Clutter no longer hard-codes a resolution of 96 DPI (although that's
still the default), so any assertions of sizes for physical units
may be off.
Fix this by setting up the test environment according to the
assumptions.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/419
While mapping the :first/:last-child pseudo classes directly to the
ClutterActor:first-child/:last-child properties allows for an easy
implementation, it is unexpected that rules can appear to not have
an effect because the selected child is hidden. GTK's behavior of
applying the classes to visible children makes much more sense, so
change our implementation to do the same.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/312
It might happen that the target clutter actor that we return on call
of st_texture_cache_load_sliced_image might be destroyed while the
loading task is still running. To protect from this, let's connect
to "destroy" signal and when this happens we use a cancellable to
stop the task.
This allows to safely reuse the return value of this function to
cancel the execution and avoiding that load_callback is called
even for a request that is not anymore under our control.
https://bugzilla.gnome.org/show_bug.cgi?id=765011
When loading an actor for a sliced image actor, we can now use the
REQUEST_CONTENT_SIZE request-mode for the actor since we the content image
has now a predictable size and thus we can be sure that the size will be applied
taking care of the resource scale.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/5
Create StImageContent as a simple ClutterImage with preferred width/height
properties in order to be able to use explicit sizing when creating clutter
contents that will be applied to actors whose size depends on the content itself.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/5
Instead of just passing a scale when getting a cached icon, pass both a
'paint_scale', the scale of which the icon will be painted on the
stage, and a 'resource_scale', the scale of the resource used for
painting.
In effect, the texture size will use the scale 'paint_scale * resource_scale'
in a ceiled value while the size of the actor will use 'paint_scale' when
determining the size.
this would load a bigger texture, but the downscaling would keep the visual
quality.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/5https://bugzilla.gnome.org/show_bug.cgi?id=765011
Create the surfaces for background shadows at scaled sizes and then draw on them
using logical coordinates, by setting the surface device scale accordingly.
Use the said surface scale when generating the actual shadow cairo pattern
but in such case, to reduce the number of code changes, is better to work in
absolute coordinates, and to do so:
1) Create a temporary shadow-spec copy with scaled values to absolute sizes
2) Invert the scaling on the shadow matrix
3) Do the actual painting in absolute coordinates
4) Set the shadow matrix scaling back to the logical coordinates.
Finally scale down the created shadow pattern surface size when painting it,
applying again a reverse scale to the matrix.
https://bugzilla.gnome.org/show_bug.cgi?id=765011https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/5
Pass resource-scale to drawing phase, and use it to create texture
surfaces scaled with the widget current scaling.
Also redraw by default widgets when the resource scale changes.
https://bugzilla.gnome.org/show_bug.cgi?id=765011
A fractional resource scale would mean we never use the fast path for
creating the shadow, because we'd cast the int to a float before
comparing, which would never match.
Instead compare the expected texture size with the source texture, to
actually potentially trigger the fast path.
https://bugzilla.gnome.org/show_bug.cgi?id=765011
The fade shader will draw the fade effect up until the border pixel. If
we set the bottom right coordinate to the outer edge of the pixel we
might end up not drawing the fade effect on all of the pixels. This
could for example happen if one logical pixel (clutter stage pixel)
consists of more than one physical pixel.
https://bugzilla.gnome.org/show_bug.cgi?id=765011
This commit makes StWidget manage the scale of which its associated
resources should be multiplied with. The resource scale is calculated
by clutter, and is retrieved by clutter_actor_get_resource_scale(). Due
to the resource scale not always being available, the getter may fail,
and the actual widget that draws the content will have to deal with
this situation.
As the resource scale depends on where on the stage the widget is drawn,
the resource scale will in general be available once the widget is
mapped.
https://bugzilla.gnome.org/show_bug.cgi?id=765011
Since commit deec0bf255, the texture cache is based on ClutterImage
rather than ClutterTexture. As ClutterImage (like all ClutterContent)
is only concerned with painting, it doesn't influence the size of the
actor it is added to at all, and the returned actor will now stay at
size 0x0 after the image has been loaded.
