/
aggdraw.cxx
2255 lines (1929 loc) · 59.3 KB
/
aggdraw.cxx
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/*
* AGG Draw Library
*
* WCK-style drawing using the AGG library.
*
* history:
* 2004-09-14 fl created, based on experimental code
* 2004-09-15 fl added pen/brush objects (from ironpil), multiple modes
* 2004-09-16 fl added text, arc/ellipse support
* 2005-03-25 fl added BGRA support
* 2005-05-02 fl added (experimental) symbol support
* 2005-05-12 fl added image constructor and flush method
* 2005-05-18 fl fixed possible image constructor crash
* 2005-05-18 fl make sure to keep a reference to the image
* 2005-05-19 fl improved symbol path support
* 2005-06-12 fl added support for S and T path operators
* 2005-06-15 fl added support for outline fonts
* 2005-06-15 fl support settransform for basic primitives and text
* 2005-06-19 fl use ImageColor.getrgb to resolve colors
* 2005-06-30 fl added Path object (stub)
* 2005-07-04 fl added Path methods (moveto, lineto, etc)
* 2005-07-05 fl added Path support to the line and polygon primitives
* 2005-08-10 fl fixed Draw(im) buffer memory leak (ouch!)
* 2005-08-20 fl fixed background color setting for RGB modes
* 2005-08-30 fl expand polygons by 0.5 pixels by default (experimental)
* 2005-08-30 fl fixed proper clipping in rasterizer
* 2005-09-23 fl added antialias setting
* 2005-09-24 fl don't recreate draw adaptor for each operation
* 2005-09-26 fl added coords method to Path type
* 2005-10-10 fl fixed broken add_path calls in symbol renderer (1.1)
* 2005-10-19 fl added native Windows support (via the Dib factory)
* 2005-10-20 fl added clear method
* 2005-10-23 fl support either hdc or hwnd in expose
* 2006-02-12 fl fixed crashes in type(obj) and path constructor
*
* Copyright (c) 2003-2006 by Secret Labs AB
*
* 2015-07-15 ej fixed broken paths
* 2017-01-03 ej added support for python 3
* 2017-01-03 ej tostring() -> tobytes(), fromstring() -> frombytes()
* 2017-08-18 dh fixed mode to be python str instead of bytes
* 2017-08-18 dh fixed a couple compiler warnings (specifically clang)
* 2018-04-21 dh fixed python 2 compatibility in getcolor
*
* Copyright (c) 2011-2017 by AggDraw Developers
*
*/
#define Q(x) #x
#define QUOTE(x) Q(x)
#if defined(_MSC_VER)
#define WINDOWS_LEAN_AND_MEAN
#include <windows.h>
#endif
#ifndef M_PI
#define M_PI 3.1415926535897931
#endif
#include "Python.h"
#if PY_MAJOR_VERSION >= 3
#define IS_PY3K
#define HAVE_UNICODE
#endif
#include "bytesobject.h"
#if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x01060000
#if PY_VERSION_HEX < 0x02020000 || defined(Py_USING_UNICODE)
/* defining this enables unicode support (default under 1.6a1 and later) */
#define HAVE_UNICODE
#endif
#endif
/* agg2 components */
#include "agg_arc.h"
#include "agg_conv_contour.h"
#include "agg_conv_curve.h"
// #include "agg_conv_dash.h"
#include "agg_conv_stroke.h"
#include "agg_conv_transform.h"
#include "agg_ellipse.h"
#if defined(HAVE_FREETYPE2)
#include "agg_font_freetype.h"
#endif
#include "agg_path_storage.h"
#include "agg_pixfmt_gray8.h"
#include "agg_pixfmt_rgb24.h"
#include "agg_pixfmt_rgba32.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_renderer_scanline.h"
#include "agg_rendering_buffer.h"
#include "agg_scanline_p.h"
#include "platform/agg_platform_support.h" // agg::pix_format_*
/* -------------------------------------------------------------------- */
