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O2Hawk: sprite fix

This commit is contained in:
alyosha-tas 2020-02-16 16:42:31 -05:00
parent bfe7eee43f
commit 25d19cdb81
1 changed files with 92 additions and 50 deletions
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142
BizHawk.Emulation.Cores/Consoles/Magnavox/Odyssey2/PPU.cs
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@ -411,7 +411,7 @@ namespace BizHawk.Emulation.Cores.Consoles.O2Hawk
right_shift_even = (Sprites[i * 4 + 2].Bit(1) && (((Sprites[i * 4] + 8 * double_size - LY) % 2) == 0)) ? 1 : 0;
x_base = Sprites[i * 4 + 1];
if ((right_shift + right_shift_even) == 0)
if ((right_shift + right_shift_even) == 0)
{
if (((cycle - HBL_CNT) >= x_base) && ((cycle - HBL_CNT) < (x_base + 8 * (double_size / 2))))
{
@ -432,11 +432,11 @@ namespace BizHawk.Emulation.Cores.Consoles.O2Hawk
Pixel_Stat |= (byte)(1 << i);
}
}
}
else
}
else
{
// special shifted cases
// since we are drawing one pixel at a time, we need to be careful that the next background / grid/ char pixel
// since we are drawing two pixels at a time, we need to be careful that the next background / grid / char pixel
// doesn't overwrite the shifted pixel on the next pass
if (((cycle - HBL_CNT) >= x_base) && ((cycle - HBL_CNT) < (x_base + 1 + 8 * (double_size / 2))))
{
@ -460,7 +460,7 @@ namespace BizHawk.Emulation.Cores.Consoles.O2Hawk
if ((right_shift + right_shift_even) == 2)
{
Core._vidbuffer[LY * 372 + current_pixel_offset + 1 + right_shift + right_shift_even] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
Core._vidbuffer[LY * 372 + current_pixel_offset + 1] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
}
@ -539,68 +539,40 @@ namespace BizHawk.Emulation.Cores.Consoles.O2Hawk
{
if ((((cycle - HBL_CNT) - x_base) >> 1) == 8)
{
offset_x = 7;
int pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> offset_x) & 1;
if (pixel_pick == 1)
if ((((cycle - HBL_CNT) - x_base) % 2) == 0)
{
if (Core._settings.Show_Sprites)
offset_x = 7;
int pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> offset_x) & 1;
if (pixel_pick == 1)
{
Core._vidbuffer[LY * 372 + current_pixel_offset] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
if ((right_shift + right_shift_even) == 2)
if (Core._settings.Show_Sprites)
{
Core._vidbuffer[LY * 372 + current_pixel_offset + 1 + right_shift + right_shift_even] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
Core._vidbuffer[LY * 372 + current_pixel_offset] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
if ((right_shift + right_shift_even) == 2)
{
Core._vidbuffer[LY * 372 + current_pixel_offset + 1] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
}
}
Pixel_Stat |= (byte)(1 << i);
Pixel_Stat |= (byte)(1 << i);
}
}
}
else if ((((cycle - HBL_CNT) - x_base) >> 1) == 0)
{
if ((right_shift + right_shift_even) < 2)
if ((((cycle - HBL_CNT) - x_base) % 2) == 1)
{
offset_x = 0;
int pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> offset_x) & 1;
if (pixel_pick == 1)
{
if (Core._settings.Show_Sprites)
{
Core._vidbuffer[LY * 372 + current_pixel_offset + 1] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
Pixel_Stat |= (byte)(1 << i);
}
}
}
else
{
offset_x = (cycle - HBL_CNT - x_base) >> 1;
if ((right_shift + right_shift_even) < 2)
{
int pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> (offset_x - 1)) & 1;
if (pixel_pick == 1)
{
if (Core._settings.Show_Sprites)
{
Core._vidbuffer[LY * 372 + current_pixel_offset] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
Pixel_Stat |= (byte)(1 << i);
}
pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> offset_x) & 1;
if (pixel_pick == 1)
{
if (Core._settings.Show_Sprites)
{
Core._vidbuffer[LY * 372 + current_pixel_offset + 1] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
@ -609,7 +581,29 @@ namespace BizHawk.Emulation.Cores.Consoles.O2Hawk
}
else
{
offset_x -= 1;
if ((right_shift + right_shift_even) < 2)
{
offset_x = 0;
int pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> offset_x) & 1;
if (pixel_pick == 1)
{
if (Core._settings.Show_Sprites)
{
Core._vidbuffer[LY * 372 + current_pixel_offset + 1] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
Pixel_Stat |= (byte)(1 << i);
}
}
}
}
else
{
if ((((cycle - HBL_CNT) - x_base) % 2) == 1)
{
offset_x = (cycle - HBL_CNT - x_base) >> 1;
int pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> offset_x) & 1;
@ -624,10 +618,58 @@ namespace BizHawk.Emulation.Cores.Consoles.O2Hawk
Pixel_Stat |= (byte)(1 << i);
}
}
else
{
offset_x = (cycle - HBL_CNT - x_base) >> 1;
if ((right_shift + right_shift_even) < 2)
{
int pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> (offset_x - 1)) & 1;
if (pixel_pick == 1)
{
if (Core._settings.Show_Sprites)
{
Core._vidbuffer[LY * 372 + current_pixel_offset] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
Pixel_Stat |= (byte)(1 << i);
}
pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> offset_x) & 1;
if (pixel_pick == 1)
{
if (Core._settings.Show_Sprites)
{
Core._vidbuffer[LY * 372 + current_pixel_offset + 1] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
Pixel_Stat |= (byte)(1 << i);
}
}
else
{
offset_x -= 1;
int pixel_pick = (Sprite_Shapes[i * 8 + offset_y] >> offset_x) & 1;
if (pixel_pick == 1)
{
if (Core._settings.Show_Sprites)
{
Core._vidbuffer[LY * 372 + current_pixel_offset] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
Core._vidbuffer[LY * 372 + current_pixel_offset + 1] = (int)Color_Palette_SPR[(Sprites[i * 4 + 2] >> 3) & 0x7];
}
Pixel_Stat |= (byte)(1 << i);
}
}
}
}
}
}
}
}
}
}