Set up the actor to follow the content's size instead, to get closer
to the previous behavior.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/402
In order to replace GTK+'s GtkDirectionType. It's bit-compatible with it,
too. All callers have been updated to use it.
This is a purely accessory change in terms of X11 Display usage cleanup,
but helps see better what is left.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/317
In order to replace GTK+'s GtkPolicyType. It's bit-compatible with it, too.
All callers have been updated to use it.
This is a purely accessory change in terms of X11 Display usage cleanup,
but helps see better what is left.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/317
_st_create_shadow_pipeline_from_actor creates shadow pipelines
from actors. This function special-cases ClutterTexture as a
small performance improvement, since we can have access to the
CoglTexture easily with it. However, recent commits removed all
usage of ClutterTexture from GNOME Shell, rendering this optimization
useless. Instead, actors now may have a ClutterImage set as
their content, that can be used instead.
Replace the check for ClutterTexture with a check for ClutterImage,
and use the texture of the image when it is available.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/371
This drops usage of Gtk/X11, replacing it with code that is dependent
of the Clutter backend in use. Another positive side effect is that
the keymap state will now be correct on wayland, since there were no
guarantees that X11 key state would reflect the current reality.
https://bugzilla.gnome.org/show_bug.cgi?id=762881
The last patch in the series, this one adapts StShadowHelper
to received a CoglFramebuffer. This is where we first touch
JavaScript with Cogl types, and as such, it depends on the
latest Mutter. Earlier versions of Mutter didn't have its
Mutter-Clutter GIR to generate types for various Cogl types.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/283
Same case of the previous patch; _st_paint_shadow_with_opacity()
uses cogl_get_draw_framebuffer(), and this patch makes it receive
a CoglFramebuffer as a parameter instead.
The cautious reader might notice that this commit apparently goes
against the long-term goal, for it introduces more instances of
cogl_get_draw_framebuffer(). This is not wrong, but these introduced
ones will be removed later on, when ClutterActor.paint() receives
a CoglFramebuffer as a parameter instead.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/283
This is in preparation for a future where only explicit frambuffer
APIs are available, i.e., cogl_get_draw_framebuffer() does not
exist.
There is absolutely no functional changes in this patch (nor the
following ones in this series), only rearrangements so that various
functions receive a CoglFramebuffer instead of using the draw
framebuffer.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/283
Handling those events is neccessary if a touch event that pressed down a
button turns out to be a gesture. In this case the button should be
released without emitting the clicked signal.
After loading the GdkPixbuf, StTextureCache unconditionally
creates a ClutterImage and, if it's not in the cache, add
it to the cache. That's a waste of resources when the image
is already committed to the texture cache.
Fix that by reusing the ClutterImage of the cache if it is
already there; otherwise, create a new ClutterImage as we
were previously doing.
ClutterTexture is a deprecated class that is simultaneously
an actor, and the content of the actor. Clutter's new model
is to separate painting (via ClutterContent) from actors.
Currently, StTextureCache relies on ClutterTexture to store
the loaded textures. This not only does not match the latest
practices of Clutter, but also generates various compile-time
warnings.
Port StTextureCache to store ClutterImages instead of storing
ClutterTextures. ClutterImage exposes the internal CoglTexture,
so no helpers are needed to match the current StTextureCache
API. Aspect ratio was dropped, but from my testing, it doesn't
change anything.
When computing the effective border color, we operate on colors with
premultiplied alpha to simplify the calculations, then unpremultiply
the result. However we miss a bounds check in the last check, so any
color component can overflow the allowed maximum of 0xff and shift the
result in unexpected ways.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/305
If the actor is not on the stage yet (i.e. does not have a theme
node), but has a paint state cached, we currently fail to invalidate
it, which will lead to the actor painting with old contents once it
gets onto the stage.
This commit fixes the issue by changing our invalidation strategy;
previously we were looking at the widget's own theme node to determine
if it should be invalidated or not.
Now we look at the theme nodes of our cached paint states. When the
widget is mapped on stage, those are the same as the widget's own
theme node, but when the widget is not on the stage, we'll still be
able to invalidate them.
