diff options
Diffstat (limited to 'src/tile16.cpp')
| -rw-r--r-- | src/tile16.cpp | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/tile16.cpp b/src/tile16.cpp index 747209c..d923eec 100644 --- a/src/tile16.cpp +++ b/src/tile16.cpp @@ -52,6 +52,8 @@ extern uint32 HeadMask [4]; extern uint32 TailMask [5]; +#ifdef ARM_ASM + #define f(from, to_lo, to_hi, pix) \ " movs " #from ", " #from ", lsl #(17) \n" \ " addcs " #to_hi ", " #to_hi ", #(1 << ( 0 + 1 + " #pix ")) \n" \ @@ -214,8 +216,127 @@ void SelectConvertTile() { ConvertTile = &ConvertTile2bpp; break; } +} +#else +uint8 ConvertTile (uint8 *pCache, uint32 TileAddr) +{ + register uint8 *tp = &Memory.VRAM[TileAddr]; + uint32 *p = (uint32 *) pCache; + uint32 non_zero = 0; + uint8 line; + + switch (BG.BitShift) + { + case 8: + for (line = 8; line != 0; line--, tp += 2) + { + uint32 p1 = 0; + uint32 p2 = 0; + register uint8 pix; + + if ((pix = *(tp + 0))) + { + p1 |= odd_high[0][pix >> 4]; + p2 |= odd_low[0][pix & 0xf]; + } + if ((pix = *(tp + 1))) + { + p1 |= even_high[0][pix >> 4]; + p2 |= even_low[0][pix & 0xf]; + } + if ((pix = *(tp + 16))) + { + p1 |= odd_high[1][pix >> 4]; + p2 |= odd_low[1][pix & 0xf]; + } + if ((pix = *(tp + 17))) + { + p1 |= even_high[1][pix >> 4]; + p2 |= even_low[1][pix & 0xf]; + } + if ((pix = *(tp + 32))) + { + p1 |= odd_high[2][pix >> 4]; + p2 |= odd_low[2][pix & 0xf]; + } + if ((pix = *(tp + 33))) + { + p1 |= even_high[2][pix >> 4]; + p2 |= even_low[2][pix & 0xf]; + } + if ((pix = *(tp + 48))) + { + p1 |= odd_high[3][pix >> 4]; + p2 |= odd_low[3][pix & 0xf]; + } + if ((pix = *(tp + 49))) + { + p1 |= even_high[3][pix >> 4]; + p2 |= even_low[3][pix & 0xf]; + } + *p++ = p1; + *p++ = p2; + non_zero |= p1 | p2; + } + break; + case 4: + for (line = 8; line != 0; line--, tp += 2) + { + uint32 p1 = 0; + uint32 p2 = 0; + register uint8 pix; + if ((pix = *(tp + 0))) + { + p1 |= odd_high[0][pix >> 4]; + p2 |= odd_low[0][pix & 0xf]; + } + if ((pix = *(tp + 1))) + { + p1 |= even_high[0][pix >> 4]; + p2 |= even_low[0][pix & 0xf]; + } + if ((pix = *(tp + 16))) + { + p1 |= odd_high[1][pix >> 4]; + p2 |= odd_low[1][pix & 0xf]; + } + if ((pix = *(tp + 17))) + { + p1 |= even_high[1][pix >> 4]; + p2 |= even_low[1][pix & 0xf]; + } + *p++ = p1; + *p++ = p2; + non_zero |= p1 | p2; + } + break; + + case 2: + for (line = 8; line != 0; line--, tp += 2) + { + uint32 p1 = 0; + uint32 p2 = 0; + register uint8 pix; + if ((pix = *(tp + 0))) + { + p1 |= odd_high[0][pix >> 4]; + p2 |= odd_low[0][pix & 0xf]; + } + if ((pix = *(tp + 1))) + { + p1 |= even_high[0][pix >> 4]; + p2 |= even_low[0][pix & 0xf]; + } + *p++ = p1; + *p++ = p2; + non_zero |= p1 | p2; + } + break; + } + return (non_zero ? TRUE : BLANK_TILE); } +#endif void SelectPalette() { // GFX.ScreenColors = &GFX.ScreenColorsPre[(Tile & GFX.PaletteMask) >> GFX.PaletteShift]; |