Ok, it is working perfectly with:
evas_object_image_size_set(evas_image, opencv_image.size().width,
opencv_image.size().height);
if (opencv_image.data) {
evas_object_image_data_copy_set(evas_image, opencv_image.data);
evas_object_image_data_update_add(evas_image, 0, 0,
opencv_image.size().width, opencv_image.size().height);
}
I see in documentation:
Note that the caller is responsible for freeing the buffer when finished
with it, as user-set image data will not be automatically freed when the
image object is deleted.
How can i free, the buffer ?
Thanks
Nicolas.
> On Thu, 26 Sep 2013 12:18:57 +0200 Nicolas ALCOUFFE <nicolas.alcou...@free.fr>
> said:
>
> when you set the image data, evas doesnt COPY it... it refers to it. directly.
> at any point that image object may possibly need to be rendered evas will need
> access to the image data pointer and it must be VALID at all times until the
> image object stops pointing to that data (set data to NULL). if you set data
> without that data ptr being the ptr you get from getting the data form evas
> (when evas itself manages and allocates the image data)... then you are
> setting
> foreign data that YOU then manage (not evas), and YOU must ensure the data is
> valid and available (given the image size that has been set) for the lifespan
> of the image object as long as it doesnt have the data unset... :)
>
>> What do you mean ?
>>> you're freeing your image data before it gets rendered.
>>>
>>>
>>> On Thu, Sep 26, 2013 at 10:58 AM, Nicolas ALCOUFFE <nicolas.alcou...@free.fr
>>>> wrote:
>>>> Hi,
>>>>
>>>> For some reason, i need to convert an OpenCV image to Evas Image, i do:
>>>>
>>>> opencv_image = imread("fruits.jpg", 1);
>>>> cvtColor(opencv_image, opencv_image, CV_BGR2BGRA);
>>>>
>>>> evas_image = evas_object_image_add(canvas);
>>>> evas_object_image_colorspace_set(evas_image, EVAS_COLORSPACE_ARGB8888);
>>>> evas_object_image_size_set(evas_image, opencv_image.size().width,
>>>> opencv_image.size().height);
>>>> evas_object_image_fill_set(evas_image, 0, 0, opencv_image.size().width,
>>>> opencv_image.size().height);
>>>> evas_object_resize (evas_image, opencv_image.size().width,
>>>> opencv_image.size().height);
>>>> evas_object_image_data_set(evas_image, opencv_image.data);
>>>> evas_object_show(evas_image);
>>>>
>>>> This code is perfectly working, for only one image, so i created an
>>>> Ecore Timer to get image in real time from my webcam:
>>>> timer = ecore_timer_add(0.01, update, NULL);
>>>>
>>>> My update function is:
>>>>
>>>> Mat opencv_image;
>>>> opencv_image = cvQueryFrame(capture);
>>>> cvtColor(opencv_image, opencv_image, CV_BGR2BGRA);
>>>> evas_object_image_size_set(evas_image, opencv_image.size().width,
>>>> opencv_image.size().height);
>>>> evas_object_image_fill_set(evas_image, 0, 0, opencv_image.size().width,
>>>> opencv_image.size().height);
>>>> evas_object_resize (evas_image, opencv_image.size().width,
>>>> opencv_image.size().height);
>>>> evas_object_image_data_set(evas_image, opencv_image.data);
>>>>
>>>> but when i'm running this, i get:
>>>>
>>>> Program received signal SIGSEGV, Segmentation fault.
>>>> [Switching to Thread 0xb4ae4b40 (LWP 2383)]
>>>> _op_copy_p_dp_mmx () at
>>>> lib/evas/common/./evas_op_copy/op_copy_pixel_i386.c:8
>>>> 8 MOVE_16DWORDS_MMX(s, d);
>>>> (gdb) bt
>>>> #0 _op_copy_p_dp_mmx () at
>>>> lib/evas/common/./evas_op_copy/op_copy_pixel_i386.c:8
>>>> #1 0xb78c0d54 in evas_common_scale_rgba_sample_draw () at
>>>> lib/evas/common/evas_scale_sample.c:212
>>>> #2 0xb78d5d3d in _draw_thread_image_draw () at
>>>> modules/evas/engines/software_generic/evas_engine.c:1196
>>>> #3 0xb78c83cb in evas_thread_worker_func () at
>>>> lib/evas/common/evas_thread_render.c:107
>>>> #4 0xb5e1552c in _eina_internal_call () at lib/eina/eina_thread.c:280
>>>> #5 0xb7788d4c in start_thread (arg=0xb4ae4b40) at pthread_create.c:308
>>>> #6 0xb76c7dde in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
>>>>
>>>> Someone know if it's a bug in evas or if i do something wrong ?
>>>> I'm using efl from git.
>>>>
>>>> Thanks in advance for your response.
>>>> Nicolas.
>>>>
>>>>
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