This adds a check for the glsl version during driver init which gets
stored in ctx->glsl_major and ctx->glsl_minor.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 9bde48bda6d602dd536c3536d56d2ff7545802c3)
This splits out the GL version parser code from
cogl-driver-gl.c:_cogl_get_gl_version() so it can also be used for
parsing other gl version strings.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 66c2e74b9d61669fb5b93cf9a31cc8659a601fdd)
The function pointer for texture_2d_get_data in the driver vtable was
expecting an unsigned int for the rowstride but the definition in
cogl-texture-2d-gl.c took a size_t so it was giving an annoying
warning. This normalizes them both to just take an int. This seems to
better match the pattern used for cogl_bitmap_new_from_data and
cogl_texture_2d_new_from_data.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 003f080531d5368835081568779b031ef4f09a77)
This adds a new "fixed-arbfp" progend so we now have 3 distinct ways of
setting up the state of a pipeline:
» fixed; where the vertex and fragment processing are implemented
using fixed function opengl apis.
» fixed-arbfp; where vertex processing is implemented using fixed
function opengl apis but fragment processing is implemented
using the ARB Fragment Processing language.
» glsl; there vertex and fragment processing are both implemented
using glsl.
This means we avoid unusual, combinations such as glsl for vertex
processing and arbfp for fragment processing, and also avoid pairing
fixed-function vertex processing with glsl fragment processing which we
happen to know hits some awkward code paths in Mesa that lead to poor
performance.
As part of this change, the progend now implies specific vertend and
fragend choices so instead of associating a vertend and fragend with a
pipeline we now just associate a progend choice.
When flushing a pipeline and choosing what progend to use, we now call a
progend->start() method that is able to determine if the vertend and
fragend together will be able to handle the given pipeline so the
vertend and fragend ->start() methods no longer need to return a boolean
status.
Since we now don't need to support glsl used in conjunction with fixed
function this will allow us to avoid ever using OpenGL builtin attribute
names, though this patch doesn't change that yet.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit cec381f50c7a2f2186bd4a8c5f38fecd5f099075)
There is some fairly awkward #ifdefing to determine which vertends,
fragends and progends are available at build time. This patch
consolidates the #ifdefing of vertend, fragend and progend defines to
make for slightly easier reading.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 098d6244bf7c8f2a4ca24206c6e8271d589ed4c9)
There was a spurious duplication of the COGL_PIPELINE_VERTEND_DEFAULT
and COGL_PIPELINE_VERTEND_UNDEFINED defines which this patch removes.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 1bcf34bd3eb0134b7ef1b30cba91d3e70a23e5ed)
The COGL_PIPELINE_FRAGEND_XYZ_MASK and COGL_PIPELINE_VERTEND_XYZ_MASK
defines aren't used any more so this patch simply removes them.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 119b0d771a4be2550ce1ca1e789db5b22776b066)
This removes an optimization that I added at some point, which I'm
pretty certain I only added on a hunch. Reading the description I'm not
really convinced it makes sense to do this given that the fixed vertend
and fragend are currently listed before the glsl vertend and fragend in
the order that we look for a suitable backend. This means unless the
pipeline depends on glsl (e.g. due to an associated snippet) we would
reselect the fixed backend anyway, and if it really did depend on glsl
then we'd notice when we come to flush and switch backends there any way.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 071698d2c017af33e41b838429d514f5df5e02a1)
As part of an on-going effort to be able to support non-opengl drivers
for Cogl this splits out the opengl specific code from cogl-buffer.c
into driver/gl/cogl-buffer-gl.c
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 4d7094a979ff2cbbe4054f4a44ca05fc41a9e447)
The buffer and bitmap _bind() functions are GL specific so to clarify
that, this patch adds a _gl infix to these functions, though it doesn't
yet move the implementations out into gl specific files.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 6371fbb9637d88ff187dfb6c4bcd18468ba44d19)
This moves the decision about whether a buffer should be allocated using
malloc or not into cogl-buffer.c closer to the driver since it seem
there could be other driver specific factors that might also influence
this choice that we don't currently consider.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 06d46f10bf755d3009c28904e616a0adb4586cf5)
As part of an on-going effort to enable non-opengl drivers for Cogl this
splits out the opengl specific code in cogl-clip-stack.c into
cogl/driver/cogl-clip-stack-gl.c
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit acf989f1bb628282c53d1249b2e3fc6f6579f1e9)
This adds a new "nop" driver that does nothing. This can be selected at
runtime either with the COGL_DRIVER=nop environment variable or by
passing COGL_DRIVER_NOP to cogl_renderer_set_driver()
Adding the nop driver gives us a way to test workloads without any
driver and hardware overheads which can help us understand how Cogl's
state tracking performs in isolation.
Having a nop driver can also serve as an shell/outline for creating
other drivers later.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 90587418233b6438290741d80aedf193ae660cad)
As part of an on-going effort to enable non-opengl drivers for Cogl this
splits out the GL specific code in cogl-attribute.c into
cogl/driver/gl/cogl-attribute-gl.c
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 7e20c39c47fa176aa5062867ff273bc2c41a2f22)
As part of an on-going effort to avoid depending on a global Cogl
context cogl-blit.c now finds the context by looking at
data->src_text->context instead of using the _COGL_GET_CONTEXT macro.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 3f2c99150494efc04487d0dbd17980bac20e4485)
This factors out all of the OpenGL specific code in cogl-texture-2d.c
into cogl-texture-2d-gl.c and where necessary adds indirection through
the CoglDriver vtable so that we can eventually start to experiment with
non-OpenGL backends for Cogl.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit ec57588671696bbe7ce714bdfe7324236146c9c0)
This renames the set_filters and set_wrap_mode_parameters texture
virtual functions to gl_flush_legacy_texobj_filters and
gl_flush_legacy_texobj_wrap_modes respectively to clarify that they are
opengl driver specific and that they are only used to support the legacy
opengl apis for setting filters and wrap modes where the state is
associated with texture objects instead of being associated with sampler
objects.
