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Fix T47856: Cycles problem when running from multi-byte path 

This is a mix of regression and old unsupported configuration.

Regression was caused by some checks added on Blender side which was
checking whether python function returned error or not. This made it
impossible to enable Cycles when running from a file path which can't
be encoded with MBCS codepage.

Non-regression issue was that it wasn't possible to use pre-compiled
CUDA kernels when running from a path with non-ascii multi-byte
characters.

This commit fixes regression and CUDA parts, but OSL still can't be
used from a non-ascii location because it uses non-widechar API to
work with file paths by the looks of it. Not sure we can solve this
just from our side by using some codepage trick (UTF-16?) since even
oslc fails to compile shader when there are non-ascii characters in
the path.
This commit is contained in:
Sergey Sharybin 2016-03-23 13:58:31 +01:00
parent 6e31f4f090
commit 21f31e6054
Notes: blender-bot 2023-02-14 08:04:20 +01:00 
Referenced by issue #47856, Cycles problem when running from multi-byte path
5 changed files with 92 additions and 18 deletions
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32
intern/cycles/blender/blender_python.cpp
View File

@ -138,19 +138,29 @@ void python_thread_state_restore(void **python_thread_state)
static const char *PyC_UnicodeAsByte(PyObject *py_str, PyObject **coerce)
{
#ifdef WIN32
/* bug [#31856] oddly enough, Python3.2 --> 3.3 on Windows will throw an
* exception here this needs to be fixed in python:
* see: bugs.python.org/issue15859 */
if(!PyUnicode_Check(py_str)) {
PyErr_BadArgument();
return "";
const char *result = _PyUnicode_AsString(py_str);
if(result) {
/* 99% of the time this is enough but we better support non unicode
* chars since blender doesnt limit this.
*/
return result;
}
#endif
if((*coerce = PyUnicode_EncodeFSDefault(py_str))) {
return PyBytes_AS_STRING(*coerce);
else {
PyErr_Clear();
if(PyBytes_Check(py_str)) {
return PyBytes_AS_STRING(py_str);
}
else if((*coerce = PyUnicode_EncodeFSDefault(py_str))) {
return PyBytes_AS_STRING(*coerce);
}
else {
/* Clear the error, so Cycles can be at leadt used without
* GPU and OSL support,
*/
PyErr_Clear();
return "";
}
}
return "";
}
static PyObject *init_func(PyObject * /*self*/, PyObject *args)

17
intern/cycles/render/osl.cpp
View File

@ -202,13 +202,26 @@ void OSLShaderManager::shading_system_init()
if(ss_shared_users == 0) {
services_shared = new OSLRenderServices();
string shader_path = path_get("shader");
#ifdef _WIN32
/* Annoying thing, Cycles stores paths in UTF-8 codepage, so it can
* operate with file paths with any character. This requires to use wide
* char functions, but OSL uses old fashioned ANSI functions which means:
*
* - We have to convert our paths to ANSI before passing to OSL
* - OSL can't be used when there's a multi-byte character in the path
* to the shaders folder.
*/
shader_path = string_to_ansi(shader_path);
#endif
ss_shared = new OSL::ShadingSystem(services_shared, ts_shared, &errhandler);
ss_shared->attribute("lockgeom", 1);
ss_shared->attribute("commonspace", "world");
ss_shared->attribute("searchpath:shader", path_get("shader"));
ss_shared->attribute("searchpath:shader", shader_path);
ss_shared->attribute("greedyjit", 1);
VLOG(1) << "Using shader search path: " << path_get("shader");
VLOG(1) << "Using shader search path: " << shader_path;
/* our own ray types */
static const char *raytypes[] = {

12
intern/cycles/util/util_path.cpp
View File

@ -56,7 +56,6 @@ typedef struct _stat path_stat_t;
# ifndef S_ISDIR
# define S_ISDIR(x) (((x) & _S_IFDIR) == _S_IFDIR)
# endif
# define mkdir(path, mode) _mkdir(path)
#else
typedef struct stat path_stat_t;
#endif
@ -626,7 +625,12 @@ static bool create_directories_recursivey(const string& path)
}
}
#ifdef _WIN32
wstring path_wc = string_to_wstring(path);
return _wmkdir(path_wc.c_str()) == 0;
#else
return mkdir(path.c_str(), 0777) == 0;
#endif
}
void path_create_directories(const string& filepath)
@ -745,7 +749,13 @@ string path_source_replace_includes(const string& source_, const string& path)
FILE *path_fopen(const string& path, const string& mode)
{
#ifdef _WIN32
wstring path_wc = string_to_wstring(path);
wstring mode_wc = string_to_wstring(mode);
return _wfopen(path_wc.c_str(), mode_wc.c_str());
#else
return fopen(path.c_str(), mode.c_str());
#endif
}
void path_cache_clear_except(const string& name, const set<string>& except)

44
intern/cycles/util/util_string.cpp
View File

@ -165,14 +165,14 @@ string string_from_bool(bool var)
wstring string_to_wstring(const string& str)
{
const int length_wc = MultiByteToWideChar(CP_ACP,
const int length_wc = MultiByteToWideChar(CP_UTF8,
0,
str.c_str(),
str.length(),
NULL,
0);
wstring str_wc(length_wc, 0);
MultiByteToWideChar(CP_ACP,
MultiByteToWideChar(CP_UTF8,
0,
str.c_str(),
str.length(),
@ -183,7 +183,7 @@ wstring string_to_wstring(const string& str)
string string_from_wstring(const wstring& str)
{
int length_mb = WideCharToMultiByte(CP_ACP,
int length_mb = WideCharToMultiByte(CP_UTF8,
0,
str.c_str(),
str.size(),
@ -191,7 +191,7 @@ string string_from_wstring(const wstring& str)
0,
NULL, NULL);
string str_mb(length_mb, 0);
WideCharToMultiByte(CP_ACP,
WideCharToMultiByte(CP_UTF8,
0,
str.c_str(),
str.size(),
@ -201,6 +201,42 @@ string string_from_wstring(const wstring& str)
return str_mb;
}
string string_to_ansi(const string& str)
{
const int length_wc = MultiByteToWideChar(CP_UTF8,
0,
str.c_str(),
str.length(),
NULL,
0);
wstring str_wc(length_wc, 0);
MultiByteToWideChar(CP_UTF8,
0,
str.c_str(),
str.length(),
&str_wc[0],
length_wc);
int length_mb = WideCharToMultiByte(CP_ACP,
0,
str_wc.c_str(),
str_wc.size(),
NULL,
0,
NULL, NULL);
string str_mb(length_mb, 0);
WideCharToMultiByte(CP_ACP,
0,
str_wc.c_str(),
str_wc.size(),
&str_mb[0],
length_mb,
NULL, NULL);
return str_mb;
}
#endif /* _WIN32 */
CCL_NAMESPACE_END

5
intern/cycles/util/util_string.h
View File

@ -50,11 +50,16 @@ string string_from_bool(const bool var);
/* Wide char strings are only used on Windows to deal with non-ascii
* characters in file names and such. No reason to use such strings
* for something else at this moment.
*
* Please note that strings are expected to be in UTF-8 codepage, and
* if ANSI is needed then explicit conversion required.
*
*/
#ifdef _WIN32
using std::wstring;
wstring string_to_wstring(const string& path);
string string_from_wstring(const wstring& path);
string string_to_ansi(const string& str);
#endif
CCL_NAMESPACE_END