janwas
a3967624af
work continues on DDS decode. endian-safe; supports dxt1a; now fairly efficient and cleaned up. This was SVN commit r2751.
67 lines
1007 B
C++
67 lines
1007 B
C++
#include "precompiled.h"
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#include "byte_order.h"
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#include "sdl.h"
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u16 read_le16(const void* p)
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{
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#if SDL_BYTE_ORDER == SDL_BIG_ENDIAN
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const u8* _p = (const u8*)p;
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return (u16)_p[0] | (u16)_p[1] << 8;
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#else
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return *(u16*)p;
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#endif
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}
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u32 read_le32(const void* p)
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{
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#if SDL_BYTE_ORDER == SDL_BIG_ENDIAN
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return SDL_Swap32(*(u32*)p);
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#else
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return *(u32*)p;
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#endif
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}
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u64 read_le64(const void* p)
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{
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#if SDL_BYTE_ORDER == SDL_BIG_ENDIAN
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return SDL_Swap64(*(u64*)p);
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#else
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return *(u64*)p;
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#endif
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}
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u16 read_be16(const void* p)
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{
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#if SDL_BYTE_ORDER == SDL_BIG_ENDIAN
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return *(u16*)p;
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#else
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const u8* _p = (const u8*)p;
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return (u16)_p[0] | (u16)_p[1] << 8;
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#endif
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}
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u32 read_be32(const void* p)
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{
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#if SDL_BYTE_ORDER == SDL_BIG_ENDIAN
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return *(u32*)p;
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#else
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return SDL_Swap32(*(u32*)p);
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#endif
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}
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u64 read_be64(const void* p)
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{
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#if SDL_BYTE_ORDER == SDL_BIG_ENDIAN
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return *(u64*)p;
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#else
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return SDL_Swap64(*(u64*)p);
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#endif
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} |