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snes.c: Fixed scrolling problems [Fabio Priuli]

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This commit is contained in:
Fabio Priuli 2010-03-07 01:54:13 +00:00
parent 1fc5a88650
commit 898ae95fbb
1 changed files with 41 additions and 38 deletions
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51
src/mame/video/snes.c
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@ -287,7 +287,9 @@ INLINE void snes_draw_tile( UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x,
if (!hires)
{
if (scanlines[SNES_MAINSCREEN].enable)
if (ii >= 0 && ii < (SNES_SCR_WIDTH << hires) && scanlines[SNES_MAINSCREEN].enable)
{
if (scanlines[SNES_MAINSCREEN].priority[ii] <= priority)
{
UINT8 clr = colour;
@ -300,8 +302,6 @@ INLINE void snes_draw_tile( UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x,
/* Only draw if we have a colour (0 == transparent) */
if (clr)
{
if ((scanlines[SNES_MAINSCREEN].priority[ii] <= priority) && (ii >= 0))
{
if (direct_colors)
{
@ -336,7 +336,9 @@ INLINE void snes_draw_tile( UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x,
}
}
if (scanlines[SNES_SUBSCREEN].enable)
if (ii >= 0 && ii < (SNES_SCR_WIDTH << hires) && scanlines[SNES_SUBSCREEN].enable)
{
if (scanlines[SNES_SUBSCREEN].priority[ii] <= priority)
{
UINT8 clr = colour;
@ -349,8 +351,6 @@ INLINE void snes_draw_tile( UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x,
/* Only draw if we have a colour (0 == transparent) */
if (clr)
{
if ((scanlines[SNES_SUBSCREEN].priority[ii] <= priority) && (ii >= 0))
{
if (direct_colors)
{
@ -387,9 +387,9 @@ INLINE void snes_draw_tile( UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x,
}
else /* hires */
{
if (ii >= 0 && (ii & 1) && scanlines[SNES_MAINSCREEN].enable)
if (ii >= 0 && ii < (SNES_SCR_WIDTH << hires) && (ii & 1) && scanlines[SNES_MAINSCREEN].enable)
{
if ((scanlines[SNES_MAINSCREEN].priority[ii >> 1] <= priority))
if (scanlines[SNES_MAINSCREEN].priority[ii >> 1] <= priority)
{
UINT8 clr = colour;
@ -435,9 +435,9 @@ INLINE void snes_draw_tile( UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x,
}
}
if (ii >= 0 && !(ii & 1) && scanlines[SNES_SUBSCREEN].enable)
if (ii >= 0 && ii < (SNES_SCR_WIDTH << hires) && !(ii & 1) && scanlines[SNES_SUBSCREEN].enable)
{
if ((scanlines[SNES_SUBSCREEN].priority[ii >> 1] <= priority))
if (scanlines[SNES_SUBSCREEN].priority[ii >> 1] <= priority)
{
UINT8 clr = colour;
@ -636,7 +636,8 @@ INLINE void snes_update_line( UINT8 color_depth, UINT8 hires, UINT8 priority_a,
UINT32 tmap, tile, xoff, yoff;
UINT32 charaddr;
UINT16 ii = 0, vflip, hflip, pal, pal_direct;
INT8 tile_line;
INT8 yscroll;
UINT8 xscroll;
UINT8 priority;
UINT32 addr;
UINT16 tilemap;
@ -676,11 +677,13 @@ INLINE void snes_update_line( UINT8 color_depth, UINT8 hires, UINT8 priority_a,
xoff = snes_ppu.layer[layer].hoffs;
yoff = snes_ppu.layer[layer].voffs;
xscroll = xoff & ((1 << (3 + tile_size)) - 1);
/* Jump to base map address */
tmap = snes_ppu.layer[layer].tilemap << 9;
charaddr = snes_ppu.layer[layer].charmap << 13;
while (ii < 256)
while (ii < 256 + (8 << tile_size))
{
// determine the horizontal position (Bishojo Janshi Suchi Pai & Desert Figther have tile_size & hires == 1)
UINT32 xpos = xoff + (ii << (tile_size * hires));
@ -749,52 +752,52 @@ INLINE void snes_update_line( UINT8 color_depth, UINT8 hires, UINT8 priority_a,
}
/* figure out which line to draw */
tile_line = ypos & ((8 << tile_size) - 1);
yscroll = ypos & ((8 << tile_size) - 1);
if (tile_line > ((8 << tile_size) - 1)) /* scrolled into the next tile */
tile_line -= (8 << tile_size);
if (yscroll > ((8 << tile_size) - 1)) /* scrolled into the next tile */
yscroll -= (8 << tile_size);
if (vflip)
{
if (tile_size)
{
if (tile_line > 7)
if (yscroll > 7)
{
tile_line -= 8;
yscroll -= 8;
}
else
{
tile += 32 / tile_divider;
}
}
tile_line = -tile_line + 7;
yscroll = -yscroll + 7;
}
else
{
if (tile_line > 7)
if (yscroll > 7)
{
tile += 32 / tile_divider;
tile_line -= 8;
yscroll -= 8;
}
}
tile_line <<= 1;
yscroll <<= 1;
/* below, only color_planes depends on color_depth */
if (hires) /* Hi-Res: 2bpp & 4bpp */
{
snes_draw_tile_x2(color_planes, layer, charaddr + (tile * 8 * color_planes) + tile_line, ii * 2, priority, hflip, direct_colors, direct_colors ? pal_direct : pal, hires);
snes_draw_tile_x2(color_planes, layer, charaddr + (tile * 8 * color_planes) + yscroll, (ii - xscroll) * 2, priority, hflip, direct_colors, direct_colors ? pal_direct : pal, hires);
ii += 8;
}
else /* tile_size = 0 */
{
if (tile_size)
{
snes_draw_tile_x2(color_planes, layer, charaddr + (tile * 8 * color_planes) + tile_line, ii, priority, hflip, direct_colors, direct_colors ? pal_direct : pal, hires);
snes_draw_tile_x2(color_planes, layer, charaddr + (tile * 8 * color_planes) + yscroll, ii - xscroll, priority, hflip, direct_colors, direct_colors ? pal_direct : pal, hires);
ii += 16;
}
else /* No Hi-Res: 2bpp, 4bpp & 8bpp */
{
snes_draw_tile(color_planes, layer, charaddr + (tile * 8 * color_planes) + tile_line, ii, priority, hflip, direct_colors, direct_colors ? pal_direct : pal, hires);
snes_draw_tile(color_planes, layer, charaddr + (tile * 8 * color_planes) + yscroll, ii - xscroll, priority, hflip, direct_colors, direct_colors ? pal_direct : pal, hires);
ii += 8;
}
}