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Fixed double lo res. Bejeweled works

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This commit is contained in:
Ivan Izaguirre 2020-04-05 17:02:11 +02:00
parent 1406012c2a
commit f6c99d93a8
1 changed files with 7 additions and 1 deletions
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8
screenLoRes.go
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@ -64,12 +64,18 @@ func snapshotLoResModeMono(a *Apple2, isDoubleResMode bool, isSecondPage bool, i
// The groups of 4 mono pixels need to be alligned with an offset to get plain surfaces
offset := (c * pixelWidth) % 4
if isDoubleResMode && ((c % 2) == 0) {
// See "Understanding the Apple II", page 8-44
// Even blocks color are rotated left on bit
offset = offset + 3
}
// Insert the pixelWidth pixels required
for i := 0; i < pixelWidth; i++ {
v := patterns[grPixel][i+offset]
// Repeat the same color for 4 lines
for r := 0; r < loResPixelHeight; r++ {
img.Set(c*loResPixelWidth+i, l*4+r, v)
img.Set(c*pixelWidth+i, l*4+r, v)
}
}