From 39e9728b0e82dfff05f7c9381eeeca030f9dcb39 Mon Sep 17 00:00:00 2001
From: Phil Howard <phil@gadgetoid.com>
Date: Fri, 11 Mar 2022 13:48:39 +0000
Subject: [PATCH] Badger2040: Fix text rotation aliasing for #290

Fix text rendering at 90, 180 and 270 degree rotations by avoiding float -> int truncation.
---
 libraries/badger2040/badger2040.cpp | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/libraries/badger2040/badger2040.cpp b/libraries/badger2040/badger2040.cpp
index 0b65395b..451fb097 100644
--- a/libraries/badger2040/badger2040.cpp
+++ b/libraries/badger2040/badger2040.cpp
@@ -264,11 +264,11 @@ namespace pimoroni {
         int8_t nx = (*pv++) * s;
         int8_t ny = (*pv++) * s;
 
-        int rcx = cx * ac - cy * as;
-        int rcy = cx * as + cy * ac;
+        int rcx = (cx * ac - cy * as) + 0.5f;
+        int rcy = (cx * as + cy * ac) + 0.5f;
 
-        int rnx = nx * ac - ny * as;
-        int rny = nx * as + ny * ac;
+        int rnx = (nx * ac - ny * as) + 0.5f;
+        int rny = (nx * as + ny * ac) + 0.5f;
 
         if(pen_down) {
           line(rcx + x, rcy + y, rnx + x, rny + y);
@@ -293,8 +293,8 @@ namespace pimoroni {
     float ac = cos(deg2rad(a));
 
     for(auto &c : message) {
-      int rcx = ox * ac;
-      int rcy = ox * as;
+      int rcx = (ox * ac) + 0.5f;
+      int rcy = (ox * as) + 0.5f;
 
       ox += glyph(c, cx + rcx, cy + rcy, s, a);
     }