/**
* 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 = (uint8_t*)malloc(head.biWidth * head.biHeight);
uint8_t* src = from.info.pImage;
uint8_t* dst = pSelection;
if (src==NULL || dst==NULL){
strcpy(info.szLastError,"CxImage::SelectionSet: null pointer");
return false;
}
for (int32_t y=0; y<head.biHeight; y++){
memcpy(dst,src,head.biWidth);
dst += head.biWidth;
src += from.info.dwEffWidth;
}
SelectionRebuildBox();
return true;
}
/**
* Inverts the selection.
* Note: the SelectionBox is set to "full image", call SelectionGetBox before (if necessary)
*/
bool CxImage::SelectionInvert()
{
if (pSelection) {
uint8_t *iSrc=pSelection;
int32_t n=head.biHeight*head.biWidth;
for(int32_t i=0; i < n; i++){
*iSrc=(uint8_t)~(*(iSrc));
iSrc++;
}
SelectionRebuildBox();
return true;
}
return false;
}
/**
* Inverts the selection.
* Note: the SelectionBox is set to "full image", call SelectionGetBox before (if necessary)
*/
bool CxImage::SelectionInvert()
{
if (pSelection) {
BYTE *iSrc=pSelection;
long n=head.biHeight*head.biWidth;
for(long i=0; i < n; i++){
*iSrc=(BYTE)~(*(iSrc));
iSrc++;
}
SelectionRebuildBox();
return true;
}
return false;
}
