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Allow controlling num of CPUs for images operations

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This commit is contained in:
Kovid Goyal
2023-01-03 10:49:41 +05:30
parent 2d3da1db6d
commit 7ebb281855
6 changed files with 84 additions and 58 deletions
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8
tools/utils/images/transforms.go
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@@ -25,9 +25,9 @@ func reverse_row(bytes_per_pixel int, pix []uint8) {
}
}
func FlipPixelsH(bytes_per_pixel, width, height int, pix []uint8) {
func (self *Context) FlipPixelsH(bytes_per_pixel, width, height int, pix []uint8) {
stride := bytes_per_pixel * width
parallel(0, height, func(ys <-chan int) {
self.Parallel(0, height, func(ys <-chan int) {
for y := range ys {
i := y * stride
reverse_row(bytes_per_pixel, pix[i:i+stride])
@@ -35,10 +35,10 @@ func FlipPixelsH(bytes_per_pixel, width, height int, pix []uint8) {
})
}
func FlipPixelsV(bytes_per_pixel, width, height int, pix []uint8) {
func (self *Context) FlipPixelsV(bytes_per_pixel, width, height int, pix []uint8) {
stride := bytes_per_pixel * width
num := height / 2
parallel(0, num, func(ys <-chan int) {
self.Parallel(0, num, func(ys <-chan int) {
for y := range ys {
upper := y
lower := height - 1 - y