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1406 commits

Author SHA1 Message Date
Vineeth TM
a0a8b8873b glsl: fix possible string overrun in gst_glsl_version_profile_from_string 
given a NULL-terminated string, s.
s[i] = '\0';
i++;
does not guarentee that s[i] is NULL terminated and thus string operations
could read off the end of the array.

https://bugzilla.gnome.org/show_bug.cgi?id=758039
 2017-12-09 19:32:11 +00:00
Matthew Waters
148940c456 glshader: don't read invalid list pointers (use after free) 
gst_gl_shader_detach_unlocked already removes the list entry so attempting to
use the element to iterate to the next stage could read invalid data.

Based on patch by Vineeth TM <vineeth.tm@samsung.com>

https://bugzilla.gnome.org/show_bug.cgi?id=758039
 2017-12-09 19:32:11 +00:00
Vineeth TM
d5c1ff4bf2 glsl: free str while returning error 
https://bugzilla.gnome.org/show_bug.cgi?id=758039
 2017-12-09 19:32:11 +00:00
Vineeth TM
7a75684566 glslstage: Fix vertex_sources memory leak 
vertex_sources is being allocated but not freed resulting in leak

https://bugzilla.gnome.org/show_bug.cgi?id=757974
 2017-12-09 19:32:11 +00:00
Vineeth TM
7b0125ab11 glcolorconvert: remove unnecessary free 
version_str is already being freed. So no need to call again

https://bugzilla.gnome.org/show_bug.cgi?id=757974
 2017-12-09 19:32:11 +00:00
Vineeth TM
07901d8eed glcolorconvert: Fix string leak 
String got using gst_glsl_version_profile_to_string, is allocated
memory and should be freed

https://bugzilla.gnome.org/show_bug.cgi?id=757974
 2017-12-09 19:32:11 +00:00
Vineeth TM
1f245c3d2e glcolorconvert: Fix frag_prog and frag_body memory leak 
https://bugzilla.gnome.org/show_bug.cgi?id=757974
 2017-12-09 19:32:11 +00:00
Matthew Waters
b30deff7e1 glcolorconvert: mangle gl_FragColor for GL3 
Some drivers don't provide the compatibility definition and we need to provide
our own 'out vec4' variable to put the results of the fragment shader into.

https://bugzilla.gnome.org/show_bug.cgi?id=757938
 2017-12-09 19:32:11 +00:00
Matthew Waters
b8c1ecf268 glviewconvert: remove set_format 
We need the caps to be able to
1. check the caps features
2. get the requested texture-target on input/output
 2017-12-09 19:32:11 +00:00
Matthew Waters
117fc0409a glshader: properly unref the stages on failure 
When failing in the varargs functions, all the stage objects not handled need to
be unreffed to prevent a leak.
 2017-12-09 19:32:11 +00:00
Matthew Waters
1f35fcf06d glslstage: properly return an error when we could not create the shader stage 
While it was erroring out correctly later, there were GLib warnings about
setting a GError over the top of another GError.
 2017-12-09 19:32:10 +00:00
Matthew Waters
ef319c7b8f glshaderstrings: fixup the external-oes fragment shader 
The wrong sampler type was used
s/sampler2DExternalOES/samplerExternalOES/
 2017-12-09 19:32:10 +00:00
Matthew Waters
105497de60 glcolorconvert: try to keep the same texture-target if possible 
Fixes issues attempting to passthrough external-oes textures
 2017-12-09 19:32:10 +00:00
Matthew Waters
46b84c6035 glcolorconvert: fix rendering rectangular textures with GL3 
Rectangular textures are unavailable in unextended
GLES2 #version 100 shaders.

Fixes
texture-target=rectangle ! glcolorconvert ! texture-target=2D

There's a couple of differences between GL3 and GLES2/GL

- varying -> in or out depending on the stage (vertex/fragment)
- attribute -> in
- filtered texture access is a single function, texture()
 2017-12-09 19:32:10 +00:00
Matthew Waters
e32fcfbf3c glcolorconvert: properly use the other texture-target on fixation 2017-12-09 19:32:10 +00:00
Matthew Waters
ec0a93dd7e glslstage: add debug as to why _set_strings() failed 2017-12-09 19:32:10 +00:00
Matthew Waters
5d7556a08d glsl: fix check for glsl version against GL context inversion 
Any GLSL version that was less than the provided GL version would fail
 2017-12-09 19:32:10 +00:00
Matthew Waters
9a3ea0adb7 gl: forward declare some enums 
Specifically the GstGLTextureTarget enum
 2017-12-09 19:32:10 +00:00
Matthew Waters
b1ac029b87 glslstage: expose the default shader strings as public 
Add some other simple strings for external-oes textures or transforming
the texture coordinates with a transformation matrix
 2017-12-09 19:32:10 +00:00
Matthew Waters
6a75a07815 glcolorconvert: wait on the sync meta for input buffers 2017-12-09 19:32:10 +00:00
Matthew Waters
c5f3406186 glcolorconvert: use the correct oes target string in the template caps 2017-12-09 19:32:10 +00:00
Tim-Philipp Müller
7a166e019b glshader, tsdemux: simplify code 
Jus use _delete_link() instead of _remove_link() + _free1()
 2017-12-09 19:32:10 +00:00
Alessandro Decina
7fedb34bea gstglutils: fix shader compilation on Mountain Lion 
Make gst_gl_context_gen_shader/_compile_shader assume GST_GLSL_PROFILE_ES |
GST_GLSL_PROFILE_COMPATIBILITY as the profile. Without this, the shader compiler
doesn't inject the #version tag resulting in a compilation error on Mountain
Lion.

