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_macosx.m
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#include <Cocoa/Cocoa.h>
#include <ApplicationServices/ApplicationServices.h>
#include <sys/socket.h>
#include <Python.h>
#include "numpy/arrayobject.h"
#include "path_cleanup.h"
#if PY_MAJOR_VERSION >= 3
#define PY3K 1
#else
#define PY3K 0
#endif
#if (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >=3)
#define PY33 1
#else
#define PY33 0
#endif
/* Must define Py_TYPE for Python 2.5 or older */
#ifndef Py_TYPE
# define Py_TYPE(o) ((o)->ob_type)
#endif
/* Must define PyVarObject_HEAD_INIT for Python 2.5 or older */
#ifndef PyVarObject_HEAD_INIT
#define PyVarObject_HEAD_INIT(type, size) \
PyObject_HEAD_INIT(type) size,
#endif
/* Proper way to check for the OS X version we are compiling for, from
http://developer.apple.com/documentation/DeveloperTools/Conceptual/cross_development */
#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
#define COMPILING_FOR_10_5
#endif
#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
#define COMPILING_FOR_10_6
#endif
static int nwin = 0; /* The number of open windows */
/* Use Atsui for Mac OS X 10.4, CoreText for Mac OS X 10.5 */
#ifndef COMPILING_FOR_10_5
static int ngc = 0; /* The number of graphics contexts in use */
/* For drawing Unicode strings with ATSUI */
static ATSUStyle style = NULL;
static ATSUTextLayout layout = NULL;
#endif
/* CGFloat was defined in Mac OS X 10.5 */
#ifndef CGFLOAT_DEFINED
#define CGFloat float
#endif
/* Various NSApplicationDefined event subtypes */
#define STDIN_READY 0
#define SIGINT_CALLED 1
#define STOP_EVENT_LOOP 2
#define WINDOW_CLOSING 3
/* Path definitions */
#define STOP 0
#define MOVETO 1
#define LINETO 2
#define CURVE3 3
#define CURVE4 4
#define CLOSEPOLY 0x4f
/* Hatching */
#define HATCH_SIZE 72
/* -------------------------- Helper function ---------------------------- */
static void stdin_ready(CFReadStreamRef readStream, CFStreamEventType eventType, void* context)
{
NSEvent* event = [NSEvent otherEventWithType: NSApplicationDefined
location: NSZeroPoint
modifierFlags: 0
timestamp: 0.0
windowNumber: 0
context: nil
subtype: STDIN_READY
data1: 0
data2: 0];
[NSApp postEvent: event atStart: true];
}
static int sigint_fd = -1;
static void _sigint_handler(int sig)
{
const char c = 'i';
write(sigint_fd, &c, 1);
}
static void _callback(CFSocketRef s,
CFSocketCallBackType type,
CFDataRef address,
const void * data,
void *info)
{
char c;
CFSocketNativeHandle handle = CFSocketGetNative(s);
read(handle, &c, 1);
NSEvent* event = [NSEvent otherEventWithType: NSApplicationDefined
location: NSZeroPoint
modifierFlags: 0
timestamp: 0.0
windowNumber: 0
context: nil
subtype: SIGINT_CALLED
data1: 0
data2: 0];
[NSApp postEvent: event atStart: true];
}
static int wait_for_stdin(void)
{
const UInt8 buffer[] = "/dev/fd/0";
const CFIndex n = (CFIndex)strlen((char*)buffer);
CFRunLoopRef runloop = CFRunLoopGetCurrent();
CFURLRef url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault,
buffer,
n,
false);
CFReadStreamRef stream = CFReadStreamCreateWithFile(kCFAllocatorDefault,
url);
CFRelease(url);
CFReadStreamOpen(stream);
if (!CFReadStreamHasBytesAvailable(stream))
/* This is possible because of how PyOS_InputHook is called from Python */
{
int error;
int interrupted = 0;
int channel[2];
CFSocketRef sigint_socket = NULL;
PyOS_sighandler_t py_sigint_handler = NULL;
