Commit graph

4529 commits

Author SHA1 Message Date
Pekka Paalanen 49f6d62e9d shared: fail reading a directory as a config file
open() will happily open directories and other non-normal files.
Attempting to parse them as config files makes no sense, so check that
the opened file is indeed a regular file.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Jonny Lamb <jonny.lamb@collabora.co.uk>
Reviewed-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-27 09:38:02 +02:00
Pekka Paalanen fb7069ee05 tests: use MODDIR in weston-tests-env
Make a little short-hand for the module directory.

This also cleans up the redefinition of BACKEND in the script.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Jonny Lamb <jonny.lamb@collabora.co.uk>
Reviewed-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-27 09:37:56 +02:00
Pekka Paalanen 17a1a966c2 compositor: postpone unhandled option check
Move the code that checks for unhandled command line options only after
all the module loading. We pass argc, argv to all module loaders, so
modules might want to have command line options, but you cannot use them
if the check is too early.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Jonny Lamb <jonny.lamb@collabora.co.uk>
Reviewed-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-27 09:37:15 +02:00
Derek Foreman a5855adace pixman-renderer: use pre-computed inverse output matrix
We've already computer the inverse of the output matrix, so we
don't need to calculate it again here.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <b.harrington@samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-27 09:17:26 +02:00
Derek Foreman 7cb916e285 zoom: fix zoom
Right now zoom only works on the output at 0, 0 because it's adding
the output corner co-ordinates to global co-ordinates that already
include the output offset.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <b.harrington@samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-27 09:17:16 +02:00
Derek Foreman 67a18b9942 compositor: fix weston_output_transform_coordinate
weston_output_transform_coordinate() was supposed to convert from device
co-ordinates to global co-ordinates.

Commit 0f67941c broke that by converting from global to device instead,
which just magically works ok for single untransformed outputs (where the
transformation is identity)

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <b.harrington@samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-27 09:17:08 +02:00
Derek Foreman c002321cd6 compositor: Create the inverse of the output matrix
Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <b.harrington@samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-27 09:16:41 +02:00
Jasper St. Pierre d19e9b0e42 xwayland: Correct input for undecorated clients
We were correctly handling decorated and fullscreen clients, but left
uninitialized values in the input region for undecorated clients. Fix
this behavi-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-27 08:57:00 +02:00
Derek Foreman 4e53c53fe7 input: Don't recreate the cursor sprite when only the hotspot changes
Currently we unmap and re-map the cursor when the hotspot changes which
causes spurious enter/leave events.

This changes the pointer_set_cursor() logic to avoid this.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 10:15:48 +02:00
Jonny Lamb abff883d2c platform: rename create_egl_window to create_egl_surface
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:49 +02:00
Jonny Lamb 759fbf4d0f platform: remove global variables
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:49 +02:00
Jonny Lamb 0e2ab36df7 platform: provide platform_base fallbacks and remove ifdefs
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:49 +02:00
Jonny Lamb 5c332900f7 nested-client: include platform.h
Missed because buliding nested clients requires cairo-glesv2.

Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:49 +02:00
Jonny Lamb f1ec506048 gl-renderer: provide platform_base fallbacks and remove ifdefs
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:49 +02:00
Jonny Lamb 74eed31108 gl-renderer: call supports() automatically in create()
This means compositors don't need to call supports() manually and
create() will just return -1 in the failure case as before. This also
means we can deal with the case of eglGetProcAddress returning
non-NULL but not actually being available at runtime.

Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:49 +02:00
Jonny Lamb ace6920912 compositor-{drm, wayland, x11}: remove useless tests for ->supports
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:48 +02:00
Jonny Lamb a3e6a4a87a gl-renderer: move all EGL_PLATFORM_* defines here
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:48 +02:00
Jonny Lamb 445fb697a5 gl-renderer: fix build with --disable-egl
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:48 +02:00
Jonny Lamb 62185f42ea compositor-{drm, x11, wayland}: stop including EGL headers here
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-26 09:54:48 +02:00
Pekka Paalanen 41d2ccccb0 man: update weston's shells
Tablet shell is long gone. Might as well list what we have now.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-20 14:01:02 -07:00
Jonny Lamb 4bdcb5732b clients & tests: use eglCreatePlatformWindowSurfaceEXT when supported
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-20 13:57:24 -07:00
Jonny Lamb 671148f064 gl-renderer: use eglCreatePlatformWindowSurfaceEXT to get EGLSurfaces
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-20 13:57:14 -07:00
Jonny Lamb 51a7ae5f89 clients & tests: use eglGetPlatformDisplayEXT when supported
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-20 13:56:38 -07:00
Jonny Lamb 70eba3fbde gl-renderer: use eglGetPlatformDisplayEXT to get an EGLDisplay
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-20 13:55:46 -07:00
Pekka Paalanen 111c6f9bb7 compositor: fix return code from main()
There were a few cases of 'goto out' in main() that did not set ret to
EXIT_FAILURE. Shell failing to init is the one I hit when writing tests
for ivi-shell.

Rather than adding a few more 'ret = EXIT_FAILURE', make that the
default and remove the redundant assignments. When Weston exits
properly ec->exit_code will take care of the exit code.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Emilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>
2015-03-20 15:55:57 +02:00
Pekka Paalanen 8fd4de458e compositor: warn about insane repaint delay
Make the sanity check more explicit and log a warning if it happens.

Small negative values are ok because it just means the compositor is
lagging behind, or more likely the user specified a too long repaint
window.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <b.harrington@samsung.com>
2015-03-20 12:19:33 +02:00
Pekka Paalanen 0513a95a06 compositor: add repaint delay timer
This timer delays the output_repaint towards the end of the refresh
period, reducing the time from repaint to present.

The length of the repaint window can be set in weston.ini.

The call to weston_output_schedule_repaint_reset() is delayed by one
more period.  If we exit the continuous repaint loop (set
output->repaint_scheduled to false) in finish_frame, we may call
start_repaint_loop() unnecessarily.  The problem case was actually
observed with two outputs on the DRM backend at 60 Hz, and 7 ms
repaint-window. During a window move, one output was constantly falling
off the continuous repaint loop and introducing additional one frame
latency, leading to jerky window motion. This code now avoids the
problem.

Changes in v2:

- Rename repaint_delay_timer to repaint_timer and
output_repaint_delay_handler to output_repaint_timer_handler.

- When computing the delay, take the current time into account. The timer
uses a relative timeout, so we have to subtract any time already gone.

Note, that 'gone' may also be negative. DRM has a habit of predicting
the page flip timestamp so it may be still in the future when we get the
completion event.

- Do also a sanity check 'msec > 1000'. In the unlikely case that
something fails to provide a good timestamp, never delay for more than
one second.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-20 12:19:29 +02:00
Pekka Paalanen 662f384e6a compositor, backends: weston_compositor_read_presentation_clock
Create a new function weston_compositor_read_presentation_clock() to
wrap the clock_gettime() call for the Presentation clock.

Reading the presentation clock is never supposed to fail, but if it
does, this will notify about it. I have not seen it fail yet, though.

This prepares for new testing features in the future that might allow
controlling the presentation clock. Right now it is just a convenience
function for clock_gettime().

All presentation clock readers are converted to call this new function
except rpi-backend's rpi_flippipe_update_complete(), because it gets its
clock id via a thread-safe mechanism. There shouldn't be anything really
thread-unsafe in weston_compositor_read_presentation_clock() at the
moment, but might be in the future, and weston core is not expected to
need to be thread-safe.

This is based on the original patch by
Cc: Derek Foreman <derekf@osg.samsung.com>

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-20 12:19:29 +02:00
Jonas Ådahl b407024ea1 input: Make setting the same pointer cursor state again a no-op
If the client calls wl_pointer.set_cursor with the same surface and hot
spot coordinate that is already set, don't do anything as no state was
changed.

