_cogl_shader_compile_real spews a warning when
shader compilation fails if COGL_GL_DEBUG is
defined. This warning is never freed.
https://bugzilla.gnome.org/show_bug.cgi?id=672243
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The 1.0 wrapper for cogl_path_curve_to was using the wrong value for
y_1 so it wouldn't work.
The patch was written by Dénes Almási.
https://bugzilla.gnome.org/show_bug.cgi?id=672174
Reviewed-by: Neil Roberts <neil@linux.intel.com>
We initially assumed that copy_sub_buffer is synchronized on
which is only the case for a subset of GPUs for example it is not
synchronized on INTEL gen6 and gen7, so we remove this assumption
for now.
We should have a specific driver / GPU whitelist if we want to enable
this.
https://bugzilla.gnome.org/show_bug.cgi?id=669122
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Neil Roberts <neil@linux.intel.com>
None of the other cogl_is_blah functions have a const pointer so this
is just for consistency. It helps if someone is trying to have an
array of type-check function pointers to determine the Cogl object
type because in that case all of the functions would have to have the
same prototype.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This creates a CoglBitmap which points into an existing buffer in
system memory. That way it can be used to create a texture or to read
pixel data into. The function replaces the existing internal function
_cogl_bitmap_new_from_data but removes the destroy notify call back.
If the application wants notification of destruction it can just use
the cogl_object_set_user_data function as normal. Internally there is
now a convenience function to create a bitmap for system memory and
automatically free the buffer using that mechanism.
The name of the function is inspired by
cairo_image_surface_create_for_data which has similar semantics.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
On GLES, when reading texture data back it may need to allocate a
temporary CoglBitmap if the requested format is not supported by the
driver. Previously it would then copy this temporary buffer back into
the user's buffer by calling _cogl_bitmap_convert which would allocate
a second temporary buffer. It would then copy that data into the
user's buffer. This patch changes it to create a CoglBitmap which
points to the user's data and then convert directly into that buffer
using the new _cogl_bitmap_convert_into_bitmap.
This also fixes a small leak where target_bmp would not get freed if
the target format and the closest supported format do match.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The 2.0 API for querying features (cogl_has_feature etc) does not
conflict with the old 1.0 API (cogl_features_available) so we might as
well enable it when the experimental API is requested without
requesting the 2.0-only API.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The if-undefined fallback declaration for GL_PACK_INVERT_MESA was
originally added in cogl.c along with code to use it (as part of commit
6f79eb8a5a). Later on, commit
10a38bb14f moved the code that used it to
cogl-framebuffer.c but didn't move the define along with it. Do that
now.
https://bugzilla.gnome.org/show_bug.cgi?id=672038
Reviewed-by: Neil Roberts <neil@linux.intel.com>
-Removed checks for COGL_ENABLE_EXPERIMENTAL_API since these APIs are
always built into the shared library
-Re-organised the API listing a bit so that they are in alphabetical order
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This API was re-added into COGL for the 1.10.x release as of commit
361bd516f. This will be removed once we branch into the 1.11.x development
cycle.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
If the matrix was reallocated we would use values from the stack
for the matrix parameters. This fixes that and also uses the
function instead of out of lining the same code.
https://bugzilla.gnome.org/show_bug.cgi?id=671985
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This is only used internally when debugging is enabled to give a
human-readable name to a GL error so we shouldn't be exporting it
outside of the library. This just adds an underscore to the symbol
name. This shouldn't end up removing any public symbols from the 1.9.8
release because by default a non-git build disables debug so it wasn't
exported anyway.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The cleanup in 185630085 removed some symbols that were previously
exported as public experimental API in Cogl 1.9.8. That release is
already well after the point where we were meant to freeze the ABI so
we probably shouldn't be breaking it again. This patch adds the
removed functions back in so that for 1.9.10 we won't have to bump the
soname. The symbols are bundled together in a new file called
cogl2-compatibility.c so that they will be easy to remove again after
we can break ABI. It is expected that we will revert this patch
immediately after branching for Cogl 1.10.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
I don't think there's really any point in this cache because the
pipeline code completely owns the point size state. Pipelines are
already compared for whether their point size state is different
before setting it so it shouldn't result in any extra calls to
glPointSize apart from maybe when the first pipeline is initially
flushed.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
When using the GLSL vertend on GL, the point size was being flushed in
_cogl_pipeline_vertend_glsl_start. However, this function bails out
early if the pipeline already has a usable program so it would not hit
the code to flush the point size in that case. This patch moves the
code to _cogl_pipeline_vertend_glsl_end so that it will always be
flushed if it is different. That is the same place that is flushed for
the fixed vertend.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This option to GCC makes it give a warning whenever a global function
is defined without a declaration. This should catch cases were we've
defined a function but forgot to put it in a header. In that case it
is either only used within one file so we should make it static or we
should declare it in a header.
The following changes where made to fix problems:
• Some functions were made static
• cogl-path.h (the one containing the 1.0 API) was split into two
files, one defining the functions and one defining the enums so that
cogl-path.c can include the enum and function declarations from the
2.0 API as well as the function declarations from the 1.0 API.
• cogl2-clip-state has been removed. This only had one experimental
function called cogl_clip_push_from_path but as this is unstable we
might as well remove it favour of the equivalent cogl_framebuffer_*
API.
• The GLX, SDL and WGL winsys's now have a private header to define
their get_vtable function instead of directly declaring in the C
file where it is called.
