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btex: better multithreaded rendering

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minjaesong
2024-06-02 22:02:22 +09:00
parent 408e976dd8
commit 9948566ce4
1 changed files with 6 additions and 4 deletions
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10
src/net/torvald/btex/BTeXDocument.kt
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@@ -12,6 +12,7 @@ import net.torvald.terrarum.btex.BTeXDocument.Companion.HREF_UNDERLINE_SHADOW
import net.torvald.terrarum.btex.BTeXDocument.Companion.UNDERLINE_Y
import net.torvald.terrarum.ceilToInt
import net.torvald.terrarum.concurrent.ThreadExecutor
import net.torvald.terrarum.concurrent.sliceEvenly
import net.torvald.terrarum.imagefont.TinyAlphNum
import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.archivers.ClusteredFormatDOM
import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.archivers.Clustfile
@@ -227,7 +228,9 @@ class BTeXDocument : Disposable {
}
}
else {
val jobs = pages.indices.map { pageNum -> Callable {
// my experiment tells 4, 8, 16, 32 threads all perform the same
val THREAD_COUNT = Runtime.getRuntime().availableProcessors().div(2).coerceIn(1..4)
val jobs = pages.indices.sliceEvenly(THREAD_COUNT).map { Callable { it.forEach { pageNum ->
val page = pages[pageNum]
val pixmap = Pixmap(pageDimensionWidth, pageDimensionHeight, Pixmap.Format.RGBA8888).also {
it.blending = Pixmap.Blending.SourceOver
@@ -238,10 +241,9 @@ class BTeXDocument : Disposable {
pagePixmaps[pageNum] = pixmap
progressIndicator.getAndAdd(1)
Unit
} }
} } }
// my experiment tells 4, 8, 16, 32 threads all perform the same
ThreadExecutor(Runtime.getRuntime().availableProcessors().div(2).coerceIn(1..4)).also {
ThreadExecutor(THREAD_COUNT).also {
it.renew()
it.submitAll(jobs)
it.join()