Thanks, Robert.I tried building from the top of Clutter1.14 branch and wip/cogl-14-fixes branch (this is for an ARM processor, BTW) and tested it with the out of memory situation. The results were as follows: an abort occurred in glibc and the following Cogl warning was produced. Is this happening because the code is trying to free the texture allocation that was actually never made?Reza(.:2259): Cogl-WARNING **: CoglError set over the top of a previous CoglError or uninitialized memory.This indicates a bug in someone's code. You must ensure an error is NULL before it's set.The overwriting error message was: Out of memory*** glibc detected *** Volt: free(): invalid next size (normal): 0x013171a0 ***=#0 0x41ead5b0 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:67#1 0x41eb0ff0 in __GI_abort () at abort.c:108#2 0x41ee1fe8 in __libc_message (do_abort=<optimized out>, fmt=Could not find the frame base for "__libc_message".) at ../sysdeps/unix/sysv/linux/libc_fatal.c:201#3 0x41eeca34 in malloc_printerr (action="" out>, str=<optimized out>, ptr=<optimized out>) at malloc.c:6538#4 0x41ef1a04 in __GI___libc_free (mem=<optimized out>) at malloc.c:3760#5 0x49a61ec0 in g_free ()#6 0x49a2ea2c in array_free ()#7 0x40319de0 in _cogl_texture_2d_sliced_slices_free ()#8 0x40319e00 in _cogl_texture_2d_sliced_free ()#9 0x40318158 in _cogl_object_texture_2d_sliced_indirect_free ()#10 0x402d6ae8 in _cogl_object_default_unref ()#11 0x402d6b44 in cogl_object_unref ()#12 0x40316bfc in cogl_texture_new_with_size ()#13 0x4049ba10 in clutter_offscreen_effect_real_create_texture (effect=0x144d808, width=1920, height=1080) at ./clutter-offscreen-effect.c:143#14 0x4049cbfc in clutter_offscreen_effect_create_texture (effect=0x144d808, width=1920, height=1080) at ./clutter-offscreen-effect.c:600#15 0x4049bc60 in update_fbo (effect=0x144d808, fbo_width=1920, fbo_height=1080) at ./clutter-offscreen-effect.c:203On Sat, Oct 12, 2013 at 6:43 AM, Robert Bragg <robert sixbynine org> wrote:
Hi Reza,Cogl 1.14 should be able to gracefully report out of memory conditions when allocating textures and framebuffers. The recommended way would be to use cogl_texture_allocate() and cogl_framebuffer_allocate() to explicitly try and allocate texture and framebuffer resources which can report a CoglError if there was a problem.If you are using Cogl's high level texture constructors like cogl_texture_new_with_size or cogl_texture_new_from_data then these apis should return NULL if there was a problem allocating the texture due to lack of memory but in Cogl 1.14 it looks like we broke these semantics and it's possible for cogl_texture_new_with_size to return a CoglTexture object which doesn't yet have an associated allocation and you could hit an error later if you try to create a framebuffer from that texture if it turns out you don't have enough memory.I think Clutter 1.14 uses cogl_texture_new_with_size for the offscreen effects and it is expecting it to return NULL if there is an error. Similarly Clutter uses cogl_offscreen_new_to_texture() and expects that to return NULL on failure to allocate. I'm afraid that we also broke the semantics of this api too :-/I've just push a wip/cogl-14-fixes branch with a couple of patches that may help you by fixing both of those regressions on the 1.14 branch.I hope that helps,RobertOn Sat, Oct 12, 2013 at 12:00 AM, Reza Ghassemi <reza robin1 gmail com> wrote:
_______________________________________________Sorry, somehow sent this before I was done.To conclude:The output below shows Clutter warning when the texture for the 2nd offscreen effect (blur) on an actor tree could not be allocated. The first effect (desaturate) did get allocated and applied and displayed properly. However when an animated page turn effect on a stack of 5 actors was attempted the GL out of memory errors occurred and parts or the entire screen went black.Question: Any recommendations how to deal with this? Is this a bug in cogl or clutter? Is this expected? We want to just not do the effect if memory is going to run out and avoid the black screen. Should we do some memory queries and keep track of how much we might need and catch potential problems in application code?Upgrading to 1.16 is going to take some effect do to dependency changes and deprecated function use so we'd like to avoid that if possible.Thanks again.RezaOn Fri, Oct 11, 2013 at 3:36 PM, Reza Ghassemi <reza robin1 gmail com> wrote:
Hello Clutter users and developers,Using the top of 1.14 branch when trying to use 2 offscreen effects such as blur and desaturate on a full HD screen sized actor and then after that trying to do a page turn effect on a smaller actor we run out of video RAM (I'm assuming) on our OpenGL ES device and get errors from Cogl when it calls GL calls to render attributes or allocate texture memory for resulting in black actor(s).While we might be able to fix this particular issue by making sure to remove/destroy the effects from the actor before applying another effect on another actor, we want a graceful general way to handle tight memory situations and not just display black to support other party developement with our script driven driven system. It seems that you can eat up most of your memory with an effect and then memory runs out just trying to draw normal actors with no effectsClutter-WARNING **: Unable to allocate texture for offscreen effect: Out of memoryHowever we get into a situation where we're getting errors from GL out of memory I guess when trying to use more than one offscreen effect in the same scene and when some of them are failing. This results in black textures. It seems that the memory isn't recovered until the actors are deleted and a new scene is constructed.(.:1836): Cogl-WARNING **: ./driver/gl/cogl-framebuffer-gl.c:1072: GL error (1285): Out of memory(.:1836): Cogl-WARNING **: ./driver/gl/cogl-framebuffer-gl.c:1072: GL error (1285): Out of memory(.:1836): Cogl-WARNING **: ./driver/gl/cogl-framebuffer-gl.c:1139: GL error (1285): Out of memory(.:1836): Cogl-WARNING **: ./driver/gl/cogl-framebuffer-gl.c:1072: GL error (1285): Out of memory(.:1836): Cogl-WARNING **: ./driver/gl/cogl-framebuffer-gl.c:1072: GL error (1285): Out of memory(.:1836): Cogl-WARNING **: ./driver/gl/cogl-framebuffer-gl.c:1139: GL error (1285): Out of memory(.:1836): Cogl-WARNING **: ./driver/gl/cogl-framebuffer-gl.c:1072: GL error (1285): Out of memory
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