On Mon, Feb 8, 2010 at 2:49 PM, Shuduo Sang <[email protected]> wrote:
> On Mon, Feb 8, 2010 at 9:22 PM, Cedric BAIL <[email protected]> wrote:
>> On Mon, Feb 8, 2010 at 2:11 PM, Shuduo Sang <[email protected]> wrote:
>> > I am a newbie who study efl programming recently. I try to write my
>> > first
>> > program but meet problem always return NULL for creating canvas. I have
>> > googled someone met that too but no clear answer.
>> > I can get supported engines by ecore_evas_engines_get(), are
>> > software_x11,
>> > xrender_x11, opengl_x11, fb, and buffer.
>> > My platform is Ubuntu 9.10 and I think I installed all necessary
>> > libraries
>> > since I can build it successfully by command.
>> >
>> > gcc `pkg-config --libs --cflags evas ecore ecore-evas` ecore_test.c -o
>> > ecore_test
>> >
>> > My code is following.
>> >
>> > ...
>> >
>> >  22         if ( !ecore_init()) return EXIT_FAILURE;
>> >  23         if ( !ecore_evas_init()) return EXIT_FAILURE;
>> >  24
>> >  25         if (NULL == (eina_list = ecore_evas_engines_get()))
>> >  26                 return EXIT_FAILURE;
>> >  27
>> >  28         EINA_LIST_FOREACH(eina_list, l, data)
>> >  29                 if(data) printf("data %s\n", data);
>> >  30         ecore_evas_engines_free(eina_list);
>> >  31
>> >  32         ecore_evas = ecore_evas_software_x11_new(NULL, 0, 0, 0, W,
>> > H);
>> >  33         if (!ecore_evas)
>> >  34                 ecore_evas = ecore_evas_gl_x11_new(NULL, 0, 0, 0, W,
>> > H);
>> >  35         if (!ecore_evas)
>> >  36                 ecore_evas = ecore_evas_fb_new(NULL, 0, W, H);
>> >  37         if (!ecore_evas)
>> >  38                 ecore_evas = ecore_evas_xrender_x11_new(NULL, 0, 0,
>> > 0,
>> > W, H);
>> >  39         if (!ecore_evas){
>> >  40                 printf("ERROR: Cannot create canvas\n");
>> >  41                 return EXIT_FAILURE;
>> >  42         }
>>
>> You can use "ecore_evas = ecore_evas_new(NULL, 0, 0, W, H, NULL);".
>> And it will automatically pick a working engine.
>
> I got NULL again. :(
>

Try by enabling more log message with :
EINA_LOG_LEVELS=5 your_prog

-- 
Cedric BAIL

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