Commit Graph

2741 Commits

Author SHA1 Message Date
Neil Roberts
5e8ff248d2 Add functions to directly transform from a euler or a quaternion
This adds the following new functions to apply a rotation described by
a euler or a quaternion to either a CoglMatrix or directly to the
modelview stack of a framebuffer:

cogl_matrix_rotate_quaternion
cogl_matrix_rotate_euler
cogl_framebuffer_rotate_quaternion
cogl_framebuffer_rotate_euler

The direct framebuffer functions have corresponding functions in the
CoglMatrixStack to store an entry describing the rotation.

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

(cherry picked from commit 5064315678b496395e1d01f266f322d73e55e324)
2012-08-06 14:27:43 +01:00
Neil Roberts
aa749bb177 matrix-stack: Fix the _cogl_matrix_entry_equal function
The _cogl_matrix_entry_equal function has a large switch statement to
do the right kind of comparison for the entry. However most of the
entries have a return statement that is only conditionally reached.
There were no corresponding break statements to the case labels so
presumably if the comparison succeeded for the correct entry type it
would also flow through and try the comparison for the next type which
would be extremely unlikely to pass.

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

(cherry picked from commit 339db0f9cc3ee2bee4c56f9cb05dcb4ddd6815ed)
2012-08-06 14:27:43 +01:00
Neil Roberts
6eb8864866 Add a cogl_matrix_init_from_euler function
This creates a matrix to represent the given euler rotation. This
should be more efficient than creating the matrix by doing three
separate rotations because no separate intermediate matrices are
created and no matrix multiplication is needed.

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

(cherry picked from commit e66d9965897999a4889063f6df9a20ea6abf97fe)
2012-08-06 14:27:43 +01:00
Neil Roberts
0210cc40f9 Make cogl_matrix_init_from_quaternion take a const quaternion
The quaternion is not modified so for consistency with the rest of the
API it should probably be const.

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

(cherry picked from commit 7fa8c05c2ffb90cba03289a04e37866efc0890a5)
2012-08-06 14:27:43 +01:00
Neil Roberts
bdc8a12ea1 Fix the documentation for cogl_quaterinon_init_from_array
The documentation for cogl_quaternion_init_from_array contradicts
itself and says that the array is w,x,y,z in one part but x,y,z,w in
another. This fixes it to say w,x,y,z in both parts.

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

(cherry picked from commit b08a81e5dfb05fec867c08c689237fae937341ad)
2012-08-06 14:27:43 +01:00
Neil Roberts
b977d75059 Fix disabling debugging
When --disable-debug is passed to the configure script it was actually
still defining COGL_ENABLE_DEBUG so very little would end up being
disabled. If COGL_ENABLE_DEBUG actually got defined it would also fail
to compile because _cogl_debug_instances and COGL_DEBUG_N_LONGS from
cogl-debug.h were only defined if debugging is enabled but they are
used regardless.

This patch also makes it so that the _COGL_RETURN_IF_FAIL family of
macros that are used when glib support is disabled are now disabled if
debugging is disabled. When the glib macros are used they are already
disabled because we additionally define G_DISABLE_CHECKS.

'COGL_HANDLE_DEBUG' has been removed from the list of defines passed
when debugging is enabled because CoglHandle has already been removed
and it is not used anywhere in the code.

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

(cherry picked from commit 9811a0101c9cbb4ab95c55a2b41fd10ff4c77d9f)
2012-08-06 14:27:43 +01:00
Neil Roberts
06c3a7bc70 Fix a warning on test-gles2-context
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)
2012-08-06 14:27:43 +01:00
Neil Roberts
59ffa9abdd Don't build cogl-gles2-gears if configured with --disable-cogl-gles2
The cogl-gles2-gears example will fail to build unless
--enable-cogl-gles2 is enabled in the configure script because it
depends on libcogl-gles2. This patch makes it only conditionally build
the example depending on the BUILD_COGL_GLES2 automake conditional.

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

(cherry picked from commit 7f57e9c444b6353ac17e920ea4fc63ebe3cc29d3)
2012-08-06 14:27:43 +01:00
Robert Bragg
498937083e Adds gles2-context renderer constraint
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)
2012-08-06 14:27:43 +01:00
Robert Bragg
8d0b771cd3 conform: Adds a gles2 context test
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)
2012-08-06 14:27:42 +01:00
Robert Bragg
0047a1f604 Adds a cogl-gles2-gears example
This adds an example of using libcogl-gles2 as a way to port existing
GLES 2.0 based code. This is a port of es2gears in the Mesa demos repo.

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

(cherry picked from commit fcb947178858e9d675c5f76e50510282c6b0bf8d)
2012-08-06 14:27:42 +01:00
Robert Bragg
10340a5495 Adds libcogl-gles2 frontend GLES2 api
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)
2012-08-06 14:27:42 +01:00
Robert Bragg
010d16f647 Adds initial GLES2 integration support
This makes it possible to integrate existing GLES2 code with
applications using Cogl as the rendering api.

Currently all GLES2 usage is handled with separate GLES2 contexts to
ensure that GLES2 api usage doesn't interfere with Cogl's own use of
OpenGL[ES]. The api has been designed though so we can provide tighter
integration later.

The api would allow us to support GLES2 virtualized on top of an
OpenGL/GLX driver as well as GLES2 virtualized on the core rendering api
of Cogl itself. Virtualizing the GLES2 support on Cogl will allow us to
take advantage of Cogl debugging facilities as well as let us optimize
the cost of allocating multiple GLES2 contexts and switching between
them which can both be very expensive with many drivers.

As as a side effect of this patch Cogl can also now be used as a
portable window system binding API for GLES2 as an alternative to EGL.

Parts of this patch are based on work done by Tomeu Vizoso
<tomeu.vizoso@collabora.com> who did the first iteration of adding GLES2
API support to Cogl so that WebGL support could be added to
webkit-clutter.

This patch adds a very minimal cogl-gles2-context example that shows how
to create a gles2 context, clear the screen to a random color and also
draw a triangle with the cogl api.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 4bb6eff3dbd50d8fef7d6bdbed55c5aaa70036a8)
2012-08-06 14:27:42 +01:00
Neil Roberts
f729798f03 Convert the test-atlas-migration test to a standalone Cogl test
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)
2012-08-06 14:27:42 +01:00
Robert Bragg
3f2cb89a76 Fix depth testing, write enable bug
This fixes a bug in _cogl_pipeline_flush_color_blend_alpha_depth_state
whereby we were only calling flush_depth_state if we knew that at least
depth testing was enabled. This didn't take into account that enabling
and disabling depth writing is a useful change to make even if depth
testing is disabled. It also seemed a bit messy to flush the
depth-testing enable separately from the other depth state.

_cogl_pipeline_flush_color_blend_alpha_depth_state now simply calls
flush_depth_state() if there is a _DEPTH_STATE difference and
flush_depth_state() also handles flushing the depth-testing enable
in along with all the other depth state.

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

(cherry picked from commit 6a9dfc55b8f55d7023cb592e5bef2118d0f3d50c)
2012-08-06 14:27:42 +01:00
Robert Bragg
fb636008ad By default enable swap throttling
This ensures that when we initialize a CoglOnscreenTemplate that
->swap_throttled is set to TRUE so by default Cogl applications should
have their swap buffer requests throttled to the vblank frequency.

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

(cherry picked from commit bdac9ab56284fb84ec09af176c7e31c44dc1bfc6)
2012-08-06 14:27:42 +01:00
Robert Bragg
a945890de6 Workaround drisw bug where clipped redraws don't work
This detects when we are running on any of Mesa's software rasterizer
backends and disables use of glBlitFramebuffer and glXCopySubBuffer.
Both of these currently result in full-screen copies so there's little
point in using these to optimize how much of the screen we present.

To help ensure we re-evaluate this workaround periodically we have added
a comment marker of "ONGOING BUG" above the workaround and added a note
to our RELEASING document that says we should grep for this marker and
write a NEWS section about ongoing bug workarounds.

https://bugzilla.gnome.org/show_bug.cgi?id=674208

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

(cherry picked from commit 11f2f6ebb42398978ec8dd92b3c332ae8140a728)
2012-08-06 14:27:42 +01:00
Robert Bragg
b8e380edc3 gpu-info: Detect more info including architecture
The GPU info api previously told us a driver package name and a driver
vendor name, but now we have introduced detection for the gpu
architecture too and started to track architecture feature flags that
can tell us whether a gpu is a deferred or immediate mode renderer for
example or if a software rasterizer is being used.

