Re: Reading Dicom files in Dlang
On Monday, 3 June 2019 at 15:56:00 UTC, Rémy Mouëza wrote: On Monday, 3 June 2019 at 14:19:40 UTC, Rnd wrote: [...] We can call C functions directly from D. First, the functions must be declared in D, as D's syntax is different from C's. [...] Thanks for a very comprehensive answer.
Re: Reading Dicom files in Dlang
On Monday, 3 June 2019 at 14:19:40 UTC, Rnd wrote:
On Friday, 31 May 2019 at 16:43:28 UTC, rnd wrote:
On Friday, 31 May 2019 at 13:49:02 UTC, KnightMare wrote:
struct Range {
private __vector(ushort) _outer;
private size_t _a, _b;
this(vector(ushort) data, size_t a, size_t b) { //
line 457
_outer = data;
_a = a;
_b = b;
}
imo problem is in string
private __vector(ushort)_outer;
it looks like template(vector!ushort) or function or this is
vector from core.simd
and replacing it to private long _outer; fix the problem
paste code imebra.d and imebra_im.d to someplace
Best to download it from https://imebra.com/get-it/ so that
all files are available to you.
I am still waiting for someone to help me with this.
Can we directly call C functions from D without going through
swig?
We can call C functions directly from D. First, the functions
must be declared in D, as D's syntax is different from C's.
There exists tools to help us with that :
- dstep, https://code.dlang.org/packages/dstep
- dpp, https://code.dlang.org/packages/dpp
The latter, dpp, acts like a preprocessor to allow inclusion with
`#include` as would be done with C header files.
The swig D module is quite old and I would presume it is outdated
- but I may be wrong.
Note that the standard C library is available in the `core.stdc`
modules.
Sometimes, these tools manage to translate 95% of header files
properly, but some manual tweaking is necessary to handle the
remaining 5%. The following page in the D documentation explains
how to interface with C: https://dlang.org/spec/interfaceToC.html
.
Looking at the output generally gives a good inspiration of what
code pattern to use to fix the issues.
C++ is a different matter. The binding tool ecosystem gives more
mixed results than with C:
- dstep does not generate declarations for C++;
- dpp is still a work in progress; the last time I looked at its
commits, I saw some unit tests checking the binding of simple
classes - but I wouldn't expect it to work with much of the STL;
- There exist Binderoo: https://github.com/GooberMan/binderoo
which is a mean to script C++ game using D, less active than the
first two, but could be helpful, I haven't researched it much.
The author gave a presentation during DConf 2017:
https://www.youtube.com/watch?v=2B0-jukh4TU .
The following page of the D documentation explains how to
interface with C++: https://dlang.org/spec/cpp_interface.html .
Interfacing with C is much easier than with C++. I was once in
need of a C++ library without any C API; I wrote a wrapper for it:
- some C++ function within an `extern "C" {}` declaration,
- with helper function to create and delete my C++ class
instances,
- the main C++ methods I wanted to expose,
- a D binding declaration, exposing the previous function to D,
- a higher level D mirroring the C++ classes,
- exception were caught in the C++ `extern "C" {}` function: I
returned a special Result struct containing a boolean status, the
result or null, and a possible error message. I would then throw
a D exception to let the user code handle the error.
Nowadays, D's C++ support is better. If you can restrict to just
a subset of the library, writing a wrapper might be feasible, but
would include wrapping part of the STL not yet in the
`core.stdcpp` modules (for libraries using the STL).
Re: Reading Dicom files in Dlang
On Friday, 31 May 2019 at 16:43:28 UTC, rnd wrote:
On Friday, 31 May 2019 at 13:49:02 UTC, KnightMare wrote:
struct Range {
private __vector(ushort) _outer;
private size_t _a, _b;
this(vector(ushort) data, size_t a, size_t b) { //
line 457
_outer = data;
_a = a;
_b = b;
}
imo problem is in string
private __vector(ushort)_outer;
it looks like template(vector!ushort) or function or this is
vector from core.simd
and replacing it to private long _outer; fix the problem
paste code imebra.d and imebra_im.d to someplace
Best to download it from https://imebra.com/get-it/ so that all
files are available to you.
I am still waiting for someone to help me with this.
Can we directly call C functions from D without going through
swig?
