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8c6e5ca131
If the texture covers all of the black background (like when watching a 1080p stream fullscreen on a 1080p monitor) we don't need a compositor with single pixel support. Fixes offloading in Kwin.
382 lines
12 KiB
C
382 lines
12 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 2023 Red Hat, Inc.
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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 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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#include "config.h"
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#include "gdksubsurfaceprivate.h"
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#include "gdksurfaceprivate.h"
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#include "gdktexture.h"
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#include "gsk/gskrectprivate.h"
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G_DEFINE_TYPE (GdkSubsurface, gdk_subsurface, G_TYPE_OBJECT)
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static void
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gdk_subsurface_init (GdkSubsurface *self)
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{
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}
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static void remove_subsurface (GdkSubsurface *subsurface);
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static void
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gdk_subsurface_finalize (GObject *object)
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{
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GdkSubsurface *subsurface = GDK_SUBSURFACE (object);
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remove_subsurface (subsurface);
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g_ptr_array_remove (subsurface->parent->subsurfaces, subsurface);
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g_clear_object (&subsurface->parent);
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G_OBJECT_CLASS (gdk_subsurface_parent_class)->finalize (object);
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}
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static void
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gdk_subsurface_class_init (GdkSubsurfaceClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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object_class->finalize = gdk_subsurface_finalize;
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}
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/*< private >
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* gdk_subsurface_get_parent:
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* @subsurface: a `GdkSubsurface`
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*
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* Returns the parent surface of @subsurface.
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*
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* Returns: the parent surface
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*/
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GdkSurface *
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gdk_subsurface_get_parent (GdkSubsurface *subsurface)
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{
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g_return_val_if_fail (GDK_IS_SUBSURFACE (subsurface), NULL);
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return subsurface->parent;
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}
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static void
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remove_subsurface (GdkSubsurface *subsurface)
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{
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GdkSurface *parent = subsurface->parent;
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if (parent->subsurfaces_above == subsurface)
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parent->subsurfaces_above = subsurface->sibling_above;
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if (parent->subsurfaces_below == subsurface)
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parent->subsurfaces_below = subsurface->sibling_below;
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if (subsurface->sibling_above)
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subsurface->sibling_above->sibling_below = subsurface->sibling_below;
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if (subsurface->sibling_below)
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subsurface->sibling_below->sibling_above = subsurface->sibling_above;
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subsurface->sibling_above = NULL;
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subsurface->sibling_below = NULL;
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}
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static void
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insert_subsurface (GdkSubsurface *subsurface,
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gboolean above,
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GdkSubsurface *sibling)
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{
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GdkSurface *parent = subsurface->parent;
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subsurface->above_parent = sibling->above_parent;
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if (above)
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{
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subsurface->sibling_above = sibling->sibling_above;
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sibling->sibling_above = subsurface;
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subsurface->sibling_below = sibling;
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if (subsurface->sibling_above)
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subsurface->sibling_above->sibling_below = subsurface;
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if (parent->subsurfaces_below == sibling)
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parent->subsurfaces_below = subsurface;
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}
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else
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{
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subsurface->sibling_below = sibling->sibling_below;
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sibling->sibling_below = subsurface;
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subsurface->sibling_above = sibling;
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if (subsurface->sibling_below)
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subsurface->sibling_below->sibling_above = subsurface;
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if (parent->subsurfaces_above == sibling)
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parent->subsurfaces_above = subsurface;
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}
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}
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/*< private >
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* gdk_subsurface_attach:
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* @subsurface: the `GdkSubsurface`
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* @texture: the texture to attach. This typically has to be a `GdkDmabufTexture`
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* @source: the source rectangle (i.e. the subset of the texture) to display
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* @dest: the dest rectangle, in application pixels, relative to the parent surface.
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* It must be integral in application and device pixels, or attaching will fail
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* @transform: the transform to apply to the texture contents before displaying
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* @background: (nullable): the background rectangle, in application pixels relative
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* to the parent surface. This tells GDK to put a black background of this
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* size below the subsurface. It must be integral in application and device pixels,
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* or attaching will fail
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* @above: whether the subsurface should be above its sibling
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* @sibling: (nullable): the sibling subsurface to stack relative to, or `NULL` to
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* stack relative to the parent surface
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*
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* Attaches content to a subsurface.
