/* * The Python Imaging Library * * a simple math add-on for the Python Imaging Library * * history: * 1999-02-15 fl Created * 2005-05-05 fl Simplified and cleaned up for PIL 1.1.6 * * Copyright (c) 1999-2005 by Secret Labs AB * Copyright (c) 2005 by Fredrik Lundh * * See the README file for information on usage and redistribution. */ #include "Python.h" #include "libImaging/Imaging.h" #include "math.h" #include "float.h" #define MAX_INT32 2147483647.0 #define MIN_INT32 -2147483648.0 #define UNOP(name, op, type) \ void name(Imaging out, Imaging im1) { \ int x, y; \ for (y = 0; y < out->ysize; y++) { \ type *p0 = (type *)out->image[y]; \ type *p1 = (type *)im1->image[y]; \ for (x = 0; x < out->xsize; x++) { \ *p0 = op(type, *p1); \ p0++; \ p1++; \ } \ } \ } #define BINOP(name, op, type) \ void name(Imaging out, Imaging im1, Imaging im2) { \ int x, y; \ for (y = 0; y < out->ysize; y++) { \ type *p0 = (type *)out->image[y]; \ type *p1 = (type *)im1->image[y]; \ type *p2 = (type *)im2->image[y]; \ for (x = 0; x < out->xsize; x++) { \ *p0 = op(type, *p1, *p2); \ p0++; \ p1++; \ p2++; \ } \ } \ } #define NEG(type, v1) -(v1) #define INVERT(type, v1) ~(v1) #define ADD(type, v1, v2) (v1) + (v2) #define SUB(type, v1, v2) (v1) - (v2) #define MUL(type, v1, v2) (v1) * (v2) #define MIN(type, v1, v2) ((v1) < (v2)) ? (v1) : (v2) #define MAX(type, v1, v2) ((v1) > (v2)) ? (v1) : (v2) #define AND(type, v1, v2) (v1) & (v2) #define OR(type, v1, v2) (v1) | (v2) #define XOR(type, v1, v2) (v1) ^ (v2) #define LSHIFT(type, v1, v2) (v1) << (v2) #define RSHIFT(type, v1, v2) (v1) >> (v2) #define ABS_I(type, v1) abs((v1)) #define ABS_F(type, v1) fabs((v1)) /* -------------------------------------------------------------------- * some day, we should add FPE protection mechanisms. see pyfpe.h for * details. * * PyFPE_START_PROTECT("Error in foobar", return 0) * PyFPE_END_PROTECT(result) */ #define DIV_I(type, v1, v2) ((v2) != 0) ? (v1) / (v2) : 0 #define DIV_F(type, v1, v2) ((v2) != 0.0F) ? (v1) / (v2) : 0.0F #define MOD_I(type, v1, v2) ((v2) != 0) ? (v1) % (v2) : 0 #define MOD_F(type, v1, v2) ((v2) != 0.0F) ? fmod((v1), (v2)) : 0.0F static int powi(int x, int y) { double v = pow(x, y) + 0.5; if (errno == EDOM) { return 0; } if (v < MIN_INT32) { v = MIN_INT32; } else if (v > MAX_INT32) { v = MAX_INT32; } return (int)v; } #define POW_I(type, v1, v2) powi(v1, v2) #define POW_F(type, v1, v2) powf(v1, v2) /* FIXME: EDOM handling */ #define DIFF_I(type, v1, v2) abs((v1) - (v2)) #define DIFF_F(type, v1, v2) fabs((v1) - (v2)) #define EQ(type, v1, v2) (v1) == (v2) #define NE(type, v1, v2) (v1) != (v2) #define LT(type, v1, v2) (v1) < (v2) #define LE(type, v1, v2) (v1) <= (v2) #define GT(type, v1, v2) (v1) > (v2) #define