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gallium/hud: control visibility at startup and runtime. 

- env GALLIUM_HUD_VISIBLE: control default visibility
- env GALLIUM_HUD_SIGNAL_TOGGLE: toggle visibility via signal

Signed-off-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Jimmy Berry 2015-11-09 23:20:37 -06:00 committed by Marek Olšák
parent 0bee3acc2a
commit 56a1c10bb8
2 changed files with 35 additions and 0 deletions
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6
docs/envvars.html
View File

@ -179,6 +179,12 @@ Mesa EGL supports different sets of environment variables. See the
<li>GALLIUM_HUD - draws various information on the screen, like framerate,
cpu load, driver statistics, performance counters, etc.
Set GALLIUM_HUD=help and run e.g. glxgears for more info.
<li>GALLIUM_HUD_VISIBLE - control default visibility, defaults to true.
<li>GALLIUM_HUD_TOGGLE_SIGNAL - toggle visibility via user specified signal.
Especially useful to toggle hud at specific points of application and
disable for unencumbered viewing the rest of the time. For example, set
GALLIUM_HUD_VISIBLE to false and GALLIUM_HUD_SIGNAL_TOGGLE to 10 (SIGUSR1).
Use kill -10 <pid> to toggle the hud as desired.
<li>GALLIUM_LOG_FILE - specifies a file for logging all errors, warnings, etc.
rather than stderr.
<li>GALLIUM_PRINT_OPTIONS - if non-zero, print all the Gallium environment

29
src/gallium/auxiliary/hud/hud_context.c
View File

@ -33,6 +33,7 @@
* Set GALLIUM_HUD=help for more info.
*/
#include <signal.h>
#include <stdio.h>
#include "hud/hud_context.h"
@ -51,6 +52,8 @@
#include "tgsi/tgsi_text.h"
#include "tgsi/tgsi_dump.h"
/* Control the visibility of all HUD contexts */
static boolean huds_visible = TRUE;
struct hud_context {
struct pipe_context *pipe;
@ -95,6 +98,11 @@ struct hud_context {
} text, bg, whitelines;
};
static void
signal_visible_handler(int sig, siginfo_t *siginfo, void *context)
{
huds_visible = !huds_visible;
}
static void
hud_draw_colored_prims(struct hud_context *hud, unsigned prim,
@ -441,6 +449,9 @@ hud_draw(struct hud_context *hud, struct pipe_resource *tex)
struct hud_pane *pane;
struct hud_graph *gr;
if (!huds_visible)
return;
hud->fb_width = tex->width0;
hud->fb_height = tex->height0;
hud->constants.two_div_fb_width = 2.0f / hud->fb_width;
@ -1125,6 +1136,10 @@ hud_create(struct pipe_context *pipe, struct cso_context *cso)
struct pipe_sampler_view view_templ;
unsigned i;
const char *env = debug_get_option("GALLIUM_HUD", NULL);
unsigned signo = debug_get_num_option("GALLIUM_HUD_TOGGLE_SIGNAL", 0);
static boolean sig_handled = FALSE;
struct sigaction action = {};
huds_visible = debug_get_bool_option("GALLIUM_HUD_VISIBLE", TRUE);
if (!env || !*env)
return NULL;
@ -1267,6 +1282,20 @@ hud_create(struct pipe_context *pipe, struct cso_context *cso)
LIST_INITHEAD(&hud->pane_list);
/* setup sig handler once for all hud contexts */
if (!sig_handled && signo != 0) {
action.sa_sigaction = &signal_visible_handler;
action.sa_flags = SA_SIGINFO;
if (signo >= NSIG)
fprintf(stderr, "gallium_hud: invalid signal %u\n", signo);
else if (sigaction(signo, &action, NULL) < 0)
fprintf(stderr, "gallium_hud: unable to set handler for signal %u\n", signo);
fflush(stderr);
sig_handled = TRUE;
}
hud_parse_env_var(hud, env);
return hud;
}