73 lines
1.5 KiB
C++
73 lines
1.5 KiB
C++
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// File: crn_utils.cpp
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#include "crn_core.h"
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#include "crn_utils.h"
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namespace crnlib
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{
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namespace utils
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{
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void endian_switch_words(uint16* p, uint num)
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{
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uint16* p_end = p + num;
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while (p != p_end)
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{
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uint16 k = *p;
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*p++ = swap16(k);
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}
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}
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void endian_switch_dwords(uint32* p, uint num)
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{
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uint32* p_end = p + num;
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while (p != p_end)
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{
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uint32 k = *p;
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*p++ = swap32(k);
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}
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}
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void copy_words(uint16* pDst, const uint16* pSrc, uint num, bool endian_switch)
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{
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if (!endian_switch)
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memcpy(pDst, pSrc, num << 1U);
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else
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{
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uint16* pDst_end = pDst + num;
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while (pDst != pDst_end)
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*pDst++ = swap16(*pSrc++);
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}
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}
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void copy_dwords(uint32* pDst, const uint32* pSrc, uint num, bool endian_switch)
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{
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if (!endian_switch)
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memcpy(pDst, pSrc, num << 2U);
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else
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{
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uint32* pDst_end = pDst + num;
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while (pDst != pDst_end)
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*pDst++ = swap32(*pSrc++);
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}
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}
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uint compute_max_mips(uint width, uint height)
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{
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if ((width | height) == 0)
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return 0;
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uint num_mips = 1;
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while ((width > 1U) || (height > 1U))
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{
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width >>= 1U;
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height >>= 1U;
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num_mips++;
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}
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return num_mips;
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}
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} // namespace utils
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} // namespace crnlib
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