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clutter: Remove support for transparent windows

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We're only ever a compositor, so we're never asking to be transparent.
Thus remove support for requesting to paint to GLX or EGL displays with
an alpha channel.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1364
This commit is contained in:
Jonas Ådahl 2020-07-09 20:58:20 +02:00
parent 787bc3d993
commit d857edf09c
8 changed files with 12 additions and 139 deletions
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89
clutter/clutter/x11/clutter-backend-x11.c
View File

@ -98,7 +98,6 @@ static const gchar *atom_names[] = {
/* various flags corresponding to pre init setup calls */
static gboolean clutter_enable_xinput = TRUE;
static gboolean clutter_enable_argb = FALSE;
static gboolean clutter_enable_stereo = FALSE;
static Display *_foreign_dpy = NULL;
@ -240,13 +239,6 @@ clutter_backend_x11_pre_parse (ClutterBackend *backend,
env_string = NULL;
}
env_string = g_getenv ("CLUTTER_DISABLE_ARGB_VISUAL");
if (env_string)
{
clutter_enable_argb = FALSE;
env_string = NULL;
}
env_string = g_getenv ("CLUTTER_DISABLE_XINPUT");
if (env_string)
{
@ -550,15 +542,12 @@ clutter_backend_x11_get_renderer (ClutterBackend *backend,
static gboolean
check_onscreen_template (CoglRenderer *renderer,
CoglSwapChain *swap_chain,
CoglOnscreenTemplate *onscreen_template,
gboolean enable_argb,
gboolean enable_stereo,
GError **error)
{
GError *internal_error = NULL;
cogl_swap_chain_set_has_alpha (swap_chain, enable_argb);
cogl_onscreen_template_set_stereo_enabled (onscreen_template,
clutter_enable_stereo);
@ -573,17 +562,15 @@ check_onscreen_template (CoglRenderer *renderer,
*/
if (cogl_renderer_check_onscreen_template (renderer, onscreen_template, &internal_error))
{
clutter_enable_argb = enable_argb;
clutter_enable_stereo = enable_stereo;
return TRUE;
}
else
{
if (enable_argb || enable_stereo) /* More possibilities to try */
if (enable_stereo) /* More possibilities to try */
CLUTTER_NOTE (BACKEND,
"Creation of a CoglDisplay with alpha=%s, stereo=%s failed: %s",
enable_argb ? "enabled" : "disabled",
"Creation of a CoglDisplay with, stereo=%s failed: %s",
enable_stereo ? "enabled" : "disabled",
internal_error != NULL
? internal_error->message
@ -611,8 +598,7 @@ clutter_backend_x11_get_display (ClutterBackend *backend,
CoglDisplay *display = NULL;
gboolean res = FALSE;
CLUTTER_NOTE (BACKEND, "Creating CoglDisplay, alpha=%s, stereo=%s",
clutter_enable_argb ? "enabled" : "disabled",
CLUTTER_NOTE (BACKEND, "Creating CoglDisplay, stereo=%s",
clutter_enable_stereo ? "enabled" : "disabled");
onscreen_template = cogl_onscreen_template_new (swap_chain);
@ -620,22 +606,13 @@ clutter_backend_x11_get_display (ClutterBackend *backend,
/* It's possible that the current renderer doesn't support transparency
* or doesn't support stereo, so we try the different combinations.
*/
if (clutter_enable_argb && clutter_enable_stereo)
res = check_onscreen_template (renderer, swap_chain, onscreen_template,
TRUE, TRUE, error);
/* Prioritize stereo over alpha */
if (!res && clutter_enable_stereo)
res = check_onscreen_template (renderer, swap_chain, onscreen_template,
FALSE, TRUE, error);
if (!res && clutter_enable_argb)
res = check_onscreen_template (renderer, swap_chain, onscreen_template,
TRUE, FALSE, error);
if (clutter_enable_stereo)
res = check_onscreen_template (renderer, onscreen_template,
TRUE, error);
if (!res)
res = check_onscreen_template (renderer, swap_chain, onscreen_template,
FALSE, FALSE, error);
res = check_onscreen_template (renderer, onscreen_template,
FALSE, error);
if (res)
display = cogl_display_new (renderer, onscreen_template);
@ -972,56 +949,6 @@ clutter_x11_has_composite_extension (void)
return have_composite;
}
/**
* clutter_x11_set_use_argb_visual:
* @use_argb: %TRUE if ARGB visuals should be requested by default
*
* Sets whether the Clutter X11 backend should request ARGB visuals by default
* or not.
*
* By default, Clutter requests RGB visuals.
*
* If no ARGB visuals are found, the X11 backend will fall back to
* requesting a RGB visual instead.
*
* ARGB visuals are required for the #ClutterStage:use-alpha property to work.
*
* This function can only be called once, and before clutter_init() is
* called.
*
* Since: 1.2
*/
void
clutter_x11_set_use_argb_visual (gboolean use_argb)
{
if (_clutter_context_is_initialized ())
{
g_warning ("%s() can only be used before calling clutter_init()",
G_STRFUNC);
return;
}
CLUTTER_NOTE (BACKEND, "ARGB visuals are %s",
use_argb ? "enabled" : "disabled");
clutter_enable_argb = use_argb;
}
/**
* clutter_x11_get_use_argb_visual:
*
* Retrieves whether the Clutter X11 backend is using ARGB visuals by default
*
* Return value: %TRUE if ARGB visuals are queried by default
*
* Since: 1.2
*/
gboolean
clutter_x11_get_use_argb_visual (void)
{
return clutter_enable_argb;
}
/**
* clutter_x11_set_use_stereo_stage:
* @use_stereo: %TRUE if the stereo stages should be used if possible.

