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gstriker.cpp: added rotation to mb60553 core, used by V Goal Soccer during display of football field [Angelo Salese]

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This commit is contained in:
angelosa 2017-08-30 20:23:56 +02:00
parent a11923f598
commit 6af2a1ff60
1 changed files with 11 additions and 10 deletions
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21
src/mame/video/mb60553.cpp
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@ -270,31 +270,32 @@ void mb60553_zooming_tilemap_device::draw( screen_device &screen, bitmap_ind16&
{
// int scrollx;
// int scrolly;
uint32_t startx,starty;
uint32_t incxx,incyy;
int32_t incxx,incyy;
int32_t incxy,incyx;
float xoffset;
incxx = m_lineram[(line)*8+0]<<4;
incyy = m_lineram[(line)*8+3]<<4;
// confirmed on how ROZ is used
incyy = ((int16_t)m_lineram[(line)*8+0])<<4;
incxx = ((int16_t)m_lineram[(line)*8+3])<<4;
// startx has an offset based off current x zoom value
// This is confirmed by Tecmo World Cup '94 startx being 0xff40 (-192) when showing footballer pics on attract mode (incxx is 0x800)
// TODO: slightly offset?
xoffset = ((float)incxx/(float)0x10000) * 384.0;
xoffset = ((float)incyy/(float)0x10000) * 384.0;
startx = m_regs[0] + (uint32_t)xoffset;
startx = m_regs[0] + (int32_t)xoffset;
starty = m_regs[1];
// TODO: what's this? Used by Grand Striker playfield
// startx -= m_lineram[(line)*8+7]/2;
incyx = ((int16_t)m_lineram[(line)*8+7])<<4;
// V Goal Soccer rotation
incxy = ((int16_t)m_lineram[(line)*8+4])<<4;
clip.min_y = clip.max_y = line;
draw_roz_core(screen, bitmap, clip, startx<<12,starty<<12,
incxx,0,0,incyy,
incxx,incxy,-incyx,incyy,
1
);