From a316120b6987b8b60eebc9dd059a3102e5215164 Mon Sep 17 00:00:00 2001
From: Surma <surma@surma.link>
Date: Fri, 15 Feb 2019 19:13:22 +0100
Subject: [PATCH] Switch to 8 byte offset

---
 codecs/rotate/rotate.rs        |   4 ++--
 codecs/rotate/rotate.wasm      | Bin 353 -> 353 bytes
 src/codecs/rotate/processor.ts |   6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/codecs/rotate/rotate.rs b/codecs/rotate/rotate.rs
index ccac2ef2..645e1784 100644
--- a/codecs/rotate/rotate.rs
+++ b/codecs/rotate/rotate.rs
@@ -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;
diff --git a/codecs/rotate/rotate.wasm b/codecs/rotate/rotate.wasm
index 4ff666499b95b845874e0c3ea1816d7764f95e62..92547dc9390d27ade493b2173edabf851701bb92 100755
GIT binary patch
delta 188
zcmW-bF%E)25JiXG1r~+{j_`-Xd$0wCF<!%BVrgk2v9-}7as+SSVDn%8<Y)fh+~(e|
zOO6si+1;c>v7<8gP^nRXu2ZyAjtXy7X);L*FKq1m>}J$UA~Oj=daw*=Wb`v4S|mNE
zfPOKFpYP#Rsf<Xu&?%ulCStY_sXYuR)mHG{%V_f5n$YdZ4*s7UczmwwO2mOoew?};
AVgLXD

delta 188
zcmW-aI}XA?3`CvX&DYsvk1&qJJ+eg#gt!KUMM;T7L`wrl%n`T&4$X{b^yJyx=H9Oh
zD7%{k6uXs{9x4?I&~>V<%0c1HRhmrF<{%xsu-(0%-Hd99WFexH0W2dLNq$C+7E#YJ
zU|3A*&-ZXDRT5$@bc(2sk(do4l@=X>+F#zc8BM<18v32=;s4~w>A9{e5eG8)0i%!|
AU;qFB

diff --git a/src/codecs/rotate/processor.ts b/src/codecs/rotate/processor.ts
index 30bac75c..d880ac97 100644
--- a/src/codecs/rotate/processor.ts
+++ b/src/codecs/rotate/processor.ts
@@ -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,
   );