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More perf improvements

This commit is contained in:
David Guillen Fandos 2023-08-05 16:02:57 +02:00
parent d6f5d72a97
commit 88fdbebd53
1 changed files with 10 additions and 4 deletions
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14
video.cc
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@ -182,14 +182,17 @@ static inline void render_part_tile_Nbpp(u32 bg_comb, u32 px_comb,
// In 4bpp mode, the tile[15..12] bits contain the sub-palette number.
u16 tilepal = (tile >> 12) << 4;
u16 pxflg = px_comb | tilepal;
const u16 *subpal = &paltbl[tilepal];
// Read packed pixel data, skip start pixels
u32 tilepix = eswap32(*(u32*)tile_ptr);
if (hflip) tilepix <<= (start * 4);
else tilepix >>= (start * 4);
// Only 32 bits (8 pixels * 4 bits)
for (u32 i = start; i < end; i++, dest_ptr++) {
u32 selb = hflip ? (3-i/2) : i/2;
u32 seln = hflip ? ((i & 1) ^ 1) : (i & 1);
u8 pval = (tile_ptr[selb] >> (seln * 4)) & 0xF;
u8 pval = hflip ? tilepix >> 28 : tilepix & 0xF;
if (pval) {
if (rdtype == FULLCOLOR)
*dest_ptr = paltbl[tilepal | pval];
*dest_ptr = subpal[pval];
else if (rdtype == INDXCOLOR)
*dest_ptr = pxflg | pval;
else if (rdtype == STCKCOLOR)
@ -201,6 +204,9 @@ static inline void render_part_tile_Nbpp(u32 bg_comb, u32 px_comb,
else
*dest_ptr = 0 | bg_comb;
}
// Advance to next packed data
if (hflip) tilepix <<= 4;
else tilepix >>= 4;
}
}
}