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>
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@ -179,6 +179,12 @@ Mesa EGL supports different sets of environment variables. See the
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<li>GALLIUM_HUD - draws various information on the screen, like framerate,
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cpu load, driver statistics, performance counters, etc.
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Set GALLIUM_HUD=help and run e.g. glxgears for more info.
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<li>GALLIUM_HUD_VISIBLE - control default visibility, defaults to true.
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<li>GALLIUM_HUD_TOGGLE_SIGNAL - toggle visibility via user specified signal.
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Especially useful to toggle hud at specific points of application and
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disable for unencumbered viewing the rest of the time. For example, set
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GALLIUM_HUD_VISIBLE to false and GALLIUM_HUD_SIGNAL_TOGGLE to 10 (SIGUSR1).
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Use kill -10 <pid> to toggle the hud as desired.
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<li>GALLIUM_LOG_FILE - specifies a file for logging all errors, warnings, etc.
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rather than stderr.
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<li>GALLIUM_PRINT_OPTIONS - if non-zero, print all the Gallium environment
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@ -33,6 +33,7 @@
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* Set GALLIUM_HUD=help for more info.
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*/
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#include <signal.h>
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#include <stdio.h>
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#include "hud/hud_context.h"
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@ -51,6 +52,8 @@
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#include "tgsi/tgsi_text.h"
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#include "tgsi/tgsi_dump.h"
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/* Control the visibility of all HUD contexts */
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static boolean huds_visible = TRUE;
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struct hud_context {
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struct pipe_context *pipe;
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@ -95,6 +98,11 @@ struct hud_context {
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} text, bg, whitelines;
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};
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static void
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signal_visible_handler(int sig, siginfo_t *siginfo, void *context)
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{
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huds_visible = !huds_visible;
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}
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static void
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hud_draw_colored_prims(struct hud_context *hud, unsigned prim,
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@ -441,6 +449,9 @@ hud_draw(struct hud_context *hud, struct pipe_resource *tex)
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struct hud_pane *pane;
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struct hud_graph *gr;
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if (!huds_visible)
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return;
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hud->fb_width = tex->width0;
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hud->fb_height = tex->height0;
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hud->constants.two_div_fb_width = 2.0f / hud->fb_width;
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@ -1125,6 +1136,10 @@ hud_create(struct pipe_context *pipe, struct cso_context *cso)
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struct pipe_sampler_view view_templ;
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unsigned i;
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const char *env = debug_get_option("GALLIUM_HUD", NULL);
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unsigned signo = debug_get_num_option("GALLIUM_HUD_TOGGLE_SIGNAL", 0);
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static boolean sig_handled = FALSE;
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struct sigaction action = {};
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huds_visible = debug_get_bool_option("GALLIUM_HUD_VISIBLE", TRUE);
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if (!env || !*env)
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return NULL;
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@ -1267,6 +1282,20 @@ hud_create(struct pipe_context *pipe, struct cso_context *cso)
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LIST_INITHEAD(&hud->pane_list);
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/* setup sig handler once for all hud contexts */
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if (!sig_handled && signo != 0) {
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action.sa_sigaction = &signal_visible_handler;
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action.sa_flags = SA_SIGINFO;
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if (signo >= NSIG)
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fprintf(stderr, "gallium_hud: invalid signal %u\n", signo);
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else if (sigaction(signo, &action, NULL) < 0)
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fprintf(stderr, "gallium_hud: unable to set handler for signal %u\n", signo);
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fflush(stderr);
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sig_handled = TRUE;
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}
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hud_parse_env_var(hud, env);
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return hud;
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}
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