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clients/simple-egl: Allow setting the swapinterval

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eglSwapInterval() is intended to allow capping the frame rate to a divisor
of the display rate. This may not work if the GL library simple-egl is
using doesn't support it well.

It's still useful to test, so add a way to set it.

Signed-off-by: Derek Foreman <derekf.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2023-12-06 11:21:56 -06:00
parent a5c5702112
commit 128a461b8f
1 changed files with 7 additions and 5 deletions
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12
clients/simple-egl.c
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@ -115,7 +115,7 @@ struct window {
struct xdg_surface *xdg_surface;
struct xdg_toplevel *xdg_toplevel;
EGLSurface egl_surface;
int fullscreen, maximized, opaque, buffer_bpp, frame_sync, delay;
int fullscreen, maximized, opaque, buffer_bpp, interval, delay;
struct wp_tearing_control_v1 *tear_control;
struct wp_viewport *viewport;
struct wp_fractional_scale_v1 *fractional_scale_obj;
@ -443,8 +443,7 @@ init_gl(struct window *window)
window->egl_surface, window->display->egl.ctx);
assert(ret == EGL_TRUE);
if (!window->frame_sync)
eglSwapInterval(window->display->egl.dpy, 0);
eglSwapInterval(window->display->egl.dpy, window->interval);
frag = create_shader(window, frag_shader_text, GL_FRAGMENT_SHADER);
vert = create_shader(window, vert_shader_text, GL_VERTEX_SHADER);
@ -1295,6 +1294,7 @@ usage(int error_code)
" -t\tEnable tearing via the tearing_control protocol\n"
" -T\tEnable and disable tearing every 5 seconds\n"
" -v\tDraw a moving vertical bar instead of a triangle\n"
" -i <interval> \tSet eglSwapInterval to interval\n"
" -h\tThis help text\n\n");
exit(error_code);
@ -1317,7 +1317,7 @@ main(int argc, char **argv)
window.buffer_transform = WL_OUTPUT_TRANSFORM_NORMAL;
window.needs_buffer_geometry_update = false;
window.buffer_bpp = 0;
window.frame_sync = 1;
window.interval = 1;
window.delay = 0;
window.fullscreen_ratio = false;
@ -1338,7 +1338,7 @@ main(int argc, char **argv)
else if (strcmp("-s", argv[i]) == 0)
window.buffer_bpp = 16;
else if (strcmp("-b", argv[i]) == 0)
window.frame_sync = 0;
window.interval = 0;
else if (strcmp("-t", argv[i]) == 0) {
window.tearing = true;
} else if (strcmp("-T", argv[i]) == 0) {
@ -1346,6 +1346,8 @@ main(int argc, char **argv)
window.toggled_tearing = true;
} else if (strcmp("-v", argv[i]) == 0)
window.vertical_bar = true;
else if (strcmp("-i", argv[i]) == 0)
window.interval = atoi(argv[++i]);
else if (strcmp("-h", argv[i]) == 0)
usage(EXIT_SUCCESS);
else