mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-11-14 05:00:27 +00:00
53cafa9f3d
This commit adds support for go/cgo tgs conversion when building with the -tags `cgo` The default binaries are still "pure" go and uses the old way of converting. * Move lottie_convert.py conversion code to its own file * Add optional libtgsconverter * Update vendor * Apply suggestions from code review * Update bridge/helper/libtgsconverter.go Co-authored-by: Wim <wim@42.be>
120 lines
2.0 KiB
Go
120 lines
2.0 KiB
Go
package libtgsconverter
|
|
|
|
import "image/color"
|
|
|
|
type colorAxis uint8
|
|
|
|
// Color axis constants
|
|
const (
|
|
red colorAxis = iota
|
|
green
|
|
blue
|
|
)
|
|
|
|
type colorPriority struct {
|
|
p uint32
|
|
color.RGBA
|
|
}
|
|
|
|
func (c colorPriority) axis(span colorAxis) uint8 {
|
|
switch span {
|
|
case red:
|
|
return c.R
|
|
case green:
|
|
return c.G
|
|
default:
|
|
return c.B
|
|
}
|
|
}
|
|
|
|
type colorBucket []colorPriority
|
|
|
|
func (cb colorBucket) partition() (colorBucket, colorBucket) {
|
|
mean, span := cb.span()
|
|
left, right := 0, len(cb)-1
|
|
for left < right {
|
|
cb[left], cb[right] = cb[right], cb[left]
|
|
for cb[left].axis(span) < mean && left < right {
|
|
left++
|
|
}
|
|
for cb[right].axis(span) >= mean && left < right {
|
|
right--
|
|
}
|
|
}
|
|
if left == 0 {
|
|
return cb[:1], cb[1:]
|
|
}
|
|
if left == len(cb)-1 {
|
|
return cb[:len(cb)-1], cb[len(cb)-1:]
|
|
}
|
|
return cb[:left], cb[left:]
|
|
}
|
|
|
|
func (cb colorBucket) mean() color.RGBA {
|
|
var r, g, b uint64
|
|
var p uint64
|
|
for _, c := range cb {
|
|
p += uint64(c.p)
|
|
r += uint64(c.R) * uint64(c.p)
|
|
g += uint64(c.G) * uint64(c.p)
|
|
b += uint64(c.B) * uint64(c.p)
|
|
}
|
|
return color.RGBA{uint8(r / p), uint8(g / p), uint8(b / p), 255}
|
|
}
|
|
|
|
type constraint struct {
|
|
min uint8
|
|
max uint8
|
|
vals [256]uint64
|
|
}
|
|
|
|
func (c *constraint) update(index uint8, p uint32) {
|
|
if index < c.min {
|
|
c.min = index
|
|
}
|
|
if index > c.max {
|
|
c.max = index
|
|
}
|
|
c.vals[index] += uint64(p)
|
|
}
|
|
|
|
func (c *constraint) span() uint8 {
|
|
return c.max - c.min
|
|
}
|
|
|
|
func (cb colorBucket) span() (uint8, colorAxis) {
|
|
var R, G, B constraint
|
|
R.min = 255
|
|
G.min = 255
|
|
B.min = 255
|
|
var p uint64
|
|
for _, c := range cb {
|
|
R.update(c.R, c.p)
|
|
G.update(c.G, c.p)
|
|
B.update(c.B, c.p)
|
|
p += uint64(c.p)
|
|
}
|
|
var toCount *constraint
|
|
var span colorAxis
|
|
if R.span() > G.span() && R.span() > B.span() {
|
|
span = red
|
|
toCount = &R
|
|
} else if G.span() > B.span() {
|
|
span = green
|
|
toCount = &G
|
|
} else {
|
|
span = blue
|
|
toCount = &B
|
|
}
|
|
var counted uint64
|
|
var i int
|
|
var c uint64
|
|
for i, c = range toCount.vals {
|
|
if counted > p/2 || counted+c == p {
|
|
break
|
|
}
|
|
counted += c
|
|
}
|
|
return uint8(i), span
|
|
}
|