Commit Graph

2474 Commits

Author SHA1 Message Date
Neil Roberts
786d1b8e40 Split test-point-sprite into two, one without checking orientation
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)
2012-08-06 18:51:31 +01:00
Neil Roberts
2ae352b0a6 Fix point sprite coordinates in shaders on GLES2
When using the GLES2 driver with a pipeline layer that has point
sprite coordinates enabled it extracts the texture coordinates from
the gl_PointCoord builtin instead of cogl_tex_coord_in[*].
gl_PointCoord is not quite the same as the regular texture coordinates
because it is only a vec2 instead of a vec4. This used to work ok
because either set of texture coordinates would always immediately be
accessed using a swizzle of '.st' so it would effectively be converted
to a vec2 anyway. However since the snippet hook for texture lookups
was added the texture coordinates are now passed to a function to
perform the actual lookup instead. This function always takes a vec4
so the shader would not compile. This patch fixes it to construct a
vec4 from gl_PointCoord by setting the third and fourth components to
0.0 and 1.0.

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

(cherry picked from commit cb3409b23caf324a548f82cfb88acc684cc71930)
2012-08-06 18:51:31 +01:00
Alexander Shopov
960cf64d04 Updated Bulgarian translation
(cherry picked from commit 04b9a54263f175fc8302aa172befbed897e34dda)
2012-08-06 18:51:31 +01:00
Tomeu Vizoso
053845f796 framebuffer: Only remember offscreen allocate flags when !COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL
Otherwise, if a texture is created before all the other FBOs, a new
atlas will be created, with a FBO with COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL
causing last_offscreen_allocate_flags to be 0.

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

(cherry picked from commit 7d2156785da8196e129eb393efb0d09093c4783e)
2012-08-06 18:51:31 +01:00
Robert Bragg
1686e754a7 bitmap: Adds cogl_android_bitmap_new_from_asset()
This adds some android specific api for creating a CoglBitmap from an
Android asset.

As part of the work it also seemed like a good time to change the
internal bitmap constructors to take an explicit CoglContext argument
and so the public cogl_bitmap_new_from_file() api was also changed
accordingly to take a CoglContext pointer as the first argument.

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

(cherry picked from commit 099d6d1b505b55bbd09c50d081deb41ab5764e19)

  Since we aren't able to break APIs on the 1.12 branch this cherry-pick
  skips the change to cogl_bitmap_new_from_file()
2012-08-06 18:50:22 +01:00
Neil Roberts
d1dc4e1e0b Don't use the label 'ERROR' because it conflicts with windows.h
wingdi.h which gets included from windows.h #defines ERROR to 0 so we
can't use it as a label in Cogl. This patch changes it to be error in
lower case instead.

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

(cherry picked from commit e9bac2755c2cba84c82a856d369a30560d19a32e)
2012-08-06 14:27:45 +01:00
Neil Roberts
df77e8565e Don't use eglGetProcAddress to retrieve core functions
According to the EGL spec, eglGetProcAddress should only be used to
retrieve extension functions. It also says that returning non-NULL
does not mean the extension is available so you could interpret this
as saying that the function is allowed to return garbage for core
functions. This seems to happen at least for the Android
implementation of EGL.

To workaround this the winsys's are now passed down a flag to say
whether the function is from the core API. This information is already
in the gl-prototypes headers as the minimum core GL version and as a
pair of flags to specify whether it is available in core GLES1 and
GLES2. If the function is in core the EGL winsys will now avoid using
eglGetProcAddress and always fallback to querying the library directly
with the GModule API.

The GLX winsys is left alone because glXGetProcAddress apparently
supports querying core API and extension functions.

The WGL winsys could ideally be changed because wglGetProcAddress
should also only be used for extension functions but the situation is
slightly different because WGL considers anything from GL > 1.1 to be
an extension so it would need a bit more information to determine
whether to query the function directly from the library.

The SDL winsys is also left alone because it's not as easy to portably
determine which GL library SDL has chosen to load in order to resolve
the symbols directly.

