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color.c
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color.c
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/*
pygame - Python Game Library
Copyright (C) 2008 Marcus von Appen
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* The follow bug was reported for the pygame.math module:
*
* Adjust gcc 4.4 optimization for floating point on x86-32 PCs running Linux.
* This addresses bug 52:
* http://pygame.motherhamster.org/bugzilla/show_bug.cgi?id=52
*
* Apparently, the same problem plagues pygame.color, as it failed the
* test_hsva__all_elements_within_limits and
* test_hsva__sanity_testing_converted_should_not_raise test cases due
* to slight, on the order of 10e-14, discrepencies in calculated double
* values.
*/
#if defined(__GNUC__) && defined(__linux__) && defined(__i386__) && \
__SIZEOF_POINTER__ == 4 && __GNUC__ == 4 && __GNUC_MINOR__ >= 4
#pragma GCC optimize("float-store")
#endif
#define PYGAMEAPI_COLOR_INTERNAL
#include "doc/color_doc.h"
#include "pygame.h"
#include "pgcompat.h"
#include <ctype.h>
typedef struct {
PyObject_HEAD
/* RGBA */
Uint8 data[4];
Uint8 len;
} pgColorObject;
typedef enum { TRISTATE_SUCCESS, TRISTATE_FAIL, TRISTATE_ERROR } tristate;
static PyObject *_COLORDICT = NULL;
static int
_get_double(PyObject *, double *);
static int
_get_color(PyObject *, Uint32 *);
static int
_hextoint(char *, Uint8 *);
static tristate
_hexcolor(PyObject *, Uint8 *);
static int
_coerce_obj(PyObject *, Uint8 *);
static pgColorObject *
_color_new_internal(PyTypeObject *, const Uint8 *);
static pgColorObject *
_color_new_internal_length(PyTypeObject *, const Uint8 *, Uint8);
static PyObject *
_color_new(PyTypeObject *, PyObject *, PyObject *);
static int
_color_init(pgColorObject *, PyObject *, PyObject *);
static void
_color_dealloc(pgColorObject *);
static PyObject *
_color_repr(pgColorObject *);
static PyObject *
_color_normalize(pgColorObject *);
static PyObject *
_color_correct_gamma(pgColorObject *, PyObject *);
static PyObject *
_color_set_length(pgColorObject *, PyObject *);
/* Getters/setters */
static PyObject *
_color_get_r(pgColorObject *, void *);
static int
_color_set_r(pgColorObject *, PyObject *, void *);
static PyObject *
_color_get_g(pgColorObject *, void *);
static int
_color_set_g(pgColorObject *, PyObject *, void *);
static PyObject *
_color_get_b(pgColorObject *, void *);
static int
_color_set_b(pgColorObject *, PyObject *, void *);
static PyObject *
_color_get_a(pgColorObject *, void *);
static int
_color_set_a(pgColorObject *, PyObject *, void *);
static PyObject *
_color_get_hsva(pgColorObject *, void *);
static int
_color_set_hsva(pgColorObject *, PyObject *, void *);
static PyObject *
_color_get_hsla(pgColorObject *, void *);
static int
_color_set_hsla(pgColorObject *, PyObject *, void *);
static PyObject *
_color_get_i1i2i3(pgColorObject *, void *);
static int
_color_set_i1i2i3(pgColorObject *, PyObject *, void *);
static PyObject *
_color_get_cmy(pgColorObject *, void *);
static int
_color_set_cmy(pgColorObject *, PyObject *, void *);
static PyObject *
_color_get_arraystruct(pgColorObject *, void *);
/* Number protocol methods */
static PyObject *
_color_add(PyObject *, PyObject *);
static PyObject *
_color_sub(PyObject *, PyObject *);
static PyObject *
_color_mul(PyObject *, PyObject *);
static PyObject *
_color_div(PyObject *, PyObject *);
static PyObject *
_color_mod(PyObject *, PyObject *);
static PyObject *
_color_inv(pgColorObject *);
static PyObject *
_color_int(pgColorObject *);
static PyObject *