This part of an effort to clearly delimit our abstraction over opengl so
that we can start to consider non-opengl backends for Cogl.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 6f78b8a613340d7c6b736e51a16c625f52154430)
If we're using the system glib library then we need to make sure not to
include headers under deps/glib otherwise we end up with with
incompatible typedefs that break the build.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 5d5fc97b59951ec56a4193b7ee7909ebd3cfbb94)
This commit pushes --disable-glib to the extreme of embedding the par of
glib cogl depends on in tree to be able to generate a DSO that does not
depend on an external glib.
To do so, it:
- keeps a lot of glib's configure.ac in as-glibconfig.m4
- pulls the code cogl depends on and the necessary dependencies
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Although we use GLib internally in Cogl we would rather not leak GLib
api through Cogl's own api, except through explicitly namespaced
cogl_glib_ / cogl_gtype_ feature apis.
One of the benefits we see to not leaking GLib through Cogl's public API
is that documentation for Cogl won't need to first introduce the Glib
API to newcomers, thus hopefully lowering the barrier to learning Cogl.
This patch provides a Cogl specific typedef for reporting runtime errors
which by no coincidence matches the typedef for GError exactly. If Cogl
is built with --enable-glib (default) then developers can even safely
assume that a CoglError is a GError under the hood.
This patch also enforces a consistent policy for when NULL is passed as
an error argument and an error is thrown. In this case we log the error
and abort the application, instead of silently ignoring it. In common
cases where nothing has been implemented to handle a particular error
and/or where applications are just printing the error and aborting
themselves then this saves some typing. This also seems more consistent
with language based exceptions which usually cause a program to abort if
they are not explicitly caught (which passing a non-NULL error signifies
in this case)
Since this policy for NULL error pointers is stricter than the standard
GError convention, there is a clear note in the documentation to warn
developers that are used to using the GError api.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit b068d5ea09ab32c37e8c965fc8582c85d1b2db46)
Note: Since we can't change the Cogl 1.x api the patch was changed to
not rename _error_quark() functions to be _error_domain() functions and
although it's a bit ugly, instead of providing our own CoglError type
that's compatible with GError we simply #define CoglError to GError
unless Cogl is built with glib disabled.
Note: this patch does technically introduce an API break since it drops
the cogl_error_get_type() symbol generated by glib-mkenum (Since the
CoglError enum was replaced by a CoglSystemError enum) but for now we
are assuming that this will not affect anyone currently using the Cogl
API. If this does turn out to be a problem in practice then we would be
able to fix this my manually copying an implementation of
cogl_error_get_type() generated by glib-mkenum into a compatibility
source file and we could also define the original COGL_ERROR_ enums for
compatibility too.
Note: another minor concern with cherry-picking this patch to the 1.14
branch is that an api scanner would be lead to believe that some APIs
have changed, and for example the gobject-introspection parser which
understands the semantics of GError will not understand the semantics of
CoglError. We expect most people that have tried to use
gobject-introspection with Cogl already understand though that it is not
well suited to generating bindings of the Cogl api anyway and we aren't
aware or anyone depending on such bindings for apis involving GErrors.
(GnomeShell only makes very-very minimal use of Cogl via the gjs
bindings for the cogl_rectangle and cogl_color apis.)
The main reason we have cherry-picked this patch to the 1.14 branch
even given the above concerns is that without it it would become very
awkward for us to cherry-pick other beneficial patches from master.
GKeyFile is a bit too much to import in a standalone build for my taste
as it depends on the encoding part of glib.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 9af04f0d8813b7f6f7117e1cc2a38ae2b8d04cdd)
--disable-glib also defines COGL_HAS_GTYPE_SUPPORT to #ifdef out GType
support in cogl. This also means we don't want to initialize glib's type
system in that case.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 67ad777099d62bdbc8515f6ee58ed80429cc6496)
As part of an effort towards being able to write non-opengl based
backends for Cogl this moves most of the opengl specific code under
drivers/gl. drivers/gl and drivers/gles have been moved to
drivers/gl/gl and drivers/gl/es respectively.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 7dc482facb0a265c7f48660079e7e12dd7a2813e)
Clean compiler output is a must! that also means imported source code
from other projects. I can't be bothered to submit a patch upstream,
because last time it was totally ignored by the stb_image guy.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit b43b1eac77e2f13d126e2211e12dc0c6d152716e)
As Cogl is not thread safe, we don't really need a thread safe
cogl_init() function.
This also reduces the amount of dependency cogl has on glib, handy when
we want to create a standalone version of cogl, some day.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 429e49e3028a425eb198d8969dfbf57790e2e72a)
This type is not documented and is experimental. We don't use
COGL_RENDERER_ERROR_NOT_FOUND and it's pretty vague anyway, just remove
it.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit ffa78534616547b9bd4cd5c0ade8fdc039a2b977)
These days cogl/ has a non-recursive Makefile.am and an old one was
still present in cogl/driver.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit e1db8e38be72f5372e9d7571a3faec5039e0e6d0)
As a convenience for debugging this adds a cogl_debug_matrix_print
function that prints out the components of a matrix and any internal
flags associated with the given matrix.
