Remove the pos parameter to the render functions and instead let
the item renderer apply the transformation on the rendere (femtovg
canvas or QPainter).
So `draw_*` functions in the backend now always operate in item local
coordinates.
Commit 8a66af0746 resulted in pending html
images not being strongly referenced anymore through the item's
rendering cache when first queried in the image size query. That means
they initially reported a size (1x1) and after loading they *should*
mark the bindings dirty that depend on the implicit size, but since the
image was deleted (and along with it the notifying property), the image
kept its visible (1x1) size.
Similarly, images would get loaded too much from disk - same cause,
different effect.
To fix this, go back to the earlier design where the renderer's image
cache keeps a strong reference.
Don't use the item's rendering cache to determine the image size, as
that's soley for rendering. The Qt backend doesn't use the item cache
and the GL backend neither after this change. Instead both backends have
a cache for decoded images.
There are two problems that this patch fixes:
* It may happen that the image is not loaded yet, which means
we need to wait with the colorization effect instead of colorizing
the dummy (1x1) texture.
* It may happen that we transition from a regular image to one
that has a valid colorization brush, in which case we need to
invalidate the graphics item cache.
We're using `Canvas::intersect_scissor` to combine the viewport clip of
the flickable with any child `Clip` element, for example. Unfortunately
`intersect_scissor` has a bug and this patch works around it by doing
the scissor intersection manually. This works because we don't apply a
global transform on the canvas -- all scaling and translation is done
locally in the draw functions.
The inner fill rect needs to follow the shape of the original rectangle.
When it has a radius we need to bleed it "slightly" into the shadow rect to avoid gaps,
and then draw it before the shadow.
Fixes#156
This allows filling glyphs with gradients. However femtovg
appears to apply the start/end position per-glyph
instead of globally - resulting in a different result than Qt.
Add support for built-in property aliases and rename `color` to
`background` - in preparation for it also changing to type brush.
Right now the alias is silent, a deprecation and overall change
will come in a subsequent change.
Rendering a circle using `rounded_rect` will create a path with `LineTo`
verbs for the edges. Unfortunately those create visible artefacts,
especially in lower resolutions.
Therefore this patch attempts to detect this scenario and draw a circle instead.
Fixes#152
We can use fontdb on all platforms, which gives consistent font query
behavior of application fonts. And then we also don't need our hand-made
"db" anymore for the wasm build and the included DejaVu font.
When a tile is open artifacts would be visible around the edge of the
tile. That's because a zero width rectangle would cause pixels to appear
with femtovg. The Qt backend however has an early abort in
`get_geometry!`.
This patches applies the same early-abort semantics to both backends and
switches to `<= 0`, corresponding to euclid::Size's `is_empty()`.
This intends to provide a configurable rectangular "drop shadow". The
API is modeled after CSS/HTML5 Canvas where the element can be "bound"
to an existing rectangular shape (geometry and radius), the offset can
be used to place the shadow and color and blur configure the shadow.
The shadow's color fades into transparent.
TODO (in subsequent changes):
* Documentation
* Qt implementation
