bool CxImageIG::EncodeLayer (const wchar_t *pcwFilePath, int nLayerIdx, int nLayerPos, RECT *p_rcSubLayer, int nSubLayerOwnerId)
{
CxIOFile file;
if (!file.Open (pcwFilePath, L"r+b"))
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "file.Open failed");
// read current header
IGHEADER igHeader;
if (!decodeHeader (&file, &igHeader))
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "decodeHeader failed");
IGSECTIONHEADER_LAYER *pLayerSections = new IGSECTIONHEADER_LAYER[CXIMAGEIG_MAX_NBLAYERS];
IGSECTIONHEADER_SELECTION *pSelectionSections = new IGSECTIONHEADER_SELECTION[CXIMAGEIG_MAX_NBSELECTIONS];
if (!decodeSections (&file, &igHeader, &pLayerSections[0], &pSelectionSections[0]))
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "decodeSections failed");
IGLibrary::IGLayer *pLayer = GetLayer (nLayerPos);
if (!pLayer)
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "GetLayer failed");
_ASSERTE ((int)pLayer->GetId() == nLayerIdx && "CxImageIG::EncodeLayer FAILED");
bool bIsSubLayerOwner = false;
int nLayerSectionIndex = findLayerSectionIndex (&igHeader, pLayerSections, nLayerIdx, bIsSubLayerOwner);
if (nLayerSectionIndex < 0)
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "findLayerSectionIndex failed");
if ((nLayerSectionIndex > igHeader.nNbLayers) || (nLayerSectionIndex >= CXIMAGEIG_MAX_NBLAYERS))
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "findLayerSectionIndex failed");
CxImage cxSubLayer;
CxImage *pEncodingLayer = pLayer;
int nSubLayerWidth = 0;
int nSubLayerHeight = 0;
if (p_rcSubLayer)
{
// Encode sub-layer
nSubLayerWidth = p_rcSubLayer->right - p_rcSubLayer->left + 1;
nSubLayerHeight = p_rcSubLayer->bottom - p_rcSubLayer->top + 1;
cxSubLayer.Create (nSubLayerWidth, nSubLayerHeight, 24);
cxSubLayer.AlphaCreate (255);
BYTE *pLayerBits = NULL;
BYTE *pSubLayerBits = NULL;
for (int i = 0; i < nSubLayerHeight; i++)
{
pSubLayerBits = cxSubLayer.GetBits (i);
pLayerBits = pLayer->GetBits (p_rcSubLayer->top + i) + 3 * p_rcSubLayer->left;
::memcpy (pSubLayerBits, pLayerBits, nSubLayerWidth * 3);
}
BYTE *pLayerAlpha = NULL;
BYTE *pSubLayerAlpha = NULL;
for (int i = 0; i < nSubLayerHeight; i++)
{
pLayerAlpha = pLayer->AlphaGetPointer (p_rcSubLayer->left, p_rcSubLayer->top + i);
pSubLayerAlpha = cxSubLayer.AlphaGetPointer (0, i);
::memcpy (pSubLayerAlpha, pLayerAlpha, nSubLayerWidth);
}
pEncodingLayer = &cxSubLayer;
int nSubLayerSectionIndex = findLayerSectionIndex (&igHeader, pLayerSections, nSubLayerOwnerId, bIsSubLayerOwner);
if (nSubLayerSectionIndex < 0)
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "findLayerSectionIndex failed");
pLayerSections [nSubLayerSectionIndex].pnSubLayers [pLayerSections [nSubLayerSectionIndex].nSubLayers++] = nLayerSectionIndex;
}
ProgressSetRange (pLayer->GetHeight(), 0);
ProgressSetMessage (L"Encoding layer...");
// fill layer offset and size
pLayerSections [nLayerSectionIndex].nSubLayers = 0;
pLayerSections [nLayerSectionIndex].ptOffset.x = p_rcSubLayer ? p_rcSubLayer->left : pLayer->info.xOffset;
pLayerSections [nLayerSectionIndex].ptOffset.y = p_rcSubLayer ? p_rcSubLayer->top : pLayer->info.yOffset;