(cherry picked from commit 3b33889ff1204f19347a9548320ba95baa54c18c)
This adds a new public cogl_texture_rectangle_new_from_foreign()
function so that we can look at removing the generic
cogl_texture_new_from_foreign().
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit af02792b336bb492c5bd11afc34a5dcd417503f6)
To delimit which symbols were considered experimental we used to use
some preprocessor defines to gives experimental symbols an _EXP suffix
so that anyone monitoring the ABI for changes would easily be able to
discount changes made to clearly experimental functions.
These days we simply rely on the gtk-doc "Stability: unstable"
annotation to serve this purpose because changing the actual symbol name
made it slightly more awkward to debug Cogl using GDB and was an extra
mechanical step we decided we could do without.
This patch removes the last remaining _EXP suffix defines in Cogl
(cherry picked from commit 5a1c4a979e00accd492097cfb8f6a8d0fd8331bc)
This splits out most of the OpenGL specific code from cogl-framebuffer.c
into cogl-framebuffer-gl.c and extends the CoglDriverVtable interface
for cogl-framebuffer.c to use.
There are hopes to support several different backends for Cogl
eventually to hopefully get us closer to the metal so this makes some
progress in organizing which parts of Cogl are OpenGL specific so these
parts can potentially be switched out later.
The only remaining use of OpenGL still in cogl-framebuffer.c is to
handle cogl_framebuffer_read_pixels.
This commit introduces some new framebuffer api to be able to
enable texture based depth buffers for a framebuffer (currently
only supported for offscreen framebuffers) and once allocated
to be able to retrieve the depth buffer as a texture for further
usage, say, to implement shadow mapping.
The API works as follow:
* Before the framebuffer is allocated, you can request that a depth
texture is created with
cogl_framebuffer_set_depth_texture_enabled()
* cogl_framebuffer_get_depth_texture() can then be used to grab a
CoglTexture once the framebuffer has been allocated.
glBlitFramebuffer is affected by the scissor so we need to ensure
there is an empty clip flushed before using it. This is similar to
what is done in _cogl_blit_framebuffer().
https://bugzilla.gnome.org/show_bug.cgi?id=690451
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Tested-by: Aaron Plattner <aplattner@nvidia.com>
(cherry picked from commit 65da3f88af9c7b8d72758d116c2652aff68195c1)
The automagic paragraph support of gtk-doc is way too simple to support
things like multi-paragraphs <note>s. Let's trick gtk-doc and make it
generate a valid docbook snippet for cogl-context.
Without this, cogl-context remains absent of the reference
documentation, how sad is this?!
(cherry picked from commit 606b472d91450e3221da6631020f534892e866a9)
Checking whether src_rgb != src_alpha twice is pointless; not checking
whether dst_rgb != dst_alpha is clearly wrong.
Found by Coverity.
Signed-off-by: Adam Jackson <ajax@redhat.com>
https://bugzilla.gnome.org/show_bug.cgi?id=689850
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit fc292c25db3004543e277d92693ab9cb388d2121)
vtable
(Sorry, I had to re-apply Neil's patch as the original one somehow did
not apply)
The function prototypes for the GL functions in CoglContext have the
GLAPIENTRY attribute which on Windows makes them use the stdcall
calling convention. The function pointers exposed from cogl-gles2.h
don't have GLAPIENTRY so they end up having a different calling
convention on Windows. When Cogl is compiled there it ends up giving a
lot of warnings because it assigns a pointer to an incompatible
function type.
We probably don't want to make the functions exposed in cogl-gles2.h
use the stdcall calling convention because we control that API so
there is no need to introduce a second calling convention. The GLES2
context support currently isn't going to work on Windows anyway
because there is no EGL or GLES2 implementation.
Eventually if we make the Cogl GLES2 context virtualized on top of
Cogl then we will provide our own implementations of all these
functions so we can easily keep the C calling convention even on
Windows.
Until then to avoid the warnings on Windows we can just cast the
function pointers temporarily to (void*) when filling in the vtable.
This will also fix the build on Windows using Visual Studio, as it is
more picky on calling convention mismatches.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The ‘length’ for the swap chain is initially -1 which is supposed to
mean ‘no preference’. However, both of the SDL winsys's were
explicitly setting the SDL_GL_DOUBLEBUFFER attribute to zero in that
case which would try to disable double buffering.
On OS X, the equivalent to eglSwapBuffers (ie, [NSOpenGLContext
flushBuffer]) does nothing for a single buffer context. The
cogl-sdl-hello example does not specify the swap chain length so
presumably it would end up with a single buffer config. When
cogl_onscreen_swap_buffers is called it therefore does nothing and
nothing is painted.
I guess to make single-buffered contexts actually useful we should
expose some public equivalent to glFlush so that you can ensure the
rendering commands will actually hit the buffer. Alternatively we
could document that cogl_onscreen_swap_buffers performs this task on
single-buffered configs and then we could make the SDL winsys
explicitly call glFlush in that case.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 71e57f99002d5dee79bbd44b3bc57712b99acb55)
Previously when pushing the GLES2 context with an onscreen framebuffer
it would just call bind_onscreen. This actually binds it with Cogl's
context so presumably the context isolation wasn't working properly.
