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hildon-desktop/src/util/hd-util.c

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#include "hd-atoms.h"
#include "hd-util.h"
#include <matchbox/core/mb-wm.h>
#include <clutter/x11/clutter-x11.h>
#include <cogl/cogl.h>
#include <X11/Xlib.h>
#include <X11/extensions/Xrandr.h>
#include <X11/extensions/Xcomposite.h>
#include "hd-comp-mgr.h"
#include "hd-wm.h"
#include "hd-note.h"
#include "hd-transition.h"
#include "hd-render-manager.h"
#include <gdk/gdk.h>
/* whether our display width < height, not accounting for any rotation */
static int display_is_portrait = -1;
static int initially_rotated = -1;
void *
hd_util_get_win_prop_data_and_validate (Display *xdpy,
Window xwin,
Atom prop,
Atom type,
gint expected_format,
gint expected_n_items,
gint *n_items_ret)
{
Atom type_ret;
int format_ret;
unsigned long items_ret;
unsigned long after_ret;
unsigned char *prop_data;
int status;
prop_data = NULL;
/* We don't care about X errors here, because they will be reported
* in the return value. */
mb_wm_util_async_trap_x_errors (xdpy);
status = XGetWindowProperty (xdpy,
xwin,
prop,
0, G_MAXLONG,
False,
type,
&type_ret,
&format_ret,
&items_ret,
&after_ret,
&prop_data);
mb_wm_util_async_untrap_x_errors ();
if (status != Success || prop_data == NULL)
goto fail;
if (expected_format && format_ret != expected_format)
goto fail;
if (expected_n_items && items_ret != expected_n_items)
goto fail;
if (n_items_ret)
*n_items_ret = items_ret;
return prop_data;
fail:
if (prop_data)
XFree(prop_data);
return NULL;
}
/* Returns the value of a #HdWm string property of @xwin or %NULL
* if the window doesn't have such property or it can't be retrieved.
* If the return value is not %NULL it must be XFree()d by the caller. */
char *
hd_util_get_x_window_string_property (MBWindowManager *wm, Window xwin,
HdAtoms atom_id)
{
Atom type;
int format, ret;
unsigned char *value;
unsigned long items, left;
/* The return @type is %None if the property is missing. */
ret = XGetWindowProperty (wm->xdpy, xwin,
hd_comp_mgr_get_atom (HD_COMP_MGR (wm->comp_mgr),
atom_id),
0, 999, False, XA_STRING, &type, &format,
&items, &left, &value);
if (ret != Success)
g_warning ("%s: XGetWindowProperty(0x%lx, 0x%x): failed (%d)",
__FUNCTION__, xwin, atom_id, ret);
return ret != Success || type == None ? NULL : (char *)value;
}
static void
hd_util_modal_blocker_release_handler (XButtonEvent *xev,
void *userdata)
{
MBWindowManagerClient *c = userdata;
g_debug ("%s: c %p\n", __FUNCTION__, c);
if (mb_wm_client_is_map_confirmed (c) && c->cm_client)
{
ClutterActor *actor = mb_wm_comp_mgr_clutter_client_get_actor(
MB_WM_COMP_MGR_CLUTTER_CLIENT(c->cm_client));
if (actor)
{
int x, y;
unsigned int h, w;
w = h = x = y = 0;
clutter_actor_get_size (actor, &w, &h);
clutter_actor_get_position (actor, &x, &y);
if (xev->x < x || xev->x > x + w || xev->y < y || xev->y > y + h)
mb_wm_client_deliver_delete (c);
else
g_debug ("%s: ignoring ButtonRelease because "
"it happened on top of the window\n", __func__);
}
}
else
g_debug ("%s: ignoring ButtonRelease because "
"window for this blocker is not mapped yet\n", __func__);
}
static void
hd_util_modal_blocker_release_handler_for_ping (XButtonEvent *xev,
void *userdata)
{
