Native Development

[sucroid]

I have the following code.  The screen_read_display function returned with error code 1 (EPERM),

which is "not by owner".  Does anyone know what the problem is?  Any help wil be greatly appreciated.

screen_context_t screen_ctx;

screen_display_t screen_disp;

screen_create_context(&screen_ctx, 0);

screen_pixmap_t screen_pix;

screen_create_pixmap(&screen_pix, screen_ctx);

screen_set_pixmap_property_iv(screen_pix, SCREEN_PROPERTY_USAGE, &usage);

int format = SCREEN_FORMAT_RGB565;

int size[2] = {screen_width, screen_height};

screen_set_pixmap_property_iv(screen_pix, SCREEN_PROPERTY_BUFFER_SIZE, size);

screen_buffer_t screen_pbuf;

 screen_create_pixmap_buffer(screen_pix);

screen_get_pixmap_property_pv(screen_pix, SCREEN_PROPERTY_RENDER_BUFFERS, (void**)&screen_pbuf);

rc = screen_read_display( screen_disp, screen_pbuf,  0, NULL, 0 );

if (rc) {

    fprintf(stderr, "screen_read_display failed errno %d\n", errno);

}

[smcveigh]

http://supportforums.blackberry.com/t5/Native-SDK-for-BlackBerry-Tablet/Display-Capture-API/td-p/159...

[sucroid]

Thanks for the link.  But if this is not supposed to work, why does the NDK documentation not mention this fact?

[smcveigh]

It probably shouldn't be published in the public NDK docs.  The function is used internally by other OS services.

Cheers,

Sean