.ReplacePixelsArgs) {
for _, a := range args {
t.ReplaceRegion(mtl.Region{
Origin: mtl.Origin{X: a.X, Y: a.Y, Z: 0},
Origin: mtl.Origin{X: a.X - minX, Y: a.Y - minY, Z: 0},
Size: mtl.Size{Width: a.Width, Height: a.Height, Depth: 1},
}, 0, unsafe.Pointer(&a.Pixels[0]), 4*a.Width)
}
@ -903,9 +926,10 @@ func (i *Image) ReplacePixels(args []*driver.ReplacePixelsArgs) {
}
bce := g.cb.MakeBlitCommandEncoder()
for _, a := range args {
o := mtl.Origin{X: a.X, Y: a.Y, Z: 0}
s := mtl.Size{Width: a.Width, Height: a.Height, Depth: 1}
bce.CopyFromTexture(t, 0, 0, o, s, i.texture, 0, 0, o)
so := mtl.Origin{X: a.X - minX, Y: a.Y - minY, Z: 0}
ss := mtl.Size{Width: a.Width, Height: a.Height, Depth: 1}
do := mtl.Origin{X: a.X, Y: a.Y, Z: 0}
bce.CopyFromTexture(t, 0, 0, so, ss, i.texture, 0, 0, do)
}
bce.EndEncoding()
}