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Rendering running independently on the main thread

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tudnai 2020-05-01 19:10:44 -07:00
parent ef6ae3ccc5
commit db8c657d0e
1 changed files with 52 additions and 48 deletions
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100
A2Mac/ViewController.swift
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@ -405,6 +405,7 @@ class ViewController: NSViewController {
// return
frameCnt += 1
if ( frameCnt == fps / 2 ) {
// flashingSpace = blockChar
ViewController.charConvTbl = ViewController.charConvTblFlashOn
@ -415,65 +416,68 @@ class ViewController: NSViewController {
frameCnt = 0
}
var txt : String = ""
var fromLines = 0
var toLines = textLines
// Rendering is happening in the main thread, which has two implications:
// 1. We can update UI elements
// 2. it is independent of the simulation, de that is running in the background thread while we are busy with rendering...
DispatchQueue.main.async {
var txt : String = ""
var fromLines = 0
var toLines = self.textLines
if videoMode.text == 0 {
if videoMode.mixed == 1 {
fromLines = toLines - 4
}
else {
toLines = 0
}
}
txtArr = txtClear
// render an empty space to eiminate displaying text portion of the screen covered by graphics
for y in 0 ..< fromLines {
if videoMode.col80 == 0 {
txtArr[ y * (textCols + lineEndChars) + textCols ] = "\n"
}
else {
txtArr[ y * (textCols * 2 + lineEndChars) + textCols * 2] = "\n"
}
}
// render the rest of the text screen
for y in fromLines ..< toLines {
for x in 0 ..< textCols {
let byte = textBufferPointer[ textLineOfs[y] + x ]
let idx = Int(byte);
let chr = ViewController.charConvTbl[idx]
if videoMode.col80 == 0 {
txtArr[ y * (textCols + lineEndChars) + x ] = chr
if videoMode.text == 0 {
if videoMode.mixed == 1 {
fromLines = toLines - 4
}
else {
txtArr[ y * (textCols * 2 + lineEndChars) + x * 2 + 1] = chr
toLines = 0
}
}
let byte = textAuxBufferPointer[ textLineOfs[y] + x ]
self.txtArr = self.txtClear
// render an empty space to eiminate displaying text portion of the screen covered by graphics
for y in 0 ..< fromLines {
if videoMode.col80 == 0 {
self.txtArr[ y * (self.textCols + self.lineEndChars) + self.textCols ] = "\n"
}
else {
self.txtArr[ y * (self.textCols * 2 + self.lineEndChars) + self.textCols * 2] = "\n"
}
}
// render the rest of the text screen
for y in fromLines ..< toLines {
for x in 0 ..< self.textCols {
let byte = self.textBufferPointer[ self.textLineOfs[y] + x ]
let idx = Int(byte);
let chr = ViewController.charConvTbl[idx]
txtArr[ y * (textCols * 2 + lineEndChars) + x * 2] = chr
if videoMode.col80 == 0 {
self.txtArr[ y * (self.textCols + self.lineEndChars) + x ] = chr
}
else {
self.txtArr[ y * (self.textCols * 2 + self.lineEndChars) + x * 2 + 1] = chr
let byte = self.textAuxBufferPointer[ self.textLineOfs[y] + x ]
let idx = Int(byte);
let chr = ViewController.charConvTbl[idx]
self.txtArr[ y * (self.textCols * 2 + self.lineEndChars) + x * 2] = chr
}
}
if videoMode.col80 == 0 {
self.txtArr[ y * (self.textCols + self.lineEndChars) + self.textCols ] = "\n"
}
else {
self.txtArr[ y * (self.textCols * 2 + self.lineEndChars) + self.textCols * 2] = "\n"
}
}
if videoMode.col80 == 0 {
txtArr[ y * (textCols + lineEndChars) + textCols ] = "\n"
}
else {
txtArr[ y * (textCols * 2 + lineEndChars) + textCols * 2] = "\n"
}
}
txt = String(txtArr)
txt = String(self.txtArr)
DispatchQueue.main.async {
if videoMode.col80 != self.currentVideoMode.col80 {
self.currentVideoMode.col80 = videoMode.col80