Commit Graph

2874 Commits

Author SHA1 Message Date
Robert Bragg
afbb13e1a4 Add compiler deprecation warnings
This adds compiler symbol deprecation declarations for old Cogl APIs so
that users can easily see via compiler warning when they are using these
symbols, and also see a hint for what the apis should be replaced with.

So that users of Cogl can manage when to show these warnings this
introduces a scheme borrowed from glib whereby you can declare what
version of the Cogl api you are using:

COGL_VERSION_MIN_REQUIRED can be defined to indicate the oldest Cogl api
that the application wants to use. Cogl will only warn about
deprecations for symbols that were deprecated earlier than this required
version. If this is left undefined then by default Cogl will warn about
all deprecations.

COGL_VERSION_MAX_ALLOWED can be defined to indicate the newest api
that the application uses. If the application uses symbols newer than
this then Cogl will give a warning about that.

This patch removes the need to maintain the COGL_DISABLE_DEPRECATED
guards around deprecated symbols.

This patch fixes a few uses of deprecated symbols in the examples/

Reviewed-by: Neil Roberts <neil@linux.intel.com>
2013-04-24 22:23:50 +01:00
Andreas Oberritter
b5e57c914b wayland: implement poll_get_info and poll_dispatch
Call wl_display_dispatch on POLLIN. This follows the implementation
in weston/clients/window.c and improves integration of input events,
at least.

Signed-off-by: Andreas Oberritter <obi@saftware.de>
Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 323fe1887487f19c3e26aa6b7644de31d8d0a532)
2013-04-24 22:23:49 +01:00
Robert Bragg
8d6d1a4daa Bump version to 1.15.1 2013-04-24 22:23:49 +01:00
Neil Roberts
abaca02235 Add $(LIBM) to the LDADD for all of the examples and tests
Some of the examples and tests are using functions from -lm. With some
linkers, if we don't expicitly link against it an error will be
reported. This patch adds the library to all of the examples even
though not all of them use math functions because I don't think it
will do any harm and it will save us having to remember to add it if
an example later starts using some math functions.

https://bugzilla.gnome.org/show_bug.cgi?id=697330

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 66a1aeaee1f7cdcdd505f5745277723a43d714b6)

Conflicts:
	examples/Makefile.am
	tests/conform/Makefile.am
	tests/micro-perf/Makefile.am
2013-04-23 18:32:47 +01:00
Neil Roberts
95fe636a53 Fix a warning about ‘sincos’ in examples/cogl-gles2-gears
‘sincos’ is a GNU extension. cogl-gles2-gears was using it without
defining _GNU_SOURCE so it was generating some annoying warnings. This
patch fixes it by making the example include config.h which will end
up defining _GNU_SOURCE.

In addition this patch adds a configure check for the function and
provides a fallback if it's not available.

https://bugzilla.gnome.org/show_bug.cgi?id=697330

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit eb5c92952e1882c95cfd6debc69a2c9efff096b9)
2013-04-23 18:30:54 +01:00
Emanuele Aina
2ce952af59 gitignore: Ignore the examples/cogl-gles2-gears executable
https://bugzilla.gnome.org/show_bug.cgi?id=697330

Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit e3cc008e7a26af462871448561e4cde0f95bfdf9)
2013-04-23 18:30:54 +01:00
Emanuele Aina
b8673fbb2f build: Use LT_LIB_M to find the math library in a portable way
https://bugzilla.gnome.org/show_bug.cgi?id=697330

Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit a7b4930e14add7d955c22f396178b71083dfb52f)