MBWindowManagerClient *c = userdata;
g_debug ("%s: c %p", __FUNCTION__, c);
mb_wm_client_ping_start (c);
}
/* Creates a fullscreen modal blocker window for @client that closes it
* when clicked. Returns a matchbox callback ID you should deregister
* when @client is destroyed. */
unsigned long
hd_util_modal_blocker_realize(MBWindowManagerClient *client,
gboolean ping_only)
{
MBWindowManager *wm = client->wmref;
unsigned long handler;
/* Movedd from hd-dialog.c */
if (!client->xwin_modal_blocker)
{
XSetWindowAttributes attr;
attr.override_redirect = True;
attr.event_mask = MBWMChildMask|ButtonPressMask|ButtonReleaseMask|
ExposureMask;
/* Create a WIDTHxWIDTH large blocker because we may enter
* portrait mode unexpectedly. */
client->xwin_modal_blocker =
XCreateWindow (wm->xdpy,
wm->root_win->xwindow,
0, 0,
HD_COMP_MGR_LANDSCAPE_WIDTH,
HD_COMP_MGR_LANDSCAPE_WIDTH,
0,
CopyFromParent,
InputOnly,
CopyFromParent,
CWOverrideRedirect|CWEventMask,
&attr);
mb_wm_rename_window (wm, client->xwin_modal_blocker, "hdmodalblocker");
g_debug ("%s: created modal blocker %lx", __FUNCTION__, client->xwin_modal_blocker);
}
else
{
/* make sure ButtonRelease is caught */
XWindowAttributes attrs = { 0 };
XGetWindowAttributes (wm->xdpy, client->xwin_modal_blocker, &attrs);
attrs.your_event_mask |= ButtonReleaseMask;
XSelectInput (wm->xdpy, client->xwin_modal_blocker, attrs.your_event_mask);
}
if (ping_only)
handler = mb_wm_main_context_x_event_handler_add (wm->main_ctx,
client->xwin_modal_blocker,
ButtonRelease,
(MBWMXEventFunc)
hd_util_modal_blocker_release_handler_for_ping,
client);
else
handler = mb_wm_main_context_x_event_handler_add (wm->main_ctx,
client->xwin_modal_blocker,
ButtonRelease,
(MBWMXEventFunc)hd_util_modal_blocker_release_handler,
client);
return handler;
}
Bool
hd_util_client_has_modal_blocker (MBWindowManagerClient *c)
{
/* This is *almost* a system modal check, but we actually
* care if the client has modal blocker that means that
* h-d shouldn't allow the top-left buttons to work.
*
* Other clients exist that are not transient to anything
* but are not system modal (for example the Status Area)
*/
MBWMClientType c_type = MB_WM_CLIENT_CLIENT_TYPE(c);
return
((c_type == MBWMClientTypeDialog) ||
(c_type == MBWMClientTypeMenu) ||
(HD_WM_CLIENT_TYPE (c_type) == HdWmClientTypeAppMenu) ||
(HD_WM_CLIENT_TYPE (c_type) == HdWmClientTypeStatusMenu) ||
(c_type == MBWMClientTypeNote &&
HD_NOTE (c)->note_type != HdNoteTypeIncomingEventPreview &&
HD_NOTE (c)->note_type != HdNoteTypeIncomingEvent &&
HD_NOTE (c)->note_type != HdNoteTypeBanner)) &&
!mb_wm_client_get_transient_for (c) &&
mb_wm_get_modality_type (c->wmref) == MBWMModalitySystem;
}
static RRCrtc
get_primary_crtc (MBWindowManager *wm, XRRScreenResources *res)
{
int i;
XRROutputInfo *output;
RRCrtc ret = ~0UL;
Atom rr_connector_type, rr_connector_panel;
unsigned char *contype;
Atom actual_type;
int actual_format;
unsigned long nitems, bytes_after;
if (res->ncrtc == 1)
return res->crtcs[0];
rr_connector_type = hd_comp_mgr_wm_get_atom(
wm, HD_ATOM_RANDR_CONNECTOR_TYPE);
rr_connector_panel = hd_comp_mgr_wm_get_atom(
wm, HD_ATOM_RANDR_CONNECTOR_TYPE_PANEL);
for (i = 0; i < res->noutput; i++)
{
output = XRRGetOutputInfo (wm->xdpy, res, res->outputs[i]);
if (!output)
