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Takes a stab at attached sprites.

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This commit is contained in:
Thomas Harte 2021-11-19 14:19:47 -05:00
parent bcc959d938
commit a94b4f62fd
1 changed files with 26 additions and 14 deletions
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40
Machines/Amiga/Chipset.cpp
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@ -282,20 +282,32 @@ template <int cycle> void Chipset::output() {
if(!data) continue;
const int base = (c << 2) + 16;
// TODO: can do a better job of selection here —
// treat each 4-bit quantity as a single colour
// selection, much like dual playfield mode.
if(data >> 6) {
pixels_[0] = pixels_[1] = palette_[base + (data >> 6)];
}
if((data >> 4) & 3) {
pixels_[0] = pixels_[1] = palette_[base + ((data >> 4)&3)];
}
if((data >> 2) & 3) {
pixels_[2] = pixels_[3] = palette_[base + ((data >> 2)&3)];
}
if(data & 3) {
pixels_[2] = pixels_[3] = palette_[base + (data & 3)];
if(sprites_[(c << 1) + 1].attached) {
// Left pixel.
if(data >> 4) {
pixels_[0] = pixels_[1] = palette_[16 + (data >> 4)];
}
// Right pixel.
if(data & 15) {
pixels_[2] = pixels_[3] = palette_[16 + (data & 15)];
}
} else {
// Left pixel.
if(data >> 6) {
pixels_[0] = pixels_[1] = palette_[base + (data >> 6)];
}
if((data >> 4) & 3) {
pixels_[0] = pixels_[1] = palette_[base + ((data >> 4)&3)];
}
// Right pixel.
if((data >> 2) & 3) {
pixels_[2] = pixels_[3] = palette_[base + ((data >> 2)&3)];
}
if(data & 3) {
pixels_[2] = pixels_[3] = palette_[base + (data & 3)];
}
}
}