Conflicts:
	cogl/Makefile.am
2013-04-23 18:30:50 +01:00
Neil Roberts
08b0d2d63e examples: Fix the first colour in the triangle_vertices
The first vertex in the triangle vertices used in the cogl-hello
example (which were copied into a few other examples) for some reason
has a semi-transparent alpha component. However the colour needs to be
pre-multiplied and the red component was still 0xff so the colour is
effectively invalid and the transparency isn't shown. This patch just
sets the alpha component to 0xff to make it less confusing.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 461879986ec012556b4e680b73e36d440927faaa)
2013-04-22 13:01:45 +01:00
Neil Roberts
856e9aa5f4 cogland: Try forcing an EGL context
Cogland works a lot better with an EGL context because then Mesa will
automatically set up the wl_drm object and it can accept DRM buffers.
However Cogland is still useful with GLX because it can gracefully
fallback to accepting only SHM buffers. This patch therefore makes it
first try creating and connecting a renderer with the EGL constraint,
but if that doesn't work it will try again without it.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 05ddc7d75e77538b5de22d4336d4a444d122063b)
2013-04-22 13:00:25 +01:00
Neil Roberts
20d64cbb39 cogland: Handle damage events for non-shm buffers too
When a Wayland compositor gets a commit it only needs to redraw the
region specified by the pending damage event. Previously Cogland was
ignoring damage events for non-shm buffers and just always queuing a
redraw after a commit event. This patch changes it to queue a redraw
only in response to a damage event. In practice this doesn't really
make much difference because Cogland doesn't do anything clever to
handle updating a sub-region of the screen, but it more costly matches
the model a compositor should use.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 15f00609e41f689234ee8d5b2f9e95fb74612d12)
2013-04-22 13:00:25 +01:00
Neil Roberts
efa3bd03c5 cogland: Don't leak the shell surface struct if requested twice
If the shell surface is requested twice then Cogland will hit an error
path but it would end up leaking the CoglandShellSurface struct it
allocated.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 622d41b04c2689a8e4fb6e1769aaf887a04242e8)
2013-04-22 13:00:25 +01:00
Neil Roberts
2f3591ace0 cogland: Fix handling the destroy listener for the pending buffer
The handler for the destroy signal on the pending buffer was not
correctly being removed if the same buffer is committed twice to the
surface. It was also not being cleared if the surface is destroyed
before the pending buffer is committed.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 11683476a7a62cd14a10d84fd52f2cb4b47e33a0)
2013-04-22 13:00:25 +01:00
Andreas Oberritter
a2168cedb3 cogl-xlib.h: add missing COGL_END_DECLS
Fixes compilation with C++ compiler.

Signed-off-by: Andreas Oberritter <obi@saftware.de>
Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 7b3c6dd7f6810f3c8dec62904daa887c917ab7e2)
2013-04-16 19:50:09 +01:00
Neil Roberts
20657d6245 pipeline-cache: Use a special trimmed down pipeline for the key
When a pipeline is added to the cache, a normal copy would previously be
made to use as the key in the hash table. This copy keeps a reference
to the real pipeline which means all of the resources it contains are
retained forever, even if they aren't necessary to generate the hash.

This patch changes it to create a trimmed down copy that only has the
state necessary to generate the hash. A new function called
_cogl_pipeline_deep_copy is added which makes a new pipeline that is
directly a child of the root pipeline. It then copies over the
pertinent state from the original pipeline. The pipeline state is
copied using the existing _cogl_pipeline_copy_differences function.
There was no equivalent function for the layer state so I have added
one.

That way the pipeline key doesn't have the texture data state and it
doesn't hold a reference to the original pipeline so it should be much
cheaper to keep around.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit e27e01c1215e7e7c7c0183ded11dd769bb112c5c)
2013-04-04 13:38:43 +01:00
Neil Roberts
4e03bd47bf pipeline-hash-table: Store the hash value in the entry
Calculating the hash value for a pipeline can be a bit expensive.
Previously when adding a new pipeline to the hash table we would end
up calculating the hash value once when checking whether the pipeline
is already in the hash table and then again when adding the pipeline
to the hash table. Ideally GHashTable would provide some API to add an
entry with a precalculated hash value to avoid the recalculation, but
seeing as it doesn't do that we can force it to avoid recalculating by
storing the hash value as part of the struct we are using for the key.
That way the hash func passed to GHashTable can simply return the
precalculated value and we can calculate the hash outside of the
GHashTable calls.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 4a0460a452fd1be382fd5a92d8cfd5e0cdfd4403)
2013-04-04 13:38:43 +01:00
Neil Roberts
3b8d328652 pipeline-cache: Use a shared hash table wrapper
The pipeline cache contains three separate hash tables, one for the
state affecting the vertex shaders, one for the fragment shaders and
one for the resulting combined program. Previously these hash tables
had a fair bit of duplicated code to calculate the hashes, check for
equality and copy the pipeline when it is added. This patch moves the
common bits of code to a new type called CoglPipelineHashTable which
just wraps a GHashTable with a given set of state flags to use for
hashing and checking for equality.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 402796430c839038339e531363b8c2463f9b2a9e)