This patch splits out bind_onscreen to have a second function called
bind_onscreen_with_context that explicitly takes the EGL context to
use. Cogl now uses this when pushing the GLES2 context.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 3653c5b10058a3f79900eb2644cb30f4cf1ca47e)
There was a FIXME comment about making glCopyTex{Sub,}Image2D work
with CoglOffscreen buffers. This has already been fixed so we should
remove the comment.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 750e5668ee64a315c8090dd2223334b1e04bee54)
Previously, Cogl was advertising the GLES2 context feature whenever
the EGL winsys was used, even if the winsys was used with the GL
driver. This wasn't working because when the GL context is created the
API is set to GL with eglBindAPI and it is never changed back to GLES
when the GLES2 context is created. That meant that the created context
is actually GL not GLES2. Any rendering would then fail because the GL
context does not understand the precision statement.
It could be possible to fix it so that it will set the API correctly
before creating the context. It would then also need to reset the API
and unbind the previous context whenever switching between GLES2 and
GL contexts. If the context isn't unbound first then eglMakeCurrent
will actually try to bind both contexts at the same time and at least
Mesa detects this situation and reports that the two contexts
conflict. Presumably we would also need to do something more clever
when we retrieve the function pointers for the GLES2 context.
Currently we just copy them from the CoglContext but if the context is
using the GL driver then this would mean the functions came from libGL
not libGLESv2.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 624dea207cf76ae9ccd7f57c4ebd15d3bd65bff0)
The list of extension names in COGL_EXT_BEGIN should be a zero
separated list of strings which is terminated by an empty string. The
name for the GL_ARB_shader_objects extension was missing the zero
separator so presumably it was relying on the following byte to happen
to be a zero in order not to crash.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit f63381f23fa8b0b17e030561940b8a38efff221f)
Previously when Cogl detects that the GLX context is indirect it
resets the function pointers for the VBLANK_COUNTER feature to NULL.
However it wasn't removing the VBLANK_COUNTER feature flag. Some other
parts of the winsys check for that feature flag rather than checking
whether the pointer is NULL so it would end up calling an invalid
function pointer and crashing. This just fixes it to also clear the
feature flag.
https://bugzilla.gnome.org/show_bug.cgi?id=684917
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit e947c713a541086f80a308d22774229f0720196a)
Link to SDL.lib and SDLmain.lib if Cogl was built with the SDL winsys.
Recent changes to the SDL winsys introduced a direct dependency to
SDLmain.lib (and hence SDL.lib) when programs are built, causing linker
errors to appear when any programs using cogl (with the SDL winsys built
in) are built.
Since we cannot determine whether a Cogl build is built with the SDL winsys
at build time easily, we could use #pragma comment (lib, ...) whenever
cogl-sdl.h is included by cogl.h so that SDLmain.lib and SDL.lib is linked
into the resulting binary, so that the program can link and run correctly.
This does not add any external dependencies as the Cogl DLL already depends
on SDL.dll when it is built with the SDL winsys.
We don't need to split the wrapper snippet into two separate parts
because it should be ok to declare the flip uniform in the middle of
the shader as long as it is somewhere in the global scope. Therefore
we can just declare it right before the definition for the replacement
main function. This is important because we don't want to put anything
at the top of the application's shader in case it is using a
'#version' directive. In that case moving it to anything other than
the first line would break things.
This patch also adds a marker in a comment around the wrapper snippet
so that we can easily locate the snippet when glGetShaderSource is
called and remove it.
The wrapper for glGetAttachedShaders has been removed because there
are no longer any additional shaders attached to the program so we can
just let GL handle it directly.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit dbd92e24ae61dcbe7ef26f61c9117c5516a7fa87)
In our wrapper for glShaderSource we special case when a vertex shader
is being specified so we can sneak in a wrapper for the main function to
potentially flip all rendering upside down for better integration with
Cogl.
Previously we were appending the wrapper to all the sub-strings passed
via the vector of strings to glShaderSource but we now grow the vector
instead and insert the prelude and wrapper strings into the beginning
and end of the vector respectively so we should only have one copy for a
single shader.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit d2904d518718e3fbf4441abe2c2bcfd63edfd64b)
The SGX GLSL compiler refuses to accept shaders of the form:
void foo();
void bar() {
foo();
}
where foo is undefined at glShaderSource() time, left for definition at
link time. To work around this, simply append the wrapper shader to
user shaders, rather than building a separate shader that's always
linked with user shaders.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 96f02c445f763ace088be71dc32b3374b2cdbab2)
Mesa now reports a vendor string of "Mesa Project" instead of "VMWare,
Inc." and the software rasterizer renderer string is now "Software
Rasterizer". This update cogl-gpu-info.c to recognize these new strings.
Thanks to Alexander Larsson for the original patch.
https://bugzilla.gnome.org/show_bug.cgi?id=683818
(cherry picked from commit dfacbbd96f3fbadaffa4a76dfd71c47ece6ed6a3)
As part of our on-going goal to remove our dependence on a global Cogl
context this patch adds a pointer to the context to each CoglTexture
so that the various texture apis no longer need to use
_COGL_GET_CONTEXT.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 83131072eea395f18ab0525ea2446f443a6033b1)
We want applications to fully control the lifetime of a CoglContext
without having to worry that internal resources (such as the default
2d,3d and rectangle textures, or any caches we maintain) could result in
circular references that keep the context alive. We also want to avoid
making CoglContext into a special kind of object that isn't ref-counted
or that can't be used with object apis such as
cogl_object_set_user_data. Being able to reliably destroy the context is
important on platforms such as Android where you may be required
bring-up and tear-down a CoglContext numerous times throughout the
applications lifetime. A dissadvantage of this policy is that it is now
possible to leave other object such as framebuffers in an inconsistent
state if the context is unreferenced and destroyed. The documentation
states that all objects that directly or indirectly depend on a context
that has been destroyed will be left in an inconsistent state and must
not be accessed thereafter. Applications (such as Android applications)
that need to cleanly destroy and re-create Cogl resources should make
sure to manually unref these dependant objects before destroying the
context.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 23ce51beba1bb739a224e47614a59327dfbb65af)
cogl_context_new() had a mixture of references to the file scope context
variable (_context) and the local (context) variable. This renames the
file scope variable to _cogl_context to catch unnecessary references to
the old name and fixes the code accordingly to reference the local
variable instead.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 33a9397ee1ae1729200be2e5084cf43cebb64289)
There were lots of places where cogl_texture_2d_new_from_foreign would
simply return NULL without returning a corresponding error. We now
return an error wherever we are returning NULL except in cases where the
user provided invalid data.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit a1efc9405a13ac8aaf692c5f631a3b8f95d2f259)
There are two extensions, GL_OES_packed_depth_stencil and
GL_EXT_packed_depth_stencil, that inform us that the hardware supports
packing the depth and stencil values together into one format.
