566c28bdaf
Add support for drawing a stage using multiple framebuffers each making up one part of the stage. This works by the stage backend (ClutterStageWindow) providing a list of views which will be for splitting up the stage in different regions. A view layout, for now, is a set of rectangles. The stage window (i.e. stage "backend" will use this information when drawing a frame, using one framebuffer for each view. The scene graph is adapted to explictly take a view when painting the stage. It will use this view, its assigned framebuffer and layout to offset and clip the drawing accordingly. This effectively removes any notion of "stage framebuffer", since each stage now may consist of multiple framebuffers. Therefore, API involving this has been deprecated and made no-ops; namely clutter_stage_ensure_context(). Callers are now assumed to either always use a framebuffer reference explicitly, or push/pop the framebuffer of a given view where the code has not yet changed to use the explicit-buffer-using cogl API. Currently only the nested X11 backend supports this mode fully, and the per view framebuffers are all offscreen. Upon frame completion, it'll blit each view's framebuffer onto the onscreen framebuffer before swapping. Other backends (X11 CM and native/KMS) are adapted to manage a full-stage view. The X11 CM backend will continue to use this method, while the native/KMS backend will be adopted to use multiple view drawing. https://bugzilla.gnome.org/show_bug.cgi?id=768976
94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/*
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* Copyright (C) 2016 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Written by:
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* Jonas Ådahl <jadahl@gmail.com>
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*/
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#include "config.h"
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#include <glib-object.h>
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#include "backends/meta-backend-private.h"
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#include "backends/meta-renderer.h"
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#include "backends/native/meta-clutter-backend-native.h"
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#include "backends/native/meta-stage-native.h"
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#include "clutter/clutter.h"
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#include "meta/meta-backend.h"
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struct _MetaClutterBackendNative
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{
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ClutterBackendEglNative parent;
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MetaStageNative *stage_native;
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};
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G_DEFINE_TYPE (MetaClutterBackendNative, meta_clutter_backend_native,
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CLUTTER_TYPE_BACKEND_EGL_NATIVE)
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MetaStageNative *
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meta_clutter_backend_native_get_stage_native (ClutterBackend *backend)
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{
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MetaClutterBackendNative *clutter_backend_native =
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META_CLUTTER_BACKEND_NATIVE (backend);
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return clutter_backend_native->stage_native;
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}
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static CoglRenderer *
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meta_clutter_backend_native_get_renderer (ClutterBackend *clutter_backend,
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GError **error)
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{
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MetaBackend *backend = meta_get_backend ();
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MetaRenderer *renderer = meta_backend_get_renderer (backend);
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return meta_renderer_create_cogl_renderer (renderer);
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}
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static ClutterStageWindow *
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meta_clutter_backend_native_create_stage (ClutterBackend *backend,
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ClutterStage *wrapper,
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GError **error)
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{
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MetaClutterBackendNative *clutter_backend_native =
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META_CLUTTER_BACKEND_NATIVE (backend);
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g_assert (!clutter_backend_native->stage_native);
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clutter_backend_native->stage_native = g_object_new (META_TYPE_STAGE_NATIVE,
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"backend", backend,
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"wrapper", wrapper,
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NULL);
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return CLUTTER_STAGE_WINDOW (clutter_backend_native->stage_native);
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}
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static void
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meta_clutter_backend_native_init (MetaClutterBackendNative *clutter_backend_nativen)
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{
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}
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static void
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meta_clutter_backend_native_class_init (MetaClutterBackendNativeClass *klass)
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{
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ClutterBackendClass *clutter_backend_class = CLUTTER_BACKEND_CLASS (klass);
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clutter_backend_class->get_renderer = meta_clutter_backend_native_get_renderer;
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clutter_backend_class->create_stage = meta_clutter_backend_native_create_stage;
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}
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