continue;
if (XRRGetOutputProperty (wm->xdpy, res->outputs[i], rr_connector_type,
0, 1, False, False, AnyPropertyType, &actual_type,
&actual_format, &nitems, &bytes_after,
&contype) == Success)
{
if (actual_type == XA_ATOM && actual_format == 32 && nitems == 1 &&
*(Atom *)contype == rr_connector_panel)
{
ret = output->crtc;
XRRFreeOutputInfo (output);
break;
}
}
XRRFreeOutputInfo (output);
}
if (ret == ~0UL)
{
RROutput primary = XRRGetOutputPrimary (wm->xdpy, wm->root_win->xwindow);
if (primary == None)
return ret;
output = XRRGetOutputInfo (wm->xdpy, res, primary);
if (output)
{
ret = output->crtc;
XRRFreeOutputInfo (output);
}
}
return ret;
}
/* Set a property on the root window to tell others whether we are doing
* rotation or not, so they can do certain things like increasing our
* process priority. */
void hd_util_set_rotating_property(MBWindowManager *wm, gboolean is_rotating)
{
HdCompMgr *hmgr = HD_COMP_MGR(wm->comp_mgr);
guint value = is_rotating ? 1 : 0;
XChangeProperty(wm->xdpy, wm->root_win->xwindow,
hd_comp_mgr_get_atom (hmgr, HD_ATOM_MAEMO_ROTATION_TRANSITION),
XA_CARDINAL, 32, PropModeReplace,
(unsigned char *)&value, 1);
}
void hd_util_set_screen_size_property(MBWindowManager *wm,
gboolean is_portrait)
{
unsigned value[2];
HdCompMgr *hmgr = HD_COMP_MGR(wm->comp_mgr);
value[!!is_portrait] = HD_COMP_MGR_LANDSCAPE_WIDTH;
value[ !is_portrait] = HD_COMP_MGR_LANDSCAPE_HEIGHT;
XChangeProperty(wm->xdpy, wm->root_win->hidden_window,
hd_comp_mgr_get_atom (hmgr, HD_ATOM_MAEMO_SCREEN_SIZE),
XA_CARDINAL, 32, PropModeReplace,
(unsigned char *)value, 2);
}
static gboolean
randr_supported(MBWindowManager *wm)
{
static int randr_supported = -1;
int rr_major, rr_minor;
if (randr_supported == -1)
{
Status ok = XRRQueryVersion (wm->xdpy, &rr_major, &rr_minor);
if (ok == 1 && (rr_major > 1 || (rr_major == 1 && rr_minor >= 3)))
randr_supported = 1;
else
randr_supported = 0;
}
return randr_supported != 0;
}
static gboolean
hd_util_change_screen_orientation_real (MBWindowManager *wm,
gboolean goto_portrait,
gboolean do_change)
{
static RRCrtc crtc = ~0UL; /* cache to avoid potentially lots of roundtrips */
XRRScreenResources *res;
XRRCrtcInfo *crtc_info;
Rotation want;
Status status = RRSetConfigSuccess;
int width, height, width_mm, height_mm;
unsigned long one = 1;
gboolean rv = FALSE;
if (!randr_supported(wm))
{
g_debug ("Server does not support RandR 1.3\n");
return FALSE;
}
res = XRRGetScreenResources (wm->xdpy, wm->root_win->xwindow);
if (!res)
{
g_warning ("Couldn't get RandR screen resources\n");
return FALSE;
}
if (crtc == ~0UL)
crtc = get_primary_crtc (wm, res);
if (crtc == ~0UL)
{
g_warning ("Couldn't find CRTC to rotate\n");
goto err_res;
}
crtc_info = XRRGetCrtcInfo (wm->xdpy, res, crtc);
if (!crtc_info)
{
g_warning ("Couldn't find CRTC info\n");
goto err_res;
}
if (display_is_portrait == -1)
display_is_portrait = FALSE;
if (goto_portrait)
{
if (do_change)
{
g_debug ("Entering portrait mode");
want = RR_Rotate_90;
width = MIN(DisplayWidth (wm->xdpy, DefaultScreen (wm->xdpy)),
DisplayHeight (wm->xdpy, DefaultScreen (wm->xdpy)));
height = MAX(DisplayWidth (wm->xdpy, DefaultScreen (wm->xdpy)),
DisplayHeight (wm->xdpy, DefaultScreen (wm->xdpy)));
width_mm = MIN(DisplayWidthMM (wm->xdpy, DefaultScreen (wm->xdpy)),