This avoids an issue where a client setting the same cursor surface
multiple times would receive wl_surface.leave/enter on that surface
every time.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
2015-03-20 11:58:30 +08:00
Bryce Harrington a86c3ee697 Spellcheck fixes
./ivi-shell/README:19: protocal  ==> protocol
./src/compositor.h:596: seperate  ==> separate
./src/version.h.in:33: actualy  ==> actually
./src/cms-helper.h:44: embeded  ==> embedded
./protocol/fullscreen-shell.xml:65: seperate  ==> separate
./protocol/xdg-shell.xml:150: auxilliary  ==> auxiliary
./clients/window.c:1035: preferrably  ==> preferably

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-19 17:02:08 +02:00
Marek Chalupa a413ff897d tests: use two roundtrips for global events
first is for getting and binding to globals and the other one is for
getting wl_shm.formats that are emitted after binding
to wl_shm

Signed-off-by: Marek Chalupa <mchqwerty@gmail.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-19 16:17:20 +02:00
Derek Foreman 70ac0edcab desktop-shell: don't allow negative values in drag resize
Now clamping width and height to a minimum of 1, 1 when drag resizing.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jasper St. Pierre <jstpierre@mecheye.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2015-03-18 10:34:18 -07:00
Derek Foreman 561662ba02 compositor-fbdev: fix output transformations
The pixman-renderer is already performing transformations when compositing
into the shadow buffer, we just need to get the damage co-ordinates right
when copying from shadow to front.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Tested-by: Thilo Cestonaro <thilo@cestona.ro>
2015-03-18 16:26:12 +02:00
Derek Foreman 44ed70b469 compositor-fbdev: allow configuring transform in the ini file
Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Tested-by: Thilo Cestonaro <thilo@cestona.ro>
2015-03-18 16:26:01 +02:00
Derek Foreman 8f1b32f7d0 compositor-rpi: give the output a name
Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-18 16:05:32 +02:00
Derek Foreman f3723d911f input: don't assume outputs have names
If an output is unnamed and devices are in seats, the strcmp will crash.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-18 16:05:14 +02:00
Derek Foreman e516c3bb80 compositor-fbdev: give the output a name
If you have devices configured in seats with udev then the output names
are tested with string compare.  This fixes a potential crash on startup and
device insertion.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2015-03-18 16:04:43 +02:00
Pekka Paalanen c93782ad33 pixman-renderer: implement view scissor
Only needed in the source-clipped case, otherwise the boundingbox is
already doing the necessary clipping.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 13:38:28 +02:00
Pekka Paalanen d7ca6b0bbe pixman-renderer: implement source clipping
Implement a way to do composition clipping with a region32 given in
source image space.

Pixman does not directly support this kind of operation at all. If you
pixman_image_set_clip_region32() on a source image, it will be ignored
unless you also
	pixman_image_set_source_clipping(image, 1);
	pixman_image_set_has_client_clip(image, 1);
but then it takes the region from source image and still uses it in the
destination coordinate space. For reference:
http://lists.freedesktop.org/archives/pixman/2015-March/003501.html
That is actually the intended behaviour in Pixman.

This patch implements source clipping by taking each rectangle of the
source clip region, wrapping that sub-rect of the source image in a new
pixman_image_t, and compositing it separately. This might be very heavy as
we are painting the whole damage the number of rectangles times, but
practically always the number of rectangles is one.

An alternative solution would be to use mask images of type PIXMAN_a1,
render the source clip region in it, and set the transformation. You'd
probably also want to cache those images. And because we use the mask to
apply view->alpha, you'd have to use PIXMAN_a8 in those cases.

v2: Fix a comment.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 13:38:28 +02:00
Pekka Paalanen ccf99ce11a pixman-renderer: move code to draw_view_translated()
Move code from draw_view() into a new function draw_view_translated().
This new function is correct only if
view_transformation_is_translation().