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*
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* This function takes all the necessary arguments to determine the subsurface
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* configuration, including its position, size, content, background and stacking.
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*
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* Returns: `TRUE` if the attaching succeeded
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*/
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gboolean
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gdk_subsurface_attach (GdkSubsurface *subsurface,
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GdkTexture *texture,
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const graphene_rect_t *source,
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const graphene_rect_t *dest,
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GdkDihedral transform,
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const graphene_rect_t *background,
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gboolean above,
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GdkSubsurface *sibling)
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{
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GdkSurface *parent = subsurface->parent;
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gboolean result;
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g_return_val_if_fail (GDK_IS_SUBSURFACE (subsurface), FALSE);
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g_return_val_if_fail (GDK_IS_TEXTURE (texture), FALSE);
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g_return_val_if_fail (source != NULL &&
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gsk_rect_contains_rect (&GRAPHENE_RECT_INIT (0, 0,
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gdk_dihedral_swaps_xy (transform) ? gdk_texture_get_height (texture) : gdk_texture_get_width (texture),
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gdk_dihedral_swaps_xy (transform) ? gdk_texture_get_width (texture) : gdk_texture_get_height (texture)),
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source), FALSE);
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g_return_val_if_fail (dest != NULL, FALSE);
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g_return_val_if_fail (sibling != subsurface, FALSE);
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g_return_val_if_fail (sibling == NULL || GDK_IS_SUBSURFACE (sibling), FALSE);
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g_return_val_if_fail (sibling == NULL || sibling->parent == subsurface->parent, FALSE);
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/* if the texture fully covers the background, ignore it */
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if (background &&
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gsk_rect_contains_rect (dest, background) &&
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gdk_memory_format_alpha (gdk_texture_get_format (texture)) == GDK_MEMORY_ALPHA_OPAQUE)
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background = NULL;
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result = GDK_SUBSURFACE_GET_CLASS (subsurface)->attach (subsurface,
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texture,
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source,
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dest,
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transform,
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background,
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above,
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sibling);
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remove_subsurface (subsurface);
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if (sibling)
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{
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insert_subsurface (subsurface, above, sibling);
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}
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else
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{
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sibling = above ? parent->subsurfaces_above : parent->subsurfaces_below;
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if (sibling)
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{
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insert_subsurface (subsurface, !above, sibling);
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}
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else
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{
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subsurface->above_parent = above;
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if (above)
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parent->subsurfaces_above = subsurface;
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else
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parent->subsurfaces_below = subsurface;
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}
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}
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return result;
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}
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/*< private >
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* gdk_subsurface_detach:
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* @subsurface: a `GdkSubsurface`
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*
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* Hides the subsurface.
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*
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* To show it again, you need to call gdk_subsurface_attach().
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*/
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void
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gdk_subsurface_detach (GdkSubsurface *subsurface)
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{
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g_return_if_fail (GDK_IS_SUBSURFACE (subsurface));
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remove_subsurface (subsurface);
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GDK_SUBSURFACE_GET_CLASS (subsurface)->detach (subsurface);
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}
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/*< private >
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* gdk_subsurface_get_texture:
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* @subsurface: a `GdkSubsurface`
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*
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* Gets the texture that is currently displayed by the subsurface.
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*
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* Returns: (nullable): the texture that is displayed
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*/
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GdkTexture *
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gdk_subsurface_get_texture (GdkSubsurface *subsurface)
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{
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g_return_val_if_fail (GDK_IS_SUBSURFACE (subsurface), NULL);
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return GDK_SUBSURFACE_GET_CLASS (subsurface)->get_texture (subsurface);
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}
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/*< private >
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* gdk_subsurface_get_source_rect:
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* @subsurface: a `GdkSubsurface`
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* @rect: (out caller-allocates): return location for the rectangle
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*
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* Returns the source rect that was specified in the most recent
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* gdk_subsurface_attach() call for @subsurface.
