78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
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#include <QDebug>
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#include "t32bitsrv_wrap.h"
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//================================================================================
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int t32bitsrv::BufferExchanger::read(const char *srcBuf, int len) {
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m_data = (UCHAR *)memcpy(m_data, srcBuf, len);
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return len;
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}
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//--------------------------------------------------------------------------------
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int t32bitsrv::BufferExchanger::write(char *dstBuf, int len) {
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memcpy(dstBuf, m_data, len);
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m_data += len;
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return len;
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}
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//================================================================================
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template <typename PIXEL>
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int t32bitsrv::RasterExchanger<PIXEL>::read(const char *srcBuf, int len) {
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if (m_ras->getWrap() == m_ras->getLx()) {
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memcpy(m_pix, srcBuf, len);
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m_pix = (PIXEL *)((UCHAR *)m_pix + len);
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} else {
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int xStart = (m_pix - m_ras->pixels(0)) % m_ras->getWrap();
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int remainingData = len;
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int lineData = m_ras->getLx() * sizeof(PIXEL);
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int lineDataToRead = std::min(
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(int)((m_ras->getLx() - xStart) * sizeof(PIXEL)), remainingData);
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for (; remainingData > 0;
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m_pix += (m_ras->getWrap() - xStart), remainingData -= lineDataToRead,
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lineDataToRead = std::min(lineData, remainingData), xStart = 0)
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memcpy(m_pix, srcBuf, lineDataToRead);
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}
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return len;
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}
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//--------------------------------------------------------------------------------
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template <typename PIXEL>
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int t32bitsrv::RasterExchanger<PIXEL>::write(char *dstBuf, int len) {
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// We pass entire pixels, not just bytes
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len = len - (len % sizeof(PIXEL));
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if (m_ras->getWrap() == m_ras->getLx()) {
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memcpy(dstBuf, m_pix, len);
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m_pix = (PIXEL *)((UCHAR *)m_pix + len);
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} else {
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int xStart = (m_pix - m_ras->pixels(0)) % m_ras->getWrap();
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int remainingData = len;
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int lineData = m_ras->getLx() * sizeof(PIXEL);
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int lineDataToWrite = std::min(
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(int)((m_ras->getLx() - xStart) * sizeof(PIXEL)), remainingData);
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for (; remainingData > 0;
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m_pix += (m_ras->getWrap() - xStart), remainingData -= lineDataToWrite,
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lineDataToWrite = std::min(lineData, remainingData), xStart = 0)
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memcpy(dstBuf, m_pix, lineDataToWrite);
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}
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return len;
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}
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//--------------------------------------------------------------------------------
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// Explicit specialization of raster exchangers
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template class DVAPI t32bitsrv::RasterExchanger<TPixel32>;
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//================================================================================
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