This is a workaround for old code using gst_gl_context_gen_shader. New code
should use the gst_glsl_stage_* API directly which allows the caller to
explicitly specify version/profile.
 2017-12-09 19:32:10 +00:00
Matthew Waters
d41e6a5579 glbufferpool: explicitly initialize a possibly uninitialized variable 
The ret variable may be uninitialized and so its contents were undefined and
the results were erratic (failing with glvideomixer, succeeding in other cases)

P.S. No idea why gcc/clang et al never picked up on this like they normally do
(probably due to some optimisation pass figuring out it's only set once...)
 2017-12-09 19:32:10 +00:00
Matthew Waters
b0d40019f9 glslstage: remove typedefs from the header 
They are already defined in the forward decleration header and defining them
more than once will give an error with OSX's clang about typedef redefinition
being a C11 feature.
 2017-12-09 19:32:10 +00:00
Matthew Waters
2595f73fd0 glcolorconvert: follow the correct texture target names 2017-12-09 19:32:10 +00:00
Matthew Waters
434bbc9f01 glupload: explicitly configure the texture target on the gl buffer pool 
If we don't, then the pool could end up allocating 2D textures when the
caps explictly state they should be rectangle textures.
 2017-12-09 19:32:10 +00:00
Matthew Waters
18f9dfdfe5 glbufferpool: add bufferpool options for the various texture targets 
This was chosen over relying solely on the caps as glupload needs to propose an
allocation and set the texture target based on the output caps.  Setting the
caps in the config is currently pointless as they are overwritten in a lot of
element's decide_allocation functions.

This provides a mechanism for the buffer pool to be configured for a certain
texture target when none has been configured.
 2017-12-09 19:32:10 +00:00
Matthew Waters
6141d3fc7e glcolorconvert: add support for converting texture targets 
Solved with a simple shader templating mechanism and string replacements
of the necessary sampler types/texture accesses and texture coordinate
mangling for rectangular and external-oes textures.
 2017-12-09 19:32:10 +00:00
Matthew Waters
681cb5b16d glmemory: add support for rectangle textures 
Add the various tokens/strings for the differnet texture types (2D, rect, oes)

Changes the GLmemory api to include the GstGLTextureTarget in all relevant
functions.

Update the relevant caps/templates for 2D only textures.
 2017-12-09 19:32:10 +00:00
Matthew Waters
aa32408926 glcolorconvert: order the caps template so that RGBA is first 
glcolorconvert ! glcolorconvert would sometimes negotiated RGB
(the first list entry) otherwise.
 2017-12-09 19:32:10 +00:00
Matthew Waters
33f73b400d glbufferpool: move typedef's into the forward decleration file 
Otherwise, for example, clang will warn about typedef redefinitions
being a C11 feature.
 2017-12-09 19:32:10 +00:00
Julien Isorce
6bb560a4eb glslstage: initialize output params to 0 before calling gl functions 
The client side API of the Chromium's GPU Process has asserts
in debug mode that check that output params are initialized to 0.
 2017-12-09 19:32:10 +00:00
Matthew Waters
ad49a39e5b glcolorconvert: allow outputting multiple textures for gles3 contexts 
the USING_GLES2 includes all GLES3 contexts as well which does support
drawing to multiple buffers.  Instead make or decision solely based on
whether glDrawBuffers is available or not.
 2017-12-09 19:32:10 +00:00
Matthew Waters
cfb0d7e9f3 glviewconvert: expose the element on gles2 platforms 
We can do everything with gles3 however gles2 restricts us not allowing
separated or frame-by-frame multiview modes due to multiple draw buffers.
 2017-12-09 19:32:09 +00:00
Matthew Waters
764c4a33bc gl: fix usage of string.h and stdio.h functions without including the headers 
e.g:
gstglcontext_egl.c:613:7: error: implicit declaration of function 'strcmp'
[-Werror=implicit-function-declaration]
   if (strcmp (G_MODULE_SUFFIX, "so") == 0)
 2017-12-09 19:32:09 +00:00
Matthew Waters
4d46edfd50 gl: remove unneeded shader variable parsing code 2017-12-09 19:32:09 +00:00
Matthew Waters
06de6998e5 gl: be consistent in gobject boilerpate 
GST_GL_IS_* vs GST_IS_GL_*

git grep -l 'GST_GL_IS_' | xargs sed -i 's/GST_GL_IS_/GST_IS_GL_/g'
 2017-12-09 19:32:09 +00:00
Matthew Waters
463e23bb47 glslstage: add brackets around pointer dereference referencing an array 
While technically, i is always 0 and *vertex_sources[i++] is equivalant
to (*vertex_sources)[i++].  Be future-proof in the case of code
moves/changes/etc.

CID 1327406
 2017-12-09 19:32:09 +00:00
Matthew Waters
f688a8f0b2 glshader: port to using GstGLSLStage objects for string management 
A GstGLShader is now simply a collection of stages that are
compiled and linked together into a program.  The uniform/attribute
interface has remained the same.
 2017-12-09 19:32:09 +00:00
Matthew Waters
8c922ca96b glsl: add a shader stage object GstGLSLStage 
Represents a stage (vertex, geometry, fragment, etc) in the shader
pipeline.
 2017-12-09 19:32:09 +00:00
Matthew Waters
18e205dcbb gl/shader/variables: include generic gl.h header 
Otherwise we may miss some forward declarations

Fixes build error: undefined reference to GstGLSLStage
 2017-12-09 19:32:09 +00:00
Matthew Waters
332543f3cf gl: add some GLSL utility functions 
Specifically parsing/setting GLSL versions and the shader related
function table.
 2017-12-09 19:32:09 +00:00
Guillaume Desmottes
01e1046dbc gl: fix leak in gst_gl_insert_debug_marker() 
The string allocated by g_vasprintf() was leaked.

Reproduced using the
validate.file.compositor.simple.play_15s.synchronized validate scenario.

https://bugzilla.gnome.org/show_bug.cgi?id=756492
 2017-12-09 19:32:09 +00:00
Matthew Waters
16ee1636dc gl: move debugging related functions to their own file 2017-12-09 19:32:09 +00:00
Antoine Jacoutot
9117b50cfb gl: Pass GL_CFLAGS to g-ir-scanner 
This unbreaks building when some headers are under a non-standard path.
e.g. /usr/X11R6/include as on OpenBSD.