• All places that were calling COGL_OBJECT_DEFINE need to have the
cogl_is_whatever function declared so these have been added either
as a public function or in a private header.
• Some files that were not including the header containing their
function declarations have been fixed to do so.
• Any unused error quark functions have been removed. If we later want
them we should add them back one by one and add a declaration for
them in a header.
• _cogl_is_framebuffer has been renamed to cogl_is_framebuffer and
made a public function with a declaration in cogl-framebuffer.h
• Similarly for CoglOnscreen.
• cogl_vdraw_indexed_attributes is called
cogl_framebuffer_vdraw_indexed_attributes in the header. The
definition has been changed to match the header.
• cogl_index_buffer_allocate has been removed. This had no declaration
and I'm not sure what it's supposed to do.
• CoglJournal has been changed to use the internal CoglObject macro so
that it won't define an exported cogl_is_journal symbol.
• The _cogl_blah_pointer_from_handle functions have been removed.
CoglHandle isn't used much anymore anyway and in the few places
where it is used I think it's safe to just use the implicit cast
from void* to the right type.
• The test-utils.h header for the conformance tests explicitly
disables the -Wmissing-declaration option using a pragma because all
of the tests declare their main function without a header. Any
mistakes relating to missing declarations aren't really important
for the tests.
• cogl_quaternion_init_from_quaternion and init_from_matrix have been
given declarations in cogl-quaternion.h
Reviewed-by: Robert Bragg <robert@linux.intel.com>
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the
cogl-wayland-renderer api symbols.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Some of the state when flushing a pipeline depends on the current
framebuffer being used. These are:
• The matrix stack, so that it can flip vertically or not depending on
whether the framebuffer is offscreen.
• The colormask. This is combined with the framebuffer's color mask.
• The cull face mode. If the framebuffer is offscreen then backface
culling is translated to frontface culling and vice-versa.
These states were not working if the new framebuffer draw_primitive
API was used because in that case the framebuffer is not pushed to the
framebuffer stack so it would use the wrong one. This patch changes it
to use ctx->current_draw_buffer which is a pointer to the framebuffer
whose state was last flushed.
https://bugzilla.gnome.org/show_bug.cgi?id=670793
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds a small cogl_bitmap_get_buffer public function. Note that
this can return NULL if the bitmap was not created with a pixel
buffer. It might be nice to change this eventually so that all bitmaps
have a pixel buffer.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The idea is that CoglPixelBuffer should just be a buffer that can be
used for pixel data and it has no idea about the details of any images
that are stored in it. This is analogous to CoglAttributeBuffer which
itself does not have any information about the attributes. When you
want to use a pixel buffer you should create a CoglBitmap which points
to a region of the attribute buffer and provides the extra needed
information such as the width, height and format. That way it is also
possible to use a single CoglPixelBuffer with multiple bitmaps.
The changes that are made are:
• cogl_pixel_buffer_new_with_size has been removed and in its place is
cogl_bitmap_new_with_size. This will create a pixel buffer at the
right size and rowstride for the given width/height/format and
immediately create a single CoglBitmap to point into it. The old
function had an out-parameter for the stride of the image but with
the new API this should be queriable from the bitmap (although there
is no function for this yet).
• There is now a public cogl_pixel_buffer_new constructor. This takes
a size in bytes and data pointer similarly to
cogl_attribute_buffer_new.
• cogl_texture_new_from_buffer has been removed. If you want to create
a texture from a pixel buffer you should wrap it up in a bitmap
first. There is already API to create a texture from a bitmap.
This patch also does a bit of header juggling because cogl-context.h
was including cogl-texture.h and cogl-framebuffer.h which were causing
some circular dependencies when cogl-bitmap.h includes cogl-context.h.
