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76 Commits

Author SHA1 Message Date
Matthias Clasen
865564b32f gsk: Make matrix transforms roundtrip better 
When we parse a 2D matrix, we produce a 2D transform, and we
can easily regenerate a 2D matrix from it.

Tests included.
 2024-02-11 19:39:19 -05:00
Sergey Bugaev
d07a6b8566 snapshot, gsktransform: Mention that rotation happens around (0, 0) 
...and not around the center of the render node, as one could expect
given that the render node syntax for rotation, transform: rotate(90);,
happens to match the CSS syntax for the same thing, and CSS does rotate
around the center by default.

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
 2023-08-25 15:54:05 +03:00
Sebastian Dröge
c44badd26a Mark various GskTransform functions as nullable in their return value 
Various transforms are normalized with their next transform, and if they
end up being the identity transform will return NULL.

For example a translation by (x,y,z) and followed by (-x,-y,-z) will
result in NULL.
 2022-01-14 11:57:23 +02:00
Benjamin Otte
c97a758aa7 cssparser: Remove unused argument 
The base_directory argument is never used. So don't have it.
 2021-10-28 03:19:08 +02:00
Matthias Clasen
41b810da7f Add gsk_transform_to_2d_components 
This function decomposes a general 2D transform
into skew, scale, rotation and translation.

Tests included.
 2021-09-18 02:06:51 -04:00
Matthias Clasen
1289e68931 gsk: Add skew transforms 
Add gsk_transform_skew() to make our transform
api more complete wrt to what you would expect
for a graphics api.
 2021-09-17 22:07:26 -04:00
Matthias Clasen
9e6adaa913 transform: Add sections 
This makes the code easier to navigate (for me).
 2021-09-17 22:07:26 -04:00
Matthias Clasen
bef54a382d transform: Improve docs 
Add an example for reconstructing transforms.
 2021-09-17 10:28:49 -04:00
Matthias Clasen
0ef12193f9 gsk: Optimize gsk_transform_to... 
Optimize these functions for the common cases.
 2021-07-24 18:48:10 -04:00
Matthias Clasen
2d266d107b gsk: Clean up docs syntax 
Replace leftover gtk-doc syntax (#Type) with backquotes.
 2021-05-22 17:25:26 -04:00
Matthias Clasen
4a0d3d7acc docs: Reduce redundancy 
Remove a boatload of "or %NULL" from nullable parameters
and return values. gi-docgen generates suitable text from
the annotation that we don't need to duplicate.

This adds a few missing nullable annotations too.
 2021-05-20 20:45:06 -04:00
Matthias Clasen
7fe0610b68 introspection: Stop using allow-none 
allow-none has been deprecated for a long time
already. Instead use optional and nullable everywhere.
 2021-05-20 19:17:49 -04:00
Matthias Clasen
8ba16eb4f1 Documentation fixes 
Mostly fixing up indentation of continuation lines,
and other small cleanups.
 2021-05-20 19:17:49 -04:00
Matthias Clasen
7450427757 gsktransform: Convert docs 2021-03-11 16:37:32 +00:00
Matthias Clasen
ca3120919f docs: Improve gsk docs 
Convert link formats, add summaries, and make
a few missing things show up in the docs.
 2021-03-11 16:37:31 +00:00
Christian Hergert
6fab195643 gsk: move transform structure to private.h 
This allows using the category without having to call a function from the
hot paths of the renderer.
 2021-02-10 16:14:59 -08:00
Timm Bäder
fdda4e4e99 GskTransform: Add nullable annotations to _equals() 
Both can be NULL here.
 2020-12-21 10:26:03 +01:00
Timm Bäder
186287ecfb GskTransform: Fix identity transform class name 2020-12-21 10:26:02 +01:00
Timm Bäder
bd5d1615ac GskTransform: Avoid a ref+unref pair 
If gsk_transform_is_identity() returned FALSE for the next transform,
the previous code did a ref + unref pair, even though it was unneeded.
 2020-12-21 10:26:02 +01:00
Sophie Herold
cd0bef9390 Add some missing nullable return annotations 2020-10-17 15:32:36 +02:00
Matthias Clasen
431f144f37 gsk: Normalize when transforming bounds 
Bounds are assumed to be normalized, and transforms
with negative scales or 3d rotations can make us get
negative sizes.

Fix by Benjamin Otte.
 2020-09-28 11:34:16 -04:00
Matthias Clasen
41497aeb8b Add gsk_matrix_transform_rect 
This is a projecting version of the corresponding
graphene api. While we are at it, rewrite
gsk_matrix_transform_bounds() to use
gsk_matrix_transform_rect().
 2020-09-04 13:15:21 -04:00
Matthias Clasen
e36b594867 Replace uses of graphene_matrix_transform_ 
Replace our uses of graphene_matrix_transform_point,
_point3d and _bounds by our own versions that handle
projective transforms correctly.