https://bugzilla.gnome.org/show_bug.cgi?id=755850
 2017-12-09 19:32:09 +00:00
Matthew Waters
37047a1050 glcontext: fixup strstr lengths so we don't overrun 2017-12-09 19:32:09 +00:00
Matthew Waters
73bad9e856 glupload: remove useless release_buffer 
It's a leftover from when we weren't outputting GstBuffer's and
returning raw texture id's.
 2017-12-09 19:32:09 +00:00
Matthew Waters
0580536fa1 glutils: use gst_element_set_context for setting display/other_context 
1. So we get tracking inside GstElement properly when e.g. adding to a bin
2. Removes redundant code.  Now only one place where
   GstContext->GstGLDisplay/GstGLContext transformation occurs
3. Fixes a memory leak in the process
4. Make the retrieval of debug categories thread safe
 2017-12-09 19:32:09 +00:00
Matthew Waters
977c335460 gl/eagl: use the default GL context debug category 2017-12-09 19:32:09 +00:00
Matthew Waters
dc469454d7 gl: set the context on the element on a context query 
Otherwise it's possible to lose the context information if the
context is only propagated through queries.
 2017-12-09 19:32:09 +00:00
Matthew Waters
8187171908 gl: chain up to the parent class for GstElement::set_context 
https://bugzilla.gnome.org/show_bug.cgi?id=705579
 2017-12-09 19:32:08 +00:00
Matthew Waters
bf98930546 gl: sprinkle some debug markers to ease debugging 2017-12-09 19:32:08 +00:00
Matthew Waters
c486b1b3b0 gl/utils: add a function to insert a debug marker 
These markers are visible in tools that record the GL function calls
such as apitrace, et al.

Makes it easier to match up GL draw commands with specific elements.
 2017-12-09 19:32:08 +00:00
Matthew Waters
ec99383a21 gl: add some debugging prototypes 2017-12-09 19:32:08 +00:00
Matthew Waters
e9864e2e3e glwindow: remove unused draw_unlocked function 
The functionality is provided by draw anyway and is leftover from
X11's specific threading requirements that no longer apply.
 2017-12-09 19:32:08 +00:00
Julien Isorce
231e91c883 glfilter: use GL_ELEMENT_ARRAY_BUFFER for vbo indices 
Fixes this error with chromium gpu process:
GL_INVALID_OPERATION, glBindBuffer: buffer bound to more than 1 target

https://bugzilla.gnome.org/show_bug.cgi?id=755618
 2017-12-09 19:32:08 +00:00
Julien Isorce
d0bc54956d glmemory: fix texture leak in _gl_mem_copy 
https://bugzilla.gnome.org/show_bug.cgi?id=755456
 2017-12-09 19:32:08 +00:00
Matthew Waters
6de7db9a4e gl/dispmanx: fix rendering with recent resize state tracking 
557ca6fda5 didn't change to the
necessary gst_gl_window_resize() call for the dispmanx backend.
 2017-12-09 19:32:08 +00:00
Matthew Waters
718318ce19 gl/caopengllayer: fix non-existent selector warning 
557ca6fda5 introduced the queueResize
call without implementing the selector
 2017-12-09 19:32:08 +00:00
Jan Schmidt
6b67fdf2ef glwindow: Fix g_return_val_if_fail in a void function 2017-12-09 19:32:08 +00:00
Matthew Waters
63bbe9406a glwindow: add API to request a resize event on the next draw 
- glimagesink needs to be able to resize the viewport on aspect ratio
  changes resulting from either caps changes or 3d output mode changes.
- Performing a glViewport outside the GstGLWindow::resize callback
  will not have the winsys' stack of viewports required to correctly
  place the output frame.

Provide a function to request a resize on the next draw event from the
winsys.

Also track size changes inside the base GstGLWindow class rather
than in each subclass.

https://bugzilla.gnome.org/show_bug.cgi?id=755111
 2017-12-09 19:32:08 +00:00
Matthew Waters
a18cdf4781 gl/x11: store the correct dimension from the resize events 
small typo s/width/height/
 2017-12-09 19:32:08 +00:00
Vineeth T M
6944433677 gl: Fix GError leaks during failures 
https://bugzilla.gnome.org/show_bug.cgi?id=755140
 2017-12-09 19:32:08 +00:00
Tim-Philipp Müller
990a49fe4f gl: bufferpool take into account video stride alignment requirements 
when allocating memory. Fixes crashes with avdec_h265 in the AVX2
code path which requires 32-byte stride alignment, but the
GstAllocationParams only specified a 16-byte alignment.

https://bugzilla.gnome.org/show_bug.cgi?id=754120
 2017-12-09 19:32:08 +00:00
Matthew Waters
5adde7f98b gl/api: use public rather than private define 
HAVE_IOS is only defined for the build of this module so
attempting to use gstgl in iOS would result in incorrect GL
includes.
Use GST_GL_HAVE_PLATFORM_EAGL instead for choosing the iOS GL
header.
 2017-12-09 19:32:08 +00:00
Sebastian Dröge
cd326adacc gl/eagl: Also unbind renderbuffer after setting up framebuffer 
https://bugzilla.gnome.org/show_bug.cgi?id=754757
 2017-12-09 19:32:08 +00:00
Sebastian Dröge
ae721c54c2 gl/eagl: Don't make context uncurrent just to make it current again in the next line 
Also binding the framebuffer again is unnecessary then as it was just bound a
few lines before while the context was current.

https://bugzilla.gnome.org/show_bug.cgi?id=754757
 2017-12-09 19:32:08 +00:00
Tim-Philipp Müller
06a1954165 gtk, qt, gl: fix typo in debug and error messages 2017-12-09 19:32:08 +00:00
Sebastian Dröge
3d4f982045 gl/eagl: Unref context after setting a window handle 
gst_gl_window_get_context() returns a new reference.

Hopefully fixes https://bugzilla.gnome.org/show_bug.cgi?id=753758
 2017-12-09 19:32:08 +00:00
Nicolas Dufresne
d1cece731e gl: Let base transform relay the meta api for us 
During allocation query, when this element is not passthrough, it must
relay the overlay compostion meta and it's parameters. Fortunatly, base
transform can do this for us.

https://bugzilla.gnome.org/show_bug.cgi?id=753850
 2017-12-09 19:32:08 +00:00
Justin Kim
c8628fc43d glcontext: add specific error message when missing GL_SHADING_LANGUAGE_VERSION 
GL_SHADING_LANGUAGE_VERSION was introduced since ES 2.0, but in some
android emulator doesn't support this feature. To prevent confusion for
developer, the error message need to be more clear.

https://bugzilla.gnome.org/show_bug.cgi?id=753905
 2017-12-09 19:32:08 +00:00
Matthew Waters
d45e0f807f glbasefilter: only call gl_{stop,start} if the context changed 
Removes the redundant GL object creation/deletion on every
decide_allocation call which is being called for every caps change.

