Upgrade Glutin to v0.19.0

Some changes include:

• Use the with_hardware_acceleration function on the ContextBuilder to not require the discrete GPU
• Remove the LMenu and RMenu virtual key codes (winit 0.16.0 removed these because Windows now generates LAlt and RAlt instead
• Replace set_cursor_state with hide_cursor (winit 0.16.0 removed the set_cursor_state function)
• Replace GlWindow::hidpi_factor with GlWindow::get_hidpi_factor and change to expecting an f64
• Use the glutin/winit dpi size and position types where possible

Glutin's dpi change event has been implemented. All size events now
return logical sizes. As a result of that, the logical sizes are translated
in the `display::handle_rezize` method so DPI scaling works correctly.

When the DPI is changed, the glyph cache is updated to make use of the
correct font size again.

Moving a window to a different screen which is a different DPI caused a
racing condition where the logical size of the event was sent to the
`handle_resize` method in `src/display.rs`, however if there was a DPI
change event before `handle_resize` is able to process this message, it
would incorrectly use the new DPI to scale the resize event.

To solve this issue instead of sending the logical size to the
`handle_resize` method and then converting it to a physical size in
there, the `LogicalSize` of the resize event is transformed into a
`PhysicalSize` as soon as it's received. This fixes potential racing
conditions since all events are processed in order.

The padding has been changed so it's also scaled by DPR.

The `scale_with_dpi` config option has been removed. If it's not present
a warning will be emitted.

The `winit` dependency on Windows has been removed. All interactions
with winit in Alacritty are handled through glutin.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/input.rs b/src/input.rs
index 5235066b..600a1abe 100644
--- a/src/input.rs
+++ b/src/input.rs
@@ -575,14 +575,15 @@ impl<'a, A: ActionContext + 'a> Processor<'a, A> {
 
                 self.ctx.mouse_mut().lines_scrolled = to_scroll % 1.0;
             },
-            MouseScrollDelta::PixelDelta(_x, y) => {
+            MouseScrollDelta::PixelDelta(lpos) => {
                 match phase {
                     TouchPhase::Started => {
                         // Reset offset to zero
                         self.ctx.mouse_mut().scroll_px = 0;
                     },
                     TouchPhase::Moved => {
-                        self.ctx.mouse_mut().scroll_px += y as i32;
+                        let (_x, y): (i32, i32) = lpos.into();
+                        self.ctx.mouse_mut().scroll_px += y;
                         let height = self.ctx.size_info().cell_height as i32;
 
                         while self.ctx.mouse().scroll_px.abs() >= height {
@@ -904,6 +905,7 @@ mod tests {
                     cell_height: 3.0,
                     padding_x: 0.0,
                     padding_y: 0.0,
+                    dpr: 1.0,
                 };
 
                 let mut terminal = Term::new(&config, size);