/* AGG Drawing Surface */
#if defined(HAVE_FREETYPE2)
typedef agg::font_engine_freetype_int32 font_engine_type;
typedef agg::font_cache_manager<font_engine_type> font_manager_type;
static font_engine_type font_engine;
static font_manager_type font_manager(font_engine);
#endif
/* forward declaration */
class draw_adaptor_base;
template<class PixFmt> class draw_adaptor;
typedef struct {
PyObject_HEAD
draw_adaptor_base *draw;
agg::rendering_buffer* buffer;
agg::trans_affine* transform;
unsigned char* buffer_data;
int mode; // agg::pix_format_*
int xsize, ysize;
int buffer_size;
PyObject* image;
PyObject* background;
#if defined(WIN32)
HDC dc;
HBITMAP bitmap;
HGDIOBJ old_bitmap;
BITMAPINFO info;
#endif
} DrawObject;
#ifndef Py_TYPE
#define Py_TYPE(ob) (((PyObject*)(ob))->ob_type)
#endif
/* glue functions (see the init function for details) */
static PyObject* aggdraw_getcolor_obj;
static void draw_dealloc(DrawObject* self);
#ifdef IS_PY3K
static PyObject* draw_getattro(DrawObject* self, PyObject* nameobj);
static PyTypeObject DrawType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Draw", sizeof(DrawObject), 0,
/* methods */
(destructor) draw_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash*/
0, /* tp_call*/
0, /* tp_str*/
(getattrofunc)draw_getattro, /* tp_getattro */
};
#else
static PyObject* draw_getattr(DrawObject* self, char* name);
static PyTypeObject DrawType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Draw", sizeof(DrawObject), 0,
/* methods */
(destructor) draw_dealloc, /* tp_dealloc */
(printfunc)0, /* tp_print */
(getattrfunc)draw_getattr, /* tp_getattr */
0, /* tp_setattr */
};
#endif
typedef struct {
PyObject_HEAD
agg::rgba8 color;
float width;
} PenObject;
static void pen_dealloc(PenObject* self);
#ifdef IS_PY3K
static PyTypeObject PenType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Pen", sizeof(PenObject), 0,
/* methods */
(destructor) pen_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
};
#else
static PyTypeObject PenType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Pen", sizeof(PenObject), 0,
/* methods */
(destructor) pen_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
};
#endif
#define Pen_Check(op) ((op) != NULL && Py_TYPE(op) == &PenType)
typedef struct {
PyObject_HEAD
agg::rgba8 color;
} BrushObject;
static void brush_dealloc(BrushObject* self);
#ifdef IS_PY3K
static PyTypeObject BrushType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Brush", sizeof(BrushObject), 0,
/* methods */
(destructor) brush_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
};
#else
static PyTypeObject BrushType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Brush", sizeof(BrushObject), 0,
/* methods */
(destructor) brush_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
};
#endif
#define Brush_Check(op) ((op) != NULL && Py_TYPE(op) == &BrushType)
typedef struct {
PyObject_HEAD
char* filename;
float height;
agg::rgba8 color;
} FontObject;
#if defined(HAVE_FREETYPE2)
static FT_Face font_load(FontObject* font, bool outline=false);
#endif
static void font_dealloc(FontObject* self);
#ifdef IS_PY3K
static PyObject* font_getattro(FontObject* self, PyObject* nameobj);
static PyTypeObject FontType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Font", sizeof(FontObject), 0,
/* methods */
