This adds a new CoglDriver for GL 3 called COGL_DRIVER_GL3. When
requested, the GLX, EGL and SDL2 winsyss will set the necessary
attributes to request a forward-compatible core profile 3.1 context.
That means it will have no deprecated features.
To simplify the explosion of checks for specific combinations of
context->driver, many of these conditionals have now been replaced
with private feature flags that are checked instead. The GL and GLES
drivers now initialise these private feature flags depending on which
driver is used.
The fixed function backends now explicitly check whether the fixed
function private feature is available which means the GL3 driver will
fall back to always using the GLSL progend. Since Rob's latest patches
the GLSL progend no longer uses any fixed function API anyway so it
should just work.
The driver is currently lower priority than COGL_DRIVER_GL so it will
not be used unless it is specificly requested. We may want to change
this priority at some point because apparently Mesa can make some
memory savings if a core profile context is used.
In GL 3, getting the combined extensions string with glGetString is
deprecated so this patch changes it to use glGetStringi to build up an
array of extensions instead. _cogl_context_get_gl_extensions now
returns this array instead of trying to return a const string. The
caller is expected to free the array.
Some issues with this patch:
• GL 3 does not support GL_ALPHA format textures. We should probably
make this a feature flag or something. Cogl uses this to render text
which currently just throws a GL error and breaks so it's pretty
important to do something about this before considering the GL3
driver to be stable.
• GL 3 doesn't support client side vertex buffers. This probably
doesn't matter because CoglBuffer won't normally use malloc'd
buffers if VBOs are available, but it might but worth making
malloc'd buffers a private feature and forcing it not to use them.
• GL 3 doesn't support the default vertex array object. This patch
just makes it create and bind a single non-default vertex array
object which gets used just like the normal default object. Ideally
it would be good to use vertex array objects properly and attach
them to a CoglPrimitive to cache the state.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 66c9db993595b3a22e63f4c201ea468bc9b88cb6)
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.
But use cogl_test_verbose() instead.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 77efc7428d9ad18c2db1e3fdb544efa091249eaf)
test-journal needs cogl_glib_source_new() which is not available when
compiling cogl with --disable-glib.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 71fadbbfacad6a7c0ed7b06252d1e5e5dadf66f5)
So that we can show a UProf profile when running test-journal the test
now declares a static "Mainloop" timer which it starts/stops around the
GLib mainloop it runs.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 66b3d23c201b2e7dd74602e6e6e6c2d8ead47bcd)
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 adds an extra test to test-gles2-context which renders to an FBO
and then checks that the orientation is correct once the texture is
rendered via Cogl. This should test the code path to flip the GLES2
rendering in Cogl.
The rendering is done in three different ways to test the various
state that needs flipping:
• Just renders two triangle strips, one at the top and one at the
bottom.
• Renders two full screen triangle strips, but each with a different
viewport to clip it to the top or the bottom.
• Clears the screen with two different colors and a scissor to either
the top or the bottom.
• Renders both quads twice with two different colors and two different
front face states.
Additionally the rendering is verified by calling glReadPixels to
check that the returned pixels are flipped correctly.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 5b097f9bc4a3eb316c6bf0d9fe8db00ff93bfe73)
The test was passing NULL as the error argument but then trying to use
the error object if it failed so it would just crash in that case.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 61cbbb3000fb4001d51999fd05179c620b7e56bf)
There is currently a known bug where when rendering offscreen point
sprites will be rendered upside-down. For that reason
test-point-sprite is marked as a known failure because it checks the
orientation of the point sprites and the conformance test suite is
rendered to offscreen buffers by default. However this doesn't help to
catch more general failures that stop the point sprites being rendered
at all. To fix this the test-point-sprite test has been split into two
tests, one which verifies the orientation and one which does not. The
two tests are in the same source file and internally share the same
static function but pass a flag to specify whether to check the
orientation. If the orientation should be ignored then it will create
a 2x1 texture instead of a 2x2 texture so that it will appear the same
regardless of whether it is upside-down. The checks for the colors
have been altered accordingly.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 51b7fdbe17f300cf2edf42c2ca740ad748c9fd78)
If cogl_pipeline_remove_layer is called on a copied pipeline to remove
a parent layer then it will still end up calling
_cogl_pipeline_remove_layer_difference on the layer. This function
was directly trying to remove the layer from the pipeline's list of
layer differences. However in the child pipeline the layer isn't in
the list because it is unchanged from its parent. The function had an
assertion to verify that this situation wasn't hit so in a debug build
it would just bail out.