These weren't actually needed in cogl-context.h itself but a few other
headers were relying on them being included so this adds the #includes
where necessary.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds a public function to read pixels from a framebuffer into a
CoglBitmap. This replaces the internal function
_cogl_read_pixels_with_rowstride because a CoglBitmap contains a
rowstride so it can be used for the same purpose. A CoglBitmap already
has public API to make one that points to a CoglPixelBuffer so this
function can be used to read pixels into a PBO. It also avoids the
need to push the framebuffer on to the context's stack so it provides
a function which can be used in the 2.0 API after the stack is
removed.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Whenever the buffer is bound with _cogl_buffer_bind Cogl now ensures
the buffer's data store has been created. Previously it would only
ensure it was created when it was first mapped or when the first data
was set on it. This is necessary if we are going to use CoglBuffers
for retrieving data from GL. In that case the buffer won't be mapped
or have data set on it before it is used.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
If the fast-path inplace premult conversion can't be used then it will
now fallback to unpacking the buffer into a row of guint16s and use
the generic conversion.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds _cogl_bitmap_convert_into_bitmap which is the same as
_cogl_bitmap_convert except that it writes into an existing bitmap
instead of allocating a new one. _cogl_bitmap_convert now just
allocates a buffer and calls the new function. This is used in
_cogl_read_pixels to avoid allocating a second intermediate buffer
when the pixel format to store in is not GL_RGBA.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
If we are going to unpack the data into a known format anyway we might
as well do the premult conversion instead of delaying it to do
in-place. This helps because not all formats with alpha channels are
handled by the in-place premult conversion code. This removes the
_cogl_bitmap_convert_format_and_premult function so that now
_cogl_bitmap_convert is a completely general purpose function that can
convert from anything to anything. _cogl_bitmap_convert now includes a
fast path for when the base formats are the same and the premult
conversion can be handled with the in-place code so that we don't need
to unpack and can just copy the bitmap instead.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Previously the bitmap code was setup so that there could be an image
library used to convert between formats and then some 'fallback' code
when the image library can't handle the conversion. However there was
never any implementation of the conversion in the image library so the
fallback was always used. I don't think this split really makes sense
so this patch renames cogl-bitmap-fallback to cogl-bitmap-conversion
and removes the stub conversion functions in the image library.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
_cogl_bitmap_fallback_convert now supports converting to and from all
of the pixel formats, except it continues to preserve the premult
status of the original bitmap. The pixels are unpacked into a
temporary buffer that is either 8-bits per component or 16-bits per
component RGBA depending on whether the destination format is going to
use more than 8 bits per component (eg RGBA_1010102). The packing and
unpacking code is stored in a separate header which is included twice
to generate the functions needed for both sizes of unpacked data. The
hope is that when converting between two formats that are both 8-bit
sized, such as swizzling between BGRA and RGBA, then the
multiplications and divisions in the code will be optimized out and it
shouldn't be too inefficient. Previously the inner switch statement to
decide which conversion to use only operated on one pixel at a time so
it was probably relatively slow.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
There are a few places in Cogl that try to set the premult bit on a
pixel format depending on whether it has an alpha channel. However
this breaks if the pixel format is alpha-only because premultiplying
data without any RGB components doesn't make any sense. This adds an
internal macro to check for cases where we should add the premult bit
called COGL_PIXEL_FORMAT_CAN_HAVE_PREMULT. This now gets used in all
places that previously just checking for COGL_A_BIT.
https://bugzilla.gnome.org/show_bug.cgi?id=671016
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The assert could use a 'default:' label but that would stop GCC from
giving a warning when a new enum value is added.
https://bugzilla.gnome.org/show_bug.cgi?id=671016
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The Wayland winsys defines functions declared in
cogl-wayland-renderer.h so it should include the header to make sure
the declarations are right. This was breaking because currently the
header #defines the _EXP suffixes on to the function names so it would
end up exporting the wrong symbol names.
This adds api for explicitly choosing what underlying driver cogl should
use internally for rendering as well as api for querying back what
driver is actually in use.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
cogl_texture_get_data uses find_best_gl_get_data_format from the
texture driver which returns the closest format to use for retrieving
pixel data given an intended format. However this function doesn't
know about the texture we are reading data from so it doesn't know
that the data we will actually receive will have the same premult
status as the texture's format. With the GL driver, this function ends
up returning exactly the same format as passed in which means it will
never do a premult conversion. Under GLES it always returns
COGL_PIXEL_FORMAT_RGBA_8888 so it will always make the data unpremult
even if the final requested format is premultiplied.
This patch fixes it so that it copies the premult status of the
closest_format from the format of the underlying texture. That way it
will later convert or not depending on the requested target format.
Note this patch breaks test-sub-texture with the GL driver because
that is incorrectly trying to read the texture data back as RGBA_8888
even though it depends on it not doing a premult conversion. The test
was already broken with GLES2 and remains broken.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
If the GL_OES_packed_depth_stencil extension is available then we can
try creating a combined depth-stencil buffer with the
GL_DEPTH24_STENCIL8 format. This adds a private flag for the feature.
https://bugzilla.gnome.org/show_bug.cgi?id=666184
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The GL_DEPTH_STENCIL format for renderbuffers is defined in a separate
extension from GL_EXT_framebuffer_object so we probably shouldn't
being trying to use it unless that extension is advertised. This just
replaces the check for whether the driver is GL for a check for a
private feature flag before trying GL_DEPTH_STENCIL. The private
feature flag is set if the extension is available on GL.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
If an application tries to bind an attribute to cogl_tex_coord_in then
on GLES2 it would try to directly use that as the name of the GL
attribute. However in the generated shader that is actually #defined
to cogl_tex_coord0_in so we need to remap the name. This adds a
parameter to validate_cogl_attribute_name so that it can optionally
return a real_attribute_name. If it doesn't set this then the calling
function will default to the Cogl attribute name.
This fixes test-texture-3d with the GLES2 driver.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Needed for _cogl_texture_get_type so that C4013 warnings/implicit
declaration of ... warnings can be avoided.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The previous update missed renames of certain cogl_framebuffer_* functions
to cogl_onscreen_*, and were not updated as the glib-mkenums-generated
header no longer included experimental headers
Also, all comments in cogl.symbols are now done in C-style so that the
preprocessor will filter them out when processing cogl.symbols instead of
using ';' for commments, which could be MSVC-only
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The previous update missed renames of certain cogl_framebuffer_* functions
to cogl_onscreen_*, and were not updated as the glib-mkenums-generated
header no longer included experimental headers
Also, all comments in cogl.symbols are now done in C-style so that the
preprocessor will filter them out when processing cogl.symbols instead of
using ';' for commments, which could be MSVC-only
-Make up for the missed cogl_texture_pixmap_x11_* symbols
-Removed texture_3d _EXP suffixes
-For newly-exposed public cogl_pipeline_get_layer_*_filter APIs
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Now if COGL_ENABLE_EXPERIMENTAL_2_0_API has been defined when including
cogl.h then headers that correspond to 1.x only apis that we plan to
drop won't be included any more.
