Pillow/_imagingcms.c

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/*
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* pyCMS
* a Python / PIL interface to the littleCMS ICC Color Management System
* Copyright (C) 2002-2003 Kevin Cazabon
* kevin@cazabon.com
* http://www.cazabon.com
* Adapted/reworked for PIL by Fredrik Lundh
* Copyright (c) 2009 Fredrik Lundh
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* Updated to LCMS2
* Copyright (c) 2013 Eric Soroos
*
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* pyCMS home page: http://www.cazabon.com/pyCMS
* littleCMS home page: http://www.littlecms.com
* (littleCMS is Copyright (C) 1998-2001 Marti Maria)
*
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* Originally released under LGPL. Graciously donated to PIL in
* March 2009, for distribution under the standard PIL license
*/
#define COPYRIGHTINFO "\
pyCMS\n\
a Python / PIL interface to the littleCMS ICC Color Management System\n\
Copyright (C) 2002-2003 Kevin Cazabon\n\
kevin@cazabon.com\n\
http://www.cazabon.com\n\
"
#include "Python.h"
#include "lcms2.h"
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#include "Imaging.h"
#include "py3.h"
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#define PYCMSVERSION "1.0.0 pil"
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/* version history */
/*
1.0.0 pil Integrating littleCMS2
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0.1.0 pil integration & refactoring
0.0.2 alpha: Minor updates, added interfaces to littleCMS features, Jan 6, 2003
- fixed some memory holes in how transforms/profiles were created and passed back to Python
due to improper destructor setup for PyCObjects
- added buildProofTransformFromOpenProfiles() function
- eliminated some code redundancy, centralizing several common tasks with internal functions
0.0.1 alpha: First public release Dec 26, 2002
*/
/* known to-do list with current version:
Verify that PILmode->littleCMStype conversion in findLCMStype is correct for all PIL modes (it probably isn't for the more obscure ones)
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Add support for creating custom RGB profiles on the fly
Add support for checking presence of a specific tag in a profile
Add support for other littleCMS features as required
*/
/*
INTENT_PERCEPTUAL 0
INTENT_RELATIVE_COLORIMETRIC 1
INTENT_SATURATION 2
INTENT_ABSOLUTE_COLORIMETRIC 3
*/
/* -------------------------------------------------------------------- */
/* wrapper classes */
/* a profile represents the ICC characteristics for a specific device */
typedef struct {
PyObject_HEAD
cmsHPROFILE profile;
} CmsProfileObject;
static PyTypeObject CmsProfile_Type;
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#define CmsProfile_Check(op) (Py_TYPE(op) == &CmsProfile_Type)
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static PyObject*
cms_profile_new(cmsHPROFILE profile)
{
CmsProfileObject* self;
self = PyObject_New(CmsProfileObject, &CmsProfile_Type);
if (!self)
return NULL;
self->profile = profile;
return (PyObject*) self;
}
static PyObject*
cms_profile_open(PyObject* self, PyObject* args)
{
cmsHPROFILE hProfile;
char* sProfile;
if (!PyArg_ParseTuple(args, "s:profile_open", &sProfile))
return NULL;
hProfile = cmsOpenProfileFromFile(sProfile, "r");
if (!hProfile) {
PyErr_SetString(PyExc_IOError, "cannot open profile file");
return NULL;
}
return cms_profile_new(hProfile);
}
static PyObject*
cms_profile_fromstring(PyObject* self, PyObject* args)
{
cmsHPROFILE hProfile;
char* pProfile;
int nProfile;
#if PY_VERSION_HEX >= 0x03000000
if (!PyArg_ParseTuple(args, "y#:profile_frombytes", &pProfile, &nProfile))
return NULL;
#else
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if (!PyArg_ParseTuple(args, "s#:profile_fromstring", &pProfile, &nProfile))
return NULL;
#endif
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hProfile = cmsOpenProfileFromMem(pProfile, nProfile);
if (!hProfile) {
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PyErr_SetString(PyExc_IOError, "cannot open profile from string");
return NULL;
}
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return cms_profile_new(hProfile);
}
static void
cms_profile_dealloc(CmsProfileObject* self)
{
