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shell: fix matrix invertible bug in rotation handler

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While activating and deactivating rotation mechanism without moving
the pointer, rotation matrix from rotate_grab object is not being
initialised and damage shell surface rotation matrix in
rotate_grab_button handler, making it invertible.

This patch initialise rotate matrix in rotate_binding
and moves surface position check to rotate_grab_motion handler.
This commit is contained in:
Rafal Mielniczuk 2012-03-22 22:22:04 +01:00 committed by Kristian Høgsberg
parent a3aa9c9dd6
commit 2d7ab82d74
1 changed files with 23 additions and 18 deletions
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41
src/shell.c
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@ -1241,9 +1241,10 @@ rotate_grab_motion(struct wl_pointer_grab *grab,
container_of(grab, struct rotate_grab, grab);
struct wl_input_device *device = grab->input_device;
struct shell_surface *surface = rotate->surface;
GLfloat cx = 0.5f * surface->surface->geometry.width;
GLfloat cy = 0.5f * surface->surface->geometry.height;
GLfloat dx, dy;
struct weston_surface *base_surface = surface->surface;
GLfloat cx = 0.5f * base_surface->geometry.width;
GLfloat cy = 0.5f * base_surface->geometry.height;
GLfloat dx, dy, cposx, cposy, dposx, dposy;
GLfloat r;
dx = device->x - rotate->center.x;
@ -1278,6 +1279,18 @@ rotate_grab_motion(struct wl_pointer_grab *grab,
weston_matrix_init(&rotate->rotation);
}
/* We need to adjust the position of the surface
* in case it was resized in a rotated state before */
cposx = base_surface->geometry.x + cx;
cposy = base_surface->geometry.y + cy;
dposx = rotate->center.x - cposx;
dposy = rotate->center.y - cposy;
if (dposx != 0.0f || dposy != 0.0f) {
weston_surface_set_position(base_surface,
base_surface->geometry.x + dposx,
base_surface->geometry.y + dposy);
}
/* Repaint implies weston_surface_update_transform(), which
* lazily applies the damage due to rotation update.
*/
@ -1315,7 +1328,7 @@ rotate_binding(struct wl_input_device *device, uint32_t time,
(struct weston_surface *) device->pointer_focus;
struct shell_surface *surface;
struct rotate_grab *rotate;
GLfloat dx, dy, cx, cy, cposx, cposy, dposx, dposy;
GLfloat dx, dy;
GLfloat r;
if (base_surface == NULL)
@ -1361,25 +1374,17 @@ rotate_binding(struct wl_input_device *device, uint32_t time,
inverse.d[1] = -inverse.d[4];
inverse.d[5] = inverse.d[0];
weston_matrix_multiply(&surface->rotation.rotation, &inverse);
weston_matrix_init(&rotate->rotation);
rotate->rotation.d[0] = dx / r;
rotate->rotation.d[4] = -dy / r;
rotate->rotation.d[1] = -rotate->rotation.d[4];
rotate->rotation.d[5] = rotate->rotation.d[0];
} else {
weston_matrix_init(&surface->rotation.rotation);
weston_matrix_init(&rotate->rotation);
}
/* We need to adjust the position of the surface
* in case it was resized in a rotated state before */
cx = 0.5f * surface->surface->geometry.width;
cy = 0.5f * surface->surface->geometry.height;
cposx = surface->surface->geometry.x + cx;
cposy = surface->surface->geometry.y + cy;
dposx = rotate->center.x - cposx;
dposy = rotate->center.y - cposy;
if (dposx != 0 || dposy != 0) {
weston_surface_set_position(base_surface,
base_surface->geometry.x + dposx,
base_surface->geometry.y + dposy);
}
wl_input_device_set_pointer_focus(device, NULL, time, 0, 0);
}