If COGL_ENABLE_EXPERIMENTAL_API is defined then you can still mix and
match 2.0 api with 1.x api in a single compilation unit.
Note: it's still possible that some 1.x symbols will still be available
when COGL_ENABLE_EXPERIMENTAL_2_0_API is defined since this patch
doesn't go through the shared headers adding guards around deprecated
functions.
This only affects people playing with the experimental api.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This also replaces use of CoglHandle with a CoglTexturePixmapX11 type
instead.
This patch also ensures the CoglTexturePixmapX11 constructor take an
explicit CoglContext pointer and can return a GError consistent with
other CoglTexture constructors.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This moves all the cogl_framebuffer_ apis relating to swap buffer
requests into the cogl_onscreen_ namespace since on CoglOnscreen
framebuffers have back buffers that can be swapped.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
As we move towards Cogl 2.0 we are aiming to remove the need for a
default global CoglContext and so everything should be explicitly
related to a context somehow. CoglPipelines are top level objects and
so this patch adds a context argument to cogl_pipeline_new().
Reviewed-by: Neil Roberts <neil@linux.intel.com>
There were several members of the CoglContext struct using the
CoglHandle type for things that now have replacement typedefs which
this patch fixes.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the cogl-texture-3d
api symbols.
This patch also replaces use of CoglHandle with a CoglTexture3D type
instead.
Finally this patch also ensures the CoglTexture3D constructors take an
explicit CoglContext pointer but not a CoglTextureFlags argument,
consistent with other CoglTexture constructors.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Previously for the wireframe debug mode we identified the users
"cogl_position_in" attribute, mapped that, created a replacement
attribute with a LINE_LIST topology and then drew the attribute with a
simple pipeline with a green colour. This meant we completely discarded
the users original pipeline which may have involved vertex processing
that would be useful to visualize in the wireframe.
The new approach instead keeps the users attributes and instead
generates CoglIndices that can be used to refererence the original
attributes in LINE_LIST topology and instead of scrapping the user's
pipeline we now create a weak copy of the original pipeline and just
replace the fragment processing with a snippet to force the output color
to be green.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This improves the implementation of _cogl_pipeline_equal() to ensure
that the cost of the function scales by the number of bits set in the
pipelines_difference variable set after calling
_cogl_pipeline_compare_differences() instead of scaling by the number of
state groups cogl tracks.
As Cogl tracks more and more state groups we don't want
_cogl_pipeline_equal() to get slower.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
If setting NULL user data via cogl_object_set_user_data() and we fail to
find an entry for the given key then bail out before potentially
allocating a new entry since setting NULL data is documented to
effectively delete an entry.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This exposes cogl_pipeline_get_layer_{min,max}_filter functions so that
applications can query back the filters set using
cogl_pipeline_set_layer_filters().
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The cogl.h header is meant to be the public header for including the 1.x
api used by Clutter so we should stop using that as a convenient way to
include all likely prototypes and typedefs. Actually we already do a
good job of listing the specific headers we depend on in each of the .c
files we have so mostly this patch just strip out the redundant
includes for cogl.h with a few fixups where that broke the build.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The _cogl_texture_driver_pixel_format_to_gl functions for OpenGL and
OpenGLES convert CoglPixelFormats into corresponding gl enums that can
be used to upload texture data. Previously we were only handling a few
specific formats but this patch updates the functions to handle all the
formats we know about. The functions now also switch() on the format so
that we will get build time warnings if we forget to handle new formats
in these functions.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
https://bugzilla.gnome.org/show_bug.cgi?id=660188
edit: tweaked the internal format returned by pixel_format_to_gl();
handled 1010102 formats and rebased -- Robert Bragg
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The previous detection was based on bits per pixel only and would
consider bpp >= 24 as X888 or 8888 24-bit color depth formats.
This commit ensures we now use the newly added
_cogl_util_pixel_format_from_masks() api that returns a CoglPixelFormat
according to channel masks and color depth. This helps to add support
for more pixel formats.
https://bugzilla.gnome.org/show_bug.cgi?id=660188
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This adds a utility function for inferring a CoglPixelFormat from a
set of channel masks, a bits-per-pixel value, a pixel-depth value and
pixel byte order.
This plan is to use this to improve how we map X visuals to Cogl pixel
formats.
This patch was based on some ideas from Damien Leone <dleone@nvidia.com>
https://bugzilla.gnome.org/show_bug.cgi?id=660188
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This adds a comment to cogl-types.h where we define all the
CoglPixelFormat enums to give lots of information about the internal
representation of the format and to explain how new formats should be
allocated.
This information came from the discussion in bug #660188
Reviewed-by: Neil Roberts <neil@linux.intel.com>
30-bit color depth formats are defined by using value 13 in the least
significant nibble of the pixel format enumeration. This nibble
encodes bytes-per-pixel and byte alignment.
The _cogl_pixel_format_get_bytes_per_pixl() function is updated
accordingly to support these new formats.
https://bugzilla.gnome.org/show_bug.cgi?id=660188
edit: dropped the X101010 formats but also added 1010102 formats since
Cogl avoids exposing any padded formats and leaves it to applications to
consider the A component to be padding as needed. -- Robert Bragg
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Although these are in the public headers we should assume that no one is
using them since they were never documented so no could know what they
are useful for.