Conflicts:
	cogl/Makefile.am
2013-04-04 13:38:41 +01:00
Neil Roberts
e98960a685 Conformance test to check whether the pipeline cache holds textures
Currently when a unique pipeline is created and added to the pipeline
cache that pipeline will live forever which includes keeping a
reference to any large resources that the pipeline has such as
textures. These textures don't actually need to be kept for the
pipeline to be used as a key in the hash table so ideally we wouldn't
do this. This test case tries rendering with a pipeline that has
textures and then checks whether the textures are successfully
destroyed after the pipeline is unreffed. The test is currently marked
as a known failure because the pipeline cache will prevent them from
being destroyed.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 0056f805dadd46b966d57f66b02890b8c29971ac)
2013-04-04 13:37:51 +01:00
Neil Roberts
3ba03feb7d quartz-image: Pass -framework ApplicationServices in the linker flags
The quartz image backend is using functions from the
ApplicationServices framework and I was getting linker errors if I
didn't use this option. I'm not sure how anyone managed to build it
before without this.

https://bugzilla.gnome.org/show_bug.cgi?id=696730

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 54d9139a929560d6703428371b38b83e7d965f45)
2013-04-04 13:37:51 +01:00
Neil Roberts
a1952a25ad quartz-image: Pass a CoglError argument to the bitmap functions
Since 67cad9c0 and f7735e141a the bitmap allocation and mapping
functions now take an extra error argument. The quartz image backend
was missed in this update so Cogl would fail to compile if
--enable-quartz-image is used.

https://bugzilla.gnome.org/show_bug.cgi?id=696730

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 1827965befccf331b0787f71cb191d370640a9de)
2013-04-04 13:37:51 +01:00
Inaki Larranaga Murgoitio
dabfbcce53 Updated Basque language 2013-04-03 23:11:07 +02:00
Neil Roberts
69c60f6bf9 Post-release version bump to 1.14.1 2013-03-25 14:07:32 +00:00
Neil Roberts
232d8dc67c Release 1.14.0 (release) 2013-03-25 13:31:19 +00:00
Neil Roberts
8defe8203a Updates NEWS for the 1.14.0 release 2013-03-25 13:26:05 +00:00
Robert Bragg
af8803baab egl: define missing EGL_KHR_create_context enums
This makes sure the EGL_KHR_create_context enums are always defined in
cogl-winsys-egl.c so we will build with drivers that don't support this
extension. Cogl will do runtime checks to explicitly check that the
extension is available before ever referencing these enums so this is
safe to do.

https://bugzilla.gnome.org/show_bug.cgi?id=694537

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit bd034b7451e7d9c602bcc91f1a00f6aaa7b05ec0)
2013-03-24 23:55:10 +00:00
Ján Kyselica
61f510ea6f Updated slovak translation 2013-03-24 12:12:14 +01:00
Neil Roberts
003886661c cogland: Flush the clients in prepare, not check
The clients should be flushed before going idle, not after so the call
to wl_display_flush_clients was in the wrong place.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit a191366fbababd5b551140ef9297a9c6e3852c59)
2013-03-22 15:51:58 +00:00
Neil Roberts
53a684bf9e cogland: Don't redraw constantly
Instead of always drawing at 60FPS without ever going idle, Cogland
now only redraws when a client commits a frame or a surface is
destroyed. This is acheived using an idle handler on the glib main
loop.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 906e1b5eb535a86a849bed7a363f800ad71ab9bc)

