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x11/nested: Always draw to an offscreen framebuffer

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Always draw the stage to an offscreen framebuffer when using the nested
backend, so that we more emulate things more similarly to how it works
real-world, i.e. it'll work the way whether stage views are enabled or
not.

https://bugzilla.gnome.org/show_bug.cgi?id=777732
This commit is contained in:
Jonas Ådahl
2017-03-20 17:04:45 +08:00
parent 9d914091f5
commit 93c6a869ec
3 changed files with 138 additions and 28 deletions
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129
src/backends/x11/nested/meta-renderer-x11-nested.c
View File

@@ -65,6 +65,104 @@ calculate_view_transform (MetaMonitorManager *monitor_manager,
return logical_monitor->transform;
}
static MetaRendererView *
get_legacy_view (MetaRenderer *renderer)
{
GList *views;
views = meta_renderer_get_views (renderer);
if (views)
return META_RENDERER_VIEW (views->data);
else
return NULL;
}
static CoglOffscreen *
create_offscreen (CoglContext *cogl_context,
int width,
int height)
{
CoglTexture2D *texture_2d;
CoglOffscreen *offscreen;
GError *error = NULL;
texture_2d = cogl_texture_2d_new_with_size (cogl_context, width, height);
offscreen = cogl_offscreen_new_with_texture (COGL_TEXTURE (texture_2d));
if (!cogl_framebuffer_allocate (COGL_FRAMEBUFFER (offscreen), &error))
meta_fatal ("Couldn't allocate framebuffer: %s", error->message);
return offscreen;
}
static void
meta_renderer_x11_nested_resize_legacy_view (MetaRendererX11Nested *renderer_x11_nested,
int width,
int height)
{
MetaRenderer *renderer = META_RENDERER (renderer_x11_nested);
MetaBackend *backend = meta_get_backend ();
ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend);
CoglContext *cogl_context = clutter_backend_get_cogl_context (clutter_backend);
MetaRendererView *legacy_view;
cairo_rectangle_int_t view_layout;
CoglOffscreen *fake_onscreen;
legacy_view = get_legacy_view (renderer);
clutter_stage_view_get_layout (CLUTTER_STAGE_VIEW (legacy_view),
&view_layout);
if (view_layout.width == width &&
view_layout.height == height)
return;
view_layout = (cairo_rectangle_int_t) {
.width = width,
.height = height
};
fake_onscreen = create_offscreen (cogl_context, width, height);
g_object_set (G_OBJECT (legacy_view),
"layout", &view_layout,
"framebuffer", COGL_FRAMEBUFFER (fake_onscreen),
NULL);
}
void
meta_renderer_x11_nested_ensure_legacy_view (MetaRendererX11Nested *renderer_x11_nested,
int width,
int height)
{
MetaRenderer *renderer = META_RENDERER (renderer_x11_nested);
MetaBackend *backend = meta_get_backend ();
ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend);
CoglContext *cogl_context = clutter_backend_get_cogl_context (clutter_backend);
cairo_rectangle_int_t view_layout;
CoglOffscreen *fake_onscreen;
MetaRendererView *legacy_view;
if (get_legacy_view (renderer))
{
meta_renderer_x11_nested_resize_legacy_view (renderer_x11_nested,
width, height);
return;
}
fake_onscreen = create_offscreen (cogl_context, width, height);
view_layout = (cairo_rectangle_int_t) {
.width = width,
.height = height
};
legacy_view = g_object_new (META_TYPE_RENDERER_VIEW,
"layout", &view_layout,
"framebuffer", COGL_FRAMEBUFFER (fake_onscreen),
NULL);
meta_renderer_set_legacy_view (renderer, legacy_view);
}
static MetaRendererView *
meta_renderer_x11_nested_create_view (MetaRenderer *renderer,
MetaLogicalMonitor *logical_monitor)
@@ -77,10 +175,8 @@ meta_renderer_x11_nested_create_view (MetaRenderer *renderer,
MetaMonitorTransform view_transform;
int view_scale;
int width, height;
CoglTexture2D *texture_2d;
CoglOffscreen *fake_onscreen;
CoglOffscreen *offscreen;
GError *error = NULL;
view_transform = calculate_view_transform (monitor_manager, logical_monitor);
@@ -89,26 +185,25 @@ meta_renderer_x11_nested_create_view (MetaRenderer *renderer,
else
view_scale = 1;
width = logical_monitor->rect.width * view_scale;
height = logical_monitor->rect.height * view_scale;
texture_2d = cogl_texture_2d_new_with_size (cogl_context, width, height);
fake_onscreen = cogl_offscreen_new_with_texture (COGL_TEXTURE (texture_2d));
if (!cogl_framebuffer_allocate (COGL_FRAMEBUFFER (fake_onscreen), &error))
meta_fatal ("Couldn't allocate framebuffer: %s", error->message);
if (view_transform != META_MONITOR_TRANSFORM_NORMAL)
if (meta_monitor_transform_is_rotated (view_transform))
{
texture_2d = cogl_texture_2d_new_with_size (cogl_context, width, height);
offscreen = cogl_offscreen_new_with_texture (COGL_TEXTURE (texture_2d));
if (!cogl_framebuffer_allocate (COGL_FRAMEBUFFER (offscreen), &error))
meta_fatal ("Couldn't allocate offscreen framebuffer: %s", error->message);
width = logical_monitor->rect.height;
height = logical_monitor->rect.width;
}
else
{
offscreen = NULL;
width = logical_monitor->rect.width;
height = logical_monitor->rect.height;
}
width *= view_scale;
height *= view_scale;
fake_onscreen = create_offscreen (cogl_context, width, height);
if (view_transform != META_MONITOR_TRANSFORM_NORMAL)
offscreen = create_offscreen (cogl_context, width, height);
else
offscreen = NULL;
return g_object_new (META_TYPE_RENDERER_VIEW,
"layout", &logical_monitor->rect,