Release Cogl 1.17.2 (snapshot)

Good news, everyone!

A new Cogl snapshot (1.17.2) is now available:


Cogl 1.17.2                                                        2014-01-20

  • List of changes since Cogl 1.16.0

  » Textures are now allocated lazily. This means the textures can
    optionally be configured with extra API before data is uploaded to
  » The internal format for textures has been replaced with a simpler
    property to just set the number of components that will be
    required when sampling.
  » Depth writing can now be disabled per-framebuffer as well as on
    the CoglPipeline.
  » The interface typedefs such as CoglTexture, CoglFramebuffer and
    CoglBitmap etc are now defined as void so that it is no longer
    necessary to use type-cast macros when passing them to interface
  » YV12/I420 support in cogl-gst is fixed.
  » Added support for red-green 2-component textures.
  » The cache of GLSL shaders is now garbage collected when it gets
    too large.
  » cogl_framebuffer_push_path_clip is fixed.
  » cogl-path is now split out into a separate library.
  » New function cogl_wayland_texture_set_region_from_shm_buffer to
    update a texture from a Wayland SHM bufffer.
  » The pkg-config files for cogl-gst and cogl-gles2 have new more
    consistent names.

  • Gnome Bugzilla bugs closed since 1.16.0:

    #706808 - "Unable to locate required kms libraries" message is really
    #709827 - Add API to control per-FB depth writing
    #710135 - Fix build on big endian
    #710926 - Build fails without declaration of wl_resource
    #712562 - Fixes for the journal
    #712830 - Add COGL_PIXEL_FORMAT_U_V
    #719546 - cogl-framebuffer: Fix a potential NULL pointer dereference
    #719582 - cogl-framebuffer: Don't mark the clear clip dirty from the
    #720287 - cogl-path: Export cogl_clip_push_from_path
    #721450 - Re-enable swap_region for mesa 10.1+ llvmpipe / swrast

Many thanks to:

  Robert Bragg
  Jasper St. Pierre
  Adel Gadllah
  Lionel Landwerlin
  Chun-wei Fan
  Colin Walters
  Emilio Pozuelo Monfort
  Hans Petter Jansson


Tarballs can be downloaded from:

SHA256 Checksum:


Additionally, a git clone of the source tree:
  git clone git://

will include a signed 1.17.2 tag which points to a commit named:

which can be verified with:
  git verify-tag 1.17.2

and can be checked out with a command such as:
  git checkout -b build 1.17.2


Cogl is a small open source library for using 3D graphics hardware for
rendering. The API departs from the flat state machine style of OpenGL and is
designed to make it easy to write orthogonal components that can render without
stepping on each others toes.

As well as aiming for a nice API, we think having a single library as opposed
to an API specification like OpenGL has a few advantages too; like being
able to paper over the inconsistencies/bugs of different OpenGL
implementations in a centralized place, not to mention the myriad of OpenGL
extensions. It also means we are in a better position to provide utility
APIs that help software developers since they only need to be implemented
once and there is no risk of inconsistency between implementations.

Having other backends, besides OpenGL, such as drm, Gallium or D3D are
options we are interested in for the future.


Cogl currently only requires:

  • OpenGL ≥ 1.3 (or 1.2 + multitexturing), or OpenGL ES 2.0 (or 1.1)
  • GLX, AGL, WGL or an EGL implementation

Cogl also has optional dependencies:

  • GLib ≥ 2.32.0
     - for gtype integration
  • GDK-Pixbuf ≥ 2.0
     - for image loading
  • Cairo ≥ 1.10
     - for debugging texture atlasing (debug builds only)

The optional Cogl Pango library requires:
  • Cairo ≥ 1.10
  • PangoCairo ≥ 1.20

The optional Cogl GStreamer library requires:

  • GStreamer 1.0

On X11, Cogl depends on the following extensions

  • XComposite ≥ 0.4
  • XDamage
  • XExt
  • XFixes ≥ 3

For the Wayland backend, Cogl requires:
  • Wayland ≥ 1.0.0

When running with OpenGL, Cogl requires at least version 1.3
or 1.2 with the multitexturing extension. However to build Cogl
you will need the latest GL headers which can be obtained from:

If you are building the API reference you will also need:

  • GTK-Doc ≥ 1.13

If you are building the additional documentation you will also need:

  • xsltproc
  • jw (optional, for generating PDFs)

If you are building the Introspection data you will also need:

  • GObject-Introspection ≥ 0.9.5

GObject-Introspection is available from:


If you want support for profiling Cogl you will also need:

  • UProf ≥ 0.3

UProf is available from:



The 1.x stable API is documented here:
The 1.x development API is documented here:
The experimental 2.0 API is documented here:

  - This is a development snapshot release so there are not API or ABI stability
    guarantees at this point for new APIs since the last stable release.

  - This Cogl release exports a 1.x API (For third-party Clutter
    developers to write custom actors) and an experimental 2.0 API which
    allows standalone application development.

  - Internally Clutter depends on the Cogl 2.0 experimental API so we maintain
    runtime compatibility between the 1.x API and experimental 2.0 APIs, which
    means developers can mix-and-match their use of the APIs in the same
    process.  API selection is done per-file by including a line like: '#define
    COGL_ENABLE_EXPERIMENTAL_2_0_API' before including cogl.h or clutter.h.

  - We recommend using the 2.0 API if you don't mind updating your code once in
    a while as this API evolves and stabilizes. We promise not to break the 2.0
    API during a 1.x stable cycle and hope that will encourage people to
    experiment with it and give critical feedback! For example after releasing
    1.8, the 2.0 API will be stable for 1.8.1, 1.8.2, 1.8.3 etc, but may update
    for 1.9/1.10.

  - Because we export the 1.x and 2.0 APIs from one the library
    versioning, and thus ABI, can only be considered as stable as our 2.0 API - 
    i.e. during a stable release 1.x cycle.

  - Please report bugs using the Cogl Bugzilla product, at:

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