If you were to guess you'd be forgiven for thinking they were bitmasks
for checking some flags to see if a format is 24 or 32 bits. If you
looked further you might instead be forgiven for thinking that if you
masked of the least significant nibble of a pixel-format then you could
check the value against these defines. Neither of the previous
operations are reliable ways to check if a format is 24 or 32bit and
instead code must use then internal
_cogl_pixel_format_get_bytes_per_pixel() api if they want to know the
pixel size for a given format which relies on a 16 entry lookup table
using the least significant nibble of a pixel-format.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Although it's in a public header nothing should be using this define
since it's not documented what it could be used for. The cases where we
were using it internally were quite fragile because they were trying to
mask information from the least significant nibble of CoglPixelFormat
but really that nibble just has to be dealt with using lookup tables.
The least significant nibble of a pixel format gives information about
the bytes per pixel and whether the components are byte aligned but the
information needs to be accessed using
_cogl_pixel_format_get_byes_per_pixel() and
_cogl_pixel_format_is_endian_dependant().
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Since (A & ~COGL_PREMULT_BIT) is basically as readable as (A &
COGL_UNPREMULT_MASK) this patch removes the mask define. Without the
mask the code is slightly more explicit and there's less risk in error
caused by us forgetting to update the COGL_UNPREMULT_MASK if the way
CoglPixelFormat is defined evolves.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This adds an internal utility function
_cogl_pixel_format_is_endian_dependant() that can query whether
accessing the components of a given format depends on the endianness of
the current host CPU or whether a pixel can be loaded as a word and
channels accessed using bit masking and shifting.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This moves _cogl_get_format_bpp from cogl-bitmap.c to cogl.c and renames
it to _cogl_pixel_format_get_bytes_per_pixel. This makes it clearer that
it doesn't return bits per pixel and makes the naming consistent with
other cogl api. The prototype has been moved to cogl-private.h since it
seems we should be aiming to get rid of cogl-internal.h at some point.
The patch also adds a simple gtk-doc comment since we might want to make
this api public.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
So we can get to the point where cogl.h is merely an aggregation of
header includes for the 1.x api this moves all the function prototypes
and type definitions into a cogl-context.h and a new cogl1-context.h.
Ideally no code internally should ever need to include cogl.h as it just
represents the public facing header for accessing the 1.x api which
should only be used by Clutter.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Ideally we wouldn't have exposed cogl-texture-pixmap-x11.h as a
top level header and would have just automatically included it in cogl.h
but we already have code that assumes it can be directly included.
This ensures we define __COGL_H_INSIDE__ as a reminder that it is a top
level header in case we later need to include other cogl internal cogl
headers which would cause a build time error without this defined.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The cogl_public_h variable in cogl/Makefile.am was a mixture of 1.x
headers and experimental headers which meant that glib-mkenums was
processing lots of experimental api headers. This patch lists
experimental api headers under the cogl_experimental_h variable instead.
This patch also ensures we undef the COGL_ENABLE_EXPERIMENTAL_* defines
when running the gobject introspection scanner for Cogl-1.0.gir
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The get_all_uniform_values function tries to walk the parent hierarchy
of pipelines to find pipelines overriding the uniforms state and then
grabs the values from the override. However it was accessing data
inside the ‘big state’ even if the pipeline didn't override the
uniforms state so it would crash if it encountered a parent pipeline
with no big state.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The snippet hook COGL_SNIPPET_HOOK_TEXTURE_LOOKUP now gets passed an
extra variable called cogl_sampler which is the sampler attached to
this layer. For example this will be useful when implementing the blur
effect in Clutter so that it can make the texture hook for that layer
sample the texture multiple times.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
There might be custom hooks that want to sample arbitrary layers
even though they aren't referenced as part of the auto generated layer
combine code. This ensures the sampler uniforms are always output for
non-null layers so at least these can be used.
We may consider changing this later to always emit a wrapper
cogl_sampleX() function for each layer so all samples of a layer can
consistently be modified by a COGL_SNIPPET_HOOK_TEXTURE_LOOKUP hook.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
When generating GLSL code, the names of the builtin uniforms for the
sampler and the layer constant have been renamed to use the layer
number not the unit number. This will make it easier if we ever want
to make them public.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
In a combine string the application can specify TEXTURE_? as a source
to sample from the texture attached to a particular unit. The number
specified here was being interpreted as a unit index. This is not
helpful to applications because theoretically the unit index is an
internal implementation detail so they can't reliably determine what
it is. This patch changes them to be interpreted as layer indices
instead.
To make this work the enums in CoglPipelineCombineSource are no longer
directly mapped to GLenums. Otherwise it implies a low limit on the
number of layer indices because there are only 32 reserved numbers
between GL_TEXTURE0 and GL_ACTIVE_TEXTURE.
