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Video Filters: 

- Fix out-of-bounds memory reads on HQ4x and HQ4xS filters that might cause a crash.
This commit is contained in:
rogerman 2013-01-02 02:58:27 +00:00
parent b3fa10446a
commit 1c08348f4d
1 changed files with 51 additions and 15 deletions
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66
desmume/src/filter/hq4x.cpp
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@ -49,18 +49,36 @@ void hq4x_32_def(u32* dst0, u32* dst1, u32* dst2, u32* dst3,
unsigned char mask;
u32 c[9];
c[1] = src0[0];
c[4] = src1[0];
c[7] = src2[0];
c[0] = src0[-1];
c[3] = src1[-1];
c[6] = src2[-1];
c[2] = src0[1];
c[5] = src1[1];
c[8] = src2[1];
if (i > 0)
{
c[0] = src0[-1];
c[3] = src1[-1];
c[6] = src2[-1];
}
else
{
c[0] = src0[0];
c[3] = src1[0];
c[6] = src2[0];
}
if (i < count-1)
{
c[2] = src0[1];
c[5] = src1[1];
c[8] = src2[1];
}
else
{
c[2] = src0[0];
c[5] = src1[0];
c[8] = src2[0];
}
mask = 0;
@ -128,13 +146,31 @@ void hq4xS_32_def(u32* dst0, u32* dst1, u32* dst2, u32* dst3,
c[4] = src1[0];
c[7] = src2[0];
c[0] = src0[-1];
c[3] = src1[-1];
c[6] = src2[-1];
if (i > 0)
{
c[0] = src0[-1];
c[3] = src1[-1];
c[6] = src2[-1];
}
else
{
c[0] = src0[0];
c[3] = src1[0];
c[6] = src2[0];
}
c[2] = src0[1];
c[5] = src1[1];
c[8] = src2[1];
if (i < count-1)
{
c[2] = src0[1];
c[5] = src1[1];
c[8] = src2[1];
}
else
{
c[2] = src0[0];
c[5] = src1[0];
c[8] = src2[0];
}
mask = 0;
// hq4xS dynamic edge detection: