external-repos/squoosh
1
0
Fork 1
mirror of https://github.com/GoogleChromeLabs/squoosh.git synced 2025-11-15 10:09:45 +00:00
Code Issues Packages Projects Releases Wiki Activity

Switch to 8 byte offset

Browse Source
This commit is contained in:
Surma
2019-02-15 19:13:22 +01:00
parent 0d1e5ef119
commit a316120b69
3 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
codecs/rotate/rotate.rs
View File

@@ -22,8 +22,8 @@ fn rotate(width: usize, height: usize, _rotate: usize) {
let in_b: &mut [u32];
let out_b: &mut [u32];
unsafe {
in_b = from_raw_parts_mut::<u32>(4 as *mut u32, num_pixels);
out_b = from_raw_parts_mut::<u32>((num_pixels * 4 + 4) as *mut u32, num_pixels);
in_b = from_raw_parts_mut::<u32>(8 as *mut u32, num_pixels);
out_b = from_raw_parts_mut::<u32>((num_pixels * 4 + 8) as *mut u32, num_pixels);
}
let new_width = height;

BIN
codecs/rotate/rotate.wasm
View File

Binary file not shown.

6
src/codecs/rotate/processor.ts
View File

@@ -11,7 +11,7 @@ export async function rotate(
// Number of wasm memory pages (á 64KiB) needed to store the image twice.
const bytesPerImage = data.width * data.height * 4;
const numPagesNeeded = Math.ceil((bytesPerImage * 2 + 4) / (64 * 1024));
const numPagesNeeded = Math.ceil((bytesPerImage * 2 + 8) / (64 * 1024));
// Only count full pages, just to be safe.
const numPagesAvailable = Math.floor(instance.exports.memory.buffer.byteLength / (64 * 1024));
const additionalPagesToAllocate = numPagesNeeded - numPagesAvailable;
@@ -20,13 +20,13 @@ export async function rotate(
instance.exports.memory.grow(additionalPagesToAllocate);
}
const view = new Uint8ClampedArray(instance.exports.memory.buffer);
view.set(data.data, 4);
view.set(data.data, 8);
instance.exports.rotate(data.width, data.height, opts.rotate);
const flipDimensions = opts.rotate % 180 !== 0;
return new ImageData(
view.slice(bytesPerImage + 4, bytesPerImage * 2 + 4),
view.slice(bytesPerImage + 8, bytesPerImage * 2 + 8),
flipDimensions ? data.height : data.width,
flipDimensions ? data.width : data.height,
);