_color_float(pgColorObject *);
#if !PY3
static PyObject *
_color_long(pgColorObject *);
static PyObject *
_color_oct(pgColorObject *);
static PyObject *
_color_hex(pgColorObject *);
#endif
/* Sequence protocol methods */
static Py_ssize_t
_color_length(pgColorObject *);
static PyObject *
_color_item(pgColorObject *, Py_ssize_t);
static int
_color_ass_item(pgColorObject *, Py_ssize_t, PyObject *);
static PyObject *
_color_slice(register pgColorObject *, register Py_ssize_t,
register Py_ssize_t);
/* Mapping protocol methods. */
static PyObject *
_color_subscript(pgColorObject *, PyObject *);
/* Comparison */
static PyObject *
_color_richcompare(PyObject *, PyObject *, int);
/* New buffer protocol methods. */
static int
_color_getbuffer(pgColorObject *, Py_buffer *, int);
/* C API interfaces */
static PyObject *
pgColor_New(Uint8 rgba[]);
static PyObject *
pgColor_NewLength(Uint8 rgba[], Uint8 length);
static int
pg_RGBAFromColorObj(PyObject *color, Uint8 rgba[]);
/**
* Methods, which are bound to the pgColorObject type.
*/
static PyMethodDef _color_methods[] = {
{"normalize", (PyCFunction)_color_normalize, METH_NOARGS,
DOC_COLORNORMALIZE},
{"correct_gamma", (PyCFunction)_color_correct_gamma, METH_VARARGS,
DOC_COLORCORRECTGAMMA},
{"set_length", (PyCFunction)_color_set_length, METH_VARARGS,
DOC_COLORSETLENGTH},
{NULL, NULL, 0, NULL}};
/**
* Getters and setters for the pgColorObject.
*/
static PyGetSetDef _color_getsets[] = {
{"r", (getter)_color_get_r, (setter)_color_set_r, DOC_COLORR, NULL},
{"g", (getter)_color_get_g, (setter)_color_set_g, DOC_COLORG, NULL},
{"b", (getter)_color_get_b, (setter)_color_set_b, DOC_COLORB, NULL},
{"a", (getter)_color_get_a, (setter)_color_set_a, DOC_COLORA, NULL},
{"hsva", (getter)_color_get_hsva, (setter)_color_set_hsva, DOC_COLORHSVA,
NULL},
{"hsla", (getter)_color_get_hsla, (setter)_color_set_hsla, DOC_COLORHSLA,
NULL},
{"i1i2i3", (getter)_color_get_i1i2i3, (setter)_color_set_i1i2i3,
DOC_COLORI1I2I3, NULL},
{"cmy", (getter)_color_get_cmy, (setter)_color_set_cmy, DOC_COLORCMY,
NULL},
{"__array_struct__", (getter)_color_get_arraystruct, NULL,
"array structure interface, read only", NULL},
{NULL, NULL, NULL, NULL, NULL}};
static PyNumberMethods _color_as_number = {
(binaryfunc)_color_add, /* nb_add */
(binaryfunc)_color_sub, /* nb_subtract */
(binaryfunc)_color_mul, /* nb_multiply */
#if !PY3
(binaryfunc)_color_div, /* nb_divide */
#endif
(binaryfunc)_color_mod, /* nb_remainder */
NULL, /* nb_divmod */
NULL, /* nb_power */
NULL, /* nb_negative */
NULL, /* nb_positive */
NULL, /* nb_absolute */
NULL, /* nb_nonzero / nb_bool*/
(unaryfunc)_color_inv, /* nb_invert */
NULL, /* nb_lshift */
NULL, /* nb_rshift */
NULL, /* nb_and */
NULL, /* nb_xor */
NULL, /* nb_or */
#if !PY3
NULL, /* nb_coerce */
#endif
(unaryfunc)_color_int, /* nb_int */
#if PY3
NULL, /* nb_reserved */
#else
(unaryfunc)_color_long, /* nb_long */
#endif
(unaryfunc)_color_float, /* nb_float */
#if !PY3
(unaryfunc)_color_oct, /* nb_oct */
(unaryfunc)_color_hex, /* nb_hex */
#endif
NULL, /* nb_inplace_add */
NULL, /* nb_inplace_subtract */
NULL, /* nb_inplace_multiply */
#if !PY3
NULL, /* nb_inplace_divide */
#endif
NULL, /* nb_inplace_remainder */
NULL, /* nb_inplace_power */
NULL, /* nb_inplace_lshift */
NULL, /* nb_inplace_rshift */
NULL, /* nb_inplace_and */
NULL, /* nb_inplace_xor */
NULL, /* nb_inplace_or */
(binaryfunc)_color_div, /* nb_floor_divide */
NULL, /* nb_true_divide */
NULL, /* nb_inplace_floor_divide */
NULL, /* nb_inplace_true_divide */
(unaryfunc)_color_int, /* nb_index */
};
/**
* Sequence interface support for pgColorObject.