CFStreamClientContext clientContext = {0, NULL, NULL, NULL, NULL};
CFReadStreamSetClient(stream,
kCFStreamEventHasBytesAvailable,
stdin_ready,
&clientContext);
CFReadStreamScheduleWithRunLoop(stream, runloop, kCFRunLoopCommonModes);
error = pipe(channel);
if (error==0)
{
fcntl(channel[1], F_SETFL, O_WRONLY | O_NONBLOCK);
sigint_socket = CFSocketCreateWithNative(kCFAllocatorDefault,
channel[0],
kCFSocketReadCallBack,
_callback,
NULL);
if (sigint_socket)
{
CFRunLoopSourceRef source;
source = CFSocketCreateRunLoopSource(kCFAllocatorDefault,
sigint_socket,
0);
CFRelease(sigint_socket);
if (source)
{
CFRunLoopAddSource(runloop, source, kCFRunLoopDefaultMode);
CFRelease(source);
sigint_fd = channel[1];
py_sigint_handler = PyOS_setsig(SIGINT, _sigint_handler);
}
}
else
close(channel[0]);
}
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
NSDate* date = [NSDate distantFuture];
while (true)
{ NSEvent* event = [NSApp nextEventMatchingMask: NSAnyEventMask
untilDate: date
inMode: NSDefaultRunLoopMode
dequeue: YES];
if (!event) break; /* No windows open */
if ([event type]==NSApplicationDefined)
{ short subtype = [event subtype];
if (subtype==STDIN_READY) break;
if (subtype==SIGINT_CALLED)
{ interrupted = true;
break;
}
}
[NSApp sendEvent: event];
}
[pool release];
if (py_sigint_handler) PyOS_setsig(SIGINT, py_sigint_handler);
CFReadStreamUnscheduleFromRunLoop(stream,
runloop,
kCFRunLoopCommonModes);
if (sigint_socket) CFSocketInvalidate(sigint_socket);
if (error==0) close(channel[1]);
if (interrupted) raise(SIGINT);
}
CFReadStreamClose(stream);
CFRelease(stream);
return 1;
}
#ifndef COMPILING_FOR_10_5
static int _init_atsui(void)
{
OSStatus status;
status = ATSUCreateStyle(&style);
if (status!=noErr)
{
PyErr_SetString(PyExc_RuntimeError, "ATSUCreateStyle failed");
return 0;
}
status = ATSUCreateTextLayout(&layout);
if (status!=noErr)
{
status = ATSUDisposeStyle(style);
if (status!=noErr)
PyErr_WarnEx(PyExc_RuntimeWarning, "ATSUDisposeStyle failed", 1);
PyErr_SetString(PyExc_RuntimeError, "ATSUCreateTextLayout failed");
return 0;
}
return 1;
}
static void _dealloc_atsui(void)
{
OSStatus status;
status = ATSUDisposeStyle(style);
if (status!=noErr)
PyErr_WarnEx(PyExc_RuntimeWarning, "ATSUDisposeStyle failed", 1);
status = ATSUDisposeTextLayout(layout);
if (status!=noErr)
PyErr_WarnEx(PyExc_RuntimeWarning, "ATSUDisposeTextLayout failed", 1);
}
#endif
static int _draw_path(CGContextRef cr, void* iterator, int nmax)
{
double x1, y1, x2, y2;
static unsigned code = STOP;
static double xs, ys;
CGPoint current;
int n = 0;
if (code == MOVETO) CGContextMoveToPoint(cr, xs, ys);
while (true)
{
code = get_vertex(iterator, &x1, &y1);
if (code == CLOSEPOLY)
{
CGContextClosePath(cr);
n++;
}
else if (code == STOP)
{
break;
}
else if (code == MOVETO)
{
CGContextMoveToPoint(cr, x1, y1);
}
else if (code==LINETO)
{
CGContextAddLineToPoint(cr, x1, y1);
n++;
}
else if (code==CURVE3)
{
get_vertex(iterator, &xs, &ys);
CGContextAddQuadCurveToPoint(cr, x1, y1, xs, ys);
n+=2;
}
else if (code==CURVE4)
{
get_vertex(iterator, &x2, &y2);
get_vertex(iterator, &xs, &ys);
CGContextAddCurveToPoint(cr, x1, y1, x2, y2, xs, ys);
n+=3;
}
if (n >= nmax)
{
switch (code)
{
case MOVETO:
case LINETO:
xs = x1;
ys = y1;
break;
case CLOSEPOLY:
current = CGContextGetPathCurrentPoint(cr);
xs = current.x;
ys = current.y;
break;
/* nothing needed for CURVE3, CURVE4 */
