[tor-commits] [tor-browser] 163/311: Bug 1758168 - Fix for fractional sizes when scaling surfaces > max size r=gfx-reviewers, lsalzman a=dmeehan

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pierov pushed a commit to branch geckoview-99.0.1-11.0-1
in repository tor-browser.

commit aa0497339469293bd8aaa762cbb70251e6bfc83e
Author: Glenn Watson <git@xxxxxxxxxxxxxxxxxxxx>
AuthorDate: Sun Mar 13 20:11:08 2022 +0000

    Bug 1758168 - Fix for fractional sizes when scaling surfaces > max size r=gfx-reviewers,lsalzman a=dmeehan
    
    Differential Revision: https://phabricator.services.mozilla.com/D140595
---
 gfx/wr/webrender/src/picture.rs | 61 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 59 insertions(+), 2 deletions(-)

diff --git a/gfx/wr/webrender/src/picture.rs b/gfx/wr/webrender/src/picture.rs
index 6a381fb36d061..1f601479f6dd2 100644
--- a/gfx/wr/webrender/src/picture.rs
+++ b/gfx/wr/webrender/src/picture.rs
@@ -6801,13 +6801,13 @@ fn get_surface_rects(
     let task_size_f = clipped.size();
 
     if task_size_f.width > MAX_SURFACE_SIZE || task_size_f.height > MAX_SURFACE_SIZE {
-        let max_dimension = clipped_local.width().max(clipped_local.height());
+        let max_dimension = clipped_local.width().max(clipped_local.height()).ceil();
 
         surface.raster_spatial_node_index = surface.surface_spatial_node_index;
         surface.device_pixel_scale = Scale::new(MAX_SURFACE_SIZE / max_dimension);
 
         clipped = (clipped_local.cast_unit() * surface.device_pixel_scale).round();
-        unclipped = (unclipped_local.cast_unit() * surface.device_pixel_scale).round();
+        unclipped = unclipped_local.cast_unit() * surface.device_pixel_scale;
     }
 
     let task_size = clipped.size().to_i32();
@@ -6864,3 +6864,60 @@ fn calculate_uv_rect_kind(
         bottom_right,
     }
 }
+
+#[test]
+fn test_large_surface_scale_1() {
+    use crate::spatial_tree::{SceneSpatialTree, SpatialTree};
+
+    let mut cst = SceneSpatialTree::new();
+    let root_reference_frame_index = cst.root_reference_frame_index();
+
+    let mut spatial_tree = SpatialTree::new();
+    spatial_tree.apply_updates(cst.end_frame_and_get_pending_updates());
+    spatial_tree.update_tree(&SceneProperties::new());
+
+    let map_local_to_surface = SpaceMapper::new_with_target(
+        root_reference_frame_index,
+        root_reference_frame_index,
+        PictureRect::max_rect(),
+        &spatial_tree,
+    );
+
+    let mut surfaces = vec![
+        SurfaceInfo {
+            local_rect: PictureRect::max_rect(),
+            is_opaque: true,
+            clipping_rect: PictureRect::max_rect(),
+            map_local_to_surface: map_local_to_surface.clone(),
+            raster_spatial_node_index: root_reference_frame_index,
+            surface_spatial_node_index: root_reference_frame_index,
+            render_tasks: None,
+            device_pixel_scale: DevicePixelScale::new(1.0),
+            world_scale_factors: (1.0, 1.0),
+            local_scale: (1.0, 1.0),
+        },
+        SurfaceInfo {
+            local_rect: PictureRect::new(
+                PicturePoint::new(52.76350021362305, 0.0),
+                PicturePoint::new(159.6738739013672, 35.0),
+            ),
+            is_opaque: true,
+            clipping_rect: PictureRect::max_rect(),
+            map_local_to_surface,
+            raster_spatial_node_index: root_reference_frame_index,
+            surface_spatial_node_index: root_reference_frame_index,
+            render_tasks: None,
+            device_pixel_scale: DevicePixelScale::new(43.82798767089844),
+            world_scale_factors: (1.0, 1.0),
+            local_scale: (1.0, 1.0),
+        },
+    ];
+
+    get_surface_rects(
+        SurfaceIndex(1),
+        &PictureCompositeMode::Blit(BlitReason::ISOLATE),
+        SurfaceIndex(0),
+        &mut surfaces,
+        &spatial_tree,
+    );
+}

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