This patch removes the assertion and changes it to only remove the
layer if it is owned by the pipeline. Otherwise it just sets the
COGL_PIPELINE_STATE_LAYERS difference as normal and decrements the
number of layers. This will cause it to successfully remove the layer
because either it is the last layer in which case it will be ignored
after n_layers is decreased or if it is in the middle of the list then
the subsequent layers will all be shifted down so there will be a
replacement layer difference.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 88e73dd93fa09a158064a946ab229591a5888b97)
The test creates a pipeline with two layers which add two different
color constants together and then tries various combinations of
removing the layers and checks that it gets the right color.
Currently this is failing if a pipeline is copied and then a layer is
removed from the copy.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 844440a5cee5907c4d61e995804534ac0613bb0f)
This adds some preliminary testing for eulers and quaternions. It
mostly just tests the cogl_matrix_init_from_{quaternion,euler}
functions as well as applying a euler or quaternion transformation to
a framebuffer's modelview matrix.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit a32eb76e16d7d76af2fe8a6ba9151d8826b58864)
test-gles2-context was giving a warning because printf was being used
without including stdio.h. This changes it to use g_print and to first
check for g_test_verbose().
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 9f4945e3daa693e1aa56fe4c1ce37fcc545f8558)
This adds a new renderer constraint enum:
COGL_RENDERER_CONSTRAINT_SUPPORTS_GLES2_CONTEXT
that can be used by applications to ensure the renderer they connect to
has support for creating a GLES2 context via cogl_gles2_context_new().
The cogl-gles2-context and cogl-gles2-gears examples and the conformance
tests have been updated to use this constraint.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit ed61463d7194354b26624e8014859f0fbfc06a12)
This adds a conformance test that creates a GLES2 context via the cogl
api and verifies clearing an offscreen framebuffer via the gles2 api,
and switching back and forth between the Cogl and GLES2 apis.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 9369c60a596c0cbc7a8bb9a45d7b8ffb6a848311)
This adds a library that can be used instead of libGLESv2.so to provide
symbols for the GLES 2.0 api. This can be used for convenience when
using the cogl_gles2_context_ api since you don't need to manually go
through a CoglGLES2Vtable when calling the gles2 api so it should be
easier to port existing gles2 code to integrate with Cogl.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 80d7599a2acefca7d01d8d7de9df524278ef72c5)
This updates test-atlas-migration from being a Clutter-based test to a
Cogl-based test.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 32c5a3ed546effd2e2946f22f173a20cf36b2fdf)
cogl-handle.h was being listed in the sources but it has been removed
so the dist would not work.
Also the micro-perf directory under tests was not listed in
DIST_SUBDIRS so it would be skipped.
This patch was written by Rico Tzschichholz.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit fb96716aaffd72a00461ce4dd8496904de0bb1ff)
This adds a version header which contains macros to define which
version of Cogl the application is being compiled against. This helps
applications that want to support multiple incompatible versions of
Cogl at compile time.
The macros are called COGL_VERSION_{MAJOR,MINOR,MICRO}. This does not
match Clutter which names them CLUTTER_{MAJOR,MINOR,MICRO}_VERSION but
I think the former is nicer and it at least matches Cairo and Pango.
The values of the macro are defined to COGL_VERSION_*_INTERNAL which
is generated by the configure script into cogl-defines.h.
There is also a macro for the entire version as a string called
COGL_VERSION_STRING.
The internal utility macros for encoding a 3 part version number into
a single integer have been moved into the new header so they can be
used publicly as a convenient way to check if the version is within a
particular range. There is also a COGL_VERSION_CHECK macro for the
very common case that a feature will be used since a particular
version of Cogl. There is a macro called COGL_VERSION which contains
the pre-encoded version of Cogl being compiled against for
convenience.
Unlike in Clutter this patch does not add any runtime version
identification mechanism.
A test case is also added which just contains static asserts to sanity
check the macros.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 3480cf140dc355fa87ab3fbcf0aeeb0124798a8f)
This makes the test-cogl-perf test from clutter into a standalone Cogl
benchmark.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 1684a040b238ebae140e827f4003f2d2867c04f3)
The existing functions for stroking and filling a path depend on the
global framebuffer and source stacks. These are now replaced with
cogl_framebuffer_{stroke,fill}_path which get explicitly passed the
framebuffer and pipeline.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 713a8f8160bc5884b091c69eb7a84b069e0950e6)
The coding style has for a long time said to avoid using redundant glib
data types such as gint or gchar etc because we feel that they make the
code look unnecessarily foreign to developers coming from outside of the
Gnome developer community.