*/
static PySequenceMethods _color_as_sequence = {
(lenfunc)_color_length, /* sq_length */
NULL, /* sq_concat */
NULL, /* sq_repeat */
(ssizeargfunc)_color_item, /* sq_item */
(ssizessizeargfunc)_color_slice, /* sq_slice */
(ssizeobjargproc)_color_ass_item, /* sq_ass_item */
NULL, /* sq_ass_slice */
NULL, /* sq_contains */
NULL, /* sq_inplace_concat */
NULL, /* sq_inplace_repeat */
};
static PyMappingMethods _color_as_mapping = {
(lenfunc)_color_length, (binaryfunc)_color_subscript, NULL};
#if PG_ENABLE_NEWBUF
static PyBufferProcs _color_as_buffer = {
#if HAVE_OLD_BUFPROTO
NULL,
NULL,
NULL,
NULL,
#endif
(getbufferproc)_color_getbuffer,
NULL};
#endif
#define COLOR_TPFLAGS_COMMON \
(Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_CHECKTYPES)
#if PY2 && PG_ENABLE_NEWBUF
#define COLOR_TPFLAGS (COLOR_TPFLAGS_COMMON | Py_TPFLAGS_HAVE_NEWBUFFER)
#else
#define COLOR_TPFLAGS COLOR_TPFLAGS_COMMON
#endif
#define DEFERRED_ADDRESS(ADDR) 0
static PyTypeObject pgColor_Type = {
TYPE_HEAD(NULL, 0) "pygame.Color", /* tp_name */
sizeof(pgColorObject), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)_color_dealloc, /* tp_dealloc */
NULL, /* tp_print */
NULL, /* tp_getattr */
NULL, /* tp_setattr */
NULL, /* tp_compare */
(reprfunc)_color_repr, /* tp_repr */
&_color_as_number, /* tp_as_number */
&_color_as_sequence, /* tp_as_sequence */
&_color_as_mapping, /* tp_as_mapping */
NULL, /* tp_hash */
NULL, /* tp_call */
NULL, /* tp_str */
NULL, /* tp_getattro */
NULL, /* tp_setattro */
#if PG_ENABLE_NEWBUF
&_color_as_buffer, /* tp_as_buffer */
#else
NULL, /* tp_as_buffer */
#endif
COLOR_TPFLAGS,
DOC_PYGAMECOLOR, /* tp_doc */
NULL, /* tp_traverse */
NULL, /* tp_clear */
_color_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */
NULL, /* tp_iter */
NULL, /* tp_iternext */
_color_methods, /* tp_methods */
NULL, /* tp_members */
_color_getsets, /* tp_getset */
NULL, /* tp_base */
NULL, /* tp_dict */
NULL, /* tp_descr_get */
NULL, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)_color_init, /* tp_init */
NULL, /* tp_alloc */
_color_new, /* tp_new */
#ifndef __SYMBIAN32__
NULL, /* tp_free */
NULL, /* tp_is_gc */
NULL, /* tp_bases */
NULL, /* tp_mro */
NULL, /* tp_cache */
NULL, /* tp_subclasses */
NULL, /* tp_weaklist */
NULL /* tp_del */
#endif
};
#define PyColor_Check(o) ((o)->ob_type == (PyTypeObject *)&pgColor_Type)
#define RGB_EQUALS(x, y) \
((((pgColorObject *)x)->data[0] == ((pgColorObj *)y)->data[0]) && \
(((pgColorObject *)x)->data[1] == ((pgColorObj *)y)->data[1]) && \
(((pgColorObject *)x)->data[2] == ((pgColorObj *)y)->data[2]) && \
(((pgColorObject *)x)->data[3] == ((pgColorObj *)y)->data[3]))
static int
_get_double(PyObject *obj, double *val)
{
PyObject *floatobj;
