Switch viewport before rendering rectangles

To make sure it is possible to draw over the complete window, the
viewport is removed before rendering rectangles now.
This makes the visual bell behave properly and flash over the padding of
the terminal too, instead of just flashing the grid.

However when rendering a rectangle now, the padding has to be taken into
consideration.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/renderer/mod.rs b/src/renderer/mod.rs
index d08095f7..7c3328f9 100644
--- a/src/renderer/mod.rs
+++ b/src/renderer/mod.rs
@@ -675,6 +675,9 @@ impl QuadRenderer {
             // Swap program
             gl::UseProgram(self.rect_program.id);
 
+            // Remove padding from viewport
+            gl::Viewport(0, 0, props.width as i32, props.height as i32);
+
             // Change blending strategy
             gl::BlendFunc(gl::SRC_ALPHA, gl::ONE_MINUS_SRC_ALPHA);
 
@@ -707,6 +710,13 @@ impl QuadRenderer {
             gl::BindBuffer(gl::ARRAY_BUFFER, 0);
             gl::BindVertexArray(0);
 
+            // Add padding to viewport again
+            let x_pad = config.padding().x as i32;
+            let y_pad = config.padding().y as i32;
+            let width = props.width as i32;
+            let height = props.height as i32;
+            gl::Viewport(x_pad, y_pad, width - 2 * y_pad, height - 2 * y_pad);
+
             // Disable program
             gl::UseProgram(0);
         }