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SNES video updates, take two:

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* further simplification of tile drawing routines
* added palette index to 8bpp tiles (correct color_shift still unsure, though)
This commit is contained in:
Fabio Priuli 2009-08-06 11:09:24 +00:00
parent 80f73ab376
commit 50ee0930d2
1 changed files with 36 additions and 156 deletions
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192
src/mame/video/snes.c
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@ -270,11 +270,11 @@ INLINE void snes_draw_blend(UINT16 offset, UINT16 *colour, UINT8 mode, UINT8 cli
/*****************************************
* snes_draw_tile_common()
* snes_draw_tile()
*
* Draw tiles with variable bit planes
*****************************************/
INLINE void snes_draw_tile_common(UINT8 screen, UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT16 pal )
INLINE void snes_draw_tile(UINT8 screen, UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT16 pal )
{
UINT8 mask, plane[8];
UINT16 c;
@ -347,89 +347,21 @@ INLINE void snes_draw_tile_common(UINT8 screen, UINT8 planes, UINT8 layer, UINT1
}
/*****************************************
* snes_draw_tile_2()
* snes_draw_tile_x2()
*
* Draw tiles with 2 bit planes(4 colors)
* Draw 2 tiles with variable bit planes
*****************************************/
INLINE void snes_draw_tile_2(UINT8 screen, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT16 pal )
{
snes_draw_tile_common(screen, 2, layer, tileaddr, x, priority, flip, pal);
}
/*****************************************
* snes_draw_tile_2x2()
*
* Draw 2 tiles with 2 bit planes(4 colors)
*****************************************/
INLINE void snes_draw_tile_2x2(UINT8 screen, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT16 pal )
INLINE void snes_draw_tile_x2(UINT8 screen, UINT8 planes, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT16 pal )
{
if( flip )
{
snes_draw_tile_2(screen, layer, tileaddr + 16, x, priority, flip, pal);
snes_draw_tile_2(screen, layer, tileaddr, x + 8, priority, flip, pal);
snes_draw_tile(screen, planes, layer, tileaddr + (8 * planes), x, priority, flip, pal);
snes_draw_tile(screen, planes, layer, tileaddr, x + 8, priority, flip, pal);
}
else
{
snes_draw_tile_2(screen, layer, tileaddr, x, priority, flip, pal);
snes_draw_tile_2(screen, layer, tileaddr + 16, x + 8, priority, flip, pal);
}
}
/*****************************************
* snes_draw_tile_4()
*
* Draw tiles with 4 bit planes(16 colors)
*****************************************/
INLINE void snes_draw_tile_4(UINT8 screen, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT16 pal )
{
snes_draw_tile_common(screen, 4, layer, tileaddr, x, priority, flip, pal);
}
/*****************************************
* snes_draw_tile_4x2()
*
* Draw 2 tiles with 4 bit planes(16 colors)
*****************************************/
INLINE void snes_draw_tile_4x2(UINT8 screen, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT16 pal )
{
if( flip )
{
snes_draw_tile_4(screen, layer, tileaddr + 32, x, priority, flip, pal);
snes_draw_tile_4(screen, layer, tileaddr, x + 8, priority, flip, pal);
}
else
{
snes_draw_tile_4(screen, layer, tileaddr, x, priority, flip, pal);
snes_draw_tile_4(screen, layer, tileaddr + 32, x + 8, priority, flip, pal);
}
}
/*****************************************
* snes_draw_tile_8()
*
* Draw tiles with 8 bit planes(256 colors)
*****************************************/
INLINE void snes_draw_tile_8(UINT8 screen, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip )
{
snes_draw_tile_common(screen, 8, layer, tileaddr, x, priority, flip, 0);
}
/*****************************************
* snes_draw_tile_8x2()
*
* Draw 2 tiles with 8 bit planes(256 colors)
*****************************************/
INLINE void snes_draw_tile_8x2(UINT8 screen, UINT8 layer, UINT16 tileaddr, INT16 x, UINT8 priority, UINT8 flip )
{
if( flip )
{
snes_draw_tile_8(screen, layer, tileaddr + 64, x, priority, flip);