if (!(floatobj = PyNumber_Float(obj))) {
return 0;
}
*val = PyFloat_AsDouble(floatobj);
Py_DECREF(floatobj);
return 1;
}
static int
_get_color(PyObject *val, Uint32 *color)
{
if (!val || !color) {
return 0;
}
#if !PY3
if (PyInt_Check(val)) {
long intval = PyInt_AsLong(val);
if (intval == -1 && PyErr_Occurred()) {
PyErr_SetString(PyExc_ValueError, "invalid color argument");
return 0;
}
*color = (Uint32)intval;
return 1;
}
#endif
if (PyLong_Check(val)) {
unsigned long longval = PyLong_AsUnsignedLong(val);
if (PyErr_Occurred()) {
PyErr_SetString(PyExc_ValueError, "invalid color argument");
return 0;
}
*color = (Uint32)longval;
return 1;
}
/* Failed */
PyErr_SetString(PyExc_ValueError, "invalid color argument");
return 0;
}
static int
_hextoint(char *hex, Uint8 *val)
{
/* 'hex' is a two digit hexadecimal number, no spaces, no signs.
* This algorithm is brute force, but it is character system agnostic.
* It is definitely not a general purpose solution.
*/
Uint8 temp = 0;
switch (toupper(hex[0])) {
case '0':
break;
case '1':
temp += 0x10;
break;
case '2':
temp += 0x20;
break;
case '3':
temp += 0x30;
break;
case '4':
temp += 0x40;
break;
case '5':
temp += 0x50;
break;
case '6':
temp += 0x60;
break;
case '7':
temp += 0x70;
break;
case '8':
temp += 0x80;
break;
case '9':
temp += 0x90;
break;
case 'A':
temp += 0xA0;
break;
case 'B':
temp += 0xB0;
break;
case 'C':
temp += 0xC0;
break;
case 'D':
temp += 0xD0;
break;
case 'E':
temp += 0xE0;
break;
case 'F':
temp += 0xF0;
break;
default:
return 0;
}
switch (toupper(hex[1])) {
case '0':
break;
case '1':
temp += 0x01;
break;
case '2':
temp += 0x02;
break;
case '3':
temp += 0x03;
break;
case '4':
temp += 0x04;
break;
case '5':
temp += 0x05;
break;
case '6':
temp += 0x06;
break;
case '7':
temp += 0x07;
break;
case '8':
temp += 0x08;
break;
case '9':
temp += 0x09;
break;
case 'A':
temp += 0x0A;
break;
case 'B':
temp += 0x0B;
break;
case 'C':
temp += 0x0C;
break;
case 'D':
temp += 0x0D;
break;
case 'E':
temp += 0x0E;
break;
case 'F':
temp += 0x0F;
break;
default:
return 0;
}
*val = temp;
return 1;
}
static tristate
_hexcolor(PyObject *color, Uint8 rgba[])
{
size_t len;
tristate rcode = TRISTATE_FAIL;
char *name;
#if PY3
PyObject *ascii = PyUnicode_AsASCIIString(color);
if (ascii == NULL) {
rcode = TRISTATE_ERROR;
goto Fail;
}
name = PyBytes_AsString(ascii);
#else
name = PyString_AsString(color);
#endif
if (name == NULL) {
goto Fail;
}
len = strlen(name);
/* hex colors can be
* #RRGGBB
* #RRGGBBAA
* 0xRRGGBB
* 0xRRGGBBAA
*/
if (len < 7) {
goto Fail;
}
if (name[0] == '#') {
if (len != 7 && len != 9)
goto Fail;
if (!_hextoint(name + 1, &rgba[0]))
goto Fail;
if (!_hextoint(name + 3, &rgba[1]))
goto Fail;
if (!_hextoint(name + 5, &rgba[2]))
goto Fail;
