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Render the main overlay child only once

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Use a separate snapshot to capture the main child render node
and reuse it multiple times, instead of generating multiple
nodes for the same content.
This commit is contained in:
Matthias Clasen 2017-09-03 22:26:56 -04:00
parent 93c67eaf6d
commit 5f6fdc4dd8
1 changed files with 28 additions and 6 deletions
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34
gtk/gtkoverlay.c
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@ -25,7 +25,7 @@
#include "gtkscrolledwindow.h"
#include "gtkwidgetprivate.h"
#include "gtkmarshalers.h"
#include "gtksnapshot.h"
#include "gtksnapshotprivate.h"
#include "gtkprivate.h"
#include "gtkintl.h"
@ -619,10 +619,12 @@ gtk_overlay_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkWidget *main_widget;
GskRenderNode *main_widget_node = NULL;
GtkWidget *child;
GtkAllocation main_alloc;
cairo_region_t *clip = NULL;
int i;
graphene_matrix_t translate;
main_widget = gtk_bin_get_child (GTK_BIN (widget));
gtk_widget_get_allocation (widget, &main_alloc);
@ -638,21 +640,39 @@ gtk_overlay_snapshot (GtkWidget *widget,
GtkAllocation alloc;
graphene_rect_t bounds;
if (main_widget_node == NULL)
{
GtkSnapshot child_snapshot;
gtk_snapshot_init (&child_snapshot,
gtk_snapshot_get_renderer (snapshot),
snapshot->record_names,
NULL,
"OverlayCaptureMainChild");
gtk_snapshot_offset (&child_snapshot, main_alloc.x, main_alloc.y);
gtk_widget_snapshot (main_widget, &child_snapshot);
gtk_snapshot_offset (&child_snapshot, -main_alloc.x, -main_alloc.y);
main_widget_node = gtk_snapshot_finish (&child_snapshot);
graphene_matrix_init_translate (&translate, &GRAPHENE_POINT3D_INIT (main_alloc.x,main_alloc.y, 0));
}
gtk_widget_get_allocation (child, &alloc);
graphene_rect_init (&bounds, alloc.x, alloc.y, alloc.width, alloc.height);
gtk_snapshot_push_clip (snapshot, &bounds, "Overlay Effect Clip");
gtk_snapshot_push_blur (snapshot, blur, "Overlay Effect");
gtk_widget_snapshot_child (widget, main_widget, snapshot);
gtk_snapshot_append_node (snapshot, main_widget_node);
gtk_snapshot_pop (snapshot);
gtk_snapshot_pop (snapshot);
if (clip == NULL)
{
cairo_rectangle_int_t rect;
rect.x = rect.y = 0;
rect.width = main_alloc.width;
rect.height = main_alloc.height;
clip = cairo_region_create ();
main_alloc.x = main_alloc.y = 0;
cairo_region_union_rectangle (clip, (cairo_rectangle_int_t *)&main_alloc);
cairo_region_union_rectangle (clip, &rect);
}
cairo_region_subtract_rectangle (clip, (cairo_rectangle_int_t *)&alloc);
}
}
@ -671,7 +691,7 @@ gtk_overlay_snapshot (GtkWidget *widget,
cairo_region_get_rectangle (clip, i, &rect);
graphene_rect_init (&bounds, rect.x, rect.y, rect.width, rect.height);
gtk_snapshot_push_clip (snapshot, &bounds, "Overlay Non-Effect Clip");
gtk_widget_snapshot_child (widget, main_widget, snapshot);
gtk_snapshot_append_node (snapshot, main_widget_node);
gtk_snapshot_pop (snapshot);
}
@ -684,6 +704,8 @@ gtk_overlay_snapshot (GtkWidget *widget,
if (child != main_widget)
gtk_widget_snapshot_child (widget, child, snapshot);
}
gsk_render_node_unref (main_widget_node);
}
static void