Note: When we tried to find the historical rationale for the types we
just found that they were apparently only added for consistent syntax
highlighting which didn't seem that compelling.
Up until now we have been continuing to use some of the platform
specific type such as gint{8,16,32,64} and gsize but this patch switches
us over to using the standard c99 equivalents instead so we can further
ensure that our code looks familiar to the widest range of C developers
who might potentially contribute to Cogl.
So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this
switches all Cogl code to instead use the int{8,16,32,64}_t and
uint{8,16,32,64}_t c99 types instead.
Instead of gsize we now use size_t
For now we are not going to use the c99 _Bool type and instead we have
introduced a new CoglBool type to use instead of gboolean.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
Removing CoglHandle has been an on going goal for quite a long time now
and finally this patch removes the last remaining uses of the CoglHandle
type and the cogl_handle_ apis.
Since the big remaining users of CoglHandle were the cogl_program_ and
cogl_shader_ apis which have replaced with the CoglSnippets api this
patch removes both of these apis.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0)
Since the original patch was done after removing deprecated API
this back ported patch doesn't affect deprecated API and so
actually this cherry-pick doesn't remove all remaining use of
CoglHandle as it did for the master branch of Cogl.
This adds a _COGL_STATIC_ASSERT macro that can be used for compile time
assertions in C code. If supported by the compiler this macro uses
_Static_assert so that a message can be printed out if the assertion
fails.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 465b39a764f2720e77678cafa56acb0e69007ffd)
This splits the GL header inclusion from cogl-defines.h into a
separate headear called cogl-gl-header.h which we will only include
internally. That way we don't leak GL declarations out of our public
headers. The texture functions that were using GLenum and GLuint in
the public header have now changed to just use unsigned int. Note
however that if an EGL winsys is enabled then it will still publicly
include an EGL header. This is a bit more awkward to fix because we
have public API which returns an EGLDisplay and we can't determine
what type that is.
There is also a conformance test which just verifies that no GL header
has been included while compiling. The test isn't added to
test-conform-main because it doesn't actually test anything at
runtime.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit ef5680d3fda5df929dbd0b420c8f598ded58dfee)
This adds experimental 2.0 api replacements for the cogl_rectangle[_*]
functions that don't depend on having a current pipeline set on the
context via cogl_{set,push}_source() or having a current framebuffer set
on the context via cogl_push_framebuffer(). The aim for 2.0 is to switch
away from having a statefull context that affects drawing to having
framebuffer drawing apis that are explicitly passed a framebuffer and
pipeline.
To test this change several of the conformance tests were updated to use
this api instead of cogl_rectangle and
cogl_rectangle_with_texture_coords. Since it's quite laborious going
through all of the conformance tests the opportunity was taken to make
other clean ups in the conformance tests to replace other uses of
1.x api with experimental 2.0 api so long as that didn't affect what was
being tested.
This adds a conformance test which renders a texture point using a 2x2
texture with a different color for each texel. It then verifies that
each texel is mapped to the correct position on the point. The test is
currently failing.
The test requires the point sprite feature flag so this patch also
adds a TEST_REQUIREMENT_* flag for that.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This tries rendering some points at various sizes and checks that they
are the expected size and make a rectangle shape. This is currently
failing when the GLSL vertend is used because it flushes the point
size in the wrong place.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This renames the TestRequirement enum to TestFlags and then adds a
TEST_KNOWN_FAILURE flag. The rename is because the new flag is not
really a requirement. If the flag is set then the test is assumed to
always fail.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This option to GCC makes it give a warning whenever a global function
is defined without a declaration. This should catch cases were we've
defined a function but forgot to put it in a header. In that case it
is either only used within one file so we should make it static or we
should declare it in a header.
The following changes where made to fix problems:
• Some functions were made static
• cogl-path.h (the one containing the 1.0 API) was split into two
files, one defining the functions and one defining the enums so that
cogl-path.c can include the enum and function declarations from the
2.0 API as well as the function declarations from the 1.0 API.
• cogl2-clip-state has been removed. This only had one experimental
function called cogl_clip_push_from_path but as this is unstable we
might as well remove it favour of the equivalent cogl_framebuffer_*
API.
• The GLX, SDL and WGL winsys's now have a private header to define
their get_vtable function instead of directly declaring in the C
file where it is called.
• All places that were calling COGL_OBJECT_DEFINE need to have the
cogl_is_whatever function declared so these have been added either
as a public function or in a private header.
• Some files that were not including the header containing their
function declarations have been fixed to do so.
• Any unused error quark functions have been removed. If we later want
them we should add them back one by one and add a declaration for
them in a header.