rgba[3] = 255;
if (len == 9 && !_hextoint(name + 7, &rgba[3])) {
goto Fail;
}
goto Success;
}
else if (name[0] == '0' && name[1] == 'x') {
if (len != 8 && len != 10)
goto Fail;
if (!_hextoint(name + 2, &rgba[0]))
goto Fail;
if (!_hextoint(name + 4, &rgba[1]))
goto Fail;
if (!_hextoint(name + 6, &rgba[2]))
goto Fail;
rgba[3] = 255;
if (len == 10 && !_hextoint(name + 8, &rgba[3])) {
goto Fail;
}
goto Success;
}
goto Fail;
Success:
rcode = TRISTATE_SUCCESS;
Fail:
#if PY3
Py_XDECREF(ascii);
#endif
return rcode;
}
static int
_coerce_obj(PyObject *obj, Uint8 rgba[])
{
if (PyType_IsSubtype(obj->ob_type, &pgColor_Type)) {
rgba[0] = ((pgColorObject *)obj)->data[0];
rgba[1] = ((pgColorObject *)obj)->data[1];
rgba[2] = ((pgColorObject *)obj)->data[2];
rgba[3] = ((pgColorObject *)obj)->data[3];
return 1;
}
else if (PyType_IsSubtype(obj->ob_type, &PyTuple_Type)) {
if (pg_RGBAFromObj(obj, rgba)) {
return 1;
}
else if (PyErr_Occurred()) {
return -1;
}
}
return 0;
}
static pgColorObject *
_color_new_internal(PyTypeObject *type, const Uint8 rgba[])
{
/* default length of 4 - r,g,b,a. */
return _color_new_internal_length(type, rgba, 4);
}
static pgColorObject *
_color_new_internal_length(PyTypeObject *type, const Uint8 rgba[],
Uint8 length)
{
pgColorObject *color = (pgColorObject *)type->tp_alloc(type, 0);
if (!color) {
return NULL;
}
color->data[0] = rgba[0];
color->data[1] = rgba[1];
color->data[2] = rgba[2];
color->data[3] = rgba[3];
color->len = length;
return color;
}
/**
* Creates a new pgColorObject.
*/
static PyObject *
_color_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
static const Uint8 DEFAULT_RGBA[4] = {0, 0, 0, 255};
return (PyObject *)_color_new_internal_length(type, DEFAULT_RGBA, 4);
}
static int
_color_init(pgColorObject *self, PyObject *args, PyObject *kwds)
{
Uint8 *rgba = self->data;
PyObject *obj;
PyObject *obj1 = NULL;
PyObject *obj2 = NULL;
PyObject *obj3 = NULL;
if (!PyArg_ParseTuple(args, "O|OOO", &obj, &obj1, &obj2, &obj3)) {
return -1;
}
if (Text_Check(obj) || PyUnicode_Check(obj)) {
/* Named color */
PyObject *color = NULL;
PyObject *name1 = NULL, *name2 = NULL;
if (obj1 || obj2 || obj3) {
RAISE(PyExc_ValueError, "invalid arguments");
return -1;
}
name1 = PyObject_CallMethod(obj, "replace", "(ss)", " ", "");
if (!name1) {
return -1;
}
name2 = PyObject_CallMethod(name1, "lower", NULL);
Py_DECREF(name1);
if (!name2) {
return -1;
}
color = PyDict_GetItem(_COLORDICT, name2);
Py_DECREF(name2);
if (!color) {
switch (_hexcolor(obj, rgba)) {
case TRISTATE_FAIL:
RAISE(PyExc_ValueError, "invalid color name");
return -1;
case TRISTATE_ERROR:
return -1;
default:
break;
}
}
else if (!pg_RGBAFromObj(color, rgba)) {
RAISE(PyExc_ValueError, "invalid color");
return -1;