Thus reduces the required GL state changes on reconfigure events
which are being sent by glimagesink/xvimagesink
 2017-12-09 19:32:08 +00:00
Nicolas Dufresne
edd3c007ea glupload: Recalculate offset and size in raw upload 
As we only expose the mapped portion of the frame into the GL
memory object (and not the original padding) we need to
re-calculate the size and offset.
 2017-12-09 19:32:08 +00:00
Nicolas Dufresne
9fd57c9a6c gloverlaycompositor: Also disable the blend when done 2017-12-09 19:32:07 +00:00
Nicolas Dufresne
a342d95ca6 glsink: Enable sync meta on pools we offer 
As the upload is asynchronous, we need to enable the sync meta to
gain correct rendering. The buffer pool receiver don't know about
that.
 2017-12-09 19:32:07 +00:00
Sebastian Dröge
db8bbe067b opengl: Change GLclampd to double 
GLclampd does not exist on GLES, only desktop GL.
 2017-12-09 19:32:07 +00:00
Martin Kelly
7d314dd2ad opengl: add missing ClearDepth prototype 
The ClearDepth call is missing.

https://bugzilla.gnome.org/show_bug.cgi?id=753639
 2017-12-09 19:32:07 +00:00
Nicolas Dufresne
f3bd3d0b94 gl: Add opengl_version.h to the list of sources 
Adding this private header to the list of sources. We don't want to make
this header public, but we need it in the list of sources otherwise it
won't be included in the tarball. This fixes make distcheck.

This regression was introduced by commit 1a6fe3db
 2017-12-09 19:32:07 +00:00
Matthew Waters
3ba30d42a4 gl: use gles2 shaders everywhere 
This effectively limits a glfilter subclass to be > GL(ES) 2.0.
rather than a possible GL 1.4.
 2017-12-09 19:32:07 +00:00
Matthew Waters
6589c38d1a glcontext/wgl: implement gl3 core profile context selection 2017-12-09 19:32:07 +00:00
Nicolas Dufresne
d576a71e9a gloverlaycompositor: Add shader to convert BGRA/ARGB -> RGBA 
Depending on the bytes order we will get BGRA (little) and ARGB (big)
from the composition overlay buffer while our GL code expects RGBA. Add
a fragment shader that do this conversion.

https://bugzilla.gnome.org/show_bug.cgi?id=752842
 2017-12-09 19:32:07 +00:00
Matthew Waters
9f9e0e87cf gl/syncmeta: implement synchronisation without glFenceSync 
Uses glFinish as that's the best we have for lesser OpenGL versions.
 2017-12-09 19:32:07 +00:00
Matthew Waters
2034f78617 context/glx: only use glXCreateContextAttribs for OpenGL 3 contexts 
mesa for example when creating a GL 3.1 compatibility context
overrides our context profile selection to create a core context.
 2017-12-09 19:32:07 +00:00
Sebastian Dröge
260104e485 glupload: Remove debug output from gst_gl_upload_transform_caps() 
We can't know if the GstGLUpload type is initialized at this point already,
and thus our debug category might not be initialized yet... and cause an
assertion here.

As we don't print debug output for any of the other transform functions, let's
defer this problem for now.
 2017-12-09 19:32:07 +00:00
Nicolas Dufresne
f8dbf10e9e glupload: Add fixme about using bufferpool for raw 
http://bugzilla.gnome.org/show_bug.cgi?id=752937
 2017-12-09 19:32:07 +00:00
Nicolas Dufresne
2b2048d601 glupload: Keep input frame mapped as long as needed 
When performing a raw upload, we need to keep the raw data mapped as
long as needed.

https://bugzilla.gnome.org/show_bug.cgi?id=752937
 2017-12-09 19:32:07 +00:00
Nicolas Dufresne
37cc53d26f Revert "glupload: memcpy on raw data upload" 
This reverts commit 82c0189b28.

https://bugzilla.gnome.org/show_bug.cgi?id=752937
 2017-12-09 19:32:07 +00:00
Matthew Waters
ab142b2671 glcontext/wgl: fix defenition of gst_gl_context_wgl_new 
gstglcontext_wgl.c: In function 'gst_gl_context_wgl_new':
gstglcontext_wgl.c:83:40: error: 'display' undeclared (first use in this function)
 2017-12-09 19:32:07 +00:00
Matthew Waters
0ac95e3243 gl/cocoa: fix definition of gst_gl_context_new 
gstglcontext_cocoa.m:75:1: error: conflicting types for 'gst_gl_context_cocoa_new'
 2017-12-09 19:32:07 +00:00
Matthew Waters
7acca333fe gl/win32: fix definition of gst_gl_window_win32_new 2017-12-09 19:32:07 +00:00
Matthew Waters
70184c52f0 wayland: fail window open if the display is the correct type 
Errors out cleanly if a wayland compositor is not running
 2017-12-09 19:32:07 +00:00
Matthew Waters
6ccaafc0f3 glwindow: pass display to implementation's _new() 
So they have to opportunity to fail if they cannot handle the
display connection.

https://bugzilla.gnome.org/show_bug.cgi?id=752743
 2017-12-09 19:32:07 +00:00
Matthew Waters
9587eb477d glcontext: pass display to implentation's _new() 
This allows the context to fail creation based on incompatible
display type's. e.g. glx context with an wayland display handle.

https://bugzilla.gnome.org/show_bug.cgi?id=752743
 2017-12-09 19:32:06 +00:00
Julien Isorce
738ed418ad gl: support cgl, egl and glx within a same build 
On osx, with the same build,
gst-launch-1.0 videotestsrc ! glimagesink works with:

GST_GL_PLATFORM=egl GST_GL_WINDOW=x11 GST_GL_API=gles2
GST_GL_PLATFORM=egl GST_GL_WINDOW=x11 GST_GL_API=opengl

GST_GL_PLATFORM=glx GST_GL_WINDOW=x11 GST_GL_API=opengl

GST_GL_PLATFORM=cgl GST_GL_WINDOW=cocoa GST_GL_API=opengl
GST_GL_PLATFORM=cgl GST_GL_WINDOW=cocoa GST_GL_API=opengl3

https://bugzilla.gnome.org/show_bug.cgi?id=752743
 2017-12-09 19:32:06 +00:00
Jan Schmidt
3bacd64bf1 glupload: Check that caps contain desired caps features 
Use 'contains' checks instead of equality checks on caps features
to allow for uploading when caps also contain GstVideoOverlayComposition
meta.

https://bugzilla.gnome.org/show_bug.cgi?id=752912
 2017-12-09 19:32:06 +00:00
Julien Isorce
ac469a0d28 gl: move GL_NUM_EXTENSIONS definition after gl.h 
https://bugzilla.gnome.org/show_bug.cgi?id=752743
 2017-12-09 19:32:06 +00:00
Luis de Bethencourt
1eeeadb24e glupload: fix memory leak 
GstCapsFeatures need to be freed with gst_caps_features_free() after use.