This also adds support for checking more vendor names. We should now
detect the following cases:

Vendors: Intel, Imagination Technologies, ARM, Qualcomm, Nvidia, ATI
Architectures: Sandybridge, SGX, Mali
Architecture flags:
  - vertex tiled
  - vertex immediate mode
  - vertex software
  - fragment deferred
  - fragment immediate mode
  - fragment software

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

(cherry picked from commit b3803a0a7c9e663ed219e83626841895c7d95ad7)
2012-08-06 14:27:42 +01:00
Chun-wei Fan
37fbfffcd0 Visual C++ 2008 support: Add note in README.txt
Tell people that they need to get a stdint.h implementation for Visual C++
2008 for use with Cogl-master/1.99.x+, and where they can obtain such an
implementation.

This is not needed for Visual C++ 2010 as it ships with stdint.h by
default.

(cherry picked from commit 938d70b78d672dd07e7124f7573d17d3e3079365)
2012-08-06 14:27:42 +01:00
Chun-wei Fan
feaaaad6a0 Update cogl.symbols
There are numerous APIs added/removed in the following commits:
e7f15826 Add a CoglPrimitiveTexture interface
6197e3ab Add constructors which take a CoglBitmap to all primitive textures
bdb645e7 kms: defer setting crtc modes until first swap buffers
9a1f1df8 Rework sdl integration api
ac0c72ab Removed legacy cogl-fixed 1.x api
e8c4c80c Remove deprecated cogl_vertex_buffer api
06d522cb Remove the legacy CoglPath API
713a8f81 Replace cogl_path_{stroke,fill} with framebuffer API
6ed3aaf4 Removes all remaining use of CoglHandle
068b3b59 matrix: Add a init_translation() constructor

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

(cherry picked from commit 2625354b8accaebe33ee2747ff03f665aea07e4f)
2012-08-06 14:27:42 +01:00
Chun-wei Fan
23becf67a7 Fix Visual C++ build
-Create a pre-defined cogl/cogl-gl-header.h(.win32) that is to be used on
 any Windows builds, and adapt the MSVC build process to set up and use
 that file.
-Fix up glib-mkenums code generation .bat file that is generated during
 "make"/"make dist", like the autotools-based builds.
-Since cogl/cogl-defines.h now contain versionioning info, and it no longer
 directly includes the GL headers, update the pre-configured
 cogl-defines.h[.win32|.win32_SDL] and use autotools to fill in the
 versioning info during "make"/"make dist".
-Fix up cogl/cogl-pango.rc.in so that they reflect the cogl-2.x versioning
 stuff correctly and versioning info can be filled in correctly during
 "make"/"make dist"

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

(cherry picked from commit 7ff42bb1c5280b0f53370f8d94ef5f10c9f39e2f)
2012-08-06 14:27:42 +01:00
Damien Lespiau
e6b75b6cfc quaternion: Fix typo in the init_from_z_rotation documentation
Clearly from a copy and paste from init_from_y_rotation().

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

(cherry picked from commit 2f06f4d79e29bbf30a44edbf48e8eaa637e30930)
2012-08-06 14:27:42 +01:00
Damien Lespiau
ba864707ac doc: Fix a couple of renamed symbols
cogl_framebuffer_{get,set}_point_samples_per_pixel() have lost the
'point_' part.

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

(cherry picked from commit 3c8bcf391090ad0c5f65f300458bfc901fd62800)
2012-08-06 14:27:41 +01:00
Damien Lespiau
f5ca6733c4 doc: Remove the inclusion of non-existent cogl-clipping.xml
The API is now gone, so cogl-clipping.xml is not generated.

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

(cherry picked from commit ff3956c25676c898948c5c7239c85154564c0e16)
2012-08-06 14:27:41 +01:00
Damien Lespiau
542fdcd2b0 doc: Hide the private fields of CoglQuaternion
Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit a98a69017cdf8879816c1a341e4982b57ef1bc32)
2012-08-06 14:27:41 +01:00
Damien Lespiau
86a5259578 doc: Include the documentation for CoglEuler
Several little changes were needed to make the CoglEuler documentation
appear:

  • Fix the embeded docbook snippet in the CoglEuler section header
  • Add the xinclude directive to the main document
  • Add the missing <SECTION> in -sections.txt

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

(cherry picked from commit c7f6e07f7b8ba0d7dc9604e888c8a46165ec3ed4)
2012-08-06 14:27:41 +01:00
Damien Lespiau
e172cac480 quaternion: Document init_from_quaternion()
Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 91c2a3580a6055fcb6902524d3e8354f27932e89)
2012-08-06 14:27:41 +01:00
Damien Lespiau
28655fd608 quaternion: Document init_from_euler()
Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 018703a8e83835e7ab522f5e011fdd4a039523a2)
2012-08-06 14:27:41 +01:00
Chun-wei Fan
413862e49e Visual C++ projects Update
Update SDL build configs as there are now SDL-specific public APIs and
new SDL sources.