The OES extension is the GLES equivalent of the EXT extension and the
two extensions provide the same enums with basically the same semantics,
except that the EXT extension is a lot more wordy due to a larger number
of features in the full OpenGL api and the OES extension has some
asymmetric limitations on when the GL_DEPTH_STENCIL and
GL_DEPTH24_STENCIL8 enums can be used as internal formats.
GL_OES_packed_depth_stencil doesn't allow the GL_DEPTH_STENCIL enum
to be passed to glRenderbufferStorage (GL_DEPTH24_STENCIL8 should be
used instead) and GL_OES_packed_depth_stencil doesn't allow
GL_DEPTH24_STENCIL8 to be passed as an internal format to glTexImage2D.
We had been handling the two extensions differently in Cogl by calling
try_creating_fbo with different flags depending on whether the OES or
EXT extension was available and passing GL_DEPTH_STENCIL to
glRenderbufferStorage when we have the EXT extension or
GL_DEPTH24_STENCIL8 with the OES extension.
To localize the code that deals with the differences between the
extensions this patch does away with the need for separate flags
so we now just have COGL_OFFSCREEN_ALLOCATE_FLAG_DEPTH_DEPTH_STENCIL and
right before calling glRenderbufferStorage we check which extension we
are using to decide whether to use the GL_DEPTH_STENCIL or
GL_DEPTH24_STENCIL8 enums.
(cherry picked from commit 88a05fac6609f88c0f46d9df2611d9fbaf159939)
textures[iter_y.index * n_y_spans + iter_x.index]
only works for vertical rectangles when n_x_spans > 0 (ie x != {0} )
is also wrong for horizontal rectangles ( x = {0, 1, 2, 3} , y = {0, 1}
-> second line will start at 2 = iter_y.index * n_y_spans + iter_x.index
-> iteration are 0, 1, 2, 3, \n 2, 3, 4, 5 instead of 0, 1, 2, 3 \n 4, 5, 6, 7
Reviewed-by: Robert Bragg <robert@linux.inte.com>
(cherry picked from commit bf0d187f1b5423b9ce1281aab1333fa2dfb9863f)
When pruning a pipeline to a set number of layers it records the index
of the first layer after the given number of layers have been found.
This is stored in a variable called 'first_index_to_prune' implying
that this layer should be included in the layers to be pruned. However
the subsequent if-statement was only pruning layers with an index
greater than the recorded index so it would presumably only prune the
following layers. This patch fixes it to use '>=' instead.
https://bugzilla.gnome.org/show_bug.cgi?id=683414
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit d3063e8dea92a8f668acef6435cc68e0c901dc8d)
When pruning layers from a pipeline the pipeline cache would once be
freed due to the call to pre_change_notify but it would immediately be
recreated again when foreach_layer_internal is called. When n_layers
is later set to 0 it would end up with an invalid cache lying around.
This patch changes the order so that it will iterate the layers first
before triggering the pre-change notify so that the cache will be
cleared correctly.
https://bugzilla.gnome.org/show_bug.cgi?id=683414
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 1c8efdc838cc5ace380365cb54e0741645856edf)
The check for whether to use ‘stride’ instead of ‘pitch’ from the GBM
API tries to check whether the GBM version is >= 8.1.0. However it was
comparing the major and micro components independently so any version
with the minor part set to 0 would fail. The GBM version in Mesa
master is now 9.0.0 which breaks it. This patch changes it to check
the version using the COGL_VERSION_ENCODE macro instead.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 38f1dc58b35023f9e6bbc0db746b1554bd0377fc)
When building COGL with multiple backends it can be useful to force a
default driver to be selected. For example while for Debian we do want to
build the GL renderer on ARM, GLESv2 is much more suitable as the
default renderer on that platform.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 8a43aa7167b56784f7b50c557391b990861d594f)
As a helpful aid Cogl will now print a warning if no "Mainloop" UProf
timer was setup by the application that explains that either Clutter
should be built with --enable-profile or if Clutter isn't being used
then it shows how it can create its own Mainloop timer.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 3d052dbca86bf36f30b2d60ff59b967d14665436)
This adds a uprof timer around the _cogl_journal_discard() at the end of
_cogl_journal_flush() since this sometimes takes a significant
proportion of the time to flush the journal.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 14ffc3a197100be814452af2d0f839970353b04d)
Since we only want to disable the debug features that may impact
performance when building with --disable-debug this ensures that the
COGL_DEBUG_ macros aren't defined as NOPs for non-debug builds.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit c4b50040b5c033e370eb721d1d217eced8ebdaad)
_cogl_pipeline_get_layer_with_flags accepts a CoglPipelineGetLayerFlags
flags argument and understands one COGL_PIPELINE_GET_LAYER_NO_CREATE
flag. There was a mistake with the definition of this enum though so
COGL_PIPELINE_GET_LAYER_NO_CREATE had a value of 0 and so testing for
the flag using the bitwise & operator would never find the flag set.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 5923f92f1428b3eb4977b5f21723f1b19a9d284a)
If a primitive is already line based then we don't need to do anything
special to draw it in wireframe mode.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit fb575a42c308739a7185311a613b1a5f49dbfb39)
If a CoglPrimitive is associated with a set of indices then we must
unref those indices when freeing the primitive to avoid a leak.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 45cac786b55c953e44f98b864add952b9e398b13)
gbm_bo_get_pitch was renamed to gbm_bo_get_stride to be consistent with
how the terms pitch and stride are used throughout mesa. This updates
the Cogl backend to use the new gbm_bo_get_stride name.
