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broadway: Track the clip region in the renderer

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If we know what can't possibly be visible we may can later decide to
not expose a node.
This commit is contained in:
Alexander Larsson 2020-08-26 16:55:56 +02:00
parent 45046a53eb
commit 4b1ea7c4a1
1 changed files with 41 additions and 14 deletions
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55
gsk/broadway/gskbroadwayrenderer.c
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@ -467,14 +467,21 @@ get_colorized_texture (GdkTexture *texture,
/* Note: This tracks the offset so that we can convert
the absolute coordinates of the GskRenderNodes to
parent-relative which is what the dom uses, and
which is good for re-using subtrees. */
* the absolute coordinates of the GskRenderNodes to
* parent-relative which is what the dom uses, and
* which is good for re-using subtrees.
*
* We also track the clip bounds which is a best-effort
* clip region tracking (i.e. can be unset or larger
* than real clip, but not smaller). This can be used
* to avoid sending completely clipped nodes.
*/
static void
gsk_broadway_renderer_add_node (GskRenderer *renderer,
GskRenderNode *node,
float offset_x,
float offset_y)
float offset_y,
graphene_rect_t *clip_bounds)
{
GdkDisplay *display = gdk_surface_get_display (gsk_renderer_get_surface (renderer));
GdkBroadwayDisplay *broadway_display = GDK_BROADWAY_DISPLAY (display);
@ -617,7 +624,7 @@ gsk_broadway_renderer_add_node (GskRenderer *renderer,
}
gsk_broadway_renderer_add_node (renderer,
gsk_shadow_node_get_child (node),
offset_x, offset_y);
offset_x, offset_y, clip_bounds);
}
return;
@ -627,7 +634,7 @@ gsk_broadway_renderer_add_node (GskRenderer *renderer,
add_float (nodes, gsk_opacity_node_get_opacity (node));
gsk_broadway_renderer_add_node (renderer,
gsk_opacity_node_get_child (node),
offset_x, offset_y);
offset_x, offset_y, clip_bounds);
}
return;
@ -635,12 +642,17 @@ gsk_broadway_renderer_add_node (GskRenderer *renderer,
if (add_new_node (renderer, node, BROADWAY_NODE_ROUNDED_CLIP))
{
const GskRoundedRect *rclip = gsk_rounded_clip_node_peek_clip (node);
graphene_rect_t child_bounds = rclip->bounds;
if (clip_bounds)
graphene_rect_intersection (&child_bounds, clip_bounds, &child_bounds);
add_rounded_rect (nodes, rclip, offset_x, offset_y);
gsk_broadway_renderer_add_node (renderer,
gsk_rounded_clip_node_get_child (node),
rclip->bounds.origin.x,
rclip->bounds.origin.y);
rclip->bounds.origin.y,
&child_bounds);
}
return;
@ -648,12 +660,17 @@ gsk_broadway_renderer_add_node (GskRenderer *renderer,
if (add_new_node (renderer, node, BROADWAY_NODE_CLIP))
{
const graphene_rect_t *clip = gsk_clip_node_peek_clip (node);
graphene_rect_t child_bounds = *clip;
if (clip_bounds)
graphene_rect_intersection (&child_bounds, clip_bounds, &child_bounds);
add_rect (nodes, clip, offset_x, offset_y);
gsk_broadway_renderer_add_node (renderer,
gsk_clip_node_get_child (node),
clip->origin.x,
clip->origin.y);
clip->origin.y,
&child_bounds);
}
return;
@ -666,13 +683,22 @@ gsk_broadway_renderer_add_node (GskRenderer *renderer,
if (category >= GSK_TRANSFORM_CATEGORY_2D_TRANSLATE)
{
float dx, dy;
gsk_transform_to_translate (transform, &dx, &dy);
graphene_rect_t child_bounds;
graphene_rect_t *child_bounds_p = NULL;
gsk_transform_to_translate (transform, &dx, &dy);
add_uint32 (nodes, 0); // Translate
add_xy (nodes, dx, dy, 0, 0);
if (clip_bounds)
{
graphene_rect_offset_r (clip_bounds, -dx, -dy, &child_bounds);
child_bounds_p = &child_bounds;
}
gsk_broadway_renderer_add_node (renderer,
gsk_transform_node_get_child (node),
0, 0);
0, 0, child_bounds_p);
}
else
{
@ -681,9 +707,10 @@ gsk_broadway_renderer_add_node (GskRenderer *renderer,
gsk_transform_to_matrix (transform, &matrix);
add_uint32 (nodes, 1); // General transform
add_matrix (nodes, &matrix);
// We just drop the clip bounds here to make things simpler
gsk_broadway_renderer_add_node (renderer,
gsk_transform_node_get_child (node),
0, 0);
0, 0, NULL);
}
}
}
@ -695,7 +722,7 @@ gsk_broadway_renderer_add_node (GskRenderer *renderer,
const char *message = gsk_debug_node_get_message (node);
add_string (nodes, message);
gsk_broadway_renderer_add_node (renderer,
gsk_debug_node_get_child (node), offset_x, offset_y);
gsk_debug_node_get_child (node), offset_x, offset_y, clip_bounds);
}
return;
@ -709,7 +736,7 @@ gsk_broadway_renderer_add_node (GskRenderer *renderer,
add_uint32 (nodes, gsk_container_node_get_n_children (node));
for (i = 0; i < gsk_container_node_get_n_children (node); i++)
gsk_broadway_renderer_add_node (renderer,
gsk_container_node_get_child (node, i), offset_x, offset_y);
gsk_container_node_get_child (node, i), offset_x, offset_y, clip_bounds);
}
return;
@ -798,7 +825,7 @@ gsk_broadway_renderer_render (GskRenderer *renderer,
self->nodes = self->draw_context->nodes;
self->node_textures = self->draw_context->node_textures;
gsk_broadway_renderer_add_node (renderer, root, 0, 0);
gsk_broadway_renderer_add_node (renderer, root, 0, 0, NULL);
self->nodes = NULL;
self->node_textures = NULL;