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

(cherry picked from commit 72089730ad06ccdd38a344279a893965ae68cec1)

  Since we aren't able to break API on the 1.12 branch
  cogl_get_proc_address is still supported but isn't easily able to
  determine whether the given name corresponds to a core symbol or
  not.  For now we just assume the symbol being queried isn't part
  of the core GL api and update the documentation accordingly.
2012-08-06 14:27:45 +01:00
Neil Roberts
7cdaaf2bd5 Don't use the transpose argument of glUniformMatrix*
According to the GLES1/2 spec, the transpose argument of
glUniformMatrix* should always be FALSE. Cogl directly exposes the
transposedness of the uniform value in
cogl_pipeline_set_uniform_matrix and we were previously passing this
value on to GL. This patch makes it instead just always transpose the
matrix in Cogl itself when copying the value to the CoglBoxedValue. It
doesn't seem like there could be much advantage to letting GL
transpose the uniform value and at least Mesa just does a very similar
loop to handle the transpose.

Mesa has started being more pedantic about this which was making
test_pipeline_uniforms fail.

http://cgit.freedesktop.org/mesa/mesa/commit/?id=60e8a4944081b42127b3

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

(cherry picked from commit f42ee670ff663d03073d6b1038b21a0aa1b3ec2b)
2012-08-06 14:27:45 +01:00
Tomeu Vizoso
93d0de1d9a Mass rename CLUTTER_COMPILATION to COGL_COMPILATION
Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit a99512e5798e48ffa3a9a1a7eb98bc55647ee1b6)
2012-08-06 14:27:45 +01:00
Damien Lespiau
4ad1e9b83a Use <literal> not <pre> in the comments
Comments are interpreted as docbook snippets and <pre> is from html. The
closest maching tag for inline content seems to be <literal>.

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

(cherry picked from commit 66c9f26dfb3133f43d319128d6636f793a1ceb4a)
2012-08-06 14:27:45 +01:00
Damien Lespiau
829aafce98 Update the cogl_sdl_context_new() code snippet
The first argument has been removed from the function. Update the
example accordingly.

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

(cherry picked from commit 06e47af3144565bdf85abf8ae561c7ceeafa2cbc)
2012-08-06 14:27:45 +01:00
Damien Lespiau
0257a9591f Fix the inclusion of the SDL integration documentation
You had a mismatch between the file name in -sections.txt and
-docs.xml.in. Chose cogl-sdl.xml.

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

(cherry picked from commit 8b61963f3015e11bd5fbe225ec566ac6e354acc1)
2012-08-06 14:27:45 +01:00
Damien Lespiau
ecc5c96aeb Initialize the inverse matrix in invert_matrix_3d()
Contrary to the other inversion functions, invert_matrix_3d() does not
initialize the inverse to the identity and then only touches the
elements it cares about. Problem is the ww component is left alone,
which makes everything go to a black hole when using an inverse matrix
as the transform matrix of a framebuffer.

This is how cameras are typically implemented, they have a transform
and the framebuffer matrix stack is initialized with the inverse
of that transform. A gdb session gives away what happens:

The camera model view matrix, slightly rotation around the X axis:
camera mv       1.000000 0.000000 0.000000 0.000000
camera mv       0.000000 0.984808 -0.173648 0.000000
camera mv       0.000000 0.173648 0.984808 10.000000
camera mv       0.000000 0.000000 0.000000 1.000000

Breakpoint 5, invert_matrix_3d (matrix=0x8056b58) at ./cogl-matrix.c:671
671       const float *in = (float *)matrix;
(gdb) p *matrix
$1 = {xx = 1, yx = 0, zx = 0, wx = 0, xy = 0, yy = 0.98480773,
  zy = 0.173648164, wy = 0, xz = 0, yz = -0.173648164, zz = 0.98480773,
  wz = 0, xw = 0, yw = 0, zw = 10, ww = 1, inv = {0 <repeats 16 times>},
  type = 6, flags = 1030, _padding3 = 0}
(gdb) finish
Run till exit from #0  invert_matrix_3d (matrix=0x8056b58)
    at ./cogl-matrix.c:671
0x00141ced in _cogl_matrix_update_inverse (matrix=0x8056b58)
    at ./cogl-matrix.c:1123
1123          if (inv_mat_tab[matrix->type](matrix))
Value returned is $2 = 1
(gdb) p *matrix
$3 = {xx = 1, yx = 0, zx = 0, wx = 0, xy = 0, yy = 0.98480773,
  zy = 0.173648164, wy = 0, xz = 0, yz = -0.173648164, zz = 0.98480773,
  wz = 0, xw = 0, yw = 0, zw = 10, ww = 1, inv = {1, 0, 0, 0, 0, 0.98480773,
    -0.173648164, 0, 0, 0.173648164, 0.98480773, 0, -0, -1.73648167,
    -9.84807777, 0}, type = 6, flags = 1030, _padding3 = 0}