For compatibility with previous version of libgbm we now explicitly
check the version of libgbm in configure.ac and expose
COGL_GBM_{MAJOR,MINOR,MICRO} defines to the code so we can conditionally
use the older gbm_bo_get_pitch() name with older versions.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 47c6247095e2f1f8725c4eb08d38c9de15e283cd)
The version number macros were using the @COGL_VERSION_*@
substitutions. These are always defined to 2.0.0 in the 1.x releases
so we need to use the Cogl @COGL_1_VERSION_*@ substitutions instead to
get the real version number.
When the GL_EXT_unpack_subimage extension is not available and a
subregion of a texture is uploaded then it should first copy the
subregion to a newly allocated bitmap. However it was then later still
trying to prepare the upload using the original src_x and src_y values
which would cause an assertion failure. This patch fixes it to just
reset those to zero if the subregion is first copied.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 6f9a62db6f846f1d76e3ca16d9d8cdadf82a7009)
Update the cogl.symbols file for the 1.12 series, where symbols
were added for the following commits:
010d16f6: Adds initial GLES2 integration support
6eb88648: Add a cogl_matrix_init_from_euler function
5e8ff248: Add functions to directly transform from a euler or a quaternion
1686e754: bitmap: Adds cogl_android_bitmap_new_from_asset()
df515741: onscreen: Adds support for resizable windows
e347135b: Move cogl_wayland_display_ proto to cogl-wayland-server.h
Plus, when we branched out for 1.12, some needed symbols were missing, so
we would need to make up for them, in particular those in cogl-shader.h
and cogl-path-functions.h.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Don't use --symbol-prefix cogl_gtype as we are still using the old
namespace in cogl-1.12, so there will still be the various _get_type()'s
like before
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The surfaceless extension that Mesa advertises has been renamed to
EGL_KHR_surfaceless_context instead of a separate extension for the
GLES, GLES2 and GL APIs and the new extension has been ratified by
Khronos. Therefore the KMS backend no longer runs against Mesa master.
We could just rename the extension we check for, however Weston (the
sample Wayland compositor) has switched to just creating a dummy GBM
surface and not using the surfaceless extension at all. We should
probably do the same thing.
Using the surfaceless extension could be a good idea but we don't
really need to rely on it for KMS and we would want to do it for all
EGL backends, not just the KMS backend.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit d4f22f8cb013d417c99ba03924538924191c2fe6)
cogl_framebuffer_set_{projection,modelview}_matrix don't need to read
from the matrix argument so they should probably take a const pointer.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 710d6af053aca97935b54f9ff68858ef51f4482b)
When loading images on Quartz, the image is rendered into a bitmap
context using a buffer allocated with
_cogl_bitmap_new_with_malloc_buffer. However this buffer is not
initialised and by default Quartz will blend the source image with the
destination so if there are transparent parts in the source image it
will leave garbage in the destination. This patch changes the blend
mode to 'copy' so that it won't try to blend.
Before 5b785dd4 the buffer was cleared because it was allocated with
g_malloc0 so it was working in that case. Presumably it should be more
efficient to disable blending and avoid the clear though.
https://bugzilla.gnome.org/show_bug.cgi?id=680124
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 5ba7f4e6837a539d92cbe45491f79a8926fd6828)
When the CoglGLES2Context is bound to read from a CoglOffscreen then
the result will be upside down from what GL expects if
glCopyTexImage2D is used directly. To fix that, this patch now wraps
glCopyTexImage2D and glCopyTexSubImage2D so that the copy is doing by
binding an FBO to the target texture and then rendering a quad
sampling from the texture in the offscreen framebuffer.
The rendering is done using the Cogl context rather than the GLES2
context because otherwise it would have to do a fair bit of work to
try and stash the old state on the context before setting up the state
to do the blit. The down side of this is that the contexts need to be
synchronized so that the rendering will be up-to-date. As far as I
understand from the GL spec, this requires a glFinish and then the
texture needs to be rebound in the new context because updates to
shared objects are guaranteed to be reflected until the object is
rebound.
GLES2 supports using glCopyTexImage2D for cube map textures. As Cogl
doesn't currently have support for cube maps, it is quite hard to get
that to work with this patch. For now attempts to copy to a cube map
texture will just be sliently ignored.
This patch also includes a test case which renders an image to the
framebuffer and then copies it to a texture. The texture is then
rendered back to the framebuffer and the contents are checked for the
correct orientation using glReadPixels.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 30b6da8134bad95267265e26685c7475f6c351c9)
This patch adds a hash table mapping texture object IDs to a struct so
that we can keep track of some of the state for each texture object.