The test for view->alpha is moved into draw_view_translated() too, so we
don't need to pass the pixman_op from draw_view(). The non-translation
path is already using PIXMAN_OP_OVER, so it does not care about the
alpha.

v2: Fixed commit message.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 13:38:28 +02:00
Pekka Paalanen 11af0d9ea7 pixman-renderer: change repaint_region() arguments
Change the region argument types in repaint_region(), moving the
final_region computation to the caller. The caller is in a better
position deciding if source clipping is needed or if it can be intersected
into the final_region via a simple translation. This avoids
surf_region or source clip implying that the transformation is only a
translation.

The region_global_to_output() call is also moved into the callers so
that repaint_region() would not modify caller-provided data. Modifying
caller provided data could be surprising.

This patch does not change the rendering output.

v2: Remove unused source_clip argument.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 13:38:28 +02:00
Pekka Paalanen f75b6bbfec pixman-renderer: refactor into region_intersect_only_translation()
Move code into a new helper function. No changes.

v3: Add assert, and reorder this patch with adding
view_transformation_is_translation().

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 13:38:12 +02:00
Pekka Paalanen 23d4af5969 pixman-renderer: add view_transformation_is_translation()
A simple refactoring just to help readability.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 12:27:37 +02:00
Pekka Paalanen 6ea523b85d pixman-renderer: refactor transformation computation
Move the code computing the end-to-end transformation from
repaint_region() into a new function
pixman_renderer_compute_transform().

The code itself is not modified.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 12:27:25 +02:00
Pekka Paalanen e54e31c84c compositor: add weston_surface_to_buffer_region()
This will be used by pixman-renderer.

v2: Fix doc typo.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 12:27:12 +02:00
Jason Ekstrand 8870a23fbd pixman-renderer: simplify the output-to-buffer matrix computation
Now that we have a buffer-to-surface matrix and the global-to-output matrix
is in pixels, we can remove a large chunk of confusing code from the pixman
renderer.  Hopefully, having this stuff in weston core will keep the pixman
renderer from gettin broken quite as often.

This patch makes attempting zoom on the pixman-renderer render funny
stuff. We didn't support zoom before, now it renders wrong instead of
not zooming at all.

[Pekka: adjust commit message]
Tested-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 12:26:53 +02:00
Jason Ekstrand 1e05904cd3 compositor: Add surface-to-buffer and buffer-to-surface matrices
Add matrix representations of these two transformations. Future patches
will leverage these to simplify the coordinate transformation code.

[Pekka: commit message]
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 12:26:45 +02:00
Derek Foreman 0f67941c2f compositor: use weston_matrix_transform for weston_output_transform_coordinate
We can greatly simplify weston_output_transform_coordinate now by simply
multiplying by the output matrix and converting the result to fixed point.

This patch fixes zoomed input behaviour on the nested backends (x11,
wayland) which use absolute input coordinates. And probably also
absolute input devices. The patch that broke this was "zoom: Use pixels
instead of GL coordinates".

Signed-off-By: Derek Foreman <derekf@osg.samsung.com>
[Pekka: adjusted coding style and message]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 12:26:22 +02:00
Pekka Paalanen c143df1abd rpi-renderer: minimal fix to zoom coordinates
The patch "zoom: Use pixels instead of GL coordinates" changed the
meaning of weston_output_zoom::trans_x,trans_y from GL coordinate system
to global coordinates.

This patch is a minimal untested change to the rpi-renderer to try and
follow up on that change.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 12:26:06 +02:00
Jason Ekstrand 87535e24c2 zoom: Use pixels instead of GL coordinates
Previously, the zoom functions used GL coordinates natively which doesn't
work with the new output matrix calculations.  This changes zoom to work in
pixel coordinates to match the new output matrix format.  This also cleans
up the math in the zoom code substantially.

This patch changes the meaning of weston_output_zoom::trans_x,trans_y,
and doing so probably breaks zoom on the rpi-renderer and all absolute
input devices. These problems are fixed by the following patches:

	rpi-renderer: minimal fix to zoom coordinates
	compositor: use weston_matrix_transform for
		weston_output_transform_coordinate

[Pekka: added a comment]
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2015-03-11 12:25:55 +02:00