(cherry picked from commit 006f9f7c44136fc8524649fb790da7f19cd0dc4d)
2012-08-06 14:27:41 +01:00
Hajime Taira
aa1a4a4349 [l10n] Update Japanese translation
(cherry picked from commit 891fb62fd3a2edc025239cb881c253669ebb048d)
2012-08-06 14:27:41 +01:00
Damien Lespiau
7ff0b52d78 matrix: Add a init_translation() constructor
This allows people to initialize a matrix with a translation
transformation. The options to do it at the moment were:

* init_from_array() but it give cogl no information about the type of
  matrix.
* init_indentity() and then translate() but it means doing a lot of
  computations for no reason.

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

(cherry picked from commit 068b3b59221e405dc288d434b0008464684a7c12)
2012-08-06 14:27:41 +01:00
Neil Roberts
68a6e82828 Add support for the WebOS version of SDL
The stock 1.2.x version of SDL only supports regular OpenGL. The
version on WebOS is specially patched to add some extra API to request
a GLES1 or GLES2 context. This patch adds a configure check to detect
when Cogl is being built with the patched version of SDL. In that case
it will additionally allow the gles1 and gles2 drivers and set the
right video mode attributes to get the corresponding context.

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

(cherry picked from commit 3726c60deab2bd94617a562abb63f735627a25e4)
2012-08-06 14:27:41 +01:00
Neil Roberts
1d3d1732bd Fixes for building with --disable-gl
This fixes a few problems that occur when only using a GLES2 header.

• The use of GL_CLAMP_TO_BORDER and GL_MIRRORED_REPEAT were moved from
  cogl-pipelinelayer-state.h to cogl-sampler-cache-private.h but the
  corresponding defines were not.

• cogl-sampler-cache.c was using GL_TEXTURE_WRAP_R but this is only
  defined as GL_TEXTURE_WRAP_R_OES from the GLES2 header so it needs a
  #define.

• cogl-framebuffer-private.h uses GLuint but it does not include
  cogl-gl-header.h. It gets away with this when GLX support is enabled
  because the GL header would be included via glx.h.

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

(cherry picked from commit 9cdb87c864fc262c4b26c13963670d60d7c18058)
2012-08-06 14:27:41 +01:00
Marek Černocký
3dbe49acc3 Updated Czech translation
(cherry picked from commit 8d28126ce207a52d4d39e928101fbb0b6ecfebbf)
2012-08-06 14:27:41 +01:00
Neil Roberts
d57fcd952e buffer: Use GL_STREAM_DRAW on GLES2
The function to convert the CoglBufferUpdateHint to a GL enum was
previously ifdef'd to only use GL_STREAM_DRAW when Cogl is compiled
with big GL support. One problem with this is that it would end up
trying to use it on GLES1 if support for both is compiled. The other
problem is that GLES2 seems to actually support GL_STREAM_DRAW so we
might as well use it in that case.

This patch also changes it so that if the hint is stream with GLES1
then it will default to GL_DYNAMIC_DRAW instead of GL_STATIC_DRAW
because I think that is closer to the meaning of the stream hint.

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

(cherry picked from commit 9e997476a7f9271bc000abdc82b1e343b92afb4c)
2012-08-06 14:27:41 +01:00
Κωνσταντίνος Χόρτης
2db173c316 Updated Greek translation
(cherry picked from commit c80ddb4545d2f72e12c9eecff98222923e29f5d4)
2012-08-06 14:27:41 +01:00
Christian Kirbach
7261952b23 [l10n] Updated German translation
(cherry picked from commit 1420a0bedef311fe7b7f5045f1efc458020e1175)
2012-08-06 14:27:41 +01:00
Neil Roberts
85efb7daba Don't typedef CoglMemoryStack twice
CoglMemoryStack was being typedef'd twice, once in the private header
as an incomplete struct and once in the C source with the actual
struct definition. This removes the second typedef so that it just
defines the struct.

