mutter/NEWS

Cogl 1.9.4                                                         2012-01-16

  • List of changes since Cogl 1.9.2

  » Visual Studio 2008/2010 project files have landed and are being actively
    maintained by Chun-wei Fan <fanchunwei@src.gnome.org>
  » A basic KMS (Kernel Mode Setting) backend was added so we can run fullscreen
    Cogl applications without X11 on Linux.
  » EGL platforms can now be selected at runtime. Although we've had the ability
    select backends at runtime for a while, up until now all EGL platforms were
    part of one monolithic backend and were mutually exclusive so a platform
    had to be chosen at build time.
  » cogl_matrix_orthographic() was added as a replacement for cogl_matrix_ortho()
    since the OpenGL style of arguments for cogl_matrix_ortho() wasn't consistent
    with the rest of the Cogl API.
  » Experimental cogl_framebuffer_ apis were added for manipulating the
    per-framebuffer modelview matrix stack. The aim is for these to replace
    apis like cogl_rotate/translate/scale because those apis aren't explicitly
    related to a CoglContext which we'd like to avoid so we can remove the
    need for a global CoglContext.
  » Experimental cogl_framebuffer apis were added for manipulating the
    per-framebuffer clip stacks.
  » The internal _cogl_framebuffer_flush_state() function was optimized to do
    a better job of bailing out when no framebuffer state has changed, and
    when state has changed the cost should now scale by the number of changes
    made instead of scaling by the total range of framebuffer state that Cogl
    tracks.
  » Internally we finally removed _cogl_enable() which won't mean much to most
    people but makes the maintainers happy. This happened as part of a rework
    for how attribute state is flushed when drawing which fixed some problems
    with supporting custom attributes and should improve the performance of
    flushing attributes too.
  » We added an experimental CoglSnippets api aiming to greatly simplify how
    developers can incorporate snippets of GLSL code into the pipeline. This is
    a feature that has been on the drawing board for a long time so we're
    really happy that it's finally here. 
    
    *** We'd really love to see people start to play with the snippets API and
    tell us how they get on. The plan is for this API to replace all need for
    developers to use the CoglProgram and CoglShader apis which are rather poor
    copies of the OpenGL APIs for using GLSL which don't map well to Cogl's
    design. ***

  » We've updated Cogl's client side Wayland support
  » We've updated Cogl's compositor side Wayland support, including updating the
    example cogland compositor.
  » We added an SDL window system backend for Cogl, which provides a simple,
    portable way to play with Cogl as a standalone graphics API with basic
    support for input events available from SDL. See examples/cogl-sdl-hello
    to see how that works.
  » We added mainloop integration support to Cogl. Since we want to have the
    ability to use poll() to block for events from some drivers we have introduced
    apis that all Cogl applications are required to use to integrate Cogl
    into their mainloop. For applications using a glib mainloop we've provided
    a GSource for convenience.

  • List of bugs fixed since Cogl 1.8.0

    https://bugzilla.gnome.org:

    #650020 - Visual C++ 2008/2010 Project files to compile Cogl and Cogl-Pango
    #665190 - The conformance test wrapper scripts don't return an exit code
    #665604 - Cogl needs to bind the framebuffer before calling eglSwapBuffers
    #665722 - Build Fixes for COGL master branch
    #665723 - Conformance tests failed (snippets, pipeline_uniforms)
    #667009 - Remove DRM vblank hack

Many thanks to:

  Neil Roberts
  Chun-wei Fan
  Rob Bradford
  Daniel Mustieles
  Fran Diéguez
  Aurimas Černius
  Javier Jardón
  Jorge González
  Joshua Lock
  Seong-ho, Cho
  Tomeu Vizoso
  Yinghua Wang

Cogl 1.9.2                                                         2011-11-23

  • List of changes since Cogl 1.8.0

  » Fix a crash while generating ARBfp code with layers containing a
    NULL texture.
  » Improvements to the mingw-fetch-dependencies script to work
    without first needing to find a copy of config.guess.
  » Translation updates.
  » Ported more conformance tests from Clutter to be standalone Cogl tests.
  » Adds experimental support for EXT_discard_framebuffer extension which
    is important for good performance on PowerVR graphics hardware
  » Adds experimental API to enable clipping to the silhouette of an arbitrary
    2D CoglPrimitive
  » Make the CoglTexture2DSliced API directly available as experimental API
  » Adds a new feature checking API that's not limited to just 32 features
    and also must be passed a CoglContext pointer so it's clear at what point
    the features can start to be queried.
  » Adds an experimental CoglMetaTexture interface that gives one simple
    api for mapping meta-textures that aren't directly understood by the GPU
    (such as sliced textures, atlas textures, sub textures) into low level
    textures. This interface also gives us a single place to handle repeat
    mode fallbacks, supporting clamp-to-edge, repeat and mirrored repeat.
  » Make the CoglTextureRectangle API directly available as experimental API
  » Adds experimental support for multisampling, which is where the gpu
    calculates multiple samples per pixel and the final pixel is a weighted
    average of those samples.  For example you can expect that multisampling
    with 4 samples per pixel would give similar quality to rendering at double
    the resolution and then scaling that image down with texture filtering, but
    the GPU can often do some tricks such that multisampling is faster than
    doing that manually (known as supersampling)
  » Make the CoglSubTexture API directly available as experimental API
  » Added an n_indices argument to cogl_primitive_set_indices to avoid needing
    to always call cogl_primitive_set_n_vertices() after using the api and
    to make it less error prone to use the api.
  » Ship a standalone cogl-xlib.h that must be included manually for any xlib
    specific api because the Xlib headers so many numerous badly namespaced
    symbols that it's not desireable to include them unless absolutely
    required.
  » Updated the Wayland support to work with the latest upstream interfaces.
  » Add experimental CoglPipeline API for controlling the backface culling.
  » Added a cogl_matrix_transpose() function
  » Add experimental support for setting uniforms on a CoglPipeline. This
    is in preparation for being able to associate snippets of GLSL that hook
    into specific parts of the pipeline. We plan to eventually deprecate
    CoglProgram but even in the meantime we would also recommend setting
    uniforms on the pipeline now instead of the program.
  » Adds experimental cogl_framebuffer_finish() api for explicitly synchonizing
    the GPU with the CPU.

  • List of bugs fixed since Cogl 1.8.0

    https://bugzilla.gnome.org:

    #656755 - Install the examples
    #658700 - Bind the locale domain so that gettext actually works
    #660184 - Running an X client causes a segfault when using software
              rendering
    #660387 - test-color-mask fails due to uninitialized texture data
    #660617 - Porting of clutter tests
    #660986 - memory leak in CoglPipeline::layers_cache
    #661019 - Indices don't seem to work
    #661174 - Remove inclusion of Xlib headers from Cogl headers
    #662184 - Pipeline shaders often fail to link on GLES2 because of different
              n_tex_coord_attribs
    #662542 - The ARBfp and GLSL pipeline backends sometimes don't flush
              uniforms
    #663578 - _COGL_RETURN_IF_FAIL sometimes doesn't use glib
    #663628 - Make the pipeline backface culling experimental public

Many thanks too:
    Robert Bragg
    Neil Roberts
    Luca Bruno
    Chun-wei Fan
    Jorge González
    Rob Bradford
    Fran Diéguez
    Rico Tzschichholz
    Yaron Shahrabani
    krishnababu k
    Damien Leone
    Daniel Martinez Cucalon
    Daniel Mustieles
    Flemming Christensen
    Gabor Kelemen
    Gil Forcada
    Ivaylo Valkov
    Jasper St. Pierre
    Kjartan Maraas
    Matej Urbančič
    Muhammet Kara
    Nguyễn Thái Ngọc Duy
    Nilamdyuti Goswami
    Seong-ho, Cho
    Simos Xenitellis
    Zan Dobersek

Cogl 1.8.0                                                         2011-09-19

  • List of changes since Cogl 1.7.8

  » Started porting Cogl conformance tests from Clutter to be standalone
    Cogl tests including tests for depth-state and backface culling.
  » Added a new color mask conformance test
  » We no longer implicitly define COGL_ENABLE_EXPERIMENTAL_2_0_API in the
    cogl-2.0-experimental.pc file cflags because the way pkgconfig works makes
    it hard to then consume libraries depending on cogl-2.0-experimental.pc
    with Clutter.
  » Made progress re-factoring cogl-pipeline.c to be more maintainable by
    starting to split the code up into more manageable pieces.
  » We now bind the locale dir for the Cogl domain during init
  » We now track backface culling state as part of CoglPipeline.

  • List of bugs fixed since Cogl 1.7.8

    https://bugzilla.gnome.org:

    #656442 - README points to wrong bug product
    #658092 - St ::hover transitions don't act as expected
    #658333 - Typo in cogl/cogl-display.h
    #658700 - Bind the locale domain so that gettext actually works
    #659029 - Clipping problem
    #659360 - Optimization in _cogl_winsys_onscreen_swap_region causes tearing

Many thanks too:
    Neil Roberts
    Matej Urbančič
    Abdalrahim G. Fakhouri
    Adel Gadllah
    Andika Triwidada
    Arash Mousavi
    Bruce Cowan
    Chun-wei Fan
    Duarte Loreto
    Emmanuele Bassi
    I Felix
    Ihar Hrachyshka
    Ioannis Zamboukas
    Laura Balbastre
    Luca Ferretti
    Manoj Kumar Giri
    Muhammet Kara
    Rudolfs Mazurs
    Tiffany Antopolski
    Wolfgang Stöggl
    Wouter Bolsterlee
    Xandru Armesto
    Yinghua Wang
    Yuri Myasoedov
    Мирослав Николић

Cogl 1.7.8                                                         2011-09-05

  • List of changes since Cogl 1.7.6

   » Getters for the display and renderer associated with context
   » Getter for the number of supported texture units during fragment
     processing. (ClutterGst needs to know this for example to know if GLSL
     based YUV->RGB color space conversion can be used.)
   » Optimizations for the GLSL codegen for fragment processing so we can
     ignore redundant layers - if for example the "REPLACE" function is used
     for layer N then computing anything for previous layers is redundant. Also
     if texture combining needs to sample the same texture multiple times we
     now re-use the same sample instead of repeating it.
   » Optimize texture uploads to a texture atlas on GLES by avoiding lots of
     redundant format conversions.
   » Relax the requirement to need braces around blend factors when using the
     CoglBlendString syntax. Braces are only needed for factors involving a
     subtraction like "(1 - SRC_COLOR[A])"
   » Adds API for querying the format of a CoglFramebuffer

  • List of bugs fixed since Cogl 1.7.6

    https://bugzilla.gnome.org:

    #656426 - Improve the generated GLSL code
    #656441 - Build failure in examples
    #656587 - Outdated FSF Address in code files
    #657347 - Retrieve the number of texture image units
    #657840 - Atlas-ed bitmaps converted too many times
    #656809 - cogl 1.7.6 doesn't compile on Fedora 16/17

Many thanks to:
    Damien Lespiau
    Neil Roberts
    Emmanuele Bassi

Cogl 1.7.6                                                         2011-08-12
===============================================================================

  • List of changes since Cogl 1.7.4

   » Add an experimental cogl_matrix_look_at function
   » Fix flipping the y-coordinates for cogl_framebuffer_swap_region
   » Automatically allocate framebuffers on first use
   » Add experimental cogl_framebuffer_clear functions
   » Add a function to get the context given a framebuffer
   » Add support for a cogl.conf config file
   » Fix using TEXTURE_n as the source for a layer combine
   » Some fixes for the WGL backend
   » Add experimental API to upload a texture subregion from a CoglBuffer

  • List of bugs fixed since Cogl 1.7.4

    https://bugzilla.gnome.org:

    #655026 - cogl-pango should not link to systemwide libcogl during make
              install
    #655216 - egl: Guard the feature discovery of eglCreateImage()
    #655228 - Bugs in cogl-quaternion library functions
              cogl_quaternion_init_from_array and
              cogl_quaternion_get_rotation_axis.
    #655355 - Make Cogl master work on EGL/GDL again
    #655400 - cogl-pipeline-fragend-arbfp: Initialise template_pipeline
    #655412 - Don't use the 'NULL' GModule to resolve GL symbols
    #655510 - Access Violation (a.k.a Segfault) in cogl/driver/gl/cogl-gl.c
    #655556 - Memory leak in function cogl_polygon in cogl-primitives.c
    #655723 - egl-gdl: Silence a gcc warning
    #655724 - egl-gdl: Don't generate cogl-display.h
    #656303 - Improve cogl-pango's journal usage
    #655792 - android: Commit the build.xml file
    #655791 - android: Update the hello example to the latest glib-android
              API change

Many thanks to:
    Robert Bragg
    Damien Lespiau
    Chun-wei Fan
    Alexandre Rostovtsev
    Kirk A. Baker
    Philip Withnall
    Florian Renaut

Cogl 1.7.4                                                         2011-07-20
===============================================================================