Conflicts:
	examples/cogland.c
2013-03-22 15:51:52 +00:00
Neil Roberts
666d0e100c cogland: Increase the display size to 800x600
The previous display size of 640x480 was a bit small to test with.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 835626e220137765df5acf7419036218e3fc7c97)
2013-03-22 00:13:37 +00:00
Neil Roberts
73b95dd451 cogland: Add an option to split the desktop into four outputs
Previously Cogland would always split the desktop into four outputs.
Although this is quite neat to demonstrate that it's possible, it's
quite annoying in practice while testing. This patch turns it into a
command line option which defaults to off.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 5570bf892268c8d2ea36bc26473aeb607c0e2c1d)
2013-03-22 00:13:36 +00:00
Neil Roberts
13675ab440 configure: Add a minimum required version for the wayland package
Previously Cogl would accept any version of Wayland when building the
Wayland backend. Seeing as there is now a stable API we might as well
specify that we require at least version 1.0.0. This is now also
mentioned in the README. This patch also changes it to use
PKG_CHECK_MODULES instead of PKG_CHECK_EXISTS because it does need to
abort if it fails and it shouldn't be checking it silently.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit d899955b714e5ed50c6c89b9fde4b341bcf80558)
2013-03-22 00:13:36 +00:00
Neil Roberts
5334547c00 cogland: Update to the Wayland 1.0 API
This updates Cogland example compositor to use the stable Wayland 1.0
API.

• When the client attaches a new buffer to a surface it is now added
  to a struct contaning pending the state instead of immediately
  switching to the new buffer. This state is then flushed when the
  surface is committed.

• The frame callbacks are now queued in a pending list and only added
  to the compositor's main list when the surface is committed. Both
  lists are now a wl_list instead of a GQueue because it makes it
  easier to remove the callback without knowing which list it is in.

• When the buffer is destroyed for a surface the resource for the
  buffer is now sent a release event.

• It now flushes the clients in the prepare for the for the Wayland
  event GSource. This is part of the multi-threaded API in this
  Wayland patch:

  http://cgit.freedesktop.org/wayland/wayland/commit/?id=53d24713a31d59

• Implements a dummy wl_region interface. The only interfaces that
  actually use regions (the opaque and input regions) are ignored but
  we need the interface to create a resource.

• Most the of the SHM interface is now implemented directly in
  libwayland-server except that it still needs to copy the data to the
  subregion of the texture when the damage region is committed.

• The callback list for when a resource is destroyed has been unified
  into a generic wl_signal implementation so the signature for the
  functions has been changed.

  http://cgit.freedesktop.org/wayland/wayland/commit/?h=6802eaa68af9022

• The wl_buffer struct no longer has a user_data parameter so we can't
  attach our own CoglandBuffer data to it. Instead the CoglandSurface
  now just keeps track of the wl_buffer directly.

• The Cogland example is now unconditionally built instead of checking
  the Wayland version number in the configure script. It looks like
  this check was broken anyway because it was checking the version of
  the gbm package rather than a Wayland package.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 4cbbc0f8e3de1fd44dee08b487f1c3f97dda8ede)

Conflicts:
	examples/Makefile.am
	examples/cogland.c
2013-03-22 00:13:32 +00:00
Plamena Manolova
b833d26b3f Fix multiple snippet interleaving bug
Interleaving multiple snippets with different hooks
(COGL_SNIPPET_HOOK_VERTEX and COGL_SNIPPET_HOOK_VERTEX_TRANSFORM,
for instance) used to cause a bug during shader code generation.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 38ca76695d54bbbfe3b940a6d0b2ae879e6fd66b)
2013-03-20 14:37:58 +00:00
Neil Roberts
22363a4137 Prune redundant pipeline ancestry after adding a layer difference
Adding a layer difference may mean the pipeline overrides all of the
layers of its parent which might make the parent redundant so we
should try to prune the hierarchy.