}
code = MOVETO;
return -n;
}
}
return n;
}
static void _draw_hatch(void *info, CGContextRef cr)
{
int n;
PyObject* hatchpath = (PyObject*)info;
PyObject* transform;
int nd = 2;
npy_intp dims[2] = {3, 3};
int typenum = NPY_DOUBLE;
double data[9] = {HATCH_SIZE, 0, 0, 0, HATCH_SIZE, 0, 0, 0, 1};
double rect[4] = { 0.0, 0.0, HATCH_SIZE, HATCH_SIZE};
transform = PyArray_SimpleNewFromData(nd, dims, typenum, data);
if (!transform)
{
PyGILState_STATE gstate = PyGILState_Ensure();
PyErr_Print();
PyGILState_Release(gstate);
return;
}
void* iterator = get_path_iterator(hatchpath,
transform,
0,
0,
rect,
SNAP_FALSE,
1.0,
0);
Py_DECREF(transform);
if (!iterator)
{
PyGILState_STATE gstate = PyGILState_Ensure();
PyErr_SetString(PyExc_RuntimeError, "failed to obtain path iterator for hatching");
PyErr_Print();
PyGILState_Release(gstate);
return;
}
n = _draw_path(cr, iterator, INT_MAX);
free_path_iterator(iterator);
if (n==0) return;
CGContextSetLineWidth(cr, 1.0);
CGContextSetLineCap(cr, kCGLineCapSquare);
CGContextDrawPath(cr, kCGPathFillStroke);
}
static void _release_hatch(void* info)
{
PyObject* hatchpath = (PyObject*)info;
Py_DECREF(hatchpath);
}
/* ---------------------------- Cocoa classes ---------------------------- */
@interface Window : NSWindow
{ PyObject* manager;
}
- (Window*)initWithContentRect:(NSRect)rect styleMask:(unsigned int)mask backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation withManager: (PyObject*)theManager;
- (NSRect)constrainFrameRect:(NSRect)rect toScreen:(NSScreen*)screen;
- (BOOL)closeButtonPressed;
- (void)close;
- (void)dealloc;
@end
@interface ToolWindow : NSWindow
{
}
- (ToolWindow*)initWithContentRect:(NSRect)rect master:(NSWindow*)window;
- (void)masterCloses:(NSNotification*)notification;
- (void)close;
@end
#ifdef COMPILING_FOR_10_6
@interface View : NSView <NSWindowDelegate>
#else
@interface View : NSView
#endif
{ PyObject* canvas;
NSRect rubberband;
BOOL inside;
NSTrackingRectTag tracking;
}
- (void)dealloc;
- (void)drawRect:(NSRect)rect;
- (void)windowDidResize:(NSNotification*)notification;
- (View*)initWithFrame:(NSRect)rect;
- (void)setCanvas: (PyObject*)newCanvas;
- (void)windowWillClose:(NSNotification*)notification;
- (BOOL)windowShouldClose:(NSNotification*)notification;
- (BOOL)isFlipped;
- (void)mouseEntered:(NSEvent*)event;
- (void)mouseExited:(NSEvent*)event;
- (void)mouseDown:(NSEvent*)event;
- (void)mouseUp:(NSEvent*)event;
- (void)mouseDragged:(NSEvent*)event;
- (void)mouseMoved:(NSEvent*)event;
- (void)rightMouseDown:(NSEvent*)event;
- (void)rightMouseUp:(NSEvent*)event;
- (void)rightMouseDragged:(NSEvent*)event;
- (void)otherMouseDown:(NSEvent*)event;
- (void)otherMouseUp:(NSEvent*)event;
- (void)otherMouseDragged:(NSEvent*)event;
- (void)setRubberband:(NSRect)rect;
- (void)removeRubberband;
- (const char*)convertKeyEvent:(NSEvent*)event;
- (void)keyDown:(NSEvent*)event;
- (void)keyUp:(NSEvent*)event;
- (void)scrollWheel:(NSEvent *)event;
- (BOOL)acceptsFirstResponder;
//- (void)flagsChanged:(NSEvent*)event;
@end
@interface ScrollableButton : NSButton
{
SEL scrollWheelUpAction;
SEL scrollWheelDownAction;
}
- (void)setScrollWheelUpAction:(SEL)action;
- (void)setScrollWheelDownAction:(SEL)action;
- (void)scrollWheel:(NSEvent *)event;
@end
@interface MenuItem: NSMenuItem
{ int index;
}
+ (MenuItem*)menuItemWithTitle:(NSString*)title;
+ (MenuItem*)menuItemSelectAll;
