cpython/Mac/Modules/cg/cgsupport.py

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2001-12-13 09:17:20 -04:00
# This script generates a Python interface for an Apple Macintosh Manager.
# It uses the "bgen" package to generate C code.
# The function specifications are generated by scanning the mamager's header file,
# using the "scantools" package (customized for this particular manager).
#error missing SetActionFilter
import string
# Declarations that change for each manager
MODNAME = '_CG' # The name of the module
# The following is *usually* unchanged but may still require tuning
MODPREFIX = 'CG' # The prefix for module-wide routines
INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
OUTPUTFILE = MODNAME + "module.c" # The file generated by this program
from macsupport import *
# Create the type objects
includestuff = includestuff + """
#ifdef WITHOUT_FRAMEWORKS
#include <Quickdraw.h>
#include <CGContext.h>
#else
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#include <ApplicationServices/ApplicationServices.h>
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#endif
#if !TARGET_API_MAC_OSX
/* This code is adapted from the CallMachOFramework demo at:
http://developer.apple.com/samplecode/Sample_Code/Runtime_Architecture/CallMachOFramework.htm
It allows us to call Mach-O functions from CFM apps. */
#include <Folders.h>
#include "CFMLateImport.h"
static OSStatus LoadFrameworkBundle(CFStringRef framework, CFBundleRef *bundlePtr)
// This routine finds a the named framework and creates a CFBundle
// object for it. It looks for the framework in the frameworks folder,
// as defined by the Folder Manager. Currently this is
// "/System/Library/Frameworks", but we recommend that you avoid hard coded
// paths to ensure future compatibility.
//
// You might think that you could use CFBundleGetBundleWithIdentifier but
// that only finds bundles that are already loaded into your context.
// That would work in the case of the System framework but it wouldn't
// work if you're using some other, less-obvious, framework.
{
OSStatus err;
FSRef frameworksFolderRef;
CFURLRef baseURL;
CFURLRef bundleURL;
*bundlePtr = nil;
baseURL = nil;
bundleURL = nil;
// Find the frameworks folder and create a URL for it.
err = FSFindFolder(kOnAppropriateDisk, kFrameworksFolderType, true, &frameworksFolderRef);
if (err == noErr) {
baseURL = CFURLCreateFromFSRef(kCFAllocatorSystemDefault, &frameworksFolderRef);
if (baseURL == nil) {
err = coreFoundationUnknownErr;
}
}
// Append the name of the framework to the URL.
if (err == noErr) {
bundleURL = CFURLCreateCopyAppendingPathComponent(kCFAllocatorSystemDefault, baseURL, framework, false);
if (bundleURL == nil) {
err = coreFoundationUnknownErr;
}
}
// Create a bundle based on that URL and load the bundle into memory.
// We never unload the bundle, which is reasonable in this case because
// the sample assumes that you'll be calling functions from this
// framework throughout the life of your application.
if (err == noErr) {
*bundlePtr = CFBundleCreate(kCFAllocatorSystemDefault, bundleURL);
if (*bundlePtr == nil) {
err = coreFoundationUnknownErr;
}
}
if (err == noErr) {
if ( ! CFBundleLoadExecutable( *bundlePtr ) ) {
err = coreFoundationUnknownErr;
}
}
// Clean up.
if (err != noErr && *bundlePtr != nil) {
CFRelease(*bundlePtr);
*bundlePtr = nil;
}
if (bundleURL != nil) {
CFRelease(bundleURL);
}
if (baseURL != nil) {
CFRelease(baseURL);
}
return err;
}
// The CFMLateImport approach requires that you define a fragment
// initialisation routine that latches the fragment's connection
// ID and locator. If your code already has a fragment initialiser
// you will have to integrate the following into it.
