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compositor: enable loading multiple backends

Browse source 
Add a new --backends command line option and a backends option to the
configuration file that both take a comma-separated list of backends,
similar to the modules option.
The first backend is the primary backend and provides the renderer.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Philipp Zabel 2021-02-16 12:25:38 +01:00 committed by Derek Foreman
parent 69679b271f
commit efe9707ef2
1 changed files with 43 additions and 9 deletions
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52
compositor/main.c
View file

@ -676,6 +676,7 @@ usage(int error_code)
#if defined(BUILD_X11_COMPOSITOR)
"\t\t\t\tx11\n"
#endif
" --backends\t\tLoad the comma-separated list of backends\n"
" --renderer=NAME\tRenderer to use, one of\n"
"\t\t\t\tauto\tAutomatic selection of one of the below renderers\n"
#if defined(ENABLE_EGL)
@ -3841,6 +3842,33 @@ load_backend(struct weston_compositor *compositor, const char *name,
}
}
static int
load_backends(struct weston_compositor *ec, const char *backends,
int *argc, char *argv[], struct weston_config *config,
const char *renderer)
{
const char *p, *end;
char buffer[256];
if (backends == NULL)
return 0;
p = backends;
while (*p) {
end = strchrnul(p, ',');
snprintf(buffer, sizeof buffer, "%.*s", (int) (end - p), p);
if (load_backend(ec, buffer, argc, argv, config, renderer) < 0)
return -1;
p = end;
while (*p == ',')
p++;
}
return 0;
}
static char *
copy_command_line(int argc, char * const argv[])
{
@ -3982,7 +4010,7 @@ wet_main(int argc, char *argv[], const struct weston_testsuite_data *test_data)
struct wl_event_source *signals[3];
struct wl_event_loop *loop;
int i, fd;
char *backend = NULL;
char *backends = NULL;
char *renderer = NULL;
char *shell = NULL;
bool xwayland = false;
@ -4019,7 +4047,8 @@ wet_main(int argc, char *argv[], const struct weston_testsuite_data *test_data)
struct wl_protocol_logger *protologger = NULL;
const struct weston_option core_options[] = {
{ WESTON_OPTION_STRING, "backend", 'B', &backend },
{ WESTON_OPTION_STRING, "backend", 'B', &backends },
{ WESTON_OPTION_STRING, "backends", 0, &backends },
{ WESTON_OPTION_STRING, "renderer", 0, &renderer },
{ WESTON_OPTION_STRING, "shell", 0, &shell },
{ WESTON_OPTION_STRING, "socket", 'S', &socket_name },
@ -4161,11 +4190,15 @@ wet_main(int argc, char *argv[], const struct weston_testsuite_data *test_data)
&renderer, NULL);
}
if (!backend) {
weston_config_section_get_string(section, "backend", &backend,
if (!backends) {
weston_config_section_get_string(section, "backends", &backends,
NULL);
if (!backend)
backend = weston_choose_default_backend();
if (!backends) {
weston_config_section_get_string(section, "backend",
&backends, NULL);
if (!backends)
backends = weston_choose_default_backend();
}
}
wet.compositor = weston_compositor_create(display, log_ctx, &wet, test_data);
@ -4209,8 +4242,9 @@ wet_main(int argc, char *argv[], const struct weston_testsuite_data *test_data)
free(require_outputs);
}
if (load_backend(wet.compositor, backend, &argc, argv, config,
renderer) < 0) {
wet.compositor->multi_backend = backends && strchr(backends, ',');
if (load_backends(wet.compositor, backends, &argc, argv, config,
renderer) < 0) {
weston_log("fatal: failed to create compositor backend\n");
goto out;
}
@ -4364,7 +4398,7 @@ out_display:
if (config)
weston_config_destroy(config);
free(config_file);
free(backend);
free(backends);
free(renderer);
free(shell);
free(socket_name);