(destructor) font_dealloc, /* tp_dealloc */
(printfunc)0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
(reprfunc)0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
(hashfunc)0, /*tp_hash*/
(ternaryfunc)0, /*tp_call*/
(reprfunc)0, /*tp_str*/
(getattrofunc)font_getattro, /* tp_getattro */
};
#else
static PyObject* font_getattr(FontObject* self, char* name);
static PyTypeObject FontType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Font", sizeof(FontObject), 0,
/* methods */
(destructor) font_dealloc, /* tp_dealloc */
0, /* tp_print */
(getattrfunc) font_getattr, /* tp_getattr */
0, /* tp_setattr */
};
#endif
#define Font_Check(op) ((op) != NULL && Py_TYPE(op) == &FontType)
typedef struct {
PyObject_HEAD
agg::path_storage* path;
} PathObject;
static void path_dealloc(PathObject* self);
#ifdef IS_PY3K
static PyObject* path_getattro(PathObject* self, PyObject* nameobj);
static PyTypeObject PathType = {
PyVarObject_HEAD_INIT(NULL, 0)
"Path", sizeof(PathObject), 0,
/* methods */
(destructor) path_dealloc, /* tp_dealloc */
(printfunc)0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
(reprfunc)0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
(hashfunc)0, /*tp_hash*/
(ternaryfunc)0, /*tp_call*/
(reprfunc)0, /*tp_str*/
(getattrofunc)path_getattro, /* tp_getattro */
};
#else
static PyObject* path_getattr(PathObject* self, char* name);
static PyTypeObject PathType = {
PyObject_HEAD_INIT(NULL)
0, "Path", sizeof(PathObject), 0,
/* methods */
(destructor) path_dealloc, /* tp_dealloc */
0, /* tp_print */
(getattrfunc) path_getattr, /* tp_getattr */
0, /* tp_setattr */
};
#endif
#define Path_Check(op) ((op) != NULL && Py_TYPE(op) == &PathType)
static agg::rgba8 getcolor(PyObject* color, int opacity=255);
/* -------------------------------------------------------------------- */
#if defined(HAVE_FREETYPE2)
static int
text_getchar(PyObject* string, int index, unsigned long* char_out)
{
#if defined(HAVE_UNICODE)
if (PyUnicode_Check(string)) {
Py_UNICODE* p = PyUnicode_AS_UNICODE(string);
int size = PyUnicode_GET_SIZE(string);
if (index >= size)
return 0;
*char_out = p[index];
return 1;
}
#endif
if (PyBytes_Check(string)) {
unsigned char* p = (unsigned char*) PyBytes_AS_STRING(string);
int size = PyBytes_GET_SIZE(string);
if (index >= size)
return 0;
*char_out = (unsigned char) p[index];
return 1;
}
return 0;
}
#endif
/* This template class is used to automagically instantiate drawing
code for all pixel formats used by the library. */
class draw_adaptor_base
{
public:
const char* mode;
virtual ~draw_adaptor_base() {};
virtual void setantialias(bool flag) = 0;
virtual void draw(agg::path_storage &path, PyObject* obj1,
PyObject* obj2=NULL) = 0;
virtual void drawtext(float xy[2], PyObject* text, FontObject* font) {};
};
template<class PixFmt> class draw_adaptor : public draw_adaptor_base {
DrawObject* self;
typedef agg::renderer_base<PixFmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_aa;
agg::rasterizer_scanline_aa<> rasterizer;
agg::scanline_p8 scanline;
public:
draw_adaptor(DrawObject* self_, const char* mode_)
{
self = self_;
mode = mode_;
setantialias(true);
rasterizer.clip_box(0,0, self->xsize, self->ysize);
}
void setantialias(bool flag)
{
if (flag)
rasterizer.gamma(agg::gamma_linear());
else
rasterizer.gamma(agg::gamma_threshold(0.5));
};
void draw(agg::path_storage &path, PyObject* obj1, PyObject* obj2=NULL)
