There is no need to expose it since it can be accessed by passing
non-axis aligned quads. Move existing tests to the quad clipper.
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
The added complexity is unnecessary, it is limited to polygons of
length less than or equal to 8, there is currently no use for that
feature nor any plans to use it and tests are non-existent.
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
The non-zero area check of clipper_quad_clip() is incorrect for quads
initialized with a polygon starting with a vertical edge. In order to
handle polygons starting with an horizontal edge and polygons starting
with a vertical one, it must check opposite vertices for equality.
The test previously described as "Box intersects entire smaller
aligned quad" is now described as "Clockwise winding and top/left
initial vertex". This test keeps the same values as before but all
combinations of winding order and first edge orientations are
also tested. The QUAD() macro isn't used anymore to do so.
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
Add quad clipping tests checking intersections at all edges and
corners of axis-aligned and unaligned quads with negative and positive
values.
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
Simplify box and quad declarations using dedicated macros.
Hard-coded literals are used instead of preprocessor constants for the
sake of brevity and because, as several new tests will be added, it
appears to be easier to understand those when values are inlined.
Descriptions have been revised to better understand the intent of each
test. Previous descriptions used a coord system with Y pointing up,
new descriptions use Y pointing down in order to improve consistency
with the rest of the code base and to have a common ground when
talking about winding order.
All the tests keep the same input values with the exception of the
last 2 tests with (new) descriptions: "Rotated quad with edges
adjacent to box corners" and "Rotated quad with edges cutting out box
corners". These tests had a different winding order and have been
modified so that all tests use a clockwise order (new axis
convention). The last test also gets a counter-clockwise version in
order to ensure the opposite winding order is correctly supported too.
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
When the first vertex passed to the clipper is clipped into two
vertices, the second vertex can sometimes be emitted as the first
clipped vertices while the first vertex is emitted as the last one. A
new utility function assert_vertices() is added to handle that
case. The function also checks the number of clipped vertices and the
clipped vertices in one go.
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
Simplify clip_transformed() by replacing its context parameter with a
clipping box parameter. The context struct is still used internally to
pass data around.
Since clip_transformed() doesn't take a context anymore, the clipping
boxes are now declared per test and stored along with the other vertex
data. That prepares the ground to add new tests using different boxes.
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
Carry on the common vertex representation front by making boxes use
the clip_vertex struct.
A new function clip_quad_box32() is added to clearly separate the main
function taking a clip_vertex struct from the utility function taking
a pixman_box32 struct.
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
Pass a clip_vertex struct and a size to clip_transformed() instead of
a polygon8 struct to simplify the clipper API by sticking to a common
vertex representation.
Simmplify vertex-clip test since clip_transformed() now works on a
copy of the polygon (commit edd5d1cc09).
Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
Move vertex clipper back to single-precision floating point
intermediates. Since positions are sent down the graphics hardware as
single-precision values, this prevents useless conversions between
single and double precision values and lets compilers fit twice as
much data into vector registers. It also removes a copy by letting the
clipper store vertices directly into the vertex buffer.
This is mostly reverting the conversion to double-precision that
happened along with the switch to the weston_coord struct for vertex
coordinates (commit 10e70bf23c).
Signed-off-by: Loïc Molinari <loic.molinari@gmail.com>
Remove the independent x, y floats from the clipping code and replace them
with struct weston_cord. This includes the polygon8 structure as well.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
In "backend-drm: simplify compile time array copy", ARRAY_COPY was
introduced to be used by the DRM-backend.
In this patch we expand its usage to other code where hardcoded arrays
are being copied.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
This clarifies what is supposed to be the libweston code.
v2: screen-share.c is already in compositor/ instead.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Tested-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Tested-by: Benoit Gschwind <gschwind@gnu-log.net>
Acked-by: Benoit Gschwind <gschwind@gnu-log.net>
[Pekka: rebased]
To help reduce code duplication and also 'kitchen-sink' includes
the ARRAY_LENGTH macro was moved to a stand-alone file and
referenced from the sources consuming it. Other macros will be
added in subsequent passes.
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Using the parent '../' path component in #include statements makes
the codebase more rigid and is redundant due to proper -I use.
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Mostly remove headers that aren't actually needed for anything.
Add stdint.h to permit dropping xf86drm.h, which is otherwise unneeded.
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Acked-by: Marek Chalupa <mchqwerty@gmail.com>
Tested-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
There was an issue recently in screen-share.c where config.h was not
being included, resulting in the wrong definition for off_t being used on
32 bit systems. I checked and I don't think this problem is happening
elsewhere, but to help avoid this sort of problem in the future, I went
through and made sure that config.h is included first whenever system
headers are included.
The config.h header should be included before any system headers, failing
to do this can result in the wrong type sizes being defined on certain
systems, e.g. off_t from sys/types.h
Signed-off-by: Andrew Wedgbury <andrew.wedgbury@realvnc.com>
This tests (via the table-driven testing method) that the correct
number of vertices and also the correct vertices themselves
are generated for an clip box and polygon of up to eight vertices.
Also add a libshared-test.la so that we don't have to build weston-test-runner
all the time
