FgImg4UC
fgLoadImg4UC(const FgString & fname)
{
FgImg4UC ret;
if (!fgFileReadable(fname))
fgThrow("Unable to read file",fname);
fgEnsureMagick();
FgScopePtr<ExceptionInfo> exception(AcquireExceptionInfo(),DestroyExceptionInfo);
FgScopePtr<ImageInfo> image_info(CloneImageInfo(0),DestroyImageInfo);
(void) strcpy(image_info->filename,fname.as_utf8_string().c_str());
// TODO: Do we need to convert into a specific colourspace?
Image *imgPtr = ReadImage(image_info.get(),exception.get());
if (imgPtr == 0)
// exception.description is NULL
fgThrow("Unable to read image file",fname + ": " + exception->reason);
FgScopeGuard sg0(boost::bind(DestroyImage,imgPtr));
FgScopePtr<CacheView> view(AcquireCacheView(imgPtr),DestroyCacheView);
ret.resize(uint(imgPtr->columns),uint(imgPtr->rows));
for(uint row= 0; row < imgPtr->rows; ++row) {
for(uint column = 0; column < imgPtr->columns; ++column) {
PixelPacket pixel;
FGASSERT(MagickTrue ==
GetOneCacheViewAuthenticPixel(view.get(),column,row,&pixel,exception.get()));
ret.elem(column,row)[0] = uchar(pixel.red);
ret.elem(column,row)[1] = uchar(pixel.green);
ret.elem(column,row)[2] = uchar(pixel.blue);
ret.elem(column,row)[3] = 255 - uchar(pixel.opacity);
}
}
return ret;
}
void
fgLoadImgAnyFormat(
const FgString & fname,
FgImgF & img)
{
if (!fgFileReadable(fname))
fgThrow("Unable to read file",fname);
fgEnsureMagick();
FgScopePtr<ExceptionInfo> exception(AcquireExceptionInfo(),DestroyExceptionInfo);
FgScopePtr<ImageInfo> image_info(CloneImageInfo(0),DestroyImageInfo);
(void) strcpy(image_info->filename,fname.as_utf8_string().c_str());
// TODO: Do we need to convert into a specific colourspace?
Image *imgPtr = ReadImage(image_info.get(),exception.get());
if (imgPtr == 0)
// exception.description is NULL
fgThrow("Unable to read image file",fname + ": " + exception->reason);
FgScopeGuard sg0(boost::bind(DestroyImage,imgPtr));
FgScopePtr<CacheView> view(AcquireCacheView(imgPtr),DestroyCacheView);
img.resize(uint(imgPtr->columns),uint(imgPtr->rows));
for(uint row = 0; row < imgPtr->rows; ++row) {
for(uint column = 0; column < imgPtr->columns; ++column) {
PixelPacket pixel;
FGASSERT(MagickTrue ==
GetOneCacheViewAuthenticPixel(view.get(),column,row,&pixel,exception.get()));
img.elem(column,row) = pixel.red; // All channels same value if single-channel read
}
}
}
void
fgRemoveFile(const FgString & fname)
{
string utf8 = fname.as_utf8_string();
if (remove(utf8.c_str()) != 0)
fgThrow("Unable to remove file",fname);
}
void
fgSaveImgAnyFormat(
const FgString & fname,
const FgImgRgbaUb & img)
{
FGASSERT(fname.length() > 0);
fgEnsureMagick();
FgScopePtr<ImageInfo> image_info(CloneImageInfo(0),DestroyImageInfo);
FgScopePtr<ExceptionInfo> exception(AcquireExceptionInfo(),DestroyExceptionInfo);
FgScopePtr<Image> image(ConstituteImage(img.width(),img.height(),"RGBA",
CharPixel,
img.dataPtr(),
exception.get()),
DestroyImage);
(void) strcpy(image_info->filename,fname.as_utf8_string().c_str());
FGASSERT(
MagickTrue ==
WriteImages(image_info.get(),image.get(),fname.as_utf8_string().c_str(),exception.get()));
}
bool
fgSetCurrentDir(
const FgString & dir,
bool throwOnFail)
{
string sdir = dir.as_utf8_string();
bool ret = (chdir(sdir.c_str()) == 0);
if ((!ret) && throwOnFail)
fgThrow("Unable to set current directory to",dir);
return ret;
}
bool
fgRemoveDirectory(
const FgString & dir,
bool throwOnFail)
{
string sdir = dir.as_utf8_string();
int ret = rmdir(sdir.c_str());
if (ret == 0)
return true;
if (throwOnFail)
fgThrow("Unable to remove directory",dir);
return false;
}
bool
fgCreateDirectory(const FgString & dir)
{
string sdir = dir.as_utf8_string();
return (mkdir(sdir.c_str(),0777) == 0);
}
Dir(const FgString & dirName)
{handle = opendir(dirName.as_utf8_string().c_str()); }