DisplayHeightMM (wm->xdpy, DefaultScreen (wm->xdpy)));
height_mm = MAX(DisplayWidthMM (wm->xdpy, DefaultScreen (wm->xdpy)),
DisplayHeightMM (wm->xdpy, DefaultScreen (wm->xdpy)));
}
if ((crtc_info->rotation == RR_Rotate_0 &&
crtc_info->width < crtc_info->height) ||
(crtc_info->rotation == RR_Rotate_270 &&
crtc_info->width > crtc_info->height))
{
want = RR_Rotate_0;
display_is_portrait = TRUE;
}
}
else
{
if (do_change)
{
g_debug ("Leaving portrait mode");
want = RR_Rotate_0;
width = MAX(DisplayWidth (wm->xdpy, DefaultScreen (wm->xdpy)),
DisplayHeight (wm->xdpy, DefaultScreen (wm->xdpy)));
height = MIN(DisplayWidth (wm->xdpy, DefaultScreen (wm->xdpy)),
DisplayHeight (wm->xdpy, DefaultScreen (wm->xdpy)));
width_mm = MAX(DisplayWidthMM (wm->xdpy, DefaultScreen (wm->xdpy)),
DisplayHeightMM (wm->xdpy, DefaultScreen (wm->xdpy)));
height_mm = MIN(DisplayWidthMM (wm->xdpy, DefaultScreen (wm->xdpy)),
DisplayHeightMM (wm->xdpy, DefaultScreen (wm->xdpy)));
}
if ((crtc_info->rotation == RR_Rotate_0 &&
crtc_info->width < crtc_info->height) ||
(crtc_info->rotation == RR_Rotate_270 &&
crtc_info->width > crtc_info->height))
{
want = RR_Rotate_270;
display_is_portrait = TRUE;
}
}
if (initially_rotated == -1)
{
initially_rotated = crtc_info->rotation != RR_Rotate_0 &&
crtc_info->rotation != RR_Rotate_180;
}
if (do_change)
{
if (!(crtc_info->rotations & want))
{
g_warning ("CRTC does not support rotation (0x%.8X vs. 0x%.8X)",
crtc_info->rotations, want);
goto err_crtc_info;
}
if (crtc_info->rotation == want)
{
g_debug ("Requested rotation already active");
goto err_crtc_info;
}
/* We must call glFinish here in order to be sure that OpenGL won't be
* trying to render stuff while we do the transition - as this sometimes
* causes rubbish to be displayed. */
glFinish();
/* Grab the server around rotation to prevent clients attempting to
* draw at inopportune times. */
XGrabServer (wm->xdpy);
/* Stop windows being reconfigured */
XChangeProperty(wm->xdpy, wm->root_win->xwindow,
wm->atoms[MBWM_ATOM_MAEMO_SUPPRESS_ROOT_RECONFIGURATION],
XA_CARDINAL, 32, PropModeReplace,
(unsigned char *)&one, 1);
/* Disable the CRTC first, as it doesn't fit within our existing screen. */
XRRSetCrtcConfig (wm->xdpy, res, crtc, crtc_info->timestamp, 0, 0, None,
RR_Rotate_0, NULL, 0);
/* Then change the screen size to accommodate our glorious new CRTC. */
XRRSetScreenSize (wm->xdpy, wm->root_win->xwindow, width, height,
width_mm, height_mm);
/* And now rotate. */
status = XRRSetCrtcConfig (wm->xdpy, res, crtc, crtc_info->timestamp,
crtc_info->x, crtc_info->y, crtc_info->mode, want,
crtc_info->outputs, crtc_info->noutput);
/* hd_util_root_window_configured will be called directly after this root
* window has been reconfigured */
/* Allow clients to redraw. */
XUngrabServer (wm->xdpy);
XFlush (wm->xdpy); /* <-- this is required to avoid a lock-up */
}
rv = TRUE;
err_crtc_info:
XRRFreeCrtcInfo (crtc_info);
err_res:
XRRFreeScreenResources (res);
if (rv == TRUE && do_change)
{
if (status != RRSetConfigSuccess)
{
g_warning ("XRRSetCrtcConfig() failed: %d", status);
return FALSE;
}
hd_render_manager_flip_input_viewport();
}
return rv;
}
/* Change the screen's orientation by rotating 90 degrees
* (portrait mode) or going back to landscape.
* Returns whether the orientation has actually changed. */
gboolean
hd_util_change_screen_orientation (MBWindowManager *wm,
gboolean goto_portrait)
{
return hd_util_change_screen_orientation_real(wm, goto_portrait, TRUE);
}
/* This is the finishing counterpart of hd_util_change_screen_orientation(),
* which must be called after the root window has been reconfigured. */
void
hd_util_root_window_configured(MBWindowManager *wm)
{
/* Deleting this property allows other windows to be reconfigured again. */
mb_wm_util_async_trap_x_errors (wm->xdpy);
XDeleteProperty(wm->xdpy, wm->root_win->xwindow,
wm->atoms[MBWM_ATOM_MAEMO_SUPPRESS_ROOT_RECONFIGURATION]);
XSync(wm->xdpy, False);
mb_wm_util_async_untrap_x_errors ();
}
/* Map a portrait @geo to landscape screen or vica versa.
* Returns if it mapped to ladnscape. */
gboolean
hd_util_rotate_geometry (ClutterGeometry *geo, guint scrw, guint scrh)
{
gint tmp;
tmp = geo->width;
geo->width = geo->height;
geo->height = tmp;
/* It is very interesting to observe the dualism here. */
if (scrw > scrh)
{ /* Map from from portrait to landscape. */
tmp = geo->x;
geo->x = geo->y;
geo->y = scrh - (tmp + geo->height);
return TRUE;
}
else
{ /* Map from landscape to portrait. */
tmp = geo->y;
geo->y = geo->x;
geo->x = scrw - (tmp + geo->width);
return FALSE;
}
}
/* Get the current cursor position, return true (and updates the parameters)
* on success, otherwise leaves them as they were */
gboolean hd_util_get_cursor_position(gint *x, gint *y)
{
Window root, child;
int root_x, root_y;
int pos_x, pos_y;
unsigned int keys_buttons;
MBWindowManager *wm = mb_wm_root_window_get (NULL)->wm;
if (!wm->root_win)
return FALSE;
if (!XQueryPointer(wm->xdpy, wm->root_win->xwindow, &root, &child, &root_x, &root_y,
&pos_x, &pos_y, &keys_buttons))
return FALSE;
*x = pos_x;
*y = pos_y;
return TRUE;
}
gboolean hd_util_client_has_video_overlay(MBWindowManagerClient *client)
{
MBWindowManager *wm;
HdCompMgr *hmgr;
Atom atom;
Atom actual_type_return;
int actual_format_return;
unsigned long nitems_return;
unsigned long bytes_after_return;
unsigned char* prop_return = NULL;
int result = 0;
wm = client->wmref;
hmgr = HD_COMP_MGR (wm->comp_mgr);
atom = hd_comp_mgr_get_atom (hmgr, HD_ATOM_OMAP_VIDEO_OVERLAY);
mb_wm_util_async_trap_x_errors (wm->xdpy);
XGetWindowProperty (wm->xdpy, client->window->xwindow,
atom,
0, G_MAXLONG,
False,
AnyPropertyType,
&actual_type_return,
&actual_format_return,
&nitems_return,
&bytes_after_return,
&prop_return);
if (prop_return)
{
result = prop_return[0];
XFree (prop_return);
}
mb_wm_util_async_untrap_x_errors();
return result;
}
/* Send a synthetic %ButtonPress to @c. */
void
hd_util_click (const MBWindowManagerClient *c)
{
Window xwin;
Display *xdpy;
XButtonEvent ev;
xwin = c->window->xwindow;
xdpy = c->wmref->xdpy;
memset (&ev, 0, sizeof (ev));
ev.type = ButtonPress;
ev.send_event = True;
ev.display = xdpy;
ev.window = xwin;
ev.root = DefaultRootWindow (xdpy);
ev.time = CurrentTime;
ev.button = Button1;
ev.same_screen = True;
XSendEvent(xdpy, xwin, False, ButtonPressMask, (XEvent *)&ev);
}
/* Try and get the translated bounds for an actor (the actual pixel position
* of it on the screen). If geo is 0 or width/height are 0, this func will
* use the full bounds of the actor. Otherwise we translate the bounds given
* in geo (eg. for updating an area of an actor). Returns false if it failed
* (because the actor or its parents were rotated) */
static gboolean
hd_util_get_actor_bounds(ClutterActor *actor, ClutterGeometry *geo, gboolean *is_visible)
{
gdouble x, y;
gdouble width, height;
ClutterActor *it = actor;
ClutterActor *stage = clutter_actor_get_stage(actor);
gboolean visible = TRUE;
gboolean valid = TRUE;
if (geo && geo->width && geo->height)
{
x = geo->x;
y = geo->y;
width = geo->width;
height = geo->height;
}
else
{
guint w,h;
clutter_actor_get_size(actor, &w, &h);
x = 0;
y = 0;
width = w;
height = h;
}
while (it && it != stage)
{
ClutterFixed px,py;
gdouble scalex, scaley;
ClutterUnit anchorx, anchory;
/* Big safety check here - don't attempt to work out bounds if anything
* is rotated, as we'll probably get it wrong. */
clutter_actor_get_scale(it, &scalex, &scaley);
clutter_actor_get_anchor_pointu(it, &anchorx, &anchory);
if (clutter_actor_get_rotationu(it, CLUTTER_X_AXIS, 0, 0, 0)!=0 ||
clutter_actor_get_rotationu(it, CLUTTER_Y_AXIS, 0, 0, 0)!=0 ||
clutter_actor_get_rotationu(it, CLUTTER_Z_AXIS, 0, 0, 0)!=0)
valid = FALSE;
clutter_actor_get_positionu(it, &px, &py);
x = ((x - CLUTTER_FIXED_TO_DOUBLE(anchorx))*scalex)
+ CLUTTER_FIXED_TO_DOUBLE(px);
y = ((y - CLUTTER_FIXED_TO_DOUBLE(anchory))*scaley)
+ CLUTTER_FIXED_TO_DOUBLE(py);
width *= scalex;
height *= scaley;
it = clutter_actor_get_parent(it);
}
if (geo)
{
/* Do some simple rounding */
geo->x = (int)(x + 0.5);
geo->y = (int)(y + 0.5);
geo->width = (int)(width + 0.5);
geo->height = (int)(height + 0.5);
}
if (is_visible)
{
*is_visible = visible;
}
return valid;
}
/* Call this after an actor is updated, and it will ask the stage to redraw
* in whatever way is best (a small area if it can manage, or the whole
* screen if not). NOTE: This takes account of *current* visibility (so
* it won't update if an actor goes from visible->invisible). It also won't
* Update correctly if an actor is moved/scaled. For that, you'll have to call
* it once before and once after.
