Move the Clear call to the end of drawing those scenarios doesn't need to retain paints resources.
We should show the examples as the best usage.
@Issues: 75
we introduced shared memory pool for avoiding reallocate memory
while it process the stroke outlines, It experimentally increase
the outline data if we use the allocated memory for multiples shape strokes,
we don't need to alloc/free memory during the process.
This shared outline memory is allocated for threads count
so that we don't interrupt memory access during the tasks.
@Issues: 75
Added opacity setter/getter to CAPI. They will be useful to simplify
code responsible for set visiblility of paint.
@API Additions:
Tvg_Result tvg_paint_set_opacity(Tvg_Paint* paint, uint8_t opacity)
Tvg_Result tvg_paint_get_opacity(Tvg_Paint* paint, uint8_t* opacity)
The algorithm erroneously treated some shapes (like isosceles trapezoids
and specifically arranged zero width parallelograms) as rectangles,
which causes the whole bbox to be filled.
We introduced separate opacity interface to adjust alpha value by paint.
This opacity will affect to whole paint image if paint is a group of paints.
Also, this opacity is to multipy with fill/stroke alpha values.
This means if the opacity is valid, the paint might deal with a composition step,
which is very expensive due to additional rendering step.
One tip is, if you want to toggle on/off for a certian paint,
you can set opacity to 255 or 0.
@API Additions:
Result Paint::opacity(uint8_t o) noexcept;
uint8_t Paint::opacity() const noexcept;
@Examples: examples/Opacity
@Issues: 94
Fill rule is used to select how paths are filled.
For both fill rules, wheter or not a point is included in the fill is determined by taking a ray
from that point to infinity and looking at intersections with the path. The ray can be in any
direction, as long as it doens't pass through the end point of a segment or have a tricky
intersection such as intersecting tangent to the path.
@API Addtions:
enum class TVG_EXPORT FillRule { Winding = 0, EvenOdd };
Result Fill::rule(FillRule r) noexcept;
FillRule Fill::rule() const noexcept;
@Examples:
shape->rule(FillRule::EvenOdd);
@issue: 97
If viewer calls load() with a data which does not have size changes of both
viewbox and canvas, then load() does not set a scale value.
This makes incorrect result on viewer side.
So thorvg wasm should set a scale value, whenever load() is called.