  • List of changes since Cogl 1.7.2

   » Optimize pipeline unparent operation using embedded lists instead
     of using GList API.
   » Remove the old matrix operation code we had before pulling in the
     mesa based code, and flatten all our matrix utilities back into one
     maintainable file.
   » Expose cogl_framebuffer_get_red/green/blue/alpha bits to query
     the precision for a framebuffer's color channels.
   » Numerous reference manual updates
   » Fix some memory leaks in CoglPipeline that weren't captured in
     bugzilla.
   » Fix some EGL winsys issues that weren't captured in bugzilla.
   » Switch to dynamically loading libGL, libGLESv2 or libGLES[v1]_CM
     at runtime so it's possible to distribute a libcogl that can choose
     to work with any of these at runtime. This can simplify packaging
     on distros that have numerous packages that provide a platform
     specific GL/GLES driver and certainly helps during the development
     process when evaluating the pros-and-cons of different drivers for
     a given platform.
   » Clean up lots of inconsistencies with platform specific APIs, so
     we follow the naming convention of cogl_<platform>_object_method.
   » Remove cogl_set_default_context from experimental 2.0 api, since
     we are aiming to remove the default context for 2.0
   » Ensure the experimental 2.0 reference manual gets a unique
     DOC_MODULE name so that distro's trying to package cogl don't end
     up installing the 1.x and 2.0 manuals to the same location
   » Add a program cache for the GLSL backend, a bit like we have for
     the ARBfp backend. This can be a big boost in performance for some
     apps depending on your platform.
   » Adds dither_enable getter and setter API for CoglFramebuffer so
     that Clutter doesn't need to use the GL API directly when picking.
     We need to get to the point where Clutter doesn't need to link
     against libGL directly so Clutter can take advantage of runtime
     driver selection by Cogl.
   » Use MESA_pack_invert extension in cogl_read_pixels to avoid
     needing to manually flip pixel data read in bottom-up order to a
     top-down order.
   » Fix the hello example to actually clear the framebuffer at the
     start of the frame instead of unintentionally relying on the driver
     to have cleared the framebuffer.

  • List of bugs fixed since Cogl 1.7.2

    https://bugzilla.gnome.org:

    #652514 - CoglPipeline could embed the list nodes for the
              children directly in the CoglPipeline struct
    #654440 - _cogl_winsys_context_init crash
    #654718 - clutter 1.6.16 compile issues
    #654593 - dlopening an unversionaed Shared Object is illegal.

Many thanks to:
    Neil Roberts
    Damien Lespiau
    Emmanuele Bassi
    Takeshi AIHANA

Cogl 1.7.2                                                         2011-07-01
===============================================================================

  • List of changes since Cogl 1.7.0

   » Add an example program to draw a 3D crate

   » Add experimental API to get and set the viewport on a framebuffer
     without going through the implicit context.

   » Add API to select the winsys backend without having to use an
     environment variable.

   » Various documentation fixes.

   » Add winsys-specific typesafe APIs to replace the old
     cogl_renderer_handle_native_event functions.

   » Rename platform-specific APIs so that we consistently have
     cogl_<platform>_symbol_name instead of cogl_symbol_name_<platform>.

   » Fixed building against GLES.

  • List of bugs fixed since Cogl 1.7.0

    https://bugzilla.gnome.org:

    #652672 - Typo fix in cogl-framebuffer
    #653615 - cogl_release_status='snapshot' breaks linking on 64-bit
              systems due to namespace conflict with ltoptions.m4
    #653229 - pipeline: Don't regenerate shaders when not changing the
              number of layers
    #653231 - pipeline: Don't trigger a change when binding the invalid
              texture target

Many thanks to:
  Robert Bragg
  Adam Jackson
  Emmanuele Bassi

Cogl 1.7.0                                                         2011-06-10
===============================================================================

  • List of changes since Clutter 1.6

    » Cogl split out into a standalone project!

    » Added native winsys backends for GLX, WGL, EGL and Android (Quartz in
      progress)
      » Supported EGL platforms include: NULL, X11, GDL and Wayland

    » Adds renderer,display,onscreen-template and swap-chain APIs for
      writing standalone apps using the experimental 2.0 API

    » Added convenience functions cogl_matrix_view_2d_in_frustum/perspective
      for setting up a Clutter style view transform for a 2d coordinate system
      inside a projective perspective.

    » Added an experimental Quaternion API

    » Added an experimental Euler API

    » Re-worked the CoglPipeline depth testing state API

    » Added EGL X11 texture-from-pixmap support.

    » Added a tiny Wayland compositor (without input support) under
      examples/

    » Optimizations:
      » Optimise paths that are just a rectangle
      » Journal: Use a pool of vertex-arrays to avoid allocation costs.

  • List of bugs fixed since Clutter 1.6

    http://bugzilla.clutter-project.org:
    #2538 - crash in gnome-shell
    #2544 - Using vertex buffers causes memory corruption when you unref the CoglHandle
    #2561 - Updates to COGL sources regarding non-standard code usage
    #2588 - Assertion failure in _cogl_pipeline_set_layer_texture_target
    #2594 - cogl-clip-state: Adapt to experimental cogl2 API.
    #2620 - _cogl_offscreen_new_to_texture_full() leaks reference when failing

    https://bugzilla.gnome.org:
    #641197 - mouse events at pixel row zero are ignored
    #650966 - CoglPipeline doesn't support any layers on fixed function hardware
    #650979 - cogl-pipeline-fragend-fixed: Fix enabling texture targets
    #651256 - configure fails for the poor sods who use dash as sh

Many thanks to:

  Neil Roberts
  Emmanuele Bassi
  Damien Lespiau
  James Athey
  Jasper St. Pierre
  Piotr Drąg