Function CopySource

source/RGBMonitor.cpp:556–583

Pre: nSrcAdjustment: for 160-color images, src is +1 compared to dst

// 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)
{
	UINT32* pDst = (UINT32*) pVideoAddress;
	const BYTE* const pSrc = g_aSourceStartofLine[ sy ] + sx;

	const bool bIsHalfScanLines = GetVideo().IsVideoStyle(VS_HALF_SCANLINES);
	const UINT frameBufferWidth = GetVideo().GetFrameBufferWidth();

	while (h--)
	{
		if (bIsHalfScanLines && !(h & 1))
		{
			// 50% Half Scan Line clears every odd scanline (and SHIFT+PrintScreen saves only the even rows)
			std::fill(pDst, pDst + w, OPAQUE_BLACK);
		}
		else
		{
			for (int nBytes=0; nBytes<w; ++nBytes)
			{
				_ASSERT( *(pSrc+nBytes+nSrcAdjustment) < (sizeof(PaletteRGB_NTSC)/sizeof(PaletteRGB_NTSC[0])) );
				const RGBQUAD& rRGB = g_pPaletteRGB[ *(pSrc+nBytes+nSrcAdjustment) ];
				*(pDst+nBytes) = *reinterpret_cast<const UINT32 *>(&rRGB);
			}
		}

		pDst -= frameBufferWidth;
	}
}

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