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

(cherry picked from commit 9a19ea0147eb316247c45cbba6bb70dec5b9be4c)
2012-08-06 14:27:45 +01:00
Neil Roberts
763c1de2ab Use the old GLSL extensions if GL 2.0 is not available
Some drivers have good support for GLSL but don't have the complete
set of features needed to advertise GL 2.0 support. We should accept
the three old GLSL extensions (GL_ARB_shader_objects,
GL_ARB_vertex_shader and GL_ARB_fragment_shader) to support shaders on
these drivers.

This patch splits the shader functions into four sections :- those
that are provided only in GL 2.0, those that have the same name in the
shader objects extension, those that are provided by the vertex
shader extension (they all share the same name) and those that have a
different name in the shader objects extension.

If GL 2.0 is not supported but all three of the extensions are then
the pointers to the GL2-only functions will be replaced to point to
the equivalent functions from the extensions. That way the rest of the
Cogl source doesn't have to worry about the name differences.

https://bugzilla.gnome.org/show_bug.cgi?id=677078

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

(cherry picked from commit 71ecb51bd20dc3053b4221961b57e5a2b1029bdf)
2012-08-06 14:27:45 +01:00
Neil Roberts
a3989d035e Fix removing layers when the pipeline is not the owner
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)
2012-08-06 14:27:45 +01:00
Neil Roberts
2e50693821 Add a conformance test for removing a pipeline layer
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)
2012-08-06 14:27:45 +01:00
Neil Roberts
17c818a9a7 Add an SDL2 winsys
This adds an alternate version of the SDL winsys using the SDL 2 API.
The two versions are mutually exclusive and share the same
CoglWinsysID. Version 2 of SDL fits a little bit better with Cogl
because it supports multiple windows and the video subsystem can be
initialised entirely independently of the rest of the subsystems.

The SDL2 winsys creates an invisible dummy window in order to bind the
GL context after creating the Cogl display. This is similar to how the
X11 winsys's work.

SDL2 seems to support compiling with support for both GL and GLES.
However there doesn't seem to be a way to select between the two
backends outside of SDL. In fact if you do compile them both in it
seems to break down because it will always try to use the window
system functions from the GLES backend because those are filled in
second in the vtable. However when creating the window it will always
prefer to use the GL function to choose a visual. This function gets
confused because the GL backend has not been initialised at that
point. The Cogl backend therefore just leaves it up to SDL to pick a
sensible backend. It will then verify that it picked a GL library
which matches the Cogl driver by checking the string from
glGetString(GL_VERSION).

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

(cherry picked from commit 6cb5ab41355e7bfe28f367cf4afa39a7afcfeec2)
2012-08-06 14:27:44 +01:00
Tomeu Vizoso
9a1f0c4098 cogl-gles2: Add glTexParameterf to wrapper library
Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 06d6bdb73e3d2468cf3a8c355152cbdeb1b36d94)
2012-08-06 14:27:44 +01:00
Sasi Bhushan Boddepalli
66dd06dea9 Updated Telugu Translation
(cherry picked from commit af5838f9e05348803960e5f2c4614b4ba4a204e6)
2012-08-06 14:27:44 +01:00
Damien Lespiau
a87b657d73 Add a note about [0, 0, 0] and cogl_vector3_normalize()
When having the [0, 0, 0] vector, normalize() won't try to divide by 0
and thus it's always safe to use that funtion.

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

(cherry picked from commit 64370e7ddd32f25556a1792c00d14adc48a81d45)
2012-08-06 14:27:44 +01:00
Tobias Endrigkeit
5a36ce4f43 [l10n] Updated German translation
(cherry picked from commit c8556f4e604d64d96b9e95100a3b76084cd94116)
2012-08-06 14:27:44 +01:00
Kristjan SCHMIDT
55ec6e1cb3 Updated Esperanto translation
(cherry picked from commit f252c6681ec7b045225e8bb0f948bf7afba6b8c5)
2012-08-06 14:27:44 +01:00
Rūdolfs Mazurs
df23d1c48e Updated Latvian translation
(cherry picked from commit f9abee10967d0ceb4a81f04e591b2566fcf8eab4)
2012-08-06 14:27:44 +01:00
Bruno Brouard
da5789ef3a Updated French translation
(cherry picked from commit e2700ab9f70278aeaf6829ddbeb54c2a4a343503)
2012-08-06 14:27:44 +01:00
Matej Urbančič
4d0c345ebe Updated Slovenian translation
(cherry picked from commit be12d556d6f4e6099a13990bc8a707d43de349a4)
2012-08-06 14:27:44 +01:00
Damien Lespiau
81bb87e037 Use the internal format to check if the texture size is supported
Until now, we hardcoded the internal format to GL_RGBA and used the
internal format returned by pixel_format_to_gl() as the format for
checking the texture size and format we're asked to create.