snes_draw_tile_8(screen, layer, tileaddr, x + 8, priority, flip);
}
else
{
snes_draw_tile_8(screen, layer, tileaddr, x, priority, flip);
snes_draw_tile_8(screen, layer, tileaddr + 64, x + 8, priority, flip);
snes_draw_tile(screen, planes, layer, tileaddr, x, priority, flip, pal);
snes_draw_tile(screen, planes, layer, tileaddr + (8 * planes), x + 8, priority, flip, pal);
}
}
@ -577,8 +509,10 @@ INLINE void snes_update_line_common( UINT8 screen, UINT8 color_depth, UINT8 hire
UINT16 vscroll, hscroll, vtilescroll;
UINT8 vshift, hshift, tile_size;
UINT8 bg3_pty = 0;
UINT8 color_shift = 0;
UINT8 divider = 1;
/* variables depending on color_depth */
UINT8 color_shift = 0;
UINT8 color_planes = 2;
UINT8 tile_divider = 1;
#ifdef MAME_DEBUG
if (debug_options.bg_disabled[layer])
@ -630,16 +564,19 @@ INLINE void snes_update_line_common( UINT8 screen, UINT8 color_depth, UINT8 hire
switch (color_depth)
{
case SNES_COLOR_DEPTH_2BPP:
divider = 2;
color_shift = 0;
color_planes = 2;
tile_divider = 2;
break;
case SNES_COLOR_DEPTH_4BPP:
divider = 2;
color_shift = 2;
color_planes = 4;
tile_divider = 2;
break;
case SNES_COLOR_DEPTH_8BPP:
divider = 4;
color_shift = 6; // 2009-08 FP: this should be 6 or 8, if I'm following correctly the drawing code
color_planes = 8;
tile_divider = 4;
break;
}
@ -680,7 +617,7 @@ INLINE void snes_update_line_common( UINT8 screen, UINT8 color_depth, UINT8 hire
}
else
{
tile += 32 / divider;
tile += 32 / tile_divider;
}
}
tile_line = -tile_line + 7;
@ -689,7 +626,7 @@ INLINE void snes_update_line_common( UINT8 screen, UINT8 color_depth, UINT8 hire
{
if (line > 7)
{
tile += 32 / divider;
tile += 32 / tile_divider;
tile_line -= 8;
}
}
@ -699,91 +636,33 @@ INLINE void snes_update_line_common( UINT8 screen, UINT8 color_depth, UINT8 hire
if (layer == 2 && bg3_pty && (snes_vram[tmap + ii + 1] & 0x20))
priority = table_obj_pty[snes_ppu.mode][3] + 1; /* We want to have the highest priority here */
/* The code below can probably simplified even more, by directly calling snes_draw_tile_common... */
/* below, only color_planes depends on color_depth */
if (tile_size)
{
if (hires) /* Hi-Res: 2bpp & 4bpp */
{
if (hflip)
{
switch (color_depth)
{
case SNES_COLOR_DEPTH_2BPP:
snes_draw_tile_2x2(screen, layer, snes_ppu.layer[layer].data + (tile << 4) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1) + 16, priority, hflip, pal );
snes_draw_tile_2x2(screen, layer, snes_ppu.layer[layer].data + ((tile + 2) << 4) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal );
break;
case SNES_COLOR_DEPTH_4BPP:
snes_draw_tile_4x2(screen, layer, snes_ppu.layer[layer].data + (tile << 5) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1) + 16, priority, hflip, pal );
snes_draw_tile_4x2(screen, layer, snes_ppu.layer[layer].data + ((tile + 2) << 5) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal );
break;
}
snes_draw_tile_x2(screen, color_planes, layer, snes_ppu.layer[layer].data + (tile * 8 * color_planes) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1) + 16, priority, hflip, pal);
snes_draw_tile_x2(screen, color_planes, layer, snes_ppu.layer[layer].data + ((tile + 2) * 8 * color_planes) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal);
}
else
{
switch (color_depth)
{
case SNES_COLOR_DEPTH_2BPP:
snes_draw_tile_2x2(screen, layer, snes_ppu.layer[layer].data + (tile << 4) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal );
snes_draw_tile_2x2(screen, layer, snes_ppu.layer[layer].data + ((tile + 2) << 4) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1) + 16, priority, hflip, pal );
break;
case SNES_COLOR_DEPTH_4BPP:
snes_draw_tile_4x2(screen, layer, snes_ppu.layer[layer].data + (tile << 5) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal );
snes_draw_tile_4x2(screen, layer, snes_ppu.layer[layer].data + ((tile + 2) << 5) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1) + 16, priority, hflip, pal );
break;
}
snes_draw_tile_x2(screen, color_planes, layer, snes_ppu.layer[layer].data + (tile * 8 * color_planes) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal);
