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AWJ`s version of my k053936 heap-corruption fix

This commit is contained in:
dinkc64 2014-12-17 07:18:31 +00:00
parent 1e3421f187
commit 2dee5075b0
1 changed files with 6 additions and 32 deletions
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38
src/burn/drv/konami/k053936.cpp
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@ -485,7 +485,7 @@ static inline void K053936GP_copyroz32clip(INT32 chip, UINT16 *src_bitmap, INT32
if (blend > 0)
{
dst_base += dst_pitch; // draw blended
dst_ptr += dst_pitch; // draw blended
starty += incyy;
startx += incyx;
@ -510,12 +510,12 @@ static inline void K053936GP_copyroz32clip(INT32 chip, UINT16 *src_bitmap, INT32
if (!(pixel & cmask))
continue;
// this one below is fucked.
if ((dst_ptr+ecx+dst_base2+dst_pitch)<dst_size) dst_base[dst_ptr+ecx+dst_base2] = alpha_blend(pal_base[pixel], dst_base[dst_ptr+ecx+dst_base2], alpha);
if ((dst_ptr+ecx+dst_base2)<dst_size) dst_base[dst_ptr+ecx+dst_base2] = alpha_blend(pal_base[pixel], dst_base[dst_ptr+ecx+dst_base2], alpha);
if (pixeldouble_output)
{
ecx++;
if ((dst_ptr+ecx+dst_base2+dst_pitch)<dst_size) dst_base[dst_ptr+ecx+dst_base2] = alpha_blend(pal_base[pixel], dst_base[dst_ptr+ecx+dst_base2], alpha);
if ((dst_ptr+ecx+dst_base2)<dst_size) dst_base[dst_ptr+ecx+dst_base2] = alpha_blend(pal_base[pixel], dst_base[dst_ptr+ecx+dst_base2], alpha);
}
}
while (++ecx < 0);
@ -528,35 +528,9 @@ static inline void K053936GP_copyroz32clip(INT32 chip, UINT16 *src_bitmap, INT32
}
else // draw solid
{
if (blend == 0)
{
dst_ptr += dst_pitch;
starty += incyy;
startx += incyx;
}
else
{
if ((sy & 1) ^ (blend & 1))
{
if (ty <= 1) return;
dst_ptr += dst_pitch;
cy += incyy;
cx += incyx;
}
if (ty > 1)
{
ty >>= 1;
dst_pitch <<= 1;
incyy <<= 1;
incyx <<= 1;
dst_ptr += dst_pitch;
starty = cy + incyy;
startx = cx + incyx;
}
}
dst_ptr += dst_pitch;
starty += incyy;
startx += incyx;
do {
do {