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graphics: Optimization for browsers (#285)

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This commit is contained in:
Hajime Hoshi 2016-10-26 23:35:29 +09:00
parent 6cdcdd6d51
commit d5ddd38ca9
3 changed files with 25 additions and 22 deletions
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9
imageparts.go
View File

@ -16,7 +16,6 @@ package ebiten
import (
"image"
"math"
)
// An ImagePart is deprecated (as of 1.1.0-alpha): Use ImageParts instead.
@ -65,11 +64,3 @@ func (w *wholeImage) Dst(i int) (x0, y0, x1, y1 int) {
func (w *wholeImage) Src(i int) (x0, y0, x1, y1 int) {
return 0, 0, w.width, w.height
}
func u(x, width2p int) int16 {
return int16(math.MaxInt16 * x / width2p)
}
func v(y, height2p int) int16 {
return int16(math.MaxInt16 * y / height2p)
}

10
vertices.go
View File

@ -37,6 +37,14 @@ func floatsToInt16s(xs ...float64) []int16 {
return r
}
func u(x, width2p int) int16 {
return int16(math.MaxInt16 * x / width2p)
}
func v(y, height2p int) int16 {
return int16(math.MaxInt16 * y / height2p)
}
func vertices(parts ImageParts, width, height int, geo *GeoM) []int16 {
// TODO: This function should be in graphics package?
totalSize := graphics.QuadVertexSizeInBytes() / 2
@ -45,13 +53,13 @@ func vertices(parts ImageParts, width, height int, geo *GeoM) []int16 {
vs := make([]int16, l*totalSize)
width2p := graphics.NextPowerOf2Int(width)
height2p := graphics.NextPowerOf2Int(height)
n := 0
geo16 := floatsToInt16s(geo.Element(0, 0),
geo.Element(0, 1),
geo.Element(1, 0),
geo.Element(1, 1),
geo.Element(0, 2),
geo.Element(1, 2))
n := 0
for i := 0; i < l; i++ {
dx0, dy0, dx1, dy1 := parts.Dst(i)
if dx0 == dx1 || dy0 == dy1 {

28
vertices_js.go
View File

@ -17,6 +17,8 @@
package ebiten
import (
"math"
"github.com/gopherjs/gopherjs/js"
"github.com/hajimehoshi/ebiten/internal/graphics"
)
@ -29,8 +31,8 @@ func vertices(parts ImageParts, width, height int, geo *GeoM) []int16 {
a := js.Global.Get("ArrayBuffer").New(l * totalSize * 2)
af32 := js.Global.Get("Float32Array").New(a)
a16 := js.Global.Get("Int16Array").New(a)
width2p := graphics.NextPowerOf2Int(width)
height2p := graphics.NextPowerOf2Int(height)
w2p := graphics.NextPowerOf2Int(width)
h2p := graphics.NextPowerOf2Int(height)
gs := []float64{geo.Element(0, 0),
geo.Element(0, 1),
geo.Element(1, 0),
@ -43,36 +45,38 @@ func vertices(parts ImageParts, width, height int, geo *GeoM) []int16 {
if dx0 == dx1 || dy0 == dy1 {
continue
}
x0, y0, x1, y1 := int16(dx0), int16(dy0), int16(dx1), int16(dy1)
sx0, sy0, sx1, sy1 := parts.Src(i)
if sx0 == sx1 || sy0 == sy1 {
continue
}
u0, v0, u1, v1 := u(sx0, width2p), v(sy0, height2p), u(sx1, width2p), v(sy1, height2p)
u0 := math.MaxInt16 * sx0 / w2p
v0 := math.MaxInt16 * sy0 / h2p
u1 := math.MaxInt16 * sx1 / w2p
v1 := math.MaxInt16 * sy1 / h2p
offset := n * totalSize
a16.SetIndex(offset, x0)
a16.SetIndex(offset+1, y0)
a16.SetIndex(offset, dx0)
a16.SetIndex(offset+1, dy0)
a16.SetIndex(offset+2, u0)
a16.SetIndex(offset+3, v0)
for j, g := range gs {
af32.SetIndex((offset+4)/2+j, g)
}
a16.SetIndex(offset+oneSize, x1)
a16.SetIndex(offset+oneSize+1, y0)
a16.SetIndex(offset+oneSize, dx1)
a16.SetIndex(offset+oneSize+1, dy0)
a16.SetIndex(offset+oneSize+2, u1)
a16.SetIndex(offset+oneSize+3, v0)
for j, g := range gs {
af32.SetIndex((offset+oneSize+4)/2+j, g)
}
a16.SetIndex(offset+2*oneSize, x0)
a16.SetIndex(offset+2*oneSize+1, y1)
a16.SetIndex(offset+2*oneSize, dx0)
a16.SetIndex(offset+2*oneSize+1, dy1)
a16.SetIndex(offset+2*oneSize+2, u0)
a16.SetIndex(offset+2*oneSize+3, v1)
for j, g := range gs {
af32.SetIndex((offset+2*oneSize+4)/2+j, g)
}
a16.SetIndex(offset+3*oneSize, x1)
a16.SetIndex(offset+3*oneSize+1, y1)
a16.SetIndex(offset+3*oneSize, dx1)
a16.SetIndex(offset+3*oneSize+1, dy1)
a16.SetIndex(offset+3*oneSize+2, u1)
a16.SetIndex(offset+3*oneSize+3, v1)
for j, g := range gs {