}
}
else if (!obj1) {
/* Single integer color value or tuple */
Uint32 color;
if (_get_color(obj, &color)) {
rgba[0] = (Uint8)(color >> 24);
rgba[1] = (Uint8)(color >> 16);
rgba[2] = (Uint8)(color >> 8);
rgba[3] = (Uint8)color;
}
else if (!pg_RGBAFromObj(obj, rgba)) {
RAISE(PyExc_ValueError, "invalid argument");
return -1;
}
else {
RAISE(PyExc_ValueError, "invalid argument");
return -1;
}
}
else {
Uint32 color = 0;
/* Color(R,G,B[,A]) */
if (!_get_color(obj, &color) || color > 255) {
RAISE(PyExc_ValueError, "invalid color argument");
return -1;
}
rgba[0] = (Uint8)color;
if (!_get_color(obj1, &color) || color > 255) {
RAISE(PyExc_ValueError, "invalid color argument");
return -1;
}
rgba[1] = (Uint8)color;
if (!obj2 || !_get_color(obj2, &color) || color > 255) {
RAISE(PyExc_ValueError, "invalid color argument");
return -1;
}
rgba[2] = (Uint8)color;
if (obj3) {
if (!_get_color(obj3, &color) || color > 255) {
RAISE(PyExc_ValueError, "invalid color argument");
return -1;
}
rgba[3] = (Uint8)color;
}
else { /* No alpha */
rgba[3] = 255;
}
}
self->len = 4;
return 0;
}
/**
* Deallocates the pgColorObject.
*/
static void
_color_dealloc(pgColorObject *color)
{
Py_TYPE(color)->tp_free((PyObject *)color);
}
/**
* repr(color)
*/
static PyObject *
_color_repr(pgColorObject *color)
{
/* Max. would be(255, 255, 255, 255) */
char buf[21];
PyOS_snprintf(buf, sizeof(buf), "(%d, %d, %d, %d)", color->data[0],
color->data[1], color->data[2], color->data[3]);
return Text_FromUTF8(buf);
}
/**
* color.normalize()
*/
static PyObject *
_color_normalize(pgColorObject *color)
{
double rgba[4];
rgba[0] = color->data[0] / 255.0;
rgba[1] = color->data[1] / 255.0;
rgba[2] = color->data[2] / 255.0;
rgba[3] = color->data[3] / 255.0;
return Py_BuildValue("(ffff)", rgba[0], rgba[1], rgba[2], rgba[3]);
}
/**
* color.correct_gamma(x)
*/
static PyObject *
_color_correct_gamma(pgColorObject *color, PyObject *args)
{
double frgba[4];
Uint8 rgba[4];
double _gamma;
if (!PyArg_ParseTuple(args, "d", &_gamma)) {
return NULL;
}
frgba[0] = pow(color->data[0] / 255.0, _gamma);
frgba[1] = pow(color->data[1] / 255.0, _gamma);
frgba[2] = pow(color->data[2] / 255.0, _gamma);
frgba[3] = pow(color->data[3] / 255.0, _gamma);
/* visual studio doesn't have a round func, so doing it with +.5 and
* truncaction */
rgba[0] = (frgba[0] > 1.0)
? 255
: ((frgba[0] < 0.0) ? 0 : (Uint8)(frgba[0] * 255 + .5));
rgba[1] = (frgba[1] > 1.0)
? 255
: ((frgba[1] < 0.0) ? 0 : (Uint8)(frgba[1] * 255 + .5));
rgba[2] = (frgba[2] > 1.0)
? 255
: ((frgba[2] < 0.0) ? 0 : (Uint8)(frgba[2] * 255 + .5));
rgba[3] = (frgba[3] > 1.0)
? 255
: ((frgba[3] < 0.0) ? 0 : (Uint8)(frgba[3] * 255 + .5));
return (PyObject *)_color_new_internal(Py_TYPE(color), rgba);
}