CID #1312136, CID #1312136
 2017-12-09 19:32:06 +00:00
Nicolas Dufresne
df7bcb6ba7 gloverlaycompositor: Keep memory pointer alive 
Keep the composition memory pointer alive while it's being
wrapped inside a GstGLMemory object.

https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Nicolas Dufresne
8884aeba87 gloverlaycompositor: Pass buffer stride 
The overlay pixel buffer stride was not given back
to the GL image.

https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Nicolas Dufresne
b0546f9bfa gloverlaycompositor: Hide GstCompsitionOverlay object 
This object is only used inside the compositor and does not
need to be expose in libgstgl API.

https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Nicolas Dufresne
9caaf9eb63 libgstgl: Makefile style fix 2017-12-09 19:32:06 +00:00
Nicolas Dufresne
1812c19291 composition-overlay: Positions are relative to texture 
The coordinate are relative to the texture dimension and not
the window dimension now. There is no need to pass the window
dimension or to update the overlay if the dimension changes.

https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Lubosz Sarnecki
8abd2bbe35 gloverlaycompositor: Create own shader object 
Make gloverlaycompositor independent of the shader used in the sink.

https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Luis de Bethencourt
3199b1b4a8 gloverlaycompositor: for loop initial declarations are only allowed in C99 mode 
Fixes compiler warnings
 2017-12-09 19:32:06 +00:00
Julien Isorce
f068020645 gl: use gst_gl_display_create_context in more elements. 
glbasefilter, glbasemixer and gltestsrc.

https://bugzilla.gnome.org/show_bug.cgi?id=750310
 2017-12-09 19:32:06 +00:00
Matthew Waters
11f058b1ca gl/build: fix typo in _HEADERS resulting in installing the wrong file 
/usr/include/gstreamer-1.0/gst/gl/gl.h:51:43: fatal error:
    gst/gl/gstgloverlaycompositor.h: No such file or directory
 2017-12-09 19:32:06 +00:00
Matthew Waters
41aeadc36e glcolorconvert: add RGB to NV12/NV21 conversion 2017-12-09 19:32:06 +00:00
Lubosz Sarnecki
26e6be8fad glcolorconvert: Apply GstVideoOverlayCompositionMeta buffer to converted buffer 
Since glcolorconvert creates a new GstBuffer,
without the GstVideoOverlayCompositionMeta data,
it needs to be copied to not be dropped.

https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Lubosz Sarnecki
076d0517c8 glupload: Detect overlay meta buffers correctly 
https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Lubosz Sarnecki
dc47e6d3c0 glimagesinkbin: Add GstVideoOverlayCompositionMeta caps features 
https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Lubosz Sarnecki
4d010efea1 gloverlaycompositor: Add GstGLOverlayCompositor class 
Manages the GstGLCompositionOverlay objects,
caches already uploaded overlays and draws them.

https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Lubosz Sarnecki
170ac41a87 glcompositionoverlay: Add compatibility for GL contexts without glGenVertexArrays 
https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:06 +00:00
Lubosz Sarnecki
279c2b07b4 glcompositionoverlay: Add class for managing GstVideoOverlayCompositionOverlay buffers 
Add a class to store and manage the OpenGL texture,
vertex buffer and GstVideoOverlayRectangle.
Transforms overlay coordinate space to vertex buffer space with aspect ratios in mind.

= Example Pipelines =

Simple pipeline

gst-launch-1.0 videotestsrc ! \
  textoverlay text="Hello World" font-desc="sans bold 30" ! \
  glimagesink

Display 3 static overlays at different positions

gst-launch-1.0 videotestsrc ! \
  textoverlay text="text1" valignment="top" font-desc="sans bold 30" ! \
  textoverlay text="text2" halignment="right" font-desc="sans bold 30" ! \
  textoverlay text="text3" halignment="left" font-desc="sans bold 30" ! \
  glimagesink

Display subtitle file over testsrc

gst-launch-1.0 videotestsrc ! \
  textoverlay name=foo filesrc location=foo.srt ! subparse ! queue ! foo. foo. ! \
  glimagesink

https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:05 +00:00
Lubosz Sarnecki
eb618aaac7 glupload: Move debug init to top of the file 
https://bugzilla.gnome.org/show_bug.cgi?id=745107
 2017-12-09 19:32:05 +00:00
Matthew Waters
1b4f99856f glmemory: check for pbo availability before attempting pbo download 
https://bugzilla.gnome.org/show_bug.cgi?id=751165
 2017-12-09 19:32:05 +00:00
Matthew Waters
66407b9877 glcontext: fix get_current_gl_api on x11/nvidia drivers 
They require to get_proc_address some functions through the
platform specific {glX,egl}GetProcAddress rather than the default
GL library symbol lookup.
 2017-12-09 19:32:05 +00:00
Matthew Waters
cfa9b94045 glcontext: consolidate get_proc_address function definition 
Pass the GstGLAPI directly.
 2017-12-09 19:32:05 +00:00
Matthew Waters
3343e2dccd glcontext/glx: try creating a context with the highest version 
nvidia drivers return the exact version in glGstString (GL_VERSION)
we request on creation so start with the highest known version and
work our way down.
 2017-12-09 19:32:05 +00:00
Matthew Waters
78957c45c2 glcontext: track sharedness with a cookie 
The previous approach of traversing the other_context weak ref tree was
1. Less performant
2. Incorrect for context destruction removing a link in the tree

Example of 2:
c1 = context_create (NULL)
c2 = context_create (c1)
c3 = context_create (c2)
context_can_share (c1, c3) == TRUE
context_destroy (c2)
unref (c2)
context_can_share (c1, c3) returns FALSE when it should be TRUE!

