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Merge pull request #38 from gameblabla/off-by-one-fix

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Fixed off-by-1 bugs in window coordinate evaluation, per tip from trap15.
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hizzlekizzle 2019-04-02 18:15:25 -05:00 committed by GitHub
commit b231cff853
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 4 deletions
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8
mednafen/wswan/gfx.cpp
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@ -426,7 +426,7 @@ void wsScanline(uint16 *target)
if(windowtype == 0x20) // Display FG only inside window
{
if((wsLine >= FGy0) && (wsLine < FGy1))
if((wsLine >= FGy0) && (wsLine <= FGy1))
for(j = FGx0; j <= FGx1 && j < 224; j++)
in_window[7 + j] = 1;
}
@ -434,7 +434,7 @@ void wsScanline(uint16 *target)
{
for(j = 0; j < 224; j++)
{
if(!(j >= FGx0 && j < FGx1) || !((wsLine >= FGy0) && (wsLine < FGy1)))
if(!(j >= FGx0 && j <= FGx1) || !((wsLine >= FGy0) && (wsLine < FGy1)))
in_window[7 + j] = 1;
}
}
@ -502,8 +502,8 @@ void wsScanline(uint16 *target)
if(DispControl & 0x08)
{
memset(in_window, 0, sizeof(in_window));
if((wsLine >= SPRy0) && (wsLine < SPRy1))
for(j = SPRx0; j < SPRx1 && j < 256; j++)
if((wsLine >= SPRy0) && (wsLine <= SPRy1))
for(j = SPRx0; j <= SPRx1 && j < 256; j++)
in_window[7 + j] = 1;
}
else