As part of this, we move the invalidation API to StThemeNodePaintState,
which is a more natural place for our use case.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/314
In X11, pointer emulated touch events are replicated with normal PRESS, RELEASE
pair events which are generated by the server. Thus for a single tap we get:
- TOUCH_BEGIN -> TOUCH_END, PRESS -> RELEASE
This will cause st-button to send two "clicked" signals, instead of just one,
breaking extensions (like dash-to-dock) that show buttons in the main stage
which will be checked two times or that will receive the same signal two times.
cogl_texture_new() is used in a few places in GNOME Shell, but
it's a deprecated Cogl function. The replacement is the less
verbose cogl_texture_2d_new_with_size(), that is very much a
straightforward replacement.
Remove the few places where this function is used, replacing
it by the CoglTexture2d counterpart.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/287
StTextureCache installs file monitors that invalidate caches when
contents of the underlying file change.
At the moment, the cache uses the Gio.FileMonitorEvent.CHANGED event
type to make that determination.
However, that is suboptimal for at least two reasons:
- while a file is being written to disk, many CHANGED events will be
emitted in sequence. That will cause needless cache invalidations,
and we will risk loading the file before it's fully loaded.
- if an existing file is replaced, e.g. with g_file_replace(), we may
not get a CHANGED event but a CREATED one instead, so the cache ends
up never getting invalidated.
The good news is that in both of those cases GFileMonitor will send a
CHANGES_DONE_HINT event after changes have settled, or after the file
is replaced.
This commit fixes both cases by switching from the CHANGED event to
CHANGES_DONE_HINT to determine that a file has in fact changed.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/286
According to Clutter documentation, "[…] actors implementing the
ClutterContainer interface should override the default implementation
of the class handler of this signal and call clutter_actor_destroy()
on their children."
StBin was doing that in GObject:dispose() instead. Move the child
destruction to a new ClutterActor:destroy() vfunc override.
StBoxLayout implements StScrollable, which, semantically, means that
the StBoxLayout size may not match the minimum size reported by the
layout manager. In this specific case, the layout manager by is a
ClutterBoxLayout by default. For example:
+--------------+
| Viewport |
+------+--------------+-----------------+
| | | |
| | | Content |
| | | |
+------+--------------+-----------------+
| |
+--------------+
So, assuming that:
- ContentSize = the minimum size of the content;
- ViewportSize = the allocated size of the viewport;
When allocating StBoxLayout, it must assume ViewportSize, but must
pass ContentSize to the layout manager. That way, the children of
StBoxLayout are correctly placed within it, even if it's bigger than
ViewportSize.
And here's the problem: right now, StBoxLayout assumes ViewportSize
AND also passes it to layout manager. Commit 77c4c6b6d specifically
exposed this bug by relying entirely on StBoxLayout to arrange the
app and window icons.
Fix that by using ViewportSize to allocate StBoxLayout itself, but
passing ContentSize to the layout manager.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/153
All adjustment setter functions take good care of avoiding emission of
notify:: when it's not needed. The set_property() implementation already
calls into the setter functions, so mark the properties as EXPLICITY_NOTIFY
in order to optimize notify:: emission away through g_object_set (rather
common from JS code).
The actor allocation doesn't change per-se, but apply_transform()
will practically transform it. In order to have the paint volume
update accordingly, queue a relayout.
The default get_paint_volume() implementation will do the union
of children, and the child ClutterText paint volume may expand
beyond StEntry size when text overflows.
We actually want all content to be clipped to the StEntry, so
implement get_paint_volume() and tell it so.
And constrain it in StScrollView instead (instead of falling back to an
infinite paint volume, as the actor as paint/pick impls, but no
corresponding get_paint_volume one).
Fixes artifacts with the AppView (and possibly other places) when paint
volumes are aggressively cached.
The default keyed_surface is meant to handle CoglTextures thus we can't
add cairo surfaces to it, as the DestroyNotify function won't handle them.
Then the quicker way is to just add another Hash table for handling
such types of textures, with proper destroy function.
This might cause a crash when cleaning up the cache as the hash table has
cogl_object_unref as DestroyNotify function but that assumes that
the passed object is a valid CoglObject.
