bool CxImage::SelectionFlip()
{
if (!pSelection) return false;
BYTE *buff = (BYTE*)cxalloc(head.biWidth);//malloc(head.biWidth);
if (!buff) return false;
BYTE *iSrc,*iDst;
iSrc = pSelection + (head.biHeight-1)*head.biWidth;
iDst = pSelection;
for (long i=0; i<(head.biHeight/2); ++i)
{
memcpy(buff, iSrc, head.biWidth);
memcpy(iSrc, iDst, head.biWidth);
memcpy(iDst, buff, head.biWidth);
iSrc-=head.biWidth;
iDst+=head.biWidth;
}
cxfree(buff);//free(buff);
long top = info.rSelectionBox.top;
info.rSelectionBox.top = head.biHeight - info.rSelectionBox.bottom;
info.rSelectionBox.bottom = head.biHeight - top;
return true;
}
/**
* Creates the selection channel from a gray scale image.
* black = unselected
*/
bool CxImage::SelectionSet(CxImage &from)
{
if (!from.IsGrayScale() || head.biWidth != from.head.biWidth || head.biHeight != from.head.biHeight){
strcpy(info.szLastError,"CxImage::SelectionSet: wrong width or height, or image is not gray scale");
return false;
}
if (pSelection==NULL) pSelection = (BYTE*)cxalloc(head.biWidth * head.biHeight);//malloc(head.biWidth * head.biHeight);
BYTE* src = from.info.pImage;
BYTE* dst = pSelection;
if (src==NULL || dst==NULL){
strcpy(info.szLastError,"CxImage::SelectionSet: null pointer");
return false;
}
for (long y=0; y<head.biHeight; y++){
memcpy(dst,src,head.biWidth);
dst += head.biWidth;
src += from.info.dwEffWidth;
}
SelectionRebuildBox();
return true;
}
/**
* Allocates an empty (opaque) alpha channel.
*/
bool CxImage::AlphaCreate()
{
if (pAlpha==NULL) {
pAlpha = (BYTE*)cxalloc(head.biWidth * head.biHeight);//malloc(head.biWidth * head.biHeight);
if (pAlpha) memset(pAlpha,255,head.biWidth * head.biHeight);
}
return (pAlpha!=0);
}
/**
* Imports an existing alpa channel from another image with the same width and height.
*/
bool CxImage::AlphaCopy(CxImage &from)
{
if (from.pAlpha == NULL || head.biWidth != from.head.biWidth || head.biHeight != from.head.biHeight) return false;
if (pAlpha==NULL) pAlpha = (BYTE*)cxalloc(head.biWidth * head.biHeight);//malloc(head.biWidth * head.biHeight);
if (pAlpha==NULL) return false;
memcpy(pAlpha,from.pAlpha,head.biWidth * head.biHeight);
info.nAlphaMax=from.info.nAlphaMax;
return true;
}
/**
* Imports an existing region from another image with the same width and height.
*/
bool CxImage::SelectionCopy(CxImage &from)
{
if (from.pSelection == NULL || head.biWidth != from.head.biWidth || head.biHeight != from.head.biHeight) return false;
if (pSelection==NULL) pSelection = (BYTE*)cxalloc(head.biWidth * head.biHeight);//malloc(head.biWidth * head.biHeight);
if (pSelection==NULL) return false;
memcpy(pSelection,from.pSelection,head.biWidth * head.biHeight);
memcpy(&info.rSelectionBox,&from.info.rSelectionBox,sizeof(RECT));
return true;
}
/**
* Creates the alpha channel from a gray scale image.
*/
bool CxImage::AlphaSet(CxImage &from)
{
if (!from.IsGrayScale() || head.biWidth != from.head.biWidth || head.biHeight != from.head.biHeight) return false;
if (pAlpha==NULL) pAlpha = (BYTE*)cxalloc(head.biWidth * head.biHeight);//malloc(head.biWidth * head.biHeight);
BYTE* src = from.info.pImage;
BYTE* dst = pAlpha;
if (src==NULL || dst==NULL) return false;
for (long y=0; y<head.biHeight; y++){
memcpy(dst,src,head.biWidth);
dst += head.biWidth;
src += from.info.dwEffWidth;
}
return true;
}
bool CxImage::SelectionMirror()
{
if (!pSelection) return false;
BYTE* pSelection2 = (BYTE*)cxalloc(head.biWidth * head.biHeight);//malloc(head.biWidth * head.biHeight);
if (!pSelection2) return false;
BYTE *iSrc,*iDst;
long wdt=head.biWidth-1;
iSrc=pSelection + wdt;
iDst=pSelection2;
for(long y=0; y < head.biHeight; y++){
for(long x=0; x <= wdt; x++)
*(iDst+x)=*(iSrc-x);
iSrc+=head.biWidth;
iDst+=head.biWidth;
}
cxfree(pSelection);//free(pSelection);
pSelection=pSelection2;
long left = info.rSelectionBox.left;
info.rSelectionBox.left = head.biWidth - info.rSelectionBox.right;
info.rSelectionBox.right = head.biWidth - left;
return true;
}
bool CxImageJPG::CxExifInfo::DecodeExif(CxFile * hFile, int nReadMode)
{
int a;
int HaveCom = FALSE;
a = hFile->GetC();
if (a != 0xff || hFile->GetC() != M_SOI){
return FALSE;
}
for(;;){
int itemlen;
int marker = 0;
int ll,lh, got;
BYTE * Data;
if (SectionsRead >= MAX_SECTIONS){
strcpy(m_szLastError,"Too many sections in jpg file");
return false;
}
for (a=0;a<7;a++){
marker = hFile->GetC();
if (marker != 0xff) break;
if (a >= 6){
printf("too many padding bytes\n");
return false;
}
}
if (marker == 0xff){
// 0xff is legal padding, but if we get that many, something's wrong.
