color.RGBA has two problems with regards to using it.
First the color values need to be premultiplied, whereas most APIs
have non-premultiplied values. This is mainly to preserve color components
with low alpha values.
Second there are two ways to premultiply with sRGB. One is to premultiply
after sRGB conversion, the other is before. This makes using the API more
confusing.
Using color.NRGBA in sRGB makes it align with CSS.e
Signed-off-by: Egon Elbre <egonelbre@gmail.com>
Commit https://gioui.org/commit/b331407e81456 added text layout and shaping
based on io.Reader and changed Editor to use it. Unfortunately, as ~inkeliz
discovered, caching of shapes were also lost.
~inkeliz suggested fix,
https://lists.sr.ht/~eliasnaur/gio-patches/patches/15059
adds caching of shapes to Editor to regain lost performance.
This change repairs the cache to work on io.Reader API, in hope that the
already complicated Editor won't need additional caching.
Before this change, text layouts were represented as a slice of (rune, advance)
pairs. Unfortunately, this representation doesn't lend itself to caching of
shaping results, so change the representation of a line of text to be a pair
of text and advances:
package text
type Layout {
Text string
Advances []fixed.Int26_6
}
The Text field can then be used in a cache key, assuming Advances is
consistent with it.
The end result is that the two shaper variants of text.Shaper is reduced to
just one, and the Len field field of text.Line is no longer needed.
The changed representation adds a bit of extra work to package opentype.
Cleaning that up is left as a future TODO.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
I don't know why the 1/2 factor is there, but it leads to images being
rendered with a 0.5 pixel offset.
Remove the other useless checks while here: clipping 1px images shouldn't
be a problem and the destination rectangle is always non-zero (otherwise
it wouldn't be rendered).
Update the reference images that are subtly changed because of this fix.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Flat and Square caps are implemented.
Bevel joins are implemented.
Round caps, Round joins and Miter joins are left for another PR.
Signed-off-by: Sebastien Binet <s@sbinet.org>
This reverts commit e84a2344cf.
The fix is wrong: it's supressing the release key.Event, not key.EditEvents.
The culprit is that Editor fails to ignore release events.
Updates gio#171
Edit events were being sent twice, once upon key press and again on key release for special keys such as Enter, Arrow keys etc, which resulted in duplicate inputs while pressing these keys. key.EditEvents for special keys now fire once on key press only.
Signed-off-by: Rajiv Kanchan <rajiivkanchan@gmail.com>
PaintOp.Rect is the wrong abstraction; it implies a clip operation
better handled by package clip, and not all paints need it (colors).
Furthermore, it's awkward to specify a PaintOp that fills up the
current clip area, regardless of its size.
Redefine PathOp to mean "fill current clip area".
API change. Replace uses of PaintOp.Rect with a TransformOp applied
before the PaintOp.
Leave a TODO for the PathOp infinity area.
Fixes gio#167
Signed-off-by: Elias Naur <mail@eliasnaur.com>
We're about to remove PaintOp.Rect. Replacing PaintOps with Fill or
FillShape where possible will ease the transition.
Using Fill in tests exposed a problem with the infinity in paint.Fill.
Adjust it for now; it will be removed later.
Updates gio#167
Signed-off-by: Elias Naur <mail@eliasnaur.com>
This is effectively a revert of commit gioui.org/commit/69dfd2e3a5541.
ImageOp.Rect is the wrong abstraction; it implies a clipping operation that is
better handled by package clip.
API change. Uses of ImageOp.Rect should apply a clip.Rect before the PaintOp,
or use image.RGBA.SubImage (or similar).
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Egon Elbre pointed out that a difference of 20 means a 10% difference.
Lowering the tolerance to 5 didn't work on my setup; leave it at 10.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Implement key state for the following platforms:
js, wayland, windows, x11.
Unsupported platforms will continue to function as before, sending
key.Press for all key events.
Signed-off-by: Josiah Niedrauer <josiah@niedrauer.com>
The Window creates the context, and should also be responsible for
destroying it.
As a bonus, the wrong release ordering of loop.renderLoop is fixed.
Before this change, the context would be destroyed before the renderer
got a chance to destroy its resources.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
First, don't filter on HWND in GetMessage and PeekMessage, lest
thread-specific messages may get lost. See
https://devblogs.microsoft.com/oldnewthing/20050209-00/?p=36493
Second, replace the dead status with the detection of WM_QUIT; it's
what it's there for.
May update gio#168
Signed-off-by: Elias Naur <mail@eliasnaur.com>
The python package is gone, we may not need it and/or Debian installs
python3 by default.
curl is needed for automatically applying patches from the mailing list.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Egon Elbre