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glx/dri2: print FPS when env var LIBGL_SHOW_FPS is 1 (v2)

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This is useful for apps which don't print FPS.
Only enabled in SwapBuffers.

v2: track state per drawable, use libGL prefix

Reviewed-by: Michel Dänzer <michel@daenzer.net>
This commit is contained in:
Marek Olšák
2012-01-04 02:09:44 +01:00
parent c77efc6bb6
commit f82d40d4b1
1 changed files with 34 additions and 1 deletions
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35
src/glx/dri2_glx.c
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@@ -43,6 +43,7 @@
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/time.h>
#include "xf86drm.h"
#include "dri2.h"
#include "dri_common.h"
@@ -90,6 +91,8 @@ struct dri2_screen {
void *driver;
int fd;
Bool show_fps;
};
struct dri2_context
@@ -108,6 +111,9 @@ struct dri2_drawable
int have_back;
int have_fake_front;
int swap_interval;
double previous_time;
unsigned frames;
};
static const struct glx_context_vtable dri2_context_vtable;
@@ -661,6 +667,26 @@ unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
}
static void show_fps(struct dri2_drawable *draw)
{
struct timeval tv;
double current_time;
gettimeofday(&tv, 0);
current_time = (double)tv.tv_sec + (double)tv.tv_usec * 0.000001;
draw->frames++;
if (draw->previous_time + 1 < current_time) {
if (draw->previous_time) {
fprintf(stderr, "libGL: FPS = %.1f\n",
draw->frames / (current_time - draw->previous_time));
}
draw->frames = 0;
draw->previous_time = current_time;
}
}
static int64_t
dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
int64_t remainder)
@@ -699,6 +725,10 @@ dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
#endif
}
if (psc->show_fps) {
show_fps(priv);
}
/* Old servers don't send invalidate events */
if (!pdp->invalidateAvailable)
dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
@@ -967,7 +997,7 @@ dri2CreateScreen(int screen, struct glx_display * priv)
struct dri2_screen *psc;
__GLXDRIscreen *psp;
struct glx_config *configs = NULL, *visuals = NULL;
char *driverName, *deviceName;
char *driverName, *deviceName, *tmp;
drm_magic_t magic;
int i;
@@ -1099,6 +1129,9 @@ dri2CreateScreen(int screen, struct glx_display * priv)
Xfree(driverName);
Xfree(deviceName);
tmp = getenv("LIBGL_SHOW_FPS");
psc->show_fps = tmp && strcmp(tmp, "1") == 0;
return &psc->base;
handle_error: