func vertices(parts ImageParts, width, height int, geo *GeoM) []float32 {
// TODO: This function should be in graphics package?
totalSize := graphics.QuadVertexSizeInBytes() / 4
l := parts.Len()
vs := js.Global.Get("Float32Array").New(l * totalSize)
g0 := geo.Element(0, 0)
g1 := geo.Element(0, 1)
g2 := geo.Element(1, 0)
g3 := geo.Element(1, 1)
g4 := geo.Element(0, 2)
g5 := geo.Element(1, 2)
w := 1.0
h := 1.0
for w < float64(width) {
w *= 2
}
for h < float64(height) {
h *= 2
}
n := 0
for i := 0; i < l; i++ {
dx0, dy0, dx1, dy1 := parts.Dst(i)
if dx0 == dx1 || dy0 == dy1 {
continue
}
sx0, sy0, sx1, sy1 := parts.Src(i)
if sx0 == sx1 || sy0 == sy1 {
continue
}
u0, v0, u1, v1 := float64(sx0)/w, float64(sy0)/h, float64(sx1)/w, float64(sy1)/h
vs.SetIndex(n, dx0)
vs.SetIndex(n+1, dy0)
vs.SetIndex(n+2, u0)
vs.SetIndex(n+3, v0)
vs.SetIndex(n+4, g0)
vs.SetIndex(n+5, g1)
vs.SetIndex(n+6, g2)
vs.SetIndex(n+7, g3)
vs.SetIndex(n+8, g4)
vs.SetIndex(n+9, g5)
vs.SetIndex(n+10, dx1)
vs.SetIndex(n+11, dy0)
vs.SetIndex(n+12, u1)
vs.SetIndex(n+13, v0)
vs.SetIndex(n+14, g0)
vs.SetIndex(n+15, g1)
vs.SetIndex(n+16, g2)
vs.SetIndex(n+17, g3)
vs.SetIndex(n+18, g4)
vs.SetIndex(n+19, g5)
vs.SetIndex(n+20, dx0)
vs.SetIndex(n+21, dy1)
vs.SetIndex(n+22, u0)
vs.SetIndex(n+23, v1)
vs.SetIndex(n+24, g0)
vs.SetIndex(n+25, g1)
vs.SetIndex(n+26, g2)
vs.SetIndex(n+27, g3)
vs.SetIndex(n+28, g4)
vs.SetIndex(n+29, g5)
vs.SetIndex(n+30, dx1)
vs.SetIndex(n+31, dy1)
vs.SetIndex(n+32, u1)
vs.SetIndex(n+33, v1)
vs.SetIndex(n+34, g0)
vs.SetIndex(n+35, g1)
vs.SetIndex(n+36, g2)
vs.SetIndex(n+37, g3)
vs.SetIndex(n+38, g4)
vs.SetIndex(n+39, g5)
n += totalSize
}
return vs.Interface().([]float32)
}
func vertices(parts ImageParts, width, height int, geo *GeoM) []float32 {
// TODO: This function should be in graphics package?
totalSize := graphics.QuadVertexSizeInBytes() / 4
l := parts.Len()
vs := make([]float32, l*totalSize)
g0 := float32(geo.Element(0, 0))
g1 := float32(geo.Element(0, 1))
g2 := float32(geo.Element(1, 0))
g3 := float32(geo.Element(1, 1))
g4 := float32(geo.Element(0, 2))
g5 := float32(geo.Element(1, 2))
w := float32(1)
h := float32(1)
for w < float32(width) {
w *= 2
}
for h < float32(height) {
h *= 2
}
n := 0
for i := 0; i < l; i++ {
dx0, dy0, dx1, dy1 := parts.Dst(i)
if dx0 == dx1 || dy0 == dy1 {
continue
}
x0, y0, x1, y1 := float32(dx0), float32(dy0), float32(dx1), float32(dy1)
sx0, sy0, sx1, sy1 := parts.Src(i)
if sx0 == sx1 || sy0 == sy1 {
continue
}
u0, v0, u1, v1 := float32(sx0)/w, float32(sy0)/h, float32(sx1)/w, float32(sy1)/h
vs[n] = x0
vs[n+1] = y0
vs[n+2] = u0
vs[n+3] = v0
vs[n+4] = g0
vs[n+5] = g1
vs[n+6] = g2
vs[n+7] = g3
vs[n+8] = g4
vs[n+9] = g5
vs[n+10] = x1
vs[n+11] = y0
vs[n+12] = u1
vs[n+13] = v0
vs[n+14] = g0
vs[n+15] = g1
vs[n+16] = g2
vs[n+17] = g3
vs[n+18] = g4
vs[n+19] = g5
vs[n+20] = x0
vs[n+21] = y1
vs[n+22] = u0
vs[n+23] = v1
vs[n+24] = g0
vs[n+25] = g1
vs[n+26] = g2
vs[n+27] = g3
vs[n+28] = g4
vs[n+29] = g5
vs[n+30] = x1
vs[n+31] = y1
vs[n+32] = u1
vs[n+33] = v1
vs[n+34] = g0
vs[n+35] = g1
vs[n+36] = g2
vs[n+37] = g3
vs[n+38] = g4
vs[n+39] = g5
n += totalSize
}
return vs
}