This fixes render node bounds being incorrect for widgets
involving projective transforms (e.g. testrevealer swing
transformations), and also fixes picking on such widgets.
 2020-09-01 09:18:38 -04:00
Matthias Clasen
99a7a2188a gsk: Add some private transform apis 
Some of the graphene_matrix_transform apis don't work
correctly with projective matrices, so add our own
variants.
 2020-09-01 09:18:38 -04:00
Björn Daase
6315cd977c *: Fix spelling mistakes found by codespell 2020-08-21 15:29:34 +02:00
Timm Bäder
fa85ec5cf5 GskTransform: Restructure _to_affine and _to_translation 
Make the simple cases more explicit.
 2020-07-28 05:34:12 +02:00
Timm Bäder
756b84033a GskTransform: Remove unused function from private header 
We only use this in gsktransform.c
 2020-07-28 05:34:12 +02:00
Matthias Clasen
13b37b0ba4 gsk: Fix a transform leak 
This was found by running our testsuite under asan.
 2020-07-08 17:44:08 -04:00
Timm Bäder
da85815399 transform: Fix docs to use "transform" instead of "matrix" 2020-06-19 05:26:25 +02:00
Timm Bäder
5dde4c0a39 transform: Fix equal() docs 
This has nothing to do with matrices.
 2020-06-19 05:26:25 +02:00
Timm Bäder
0c1cfbbad1 transform: Compare 3d points directly 2020-06-19 05:26:24 +02:00
Timm Bäder
a974c83423 gsktransform: Make next == NULL case explicit 
This is handled with the is_identity() check as well but this way it's
much more obvious what's happening
 2020-06-19 05:26:24 +02:00
Benjamin Otte
7597f6b594 transform: Don't crash for gsk_transform_transform (id, id) 
See attached tests
 2020-02-21 18:30:13 +01:00
Benjamin Otte
b50093d044 transform: Make sure the identity transform is equal to NULL 2020-02-21 18:25:05 +01:00
Benjamin Otte
41ef6e9fa5 transform: Add optimization for common case 
Transforming identity by an other transform does not mean we need to
painstakingly apply the individual steps of other to construct a new
transform, it means we can just return other.

Or in math terms:
  I * B = B
so just return B.
 2020-02-21 18:19:16 +01:00
Alexander Larsson
1f0438e7fe gsk: Fix angle normalization 
I was getting assertions that normalize_angle() failed the
result < 260 check. Doing some research on this it turns out
to be a precision issue. If the incomming angle is very slightly
below zero, then adding 360 to it may end up with exactly 360.

I simplified the code a bit to avoid division and rounding, because in
practice most angles will be "just outside" the 0-360 degree anyway.
And i also added a workaround for the "result is 360" case by just
setting it to 0.
 2020-02-11 13:51:06 +01:00
Timm Bäder
8388791f87 GskTransform: Remove useless fmod check 
All angles are in the [0; 360[ range
 2020-02-07 13:16:32 -05:00
Timm Bäder
cbb05a3eab GskTransform: add assertions to make normalize_angle() intentions clear 
360deg should be expressed as 0deg and no angle should ever be
negative.
 2020-02-07 13:16:32 -05:00
Timm Bäder
cff8304133 GskTransform: Add gsk_transform_transform_point() 
Equivalent of gsk_transform_transform_bounds() and
graphene_matrix_transform_point() respectively.
 2020-01-24 06:19:12 +01:00
Chun-wei Fan
a9b1d4a389 build: Check for sincosf() 
sincosf() is really a GCC-specific function that may more may not be
supported on non-GCC compilers, so we want to check for it, otherwise we
use a fallback implementation, not unlike the one in
demos/gtk-demo/gtkgears.c.
 2020-01-08 17:15:29 +08:00
Timm Bäder
7669e6e42e transform: Properly compare scale transforms 
If the epsilon we use there is too much, we can run into rendering
errors because the GPU will use the actual scale value.
 2020-01-07 17:27:19 +01:00
Timm Bäder
7a27122dab transform: Scale+translate bounds directyl 
Make these two code paths look the same.
 2020-01-07 17:27:18 +01:00
Timm Bäder
ca4ae81170 transform: Compare class before ->next 2020-01-07 17:27:18 +01:00
Timm Bäder
766d4dff76 GskTransform: Compute sin/deg of 90deg rotations manually 
Otherwise we might end up with inaccuracies, e.g. when
gsk_transform_transform_bounds()'ing bounds.
 2020-01-07 17:27:17 +01:00
Timm Bäder
e62f135c6a GskTransform: Normalize angles 
Make sure all angles are in the [0..365) range
 2020-01-07 17:27:17 +01:00
Timm Bäder
6c90d3a1b6 gsktransform: Fix documentation comment 
There is no @m.
 2019-09-09 17:36:23 +02:00
Rico Tzschichholz
5504c62af9 gsk: Add missing 'transfer full' annotations of instance parameters 
Fixes https://gitlab.gnome.org/GNOME/gtk/issues/2107
 2019-08-26 18:05:17 +02:00
Timm Bäder
dbc49e7742 transform: Fix identity transform fast paths 
Returning an extra ref will cause leaks later.
 2019-07-07 07:24:00 +02:00
Timm Bäder
3bc3e140dd transform: Add transform_bounds fast path for 2D_AFFINE transforms 
E.g. anything involving a scale. This is important when e.g. scrolling
in the node list in the recorder, which scales every recorded node down
to fit in the list.
 2019-06-29 09:49:38 +02:00
Timm Bäder
8dd74eac2e transform: Add skew parsing 2019-06-29 07:15:43 +02:00