* clutter_actor_set_allow_redraw(actor, false) should be called before using
* this, or the actor will cause a full screen redraw regardless.*/
void
hd_util_partial_redraw_if_possible(ClutterActor *actor, ClutterGeometry *bounds)
{
ClutterGeometry area = {0,0,0,0};
ClutterActor *stage = clutter_stage_get_default();
gboolean visible, valid;
if (bounds)
area = *bounds;
valid = hd_util_get_actor_bounds(actor, &area, &visible);
if (!visible) return;
if (valid)
{
/* Queue a redraw, but without updating the whole area */
clutter_stage_set_damaged_area(stage, area);
clutter_actor_queue_redraw_damage(stage);
}
else
{
clutter_actor_queue_redraw(stage);
}
}
/* Check to see whether clients above this one totally obscure it */
gboolean hd_util_client_obscured(MBWindowManagerClient *client)
{
GdkRegion *region;
MBWindowManagerClient *obscurer;
gboolean empty;
if (!client->window)
return FALSE; /* be safe */
/* Get region representing the current client */
region = gdk_region_rectangle((GdkRectangle*)(void*)&client->window->geometry);
/* Subtract the region of all clients above */
for (obscurer = client->stacked_above;
obscurer && !gdk_region_empty(region);
obscurer = obscurer->stacked_above)
{
GdkRegion *obscure_region;
if (!obscurer->window)
continue; /* be safe */
obscure_region =
gdk_region_rectangle((GdkRectangle*)(void*)&obscurer->window->geometry);
gdk_region_subtract(region, obscure_region);
gdk_region_destroy(obscure_region);
}
/* If there is nothing left, then this can't
* be visible */
empty = gdk_region_empty(region);
gdk_region_destroy(region);
return empty;
}
/* Structure holding a list of keyframes that will be linearly interpolated
* between to produce animation*/
struct _HdKeyFrameList {
float *keyframes;
int count;
};
/* Create a keyframe list from a comma-separated list of floating point values */
HdKeyFrameList *hd_key_frame_list_create(const char *keys)
{
char *key_copy = 0;
char *p;
int i=0;
HdKeyFrameList *k = (HdKeyFrameList*)g_malloc0(sizeof(HdKeyFrameList));
/* Fail nicely by returning a straight ramp */
if (!keys || strlen(keys)<=1)
goto fail;
key_copy = g_strdup(keys);
/* Scan for how many elements we need */
k->count = 0;
for (p=key_copy;*p;p++)
if (*p==',') k->count++;
if (key_copy[strlen(key_copy)-1]!=',')
k->count++;
if (k->count<2)
goto fail;
k->keyframes = (float*)g_malloc0(sizeof(float) * k->count);
/* read in individual keys */
for (p=key_copy;*p;)
{
char *comma = p;
char old_comma;
/* Find comma and replace with string end character */
while (*comma && *comma!=',')
comma++;
old_comma = *comma;
*comma = 0;
/* Read the data value */
k->keyframes[i++] = atof(p);
/* Set up for next iteration. If we hit the end, don't skip over it! */
if (old_comma)
p = comma+1;
else
p = comma;
}
k->count = i;
g_free(key_copy);
return k;
fail:
/* On failure, free memory, and return a simple
* linear ramp */
if (key_copy) g_free(key_copy);
/* k is already allocated */
k->count = 2;
if (k->keyframes) g_free(k->keyframes);
k->keyframes = (float*)g_malloc(sizeof(float) * k->count);
k->keyframes[0] = 0.0f;
k->keyframes[1] = 1.0f;
return k;
}
void hd_key_frame_list_free(HdKeyFrameList *k)
{
if (k)
{
g_free(k->keyframes);
g_free(k);
}
}
/* As X goes between 0 and 1, interpolate into the HdKeyFrameList */
float hd_key_frame_interpolate(HdKeyFrameList *k, float x)
{
float v,n;
int idx;
if (!k || k->count < 2)
return x;
v = x * (k->count-1);
idx = (int)v;
n = v - idx;
if (idx >= k->count-1)
{
idx = k->count-2;
n = 1;
}
if (idx<0)
{
idx = 0;
n = 0;
}
return k->keyframes[idx]*(1-n) + k->keyframes[idx+1]*n;
}
void
hd_util_display_portraitness_init(MBWindowManager *wm)
{
g_assert(display_is_portrait == -1);
hd_util_change_screen_orientation_real(wm, FALSE, FALSE);
}
/* Display width, accounting for initial rotation */
guint
hd_util_display_width()
{
static guint width = 0;
if (width == 0)
{
if ((!display_is_portrait && !initially_rotated) ||
(display_is_portrait && initially_rotated))
{
width = WidthOfScreen(ScreenOfDisplay(
clutter_x11_get_default_display(), 0));
}
else
{
width = HeightOfScreen(ScreenOfDisplay(
clutter_x11_get_default_display(), 0));
}
}
return width;
}
/* Display height, accounting for initial rotation */
guint
hd_util_display_height()
{
static guint height = 0;
if (height == 0)
{
if ((!display_is_portrait && !initially_rotated) ||
(display_is_portrait && initially_rotated))
{
height = HeightOfScreen(ScreenOfDisplay(
clutter_x11_get_default_display(), 0));
}
else
{
height = WidthOfScreen(ScreenOfDisplay(
clutter_x11_get_default_display(), 0));
}
}
return height;
}
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