Re: Reading Dicom files in Dlang
On Friday, 31 May 2019 at 13:49:02 UTC, KnightMare wrote:
struct Range {
private __vector(ushort) _outer;
private size_t _a, _b;
this(vector(ushort) data, size_t a, size_t b) { //
line 457
_outer = data;
_a = a;
_b = b;
}
imo problem is in string
private __vector(ushort)_outer;
it looks like template(vector!ushort) or function or this is
vector from core.simd
and replacing it to private long _outer; fix the problem
paste code imebra.d and imebra_im.d to someplace
Best to download it from https://imebra.com/get-it/ so that all
files are available to you.
Re: Reading Dicom files in Dlang
struct Range {
private __vector(ushort) _outer;
private size_t _a, _b;
this(vector(ushort) data, size_t a, size_t b) { //
line 457
_outer = data;
_a = a;
_b = b;
}
imo problem is in string
private __vector(ushort)_outer;
it looks like template(vector!ushort) or function or this is
vector from core.simd
and replacing it to private long _outer; fix the problem
paste code imebra.d and imebra_im.d to someplace
Re: Reading Dicom files in Dlang
On Friday, 31 May 2019 at 11:20:15 UTC, KnightMare wrote:
whats wrong with answer at SO?
https://stackoverflow.com/questions/56278268/reading-dicom-files-in-dlang
dlang_wrapper.so file is created.
I try to access it with following file:
import imebra;
import imebra_im;
import core.stdc.stdio;
import core.stdc.stdlib;
import core.sys.posix.dlfcn;
extern (C) int ldl();
void main(){
//auto loadedDataSet = CodecFactory.load("33141578.dcm") ;
printf("+main()\n");
void* lh = dlopen("libdlang_wrapper.so", RTLD_LAZY);
if (!lh) {
fprintf(stderr, "dlopen error: %s\n", dlerror());
exit(1);
}
printf("libdlang_wrapper.so is loaded\n");
}
But it gives following error:
$ rdmd rntestImebra.d
imebra.d(457): Error: function declaration without return type.
(Note that constructors are always named this)
imebra.d(457): Error: found data when expecting )
imebra.d(457): Error: semicolon expected following function
declaration
imebra.d(457): Error: declaration expected, not ,
imebra.d(459): Error: no identifier for declarator _a
imebra.d(459): Error: declaration expected, not =
imebra.d(460): Error: no identifier for declarator _b
imebra.d(460): Error: declaration expected, not =
imebra.d(464): Error: function declaration without return type.
(Note that constructors are always named this)
imebra.d(731): Error: function declaration without return type.
(Note that constructors are always named this)
imebra.d(731): Error: found other when expecting )
imebra.d(731): Error: semicolon expected following function
declaration
imebra.d(731): Error: declaration expected, not )
imebra.d(733): Error: declaration expected, not if
imebra.d(734): Error: unrecognized declaration
imebra_im.d(51): Error: module `string` is in file
'std/c/string.d' which cannot be read
import path[0] = .
import path[1] = /usr/include/dmd/phobos
import path[2] = /usr/include/dmd/druntime/import
Failed: ["/usr/bin/dmd", "-v", "-o-", "rntestImebra.d", "-I."]
Line 457 of part of this code:
struct Range {
private __vector(ushort) _outer;
private size_t _a, _b;
this(vector(ushort) data, size_t a, size_t b) { // <<<<<<<<
line 457
_outer = data;
_a = a;
_b = b;
}
Re: Reading Dicom files in Dlang
whats wrong with answer at SO? https://stackoverflow.com/questions/56278268/reading-dicom-files-in-dlang
Reading Dicom files in Dlang
Is it possible to read Dicom (https://en.wikipedia.org/wiki/DICOM ) images (which are widely used in medical field) using D language? Dicom specifications are given here: https://www.dicomstandard.org/current/ There is some discussion on this topic on this page but no details on this forum: https://forum.dlang.org/post/fsjefp$10sp$1...@digitalmars.com I do not think there are any specific d library for this purpose but there are many C libraries available, e.g. : https://dicom.offis.de/dcmtk.php.en and https://github.com/dgobbi/vtk-dicom There is some discussion here on using C for reading Dicom files on [this forum][3]. Can one of these libraries be used to read Dicom images in D language? PS: Sample Dicom images are available here: https://www.dicomlibrary.com/ Wrapper for Imebra has been suggested here (https://stackoverflow.com/questions/56278268/reading-dicom-files-in-dlang ) but it is not working.