(void) cmsCloseProfile(self->profile);
PyObject_Del(self);
}
/* a transform represents the mapping between two profiles */
typedef struct {
PyObject_HEAD
char mode_in[8];
char mode_out[8];
cmsHTRANSFORM transform;
} CmsTransformObject;
static PyTypeObject CmsTransform_Type;
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#define CmsTransform_Check(op) (Py_TYPE(op) == &CmsTransform_Type)
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static PyObject*
cms_transform_new(cmsHTRANSFORM transform, char* mode_in, char* mode_out)
{
CmsTransformObject* self;
self = PyObject_New(CmsTransformObject, &CmsTransform_Type);
if (!self)
return NULL;
self->transform = transform;
strcpy(self->mode_in, mode_in);
strcpy(self->mode_out, mode_out);
return (PyObject*) self;
}
static void
cms_transform_dealloc(CmsTransformObject* self)
{
cmsDeleteTransform(self->transform);
PyObject_Del(self);
}
/* -------------------------------------------------------------------- */
/* internal functions */
static const char*
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findICmode(cmsColorSpaceSignature cs)
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{
switch (cs) {
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case cmsSigXYZData: return "XYZ";
case cmsSigLabData: return "LAB";
case cmsSigLuvData: return "LUV";
case cmsSigYCbCrData: return "YCbCr";
case cmsSigYxyData: return "YXY";
case cmsSigRgbData: return "RGB";
case cmsSigGrayData: return "L";
case cmsSigHsvData: return "HSV";
case cmsSigHlsData: return "HLS";
case cmsSigCmykData: return "CMYK";
case cmsSigCmyData: return "CMY";
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default: return ""; /* other TBA */
}
}
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static cmsUInt32Number
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findLCMStype(char* PILmode)
{
if (strcmp(PILmode, "RGB") == 0) {
return TYPE_RGBA_8;
}
else if (strcmp(PILmode, "RGBA") == 0) {
return TYPE_RGBA_8;
}
else if (strcmp(PILmode, "RGBX") == 0) {
return TYPE_RGBA_8;
}
else if (strcmp(PILmode, "RGBA;16B") == 0) {
return TYPE_RGBA_16;
}
else if (strcmp(PILmode, "CMYK") == 0) {
return TYPE_CMYK_8;
}
else if (strcmp(PILmode, "L") == 0) {
return TYPE_GRAY_8;
}
else if (strcmp(PILmode, "L;16") == 0) {
return TYPE_GRAY_16;
}
else if (strcmp(PILmode, "L;16B") == 0) {
return TYPE_GRAY_16_SE;
}
else if (strcmp(PILmode, "YCCA") == 0) {
return TYPE_YCbCr_8;
}
else if (strcmp(PILmode, "YCC") == 0) {
return TYPE_YCbCr_8;
}
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else if (strcmp(PILmode, "LAB") == 0) {
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// LabX equvalent like ALab, but not reversed -- no #define in lcms2
return (COLORSPACE_SH(PT_LabV2)|CHANNELS_SH(3)|BYTES_SH(1)|EXTRA_SH(1));
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}
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else {
/* take a wild guess... but you probably should fail instead. */
return TYPE_GRAY_8; /* so there's no buffer overrun... */
}
}
static int
pyCMSdoTransform(Imaging im, Imaging imOut, cmsHTRANSFORM hTransform)
{
int i;
if (im->xsize > imOut->xsize || im->ysize > imOut->ysize)
return -1;
Py_BEGIN_ALLOW_THREADS
for (i = 0; i < im->ysize; i++)
cmsDoTransform(hTransform, im->image[i], imOut->image[i], im->xsize);
Py_END_ALLOW_THREADS
return 0;
}
static cmsHTRANSFORM
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_buildTransform(cmsHPROFILE hInputProfile, cmsHPROFILE hOutputProfile, char *sInMode, char *sOutMode, int iRenderingIntent, cmsUInt32Number cmsFLAGS)
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{
cmsHTRANSFORM hTransform;
Py_BEGIN_ALLOW_THREADS
/* create the transform */
hTransform = cmsCreateTransform(hInputProfile,
findLCMStype(sInMode),
hOutputProfile,
findLCMStype(sOutMode),
iRenderingIntent, cmsFLAGS);
Py_END_ALLOW_THREADS
if (!hTransform)
PyErr_SetString(PyExc_ValueError, "cannot build transform");
return hTransform; /* if NULL, an exception is set */
}
static cmsHTRANSFORM
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_buildProofTransform(cmsHPROFILE hInputProfile, cmsHPROFILE hOutputProfile, cmsHPROFILE hProofProfile, char *sInMode, char *sOutMode, int iRenderingIntent, int iProofIntent, cmsUInt32Number cmsFLAGS)