+ (MenuItem*)menuItemInvertAll;
+ (MenuItem*)menuItemForAxis:(int)i;
- (void)toggle:(id)sender;
- (void)selectAll:(id)sender;
- (void)invertAll:(id)sender;
- (int)index;
@end
/* ---------------------------- Python classes ---------------------------- */
typedef struct {
PyObject_HEAD
CGContextRef cr;
NSSize size;
int level;
BOOL forced_alpha;
CGFloat color[4];
float dpi;
} GraphicsContext;
static CGMutablePathRef _create_path(void* iterator)
{
unsigned code;
CGMutablePathRef p;
double x1, y1, x2, y2, x3, y3;
p = CGPathCreateMutable();
if (!p) return NULL;
while (true)
{
code = get_vertex(iterator, &x1, &y1);
if (code == CLOSEPOLY)
{
CGPathCloseSubpath(p);
}
else if (code == STOP)
{
break;
}
else if (code == MOVETO)
{
CGPathMoveToPoint(p, NULL, x1, y1);
}
else if (code==LINETO)
{
CGPathAddLineToPoint(p, NULL, x1, y1);
}
else if (code==CURVE3)
{
get_vertex(iterator, &x2, &y2);
CGPathAddQuadCurveToPoint(p, NULL, x1, y1, x2, y2);
}
else if (code==CURVE4)
{
get_vertex(iterator, &x2, &y2);
get_vertex(iterator, &x3, &y3);
CGPathAddCurveToPoint(p, NULL, x1, y1, x2, y2, x3, y3);
}
}
return p;
}
static int _get_snap(GraphicsContext* self, enum e_snap_mode* mode)
{
PyObject* snap = PyObject_CallMethod((PyObject*)self, "get_snap", "");
if(!snap) return 0;
if(snap==Py_None) *mode = SNAP_AUTO;
else if (PyBool_Check(snap)) *mode = SNAP_TRUE;
else *mode = SNAP_FALSE;
Py_DECREF(snap);
return 1;
}
static PyObject*
GraphicsContext_new(PyTypeObject* type, PyObject *args, PyObject *kwds)
{
GraphicsContext* self = (GraphicsContext*)type->tp_alloc(type, 0);
if (!self) return NULL;
self->cr = NULL;
self->level = 0;
self->forced_alpha = FALSE;
#ifndef COMPILING_FOR_10_5
if (ngc==0)
{
int ok = _init_atsui();
if (!ok)
{
return NULL;
}
}
ngc++;
#endif
return (PyObject*) self;
}
#ifndef COMPILING_FOR_10_5
static void
GraphicsContext_dealloc(GraphicsContext *self)
{
ngc--;
if (ngc==0) _dealloc_atsui();
Py_TYPE(self)->tp_free((PyObject*)self);
}
#endif
static PyObject*
GraphicsContext_repr(GraphicsContext* self)
{
#if PY3K
return PyUnicode_FromFormat("GraphicsContext object %p wrapping the Quartz 2D graphics context %p", (void*)self, (void*)(self->cr));
#else
return PyString_FromFormat("GraphicsContext object %p wrapping the Quartz 2D graphics context %p", (void*)self, (void*)(self->cr));
#endif
}
static PyObject*
GraphicsContext_save (GraphicsContext* self)
{
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
CGContextSaveGState(cr);
self->level++;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_restore (GraphicsContext* self)
{
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
if (self->level==0)
{
PyErr_SetString(PyExc_RuntimeError,
"Attempting to execute CGContextRestoreGState on an empty stack");
return NULL;
}
CGContextRestoreGState(cr);
self->level--;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_alpha (GraphicsContext* self, PyObject* args)
{
float alpha;
int forced = 0;
if (!PyArg_ParseTuple(args, "f|i", &alpha, &forced)) return NULL;
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
CGContextSetAlpha(cr, alpha);
self->forced_alpha = (BOOL)(forced || (alpha != 1.0));
Py_INCREF(Py_None);
return Py_None;
}
static BOOL
_set_antialiased(CGContextRef cr, PyObject* antialiased)
{
const int shouldAntialias = PyObject_IsTrue(antialiased);
if (shouldAntialias < 0)
{
PyErr_SetString(PyExc_ValueError,
"Failed to read antialiaseds variable");