Fixes: #210
The instance is owned by the actor (being its child), and thus when the
disposal happens for the parent the text is disposed too, thus it's just
safer to nullify its reference so that we won't try to access to invalid
objects later, and this might be the case since the JS objects could be kept
around until they aren't finalized.
https://bugzilla.gnome.org/show_bug.cgi?id=788931
Call _st_set_text_from_style() when updating the entry's style, so
that CSS style properties such as text-decoration or letter-spacing
are applied over the internal ClutterText instance.
If an actor is pending a relayout when get_allocation_box() is called,
the method forces an allocation update. In case of StWidget, this might
then result in a style update and a consecutive invalidation of the
shadow spec.
A helper method that invalidates one of its parameters as a side effect
(and by extension its return value as well) is most unexpected, so cur-
rently _st_create_shadow_pipeline_from_actor() poses an easy trap to
callers to run into.
Remove that trap by calling get_size()/get_position() instead, which
don't have the unintended side effect - it is still a good idea to fix
callers who were running into this to not waste resources on creating
shadows that are invalidated before the next paint, but throwing un-
defined behavior at them is harsh ...
https://bugzilla.gnome.org/show_bug.cgi?id=788908
The st_button_release() call wouldn't happen because StButton does not
set priv->button_mask on touch events. And if we make it called, we can't
try to unset the device grab at the end of the function, as device/sequence
are unset earlier on.
When creating a shadow for a ClutterTexture, we currently use the
underlying CoglTexture directly instead of rendering the actor to
an offscreen buffer. This assumes that the CoglTexture is directly
suitable as shadow source, which isn't necessarily the case - it
may have a very different size than what is shown and scaled up or
down by the hardware. In that case we end up with a scaled shadow
texture as well, which messes up the desired blur effect - the
result will be too light when scaling up, or too sharp when scaling
down. To fix this, only take the shortcut when a ClutterTexture's
underlying texture has the correct size and fall back to offscreen
rendering otherwise.
https://bugzilla.gnome.org/show_bug.cgi?id=788039
Unlike pango_font_description_from_string(),
pango_font_description_set_family() requires a already properly
formatted font family string. The proper format is a comma seperated
list of font families, but we generated a "comma space" separated list.
Passing a incorrectly formatted font family string to pango seems to
cause wierd issues, where the wrong font is sometimes selected.
For example, this fixes a font selection issue on zh_TW.UTF-8 locale for
chinese characters, where previously the "Droid Sans" font was selected
instead of "Source Han Sans TW" even though fontconfig had placed
"Source Han Sans TW" before "Droid Sans".
https://bugzilla.gnome.org/show_bug.cgi?id=786868
Compiling the generated source for each consumer of the dependency
means we end up trying to register the enum types multiple times,
resulting in a fatal failure on startup. Luckily code outside libst
itself only depends on the header, which doesn't cause those issues.
st_built_sources contains the source and header generated by mkenums,
not any other generated sources. Clarify that in the name, as we are
about to use source and header separately.
We cannot rely on any build order, except the one we specify ourselves.
St depends on various generated files; other targets depend on those
files existing, so they can be included. There is no direct relationship
between targets and files, unless we declare a dependency, using the
Meson declare_dependency() constructor — which allows us to replace the
various `link_with` directives with the more appropriate `dependencies`
one, and also allows us to specify sources that must exist by the time
we build those targets.
In parallel builds we may end up with st-enum-types.c being built inside
separate targets outside of src/st which may not have the ST_COMPILATION
pre-processor symbol defined. For this reason, we need to define it
ourselves in the source file, before including other headers, to avoid
the single-include guard.
Meson is on track to replace autotools as the build system of choice,
so support it in addition to autotools. If all goes well, we'll
eventually be able to drop the latter ...
https://bugzilla.gnome.org/show_bug.cgi?id=783229
Even though the API documentation doesn't say so, the underlying
Cogl texture of a ClutterTexture may be unset, so check for that
case to avoid a runtime warning.
https://bugzilla.gnome.org/show_bug.cgi?id=784353
This allows a full ClutterActor to be used as hint in the entry, instead
of a simple string.