strcpy(m_szLastError,"too many padding bytes!");
return false;
}
Sections[SectionsRead].Type = marker;
// Read the length of the section.
lh = hFile->GetC();
ll = hFile->GetC();
itemlen = (lh << 8) | ll;
if (itemlen < 2){
strcpy(m_szLastError,"invalid marker");
return false;
}
Sections[SectionsRead].Size = itemlen;
Data = (BYTE *)cxalloc(itemlen);//malloc(itemlen);
if (Data == NULL){
strcpy(m_szLastError,"Could not allocate memory");
return false;
}
Sections[SectionsRead].Data = Data;
// Store first two pre-read bytes.
Data[0] = (BYTE)lh;
Data[1] = (BYTE)ll;
got = hFile->Read(Data+2, 1, itemlen-2); // Read the whole section.
if (got != itemlen-2){
strcpy(m_szLastError,"Premature end of file?");
return false;
}
SectionsRead += 1;
switch(marker){
case M_SOS: // stop before hitting compressed data
// If reading entire image is requested, read the rest of the data.
if (nReadMode & EXIF_READ_IMAGE){
int cp, ep, size;
// Determine how much file is left.
cp = hFile->Tell();
hFile->Seek(0, SEEK_END);
ep = hFile->Tell();
hFile->Seek(cp, SEEK_SET);
size = ep-cp;
Data = (BYTE *)cxalloc(size);//malloc(size);
if (Data == NULL){
strcpy(m_szLastError,"could not allocate data for entire image");
return false;
}
got = hFile->Read(Data, 1, size);
if (got != size){
strcpy(m_szLastError,"could not read the rest of the image");
return false;
}
Sections[SectionsRead].Data = Data;
Sections[SectionsRead].Size = size;
Sections[SectionsRead].Type = PSEUDO_IMAGE_MARKER;
SectionsRead ++;
}
return true;
case M_EOI: // in case it's a tables-only JPEG stream
printf("No image in jpeg!\n");
return FALSE;
case M_COM: // Comment section
if (HaveCom || ((nReadMode & EXIF_READ_EXIF) == 0)){
// Discard this section.
cxfree(Sections[--SectionsRead].Data);//free(Sections[--SectionsRead].Data);
Sections[SectionsRead].Data=0;
}else{
process_COM(Data, itemlen);
HaveCom = TRUE;
}
break;
case M_JFIF:
// Regular jpegs always have this tag, exif images have the exif
// marker instead, althogh ACDsee will write images with both markers.
// this program will re-create this marker on absence of exif marker.
// hence no need to keep the copy from the file.
cxfree(Sections[--SectionsRead].Data);//free(Sections[--SectionsRead].Data);
Sections[SectionsRead].Data=0;
break;
case M_EXIF:
// Seen files from some 'U-lead' software with Vivitar scanner
// that uses marker 31 for non exif stuff. Thus make sure
// it says 'Exif' in the section before treating it as exif.
if ((nReadMode & EXIF_READ_EXIF) && memcmp(Data+2, "Exif", 4) == 0){
m_exifinfo->IsExif = process_EXIF((BYTE *)Data+2, itemlen);
}else{
// Discard this section.
cxfree(Sections[--SectionsRead].Data);//free(Sections[--SectionsRead].Data);
Sections[SectionsRead].Data=0;
}
break;
case M_SOF0:
case M_SOF1:
case M_SOF2:
case M_SOF3:
case M_SOF5:
case M_SOF6:
case M_SOF7:
case M_SOF9:
case M_SOF10:
case M_SOF11:
case M_SOF13:
case M_SOF14:
case M_SOF15:
process_SOFn(Data, marker);
break;
default:
// Skip any other sections.
//if (ShowTags) printf("Jpeg section marker 0x%02x size %d\n",marker, itemlen);
break;
}
}
return true;
}
jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
{
return (void FAR *) cxalloc(sizeofobject);//malloc(sizeofobject);
}
jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
{
return (void *) cxalloc(sizeofobject);//malloc(sizeofobject);
}