return false;
}
CGContextSetShouldAntialias(cr, shouldAntialias);
return true;
}
static PyObject*
GraphicsContext_set_antialiased (GraphicsContext* self, PyObject* args)
{
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
if (!_set_antialiased(cr, args)) return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_capstyle (GraphicsContext* self, PyObject* args)
{
char* string;
CGLineCap cap;
if (!PyArg_ParseTuple(args, "s", &string)) return NULL;
if (!strcmp(string, "butt")) cap = kCGLineCapButt;
else if (!strcmp(string, "round")) cap = kCGLineCapRound;
else if (!strcmp(string, "projecting")) cap = kCGLineCapSquare;
else
{
PyErr_SetString(PyExc_ValueError,
"capstyle should be 'butt', 'round', or 'projecting'");
return NULL;
}
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
CGContextSetLineCap(cr, cap);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_clip_rectangle (GraphicsContext* self, PyObject* args)
{
CGRect rect;
float x, y, width, height;
if (!PyArg_ParseTuple(args, "(ffff)", &x, &y, &width, &height)) return NULL;
rect.origin.x = x;
rect.origin.y = y;
rect.size.width = width;
rect.size.height = height;
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
CGContextClipToRect(cr, rect);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_clip_path (GraphicsContext* self, PyObject* args)
{
int n;
CGContextRef cr = self->cr;
PyObject* path;
int nd = 2;
npy_intp dims[2] = {3, 3};
int typenum = NPY_DOUBLE;
double data[] = {1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0};
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
if(!PyArg_ParseTuple(args, "O", &path)) return NULL;
PyObject* transform = PyArray_SimpleNewFromData(nd, dims, typenum, data);
if (!transform) return NULL;
double rect[4] = {0.0, 0.0, self->size.width, self->size.height};
void* iterator = get_path_iterator(path,
transform,
0,
0,
rect,
SNAP_AUTO,
1.0,
0);
Py_DECREF(transform);
if (!iterator)
{
PyErr_SetString(PyExc_RuntimeError,
"set_clip_path: failed to obtain path iterator for clipping");
return NULL;
}
n = _draw_path(cr, iterator, INT_MAX);
free_path_iterator(iterator);
if (n > 0) CGContextClip(cr);
Py_INCREF(Py_None);
return Py_None;
}
static BOOL
_set_dashes(CGContextRef cr, PyObject* linestyle)
{
CGFloat phase = 0.0;
PyObject* offset;
PyObject* dashes;
if (!PyArg_ParseTuple(linestyle, "OO", &offset, &dashes))
{
PyErr_SetString(PyExc_TypeError,
"failed to obtain the offset and dashes from the linestyle");
return false;
}
if (offset!=Py_None)
{
if (PyFloat_Check(offset)) phase = PyFloat_AS_DOUBLE(offset);
#if PY3K
else if (PyLong_Check(offset)) phase = PyLong_AS_LONG(offset);
#else
else if (PyInt_Check(offset)) phase = PyInt_AS_LONG(offset);
#endif
else
{
PyErr_SetString(PyExc_TypeError,
"offset should be a floating point value");
return false;
}
}
if (dashes!=Py_None)
{
if (PyList_Check(dashes)) dashes = PyList_AsTuple(dashes);
else if (PyTuple_Check(dashes)) Py_INCREF(dashes);
else
{
PyErr_SetString(PyExc_TypeError,
"dashes should be a tuple or a list");
return false;
}
int n = PyTuple_GET_SIZE(dashes);
int i;
CGFloat* lengths = malloc(n*sizeof(CGFloat));
if(!lengths)
{
PyErr_SetString(PyExc_MemoryError, "Failed to store dashes");
Py_DECREF(dashes);
return false;
}
for (i = 0; i < n; i++)
{
PyObject* value = PyTuple_GET_ITEM(dashes, i);
if (PyFloat_Check(value))
lengths[i] = (CGFloat) PyFloat_AS_DOUBLE(value);
#if PY3K
