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Factor some functions outside the loop to improve speed.

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Signed-off-by: Andrea Odetti <mariofutire@gmail.com>
This commit is contained in:
Andrea Odetti 2019-11-27 17:41:22 +00:00
parent 9ca7485f52
commit 5ad8fb3e1b
1 changed files with 5 additions and 2 deletions
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7
source/RGBMonitor.cpp
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@ -509,6 +509,9 @@ static void CopyMixedSource(int x, int y, int sx, int sy, bgra_t *pVideoAddress)
// Pre: nSrcAdjustment: for 160-color images, src is +1 compared to dst
static void CopySource(int w, int h, int sx, int sy, bgra_t *pVideoAddress, const int nSrcAdjustment = 0)
{
const bool bIsHalfScanLines = IsVideoStyle(VS_HALF_SCANLINES);
const UINT frameBufferWidth = GetFrameBufferWidth();
UINT32* pDst = (UINT32*) pVideoAddress;
const BYTE* const pSrc = g_aSourceStartofLine[ sy ] + sx;
@ -519,7 +522,7 @@ static void CopySource(int w, int h, int sx, int sy, bgra_t *pVideoAddress, cons
{
--nBytes;
if (IsVideoStyle(VS_HALF_SCANLINES) && !(h & 1))
if (bIsHalfScanLines && !(h & 1))
{
// 50% Half Scan Line clears every odd scanline (and SHIFT+PrintScreen saves only the even rows)
*(pDst+nBytes) = 0;
@ -533,7 +536,7 @@ static void CopySource(int w, int h, int sx, int sy, bgra_t *pVideoAddress, cons
}
}
pDst -= GetFrameBufferWidth();
pDst -= frameBufferWidth;
}
}