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Improve gl.putImageData

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This commit should allow us to send smaller blobs to the canvas thread,
I made it into its own commit just to try=wpt.
This commit is contained in:
Anthony Ramine 2018-10-04 16:29:45 +02:00
parent 3d910feb3a
commit 82c7d71811
2 changed files with 31 additions and 8 deletions
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9
components/canvas/canvas_data.rs
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@ -454,14 +454,13 @@ impl<'a> CanvasData<'a> {
imagedata: Vec<u8>,
offset: Vector2D<i32>,
image_data_size: Size2D<i32>,
dirty_rect: Rect<i32>,
dest_rect: Rect<i32>,
) {
assert_eq!(image_data_size.width * image_data_size.height * 4, imagedata.len() as i32);
let dest_rect = dirty_rect.translate(&offset);
let image_size = image_data_size;
let first_pixel = dest_rect.origin - offset;
let first_pixel = dest_rect.origin;
let mut src_line = (first_pixel.y * (image_size.width * 4) + first_pixel.x * 4) as usize;
let mut dest =
@ -487,9 +486,7 @@ impl<'a> CanvasData<'a> {
dest_rect.size,
dest_rect.size.width * 4,
SurfaceFormat::B8G8R8A8) {
self.drawtarget.copy_surface(source_surface,
Rect::new(Point2D::new(0, 0), dest_rect.size),
dest_rect.origin);
self.drawtarget.copy_surface(source_surface, Rect::from_size(dest_rect.size), offset.to_point());
}
}