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Move canvas.putImageData checks to the DOM side

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This commit is contained in:
Anthony Ramine 2018-10-03 12:11:28 +02:00
parent caa4d190af
commit 62ea3c093a
2 changed files with 61 additions and 57 deletions
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47
components/canvas/canvas_data.rs
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@ -454,57 +454,12 @@ impl<'a> CanvasData<'a> {
imagedata: Vec<u8>,
offset: Vector2D<f64>,
image_data_size: Size2D<f64>,
mut dirty_rect: Rect<f64>
dirty_rect: Rect<f64>
) {
if image_data_size.width <= 0.0 || image_data_size.height <= 0.0 {
return
}
assert_eq!(image_data_size.width * image_data_size.height * 4.0, imagedata.len() as f64);
// Step 1. TODO (neutered data)
// Step 2.
if dirty_rect.size.width < 0.0f64 {
dirty_rect.origin.x += dirty_rect.size.width;
dirty_rect.size.width = -dirty_rect.size.width;
}
if dirty_rect.size.height < 0.0f64 {
dirty_rect.origin.y += dirty_rect.size.height;
dirty_rect.size.height = -dirty_rect.size.height;
}
// Step 3.
if dirty_rect.origin.x < 0.0f64 {
dirty_rect.size.width += dirty_rect.origin.x;
dirty_rect.origin.x = 0.0f64;
}
if dirty_rect.origin.y < 0.0f64 {
dirty_rect.size.height += dirty_rect.origin.y;
dirty_rect.origin.y = 0.0f64;
}
// Step 4.
if dirty_rect.max_x() > image_data_size.width {
dirty_rect.size.width = image_data_size.width - dirty_rect.origin.x;
}
if dirty_rect.max_y() > image_data_size.height {
dirty_rect.size.height = image_data_size.height - dirty_rect.origin.y;
}
// 5) If either dirtyWidth or dirtyHeight is negative or zero,
// stop without affecting any bitmaps
if dirty_rect.size.width <= 0.0 || dirty_rect.size.height <= 0.0 {
return
}
// Step 6.
let dest_rect = dirty_rect.translate(&offset).to_i32();
// azure_hl operates with integers. We need to cast the image size
let image_size = image_data_size.to_i32();
let first_pixel = dest_rect.origin - offset.to_i32();