• _cogl_is_framebuffer has been renamed to cogl_is_framebuffer and
made a public function with a declaration in cogl-framebuffer.h
• Similarly for CoglOnscreen.
• cogl_vdraw_indexed_attributes is called
cogl_framebuffer_vdraw_indexed_attributes in the header. The
definition has been changed to match the header.
• cogl_index_buffer_allocate has been removed. This had no declaration
and I'm not sure what it's supposed to do.
• CoglJournal has been changed to use the internal CoglObject macro so
that it won't define an exported cogl_is_journal symbol.
• The _cogl_blah_pointer_from_handle functions have been removed.
CoglHandle isn't used much anymore anyway and in the few places
where it is used I think it's safe to just use the implicit cast
from void* to the right type.
• The test-utils.h header for the conformance tests explicitly
disables the -Wmissing-declaration option using a pragma because all
of the tests declare their main function without a header. Any
mistakes relating to missing declarations aren't really important
for the tests.
• cogl_quaternion_init_from_quaternion and init_from_matrix have been
given declarations in cogl-quaternion.h
Reviewed-by: Robert Bragg <robert@linux.intel.com>
test-cogl-sub-texture was fixed to now run on GLES2 since commit
5928cade0b so this removes the TEST_REQUIREMENT_GL flag for this test
so it doesn't get flagged as an unexpected pass.
This adds a test similar to the test-read-texture-formats test but
that updates data on a 1x1 pixel RGBA texture instead. On GLES2 this
should end up testing all of the convesion code because in that case
GL only supports reading back RGBA data.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The test-read-alpha-texture test has been replaced with a test that
tries reading an RGBA texture in all current pixel formats. On GLES2
this should end up testing all of the convesion code because in that
case GL only supports reading back RGBA data. The test now works on
GLES2 since the conversion code for all of the formats has been added
so this also removes the GL requirement.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This just creates a 1x1 RGBA texture and then reads it back in
COGL_PIXEL_FORMAT_A_8 format. Gnome Shell is doing this to create a
shadow and I accidentally broke it so this should hopefully stop that
happening again.
https://bugzilla.gnome.org/show_bug.cgi?id=671016
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This patch reworks our conformance testing framework because it seems
that glib's gtesting framework isn't really well suited to our use case.
For example we weren't able to test windows builds given the way we
were using it and also for each test we'd like to repeat the test
with several different environments so we can test important driver and
feature combinations.
This patch instead switches away to a simplified but custom approach for
running our unit tests. We hope that having a more bespoke setup will
enable us to easily extend it to focus on the details important to us.
Notable changes with this new approach are:
We can now run 'make test' for our mingw windows builds.
We've got rid of all the test-*report* make rules and we're just left
with 'make test'
'make test' now runs each test several times with different driver and
feature combinations checking the result for each run. 'make test' will
then output a concise table of all of the results.
The combinations tested are:
- OpenGL Fixed Function
- OpenGL ARBfp
- OpenGL GLSL
- OpenGL No NPOT texture support
- OpenGLES 2.0
- OpenGLES 2.0 No NPOT texture support
Reviewed-by: Neil Roberts <neil@linux.intel.com>
When requesting the texture data to test that we get back what we
uploaded, we need to ask for it in a premult format otherwise it will
get converted and the test will fail. This was working for the GL
driver because of a bug where it would fail to do the conversion.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
As we move towards Cogl 2.0 we are aiming to remove the need for a
default global CoglContext and so everything should be explicitly
related to a context somehow. CoglPipelines are top level objects and
so this patch adds a context argument to cogl_pipeline_new().
Reviewed-by: Neil Roberts <neil@linux.intel.com>
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the cogl-texture-3d
api symbols.
This patch also replaces use of CoglHandle with a CoglTexture3D type
instead.
Finally this patch also ensures the CoglTexture3D constructors take an
explicit CoglContext pointer but not a CoglTextureFlags argument,
consistent with other CoglTexture constructors.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This adds a utility function for inferring a CoglPixelFormat from a
set of channel masks, a bits-per-pixel value, a pixel-depth value and
pixel byte order.
This plan is to use this to improve how we map X visuals to Cogl pixel
formats.
This patch was based on some ideas from Damien Leone <dleone@nvidia.com>
https://bugzilla.gnome.org/show_bug.cgi?id=660188
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This adds a test for doing custom sampling using the cogl_sampler
variable in the texture lookup hook.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
There were lots of tests bundled into a single long function which was
becoming a bit unwieldy. It was also quite difficult to match up the
test's drawing with its color test. This patch just moves each little
sub test into its own function.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