This is particularly important for CoglGst because whenever a new
frame is ready it tries to make a copy of the pipeline it last used
and then replace all of the textures in the layers. Without this patch
the new pipeline would keep the parent pipeline alive which means also
keeping the old textures alive so all of the frames of the video would
effectively be leaked.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 576c7b55aa835448c977f1d79d128dffd40e7cd8)
2013-03-19 17:53:43 +00:00
Neil Roberts
f9456574ef Add test to verify replacing a layer doesn't leak the pipeline parent
The current recommendation for pipelines is that once they have been
used for painting then they should be considered immutable. If you
want to modify a pipeline you should instead make a copy and unref the
original pipeline. Internally we try to check whether the modified
copy replaces all of the properties of the parent and prune a
redundant ancestor hierarchy. Pruning the hierarchy is particularly
important if the pipelines contain textures because otherwise the
textures may be leaked when the parent pipeline keeps a reference to
it.

This test verifies that usage pattern by creating a chain of pipeline
copies each with their own replacement texture. Some user data is then
set on the textures with a callback so that we can verify that once
the original pipelines are destroyed then the textures are also
destroyed.

The test is currently failing because Cogl doesn't correctly prune
ancestory for layer state authority.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 3fbec92acb90008492eb125025f92b42d6e07930)
2013-03-19 17:53:43 +00:00
Gheyret Kenji
a10b774f99 Updated Uyghur translation
Signed-off-by: Gheyret Kenji <gheyret@gmail.com>
2013-03-17 13:41:00 +09:00
Duarte Loreto
237478d426 Converted Portuguese translation to New Spelling (Novo AO) 2013-03-17 00:42:47 +00:00
Chun-wei Fan
92c1d7a491 Update config.h.win32.in
The config.h.in generated by autotools has much more entries than before,
so update the pre-configured config.h.win32.in.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
2013-03-15 00:26:35 +08:00
Chun-wei Fan
8906f7139a Update cogl.symbols
Add the newly-added symbols during the development cycle, and drop those
that are dropped.  Also, clean up the private symbols that were exported,
those that are still left in cogl.symbols are those still being referenced
by Cogl-Pango

Reviewed-by: Neil Roberts <neil@linux.intel.com>
2013-03-15 00:25:41 +08:00
Milo Casagrande
7c02a9eebf [l10n] Updated Italian translation. 2013-03-14 10:59:51 +01:00
Chun-wei Fan
72b25bd098 Update Visual Studio Project Files
-Make entries of the property sheets more like the property sheets of the
 projects in the GTK+/Clutter stack, mainly changing CoglApiVersion to
 ApiVersion, for better consistency, and update the corresponding projects
-Add command item in property sheets to build introspection files for Cogl
 and Cogl Pango.
-Stop building and installing the cogl-msaa example, as it is something
 that isn't really meant for Windows, and causes an internal compiler error
 on Visual Studio 2010 x64 builds
2013-03-07 11:37:32 +08:00
Pavol Klačanský
d77714b6a3 Updated Slovak translation 2013-03-06 17:39:50 +00:00
Robert Bragg
e886ad46e0 Revert "cogl-buffer: Stop warning spam running in sw rendering"
This reverts commit 83dbf79986981fac9ec0f2575b7c7cb32f629f0f.