pLayerSections [nLayerSectionIndex].ptSize.x = p_rcSubLayer ? p_rcSubLayer->right - p_rcSubLayer->left + 1 : pLayer->GetWidth();
pLayerSections [nLayerSectionIndex].ptSize.y = p_rcSubLayer ? p_rcSubLayer->bottom - p_rcSubLayer->top + 1 : pLayer->GetHeight();
if (nLayerSectionIndex == igHeader.nNbLayers)
pLayerSections [nLayerSectionIndex].commonHeader.nSectionId = (BYTE)igHeader.nNbSections;
pLayerSections [nLayerSectionIndex].commonHeader.nId = nLayerIdx;
pLayerSections [nLayerSectionIndex].commonHeader.eSectionType = IGSECTION_LAYER;
// set byte offset
if (igHeader.nNbSections == 0)
pLayerSections [nLayerSectionIndex].commonHeader.nFirstByteOffset = sizeof (IGHEADER) + sizeof (IGSECTIONHEADER_LAYER) * CXIMAGEIG_MAX_NBLAYERS + sizeof (IGSECTIONHEADER_SELECTION) * CXIMAGEIG_MAX_NBSELECTIONS;
else
pLayerSections [nLayerSectionIndex].commonHeader.nFirstByteOffset = findSectionFirstByteOffset (&igHeader, pLayerSections, pSelectionSections, pLayerSections [nLayerSectionIndex].commonHeader.nSectionId);
igHeader.nNbLayers = nLayerSectionIndex + 1;
if (igHeader.nNbSelections == 0)
{
igHeader.nNbSections = pLayerSections [nLayerSectionIndex].commonHeader.nSectionId + 1;
igHeader.nNbSelections = igHeader.nNbSections - igHeader.nNbLayers;
}
else
{
if (pSelectionSections [igHeader.nNbSelections - 1].commonHeader.nSectionId == pLayerSections [nLayerSectionIndex].commonHeader.nSectionId + 1)
igHeader.nNbSections = igHeader.nNbSelections + igHeader.nNbLayers;
else
{
igHeader.nNbSections = pLayerSections [nLayerSectionIndex].commonHeader.nSectionId + 1;
igHeader.nNbSelections = igHeader.nNbSections - igHeader.nNbLayers;
}
}
// write layer pixels
if (!file.Seek (pLayerSections [nLayerSectionIndex].commonHeader.nFirstByteOffset, SEEK_SET))
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "file.Seek failed");
// set max JPEG quality
float fCurQuality = pEncodingLayer->GetJpegQualityF();
pEncodingLayer->SetJpegQualityF (100.0f);
// JPEG encoding
BYTE *pBuf = new BYTE [CXIMAGEIG_INIT_LAYERSIZE];
CxMemFile memFile (pBuf, CXIMAGEIG_INIT_LAYERSIZE);
if (!pEncodingLayer->Encode (&memFile, CXIMAGEIG_LAYERFORMAT))
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "pEncodingLayer->Encode failed");
BYTE *pBufImg = memFile.GetBuffer();
long nSizeBufImg = memFile.Tell();
// reset JPEG quality
pEncodingLayer->SetJpegQualityF (fCurQuality);
file.Write (pBufImg, nSizeBufImg, 1);
delete [] pBufImg;
pLayerSections [nLayerSectionIndex].commonHeader.nSizeBuf = nSizeBufImg;
// write layer alpha
if (!pEncodingLayer->pAlpha)
pEncodingLayer->AlphaCreate(255);
int nNbPixels = pEncodingLayer->GetWidth() * pEncodingLayer->GetHeight();
file.Write (pEncodingLayer->pAlpha, nNbPixels, 1);
pLayerSections [nLayerSectionIndex].commonHeader.nEndByteOffset = pLayerSections [nLayerSectionIndex].commonHeader.nFirstByteOffset + nSizeBufImg + nNbPixels;
// write new headers
if (!encodeHeader (&file, &igHeader))
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "encodeHeader failed");
if (!encodeSections (&file, &igHeader, pLayerSections, pSelectionSections))
throw IGEXCEPTION (CxImageIGException, "EncodeLayer", "encodeSections failed");
delete [] pLayerSections;
delete [] pSelectionSections;
return true;
}