/**
* color.r
*/
static PyObject *
_color_get_r(pgColorObject *color, void *closure)
{
return PyInt_FromLong(color->data[0]);
}
/**
* color.r = x
*/
static int
_color_set_r(pgColorObject *color, PyObject *value, void *closure)
{
Uint32 c;
if (!_get_color(value, &c)) {
return -1;
}
if (c > 255) {
PyErr_SetString(PyExc_ValueError, "color exceeds allowed range");
return -1;
}
color->data[0] = c;
return 0;
}
/**
* color.g
*/
static PyObject *
_color_get_g(pgColorObject *color, void *closure)
{
return PyInt_FromLong(color->data[1]);
}
/**
* color.g = x
*/
static int
_color_set_g(pgColorObject *color, PyObject *value, void *closure)
{
Uint32 c;
if (!_get_color(value, &c)) {
return -1;
}
if (c > 255) {
PyErr_SetString(PyExc_ValueError, "color exceeds allowed range");
return -1;
}
color->data[1] = c;
return 0;
}
/**
* color.b
*/
static PyObject *
_color_get_b(pgColorObject *color, void *closure)
{
return PyInt_FromLong(color->data[2]);
}
/**
* color.b = x
*/
static int
_color_set_b(pgColorObject *color, PyObject *value, void *closure)
{
Uint32 c;
if (!_get_color(value, &c)) {
return -1;
}
if (c > 255) {
PyErr_SetString(PyExc_ValueError, "color exceeds allowed range");
return -1;
}
color->data[2] = c;
return 0;
}
/**
* color.a
*/
static PyObject *
_color_get_a(pgColorObject *color, void *closure)
{
return PyInt_FromLong(color->data[3]);
}
/**
* color.a = x
*/
static int
_color_set_a(pgColorObject *color, PyObject *value, void *closure)
{
Uint32 c;
if (!_get_color(value, &c)) {
return -1;
}
if (c > 255) {
PyErr_SetString(PyExc_ValueError, "color exceeds allowed range");
return -1;
}
color->data[3] = c;
return 0;
}
/**
* color.hsva
*/
static PyObject *
_color_get_hsva(pgColorObject *color, void *closure)
{
double hsv[3] = {0, 0, 0};
double frgb[4];
double minv, maxv, diff;
/* Normalize */
frgb[0] = color->data[0] / 255.0;
frgb[1] = color->data[1] / 255.0;
frgb[2] = color->data[2] / 255.0;
frgb[3] = color->data[3] / 255.0;
maxv = MAX(MAX(frgb[0], frgb[1]), frgb[2]);
minv = MIN(MIN(frgb[0], frgb[1]), frgb[2]);
diff = maxv - minv;
/* Calculate V */
hsv[2] = 100. * maxv;
if (maxv == minv) {
hsv[0] = 0;
hsv[1] = 0;
return Py_BuildValue("(ffff)", hsv[0], hsv[1], hsv[2], frgb[3] * 100);
}
/* Calculate S */
hsv[1] = 100. * (maxv - minv) / maxv;
/* Calculate H */
if (maxv == frgb[0]) {
hsv[0] = fmod((60 * ((frgb[1] - frgb[2]) / diff)), 360.f);
}
else if (maxv == frgb[1]) {
hsv[0] = (60 * ((frgb[2] - frgb[0]) / diff)) + 120.f;
}
else {
hsv[0] = (60 * ((frgb[0] - frgb[1]) / diff)) + 240.f;
}
if (hsv[0] < 0) {
hsv[0] += 360.f;
}
/* H,S,V,A */
return Py_BuildValue("(ffff)", hsv[0], hsv[1], hsv[2], frgb[3] * 100);
}
static int
_color_set_hsva(pgColorObject *color, PyObject *value, void *closure)
{