snes_draw_tile_x2(screen, color_planes, layer, snes_ppu.layer[layer].data + ((tile + 2) * 8 * color_planes) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1) + 16, priority, hflip, pal);
}
}
else /* No Hi-Res: 2bpp, 4bpp & 8bpp */
{
switch (color_depth)
{
case SNES_COLOR_DEPTH_2BPP:
snes_draw_tile_2x2(screen, layer, snes_ppu.layer[layer].data + (tile << 4) + tile_line, ((ii >> 1) * (8 << tile_size)) - hshift, priority, hflip, pal );
break;
case SNES_COLOR_DEPTH_4BPP:
snes_draw_tile_4x2(screen, layer, snes_ppu.layer[layer].data + (tile << 5) + tile_line, ((ii >> 1) * (8 << tile_size)) - hshift, priority, hflip, pal );
break;
case SNES_COLOR_DEPTH_8BPP:
snes_draw_tile_8x2(screen, layer, snes_ppu.layer[layer].data + (tile << 6) + tile_line, ((ii >> 1) * (8 << tile_size)) - hshift, priority, hflip );
break;
}
snes_draw_tile_x2(screen, color_planes, layer, snes_ppu.layer[layer].data + (tile * 8 * color_planes) + tile_line, ((ii >> 1) * (8 << tile_size)) - hshift, priority, hflip, pal);
}
}
else /* tile_size = 0 */
{
if (hires) /* Hi-Res: 2bpp & 4bpp */
{
switch (color_depth)
{
case SNES_COLOR_DEPTH_2BPP:
snes_draw_tile_2x2(screen, layer, snes_ppu.layer[layer].data + (tile << 4) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal );
break;
case SNES_COLOR_DEPTH_4BPP:
snes_draw_tile_4x2(screen, layer, snes_ppu.layer[layer].data + (tile << 5) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal );
break;
}
}
snes_draw_tile_x2(screen, color_planes, layer, snes_ppu.layer[layer].data + (tile * 8 * color_planes) + tile_line, ((ii >> 1) * (8 << (tile_size + 1))) - (hshift << 1), priority, hflip, pal);
else /* No Hi-Res: 2bpp, 4bpp & 8bpp */
{
switch (color_depth)
{
case SNES_COLOR_DEPTH_2BPP:
snes_draw_tile_2(screen, layer, snes_ppu.layer[layer].data + (tile << 4) + tile_line, ((ii >> 1) * (8 << tile_size)) - hshift, priority, hflip, pal );
break;
case SNES_COLOR_DEPTH_4BPP:
snes_draw_tile_4(screen, layer, snes_ppu.layer[layer].data + (tile << 5) + tile_line, ((ii >> 1) * (8 << tile_size)) - hshift, priority, hflip, pal );
break;
case SNES_COLOR_DEPTH_8BPP:
snes_draw_tile_8(screen, layer, snes_ppu.layer[layer].data + (tile << 6) + tile_line, ((ii >> 1) * (8 << tile_size)) - hshift, priority, hflip );
break;
}
}
snes_draw_tile(screen, color_planes, layer, snes_ppu.layer[layer].data + (tile * 8 * color_planes) + tile_line, ((ii >> 1) * (8 << tile_size)) - hshift, priority, hflip, pal);
}
}
}
@ -1536,14 +1415,15 @@ static void snes_dbg_draw_maps( bitmap_t *bitmap, UINT32 tmap, UINT8 bpl, UINT16
switch( bpl )
{
case 1:
snes_draw_tile_2(MAINSCREEN, layer, snes_ppu.layer[layer].data + (tile << 4) + ((curline % 8) * 2), (ii >> 1) * 8, 255, hflip, pal );
snes_draw_tile(MAINSCREEN, 2, layer, snes_ppu.layer[layer].data + (tile << 4) + ((curline % 8) * 2), (ii >> 1) * 8, 255, hflip, pal);
break;
case 2:
pal <<= 2;
snes_draw_tile_4(MAINSCREEN, layer, snes_ppu.layer[layer].data + (tile << 5) + ((curline % 8) * 2), (ii >> 1) * 8, 255, hflip, pal );
snes_draw_tile(MAINSCREEN, 4, layer, snes_ppu.layer[layer].data + (tile << 5) + ((curline % 8) * 2), (ii >> 1) * 8, 255, hflip, pal);
break;
case 4:
snes_draw_tile_8(MAINSCREEN, layer, snes_ppu.layer[layer].data + (tile << 6) + ((curline % 8) * 2), (ii >> 1) * 8, 255, hflip );
pal <<= 6; // 2009-08 FP: it might be 8... still to investigate
snes_draw_tile(MAINSCREEN, 8, layer, snes_ppu.layer[layer].data + (tile << 6) + ((curline % 8) * 2), (ii >> 1) * 8, 255, hflip, pal);
break;
}
}
@ -1573,13 +1453,13 @@ static void snes_dbg_draw_all_tiles( running_machine *machine, bitmap_t *bitmap,
switch( bpl )
{
case 1:
snes_draw_tile_2(MAINSCREEN, 0, addr, ii * 8, 255, 0, pal );
snes_draw_tile(MAINSCREEN, 2, 0, addr, ii * 8, 255, 0, pal);
break;
case 2:
snes_draw_tile_4(MAINSCREEN, 0, addr, ii * 8, 255, 0, pal );
snes_draw_tile(MAINSCREEN, 4, 0, addr, ii * 8, 255, 0, pal);
break;
case 4:
snes_draw_tile_8(MAINSCREEN, 0, addr, ii * 8, 255, 0 );
snes_draw_tile(MAINSCREEN, 8, 0, addr, ii * 8, 255, 0, pal);
break;
}
addr += (bpl * 16);