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{
cmsHTRANSFORM hTransform;
Py_BEGIN_ALLOW_THREADS
/* create the transform */
hTransform = cmsCreateProofingTransform(hInputProfile,
findLCMStype(sInMode),
hOutputProfile,
findLCMStype(sOutMode),
hProofProfile,
iRenderingIntent,
iProofIntent,
cmsFLAGS);
Py_END_ALLOW_THREADS
if (!hTransform)
PyErr_SetString(PyExc_ValueError, "cannot build proof transform");
return hTransform; /* if NULL, an exception is set */
}
/* -------------------------------------------------------------------- */
/* Python callable functions */
static PyObject *
buildTransform(PyObject *self, PyObject *args) {
CmsProfileObject *pInputProfile;
CmsProfileObject *pOutputProfile;
char *sInMode;
char *sOutMode;
int iRenderingIntent = 0;
int cmsFLAGS = 0;
cmsHTRANSFORM transform = NULL;
if (!PyArg_ParseTuple(args, "O!O!ss|ii:buildTransform", &CmsProfile_Type, &pInputProfile, &CmsProfile_Type, &pOutputProfile, &sInMode, &sOutMode, &iRenderingIntent, &cmsFLAGS))
return NULL;
transform = _buildTransform(pInputProfile->profile, pOutputProfile->profile, sInMode, sOutMode, iRenderingIntent, cmsFLAGS);
if (!transform)
return NULL;
return cms_transform_new(transform, sInMode, sOutMode);
}
static PyObject *
buildProofTransform(PyObject *self, PyObject *args)
{
CmsProfileObject *pInputProfile;
CmsProfileObject *pOutputProfile;
CmsProfileObject *pProofProfile;
char *sInMode;
char *sOutMode;
int iRenderingIntent = 0;
int iProofIntent = 0;
int cmsFLAGS = 0;
cmsHTRANSFORM transform = NULL;
if (!PyArg_ParseTuple(args, "O!O!O!ss|iii:buildProofTransform", &CmsProfile_Type, &pInputProfile, &CmsProfile_Type, &pOutputProfile, &CmsProfile_Type, &pProofProfile, &sInMode, &sOutMode, &iRenderingIntent, &iProofIntent, &cmsFLAGS))
return NULL;
transform = _buildProofTransform(pInputProfile->profile, pOutputProfile->profile, pProofProfile->profile, sInMode, sOutMode, iRenderingIntent, iProofIntent, cmsFLAGS);
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if (!transform)
return NULL;
return cms_transform_new(transform, sInMode, sOutMode);
}
static PyObject *
cms_transform_apply(CmsTransformObject *self, PyObject *args)
{
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Py_ssize_t idIn;
Py_ssize_t idOut;
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Imaging im;
Imaging imOut;
int result;
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if (!PyArg_ParseTuple(args, "nn:apply", &idIn, &idOut))
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return NULL;
im = (Imaging) idIn;
imOut = (Imaging) idOut;
result = pyCMSdoTransform(im, imOut, self->transform);
return Py_BuildValue("i", result);
}
/* -------------------------------------------------------------------- */
/* Python-Callable On-The-Fly profile creation functions */
static PyObject *
createProfile(PyObject *self, PyObject *args)
{
char *sColorSpace;
cmsHPROFILE hProfile;
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cmsFloat64Number dColorTemp = 0.0;
cmsCIExyY whitePoint;
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cmsBool result;
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if (!PyArg_ParseTuple(args, "s|d:createProfile", &sColorSpace, &dColorTemp))
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return NULL;
if (strcmp(sColorSpace, "LAB") == 0) {
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if (dColorTemp > 0.0) {
result = cmsWhitePointFromTemp(&whitePoint, dColorTemp);
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if (!result) {
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PyErr_SetString(PyExc_ValueError, "ERROR: Could not calculate white point from color temperature provided, must be float in degrees Kelvin");
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return NULL;
}
hProfile = cmsCreateLab2Profile(&whitePoint);
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} else {
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hProfile = cmsCreateLab2Profile(NULL);
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}
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}
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else if (strcmp(sColorSpace, "XYZ") == 0) {
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hProfile = cmsCreateXYZProfile();