{
PixFmt pf(*self->buffer);
renderer_base rb(pf);
renderer_aa renderer(rb);
agg::path_storage* p;
PenObject* pen;
if (Pen_Check(obj1))
pen = (PenObject*) obj1;
else if (Pen_Check(obj2))
pen = (PenObject*) obj2;
else
pen = NULL;
BrushObject* brush;
if (Brush_Check(obj2))
brush = (BrushObject*) obj2;
else if (Brush_Check(obj1))
brush = (BrushObject*) obj1;
else
brush = NULL;
if (self->transform) {
p = new agg::path_storage();
agg::conv_transform<agg::path_storage, agg::trans_affine>
tp(path, *self->transform);
p->add_path(tp, 0, false);
} else
p = &path;
if (brush) {
/* interior */
agg::conv_contour<agg::path_storage> contour(*p);
contour.auto_detect_orientation(true);
if (pen)
contour.width(pen->width / 2.0);
else
contour.width(0.5);
rasterizer.reset();
rasterizer.add_path(contour);
renderer.color(brush->color);
agg::render_scanlines(rasterizer, scanline, renderer);
}
if (pen) {
/* outline */
/* FIXME: add path for dashed lines */
agg::conv_stroke<agg::path_storage> stroke(*p);
stroke.width(pen->width);
rasterizer.reset();
rasterizer.add_path(stroke);
renderer.color(pen->color);
agg::render_scanlines(rasterizer, scanline, renderer);
}
if (self->transform)
delete p;
}
#if defined(HAVE_FREETYPE2)
void drawtext(float xy[2], PyObject* text, FontObject* font)
{
PixFmt pf(*self->buffer);
renderer_base rb(pf);
renderer_aa renderer(rb);
typedef agg::conv_curve<font_manager_type::path_adaptor_type> curve_t;
curve_t curves(font_manager.path_adaptor());
bool outline = (self->transform != NULL);
FT_Face face = font_load(font, outline);
if (!face)
return;
double x = xy[0];
double y = xy[1] + face->size->metrics.ascender/64.0;
renderer.color(font->color);
curves.approximation_scale(1);
unsigned long ch;
int index = 0;
while (text_getchar(text, index, &ch)) {
const agg::glyph_cache* glyph;
glyph = font_manager.glyph(ch);
if (!glyph)
continue;
font_manager.add_kerning(&x, &y);
font_manager.init_embedded_adaptors(glyph, x, y);
if (outline) {
rasterizer.reset();
if (self->transform) {
agg::conv_transform<curve_t, agg::trans_affine>
tp(curves, *self->transform);
rasterizer.add_path(tp);
} else
rasterizer.add_path(curves);
agg::render_scanlines(rasterizer, scanline, renderer);
} else {
agg::render_scanlines(
font_manager.gray8_adaptor(),
font_manager.gray8_scanline(), renderer
);
}
x += glyph->advance_x;
y += glyph->advance_y;
index++;
}
}
#endif
};
/* -------------------------------------------------------------------- */
static void clear(DrawObject* self, PyObject* background)
{
if (background && background != Py_None) {
agg::rgba8 ink = getcolor(background);
unsigned char* p = self->buffer_data;
int c, i;
switch (self->mode) {
case agg::pix_format_gray8:
c = (ink.r*299 + ink.g*587 + ink.b*114) / 1000;
memset(self->buffer_data, c, self->buffer_size);
break;
case agg::pix_format_rgb24:
for (i = 0; i < self->buffer_size; i += 3) {
p[i+0] = ink.r;
p[i+1] = ink.g;
p[i+2] = ink.b;
}
break;
case agg::pix_format_bgr24:
for (i = 0; i < self->buffer_size; i += 3) {
p[i+0] = ink.b;
p[i+1] = ink.g;
p[i+2] = ink.r;
}
break;
case agg::pix_format_rgba32:
for (i = 0; i < self->buffer_size; i += 4) {
p[i+0] = ink.r;
p[i+1] = ink.g;
p[i+2] = ink.b;
p[i+3] = ink.a;
}
break;
case agg::pix_format_bgra32:
for (i = 0; i < self->buffer_size; i += 4) {
p[i+0] = ink.b;
p[i+1] = ink.g;
p[i+2] = ink.r;
p[i+3] = ink.a;
