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fix off by one bug in gfxUsageBits code; fixed small glitch the actor iteration cleanup

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svn-id: r6485
This commit is contained in:
Max Horn 2003-01-16 18:07:52 +00:00
parent 4e07c1bb91
commit 2eff7e2242
3 changed files with 16 additions and 7 deletions
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16
scumm/usage_bits.cpp
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@ -39,17 +39,23 @@ void Scumm::upgradeGfxUsageBits()
void Scumm::setGfxUsageBit(int strip, int bit)
{
gfxUsageBits[3 * strip + bit / 32] |= (1 << ((bit - 1) % 32));
assert(1 <= bit && bit <= 96);
bit--;
gfxUsageBits[3 * strip + bit / 32] |= (1 << (bit % 32));
}
void Scumm::clearGfxUsageBit(int strip, int bit)
{
gfxUsageBits[3 * strip + bit / 32] &= ~(1 << ((bit - 1) % 32));
assert(1 <= bit && bit <= 96);
bit--;
gfxUsageBits[3 * strip + bit / 32] &= ~(1 << (bit % 32));
}
bool Scumm::testGfxUsageBit(int strip, int bit)
{
return (gfxUsageBits[3 * strip + bit / 32] & (1 << ((bit - 1) % 32))) != 0;
assert(1 <= bit && bit <= 96);
bit--;
return (gfxUsageBits[3 * strip + bit / 32] & (1 << (bit % 32))) != 0;
}
bool Scumm::testGfxAnyUsageBits(int strip)
@ -71,7 +77,9 @@ bool Scumm::testGfxOtherUsageBits(int strip, int bit)
uint32 bitmask[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
int i;
bitmask[bit / 32] &= ~(1 << ((bit - 1) % 32));
assert(1 <= bit && bit <= 96);
bit--;
bitmask[bit / 32] &= ~(1 << (bit % 32));
for (i = 0; i < 3; i++)
if (gfxUsageBits[3 * strip + i] & bitmask[i])