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ygv608.cpp: sprite drawing cleanups (nw)

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This commit is contained in:
angelosa 2017-09-28 00:19:06 +02:00
parent 16689994a7
commit a07bc6c5ea
1 changed files with 41 additions and 145 deletions
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186
src/mame/video/ygv608.cpp
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@ -982,7 +982,11 @@ void ygv608_device::register_state_save()
void ygv608_device::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect)
{
#ifdef _ENABLE_SPRITES
const int sprite_limits[4] = { 512-8, 512-16, 512-32, 512-64 };
const uint32_t spritebank_size[4] = { 0x10000, 0x4000, 0x1000, 0x400 };
const int sprite_shift[4] = { 8, 6, 4, 2 };
const int sprite_mask[4] = { 0xff, 0xfc, 0xf0, 0xc0 };
const int spf_shift[4] = { -1, 0, +1, +2 };
// sprites are always clipped to 512x512
// - regardless of the visible display dimensions
rectangle spriteClip(0, 512, 0, 512);
@ -1021,152 +1025,44 @@ void ygv608_device::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect
flipx = (g_attr & SZ_HORIZREVERSE) != 0;
flipy = (g_attr & SZ_VERTREVERSE) != 0;
}
switch( size )
// calculate code and apply sprite base address
code = ( (int)(m_sprite_bank & sprite_mask[size]) << sprite_shift[size] ) | (int)sa->sn;
// apply spf to color (invalidates individual attribute bits for color)
if (spf != 0)
color = ( code >> ( (spf + spf_shift[size]) * 2 ) ) & 0x0f;
// check code boundary (TODO: do we really need this?)
if( code >= layout_total(size) )
{
case SZ_8X8:
code = ( (int)m_sprite_bank << 8 ) | (int)sa->sn;
if (spf != 0)
color = ( code >> ( (spf - 1) * 2 ) ) & 0x0f;
if( code >= layout_total(GFX_8X8_4BIT) )
{
logerror( "SZ_8X8: sprite=%d\n", code );
code = 0;
}
gfx(GFX_8X8_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x10000,
color,
flipx,flipy,
sx,sy,0x00);
// redraw with wrap-around
if( sx > 512-8 )
gfx(GFX_8X8_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x10000,
color,
flipx,flipy,
sx-512,sy,0x00);
if( sy > 512-8 )
gfx(GFX_8X8_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x10000,
color,
flipx,flipy,
sx,sy-512,0x00);
if( sx > 512-8 && sy > 512-8)
gfx(GFX_8X8_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x10000,
color,
flipx,flipy,
sx-512,sy-512,0x00);
break;
case SZ_16X16:
code = ( ( (int)m_sprite_bank & 0xfc ) << 6 ) | (int)sa->sn;
if (spf != 0)
color = ( code >> (spf * 2) ) & 0x0f;
if( code >= layout_total(GFX_16X16_4BIT) )
{
logerror( "SZ_8X8: sprite=%d\n", code );
code = 0;
}
gfx(GFX_16X16_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x4000,
color,
flipx,flipy,
sx,sy,0x00);
// redraw with wrap-around
if( sx > 512-16 )
gfx(GFX_16X16_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x4000,
color,
flipx,flipy,
sx-512,sy,0x00);
if( sy > 512-16 )
gfx(GFX_16X16_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x4000,
color,
flipx,flipy,
sx,sy-512,0x00);
if( sx > 512-16 && sy > 512-16)
gfx(GFX_16X16_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x4000,
color,
flipx,flipy,
sx-512,sy-512,0x00);
break;
case SZ_32X32:
code = ( ( (int)m_sprite_bank & 0xf0 ) << 4 ) | (int)sa->sn;
if (spf != 0)
color = ( code >> ( (spf + 1) * 2 ) ) & 0x0f;
if( code >= layout_total(GFX_32X32_4BIT) )
{
logerror( "SZ_32X32: sprite=%d\n", code );
code = 0;
}
gfx(GFX_32X32_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x1000,
color,
flipx,flipy,
sx,sy,0x00);
// redraw with wrap-around
if( sx > 512-32 )
gfx(GFX_32X32_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x1000,
color,
flipx,flipy,
sx-512,sy,0x00);
if( sy > 512-32 )
gfx(GFX_32X32_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x1000,
color,
flipx,flipy,
sx,sy-512,0x00);
if( sx > 512-32 && sy > 512-32)
gfx(GFX_32X32_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x1000,
color,
flipx,flipy,
sx-512,sy-512,0x00);
break;
case SZ_64X64:
code = ( ( (int)m_sprite_bank & 0xc0 ) << 2 ) | (int)sa->sn;
if (spf != 0)
color = ( code >> ( (spf + 1) * 2 ) ) & 0x0f;
if( code >= layout_total(GFX_64X64_4BIT) )
{
logerror( "SZ_64X64: sprite=%d\n", code );
code = 0;
}
gfx(GFX_64X64_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x400,
color,
flipx,flipy,
sx,sy,0x00);
// redraw with wrap-around
if( sx > 512-64 )
gfx(GFX_64X64_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x400,
color,
flipx,flipy,
sx-512,sy,0x00);
if( sy > 512-64 )
gfx(GFX_64X64_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x400,
color,
flipx,flipy,
sx,sy-512,0x00);
if( sx > 512-64 && sy > 512-64 )
gfx(GFX_64X64_4BIT)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*0x400,
color,
flipx,flipy,
sx-512,sy-512,0x00);
break;
default:
break;
logerror( "SZ_%d: sprite=%d\n", size, code );
code = 0;
}
// draw the sprite
gfx(size)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*spritebank_size[size],
color,
flipx,flipy,
sx,sy,0x00);
// draw with wraparound
if(sx > sprite_limits[size] || sy > sprite_limits[size] )
{
gfx(size)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*spritebank_size[size],
color,
flipx,flipy,
sx-512,sy,0x00);
gfx(size)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*spritebank_size[size],
color,
flipx,flipy,
sx,sy-512,0x00);
gfx(size)->transpen(bitmap,spriteClip,
code+m_namcond1_gfxbank*spritebank_size[size],
color,
flipx,flipy,
sx-512,sy-512,0x00);
}
}
#endif