// endian-swapping fread that dies if the expected amount cannot be read
size_t efread( void *buffer, size_t size, size_t num, FILE *stream )
{
size_t num_read = fread(buffer, size, num, stream);
switch (size)
{
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
case 2:
for (size_t i = 0; i < num; i++)
((Uint16 *)buffer)[i] = SDL_Swap16(((Uint16 *)buffer)[i]);
break;
case 4:
for (size_t i = 0; i < num; i++)
((Uint32 *)buffer)[i] = SDL_Swap32(((Uint32 *)buffer)[i]);
break;
case 8:
for (size_t i = 0; i < num; i++)
((Uint64 *)buffer)[i] = SDL_Swap64(((Uint64 *)buffer)[i]);
break;
#endif
default:
break;
}
if (num_read != num)
{
fprintf(stderr, "error: An unexpected problem occurred while reading from a file.\n");
JE_tyrianHalt(1);
}
return num_read;
}
/**
* Optimized 8 bit zoomer for resizing by a factor of 4. Doesn't flip.
* Used internally by _zoomSurfaceY() below.
* source and dest. widths must be multiples of 8 bytes for 64-bit access
*/
static int zoomSurface4X_64bit(SDL_Surface *src, SDL_Surface *dst)
{
Uint64 dataSrc;
Uint64 dataDst;
Uint8 *pixelSrc = (Uint8*)src->pixels;
Uint8 *pixelDstRow = (Uint8*)dst->pixels;
int sx, sy;
static bool proclaimed = false;
if (!proclaimed)
{
proclaimed = true;
Log(LOG_INFO) << "Using modestly fast 4X zoom routine.";
}
for (sy = 0; sy < src->h; ++sy, pixelDstRow += dst->pitch*4)
{
Uint8 *pixelDst = pixelDstRow;
for (sx = 0; sx < src->w; sx += 8, pixelSrc += 8)
{
dataSrc = *((Uint64*) pixelSrc);
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
// boo
SDL_Swap64(dataSrc);
#endif
/* expanded form of of data shift:
dataDst = (dataSrc & 0xFF) | ((dataSrc & 0xFF) << 8) |
((dataSrc & 0xFF) << 16 | ((datasrc & 0xFF) << 24) |
((dataSrc & 0xFF00 ) << 24) | ((dataSrc & 0xFF00) << 32) |
((dataSrc & 0xFF00 ) << 40) | ((dataSrc & 0xFF00) << 48) ;
*/
for (int i = 0; i < 4; ++i)
{
// compact form, combining terms with equal multipliers (shifts)
dataDst = (dataSrc & 0xFF) | ((dataSrc & 0xFF) << 8) |
((dataSrc & 0xFF) << 16) |
((dataSrc & 0xFFFF ) << 24) | ((dataSrc & 0xFF00) << 32) |
((dataSrc & 0xFF00 ) << 40) | ((dataSrc & 0xFF00) << 48) ;
*((Uint64*)pixelDst) = dataDst;
*((Uint64*)(pixelDst + dst->pitch)) = dataDst;
*((Uint64*)(pixelDst + dst->pitch*2)) = dataDst;
*((Uint64*)(pixelDst + dst->pitch*3)) = dataDst;
pixelDst+=8; // forward 8 bytes!
dataSrc >>= 16;
}
}
}
return 0;
}
int64_t MessageIn::readInt64(const char *const str)
{
int64_t value = -1;
if (mPos + 8 <= mLength)
{
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
int64_t swap;
memcpy(&swap, mData + static_cast<size_t>(mPos), sizeof(int64_t));
value = SDL_Swap64(swap);
#else
memcpy(&value, mData + static_cast<size_t>(mPos), sizeof(int64_t));
#endif
}
DEBUGLOG2("readInt64: " + toStringPrint(static_cast<unsigned int>(value)),
mPos, str);
mPos += 8;
PacketCounters::incInBytes(8);
return value;
}
int64_t MessageIn::readInt64(const char *const str)
{
int64_t value = -1;
if (mPos + 8 <= mLength)
{
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
int64_t swap;
memcpy(&swap, mData + CAST_SIZE(mPos), sizeof(int64_t));
value = SDL_Swap64(swap);
#else // SDL_BYTEORDER == SDL_BIG_ENDIAN
memcpy(&value, mData + CAST_SIZE(mPos), sizeof(int64_t));
#endif // SDL_BYTEORDER == SDL_BIG_ENDIAN
}
DEBUGLOG2("readInt64: " + toStringPrint(CAST_U32(value)),
mPos, str);
mPos += 8;
PacketCounters::incInBytes(8);
return value;
}
// endian-swapping fread
size_t efread( void *buffer, size_t size, size_t num, FILE *stream )
{
size_t f = fread(buffer, size, num, stream);
switch (size)
{
case 2:
for (size_t i = 0; i < num; i++)
((Uint16 *)buffer)[i] = SDL_Swap16(((Uint16 *)buffer)[i]);
break;
case 4:
for (size_t i = 0; i < num; i++)
((Uint32 *)buffer)[i] = SDL_Swap32(((Uint32 *)buffer)[i]);
break;
case 8:
for (size_t i = 0; i < num; i++)
((Uint64 *)buffer)[i] = SDL_Swap64(((Uint64 *)buffer)[i]);
break;
default:
break;
}
return f;
}
