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libweston: always use the transform matrix for coordinate conversion

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We always set it up correctly, even if transforms are disabled. The code
is simpler if we always use the matrix instead of having two cases.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2022-11-08 16:36:49 -06:00
parent 2dc8680d71
commit 8bf90010dd
1 changed files with 26 additions and 36 deletions
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62
libweston/compositor.c
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@ -649,28 +649,23 @@ WL_EXPORT void
weston_view_to_global_float(struct weston_view *view,
float sx, float sy, float *x, float *y)
{
struct weston_vector v = { { sx, sy, 0.0f, 1.0f } };
assert(!view->transform.dirty);
if (view->transform.enabled) {
struct weston_vector v = { { sx, sy, 0.0f, 1.0f } };
weston_matrix_transform(&view->transform.matrix, &v);
weston_matrix_transform(&view->transform.matrix, &v);
if (fabsf(v.f[3]) < 1e-6) {
weston_log("warning: numerical instability in "
"%s(), divisor = %g\n", __func__,
v.f[3]);
*x = 0;
*y = 0;
return;
}
*x = v.f[0] / v.f[3];
*y = v.f[1] / v.f[3];
} else {
*x = sx + view->geometry.x;
*y = sy + view->geometry.y;
if (fabsf(v.f[3]) < 1e-6) {
weston_log("warning: numerical instability in "
"%s(), divisor = %g\n", __func__,
v.f[3]);
*x = 0;
*y = 0;
return;
}
*x = v.f[0] / v.f[3];
*y = v.f[1] / v.f[3];
}
WL_EXPORT pixman_box32_t
@ -1467,28 +1462,23 @@ WL_EXPORT void
weston_view_from_global_float(struct weston_view *view,
float x, float y, float *vx, float *vy)
{
struct weston_vector v = { { x, y, 0.0f, 1.0f } };
assert(!view->transform.dirty);
if (view->transform.enabled) {
struct weston_vector v = { { x, y, 0.0f, 1.0f } };
weston_matrix_transform(&view->transform.inverse, &v);
weston_matrix_transform(&view->transform.inverse, &v);
if (fabsf(v.f[3]) < 1e-6) {
weston_log("warning: numerical instability in "
"weston_view_from_global(), divisor = %g\n",
v.f[3]);
*vx = 0;
*vy = 0;
return;
}
*vx = v.f[0] / v.f[3];
*vy = v.f[1] / v.f[3];
} else {
*vx = x - view->geometry.x;
*vy = y - view->geometry.y;
if (fabsf(v.f[3]) < 1e-6) {
weston_log("warning: numerical instability in "
"weston_view_from_global(), divisor = %g\n",
v.f[3]);
*vx = 0;
*vy = 0;
return;
}
*vx = v.f[0] / v.f[3];
*vy = v.f[1] / v.f[3];
}
WL_EXPORT void