}
break;
}
} else
memset(self->buffer_data, 255, self->buffer_size);
}
static void draw_setup(DrawObject* self)
{
switch (self->mode) {
case agg::pix_format_gray8:
self->draw = new draw_adaptor<agg::pixfmt_gray8>(self, "L");
break;
case agg::pix_format_rgb24:
self->draw = new draw_adaptor<agg::pixfmt_rgb24>(self, "RGB");
break;
case agg::pix_format_bgr24:
self->draw = new draw_adaptor<agg::pixfmt_bgr24>(self, "BGR");
break;
default:
self->draw = new draw_adaptor<agg::pixfmt_rgba32>(self, "RGBA");
break;
}
}
static PyObject*
draw_new(PyObject* self_, PyObject* args)
{
char buffer[10];
int ok;
PyObject* image;
char* mode;
int xsize, ysize;
PyObject* background = NULL;
if (PyArg_ParseTuple(args, "O:Draw", &image)) {
/* get mode (use a local buffer to avoid GC issues) */
PyObject* mode_obj = PyObject_GetAttrString(image, "mode");
if (!mode_obj)
return NULL;
if (PyBytes_Check(mode_obj)) {
strncpy(buffer, PyBytes_AS_STRING(mode_obj), sizeof buffer);
buffer[sizeof(buffer)-1] = '\0'; /* to be on the safe side */
mode = buffer;
} else if (PyUnicode_Check(mode_obj)) {
PyObject* ascii_mode = PyUnicode_AsASCIIString(mode_obj);
if (ascii_mode == NULL) {
mode = NULL;
} else {
strncpy(buffer, PyBytes_AsString(ascii_mode), sizeof buffer);
buffer[sizeof(buffer)-1] = '\0'; /* to be on the safe side */
mode = buffer;
Py_XDECREF(ascii_mode);
}
} else
mode = NULL;
Py_DECREF(mode_obj);
if (!mode) {
PyErr_SetString(
PyExc_TypeError,
"bad 'mode' attribute (expected string)"
);
return NULL;
}
PyObject* size_obj = PyObject_GetAttrString(image, "size");
if (!size_obj)
return NULL;
if (PyTuple_Check(size_obj))
ok = PyArg_ParseTuple(size_obj, "ii", &xsize, &ysize);
else {
PyErr_SetString(
PyExc_TypeError,
"bad 'size' attribute (expected 2-tuple)"
);
ok = 0;
}
Py_DECREF(size_obj);
if (!ok)
return NULL;
} else {
PyErr_Clear();
if (!PyArg_ParseTuple(args, "s(ii)|O:Draw",
&mode, &xsize, &ysize, &background))
return NULL;
image = NULL;
}
DrawObject* self = PyObject_NEW(DrawObject, &DrawType);
if (self == NULL)
return NULL;
int stride;
if (!strcmp(mode, "L")) {
self->mode = agg::pix_format_gray8;
stride = xsize;
} else if (!strcmp(mode, "RGB")) {
self->mode = agg::pix_format_rgb24;
stride = xsize * 3;
} else if (!strcmp(mode, "BGR")) {
self->mode = agg::pix_format_bgr24;
stride = xsize * 3;
} else if (!strcmp(mode, "RGBA")) {
self->mode = agg::pix_format_rgba32;
stride = xsize * 4;
} else if (!strcmp(mode, "BGRA")) {
self->mode = agg::pix_format_bgra32;
stride = xsize * 4;
} else {
PyErr_SetString(PyExc_ValueError, "bad mode");
PyObject_DEL(self);
return NULL;
}
self->buffer_size = ysize * stride;
self->buffer_data = new unsigned char[self->buffer_size];
Py_XINCREF(background);
self->background = background;
clear(self, background);
self->buffer = new agg::rendering_buffer(
self->buffer_data, xsize, ysize, stride
);
self->xsize = xsize;
self->ysize = ysize;
self->transform = NULL;
self->image = image;
if (image) {
PyObject* buffer = PyObject_CallMethod(image, "tobytes", NULL);
if (!buffer)
return NULL; /* FIXME: release resources */
if (!PyBytes_Check(buffer)) {
PyErr_SetString(
PyExc_TypeError,
"bad 'tobytes' return value (expected string)"
);
Py_DECREF(buffer);
return NULL;
}
char* data = PyBytes_AS_STRING(buffer);
int data_size = PyBytes_GET_SIZE(buffer);
if (data_size >= self->buffer_size)
memcpy(self->buffer_data, data, self->buffer_size);
