//*******************************************************************************
// Decompress RGB24 RLE
//
BOOL DecompressRGB24RLE(FILE *pFile, TGAHEADER *pHeader, IMAGE_DATA *pContext)
{
unsigned int u32Stride, i, j, u32PixelDepth;
unsigned char *pu8Src1, *pu8Src2;
//--- Allocate image buffer
pContext->pu8Pixels = new unsigned char[3*pContext->u32Width*pContext->u32Height];
pContext->PixelFormat = PIXELFORMAT_R8G8B8;
u32PixelDepth = 3;
if (!pContext->pu8Pixels)
return(FALSE);
//--- RLE decompression from file
RLEDecompress(pContext->pu8Pixels, pFile, pContext->u32Width*pContext->u32Height, u32PixelDepth);
//--- Swap bytes and image to get proper format
u32Stride = pContext->u32Width*u32PixelDepth;
for (j=0; j<pContext->u32Height>>1; ++j)
{
pu8Src1 = pContext->pu8Pixels + j*u32Stride;
pu8Src2 = pContext->pu8Pixels + (pContext->u32Height-1-j)*u32Stride;
for (i=0; i<pContext->u32Width*u32PixelDepth; i+=u32PixelDepth)
{
pu8Src1[i] ^= pu8Src2[i+2];
pu8Src2[i+2] ^= pu8Src1[i];
pu8Src1[i] ^= pu8Src2[i+2];
}
}
//--- Flip image
if (pContext->u32Height & 1)
{
j = (pContext->u32Height>>1)+1;
pu8Src1 = pContext->pu8Pixels + j*u32Stride;
pu8Src2 = pContext->pu8Pixels + (pContext->u32Height-1-j)*u32Stride;
for (i=0; i<pContext->u32Width*u32PixelDepth; i+=u32PixelDepth)
{
pu8Src1[i] ^= pu8Src2[i+2];
pu8Src2[i+2] ^= pu8Src1[i];
pu8Src1[i] ^= pu8Src2[i+2];
}
}
bool
IMI::FlashRead(Port &port, void *buffer, unsigned address, unsigned size)
{
if (!_connected)
return false;
if (size == 0)
return true;
const TMsg *pMsg = SendRet(port, MSG_FLASH, 0, 0, MSG_FLASH, -1,
IMICOMM_BIGPARAM1(address),
IMICOMM_BIGPARAM2(address),
size, 300, 2);
if (pMsg == NULL || size != pMsg->parameter3)
return false;
return RLEDecompress((IMIBYTE*)buffer, pMsg->payload, pMsg->payloadSize, size);
}
//*******************************************************************************
// Decompress RGB16 RLE
//
BOOL DecompressRGB16RLE(FILE *pFile, TGAHEADER *pHeader, IMAGE_DATA *pContext)
{
unsigned int u32Stride, i, j, k;
unsigned short *pu16RLEBuffer;
unsigned char *pu8Ptr;
//--- Check alpha channel
if (pHeader->cImageDescriptor & 0xF)
{
//--- Allocate image buffer
pContext->pu8Pixels = new unsigned char[4*pContext->u32Width*pContext->u32Height];
pContext->PixelFormat = PIXELFORMAT_R8G8B8A8;
u32Stride = pContext->u32Width*4;
}
else
{
//--- Allocate image buffer
pContext->pu8Pixels = new unsigned char[3*pContext->u32Width*pContext->u32Height];
pContext->PixelFormat = PIXELFORMAT_R8G8B8;
u32Stride = pContext->u32Width*3;
}
if (!pContext->pu8Pixels)
return(FALSE);
//--- Allocate decompression buffer
pu16RLEBuffer = new unsigned short[pContext->u32Width*pContext->u32Height];
if (!pu16RLEBuffer)
{
delete [] pContext->pu8Pixels;
pContext->pu8Pixels = NULL;
return(FALSE);
}
//--- Decompress data
RLEDecompress((unsigned char *)pu16RLEBuffer, pFile, pContext->u32Width*pContext->u32Height, 2);
//--- Reformat data
for (j=0; j<pContext->u32Height; ++j)
{
pu8Ptr = pContext->pu8Pixels + (pContext->u32Height-1-j)*u32Stride;
for (i=0; i<pContext->u32Width; ++i)
{
k = i*j;
*(pu8Ptr++) = (unsigned char)((((pu16RLEBuffer[k] & 0x7C00)>>10)*255)/31);
*(pu8Ptr++) = (unsigned char)((((pu16RLEBuffer[k] & 0x3E0)>>5)*255)/31);
*(pu8Ptr++) = (unsigned char)(((pu16RLEBuffer[k] & 0x1F)*255)/31);
if (pHeader->cImageDescriptor & 0xF)
*(pu8Ptr++) = ((pu16RLEBuffer[k] & 0x8000) == 0x8000)?255:0;
}
}
//--- Destroy work buffer
delete [] pu16RLEBuffer;
return(TRUE);
}