On further consideration we realized that needing this change either
indicated a bug in the code using cogl, or that it was a symptom of
some other bug in Cogl resulting in us returning NULL in
cogl_buffer_map_range but not returning a CoglError too.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 8c5127c712570f1ea0d495a7fe7290ae5ee60ce6)
2013-03-06 16:46:03 +00:00
Robert Bragg
2fa7b5573d gl: ensure depth isn't masked during clear
If a pipeline has been flushed that disables depth writing and then we
try to clear the framebuffer with cogl_framebuffer_clear4f, passing
COGL_BUFFER_BIT_DEPTH then we need to make sure that depth writing is
re-enabled before issuing the glClear call. We also need to make sure
that when the next primitive is flushed that we re-check what state the
depth mask should be in.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 3cf497042897d1aa6918bc55b71a36ff67e560b9)
2013-03-06 16:45:31 +00:00
Robert Bragg
3c5ebb8752 framebuffer: vp change = clip change for gen6 workaround
This makes sure that a viewport change when comparing between separate
framebuffers also implies a clip change when we are applying the Intel
gen6 workaround for broken viewport clipping. Without this then
switching between different size framebuffers could leave a scissor
matching the size of a previous framebuffer.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit f23f2129c58550f819cff783f47039d7bd91391e)
2013-03-06 16:45:14 +00:00
Robert Bragg
b62b9a68bb bitmap: don't mark bitmap bound on _gl_bind error
This makes some changes to _cogl_bitmap_gl_bind to be more paranoid
about bad access arguments and make sure we don't mark a bitmap as bound
if there was an error in _cogl_buffer_gl_bind.

We now validate the access argument upfront to check that one of _READ
or _WRITE access has been requested. In the case that cogl is built
without debug support then we will still detect a bad access argument
later and now explicitly return before marking the bitmap as bound, just
in case the g_assert_not_reach has been somehow disabled. Finally we
defer setting bitmap->bound = TRUE until after we have check for any
error with _cogl_bitmap_gl_bind.

https://bugzilla.gnome.org/show_bug.cgi?id=686770

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 1720d5cf32449a189fd9d400cf5e6696cd50a9fa)
2013-03-06 16:44:52 +00:00
Jan Kyselica
bfea34b897 Added Slovak translation 2013-03-06 15:44:07 +00:00
Chun-wei Fan
f0f44793b1 Update Visual Studio property sheets
Some public headers were added, so these need to be "installed" as well.
Also clean up the preprocessor definitions as they were meant to be
in cogl/cogl-defines.h.
2013-03-01 16:00:44 +08:00
Chun-wei Fan
1ddf5e30c1 Fix Cogl Visual Studio Projects
Some GL driver sources were moved and added, so these sources and paths
must be added/changed in the Cogl projects
2013-03-01 15:58:46 +08:00
Neil Roberts
a131b697d9 Add the layer's sampler and uniform declarations at the start
Previously the sampler uniform declarations such as cogl_sampler0 were
generated by walking the list of layers in the shader state. This had
two problems. Firstly it would only generate the declarations for
layers that have been referenced. If a layer has a combine mode of
replace then the samplers from previous layers couldn't be used by
custom snippets. Secondly it meant that the samplers couldn't be
referenced by functions in the declarations sections because the
samplers are declared too late.

This patch fixes it to generate the layer declarations in the backend
start function using all of the layers on the pipeline instead. In
addition it adds the sampler declarations to the vertex shader as they
were previously missing.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 1824df902bbb9995cae6ffb7a413913f2df35eef)

Conflicts:
	cogl/driver/gl/cogl-pipeline-fragend-glsl.c
	cogl/driver/gl/cogl-pipeline-vertend-glsl.c
2013-02-27 15:53:43 +00:00
Neil Roberts
956d39ac30 Add fragment and vertex snippet hooks for global declarations
This adds hook points to add global function and variable declarations
to either the fragment or vertex shader. The declarations can then be
used by subsequent snippets. Only the ‘declarations’ string of the
snippet is used and the code is directly put in the global scope near
the top of the shader.

The reason this is necessary rather than just adding a normal snippet
with the declarations is that for the other hooks Cogl assumes that
the snippets are independent of each other. That means if a snippet
has a replace string then it will assume that it doesn't even need to
generate the code for earlier hooks which means the global
declarations would be lost.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit ebb82d5b0bc30487b7101dc66b769160b40f92ca)
2013-02-27 14:43:55 +00:00