forked from AuroraMiddleware/gtk
ffc7b2bb0a
This allows being more specific about the size. It's useful in particular when the resulting render nodes might be too small for the size, not only when they are too large. For the latter case, using a clip node would be enough. It also requires adding a clip node when rendering the resulting paintable, but that should be optimized out by GtkSnapshot when not necessary.
150 lines
4.5 KiB
C
150 lines
4.5 KiB
C
/*
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* Copyright © 2018 Benjamin Otte
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkrendernodepaintableprivate.h"
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#include "gtksnapshot.h"
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struct _GtkRenderNodePaintable
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{
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GObject parent_instance;
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GskRenderNode *node;
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graphene_rect_t bounds;
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};
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struct _GtkRenderNodePaintableClass
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{
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GObjectClass parent_class;
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};
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static void
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gtk_render_node_paintable_paintable_snapshot (GdkPaintable *paintable,
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GdkSnapshot *snapshot,
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double width,
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double height)
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{
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GtkRenderNodePaintable *self = GTK_RENDER_NODE_PAINTABLE (paintable);
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gboolean needs_transform;
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needs_transform = self->bounds.size.width != width ||
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self->bounds.size.height != height;
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if (needs_transform)
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{
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graphene_matrix_t transform;
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graphene_matrix_init_scale (&transform,
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width / (self->bounds.size.width),
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height / (self->bounds.size.height),
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1.0);
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gtk_snapshot_push_transform (snapshot,
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&transform,
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"RenderNodeScaleToFit");
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}
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gtk_snapshot_push_clip (snapshot, &self->bounds, "RenderNodePaintableClip");
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gtk_snapshot_offset (snapshot, self->bounds.origin.x, self->bounds.origin.y);
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gtk_snapshot_append_node (snapshot, self->node);
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gtk_snapshot_offset (snapshot, -self->bounds.origin.x, -self->bounds.origin.y);
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gtk_snapshot_pop (snapshot);
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if (needs_transform)
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gtk_snapshot_pop (snapshot);
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}
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static GdkPaintableFlags
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gtk_render_node_paintable_paintable_get_flags (GdkPaintable *paintable)
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{
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return GDK_PAINTABLE_STATIC_CONTENTS | GDK_PAINTABLE_STATIC_SIZE;
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}
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static int
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gtk_render_node_paintable_paintable_get_intrinsic_width (GdkPaintable *paintable)
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{
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GtkRenderNodePaintable *self = GTK_RENDER_NODE_PAINTABLE (paintable);
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return self->bounds.size.width;
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}
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static int
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gtk_render_node_paintable_paintable_get_intrinsic_height (GdkPaintable *paintable)
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{
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GtkRenderNodePaintable *self = GTK_RENDER_NODE_PAINTABLE (paintable);
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return self->bounds.size.height;
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}
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static void
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gtk_render_node_paintable_paintable_init (GdkPaintableInterface *iface)
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{
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iface->snapshot = gtk_render_node_paintable_paintable_snapshot;
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iface->get_flags = gtk_render_node_paintable_paintable_get_flags;
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iface->get_intrinsic_width = gtk_render_node_paintable_paintable_get_intrinsic_width;
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iface->get_intrinsic_height = gtk_render_node_paintable_paintable_get_intrinsic_height;
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}
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G_DEFINE_TYPE_EXTENDED (GtkRenderNodePaintable, gtk_render_node_paintable, G_TYPE_OBJECT, 0,
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G_IMPLEMENT_INTERFACE (GDK_TYPE_PAINTABLE,
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gtk_render_node_paintable_paintable_init))
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static void
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gtk_render_node_paintable_dispose (GObject *object)
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{
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GtkRenderNodePaintable *self = GTK_RENDER_NODE_PAINTABLE (object);
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g_clear_pointer (&self->node, gsk_render_node_unref);
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G_OBJECT_CLASS (gtk_render_node_paintable_parent_class)->dispose (object);
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}
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static void
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gtk_render_node_paintable_class_init (GtkRenderNodePaintableClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->dispose = gtk_render_node_paintable_dispose;
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}
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static void
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gtk_render_node_paintable_init (GtkRenderNodePaintable *self)
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{
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}
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GdkPaintable *
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gtk_render_node_paintable_new (GskRenderNode *node,
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const graphene_rect_t *bounds)
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{
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GtkRenderNodePaintable *self;
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g_return_val_if_fail (GSK_IS_RENDER_NODE (node), NULL);
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g_return_val_if_fail (bounds != NULL, NULL);
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self = g_object_new (GTK_TYPE_RENDER_NODE_PAINTABLE, NULL);
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self->node = gsk_render_node_ref (node);
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self->bounds = *bounds;
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return GDK_PAINTABLE (self);
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}
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