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Apple IIe char gen ROM management

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Ivan Izaguirre 2019-10-12 23:55:53 +02:00 committed by Iván Izaguirre
parent eeebf1bb0f
commit 3f7e3b3013
1 changed files with 21 additions and 5 deletions
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26
screenText.go
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@ -57,12 +57,28 @@ func snapshotTextMode(a *Apple2, page int, mixMode bool, light color.Color) *ima
rowInChar := y % charHeight
colInChar := x % charWidth
char := getTextChar(a, col, line, page)
topBits := char >> 6
isInverse := topBits == 0
isFlash := topBits == 1
var pixel bool
if a.isApple2e {
isAltText := a.io.isSoftSwitchActive(ioFlagAltChar)
vid6 := (char & 0x40) != 0
vid7 := (char & 0x80) != 0
pixel := a.cg.getPixel(char, rowInChar, colInChar)
pixel = pixel != (isInverse || (isFlash && isFlashedFrame))
char := char & 0x3f
if vid6 && (vid7 || isAltText) {
char += 0x40
}
if vid7 || (vid6 && isFlashedFrame && !isAltText) {
char += 0x80
}
pixel = !a.cg.getPixel(char, rowInChar, colInChar)
} else {
pixel = a.cg.getPixel(char, rowInChar, colInChar)
topBits := char >> 6
isInverse := topBits == 0
isFlash := topBits == 1
pixel = pixel != (isInverse || (isFlash && isFlashedFrame))
}
var colour color.Color
if pixel {
colour = light