This does not remove the restriction that context sharedness can only
be tracked between GstGLContext's.
 2017-12-09 19:32:05 +00:00
Matthew Waters
2df7e0f9de glcontext: use the debug object variant for completeness 2017-12-09 19:32:05 +00:00
Matthew Waters
5043800a1d glupload: memcpy on raw data upload 
Anything else requires keeping track of the GstVideoFrame mapping
across possible multiple buffers to ensure correct data pointer
usage.
 2017-12-09 19:32:05 +00:00
Matthew Waters
841380e022 glbasebuffer: add some debug and zero the data pointers on init 2017-12-09 19:32:05 +00:00
Sebastian Dröge
cff2d74cd4 gl/eagl: Don't call anything synchronously from the main thread 
This will deadlock if the main thread is the one who creates the GstGLContext.
All things we call from the main thread should be possible from any thread.

https://bugzilla.gnome.org/show_bug.cgi?id=751101
 2017-12-09 19:32:05 +00:00
Matthew Waters
b7a3b54b2a download: only start a download transfer for sysmem caps features 2017-12-09 19:32:05 +00:00
Hyunjun Ko
f67eb2571d glsyncmeta: transform func: return FALSE if not supported or failed 
https://bugzilla.gnome.org/show_bug.cgi?id=751778
 2017-12-09 19:32:05 +00:00
Matthew Waters
6a7bb242f9 android: add missing egl.h include 2017-12-09 19:32:05 +00:00
Matthew Waters
afcb6aa1da gl: consolidate egl header includes to egl-only headers 
They may conflict with other headers.
 2017-12-09 19:32:05 +00:00
Julien Isorce
9b1eb32c49 gl: initialize output params to 0 before calling gl functions 
The client side API of the Chromium's GPU Process has asserts
in debug mode that check that output params are initialized to 0.
 2017-12-09 19:32:05 +00:00
Nicolas Dufresne
b8d3c2d2a5 gl: Don't leak pool if set_config failed 2017-12-09 19:32:05 +00:00
Nicolas Dufresne
79d5bbdc35 glfilter: Don't cache buffer pool 
Caching and sharing to multiple element the same pool prevents
renegotiation from passthrough to not passthrough.
 2017-12-09 19:32:05 +00:00
Sebastian Dröge
5df0fbfbca Revert "gl/window/x11: don't create our own X11 display" 
This reverts commit 5697b6b89b.

https://bugzilla.gnome.org/show_bug.cgi?id=751003
 2017-12-09 19:32:05 +00:00
Sebastian Dröge
30e13d6623 Revert "eagl: Don't dispatch_sync() to the main thread if we are on the main thread" 
This reverts commit 0bff481011.

It wasn't supposed to be merged and also doesn't fix the problem.
 2017-12-09 19:32:05 +00:00
Sebastian Dröge
c02891ba41 eagl: Don't dispatch_sync() to the main thread if we are on the main thread 
This will otherwise deadlock.

https://bugzilla.gnome.org/show_bug.cgi?id=751101
 2017-12-09 19:32:05 +00:00
John Ludwig
5e0b3b1c10 gl: Include texParameterf in the GL function table 
https://bugzilla.gnome.org/show_bug.cgi?id=751228
 2017-12-09 19:32:05 +00:00
Julien Isorce
1edc569069 glmemory: fix consistency about pbo availability. 
https://bugzilla.gnome.org/show_bug.cgi?id=751165
 2017-12-09 19:32:04 +00:00
Julien Isorce
76983d4454 gldisplay: add gst_gl_display_create_context 
It also emits a create-context signal so that an application
can provide an external GstGLContext backend.

https://bugzilla.gnome.org/show_bug.cgi?id=750310
 2017-12-09 19:32:04 +00:00
Julien Isorce
38a1939ea1 glcontext: move display from priv 
https://bugzilla.gnome.org/show_bug.cgi?id=750310
 2017-12-09 19:32:04 +00:00
Julien Isorce
cbc3f1242f Revert "glcontext: add gst_gl_context_set_display helper" 
This reverts commit 71b8103cbd.
 2017-12-09 19:32:04 +00:00
Julien Isorce
e29e67fa6e Revert "gl: add GstGLContextGPUProcess backend" 
This reverts commit b377112ee3.
 2017-12-09 19:32:04 +00:00
Nicolas Dufresne
2c1d4f4074 glviewconvert: Fix GLES2 compatibility 2017-12-09 19:32:04 +00:00
Nicolas Dufresne
7605b39eea glviewconvert: Fix broken validity check 2017-12-09 19:32:04 +00:00
Jan Schmidt
7b583526e9 gl libs: Add glviewconvert helper object 
Add API for a helper object that can convert between different
stereoscopic video representations, and later do filtering
of multiple view streams.

https://bugzilla.gnome.org/show_bug.cgi?id=611157
 2017-12-09 19:32:04 +00:00
Matthew Waters
2210ba5d46 glmemory: separate pbo transfer from texture transfers 
When supported, the potentially longer pbo upload/download can be
initiated before the texture upload/download, potentially increasing
throughput.
 2017-12-09 19:32:04 +00:00
Matthew Waters
900bcea9de glmemory: implement on top of glbasebuffer 
Provides convenient access to PBO usage.

Currently texture updates are coupled tightly to data transfers.
 2017-12-09 19:32:04 +00:00
Matthew Waters
1e87053475 gl: new glbasebuffer GstMemory object 
Provides generic handling of GL buffer objects accessible using
the GL bind points (GL_ARRAY_BUFFER, GL_PIXEL_*_BUFFER).