This also fixes a bug in the ARBfp fragend where it was generating
code using the texture type of the layer doing the referencing rather
than the layer that was being referenced.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds _cogl_pipeline_get_layer_with_flags which takes a set of
flags to modify the behaviour. The only flag currently available is
one to disable creating the layer if the layer index does not already
exist.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds a public function to replace the texture for a layer with
the default white texture. It is equivalent to calling
cogl_pipeline_set_layer_texture with NULL for the texture object
except that it also lets you choose a type for the texture. The idea
is that applications using a base pipeline to make multiple copies
that can share the generated shaders can use this function to make the
layer come into existence with the right texture type. Previously the
idiom would be to create a 1x1 dummy texture of the right type but
this ends up creating lots of redundant little textures.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
When comparing the texture data for a pipeline layer it tries to get
the GL texture handle out of the texture object. However it's valid
for a layer to have a NULL texture object but in that case the code
would just crash. This patch fixes it to compare the texture types
when the texture object is NULL.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Instead of storing the GLenum for the target of the last used texture
for a layer it now stores the CoglTextureType instead. The state name
has been renamed to 'texture type' instead of 'texture target'.
Previously the default pipeline layer would store 0 here to represent
that there is no texture. This has been changed to store
COGL_TEXTURE_TYPE_2D instead which means that all pipeline layers
always have a valid value for the texture type. Any places that were
previously fetching the texture from a layer to determine the target
(for example when generating shaders or when enabling a particular
texture target) now use the texture type instead. This means they will
work even for layers that don't have a texture.
This also changes it so that when binding a fallback texture instead
of always using a 2D texture it will now use the default texture
corresponding to the texture type of the layer. That way when the
generated shader tries to do a texture lookup for that type of texture
it will get a valid texture object. To make this work the patch adds a
default texture for 3D textures to the context and also makes the
default rectangle texture actually be a rectangle texture instead of
using a 2D texture.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds an internal function to get the type of the underlying
hardware texture for any CoglTexture. It can return one of three
values to represent 2D textures, 3D textures or rectangle textures.
The idea is that this can be used as a replacement for
cogl_texture_get_gl_texture when only the target is required to make
it a bit less GL-centric. The implementation adds a new virtual
function which all of the texture backends now implement.
The enum is in a public header because a later patch will want to use
it from the CoglPipeline API. We may want to consider making the
function public too later.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Just being a bit paranoid here, as the SDL winsys sources are dealt in the
projects as they are not built for all configurations to avoid them
included more than once in the projects, which can cause trouble.
https://bugzilla.gnome.org/show_bug.cgi?id=669785
Reviewed-by: Neil Roberts <neil@linux.intel.com>
-Adapt to the removal of _EXP mangling from many of the experimental
functions
-Adapt to newly added/replaced APIs
-_cogl_handle_atlas_texture_get_type is gone
https://bugzilla.gnome.org/show_bug.cgi?id=669785
Reviewed-by: Neil Roberts <neil@linux.intel.com>
-Add a define for COGL_HAS_GLIB_SUPPORT, the Visual C++ projects will build
GLib support for COGL for all builds at this time, unless there is a
significant call for the need of a COGL Visual C++ build with no
dependency on GLib
-Pre-define COGL_SYSDEF_POLL* as listed in the default values in commit
74974752 since Windows does not have poll.h and thus does not have special
values for these.
https://bugzilla.gnome.org/show_bug.cgi?id=669785
Reviewed-by: Neil Roberts <neil@linux.intel.com>
All CoglBuffer constructors now take an explicit CoglContext
constructor. This is part of the on going effort to adapt to Cogl API so
it no longer depends on a global, default context.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
When using COGL_DEBUG=wireframe we were overlaying a wireframe of the
users geometry over the top of what was drawn for each primitive. It
seems to be more useful though that if the wireframe debug option has
been enabled then we should draw only the wireframes instead of
overlaying them.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Since we are adapting the Cogl api to be less stateful one of the things
we no longer require is the cogl_set_source() api since a pipeline can
be explicitly passed as an argument when drawing. This means the term
"source" has been deprecated and internally we should aim to
consistently use the term "pipeline" instead. This patch updates the
journal code to use the term pipeline instead of source.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Although we internally had a COGL_DEBUG_WINSYS enum we weren't providing
a way to enable that via the COGL_DEBUG environment variable. This adds
a "winsys" option that can be used to enable printing of winsys debug
notes.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the display api
symbols.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This adds cogl_framebuffer_ apis for drawing attributes and primitives
that replace corresponding apis that depend on the default CoglContext.
This is part of the on going effort to adapt the Cogl api so it no
longer depends on a global context variable.
All the new drawing functions also take an explicit pipeline argument
since we are also aiming to avoid being a stateful api like Cairo and
OpenGL. Being stateless makes it easier for orthogonal components to
share access to the GPU. Being stateless should also minimize any
impedance miss-match for those wanting to build higher level stateless
apis on top of Cogl.
