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commit 02150e7e23c559f9378d189e7435c2497284a4e9 Author: Cyril Hrubis metan@ucw.cz Date: Thu Mar 21 20:04:46 2013 +0100

pywrap: core: Implement progress callback.

This is first working version of progress callback.

Beware the python API will change.

Signed-off-by: Cyril Hrubis metan@ucw.cz

diff --git a/demos/py_simple/progress_callback.py b/demos/py_simple/progress_callback.py new file mode 100755 index 0000000..707f0ca --- /dev/null +++ b/demos/py_simple/progress_callback.py @@ -0,0 +1,27 @@ +#!/usr/bin/env python + +import sys + +import gfxprim.core as core +import gfxprim.loaders as loaders +import gfxprim.filters as filters + +def progress_callback(callback): + sys.stdout.write("rLoading {:3.2f}%".format(callback)) + return 0 + +def main(): + if len(sys.argv) != 2: + print("Takes an image as an argument") + sys.exit(1) + + callback = core.c_core.GP_ProgressCallback(progress_callback) + + img = loaders.Load(sys.argv[1], callback) + print() + + img = filters.FilterGaussianBlurAlloc(img, 50, 50, callback) + print() + +if __name__ == '__main__': + main() diff --git a/pylib/gfxprim/core/core.i b/pylib/gfxprim/core/core.i index 6e616a1..2657327 100644 --- a/pylib/gfxprim/core/core.i +++ b/pylib/gfxprim/core/core.i @@ -15,12 +15,10 @@ %include "GP_Transform.h" %include "GP_GetSetBits.h" %include "GP_Transform.h" -%include "GP_ProgressCallback.h"

/* * Make members of GP_DebugMsg structure immutable */ - %immutable GP_DebugMsg::level; %immutable GP_DebugMsg::file; %immutable GP_DebugMsg::fn; @@ -30,6 +28,76 @@ %include "GP_Debug.h"

/* + * Callback proxy, calls the python callback from C source + */ +%{ +static int GP_ProgressCallbackProxy(GP_ProgressCallback *self) +{ + PyObject *obj = self->priv; + PyObject *res, *args; + int ret; + + GP_DEBUG(2, "[wrapper] Proxy Callback called"); + + args = Py_BuildValue("(f)", self->percentage); + + res = PyEval_CallObject(obj, args); + + /* Parse Error */ + if (res == NULL) { + GP_WARN("Parse error while calling callback, aborting"); + return 1; + } + + if (PyInt_Check(res)) { + ret = PyInt_AsLong(res); + } else { + GP_WARN("Wrong type returned from callback, aborting"); + return 1; + } + + Py_DECREF(res); + + return ret; +} +%} + +%include "GP_ProgressCallback.h" + +/* + * Progress callback constructor, desctructor and proxy function. + */ +%extend GP_ProgressCallback { + ~GP_ProgressCallback() { + GP_DEBUG(2, "[wrapper] freeing Proxy Callback"); + free($self); + Py_XDECREF($self->priv); + } + GP_ProgressCallback(PyObject* obj) { + GP_ProgressCallback *res; + + if (!PyCallable_Check(obj)) { + GP_WARN("Callback must be callable python object"); + return NULL; + } + + Py_XINCREF(obj); + + res = malloc(sizeof(GP_ProgressCallback)); + + if (res == NULL) + return NULL; + + res->priv = obj; + res->callback = GP_ProgressCallbackProxy; + + GP_DEBUG(2, "[wrapper] creating Proxy Callback"); + + return res; + } +}; + +/* * Color and pixel types */

http://repo.or.cz/w/gfxprim.git/commit/04b114db0cc700aa394c5ef91dfc4b34ac55a...

commit 04b114db0cc700aa394c5ef91dfc4b34ac55a654 Author: Cyril Hrubis metan@ucw.cz Date: Thu Mar 21 20:03:32 2013 +0100

loaders: GP_Loader: Fix signature warning.

Do not print signature warning when operation was canceled by callback.

diff --git a/libs/loaders/GP_Loader.c b/libs/loaders/GP_Loader.c index 0cce654..9f4f4ad 100644 --- a/libs/loaders/GP_Loader.c +++ b/libs/loaders/GP_Loader.c @@ -279,9 +279,9 @@ GP_Context *GP_LoadImage(const char *src_path, GP_ProgressCallback *callback)

/* * Avoid further work if signature was correct but the loader issued - * ENOSYS. + * ENOSYS or ECANCELED. */ - if (ext_load != NULL && errno == ENOSYS) + if (ext_load != NULL && (errno == ENOSYS || errno == ECANCELED)) return NULL;

sig_load = loader_by_signature(src_path);

-----------------------------------------------------------------------

Summary of changes: demos/py_simple/progress_callback.py | 27 +++++++++++++ libs/loaders/GP_Loader.c | 4 +- pylib/gfxprim/core/core.i | 72 +++++++++++++++++++++++++++++++++- 3 files changed, 99 insertions(+), 4 deletions(-) create mode 100755 demos/py_simple/progress_callback.py

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