From c7723a237b82ff417e164621c7121858e0fc1bf9 Mon Sep 17 00:00:00 2001
From: Olivier Goffart <ogoffart@sixtyfps.io>
Date: Mon, 15 Feb 2021 21:00:39 +0100
Subject: [PATCH] GL colorize

reset properly the canvas state (such as the clip and so on)
and rotate the image otherwise it is painted upside down
---
 sixtyfps_runtime/rendering_backends/gl/lib.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sixtyfps_runtime/rendering_backends/gl/lib.rs b/sixtyfps_runtime/rendering_backends/gl/lib.rs
index 85ce24b74..a425a36f9 100644
--- a/sixtyfps_runtime/rendering_backends/gl/lib.rs
+++ b/sixtyfps_runtime/rendering_backends/gl/lib.rs
@@ -1045,7 +1045,9 @@ impl GLItemRenderer {
         let brush_paint = self.brush_to_paint(colorize_brush, &mut image_rect).unwrap();
 
         self.shared_data.canvas.borrow_mut().save_with(|canvas| {
-            canvas.reset_transform();
+            canvas.reset();
+            canvas.scale(1., -1.); // Image are rendered upside down
+            canvas.translate(0., -image_size.height);
             canvas.set_render_target(femtovg::RenderTarget::Image(colorized_image));
 
             canvas.global_composite_operation(femtovg::CompositeOperation::Copy);