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popobear - better layer enables / scrolling.

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This commit is contained in:
David Haywood 2013-03-13 10:17:20 +00:00
parent 83e7c659dd
commit 34c0f89193
1 changed files with 28 additions and 33 deletions
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61
src/mame/drivers/popobear.c
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@ -8,7 +8,6 @@
- auto-animation speed is erratic (way too fast);
- tilemap effects (scrolling, colscroll, linescroll);
(high score table?)
- BMC logo isn't copied correctly after an attract loop, RAM not cleared on a reset either?
- BGM seems quite off, YM2413 core bug?
- I/Os;
- IRQ generation;
@ -116,7 +115,6 @@ public:
virtual void video_start();
UINT32 screen_update_popobear(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
TIMER_DEVICE_CALLBACK_MEMBER(popobear_irq);
void draw_layer(bitmap_ind16 &bitmap,const rectangle &cliprect, UINT8 layer_n);
void draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect);
int m_gfx_index;
@ -230,33 +228,6 @@ void popobear_state::video_start()
}
void popobear_state::draw_layer(bitmap_ind16 &bitmap,const rectangle &cliprect, UINT8 layer_n)
{
UINT16* vreg = (UINT16 *)m_vregs;
const UINT8 vreg_base[] = { 0x10/2, 0x14/2 };
int xscroll,yscroll;
if(layer_n & 2)
{
xscroll = vreg[vreg_base[(layer_n & 1) ^ 1]+2/2] & 0x1ff;
yscroll = vreg[vreg_base[(layer_n & 1) ^ 1]+0/2] & 0x1ff;
}
else
{
xscroll = 0;
yscroll = 0;
}
popmessage("%04x %04x",vreg[vreg_base[0]+0/2],vreg[vreg_base[1]+0/2]);
m_bg_tilemap[layer_n]->set_scrolly(0, yscroll);
m_bg_tilemap[layer_n]->set_scrollx(0, xscroll);
m_bg_tilemap[layer_n]->draw(bitmap, cliprect, 0, 0);
}
void popobear_state::draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect)
@ -321,11 +292,35 @@ UINT32 popobear_state::screen_update_popobear(screen_device &screen, bitmap_ind1
bitmap.fill(0, cliprect);
//popmessage("%04x",m_vregs[0/2]);
UINT16* vreg = m_vregs;
draw_layer(bitmap,cliprect,3);
draw_layer(bitmap,cliprect,2);
draw_layer(bitmap,cliprect,1);
draw_layer(bitmap,cliprect,0);
popmessage("%04x %04x %04x %04x %04x %04x %04x - %04x - %04x %04x",vreg[0x00],vreg[0x01],vreg[0x02],vreg[0x03],vreg[0x04],vreg[0x05],vreg[0x06], vreg[0x0b],vreg[0x0e],vreg[0x0f]);
// these are more than just enable, they get written with 0x0d and 0x1f (and 0x00 when a layer is off)
// it might relate to the linescroll modes or sizes?
int enable0 = (m_vregs[0x0c] & 0xff00)>>8;
int enable1 = (m_vregs[0x0c] & 0x00ff)>>0;
int enable2 = (m_vregs[0x0d] & 0xff00)>>8;
int enable3 = (m_vregs[0x0d] & 0x00ff)>>0;
if ((enable0 != 0x00) && (enable0 != 0x0d) && (enable0 != 0x1f)) printf("unknown enable0 value %02x\n", enable0);
if ((enable1 != 0x00) && (enable1 != 0x0d) && (enable1 != 0x1f)) printf("unknown enable1 value %02x\n", enable1);
if ((enable2 != 0x00) && (enable2 != 0x0d) && (enable2 != 0x1f)) printf("unknown enable2 value %02x\n", enable2);
if ((enable3 != 0x00) && (enable3 != 0x0d) && (enable3 != 0x1f)) printf("unknown enable3 value %02x\n", enable3);
m_bg_tilemap[2]->set_scrollx(0, vreg[0x07]);
m_bg_tilemap[2]->set_scrolly(0, vreg[0x08]);
m_bg_tilemap[3]->set_scrollx(0, vreg[0x09]);
m_bg_tilemap[3]->set_scrolly(0, vreg[0x0a]);
if (enable3) m_bg_tilemap[3]->draw(bitmap, cliprect, 0, 0);
if (enable2) m_bg_tilemap[2]->draw(bitmap, cliprect, 0, 0);
if (enable1) m_bg_tilemap[1]->draw(bitmap, cliprect, 0, 0);
if (enable0) m_bg_tilemap[0]->draw(bitmap, cliprect, 0, 0);
draw_sprites(bitmap,cliprect);
return 0;