This patch was written by Jack River.

https://bugzilla.gnome.org/show_bug.cgi?id=675119

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

(cherry picked from commit 75cd425a48e0fc403bf88eace212a6d37b65df11)
2012-08-06 14:27:41 +01:00
Fran Diéguez
805a6247e8 Updated Galician translations
(cherry picked from commit 28df0d2f0d56b3d87c6a4a245fe78f12cac39c9d)
2012-08-06 14:27:40 +01:00
Fran Diéguez
8952b77bd6 Updated Galician translations
(cherry picked from commit 9547b04bc4edfc908c8e87201ee8c0a7870c0242)
2012-08-06 14:27:40 +01:00
Yaron Shahrabani
ed6f2377b6 Updated Hebrew translation.
(cherry picked from commit 359824e6708f95b74525f440b6b35041f3bce293)
2012-08-06 14:27:40 +01:00
Neil Roberts
0492f50834 Fixes for make dist
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)
2012-08-06 14:27:40 +01:00
Daniel Mustieles
d0c939c177 Updated Spanish translation
(cherry picked from commit 9365b68b117bda7363c4e7dd797133d8a8e9eaba)
2012-08-06 14:27:40 +01:00
Robert Bragg
9cf7aac80f Allow npot Texture2D creation with only basic npot support
Cogl has feature flags for basic npot texture support and then separate
flags for npot + repeat and npot + mipmap. If those three features are
available then there is a feature for full-npot support too for
convenience. The cogl_texture_2d_new_ constructors were checking for
full npot support and failing if not available but since we expose the
fine grained features to the user the user should be able to check the
limitations of npot textures and still choose to allocate them.

_cogl_texture_2d_can_create() now only checks for basic npot support
when creating a npot texture.  Since this change also affects the
automagic cogl_texture_ constructors they now check for basic npot +
mipmap support before considering using a Texture2D.

Notably the cogl_texture_ constructors will try constructing a Texture2D
even if we don't have npot + repeat support since the alternative is a
sliced texture which will need manual repeating anyway. Accordingly the
Texture2D::can_hardware_repeat and ::transform_quad_coords_to_gl vfuncs
have been made aware of the npot + repeat feature flag.

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

(cherry picked from commit 6f6c5734d076372d98d0ec331b177ef7d65aa67d)
2012-08-06 14:27:40 +01:00
Neil Roberts
b6b9ac0b85 Add a cogl-version header
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)
2012-08-06 14:27:40 +01:00
Robert Bragg
8b22b0da65 journal: avoiding some _cogl_matrix_entry_get()'s
When uploading the vertices the journal calls _cogl_matrix_entry_get()
to get a CoglMatrix for each journal entry so that it can so a software
transform. Since _cogl_matrix_entry_get() can be a performance hot-spot
and since it's trivial to keep track of the last CoglMatrixEntry seen we
now avoid repeatedly calling _cogl_matrix_entry_get() for sequential
entries with the same transform.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 70cad61533316e2303b8e188f2f361701dfb0c61)
2012-08-06 14:27:40 +01:00
Robert Bragg
e3d6bc36d3 Re-design the matrix stack using a graph of ops
This re-designs the matrix stack so we now keep track of each separate
operation such as rotating, scaling, translating and multiplying as
immutable, ref-counted nodes in a graph.

Being a "graph" here means that different transformations composed of
a sequence of linked operation nodes may share nodes.

The first node in a matrix-stack is always a LOAD_IDENTITY operation.

As an example consider if an application where to draw three rectangles
A, B and C something like this:

cogl_framebuffer_scale (fb, 2, 2, 2);
cogl_framebuffer_push_matrix(fb);

  cogl_framebuffer_translate (fb, 10, 0, 0);

  cogl_framebuffer_push_matrix(fb);

    cogl_framebuffer_rotate (fb, 45, 0, 0, 1);
    cogl_framebuffer_draw_rectangle (...); /* A */

  cogl_framebuffer_pop_matrix(fb);

  cogl_framebuffer_draw_rectangle (...); /* B */

cogl_framebuffer_pop_matrix(fb);

cogl_framebuffer_push_matrix(fb);
  cogl_framebuffer_set_modelview_matrix (fb, &mv);
  cogl_framebuffer_draw_rectangle (...); /* C */
cogl_framebuffer_pop_matrix(fb);

That would result in a graph of nodes like this:

LOAD_IDENTITY
      |
    SCALE
    /     \
SAVE       LOAD
  |           |
TRANSLATE    RECTANGLE(C)
  |     \
SAVE    RECTANGLE(B)
  |
ROTATE
  |
RECTANGLE(A)

Each push adds a SAVE operation which serves as a marker to rewind too
when a corresponding pop is issued and also each SAVE node may also
store a cached matrix representing the composition of all its ancestor
nodes. This means if we repeatedly need to resolve a real CoglMatrix
for a given node then we don't need to repeat the composition.