GE(type, v1, v2) (v1) >= (v2) UNOP(abs_I, ABS_I, INT32) UNOP(neg_I, NEG, INT32) BINOP(add_I, ADD, INT32) BINOP(sub_I, SUB, INT32) BINOP(mul_I, MUL, INT32) BINOP(div_I, DIV_I, INT32) BINOP(mod_I, MOD_I, INT32) BINOP(pow_I, POW_I, INT32) BINOP(diff_I, DIFF_I, INT32) UNOP(invert_I, INVERT, INT32) BINOP(and_I, AND, INT32) BINOP(or_I, OR, INT32) BINOP(xor_I, XOR, INT32) BINOP(lshift_I, LSHIFT, INT32) BINOP(rshift_I, RSHIFT, INT32) BINOP(min_I, MIN, INT32) BINOP(max_I, MAX, INT32) BINOP(eq_I, EQ, INT32) BINOP(ne_I, NE, INT32) BINOP(lt_I, LT, INT32) BINOP(le_I, LE, INT32) BINOP(gt_I, GT, INT32) BINOP(ge_I, GE, INT32) UNOP(abs_F, ABS_F, FLOAT32) UNOP(neg_F, NEG, FLOAT32) BINOP(add_F, ADD, FLOAT32) BINOP(sub_F, SUB, FLOAT32) BINOP(mul_F, MUL, FLOAT32) BINOP(div_F, DIV_F, FLOAT32) BINOP(mod_F, MOD_F, FLOAT32) BINOP(pow_F, POW_F, FLOAT32) BINOP(diff_F, DIFF_F, FLOAT32) BINOP(min_F, MIN, FLOAT32) BINOP(max_F, MAX, FLOAT32) BINOP(eq_F, EQ, FLOAT32) BINOP(ne_F, NE, FLOAT32) BINOP(lt_F, LT, FLOAT32) BINOP(le_F, LE, FLOAT32) BINOP(gt_F, GT, FLOAT32) BINOP(ge_F, GE, FLOAT32) static PyObject * _unop(PyObject *self, PyObject *args) { Imaging out; Imaging im1; void (*unop)(Imaging, Imaging); Py_ssize_t op, i0, i1; if (!PyArg_ParseTuple(args, "nnn", &op, &i0, &i1)) { return NULL; } out = (Imaging)i0; im1 = (Imaging)i1; unop = (void *)op; unop(out, im1); Py_INCREF(Py_None); return Py_None; } static PyObject * _binop(PyObject *self, PyObject *args) { Imaging out; Imaging im1; Imaging im2; void (*binop)(Imaging, Imaging, Imaging); Py_ssize_t op, i0, i1, i2; if (!PyArg_ParseTuple(args, "nnnn", &op, &i0, &i1, &i2)) { return NULL; } out = (Imaging)i0; im1 = (Imaging)i1; im2 = (Imaging)i2; binop = (void *)op; binop(out, im1, im2); Py_INCREF(Py_None); return Py_None; } static PyMethodDef _functions[] = { {"unop", _unop, 1}, {"binop", _binop, 1}, {NULL, NULL}}; static void install(PyObject *d, char *name, void *value) { PyObject *v = PyLong_FromSsize_t((Py_ssize_t)value); if (!v || PyDict_SetItemString(d, name, v)) { PyErr_Clear(); } Py_XDECREF(v); } static int setup_module(PyObject *m) { PyObject *d = PyModule_GetDict(m); install(d, "abs_I", abs_I); install(d, "neg_I", neg_I); install(d, "add_I", add_I); install(d, "sub_I", sub_I); install(d, "diff_I", diff_I); install(d, "mul_I", mul_I); install(d, "div_I", div_I); install(d, "mod_I", mod_I); install(d, "min_I", min_I); install(d, "max_I", max_I); install(d, "pow_I", pow_I); install(d, "invert_I", invert_I); install(d, "and_I", and_I); install(d, "or_I", or_I); install(d, "xor_I", xor_I); install(d, "lshift_I", lshift_I); install(d, "rshift_I", rshift_I); install(d, "eq_I", eq_I); install(d, "ne_I", ne_I); install(d, "lt_I", lt_I); install(d, "le_I", le_I); install(d, "gt_I", gt_I); install(d, "ge_I", ge_I); install(d, "abs_F", abs_F); install(d, "neg_F", neg_F); install(d, "add_F", add_F); install(d, "sub_F", sub_F); install(d, "diff_F", diff_F); install(d, "mul_F", mul_F); install(d, "div_F", div_F); install(d, "mod_F", mod_F); install(d, "min_F", min_F); install(d, "max_F", max_F); install(d, "pow_F", pow_F); install(d, "eq_F", eq_F); install(d, "ne_F", ne_F); install(d, "lt_F", lt_F); install(d, "le_F", le_F); install(d, "gt_F", gt_F); install(d, "ge_F", ge_F); return 0; } PyMODINIT_FUNC PyInit__imagingmath(void) { PyObject *m; static PyModuleDef module_def = { PyModuleDef_HEAD_INIT, "_imagingmath", /* m_name */ NULL, /* m_doc */ -1, /* m_size */ _functions, /* m_methods */ }; m = PyModule_Create(&module_def); if (setup_module(m) < 0) { return NULL; } return m; }