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clients/simple-egl: Add a vertical bar mode 

Add an animation that moves a vertical bar from left to right. This is
nice for testing the tearing extension.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2022-11-28 13:54:38 -06:00
parent 5191113638
commit 030edb5c48
1 changed files with 66 additions and 3 deletions
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69
clients/simple-egl.c
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@ -113,6 +113,7 @@ struct window {
int fullscreen, maximized, opaque, buffer_bpp, frame_sync, delay;
struct wp_tearing_control_v1 *tear_control;
bool tearing, toggled_tearing, tear_enabled;
bool vertical_bar;
bool fullscreen_ratio;
bool wait_for_configure;
@ -595,6 +596,57 @@ draw_triangle(struct window *window, EGLint buffer_age)
}
}
static void
draw_bar(struct window *window, EGLint buffer_age, struct weston_matrix *rotation)
{
struct display *display = window->display;
GLfloat verts[4][2] = {
{ -1, 1 },
{ -0.9, 1 },
{ -1, -1 },
{ -0.9, -1 }
};
static const GLfloat colors[4][3] = {
{ 1, 1, 1 },
{ 1, 1, 1 },
{ 1, 1, 1 },
{ 1, 1, 1 }
};
struct wl_region *region;
int i;
const float delta = 0.01;
static float offset = 0;
offset += delta;
if (offset > 2)
offset = 0;
for (i = 0 ; i < 4; i++) {
verts[i][0] += offset;
}
glVertexAttribPointer(window->gl.pos, 2, GL_FLOAT, GL_FALSE, 0, verts);
glVertexAttribPointer(window->gl.col, 3, GL_FLOAT, GL_FALSE, 0, colors);
glEnableVertexAttribArray(window->gl.pos);
glEnableVertexAttribArray(window->gl.col);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableVertexAttribArray(window->gl.pos);
glDisableVertexAttribArray(window->gl.col);
usleep(window->delay);
if (window->opaque || window->fullscreen) {
region = wl_compositor_create_region(window->display->compositor);
wl_region_add(region, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_set_opaque_region(window->surface, region);
wl_region_destroy(region);
} else {
wl_surface_set_opaque_region(window->surface, NULL);
}
eglSwapBuffers(display->egl.dpy, window->egl_surface);
}
static void
set_tearing(struct window *window, bool enable)
{
@ -723,7 +775,12 @@ redraw(struct window *window)
}
weston_matrix_init(&rotation);
angle = ((time - window->initial_frame_time) / speed_div) % 360 * M_PI / 180.0;
if (window->vertical_bar) {
angle = 0;
} else {
angle = ((time - window->initial_frame_time) / speed_div)
% 360 * M_PI / 180.0;
}
rotation.d[0] = cos(angle);
rotation.d[2] = sin(angle);
rotation.d[8] = -sin(angle);
@ -774,7 +831,10 @@ redraw(struct window *window)
glClearColor(0.0, 0.0, 0.0, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
draw_triangle(window, buffer_age);
if (window->vertical_bar)
draw_bar(window, buffer_age, &rotation);
else
draw_triangle(window, buffer_age);
window->frames++;
}
@ -1160,6 +1220,7 @@ usage(int error_code)
" -b\tDon't sync to compositor redraw (eglSwapInterval 0)\n"
" -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"
" -h\tThis help text\n\n");
exit(error_code);
@ -1209,7 +1270,9 @@ main(int argc, char **argv)
} else if (strcmp("-T", argv[i]) == 0) {
window.tearing = true;
window.toggled_tearing = true;
} else if (strcmp("-h", argv[i]) == 0)
} else if (strcmp("-v", argv[i]) == 0)
window.vertical_bar = true;
else if (strcmp("-h", argv[i]) == 0)
usage(EXIT_SUCCESS);
else
usage(EXIT_FAILURE);