Wayland: Fix scroll offsets being inverted

Scrolling offsets were inverted compared to X11 and Win32. Fixes #1463. (cherry picked from commit f760b12)
glfw · Jul 16, 2020 · 1147042 · 1147042
1 parent bd2fb9e
commit 1147042
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diff --git a/README.md b/README.md
@@ -136,6 +136,8 @@ information on what to include when reporting a bug.
    reported (#1112,#1415,#1472,#1616)
  - [Wayland] Bugfix: Repeated keys could be reported with `NULL` window (#1704)
  - [Wayland] Bugfix: Retrieving partial framebuffer size would segfault
+ - [Wayland] Bugfix: Scrolling offsets were inverted compared to other platforms
+   (#1463)
 
 
 ## Contact
@@ -274,6 +276,7 @@ skills.
  - ndogxj
  - Kristian Nielsen
  - Kamil Nowakowski
+ - onox
  - Denis Ovod
  - Ozzy
  - Andri Pálsson

diff --git a/src/wl_init.c b/src/wl_init.c
@@ -347,9 +347,9 @@ static void pointerHandleAxis(void* data,
            axis == WL_POINTER_AXIS_VERTICAL_SCROLL);
 
     if (axis == WL_POINTER_AXIS_HORIZONTAL_SCROLL)
-        x = wl_fixed_to_double(value) * scrollFactor;
+        x = -wl_fixed_to_double(value) * scrollFactor;
     else if (axis == WL_POINTER_AXIS_VERTICAL_SCROLL)
-        y = wl_fixed_to_double(value) * scrollFactor;
+        y = -wl_fixed_to_double(value) * scrollFactor;
 
     _glfwInputScroll(window, x, y);
 }