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}
else if (strcmp(sColorSpace, "sRGB") == 0) {
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hProfile = cmsCreate_sRGBProfile();
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}
else {
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hProfile = NULL;
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}
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if (!hProfile) {
PyErr_SetString(PyExc_ValueError, "failed to create requested color space");
return NULL;
}
return cms_profile_new(hProfile);
}
/* -------------------------------------------------------------------- */
/* profile methods */
static PyObject *
cms_profile_is_intent_supported(CmsProfileObject *self, PyObject *args)
{
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cmsBool result;
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int intent;
int direction;
if (!PyArg_ParseTuple(args, "ii:is_intent_supported", &intent, &direction))
return NULL;
result = cmsIsIntentSupported(self->profile, intent, direction);
/* printf("cmsIsIntentSupported(%p, %d, %d) => %d\n", self->profile, intent, direction, result); */
return PyInt_FromLong(result != 0);
}
#ifdef _WIN32
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static PyObject *
cms_get_display_profile_win32(PyObject* self, PyObject* args)
{
char filename[MAX_PATH];
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cmsUInt32Number filename_size;
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BOOL ok;
int handle = 0;
int is_dc = 0;
if (!PyArg_ParseTuple(args, "|ii:get_display_profile", &handle, &is_dc))
return NULL;
filename_size = sizeof(filename);
if (is_dc) {
ok = GetICMProfile((HDC) handle, &filename_size, filename);
} else {
HDC dc = GetDC((HWND) handle);
ok = GetICMProfile(dc, &filename_size, filename);
ReleaseDC((HWND) handle, dc);
}
if (ok)
return PyUnicode_FromStringAndSize(filename, filename_size-1);
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Py_INCREF(Py_None);
return Py_None;
}
#endif
/* -------------------------------------------------------------------- */
/* Python interface setup */
static PyMethodDef pyCMSdll_methods[] = {
{"profile_open", cms_profile_open, 1},
{"profile_frombytes", cms_profile_fromstring, 1},
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{"profile_fromstring", cms_profile_fromstring, 1},
/* profile and transform functions */
{"buildTransform", buildTransform, 1},
{"buildProofTransform", buildProofTransform, 1},
{"createProfile", createProfile, 1},
/* platform specific tools */
#ifdef _WIN32
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{"get_display_profile_win32", cms_get_display_profile_win32, 1},
#endif
{NULL, NULL}
};
static struct PyMethodDef cms_profile_methods[] = {
{"is_intent_supported", (PyCFunction) cms_profile_is_intent_supported, 1},
{NULL, NULL} /* sentinel */
};
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static PyObject*
_profile_getattr(CmsProfileObject* self, cmsInfoType field)
{
// UNDONE -- check that I'm getting the right fields on these.
// return PyUnicode_DecodeFSDefault(cmsTakeProductName(self->profile));
//wchar_t buf[256]; -- UNDONE need wchar_t for unicode version.
char buf[256];
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cmsUInt32Number written;
written = cmsGetProfileInfoASCII(self->profile,
field,
"en",
"us",
buf,
256);
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if (written) {
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return PyUnicode_FromString(buf);
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}
// UNDONE suppressing error here by sending back blank string.
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return PyUnicode_FromString("");
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}
static PyObject*
cms_profile_getattr_product_desc(CmsProfileObject* self, void* closure)
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{
// description was Description != 'Copyright' || or "%s - %s" (manufacturer, model) in 1.x
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return _profile_getattr(self, cmsInfoDescription);
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}
/* use these four for the individual fields.