else {
PyErr_SetString(PyExc_ValueError, "not enough data");
Py_DECREF(buffer);
return NULL; /* FIXME: release resources */
}
Py_INCREF(image); /* hang on to this image */
Py_DECREF(buffer);
}
draw_setup(self);
#if defined(WIN32)
self->dc = NULL;
#endif
return (PyObject*) self;
}
#if defined(WIN32)
static PyObject*
draw_dib(PyObject* self_, PyObject* args)
{
char* mode;
int xsize, ysize;
PyObject* background = NULL;
if (!PyArg_ParseTuple(args, "s(ii)|O:Dib", &mode, &xsize, &ysize, &background))
return NULL;
DrawObject* self = PyObject_NEW(DrawObject, &DrawType);
if (self == NULL)
return NULL;
if (strcmp(mode, "RGB")) {
PyErr_SetString(PyExc_ValueError, "bad mode");
PyObject_DEL(self);
return NULL;
}
int stride = xsize * 3;
self->mode = agg::pix_format_bgr24;
memset(&self->info, 0, sizeof(BITMAPINFOHEADER));
self->info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
self->info.bmiHeader.biWidth = xsize;
self->info.bmiHeader.biHeight = ysize;
self->info.bmiHeader.biPlanes = 1;
self->info.bmiHeader.biBitCount = strlen(mode)*8;
self->info.bmiHeader.biCompression = BI_RGB;
/* Create DIB */
self->dc = CreateCompatibleDC(NULL);
if (!self->dc) {
/* FIXME: cleanup */
PyErr_NoMemory();
return NULL;
}
void* bits;
self->bitmap = CreateDIBSection(
self->dc, &self->info, DIB_RGB_COLORS, &bits, NULL, 0
);
if (!self->bitmap) {
/* FIXME: cleanup */
PyErr_NoMemory();
return NULL;
}
/* Bind the DIB to the device context */
self->old_bitmap = SelectObject(self->dc, self->bitmap);
self->buffer_size = ysize * stride;
self->buffer_data = (unsigned char*) bits;
Py_XINCREF(background);
self->background = background;
clear(self, background);
self->buffer = new agg::rendering_buffer(
self->buffer_data, xsize, ysize, -stride
);
self->xsize = xsize;
self->ysize = ysize;
self->transform = NULL;
self->image = NULL;
draw_setup(self);
return (PyObject*) self;
}
#endif
struct PointF {
float X;
float Y;
};
#ifdef IS_PY3K
#define GETFLOAT(op) \
(PyLong_Check(op) ? (float) PyLong_AS_LONG((op)) :\
PyFloat_Check(op) ? (float) PyFloat_AS_DOUBLE((op)) :\
(float) PyFloat_AsDouble(op))
#else
#define GETFLOAT(op) \
(PyInt_Check(op) ? (float) PyInt_AS_LONG((op)) :\
PyFloat_Check(op) ? (float) PyFloat_AS_DOUBLE((op)) :\
(float) PyFloat_AsDouble(op))
#endif
static PointF*
getpoints(PyObject* xyIn, int* count)
{
PointF *xy;
int i, n;
/* FIXME: use local buffer (provided by caller) for short
sequences */
if (!PySequence_Check(xyIn)) {
PyErr_SetString(PyExc_TypeError, "argument must be a sequence");
return NULL;
}
n = PyObject_Length(xyIn);
if (PyErr_Occurred())
return NULL;
if (n & 1) {
PyErr_SetString(PyExc_TypeError,
"expected even number of coordinates");
return NULL;
}
n /= 2;
xy = new PointF[n+1];
if (!xy) {
PyErr_NoMemory();
*count = -1;
return NULL;
}
if (PyList_Check(xyIn))
for (i = 0; i < n; i++) {
xy[i].X = GETFLOAT(PyList_GET_ITEM(xyIn, i+i));
xy[i].Y = GETFLOAT(PyList_GET_ITEM(xyIn, i+i+1));
}
else if (PyTuple_Check(xyIn))
for (i = 0; i < n; i++) {
xy[i].X = GETFLOAT(PyTuple_GET_ITEM(xyIn, i+i));
xy[i].Y = GETFLOAT(PyTuple_GET_ITEM(xyIn, i+i+1));
}
else
for (i = 0; i < n; i++) {
PyObject *op;
op = PySequence_GetItem(xyIn, i+i);
xy[i].X = GETFLOAT(op);
Py_DECREF(op);
op = PySequence_GetItem(xyIn, i+i+1);
xy[i].Y = GETFLOAT(op);
Py_DECREF(op);
}
PyErr_Clear();
*count = n;
return xy;
}
static agg::rgba8