else if (PyLong_Check(value))
lengths[i] = (CGFloat) PyLong_AS_LONG(value);
#else
else if (PyInt_Check(value))
lengths[i] = (CGFloat) PyInt_AS_LONG(value);
#endif
else break;
}
Py_DECREF(dashes);
if (i < n) /* break encountered */
{
free(lengths);
PyErr_SetString(PyExc_TypeError, "Failed to read dashes");
return false;
}
CGContextSetLineDash(cr, phase, lengths, n);
free(lengths);
}
else
CGContextSetLineDash(cr, phase, NULL, 0);
return true;
}
static PyObject*
GraphicsContext_set_dashes (GraphicsContext* self, PyObject* args)
{
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
if (!_set_dashes(cr, args))
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_foreground(GraphicsContext* self, PyObject* args)
{
float r, g, b, a;
if(!PyArg_ParseTuple(args, "(ffff)", &r, &g, &b, &a)) return NULL;
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
if (self->forced_alpha)
{
// Transparency is applied to layer
// Let it override (rather than multiply with) the alpha of the
// stroke/fill colors
a = 1.0;
}
CGContextSetRGBStrokeColor(cr, r, g, b, a);
CGContextSetRGBFillColor(cr, r, g, b, a);
self->color[0] = r;
self->color[1] = g;
self->color[2] = b;
self->color[3] = a;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_graylevel(GraphicsContext* self, PyObject* args)
{ float gray;
if(!PyArg_ParseTuple(args, "f", &gray)) return NULL;
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
CGContextSetGrayStrokeColor(cr, gray, 1.0);
CGContextSetGrayFillColor(cr, gray, 1.0);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_dpi (GraphicsContext* self, PyObject* args)
{
if (!PyArg_ParseTuple(args, "f", &(self->dpi))) return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_linewidth (GraphicsContext* self, PyObject* args)
{
float width;
if (!PyArg_ParseTuple(args, "f", &width)) return NULL;
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
// Convert points to pixels
width *= self->dpi / 72.0;
CGContextSetLineWidth(cr, width);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_set_joinstyle(GraphicsContext* self, PyObject* args)
{ char* string;
CGLineJoin join;
if (!PyArg_ParseTuple(args, "s", &string)) return NULL;
if (!strcmp(string, "miter")) join = kCGLineJoinMiter;
else if (!strcmp(string, "round")) join = kCGLineJoinRound;
else if (!strcmp(string, "bevel")) join = kCGLineJoinBevel;
else
{
PyErr_SetString(PyExc_ValueError,
"joinstyle should be 'miter', 'round', or 'bevel'");
return NULL;
}
CGContextRef cr = self->cr;
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
CGContextSetLineJoin(cr, join);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
GraphicsContext_draw_path (GraphicsContext* self, PyObject* args)
{
PyObject* path;
PyObject* transform;
PyObject* rgbFace;
float linewidth;
int n;
void* iterator;
CGContextRef cr = self->cr;
double rect[4] = { 0.0, 0.0, self->size.width, self->size.height};
if (!cr)
{
PyErr_SetString(PyExc_RuntimeError, "CGContextRef is NULL");
return NULL;
}
if(!PyArg_ParseTuple(args, "OOf|O",
&path,
&transform,
&linewidth,
&rgbFace)) return NULL;
if(rgbFace==Py_None) rgbFace = NULL;
iterator = get_path_iterator(path,
transform,
1,
0,
rect,
SNAP_AUTO,
linewidth,
rgbFace == NULL);
if (!iterator)
{
PyErr_SetString(PyExc_RuntimeError,
"draw_path: failed to obtain path iterator");
return NULL;
}
if(rgbFace)
{
float r, g, b, a;
a = 1.0;
if (!PyArg_ParseTuple(rgbFace, "fff|f", &r, &g, &b, &a))