Implementation based off the current GstGLMemory.
 2017-12-09 19:32:04 +00:00
Matthew Waters
c9d99be28c gl/prototypes: add some buffer function prototypes 2017-12-09 19:32:04 +00:00
Matthew Waters
9900928403 gl/window/x11: only listen on the X Display when needed 
5697b6b89b causes us to possibly listen
on a toolkit provided Display connection.  We thus could eat their
precious winsys events.  Only listen if we need to
(!foreign_display or videooverlay).
 2017-12-09 19:32:04 +00:00
Jan Schmidt
8a1fc4ab4e gl: Add support for multiple views in upload, colour convert and download 
Support multiple attached views on input/output buffers
by processing each one, not just the first.
 2017-12-09 19:32:04 +00:00
Matthew Waters
1f7025c585 gl/window/x11: don't create our own X11 display 
It's not needed anymore with most window operations occuring in the
GL thread.
 2017-12-09 19:32:04 +00:00
Matthew Waters
e37cf3c55f gl/window/x11: handle_events() may be called before the window has been created 
Fixes an XIO fatal error
 2017-12-09 19:32:04 +00:00
Sebastian Dröge
1a995d1676 gl: OES_vertex_array_object is improperly implemented on PowerVR SGX 544MP 
https://bugzilla.gnome.org/show_bug.cgi?id=750185
 2017-12-09 19:32:03 +00:00
Thiago Santos
33b5cd5426 Fix a common typo: retreive -> retrieve 
Seems to have been copy pasted around a few places
 2017-12-09 19:32:03 +00:00
Philippe Normand
deedbd799c gl/dispmanx: Fix build 2017-12-09 19:32:03 +00:00
Matthew Waters
5404083158 gl/window/dispmanx: fix compiler warning 2017-12-09 19:32:03 +00:00
Matthew Waters
bb1de83ff2 gl/window: use the default main loop implementation for all backends 
fixes glimagsink being unable to display.

https://bugzilla.gnome.org/show_bug.cgi?id=750337
 2017-12-09 19:32:03 +00:00
Julien Isorce
9ac4280052 glwindow_cocoa: use parent default implementation 
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=750337
 2017-12-09 19:32:03 +00:00
Jan Schmidt
f6a102c3e5 glsyncmeta: Set new sync point when copying 
Set a new sync point when copying instead of
transferring the (non-refcounted) GL sync object
from the source meta.

https://bugzilla.gnome.org/show_bug.cgi?id=750279
 2017-12-09 19:32:03 +00:00
Jan Schmidt
7a288b0189 glsyncmeta: Add some debug output 2017-12-09 19:32:03 +00:00
Matthew Waters
fd7348d064 glmemory: provide compatibility definition for GLES2 for GL_RGBA8 2017-12-09 19:32:03 +00:00
Matthew Waters
1e9f7b6303 gl: consolidate internal_rgba_format into glmemory 
Expose some useful value format conversion functions available in
GstGLMemory.
 2017-12-09 19:32:03 +00:00
Julien Isorce
f8ebadabcd glcontext_gpu_process: close the window when done 2017-12-09 19:32:03 +00:00
Julien Isorce
62130b34ff glwindow_gpu_process: avoid empty struct 2017-12-09 19:32:03 +00:00
Julien Isorce
210d2c2825 glwindow: move main loop/context creation back to init/finalize 
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=750199
 2017-12-09 19:32:03 +00:00
Sebastian Dröge
7ae1efa8b3 gl: Fix compiler warning 
gstglwindow_wayland_egl.c:246:41: error: unused variable 'surface_listener' [-Werror,-Wunused-const-variable]
static const struct wl_surface_listener surface_listener = {
                                        ^
 2017-12-09 19:32:03 +00:00
Matthew Waters
fea0b65eb5 glwindow: fix compiler error 
gstglwindow.c:1118:544: error: 'return' with no value, in function returning non-void [-Werror]
   g_return_if_fail (GST_GL_IS_WINDOW (window));
 2017-12-09 19:32:03 +00:00
Matthew Waters
33d8bbaea4 gl/wayland: implement setting the render rectangle 
Places our subsurface at the rectangle provided position
 2017-12-09 19:32:03 +00:00
Matthew Waters
6c56aba687 glwindow: handle gst_video_overlay_set_render_rectangle 2017-12-09 19:32:03 +00:00
Matthew Waters
8332b1abe8 gl/wayland: don't block the event loop after poll 
Use the dispatch_pending set of functions which just run the currently
queued up events instead of potentially waiting for an event to occur.
 2017-12-09 19:32:03 +00:00
Matthew Waters
54199ea203 gl/wayland: implement basic video overlay support via subsurfaces 
Currently does not position the subsurface relative to the parent surface at all
 2017-12-09 19:32:03 +00:00
Matthew Waters
8404981dfb gl/wayland: allow a NULL wl_event_queue 
perform operations on the default wl_display event queue in that case
 2017-12-09 19:32:03 +00:00
Matthew Waters
79f4a5fcf3 gl/utils: implement wayland display GstContext 
requried for sharing GL contexts or subsurface support
 2017-12-09 19:32:03 +00:00
Matthew Waters
00cff1f9e4 gl/wayland: run each window on a separate queue 
Based on patch by Julien Isorce <julien.isorce@collabora.co.uk>

https://bugzilla.gnome.org/show_bug.cgi?id=709747
 2017-12-09 19:32:03 +00:00
Jan Schmidt
0f6b04c91d gl: Don't leak temp strings in _RGB_pixel_order() 
Fix a memory leak of temporary strings when computing
swizzling of RGB formats.
 2017-12-09 19:32:03 +00:00
Jan Schmidt
5007311198 glfilter: Add transform_internal_caps() vfunc 
Add a vfunc that is called by glfilter before it sets
caps features and intersects with the peer caps, and
move removing the size from caps into its default
implementation. Allows sub-classes to do more
sophisticated management of the size fields in case they
don't support arbitrary resizing or have distinct
preferences.
 2017-12-09 19:32:03 +00:00
Jan Schmidt
697107fe7d glfilter: Don't remove size fields from caps 
Instead of removing size fields, set them to the full range
like videoscale does, so the caps are clearly unfixed in
all cases.
 2017-12-09 19:32:03 +00:00
Julien Isorce
238edceda4 gl: add GstGLContextGPUProcess backend 
It builds its GL vtable from a proc address provided
by the application.
 2017-12-09 19:32:02 +00:00
Julien Isorce
fce0e0ba3c gl: add and use gst_gl_internal_format_rgba 
Previously when compiling GstGL with both GL and GLES2,
GL_RGBA8 was picked from GL/gl.h. But a clash may happen at
runtime when one is selecting GLES2.