getcolor(PyObject* color, int opacity)
{
#ifdef IS_PY3K
if (PyLong_Check(color)) {
int ink = PyLong_AsLong(color);
return agg::rgba8(ink, ink, ink, opacity);
}
#else
if (PyInt_Check(color)) {
int ink = PyInt_AsLong(color);
return agg::rgba8(ink, ink, ink, opacity);
}
#endif
char buffer[10];
char* ink = NULL;
if (PyUnicode_Check(color)) {
PyObject* ascii_color = PyUnicode_AsASCIIString(color);
if (ascii_color == NULL) {
ink = NULL;
} else {
strncpy(buffer, PyBytes_AsString(ascii_color), sizeof buffer);
buffer[sizeof(buffer)-1] = '\0'; /* to be on the safe side */
ink = buffer;
Py_XDECREF(ascii_color);
}
} else if (PyBytes_Check(color)) {
ink = PyBytes_AsString(color);
}
/* hex colors */
if (ink && ink[0] == '#' && strlen(ink) == 7) {
int i = strtol(ink+1, NULL, 16); /* FIXME: rough parsing */
return agg::rgba8((i>>16)&255,(i>>8)&255,i&255,opacity);
}
int red, green, blue, alpha = opacity;
if (PyArg_ParseTuple(color, "iii|i", &red, &green, &blue, &alpha))
return agg::rgba8(red, green, blue, alpha);
PyErr_Clear();
/* unknown color: pass it to the Python layer */
if (aggdraw_getcolor_obj) {
PyObject* result;
result = PyObject_CallFunction(aggdraw_getcolor_obj, "O", color);
if (result) {
int ok = PyArg_ParseTuple(result, "iii", &red, &green, &blue);
Py_DECREF(result);
if (ok)
return agg::rgba8(red, green, blue, opacity);
}
PyErr_Clear();
}
/* check for well-known color names (HTML) */
if (PyUnicode_Check(color) || PyBytes_Check(color)) {
if (!strcmp(ink, "aqua"))
return agg::rgba8(0x00,0xFF,0xFF,opacity);
if (!strcmp(ink, "black"))
return agg::rgba8(0x00,0x00,0x00,opacity);
if (!strcmp(ink, "blue"))
return agg::rgba8(0x00,0x00,0xFF,opacity);
if (!strcmp(ink, "fuchsia"))
return agg::rgba8(0xFF,0x00,0xFF,opacity);
if (!strcmp(ink, "gray"))
return agg::rgba8(0x80,0x80,0x80,opacity);
if (!strcmp(ink, "green"))
return agg::rgba8(0x00,0x80,0x00,opacity);
if (!strcmp(ink, "lime"))
return agg::rgba8(0x00,0xFF,0x00,opacity);
if (!strcmp(ink, "maroon"))
return agg::rgba8(0x80,0x00,0x00,opacity);
if (!strcmp(ink, "navy"))
return agg::rgba8(0x00,0x00,0x80,opacity);
if (!strcmp(ink, "olive"))
return agg::rgba8(0x80,0x80,0x00,opacity);
if (!strcmp(ink, "purple"))
return agg::rgba8(0x80,0x00,0x80,opacity);
if (!strcmp(ink, "red"))
return agg::rgba8(0xFF,0x00,0x00,opacity);
if (!strcmp(ink, "silver"))
return agg::rgba8(0xC0,0xC0,0xC0,opacity);
if (!strcmp(ink, "teal"))
return agg::rgba8(0x00,0x80,0x80,opacity);
if (!strcmp(ink, "white"))
return agg::rgba8(0xFF,0xFF,0xFF,opacity);
if (!strcmp(ink, "yellow"))
return agg::rgba8(0xFF,0xFF,0x00,opacity);
/* extra colors (used by test2d.py) */
if (!strcmp(ink, "gold"))
return agg::rgba8(0xFF,0xD7,0x00,opacity);
}
/* default to black (FIXME: raise an exception instead?) */
return agg::rgba8(0, 0, 0, opacity);
}
/* -------------------------------------------------------------------- */
static PyObject*
draw_arc(DrawObject* self, PyObject* args)
{
float x0, y0, x1, y1;
float start, end;
PyObject* pen = NULL;
if (!PyArg_ParseTuple(args, "(ffff)ff|O:arc",
&x0, &y0, &x1, &y1, &start, &end, &pen))
return NULL;
agg::path_storage path;
agg::arc arc(
(x1+x0)/2, (y1+y0)/2, (x1-x0)/2, (y1-y0)/2,
-start * (float) (M_PI / 180.0), -end * (float) (M_PI / 180.0),
false
);
arc.approximation_scale(1);
path.add_path(arc);
self->draw->draw(path, pen);
Py_INCREF(Py_None);
return Py_None;