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use unique values as fingerprint

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this works much better
But sometimes Zelda writes values not only under but also over the
fingerprint, Link's model is lost again
This commit is contained in:
purplemarshmallow 2015-07-21 17:26:35 +02:00 committed by Sergey Lipskiy
parent e617177958
commit e0face5f86
2 changed files with 11 additions and 9 deletions
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18
src/FrameBuffer.cpp
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@ -265,11 +265,13 @@ void FrameBuffer::copyRdram()
// Thus content of RDRAM on moment of buffer creation will be the same as when buffer becomes obsolete.
// Validity check will see that the RDRAM is the same and thus the buffer is valid, which is false.
// It can be enough to write data just little more than treshold level, but more safe to write twice as much in case that some values in buffer match our fingerprint.
const u32 twoPercent = dataSize / 200;
u32 start = m_startAddress >> 2;
u32 * pData = (u32*)RDRAM;
for (u32 i = 0; i < twoPercent; ++i)
pData[start++] = m_fillcolor;
//if (dataSize > ) {
//todo: make sure buffer is bigger than the fingerprint
u32 start = m_startAddress >> 2;
u32 * pData = (u32*)RDRAM;
for (u32 i = 0; i < 4; ++i)
pData[start++] = fingerprint[i];
//}
}
}
@ -301,11 +303,9 @@ bool FrameBuffer::isValid() const
const u32 stride = m_width << m_size >> 1;
const u32 height = _cutHeight(m_startAddress, m_height, stride);
const u32 dataSize = stride * height;
const u32 color = m_fillcolor & 0xFFFEFFFE;
const u32 twoPercent = dataSize / 200;;
u32 start = m_startAddress >> 2;
for (u32 i = 0; i < twoPercent; ++i)
if ((pData[start++] & 0xFFFEFFFE) != color)
for (u32 i = 0; i < 4; ++i)
if ((pData[start++] & 0xFFFEFFFE) != (fingerprint[i] & 0xFFFEFFFE))
return false;
return true;
}

2
src/FrameBuffer.h
View File

@ -9,6 +9,8 @@
struct gDPTile;
struct DepthBuffer;
const int fingerprint[4] = { 2, 6, 4, 3 };
struct FrameBuffer
{
FrameBuffer();