Note: none of the legacy, global state options such as
cogl_set_depth_test_enabled(), cogl_set_backface_culling_enabled() or
cogl_program_use() are supported by these new drawing apis and if set
will simply be silently ignored.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Previously when using the cogl_rectangle_* family of functions with a
pipeline that doesn't have a texture for a particular layer then
validate_tex_coords_cb would bail out immediately leaving the texture
coords for that layer uninitialised. This patch changes it so that it
bails out after copying in the texture coordinates instead. This was
causing problems for pipelines that were trying to completely generate
the texture values in a CoglSnippet because they wouldn't get any
texture coordinates.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This ensures we don't call swap buffer notify callback functions
immediately when they are received since it could be awkward for
applications to ensure they have dropped all necessary locks if they
don't know when callbacks might be invoked.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This adds a cogl_kms_renderer_get_kms_fd() function that lets developers
access the kms file descriptor being used for controlling the kernel
mode setting.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The recent patch to add an api for explicitly constraining how a
renderer backend is chosen had a typo which this patch fixes.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
When creating a texture from a wayland buffer we create an intermediate
EGLImage that we then create a GL texture from, but we were never
destroying that EGLImage. This patch ensures we destroy the image right
after we've created the texture so we don't leak a reference to the
underlying buffer.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Instead of having each winsys implement its own list of callbacks the
list is now just attached directly to the CoglOnscreen using code in
cogl-onscreen.c. The winsys's can invoke this list of callbacks by
calling _cogl_onscreen_notify_swap_buffers(). All of the winsys's
would probably have a very similar implementation for this anyway and
I don't think it makes much sense to try and save the cost of a list
pointer in the CoglOnscreen struct.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds a public function to iterate the attributes of a
CoglPrimitive. Previously there was no way to query back the
attributes but there was methods to query back all of the other
properties.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds a public function to make a copy of a primitive. The copy is
shallow which means it will share the same attributes and attribute
buffers. This could be useful for code that wants to have multiple
similar primitives with slightly modified properties.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
There was no other way to get a pointer to the texture attached to a
pipeline layer apart from the using the CoglMaterial API but I think
this was just an oversight so we should add this in. It is already
maked in the sections file for the gtk-doc.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Both the cogl_texture_get_data and _cogl_blit_begin implementations
will internally try to create an FBO for a texture and have fallbacks
if the FBO fails. However neither of them were catching errors when
allocating the framebuffer so the fallback wouldn't work properly.
This patch just adds an explicit call to cogl_framebuffer_allocate for
these uses and causes it to use the next fallback if it fails.
Based on a patch by Adel Gadllah.
https://bugzilla.gnome.org/show_bug.cgi?id=669368
Reviewed-by: Robert Bragg <robert@linux.intel.com>
When calling cogl_texture_get_data we need to ensure that any
framebuffers rendering to the texture have flushed their journals.
https://bugzilla.gnome.org/show_bug.cgi?id=668913
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Instead of flushing the journal whenever the current framebuffer on a
context is changed it is now flushed whenever the framebuffer is about
to be destroyed instead. To do this it implements a custom unref
function which detects when there is going to be exactly one reference
on the framebuffer and then flushes its journal. The journal now
always has a reference on the framebuffer whenever it is non-empty.
That means the unref will only cause a flush if the only thing keeping
the framebuffer alive is the entries in the journal.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
The virtual function gets called in cogl_object_unref. Any definition
of a CoglObject type can replace the default unref function by using
COGL_OBJECT_DEFINE_WITH_CODE to directly manipulate the
CoglObjectClass struct. The generated object constructors set the
pointer to the default implementation. The default implementation is
exported in the private header so that any overriding implementations
can chain up to it.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Unlike in GObject the type number for a CoglObject is entirely an
internal implementation detail so there is no need to make a GQuark to
make it safe to export out of the library. Instead we can just
directly use a fixed pointer address as the identifier for the type.
This patch makes it use the address of the class struct of the
identifier. This should make it faster to do type checks because it
does not need to call a function every time it wants to get the type
number.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This moves the pointer members of CoglObject to the top and the int
members to the bottom so that there won't be any padding inserted on
64-bit machines. This reduces the size of the struct from 80 bytes to
72.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Some GLSL-related function prototypes are GLES2-only: GL implementations
are not required to provide them.
While Mesa is perfectly happy to return a dummy function pointer for
functions it doesn't support, other platforms are more picky, and will
return NULL.
In this particular case, this commit fixes GLSL support on OSX.
https://bugzilla.gnome.org/show_bug.cgi?id=668856
Reviewed-by: Neil Roberts <neil@linux.intel.com>
Resizing a wayland client framebuffer should not affect the viewport
of additional primitives drawn to that framebuffer before the next swap
buffers request nor should querying the framebuffer's width and height
be affected until the next swap buffers request completes.
This patch changes cogl_wayland_onscreen_resize() so it only saves the
new geometry as "pending" state internal to the given CoglOnscreen. Only
when cogl_framebuffer_swap_buffers() is next called will the pending
size be flushed to the wayland egl api.
We've avoiding using the redundant glib typedefs such as guint, gint
gpointer etc and prefer to use the equivalent C types so this patch
removes a few uses of gint that slipped past review.
This adds cogl_onscreen_template_set_swap_throttled() api that allows
developers to specify their preference for swap buffer throttling
up-front as part of the onscreen template that is used to create a
CoglDisplay when initializing Cogl. This is desirable because some
platforms may not support configuring swap throttling on a per
framebuffer basis and also since applications often want to apply the
same policy to all onscreen framebuffers anyway.
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the matrix api
symbols.
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the snippet api
symbols.
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the cogl framebuffer
symbols.
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the cogl.h symbols.
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the onscreen
framebuffer api symbols.
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the cogl-pipeline
symbols.
It proved to be inconvenient that we had a special CoglVector3 typedef
for vectors instead of just accepting pointers to float arrays because
you'd so often end up having to make awkward casts from another vector
type into a CoglVector3 and then cast back again. We're hoping that
taking float pointers instead will lead to less unnecessary casting.
We are in the process of removing all _EXP suffix mangling for
experimental APIs (Ref: c6528c4b6c) and adding missing gtk-doc
comments so that we can instead rely on the "Stability: unstable"
markers in the gtk-doc comments. This patch tackles the symbols in
cogl-renderer.h.
