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Don't create 2D canvas contexts arbitrarily

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Sometimes, the canvas still has no rendering context, in this case it represents
a transparent black rectangle.
This commit is contained in:
Anthony Ramine 2018-09-15 12:28:53 +02:00
parent ed673f8070
commit f1e8eb640c
4 changed files with 107 additions and 90 deletions
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12
components/canvas/canvas_paint_thread.rs
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@ -132,15 +132,21 @@ impl<'a> CanvasPaintThread <'a> {
self.canvas(canvas_id).is_point_in_path(x, y, fill_rule, chan)
},
Canvas2dMsg::DrawImage(
mut imagedata,
imagedata,
image_size,
dest_rect,
source_rect,
smoothing_enabled,
) => {
byte_swap(&mut imagedata);
let data = match imagedata {
None => vec![0; image_size.width as usize * image_size.height as usize * 4],
Some(mut data) => {
byte_swap(&mut data);
data.into()
},
};
self.canvas(canvas_id).draw_image(
imagedata.into(),
data,
image_size,
dest_rect,
source_rect,