48 lines
1 KiB
C++
48 lines
1 KiB
C++
// This code is in the public domain -- castanyo@yahoo.es
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#pragma once
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#ifndef NV_IMAGE_H
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#define NV_IMAGE_H
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#include "nvcore/nvcore.h"
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#include "nvcore/Debug.h" // nvDebugCheck
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#include "nvcore/Utils.h" // isPowerOfTwo
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// Function linkage
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#if NVIMAGE_SHARED
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#ifdef NVIMAGE_EXPORTS
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#define NVIMAGE_API DLL_EXPORT
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#define NVIMAGE_CLASS DLL_EXPORT_CLASS
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#else
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#define NVIMAGE_API DLL_IMPORT
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#define NVIMAGE_CLASS DLL_IMPORT
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#endif
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#else
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#define NVIMAGE_API
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#define NVIMAGE_CLASS
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#endif
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namespace nv {
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// Some utility functions:
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inline uint computeBitPitch(uint w, uint bitsize, uint alignmentInBits)
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{
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nvDebugCheck(isPowerOfTwo(alignmentInBits));
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return ((w * bitsize + alignmentInBits - 1) / alignmentInBits) * alignmentInBits;
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}
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inline uint computeBytePitch(uint w, uint bitsize, uint alignmentInBytes)
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{
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uint pitch = computeBitPitch(w, bitsize, 8*alignmentInBytes);
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nvDebugCheck((pitch & 7) == 0);
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return (pitch + 7) / 8;
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}
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} // nv namespace
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#endif // NV_IMAGE_H
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