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Work-around for VDP1 framebuffer clear, fixes Daisenryaku Strong Style regression

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This commit is contained in:
Angelo Salese 2013-03-04 01:21:53 +00:00
parent 6a2f6c84f6
commit d2f31bdcbf
1 changed files with 17 additions and 6 deletions
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23
src/emu/video/stvvdp1.c
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@ -180,19 +180,30 @@ READ16_MEMBER( saturn_state::saturn_vdp1_regs_r )
return m_vdp1_regs[offset]; //TODO: write-only regs should return open bus or zero
}
/* TODO: TVM & 1 is just a kludgy work-around, the VDP1 actually needs to be rewritten from scratch. */
/* Daisenryaku Strong Style (daisenss) uses it */
void saturn_state::stv_clear_framebuffer( int which_framebuffer )
{
int start_x, end_x, start_y, end_y;
start_x = STV_VDP1_EWLR_X1 * 8;
start_x = STV_VDP1_EWLR_X1 * ((STV_VDP1_TVM & 1) ? 16 : 8);
start_y = STV_VDP1_EWLR_Y1 * (m_vdp1.framebuffer_double_interlace+1);
end_x = STV_VDP1_EWRR_X3 * 8;
end_x = STV_VDP1_EWRR_X3 * ((STV_VDP1_TVM & 1) ? 16 : 8);
end_y = (STV_VDP1_EWRR_Y3+1) * (m_vdp1.framebuffer_double_interlace+1);
// popmessage("%d %d %d %d",STV_VDP1_EWLR_X1,STV_VDP1_EWLR_Y1,STV_VDP1_EWRR_X3,STV_VDP1_EWRR_Y3,m_vdp1.framebuffer_double_interlace);
// popmessage("%d %d %d %d %d",STV_VDP1_EWLR_X1,STV_VDP1_EWLR_Y1,STV_VDP1_EWRR_X3,STV_VDP1_EWRR_Y3,m_vdp1.framebuffer_double_interlace);
for(int y=start_y;y<end_y;y++)
for(int x=start_x;x<end_x;x++)
m_vdp1.framebuffer[ which_framebuffer ][(x+y*512)] = m_vdp1.ewdr;
if(STV_VDP1_TVM & 1)
{
for(int y=start_y;y<end_y;y++)
for(int x=start_x;x<end_x;x++)
m_vdp1.framebuffer[ which_framebuffer ][(x+y*1024)] = m_vdp1.ewdr;
}
else
{
for(int y=start_y;y<end_y;y++)
for(int x=start_x;x<end_x;x++)
m_vdp1.framebuffer[ which_framebuffer ][(x+y*512)] = m_vdp1.ewdr;
}
if ( VDP1_LOG ) logerror( "Clearing %d framebuffer\n", m_vdp1.framebuffer_current_draw );
// memset( m_vdp1.framebuffer[ which_framebuffer ], m_vdp1.ewdr, 1024 * 256 * sizeof(UINT16) * 2 );