*/
static PyObject*
cms_profile_getattr_product_description(CmsProfileObject* self, void* closure)
{
return _profile_getattr(self, cmsInfoDescription);
}
static PyObject*
cms_profile_getattr_product_model(CmsProfileObject* self, void* closure)
{
return _profile_getattr(self, cmsInfoModel);
}
static PyObject*
cms_profile_getattr_product_manufacturer(CmsProfileObject* self, void* closure)
{
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return _profile_getattr(self, cmsInfoManufacturer);
}
static PyObject*
cms_profile_getattr_product_copyright(CmsProfileObject* self, void* closure)
{
return _profile_getattr(self, cmsInfoCopyright);
}
static PyObject*
cms_profile_getattr_rendering_intent(CmsProfileObject* self, void* closure)
{
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return PyInt_FromLong(cmsGetHeaderRenderingIntent(self->profile));
}
static PyObject*
cms_profile_getattr_pcs(CmsProfileObject* self, void* closure)
{
return PyUnicode_DecodeFSDefault(findICmode(cmsGetPCS(self->profile)));
}
static PyObject*
cms_profile_getattr_color_space(CmsProfileObject* self, void* closure)
{
return PyUnicode_DecodeFSDefault(findICmode(cmsGetColorSpace(self->profile)));
}
/* FIXME: add more properties (creation_datetime etc) */
static struct PyGetSetDef cms_profile_getsetters[] = {
{ "product_desc", (getter) cms_profile_getattr_product_desc },
{ "product_description", (getter) cms_profile_getattr_product_description },
{ "product_manufacturer", (getter) cms_profile_getattr_product_manufacturer },
{ "product_model", (getter) cms_profile_getattr_product_model },
{ "product_copyright", (getter) cms_profile_getattr_product_copyright },
{ "rendering_intent", (getter) cms_profile_getattr_rendering_intent },
{ "pcs", (getter) cms_profile_getattr_pcs },
{ "color_space", (getter) cms_profile_getattr_color_space },
{ NULL }
};
static PyTypeObject CmsProfile_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"CmsProfile", sizeof(CmsProfileObject), 0,
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/* methods */
(destructor) cms_profile_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number */
0, /*tp_as_sequence */
0, /*tp_as_mapping */
0, /*tp_hash*/
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT, /*tp_flags*/
0, /*tp_doc*/
0, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
cms_profile_methods, /*tp_methods*/
0, /*tp_members*/
cms_profile_getsetters, /*tp_getset*/
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};
static struct PyMethodDef cms_transform_methods[] = {
{"apply", (PyCFunction) cms_transform_apply, 1},
{NULL, NULL} /* sentinel */
};
static PyObject*
cms_transform_getattr_inputMode(CmsTransformObject* self, void* closure)
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{
return PyUnicode_FromString(self->mode_in);
}
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static PyObject*
cms_transform_getattr_outputMode(CmsTransformObject* self, void* closure)
{
return PyUnicode_FromString(self->mode_out);
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}
static struct PyGetSetDef cms_transform_getsetters[] = {
{ "inputMode", (getter) cms_transform_getattr_inputMode },
{ "outputMode", (getter) cms_transform_getattr_outputMode },
{ NULL }
};
static PyTypeObject CmsTransform_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"CmsTransform", sizeof(CmsTransformObject), 0,
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/* methods */
(destructor) cms_transform_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number */
0, /*tp_as_sequence */
0, /*tp_as_mapping */
0, /*tp_hash*/
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT, /*tp_flags*/
0, /*tp_doc*/
0, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
cms_transform_methods, /*tp_methods*/
0, /*tp_members*/
cms_transform_getsetters, /*tp_getset*/
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};
static int
setup_module(PyObject* m) {
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PyObject *d;
PyObject *v;
d = PyModule_GetDict(m);
/* Ready object types */
PyType_Ready(&CmsProfile_Type);
PyType_Ready(&CmsTransform_Type);
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d = PyModule_GetDict(m);
v = PyUnicode_FromFormat("%d.%d", LCMS_VERSION / 100, LCMS_VERSION % 100);
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PyDict_SetItemString(d, "littlecms_version", v);
return 0;
}
#if PY_VERSION_HEX >= 0x03000000
PyMODINIT_FUNC
PyInit__imagingcms(void) {
PyObject* m;
static PyModuleDef module_def = {
PyModuleDef_HEAD_INIT,
"_imagingcms", /* m_name */
NULL, /* m_doc */
-1, /* m_size */
pyCMSdll_methods, /* m_methods */
};
m = PyModule_Create(&module_def);
if (setup_module(m) < 0)
return NULL;
return m;
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}
#else
PyMODINIT_FUNC
init_imagingcms(void)
{
PyObject *m = Py_InitModule("_imagingcms", pyCMSdll_methods);
setup_module(m);
}
#endif