5
clutter/clutter/x11/clutter-x11.h
View File

@ -112,11 +112,6 @@ void clutter_x11_remove_filter (ClutterX11FilterFunc func,
CLUTTER_EXPORT
gboolean clutter_x11_has_composite_extension (void);
CLUTTER_EXPORT
void clutter_x11_set_use_argb_visual (gboolean use_argb);
CLUTTER_EXPORT
gboolean clutter_x11_get_use_argb_visual (void);
CLUTTER_EXPORT
void clutter_x11_set_use_stereo_stage (gboolean use_stereo);
CLUTTER_EXPORT

2
cogl/cogl/cogl-swap-chain-private.h
View File

@ -37,8 +37,6 @@ struct _CoglSwapChain
{
CoglObject _parent;
gboolean has_alpha;
int length;
};

7
cogl/cogl/cogl-swap-chain.c
View File

@ -59,13 +59,6 @@ cogl_swap_chain_new (void)
return _cogl_swap_chain_object_new (swap_chain);
}
void
cogl_swap_chain_set_has_alpha (CoglSwapChain *swap_chain,
gboolean has_alpha)
{
swap_chain->has_alpha = has_alpha;
}
void
cogl_swap_chain_set_length (CoglSwapChain *swap_chain,
int length)

1
cogl/cogl/winsys/cogl-glx-display-private.h
View File

@ -50,7 +50,6 @@ typedef struct _CoglGLXDisplay
CoglGLXCachedConfig glx_cached_configs[COGL_GLX_N_CACHED_CONFIGS];
gboolean found_fbconfig;
gboolean fbconfig_has_rgba_visual;
gboolean is_direct;
gboolean have_vblank_counter;
gboolean can_vblank_wait;

2
cogl/cogl/winsys/cogl-winsys-egl.c
View File

@ -223,7 +223,7 @@ egl_attributes_from_framebuffer_config (CoglDisplay *display,
attributes[i++] = 1;
attributes[i++] = EGL_ALPHA_SIZE;
attributes[i++] = config->swap_chain->has_alpha ? 1 : EGL_DONT_CARE;
attributes[i++] = EGL_DONT_CARE;
attributes[i++] = EGL_DEPTH_SIZE;
attributes[i++] = 1;

41
cogl/cogl/winsys/cogl-winsys-glx.c
View File

@ -885,7 +885,7 @@ glx_attributes_from_framebuffer_config (CoglDisplay *display,
attributes[i++] = GLX_BLUE_SIZE;
attributes[i++] = 1;
attributes[i++] = GLX_ALPHA_SIZE;
attributes[i++] = config->swap_chain->has_alpha ? 1 : GLX_DONT_CARE;
attributes[i++] = GLX_DONT_CARE;
attributes[i++] = GLX_DEPTH_SIZE;
attributes[i++] = 1;
attributes[i++] = GLX_STENCIL_SIZE;
@ -944,40 +944,8 @@ find_fbconfig (CoglDisplay *display,
goto done;
}
if (config->swap_chain->has_alpha)
{
int i;
for (i = 0; i < n_configs; i++)
{
XVisualInfo *vinfo;
vinfo = glx_renderer->glXGetVisualFromFBConfig (xlib_renderer->xdpy,
configs[i]);
if (vinfo == NULL)
continue;
if (vinfo->depth == 32 &&
(vinfo->red_mask | vinfo->green_mask | vinfo->blue_mask)
!= 0xffffffff)
{
COGL_NOTE (WINSYS, "Found an ARGB FBConfig [index:%d]", i);
*config_ret = configs[i];
goto done;
}
}
g_set_error_literal (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_CONTEXT,
"Unable to find fbconfig with rgba visual");
ret = FALSE;
goto done;
}
else
{
COGL_NOTE (WINSYS, "Using the first available FBConfig");
*config_ret = configs[0];
}
COGL_NOTE (WINSYS, "Using the first available FBConfig");
*config_ret = configs[0];
done:
XFree (configs);
@ -1059,8 +1027,6 @@ create_context (CoglDisplay *display, GError **error)
CoglXlibRenderer *xlib_renderer =
_cogl_xlib_renderer_get_data (display->renderer);
CoglGLXRenderer *glx_renderer = display->renderer->winsys;
gboolean support_transparent_windows =
display->onscreen_template->config.swap_chain->has_alpha;
GLXFBConfig config;
GError *fbconfig_error = NULL;
XSetWindowAttributes attrs;
@ -1084,7 +1050,6 @@ create_context (CoglDisplay *display, GError **error)
}
glx_display->fbconfig = config;
glx_display->fbconfig_has_rgba_visual = support_transparent_windows;
COGL_NOTE (WINSYS, "Creating GLX Context (display: %p)",
xlib_renderer->xdpy);

4
src/tests/clutter/interactive/test-paint-wrapper.c
View File

@ -212,10 +212,6 @@ test_paint_wrapper_main (int argc, char *argv[])
error = NULL;
#ifdef CLUTTER_WINDOWING_X11
clutter_x11_set_use_argb_visual (TRUE);
#endif
if (clutter_init_with_args (&argc, &argv,
NULL,
super_oh_entries,