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reverted changes made to column-based vertical scrolling (verified on real hardware)

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ekeeke31 2010-06-11 05:57:35 +00:00
parent 12606da28e
commit f8c7045b72
1 changed files with 8 additions and 29 deletions
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37
source/render.c
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@ -1081,13 +1081,8 @@ static void render_bg_vs(int line, int width)
if(shift)
{
dst = (uint32 *)&buf[0x10 + shift];
#ifdef LSB_FIRST
v_line = (reg[12] & 1) ? ((line + ((vs[0] >> 16) & 0x3FF)) & pf_row_mask) : line;
#else
v_line = (reg[12] & 1) ? ((line + (vs[0] & 0x3FF)) & pf_row_mask) : line;
#endif
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
v_line = (v_line & 7) << 3;
nt = (uint32 *)&vram[ntbb + (((line >> 3) << pf_shift) & 0x1FC0)];
v_line = (line & 7) << 3;
atbuf = nt[(index-1) & pf_col_mask];
DRAW_COLUMN(atbuf, v_line)
@ -1148,14 +1143,8 @@ static void render_bg_vs(int line, int width)
if(shift)
{
dst = (uint32 *)&buf[0x10 + shift + (start<<4)];
#ifdef LSB_FIRST
v_line = (reg[12] & 1) ? ((line + (vs[start] & 0x3FF)) & pf_row_mask) : line;
#else
v_line = (reg[12] & 1) ? ((line + ((vs[start] >> 16) & 0x3FF)) & pf_row_mask) : line;
#endif
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
v_line = (v_line & 7) << 3;
nt = (uint32 *)&vram[ntab + (((line >> 3) << pf_shift) & 0x1FC0)];
v_line = (line & 7) << 3;
/* Window bug */
if (start) atbuf = nt[index & pf_col_mask];
@ -1352,13 +1341,8 @@ static void render_bg_im2_vs(int line, int width, int odd)
if(shift)
{
dst = (uint32 *)&buf[0x10 + shift];
#ifdef LSB_FIRST
v_line = (line + (reg[12] & 1) ? ((vs[0] >> 17) & 0x3FF) : 0) & pf_row_mask;
#else
v_line = (line + (reg[12] & 1) ? ((vs[0] >> 1) & 0x3FF) : 0) & pf_row_mask;
#endif
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
v_line = (((v_line & 7) << 1) | odd) << 3;
nt = (uint32 *)&vram[ntbb + (((line >> 3) << pf_shift) & 0x1FC0)];
v_line = (((line & 7) << 1) | odd) << 3;
atbuf = nt[(index-1) & pf_col_mask];
DRAW_COLUMN_IM2(atbuf, v_line)
@ -1417,13 +1401,8 @@ static void render_bg_im2_vs(int line, int width, int odd)
if(shift)
{
dst = (uint32 *)&buf[0x10 + shift + (start<<4)];
#ifdef LSB_FIRST
v_line = (line + (reg[12] & 1) ? ((vs[start] >> 1) & 0x3FF) : 0) & pf_row_mask;
#else
v_line = (line + (reg[12] & 1) ? ((vs[start] >> 17) & 0x3FF) : 0) & pf_row_mask;
#endif
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
v_line = (((v_line & 7) << 1) | odd) << 3;
nt = (uint32 *)&vram[ntab + (((line >> 3) << pf_shift) & 0x1FC0)];
v_line = (((line & 7) << 1) | odd) << 3;
/* Window bug */
if (start) atbuf = nt[index & pf_col_mask];