gst_gl_internal_format_rgba allows to check at runtime
if it should use GL_RGBA or GL_RGBA8.
 2017-12-09 19:32:02 +00:00
Julien Isorce
2efeb71c83 glwindow_x11: use parent default implementation 2017-12-09 19:32:02 +00:00
Julien Isorce
fa7aafb4ff glcontext_glx: rename variable from window to context 2017-12-09 19:32:02 +00:00
Julien Isorce
01961ec44d glwindow: initialize debug in class_init 
Useful if one uses gst_gl_window_x11_new directly
instead of gst_gl_window_new.
 2017-12-09 19:32:02 +00:00
Julien Isorce
a81de2f282 glcontext: initialize debug in class_init 
Useful if one uses gst_gl_context_egl_new directly
instead of gst_gl_context_new.
 2017-12-09 19:32:02 +00:00
Julien Isorce
5849a9f657 glcontext: add gst_gl_context_set_display helper 2017-12-09 19:32:02 +00:00
Julien Isorce
bad3e16601 glcontext: add missing _CAST after G_TYPE_CHECK_CLASS 2017-12-09 19:32:02 +00:00
Julien Isorce
78ca5ce1c4 glwindow: add missing _CAST after G_TYPE_CHECK_CLASS 2017-12-09 19:32:02 +00:00
Julien Isorce
2472bcaaa6 glwindow: provides some default implementations to factorize with all backends 2017-12-09 19:32:02 +00:00
Xavier Claessens
840157230d gl: propagate return value from filter and filter_texture 
https://bugzilla.gnome.org/show_bug.cgi?id=749846
 2017-12-09 19:32:02 +00:00
Matthew Waters
4e58ec83e0 gl/wayland: remove dead event source code 2017-12-09 19:32:02 +00:00
Matthew Waters
9f704d7c2d gl/wayland: add GstGLDisplayWayland 
Simple implementation split from GstGLWindowWayland

Can now have multiple glimagesink elements all displaying output
linked via GL or otherwise (barring GL platform limitations).

The intel driver is racy and can crash setting up the two glimagesink contexts.

e.g.
videotestsrc ! tee name=t ! queue ! glupload ! glimagesinkelement
  t. ! queue ! gleffects_blur ! glimagesinkelement

videotestsrc ! glupload ! glfiltercube ! tee name=t ! queue ! glimagesinkelement
  t. ! queue ! gleffects_blur ! glimagesinkelement
 2017-12-09 19:32:02 +00:00
Matthew Waters
eba6f6b80f gl/calayer: provide the exact GL api version for the wrapped context 
Otherwise we could end up being mistaken for the diference between a
gl3 and a gl2 context resulting in a failure getting the list of
extensions from the wrapped context due to the difference between
glGetString and glGetStringi for the GL_EXTENSIONS token.

https://bugzilla.gnome.org/show_bug.cgi?id=749728
 2017-12-09 19:32:02 +00:00
Xavier Claessens
6db457a7d9 gl: win32: do not call SetParent in release_parent_win_id() 
When called from gst_gl_window_win32_close(), internal window
could not exist, and if it does it's going to be destroyed just
after that anyway. Also it causes window_proc() to be called
and crash because it gets a NULL context.

When called from gst_gl_window_win32_set_window_handle() we are
going to set another parent anyway, and it's probably better to
reparent directly instead of passing by a NULL parent which could
cause the internal window to popup briefly.

https://bugzilla.gnome.org/show_bug.cgi?id=749601
 2017-12-09 19:32:02 +00:00
Xavier Claessens
1d9ccc2189 gl: win32: remove unused code 
https://bugzilla.gnome.org/show_bug.cgi?id=749601
 2017-12-09 19:32:02 +00:00
Xavier Claessens
77e1e70fdc gl: win32: fix crash when finalizing GstGLContext 
gst_gl_context_finalize() is calling gst_gl_window_win32_quit()
which was posting a message. But then window_proc takes window's
context and get a NULL.

Now that we've got a GMainLoop we can do like other backends and
simply call g_main_loop_quit().

This also remove duplicated code to release the parent window and
potential crash there because parent_proc could be NULL if we never
created the internal window. That could happen for example if setting
state to READY then setting a window_handle, and go back to NULL state.

https://bugzilla.gnome.org/show_bug.cgi?id=749601
 2017-12-09 19:32:02 +00:00
Xavier Claessens
db0380a9ee gl: win32: Fix leaked GstGLContext 
https://bugzilla.gnome.org/show_bug.cgi?id=749601
 2017-12-09 19:32:02 +00:00
Xavier Claessens
8f268785d6 gl: win32: set the parent window when creating internal window 
When _set_window_handle() was called in READY state, it wasn't
set to the internal window created later.

https://bugzilla.gnome.org/show_bug.cgi?id=749601
 2017-12-09 19:32:02 +00:00
Xavier Claessens
886ea15c52 gl: win32: use a GMainContext to dispatch win32 messages 
gst_gl_window_win32_send_message_async() could be called before the
internal window is created so we cannot use PostMessage there.

x11 and wayland backends both create a custom GSource for this,
so there is no reason to not do that for win32.

https://bugzilla.gnome.org/show_bug.cgi?id=749601
 2017-12-09 19:32:02 +00:00
Jan Schmidt
95b08b75ba glupload: Don't leak all memory uploaded via raw uploads. 
Remove an extra ref missed when switching over to not
reusing output textures
 2017-12-09 19:32:02 +00:00
Matthew Waters
d4894caacf glcontext: require a shader version to initialize. 
It's very near pointless to try our GL implementation without shaders.

https://bugzilla.gnome.org/show_bug.cgi?id=749284
 2017-12-09 19:32:02 +00:00
Xavier Claessens
80fab54c0a gl: fix crash on windows with intel driver 
https://bugzilla.gnome.org/show_bug.cgi?id=749430
 2017-12-09 19:32:01 +00:00
Matthew Waters
e8e84cf6b3 gl/calayer: provide a current wrapped GstGLContext for callbacks 
So that the draw and resize callbacks can get the current GstGLContext.
 2017-12-09 19:32:01 +00:00