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Simplified 40-column to pixel conversion.

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This commit is contained in:
Thomas Harte 2016-04-05 20:44:05 -04:00
parent 6dbd20ffde
commit e35456612a
1 changed files with 5 additions and 18 deletions
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17
Machines/Electron/Electron.cpp
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@ -580,31 +580,18 @@ inline void Machine::output_pixels(unsigned int number_of_cycles)
case 6:
case 4:
{
if(_current_pixel_column&1)
{
_current_output_target[0] = pack(_palette[(_last_pixel_byte&0x08) >> 0], _palette[(_last_pixel_byte&0x04) << 1]);
_current_output_target[1] = pack(_palette[(_last_pixel_byte&0x02) << 2], _palette[(_last_pixel_byte&0x01) << 3]);
}
else
{
_current_output_target[0] = pack(_palette[(_last_pixel_byte&0x80) >> 4], _palette[(_last_pixel_byte&0x40) >> 3]);
_current_output_target[1] = pack(_palette[(_last_pixel_byte&0x20) >> 2], _palette[(_last_pixel_byte&0x10) >> 1]);
}
_last_pixel_byte <<= 4;
_current_output_target += 2;
}
break;
case 5:
{
if(_current_pixel_column&1)
{
_current_output_target[0] = pack(_palette[((_last_pixel_byte&0x20) >> 2) | ((_last_pixel_byte&0x02) >> 0)], _palette[((_last_pixel_byte&0x10) >> 1) | ((_last_pixel_byte&0x01) << 1)]);
}
else
{
_current_output_target[0] = pack(_palette[((_last_pixel_byte&0x80) >> 4) | ((_last_pixel_byte&0x08) >> 2)], _palette[((_last_pixel_byte&0x40) >> 3) | ((_last_pixel_byte&0x04) >> 1)]);
}
_last_pixel_byte <<= 2;
_current_output_target += 1;
}
break;