Let's use the proper internal format/format from now on.

This is needed as a later patch introduces DEPTH and DEPTH_STENCIL
textures.

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

(cherry picked from commit ec45f60ee2545f88302da314bcdbe1439c4ba9c9)
2012-08-06 14:27:44 +01:00
Damien Lespiau
e58b21017e Update .gitignore
The usual suspects (more examples ans tests, generated headers) and the
documentation updated to the cogl2 name.

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

(cherry picked from commit 90b07230692d3fb36ea18c651ae120e472b5380e)
2012-08-06 14:27:44 +01:00
Rico Tzschichholz
5c16ad65c5 build: add newly introduced header to fix make dist
Missing bit of 4bb6eff3dbd50d8fef7d6bdbed55c5aaa70036a8

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

(cherry picked from commit 1674cf28f1f5b71bd25a1f253c99825d427dd243)
2012-08-06 14:27:44 +01:00
Neil Roberts
9a654d173e Fix a typo in _cogl_matrix_init_translation
The y translation was being initialised with the z value and the z
translation was being left as 0.0.

(cherry picked from commit b44feb617ecb9cbf7d53f0d745f686c17ef3246d)
2012-08-06 14:27:43 +01:00
Neil Roberts
67a095b9dd Cache the debug wireframe snippet
When rendering the debug wireframe Cogl generates a child pipeline of
the application's pipeline to replace the fragment processing.
Previously it was creating a new snippet every time something was
drawn. Cogl doesn't attempt to compare the contents of snippets when
looking in the program cache for a matching pipeline so this would
cause it to generate a new program for every primitive. It then quite
quickly ends printing the warning about there being more than 50
programs in the cache. To fix that this patch makes it cache the
snippet so that Cogl can successfully recognise that it already has a
program generated for the new pipeline.

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

(cherry picked from commit c4bb08ee8767b5320980dba10b20921393cb5613)
2012-08-06 14:27:43 +01:00
Neil Roberts
1357c4c6a6 Preserve the CoglDrawFlags when drawing a wireframe
Previously the CoglDrawFlags passed to
_cogl_framebuffer_draw_indexed_attributes when drawing is redirected
to draw a wireframe are overriden to avoid validating the pipeline,
flushing the framebuffer state and flushing the journal. This ends up
breaking scenes that only contain models drawn from attributes in the
application because nothing will flush the matrices. It seems to make
more sense to just use whatever draw flags were passed from the
original draw command so that it will flush the matrices if the caller
was expecting it.

One problem with this is that if the wireframe causes the journal to
be flushed then it will already have temporarily disabled the
wireframe debug flag so the journal will not be drawn with wireframes.
To fix this the patch adds a CoglDrawFlag to disable the wireframe and
uses that instead of disabling the debug flag.

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

(cherry picked from commit 283f6733e63ba65d9921f45868edaabbd9420a61)
2012-08-06 14:27:43 +01:00
Neil Roberts
702873c199 matrix-stack: Prune stack entries when loading a replacement matrix
Previously if an application does not use the matrix stack as a stack
but instead just loads its own matrices for each frame using
cogl_framebuffer_set_modelview_matrix then it will continously push
OP_LOAD entries on the stack and the stack will grow forever. This
patch fixes that use case by resetting the top of the stack to the
last save entry whenever something is pushed that replaces the
previous matrix on the stack.

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

(cherry picked from commit d31ed33241a9e9e3bc25f01b2614678827a7a9aa)
2012-08-06 14:27:43 +01:00
Neil Roberts
9026acde8f Add a basic conformance test for eulers and quaternions
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)
2012-08-06 14:27:43 +01:00
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