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small render_stars speedup for vbt

This commit is contained in:
dinkc64 2019-05-10 19:37:15 -04:00
parent c533c1162e
commit ddd14379a7
1 changed files with 4 additions and 3 deletions
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7
src/burn/drv/konami/d_tutankhm.cpp
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@ -478,7 +478,7 @@ static void render_stars()
if (StarsEnabled) { if (StarsEnabled) {
INT32 StarCounter; INT32 StarCounter;
INT32 SetA, SetB; INT32 SetA, SetB;
INT32 transloc;
SetA = ((nCurrentFrame+0x40) & 0x80) ? 1 : 0; SetA = ((nCurrentFrame+0x40) & 0x80) ? 1 : 0;
SetB = (nCurrentFrame & 0x80) ? 2 : 3; SetB = (nCurrentFrame & 0x80) ? 2 : 3;
@ -490,8 +490,9 @@ static void render_stars()
y = (112 + StarSeedTab[StarCounter].y + StarScrollY) % 256; y = (112 + StarSeedTab[StarCounter].y + StarScrollY) % 256;
if (x >= 0 && x < nScreenWidth && y >= 0 && y < nScreenHeight) { if (x >= 0 && x < nScreenWidth && y >= 0 && y < nScreenHeight) {
if (!pTransDraw[(y * nScreenWidth) + x]) transloc = (y * nScreenWidth) + x;
pTransDraw[(y * nScreenWidth) + x] = StarSeedTab[StarCounter].Colour + 0x20; if (!pTransDraw[transloc])
pTransDraw[transloc] = StarSeedTab[StarCounter].Colour + 0x20;
} }
} }