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fix screen edge partial sprite tile drawing in bigend

This commit is contained in:
lif 2024-01-04 22:52:18 -08:00
parent 6928b667ae
commit 62ce62777d
1 changed files with 3 additions and 2 deletions
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5
video.cc
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@ -245,6 +245,7 @@ static inline void rend_part_tile_Nbpp(u32 bg_comb, u32 px_comb,
u16 pxflg = px_comb | tilepal;
const u16 *subpal = &paltbl[tilepal];
// Read packed pixel data, skip start pixels
// TODO: account for big-endian byte reversal here
u32 tilepix = eswap32(*(u32*)tile_ptr);
if (hflip) tilepix <<= (start * 4);
else tilepix >>= (start * 4);
@ -1035,7 +1036,7 @@ static inline void render_obj_part_tile_Nbpp(
for (u32 i = start; i < end; i++, dest_ptr++) {
// Honor hflip by selecting bytes in the correct order
u32 sel = hflip ? (7-i) : i;
u8 pval = tile_ptr[sel];
u8 pval = tile_ptr[swizzle_b(sel)];
// Alhpa mode stacks previous value
if (pval) {
if (rdtype == FULLCOLOR)
@ -1059,7 +1060,7 @@ static inline void render_obj_part_tile_Nbpp(
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 = (tile_ptr[swizzle_b(selb)] >> (seln * 4)) & 0xF;
const u16 *subpal = &pal[palette];
if (pval) {
if (rdtype == FULLCOLOR)