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shadfrce - optimize drawing for scanline cases (nw)

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This commit is contained in:
David Haywood 2015-07-26 14:13:23 +01:00
parent 77f208de71
commit b67bb0afd7
2 changed files with 37 additions and 20 deletions
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2
src/mame/includes/shadfrce.h
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@ -83,5 +83,5 @@ public:
UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void screen_eof(screen_device &screen, bool state);
void draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect );
void draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int y_offset );
};

55
src/mame/video/shadfrce.c
View File

@ -101,8 +101,10 @@ WRITE16_MEMBER(shadfrce_state::bg1scrolly_w)
void shadfrce_state::draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect )
void shadfrce_state::draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int y_offset )
{
/* | ---- ---- hhhf Fe-Y | ---- ---- yyyy yyyy | ---- ---- TTTT TTTT | ---- ---- tttt tttt |
| ---- ---- -pCc cccX | ---- ---- xxxx xxxx | ---- ---- ---- ---- | ---- ---- ---- ---- | */
@ -121,29 +123,43 @@ void shadfrce_state::draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, c
UINT16 *finish = m_spvideoram_old;
UINT16 *source = finish + 0x2000/2 - 8;
int hcount;
while( source>=finish )
while (source >= finish)
{
int ypos = 0x100 - (((source[0] & 0x0003) << 8) | (source[1] & 0x00ff));
int xpos = (((source[4] & 0x0001) << 8) | (source[5] & 0x00ff)) + 1;
int tile = ((source[2] & 0x00ff) << 8) | (source[3] & 0x00ff);
int height = (source[0] & 0x00e0) >> 5;
int enable = ((source[0] & 0x0004));
int flipx = ((source[0] & 0x0010) >> 4);
int flipy = ((source[0] & 0x0008) >> 3);
int pal = ((source[4] & 0x003e));
int pri_mask = (source[4] & 0x0040) ? 0x02 : 0x00;
if (pal & 0x20) pal ^= 0x60; /* skip hole */
if (enable)
{
int ypos = 0x100 - (((source[0] & 0x0003) << 8) | (source[1] & 0x00ff));
int height = ((source[0] & 0x00e0) >> 5) ;
height += 1;
height++;
if (enable) {
for (hcount=0;hcount<height;hcount++) {
gfx->prio_transpen(bitmap,cliprect,tile+hcount,pal,flipx,flipy,xpos,ypos-hcount*16-16,screen.priority(),pri_mask,0);
gfx->prio_transpen(bitmap,cliprect,tile+hcount,pal,flipx,flipy,xpos-0x200,ypos-hcount*16-16,screen.priority(),pri_mask,0);
gfx->prio_transpen(bitmap,cliprect,tile+hcount,pal,flipx,flipy,xpos,ypos-hcount*16-16+0x200,screen.priority(),pri_mask,0);
gfx->prio_transpen(bitmap,cliprect,tile+hcount,pal,flipx,flipy,xpos-0x200,ypos-hcount*16-16+0x200,screen.priority(),pri_mask,0);
int bottom = ypos + y_offset;
int top = bottom - height * 16;
if (top > cliprect.max_y || bottom <= cliprect.min_y)
{
source -= 8;
continue;
}
int xpos = (((source[4] & 0x0001) << 8) | (source[5] & 0x00ff)) + 1;
int tile = ((source[2] & 0x00ff) << 8) | (source[3] & 0x00ff);
int flipx = ((source[0] & 0x0010) >> 4);
int flipy = ((source[0] & 0x0008) >> 3);
int pal = ((source[4] & 0x003e));
int pri_mask = (source[4] & 0x0040) ? 0x02 : 0x00;
if (pal & 0x20) pal ^= 0x60; /* skip hole */
for (hcount = 0; hcount < height; hcount++) {
gfx->prio_transpen(bitmap, cliprect, tile + hcount, pal, flipx, flipy, xpos, bottom-16, screen.priority(), pri_mask, 0);
gfx->prio_transpen(bitmap, cliprect, tile + hcount, pal, flipx, flipy, xpos - 0x200, bottom-16, screen.priority(), pri_mask, 0); // x wraparound
bottom -= 16;
}
}
source-=8;
}
}
@ -156,7 +172,8 @@ UINT32 shadfrce_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap
{
m_bg1tilemap->draw(screen, bitmap, cliprect, 0,0);
m_bg0tilemap->draw(screen, bitmap, cliprect, 0,1);
draw_sprites(screen,bitmap,cliprect);
draw_sprites(screen,bitmap,cliprect, 0);
draw_sprites(screen,bitmap,cliprect, 0x200); // y-wrap
m_fgtilemap->draw(screen, bitmap, cliprect, 0,0);
}
else