From 6baa5900fc80402298f285c7c9a2932028fbf7ee Mon Sep 17 00:00:00 2001
From: Surma <surma@surma.link>
Date: Fri, 15 Feb 2019 19:36:28 +0100
Subject: [PATCH] Implement tiling

---
 codecs/rotate/rotate.rs   |  18 ++++++++++++------
 codecs/rotate/rotate.wasm | Bin 462 -> 738 bytes
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/codecs/rotate/rotate.rs b/codecs/rotate/rotate.rs
index d1b19f01..73317eea 100644
--- a/codecs/rotate/rotate.rs
+++ b/codecs/rotate/rotate.rs
@@ -22,6 +22,8 @@ impl<T> HardUnwrap<T> for Option<T> {
     }
 }
 
+const TILE_SIZE: usize = 64;
+
 #[no_mangle]
 fn rotate(width: usize, height: usize, rotate: usize) {
     let num_pixels = width * height;
@@ -41,12 +43,16 @@ fn rotate(width: usize, height: usize, rotate: usize) {
         90 => {
             let new_width = height;
             let _new_height = width;
-            for y in 0..height {
-                for x in 0..width {
-                    let new_x = (new_width - 1) - y;
-                    let new_y = x;
-                    *out_b.get_mut(new_y * new_width + new_x).unwrap_hard() =
-                        *in_b.get(y * width + x).unwrap_hard();
+            for y_start in (0..height).step_by(TILE_SIZE) {
+                for x_start in (0..width).step_by(TILE_SIZE) {
+                    for y in y_start..(y_start + TILE_SIZE).min(height) {
+                        for x in x_start..(x_start + TILE_SIZE).min(width) {
+                            let new_x = (new_width - 1) - y;
+                            let new_y = x;
+                            *out_b.get_mut(new_y * new_width + new_x).unwrap_hard() =
+                                *in_b.get(y * width + x).unwrap_hard();
+                        }
+                    }
                 }
             }
         }
diff --git a/codecs/rotate/rotate.wasm b/codecs/rotate/rotate.wasm
index d7514e8e5e89a47fedca3eee56b49c0ca385168f..9977d58f8286fad73675f7ac6afcdc1647331ae4 100755
GIT binary patch
literal 738
zcmY+B&2G~`6ov2HnIw)UcATHafo$%0#foLObQUd&0QC`EqeenQLQCTf5|SexfT!sL
z^fh41o@d}p2n!T>{&Ma)-`t^Qzf(k{QobR&(OuV(HkuTfp1M~`^|Yd*|4etv9}Z7s
zJNkbfyfppYW_S1Sg~`_ShfQ-|zi;*%t<t)_ZQ7>Ze7e=#f4FO#c7vSXMnn0_s6{7A
zXj^H|txtk8eDU`u?0?YPj4=PC*BJ{z;d-Lt)EDEw1~>5J7+<1~MUbk`mncd6t56w9
z))i+)jHqi&3dc_rgjZN%yI#4W7?+Hcl_W|u1S+_p{U?P5bZ=HJ6?kqPbiUiWkqofl
z_M^*?o#Puv<P*af3_!?*qGRp~$)jr?V{m*#$Ri*ASXX9+!$Jr!kU18EBJ5FXu^)ph
zy@nk`vGPbnAexAkBAj|Ql@X8&#B3`Q+)OgGhuh%hV%?b}ZV}mFJBe0PXJqC|nIo-m
zOMM|)&SV+hWvQ4;3|h*#=C}sX3#M}>IKtXUDY#6D^L{}65}DOfChLr>g$o7bO{Evy
zRA#=5Ec5tKb6G^?LQ*Kv2^%lRR)%PQtYo~e#>=6XrB56K3h_GfU=ThraAW||2_;&V
dqL1NYnD|F^g$uI(&R5TE@$GOp5LrVQ{s3;QY^DGJ

delta 249
zcmXX=F>b>!5R*=lV@o>w3%m?P^MTIR;Gsjue&WU=V*tOPK#P2*Z)o?9eMwG8mm>-A
zNdBeo@bQ*^DUd5a<oWY*+I`#gm^Susjm|Q_cQ}~ZRYpW4(<)ONB{wGpNva`-l~#-!
zI}<aqL{wQY3568_1+%{JfVkNSSURW93GtEK6FI~dRpKiac(qT$L4`0kug4kVGrLkO
o#;H|i3@RD5PpX*O#rA-^lab6>$-Kmb@W1E!PN(4>b^W4;8z9CctpET3