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*/
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void
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gdk_subsurface_get_source_rect (GdkSubsurface *subsurface,
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graphene_rect_t *rect)
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{
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g_return_if_fail (GDK_IS_SUBSURFACE (subsurface));
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g_return_if_fail (rect != NULL);
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GDK_SUBSURFACE_GET_CLASS (subsurface)->get_source_rect (subsurface, rect);
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}
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/*< private >
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* gdk_subsurface_get_texture_rect:
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* @subsurface: a `GdkSubsurface`
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* @rect: (out caller-allocates): return location for the rectangle
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*
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* Returns the texture rect that was specified in the most recent
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* gdk_subsurface_attach() call for @subsurface.
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*/
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void
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gdk_subsurface_get_texture_rect (GdkSubsurface *subsurface,
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graphene_rect_t *rect)
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{
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g_return_if_fail (GDK_IS_SUBSURFACE (subsurface));
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g_return_if_fail (rect != NULL);
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GDK_SUBSURFACE_GET_CLASS (subsurface)->get_texture_rect (subsurface, rect);
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}
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/*< private >
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* gdk_subsurface_is_above_parent:
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* @subsurface: a `GdkSubsurface`
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*
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* Returns whether the subsurface is above the parent surface
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* or below. Note that a subsurface can be above its parent
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* surface, and still be covered by sibling subsurfaces.
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*
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* Returns: `TRUE` if @subsurface is above its parent
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*/
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gboolean
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gdk_subsurface_is_above_parent (GdkSubsurface *subsurface)
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{
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g_return_val_if_fail (GDK_IS_SUBSURFACE (subsurface), FALSE);
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return subsurface->above_parent;
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}
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/*< private>
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* gdk_subsurface_get_sibling:
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* @subsurface: the `GdkSubsurface`
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* @above: whether to get the subsurface above
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*
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* Returns the subsurface above (or below) @subsurface in
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* the stacking order.
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*
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* Returns: the sibling, or `NULL` if there is none.
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*/
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GdkSubsurface *
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gdk_subsurface_get_sibling (GdkSubsurface *subsurface,
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gboolean above)
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{
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g_return_val_if_fail (GDK_IS_SUBSURFACE (subsurface), NULL);
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if (above)
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return subsurface->sibling_above;
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else
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return subsurface->sibling_below;
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}
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/*< private >
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* gdk_subsurface_get_transform:
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* @subsurface: a `GdkSubsurface`
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*
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* Returns the transform that was specified in the most recent call to
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* gdk_subsurface_attach() call for @subsurface.
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*
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* Returns: the transform
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*/
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GdkDihedral
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gdk_subsurface_get_transform (GdkSubsurface *subsurface)
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{
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g_return_val_if_fail (GDK_IS_SUBSURFACE (subsurface), GDK_DIHEDRAL_NORMAL);
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return GDK_SUBSURFACE_GET_CLASS (subsurface)->get_transform (subsurface);
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}
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/*< private >
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* gdk_subsurface_get_background_rect:
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* @subsurface: a `GdkSubsurface`
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* @rect: (out caller-allocates): return location for the rectangle
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*
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* Obtains the background rect that was specified in the most recent
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* gdk_subsurface_attach() call for @subsurface.
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*
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* Returns: `TRUE` if @subsurface has a background
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*/
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gboolean
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gdk_subsurface_get_background_rect (GdkSubsurface *subsurface,
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graphene_rect_t *rect)
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{
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g_return_val_if_fail (GDK_IS_SUBSURFACE (subsurface), FALSE);
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g_return_val_if_fail (rect != NULL, FALSE);
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return GDK_SUBSURFACE_GET_CLASS (subsurface)->get_background_rect (subsurface, rect);
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}
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/*< private >
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* gdk_subsurface_get_bounds:
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* @subsurface: a `GdkSubsurface`
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* @bounds: (out caller-allocates): return location for the bounds
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*
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* Returns the bounds of the subsurface.
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*
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* The bounds are the union of the texture and background rects.
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*/
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void
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gdk_subsurface_get_bounds (GdkSubsurface *subsurface,
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graphene_rect_t *bounds)
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{
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graphene_rect_t background;
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g_return_if_fail (GDK_IS_SUBSURFACE (subsurface));
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g_return_if_fail (bounds != NULL);
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gdk_subsurface_get_texture_rect (subsurface, bounds);
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if (gdk_subsurface_get_background_rect (subsurface, &background))
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graphene_rect_union (bounds, &background, bounds);
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}
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