static CFragConnectionID gFragToFixConnID;
static FSSpec gFragToFixFile;
static CFragSystem7DiskFlatLocator gFragToFixLocator;
extern OSErr FragmentInit(const CFragInitBlock *initBlock);
extern OSErr FragmentInit(const CFragInitBlock *initBlock)
{
__initialize(initBlock); /* call the "original" initializer */
gFragToFixConnID = (CFragConnectionID) initBlock->closureID;
gFragToFixFile = *(initBlock->fragLocator.u.onDisk.fileSpec);
gFragToFixLocator = initBlock->fragLocator.u.onDisk;
gFragToFixLocator.fileSpec = &gFragToFixFile;
return noErr;
}
#endif
extern int GrafObj_Convert(PyObject *, GrafPtr *);
/*
** Manual converters
*/
PyObject *CGPoint_New(CGPoint *itself)
{
return Py_BuildValue("(ff)",
itself->x,
itself->y);
}
int
CGPoint_Convert(PyObject *v, CGPoint *p_itself)
{
if( !PyArg_Parse(v, "(ff)",
&p_itself->x,
&p_itself->y) )
return 0;
return 1;
}
PyObject *CGRect_New(CGRect *itself)
{
return Py_BuildValue("(ffff)",
itself->origin.x,
itself->origin.y,
itself->size.width,
itself->size.height);
}
int
CGRect_Convert(PyObject *v, CGRect *p_itself)
{
if( !PyArg_Parse(v, "(ffff)",
&p_itself->origin.x,
&p_itself->origin.y,
&p_itself->size.width,
&p_itself->size.height) )
return 0;
return 1;
}
PyObject *CGAffineTransform_New(CGAffineTransform *itself)
{
return Py_BuildValue("(ffffff)",
itself->a,
itself->b,
itself->c,
itself->d,
itself->tx,
itself->ty);
}
int
CGAffineTransform_Convert(PyObject *v, CGAffineTransform *p_itself)
{
if( !PyArg_Parse(v, "(ffffff)",
&p_itself->a,
&p_itself->b,
&p_itself->c,
&p_itself->d,
&p_itself->tx,
&p_itself->ty) )
return 0;
return 1;
}
"""
initstuff = initstuff + """
#if !TARGET_API_MAC_OSX
CFBundleRef sysBundle;
OSStatus err;
if (&LoadFrameworkBundle == NULL) {
PyErr_SetString(PyExc_ImportError, "CoreCraphics not supported");
return;
}
err = LoadFrameworkBundle(CFSTR("ApplicationServices.framework"), &sysBundle);
if (err == noErr)
err = CFMLateImportBundle(&gFragToFixLocator, gFragToFixConnID, FragmentInit, "\pCGStubLib", sysBundle);
if (err != noErr) {
PyErr_SetString(PyExc_ImportError, "CoreCraphics not supported");
return;
};
#endif /* !TARGET_API_MAC_OSX */
"""
class MyOpaqueByValueType(OpaqueByValueType):
"""Sort of a mix between OpaqueByValueType and OpaqueType."""
def mkvalueArgs(self, name):
return "%s, &%s" % (self.new, name)
CGPoint = MyOpaqueByValueType('CGPoint', 'CGPoint')
CGRect = MyOpaqueByValueType('CGRect', 'CGRect')
CGAffineTransform = MyOpaqueByValueType('CGAffineTransform', 'CGAffineTransform')
char_ptr = Type("char *", "s")
CGTextEncoding = int
CGLineCap = int
CGLineJoin = int
CGTextDrawingMode = int
CGPathDrawingMode = int
# The real objects
CGContextRef = OpaqueByValueType("CGContextRef", "CGContextRefObj")
class MyObjectDefinition(GlobalObjectDefinition):
def outputStructMembers(self):
ObjectDefinition.outputStructMembers(self)
def outputCleanupStructMembers(self):
Output("CGContextRelease(self->ob_itself);")
# Create the generator groups and link them
module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
CGContextRef_object = MyObjectDefinition('CGContextRef', 'CGContextRefObj', 'CGContextRef')
# ADD object here
module.addobject(CGContextRef_object)
Function = FunctionGenerator
Method = MethodGenerator
CGContextRef_methods = []
# ADD _methods initializer here
execfile(INPUTFILE)
CreateCGContextForPort_body = """\
GrafPtr port;
CGContextRef ctx;
OSStatus _err;
if (!PyArg_ParseTuple(_args, "O&", GrafObj_Convert, &port))
return NULL;
_err = CreateCGContextForPort(port, &ctx);
if (_err != noErr)
if (_err != noErr) return PyMac_Error(_err);
_res = Py_BuildValue("O&", CGContextRefObj_New, ctx);
return _res;
"""
f = ManualGenerator("CreateCGContextForPort", CreateCGContextForPort_body);
f.docstring = lambda: "(CGrafPtr) -> CGContextRef"
module.add(f)
# ADD add forloop here
for f in CGContextRef_methods:
CGContextRef_object.add(f)
# generate output (open the output file as late as possible)
SetOutputFileName(OUTPUTFILE)
module.generate()