Currently it will just track the width and height of the texture 2D
target.
Additionally it will now try to delete any texture objects that have
data created for them by the GLES2 context so that it won't leak them.
It only tracks objects that get data set on them, not all objects that
are bound because it is possible to use the GLES2 context with foreign
textures via cogl_gles2_texture_get_handle() and we don't want to
delete those.
In order to keep track of the currently bound texture object it also
needs to track the active texture unit.
Note that this state tracking will probably go wrong if GL throws an
error for invalid state. For example if glActiveTexture is called with
an invalid texture unit then GL will ignore the binding but Cogl will
assume it is valid and the state tracking will get out of sync.
Perhaps it would be good if Cogl could detect the errors but this is
difficult to do without consuming them.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit d8c72bb56cf3598fc57d629edc618f1bfa79f125)
Cogl has a different origin for texture coordinates than OpenGL so
that the results of rendering to a texture should leave the top of the
image at the texture coordinate 0,0 rather than the bottom. When a
GLES2 context is used to render to a Cogl texture via a CoglOffscreen
we don't really want the application to have to be aware of the
mismatch and flip the texture coordinates. To get that to work, this
patch now tracks all of the programs that the application generates
using the context and sneaks in an extra vertex shader with an
alternative main function. This main function multiplies the final
calculated gl_Position by a vector uniform which we can use to flip
the image. When the application uploads the source code for a vertex
shader we now replace any occurrences of the token 'main' with '_c31'
and this renamed function gets called from the replacement main
function. The token has a weird name so that it will be unlikely to
conflict with a variable name in the application's source but it also
needs to have the same number of characters as the original token so
that it won't affect column numbers in the error reporting.
We are also wrapping glGetShaderSource so that we can try to revert
the token name. The same goes for the error logs just in case the
error report mentions function names.
Both places that cause drawing to occur (glDrawElements and
glDrawArrays) are now also wrapped so that we can update the uniform
value whenever the program is used with a different type of
framebuffer from last time.
We additionally need to manually track the state for the viewport, the
stencil box and the front face because all of these will be affected
by whether we are flipping the image or not. Any attempts to change
these states will be queued and instead flushed at the last minute
before drawing.
There are still some known issues with this patch:
• glCopyTexImage2D and glCopyTexSubImage2D will do the wrong thing
when copying data from a CoglOffscreen. This could be quite fiddly
to solve.
• Point sprites won't flip correctly. To make this work we would need
to flip the gl_PointSprite builtin variable somehow. This is done in
the fragment shader not the vertex shader so flipping the calculated
gl_Position doesn't help here.
• The patch doesn't attempt to flip rendering to framebuffers for
textures created within the GLES2 context. This probably makes sense
because those textures are likely to be used within the GLES2
context in which case we want to leave the texture coordinates as
they are. However, if the texture is shared back out to Cogl with
cogl_gles2_texture_2d_new_from_handle then the texture will be
upside-down.
• The application can discover our secret uniform that we added via
glGetActiveUniform. It might be worth trying to disguise this by
wrapping that function although that could be quite fiddly.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit d589bf19e51f22c3241b2a18db10f22131ac126a)
memmem is a GNU libc extension that works like strstr except that the
size of the needle and the haystack are passed into the function
instead of using null-terminated strings.
This patch adds a wrapper function called 'cogl_util_memmem' so that
we can use this function. There is a configure check and if the
function is not available then a fallback implementation will be used.
Otherwise cogl_util_memmem is just defined to memmem.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 1dd1b0a67f6238e13f7f9253fb03addada0541b7)
All of the functions that create and destroy shaders are now wrapped
in the CoglGLES2Context so that we can track some extra data for them.
There are hash tables mapping object IDs to the corresponding data.
The data is currently not used for anything but will be in later
patches.
The glUseProgram, glAttachShader and glDetachShader functions
additionally need to be wrapped because GL does not delete shader
objects that are in use. Therefore we need to have a reference count
on the data so we can recognise when the last use has been removed.
The IDs are assumed to be specific to an individual CoglGLES2Context.
This is technically not the case because all of the CoglGLES2Contexts
are in the same share list. However we don't really want this to be
the case so currently we will assume sharing the object IDs between
contexts is undefined behaviour. Eventually we may want to actually
enforce this.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 05dc1e34785ae5f5484cd398ecc5464bd8bd3dcd)
In GL, the default viewport and scissor should be set to the size of
the first surface that the context is bound to. If a CoglGLES2Context
is first used with an offscreen framebuffer then this surface will
actually be the dummy 1x1 window which will mess up the defaults. To
fix that, this patch makes it just always override the viewport and
scissor the first time the context is bound to something.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 02567b3e6b64e6849b9f7c6aa2137401be7ece8d)
Since 0773107deb9ede the prototype for
cogl_wayland_display_set_compositor_display() has moved into
cogl-wayland-server.h but cogl-display.c wasn't updated to include this
header.
