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namcona1.c: rewrite tilemap drawing, fixing MT 05499 [Alex Jackson]

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This commit is contained in:
Alex W. Jackson 2014-04-09 04:51:39 +00:00
parent f87bffdce2
commit 50d5da645d
1 changed files with 56 additions and 69 deletions
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125
src/mame/video/namcona1.c
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@ -265,10 +265,6 @@ WRITE16_MEMBER(namcona1_state::namcona1_gfxram_w)
}
} /* namcona1_gfxram_w */
static void UpdateGfx(running_machine &machine)
{
} /* UpdateGfx */
void namcona1_state::video_start()
{
m_roz_tilemap = &machine().tilemap().create(m_gfxdecode, tilemap_get_info_delegate(FUNC(namcona1_state::roz_get_info),this), TILEMAP_SCAN_ROWS, 8,8,64,64 );
@ -537,77 +533,68 @@ static void draw_pixel_line( UINT16 *pDest, UINT8 *pPri, UINT16 *pSource, const
void namcona1_state::draw_background(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int which, int primask )
{
UINT16 *videoram = m_videoram;
/* scrollx lineselect
* tmap0 ffe000 ffe200
* tmap1 ffe400 ffe600
* tmap2 ffe800 ffea00
* tmap3 ffec00 ffee00
*/
int xadjust = 0x3a - which*2;
const UINT16 *scroll = m_scroll+0x200*which;
int line;
UINT16 xdata, ydata;
int scrollx, scrolly;
rectangle clip;
const pen_t *paldata;
gfx_element *pGfx;
pGfx = m_gfxdecode->gfx(0);
assert(which >= 0 && which < ARRAY_LENGTH(m_tilemap_palette_bank));
paldata = &m_palette->pen(pGfx->colorbase() + pGfx->granularity() * m_tilemap_palette_bank[which]);
/* draw one scanline at a time */
clip.min_x = cliprect.min_x;
clip.max_x = cliprect.max_x;
scrollx = 0;
scrolly = 0;
for( line=0; line<256; line++ )
if(which == NAMCONA1_NUM_TILEMAPS )
{
clip.min_y = line;
clip.max_y = line;
xdata = scroll[line];
if( xdata )
{
/* screenwise linescroll */
scrollx = xadjust+xdata;
}
ydata = scroll[line+0x100];
if( ydata&0x4000 )
{
/* line select: dword offset from 0xff000 or tilemap source line */
scrolly = (ydata - line)&0x1ff;
}
/* draw roz all at once */
int incxx = ((INT16)m_vreg[0xc0/2])<<8;
int incxy = ((INT16)m_vreg[0xc2/2])<<8;
int incyx = ((INT16)m_vreg[0xc4/2])<<8;
int incyy = ((INT16)m_vreg[0xc6/2])<<8;
INT16 xoffset = m_vreg[0xc8/2];
INT16 yoffset = m_vreg[0xca/2];
int dx = 46; /* horizontal adjust */
int dy = -8; /* vertical adjust */
UINT32 startx = (xoffset<<12)+incxx*dx+incyx*dy;
UINT32 starty = (yoffset<<12)+incxy*dx+incyy*dy;
m_roz_tilemap->draw_roz(screen, bitmap, cliprect,
startx, starty, incxx, incxy, incyx, incyy, 0, 0, primask, 0);
}
else
{
/* draw one scanline at a time */
/* scrollx lineselect
* tmap0 ffe000 ffe200
* tmap1 ffe400 ffe600
* tmap2 ffe800 ffea00
* tmap3 ffec00 ffee00
*/
const UINT16 *scroll = &m_scroll[which * 0x400/2];
const pen_t *paldata = &m_palette->pen(m_tilemap_palette_bank[which] * 256);
rectangle clip = cliprect;
int xadjust = 0x3a - which*2;
int scrollx = 0;
int scrolly = 0;
if (line >= cliprect.min_y && line <= cliprect.max_y)
for( int line = 0; line < 256; line++ )
{
if( xdata == 0xc001 )
clip.min_y = line;
clip.max_y = line;
int xdata = scroll[line];
int ydata = scroll[line + 0x200/2];
if( xdata )
{
/* This is a simplification, but produces the correct behavior for the only game that uses this
* feature, Numan Athletics.
*/
draw_pixel_line(
&bitmap.pix16(line),
&screen.priority().pix8(line),
videoram + ydata + 25,
paldata );
/* screenwise linescroll */
scrollx = xadjust+xdata;
}
else
if( ydata&0x4000 )
{
if(which == NAMCONA1_NUM_TILEMAPS )
/* line select: dword offset from 0xff000 or tilemap source line */
scrolly = (ydata - line)&0x1ff;
}
if (line >= cliprect.min_y && line <= cliprect.max_y)
{
if( xdata == 0xc001 )
{
int incxx = ((INT16)m_vreg[0xc0/2])<<8;
int incxy = ((INT16)m_vreg[0xc2/2])<<8;
int incyx = ((INT16)m_vreg[0xc4/2])<<8;
int incyy = ((INT16)m_vreg[0xc6/2])<<8;
INT16 xoffset = m_vreg[0xc8/2];
INT16 yoffset = m_vreg[0xca/2];
int dx = 46; /* horizontal adjust */
int dy = -8; /* vertical adjust */
UINT32 startx = (xoffset<<12)+incxx*dx+incyx*dy;
UINT32 starty = (yoffset<<12)+incxy*dx+incyy*dy;
m_roz_tilemap->draw_roz(screen, bitmap, clip,
startx, starty, incxx, incxy, incyx, incyy, 0, 0, primask, 0);
/* This is a simplification, but produces the correct behavior for the only game that uses this
* feature, Numan Athletics.
*/
draw_pixel_line(&bitmap.pix16(line),
&screen.priority().pix8(line),
m_videoram + ydata + 25,
paldata );
}
else
{
@ -638,7 +625,7 @@ UINT32 namcona1_state::screen_update_namcona1(screen_device &screen, bitmap_ind1
}
m_palette_is_dirty = 0;
}
UpdateGfx(machine());
for( which=0; which<NAMCONA1_NUM_TILEMAPS; which++ )
{
int tilemap_color = m_vreg[0xb0/2+(which&3)]&0xf;