This allows applications to specify certain constraints that feed into
the process of selecting a CoglRenderer backend. For example
applications might depend on x11 for handling input and so they require
a backend that's also based on x11.
The shm buffer format enum values were renamed and the explicitly
premultiplied format was dropped since it's now assumed if the buffer
has an alpha component then it's premultiplied.
This function will call into the Wayland EGL platform API and resize the
surface that the window is using and update the internal dimensions for
framebuffer and viewport to reflect the change.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Previously the swap event notification feature was only accessible as
a winsys feature using the semi-internal
cogl_clutter_winsys_has_feature. This just adds a feature ID for it so
it can also be accessed via cogl_has_feature.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Originally we decided to use #define tricks to rename all experimental
symbols so that they had an _EXP suffix so it would be a bit clearer for
those wanting to check for ABI changes that they shouldn't worry about
these experimental symbols.
We feel now though that the defines are a bit more hassle than they are
really worth, since they are one extra thing to remember when coding,
they make using gdb slightly more awkward since you have to use the real
symbol name to set breakpoints and we already have a mechanism for
declaring symbols as experimental via gtk-doc that can be used by anyone
wanting to check for ABI changes.
Instead of just using a script to remove all the #defines we are going
to go through them manually because we need to make sure the symbols
are marked as unstable via gtk-doc. This patch does a first batch of
define removals and in fact some of the symbols didn't have any
documentation at all so that needed to be added too.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
This workaround code has just been incrementally carried forward since
Cogl was integrated with Clutter but really we have no idea when this
code path was ever tested. Since the work around is from before the time
of the current Cogl developers we don't know anything about the
circumstances which led to this extreme workaround instead of pushing to
fix a driver.
It seems pretty likely we can push to fix any drm based drivers so
we're removing the workaround.
https://bugzilla.gnome.org/show_bug.cgi?id=667009
Reviewed-by: Neil Roberts <neil@linux.intel.com>
GCC will define __ARM_ARCH_4T__ when building with "-march=armv4t" so we
can check this to turn off the use of 'clz' instructions, which
otherwise would cause compile errors like "selected processor does not
support ARM mode `clz r3,r0'".
Signed-off-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Joshua Lock <josh@linux.intel.com>
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Emmanuele Bassi <ebassi@linux.intel.com>
The GSource is created using cogl_glib_source_new which takes a
pointer to a CoglContext. The source calls cogl_poll_get_info() in its
prepare function and cogl_poll_dispatch() in its dispatch
function. The poll FDs on the source are updated according to what
Cogl reports.
The header is only included and the source only compiled if Cogl is
configured with GLib support.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
Previously we relied on the application to send all X events through
Cogl using cogl_xlib_renderer_handle_event. This breaks the
abstraction that an application shouldn't need to know what winsys
Cogl is using. Now that we have main loop integreation in Cogl, the
Xlib-based winsys's can report that Cogl needs to block on the file
descriptor of the X connection and it can manually handle the
events.
The event retrieval can be disabled by an application if it calls the
new cogl_xlib_renderer_set_event_retrieval_enabled() function. The
event retrieval will also automatically be disabled if the application
sets a foreign display.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This adds two new functions:
void
cogl_poll_get_info (CoglContext *context,
CoglPollFD **poll_fds,
int *n_poll_fds,
gint64 *timeout);
void
cogl_poll_dispatch (CoglContext *context,
const CoglPollFD *poll_fds,
int n_poll_fds);
The application is expected to call the first function whenever it is
about to block to go idle, and the second function whenever it comes
out of idle. This gives Cogl winsys's the ability poll file
descriptors for events. For example when handing swap complete
notifications, it can report that it needs to block on a file
descriptor.
The two functions are backed by winsys virtual functions. There are
currently no implementations. The default handler for get_info just
reports no file descriptors and an infinite timeout.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
This splits up cogl-ext-functions.h in to sets of prototypes that
can be included separately so that we can include just core
gles1 or gles2 functions without any extensions.
Since eglGetProcAddress can not be used to query core client APIs
and some implementations (notably on Android) can return a garbage
pointer instead of NULL this will allow us to explicitly check
when to use eglGetProcAddress and when to use dlsym().
Reviewed-by: Neil Roberts <neil@linux.intel.com>
If we need to realloc the uniforms overrides array for a pipeline to
insert a new override then we copy the old state into the new allocation
for the entries surrounding the inserted entry.
This patch fixes a mistake in how we copied the old entries that follow
the inserted entry since we were actually copying to begining of the new
allocation and potentially reading from beyond the extents of the old
allocation.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
The foreach_sub_texture_in_region implementation tries to forward the
function on to its child texture but it was mistakenly forwarding back
on to itself so it would just recurse endlessly and crash.
The SDL winsys was missing a few minor features, such as the
implementation. This patch adds that in.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
CoglTexture2D had an assert to verify that the EGL winsys was being
used. This doesn't make any sense any more because the EGL winsys
can't be used directly but instead it is just a base winsys for the
platform winsys's. To fix this this patch adds a set of 'criteria'
flags to each winsys, one of which is 'uses EGL'. CoglTexture2D can
use this to determine if the winsys is supported.
Eventually we might want to expose these flags publically so that an
application can select a winsys based on certain conditions. For
example, an application may need a winsys that uses X or EGL but
doesn't care exactly which one it is.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