The string case has been now re-implemented on top of the hint actor.
https://bugzilla.gnome.org/show_bug.cgi?id=783484
This is the same as the previous commit, but for StEntry.
We don't have any need to explicitly destroy this actor in our dispose
implementation, and doing so breaks the assumption that we can access
the clutter_text from within destroy.
https://bugzilla.gnome.org/show_bug.cgi?id=783483
There's no need to explicitly destroy the ClutterText actor inside the
label; doing so is actually harmful, as it will break the normal
reference cycle between container and children.
As StLabel doesn't hold any extra reference to the ClutterText actor and
just uses clutter_actor_add_actor() to add it to itself, let the normal
container dispose cycle run to dispose of the reference.
https://bugzilla.gnome.org/show_bug.cgi?id=783483
Commit ffe4eaf00d broke the handler by fetching the instance private
from the wrong actor - as we don't use the ::primary-icon-clicked signal,
and the ::secondary-icon-clicked signal still works by accident, nobody
noticed until now ...
https://bugzilla.gnome.org/show_bug.cgi?id=782190
When extracting the sliced image, the GTask grants data ownership on
g_task_propagate_*, so the pixbuf list must be properly freed. On async
load, we just left a dangling reference when returning on the async
task.
https://bugzilla.gnome.org/show_bug.cgi?id=642652
st_theme_node_get_border_image() may return %NULL, leading to a
segfault in st_border_image_get_file() when glib is compiled with
G_DISABLE_CHECKS.
https://bugzilla.gnome.org/show_bug.cgi?id=780381
It isn't useful to move the keyboard focus to a hidden actor, so
only include visible actors in the focus chain - this is in fact
the documented behavior of st_widget_get_focus_chain(), so having
the default implementation return all children has always been
unexpected.
https://bugzilla.gnome.org/show_bug.cgi?id=778158
Sliced images are loaded into a group actor with one child actor
per slice. In case loading the image fails, we currently quietly
return the empty group actor, which makes diagnosing problems
unnecessarily hard - just be a bit more verbose on failure.
https://bugzilla.gnome.org/show_bug.cgi?id=774805
Other windows like the mutter Xwayland selection bridges might deal with
the clipboard, which would result in events visible on st-clipboard event
filters.
In order to avoid unintended results, ignore events that are not meant for
the clipboard window.
https://bugzilla.gnome.org/show_bug.cgi?id=760745
We're using an unitialized box resulting in an undefined shadow box
size.
_st_paint_shadow_with_opacity() already computes the shadow's bounding
box from the source actor's box so we just need to pass that along.
https://bugzilla.gnome.org/show_bug.cgi?id=767954
on_custom_stylesheet_changed() would set properties_computed to FALSE
without freeing the old properties, then the properties pointer would
be overwritten in ensure_properties().
https://bugzilla.gnome.org/show_bug.cgi?id=710230
Checking offscreen for COGL_INVALID_HANDLE is not sufficient,
as cogl_offscreen_new_with_texture doesn't initialize framebuffer
objects but lets Cogl solve this the lazy way.
cogl_offscreen_new_with_texture will never return COGL_INVALID_HANDLE
anyways.
https://bugzilla.gnome.org/show_bug.cgi?id=764898
For shortcuts that involve a letter (like <ctrl>c), we currently only
accept the lower-case variant. This makes shortcuts awkward to use when
caps-lock is active, and is inconsistent with GTK+, so accept upper-case
variants as well.
https://bugzilla.gnome.org/show_bug.cgi?id=766325
While CoglError is a define to GError, it doesn't follow the convention
of ignoring errors when NULL is passed, but rather treats the error as
fatal :-(
That's clearly unwanted for a compositor, so make sure to always pass
an error parameter where a runtime error is possible
https://bugzilla.gnome.org/show_bug.cgi?id=765061
If cogl_framebuffer_allocate fails in _st_create_shadow_pipeline_from_actor, the
CoglOffscreen* that was allocated earlier in the function is leaked.
https://bugzilla.gnome.org/show_bug.cgi?id=735705
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
This never worked since the code landed but apparently no-one noticed
until now.