(cherry picked from commit f6ccff9992fcfb9497ce91dd299460362476ba7a)
We need to avoid including wayland-server.h or wayland-client.h
indirectly when including cogl.h because there are overlapping typedef
names between the client and server wayland headers and we can't assume
whether Cogl is being used client or server side. This moves the
prototype for cogl_wayland_display_set_compositor_display() into
cogl-wayland-server.h which Cogl apps must include explicitly if the
want access to server side Cogl Wayland symbols.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 0773107deb9eded408e2801f217462c5d551f15a)
The header guard for cogl-texture-2d-private.h was
__COGL_TEXTURE_2D_H. This would conflict with the header guard for
cogl-texture-2d.h except there a small typo ('TEXURE') so that it
was subtly different. This fixes them both to make more sense.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 222ec4d009973cb62020a9da05f72dea41460b33)
This function should take an extra third paramter to specify whether
the procedure is in core or not. The parameter is not used so this
patch just fixes an annoying warning.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit eed4ac80cd8c3fa1859493c9bb00547038be6095)
This just gets rid of some annoying warnings.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 3d0aea04d1f6a8094b749e20a59d8a9a95a6235e)
The cogl-texture-2d-private.h header checks for the presence of
EGL_KHR_image_base before declaring
_cogl_egl_texture_2d_new_from_image. This define will only be
available if the EGL headers are included so we should make sure that
happens. This was resulting in a warning complaining that the function
was not previously declared.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit bd4840d7858efcf30eb5cf5d6fd0d39bdd59d1c1)
This adds two new configuration environment variables:
COGL_DISABLE_GL_EXTENSIONS and
COGL_OVERRIDE_GL_VERSION
The variables can also be set in the cogl.conf file using the same
names.
The first one is a list of GL extension names separated by commas.
When set Cogl will assume any extension listed here is not available
by removing it from the string returned from
glGetString(GL_EXTENSIONS). If the string is set in both the config
file and the environment variable then the union of the two lists will
be used.
The second overrides the value returned from glGetString(GL_VERSION).
If the string is set in both places the version from the environment
variable will take priority.
These are sometimes useful for debugging Cogl to test the various
combinations of extensions. It could also be useful to work around
driver bugs where an extension is badly supported and it would be
better not to use it.
The variables in cogl-config that just set a global char * variable
have been put together in an array instead of having a separate blob
of code for each one in order to make it simpler to add new variables.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit ec69c2dc576c78664e0b73879365cb7414ecf441)
Someone trying to compile cogl (ThijsNL on irc0 for the Rasberry Pi
stumbled into that one. GLXDrawable may not be defined in a pure EGL/X
environment.
Change it to Window, the type used for XConfigureEvent.window.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit f05d6923fff28b1d167a391d486e319743c49215)
This doesn't appear to be used anywhere in the code since it was added
in 1cc3ae69. Dead code is confusing so let's remove it.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 41928d0ac528acf4ba89b5b27d7ca7ac5501b194)
Otherwise, X11 identifiers may leak and cause havoc in big applications
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit ed0cdca0eca815543619fe72fbd42d662d53f92d)
When multiplying two quaternions, we now implicitly copy the components
of the 'a' argument so that the result can be reliably written back to
the 'a' argument quaternion without conflicting with the multiplication
itself. This is consistent with the cogl_matrix_multiply() api which
allows the 'result' and 'a' arguments to point to the same matrix. In
debug builds Cogl will assert that the 'b' and 'result' arguments don't
point to the same quaternion.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 207527313a8957789390069e84189254cf41e88f)
When freeing a CoglOnscreen we weren't freeing the state associated with
swap notification callbacks.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 70bc12fe20fa1be4eac58356861a730f18d6b59e)
This fixes _cogl_memory_stack_free to ensure we don't dereference freed
memory as we iterate the sub-stacks to free them.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 1d27fedef9c599aa9976b809f18e0da1913cec26)
This adds api to be able to request that the window system allows a
given onscreen framebuffer to be resizable, and api to add and remove
resize handlers to be called whenever the framebuffer does actually
change size.
The new functions are:
cogl_onscreen_{get,set}_resizable()
cogl_onscreen_{add,remove}_resize_handler()
The examples cogl-hello and cogl-x11-foreign have been updated to use
the new api. To smoke test how Cogl updates the viewport automatically
in response to window resizes the cogl-hello test doesn't explicitly
respond to resize events by setting the viewport and cogl-x11-foreign
responds by setting a viewport that is offset by a quarter of the
window's width/height and half the width and height of the window.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit a1a8cc00bfa2cecaf1007aec5f3dd95dc07b1786)
When using the GLES2 driver with a pipeline layer that has point
sprite coordinates enabled it extracts the texture coordinates from
the gl_PointCoord builtin instead of cogl_tex_coord_in[*].
gl_PointCoord is not quite the same as the regular texture coordinates
because it is only a vec2 instead of a vec4. This used to work ok
because either set of texture coordinates would always immediately be
accessed using a swizzle of '.st' so it would effectively be converted
to a vec2 anyway. However since the snippet hook for texture lookups
was added the texture coordinates are now passed to a function to
perform the actual lookup instead. This function always takes a vec4
so the shader would not compile. This patch fixes it to construct a
vec4 from gl_PointCoord by setting the third and fourth components to
0.0 and 1.0.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit cb3409b23caf324a548f82cfb88acc684cc71930)
Otherwise, if a texture is created before all the other FBOs, a new
atlas will be created, with a FBO with COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL
causing last_offscreen_allocate_flags to be 0.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 7d2156785da8196e129eb393efb0d09093c4783e)
This adds some android specific api for creating a CoglBitmap from an
Android asset.
As part of the work it also seemed like a good time to change the
internal bitmap constructors to take an explicit CoglContext argument
and so the public cogl_bitmap_new_from_file() api was also changed
accordingly to take a CoglContext pointer as the first argument.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 099d6d1b505b55bbd09c50d081deb41ab5764e19)
Since we aren't able to break APIs on the 1.12 branch this cherry-pick
skips the change to cogl_bitmap_new_from_file()