Some advantages of this design are:
- A single pointer to any node in the graph can now represent a
  complete, immutable transformation that can be logged for example
  into a journal. Previously we were storing a full CoglMatrix in
  each journal entry which is 16 floats for the matrix itself as well
  as space for flags and another 16 floats for possibly storing a
  cache of the inverse. This means that we significantly reduce
  the size of the journal when drawing lots of primitives and we also
  avoid copying over 128 bytes per entry.
- It becomes much cheaper to check for equality. In cases where some
  (unlikely) false negatives are allowed simply comparing the pointers
  of two matrix stack graph entries is enough. Previously we would use
  memcmp() to compare matrices.
- It becomes easier to do comparisons of transformations. By looking
  for the common ancestry between nodes we can determine the operations
  that differentiate the transforms and use those to gain a high level
  understanding of the differences. For example we use this in the
  journal to be able to efficiently determine when two rectangle
  transforms only differ by some translation so that we can perform
  software clipping.

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

(cherry picked from commit f75aee93f6b293ca7a7babbd8fcc326ee6bf7aef)
2012-08-06 14:27:40 +01:00
Robert Bragg
882ff5612b Adds a "magazine" allocator for chunks of fixed size
This adds a very minimal and fast allocator for chunks of memory of a
predetermined size. This has some similarities to the glib slice
allocator although notably it is not thread safe and instead of
internally tracking multiple magazines for various sized allocations the
api lets you explicitly allocate a single magazine for a single specific
size and a pointer to the magazine is passed explicitly to the allocate
and free functions.

This allocator builds on the CoglMemoryStack allocator as an underlying
heap allocator and just never rewinds the stack. This means the heap is
effectively a grow only linked list of malloc()'d blocks of memory.

A CoglMagazine tracks a singly linked list of chunks of a predetermined
size and _cogl_magazine_chunk_alloc() simply unlinks and returns the
head of the list. If the list is empty it falls back to allocating from
the underlying stack.

_cogl_magazine_chunk_free() links the chunk back into the singly linked
list for re-use.

The chunk size passed to _cogl_magazine_new() is automatically rounded
to a multiple of 8 bytes to ensure that all stack allocations end up
aligned to 8 bytes. This also ensures that when a chunk is freed then it
will be large enough to store a pointer to the next free chunk as part
of a singly linked list.

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

(cherry picked from commit 17799c2f109a008d6cf767f501b81aa9b32bbda8)
2012-08-06 14:27:40 +01:00
Robert Bragg
97d5406aef Adds internal CoglMemoryStack utility API
This adds a very minimal internal allocator api that lets us create a
dynamically growable (grow only) stack.

Underlying the allocator is the idea of "sub stacks" which are simply
malloc()'d chunks of memory kept in a linked list. The stack itself
maintains a pointer to the current sub-stack and a current
sub-stack-offset. 99% of the time allocating from the stack is just a
case of returning a pointer to the current sub-stack + sub-stack-offset
and bumping the offset by the allocation size. If there isn't room in
the current sub-stack then we walk through the list of free sub-stacks
looking for one that's big enough for the allocation and if we reach the
end of the list then we allocate a new sub-stack twice as big as the
last (or twice as big as the requested allocation if that's bigger).

Since it's a stack model there is no api to free allocations, just a
function to rewind the stack to the beginning.

We expect this to be useful in multiple places in Cogl as an extremely
fast allocator in cases when we know we can scrap all the allocations
after we're done figuring something out or as a building block for
other allocators.

For example the tessellator used for CoglPath allocates lots of tiny
structures that can all be freed after tessellation.

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

(cherry picked from commit 6ee4a7a1b7f695bdfeb10ffa4112e776beea0a9d)
2012-08-06 14:27:40 +01:00
Robert Bragg
e16b42a1b9 tests: Adds journal micro benchmark
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)
2012-08-06 14:27:39 +01:00