The intent here is to return the accessible's default role if none has
been explicitly set on the StWidget instance.
https://bugzilla.gnome.org/show_bug.cgi?id=760945
Commit ffe4eaf00d changed this code to
call st_widget_get_accessible_role() instead of using the value
directly which would be an infinite recursion if that function didn't
have a bug. As it is, this just resulted in
CRITICAL **: atk_object_get_role: assertion 'ATK_IS_OBJECT
(accessible)' failed
https://bugzilla.gnome.org/show_bug.cgi?id=760945
Since commit 48a54e8ac4, paint() has an explicit framebuffer parameter,
however a couple of submethods are still using the draw framebuffer,
which breaks when rendering to an offscreen buffer.
If we are trying to render a shadow at a size that is very large in one
direction, but small in the other direction (so that we don't 9-slice
the texture), then allocating the backing texture for the offscreen
buffer may fail due to texture-size limits. Don't crash in that case.
https://bugzilla.gnome.org/show_bug.cgi?id=757150
There are quite a few crashes in retrace.fedoraproject.org that are a result of
of cairo_pattern_get_surface() failing, then a subsequent call to
cairo_image_surface_get_width() crashing because no surface was returned to the
out parameter. Knowing what causes these is hard - my best guess is widgets getting
allocated at ridiculous sizes - but avoiding the crash makes sense in any case.
See https://bugzilla.redhat.com/show_bug.cgi?id=1206754https://bugzilla.gnome.org/show_bug.cgi?id=756983
Cut down on boilerplate by using the (no longer that) new helper
macros. We don't care about breaking ABI in private libraries, so
use G_DECLARE_FINAL_TYPE even where the class struct used to be
exposed in the header, except for types we inherit from ourselves
(obviously) or where the class exposes any vfuncs (where changes
could affect inheritance in extensions).
They are unused, as we don't use them ourselves and the class is not
exposed to introspection. Drop them to allow defining the type as final
in an upcoming commit.
There is nothing preventing callers from replacing the internal
layout manager, and as long as the replacement is a (or derives
from) ClutterBoxLayout, everything should work fine except for
losing a bit of automatic property mapping - and the latter is
easily fixable by moving the setup out of the constructor.
https://bugzilla.gnome.org/show_bug.cgi?id=708472
Since commit 4f1f226828 we only consider buttons clicked when the
release event had a corresponding press event. However as we use
the hover state to check whether a release event actually occurred
on the button, we dismiss any clicks in cases where we missed the
enter event - most likely due to some other actor holding a grab.
Instead, check whether the button contains the event's source, which
should be less error-prone.
https://bugzilla.gnome.org/show_bug.cgi?id=748919
GObject-Introspection started warning for wrong annotations, and
StGenericAccessible::set-current-value has a return value annotation
even if it returns nothing. This generates the warning:
src/st/st-generic-accessible.c:146: Warning: St:
StGenericAccessible::set-current-value: invalid return annotation
Which, coupled with fatal warnings, breaks the Shell build.
We currently don't have any code either in gnome-shell or
gnome-shell-extensions setting margins directly with the Clutter API.
On the other hand, the current behavior doesn't allow us to remove a
style class with margins and have that be reflected, so removing this
special casing seems like the right thing to do at this point.
https://bugzilla.gnome.org/show_bug.cgi?id=746902
If users click outside the search entry while it's empty we reset and
thus give up key focus. This means that when using an input method
with candidate popups, interacting with the popup with a mouse click
cancels the current input method context if there's no other text in
the entry besides the preedit string.
To avoid this we can check if the entry has preedit in addition to
checking if it has normal text.
https://bugzilla.gnome.org/show_bug.cgi?id=745167
Commit 1c1f63a7d7 changed the shadow
pipeline to use cogl_framebuffer_ortographic() instead of cogl_ortho(),
but the two functions take their arguments in a different order.
Fixes graphical corruption for text shadows in the login screen.
https://bugzilla.gnome.org/show_bug.cgi?id=745061
