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mutter-performance-source/clutter/clutter-stage.c
Matthew Allum 342ea125f1 Merge gobject-branch into trunk
2006-05-29 08:59:36 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "clutter-stage.h"
#include "clutter-main.h"
#include "clutter-color.h"
#include "clutter-private.h" /* for DBG */
#include <GL/glx.h>
#include <GL/gl.h>
G_DEFINE_TYPE (ClutterStage, clutter_stage, CLUTTER_TYPE_GROUP);
static ClutterElementClass *parent_class;
struct ClutterStagePrivate
{
Window xwin;
gint xwin_width, xwin_height;
gboolean want_fullscreen;
gboolean hide_cursor;
ClutterColor color;
};
enum
{
PROP_0,
PROP_FULLSCREEN,
PROP_HIDE_CURSOR
};
enum
{
SIGNAL_INPUT_EVENT,
LAST_SIGNAL
};
static int stage_signals[LAST_SIGNAL] = { 0 };
static void
sync_fullscreen (ClutterStage *stage)
{
Atom atom_WINDOW_STATE, atom_WINDOW_STATE_FULLSCREEN;
atom_WINDOW_STATE
= XInternAtom(clutter_xdisplay(), "_NET_WM_STATE", False);
atom_WINDOW_STATE_FULLSCREEN
= XInternAtom(clutter_xdisplay(), "_NET_WM_STATE_FULLSCREEN",False);
if (stage->priv->want_fullscreen)
{
clutter_element_set_size (CLUTTER_ELEMENT(stage),
DisplayWidth(clutter_xdisplay(),
clutter_xscreen()),
DisplayHeight(clutter_xdisplay(),
clutter_xscreen()));
if (stage->priv->xwin != None)
XChangeProperty(clutter_xdisplay(), stage->priv->xwin,
atom_WINDOW_STATE, XA_ATOM, 32,
PropModeReplace,
(unsigned char *)&atom_WINDOW_STATE_FULLSCREEN, 1);
}
else
{
/* FIXME */
if (stage->priv->xwin != None)
XDeleteProperty(clutter_xdisplay(),
stage->priv->xwin, atom_WINDOW_STATE);
}
}
static void
sync_cursor_visible (ClutterStage *stage)
{
if (stage->priv->xwin == None)
return;
if (stage->priv->hide_cursor)
{
XColor col;
Pixmap pix;
Cursor curs;
pix = XCreatePixmap (clutter_xdisplay(),
stage->priv->xwin, 1, 1, 1);
memset (&col, 0, sizeof (col));
curs = XCreatePixmapCursor (clutter_xdisplay(),
pix, pix, &col, &col, 1, 1);
XFreePixmap (clutter_xdisplay(), pix);
XDefineCursor(clutter_xdisplay(), stage->priv->xwin, curs);
}
else
{
XUndefineCursor(clutter_xdisplay(), stage->priv->xwin);
}
}
static void
frustum (GLfloat left,
GLfloat right,
GLfloat bottom,
GLfloat top,
GLfloat nearval,
GLfloat farval)
{
GLfloat x, y, a, b, c, d;
GLfloat m[16];
x = (2.0 * nearval) / (right - left);
y = (2.0 * nearval) / (top - bottom);
a = (right + left) / (right - left);
b = (top + bottom) / (top - bottom);
c = -(farval + nearval) / ( farval - nearval);
d = -(2.0 * farval * nearval) / (farval - nearval);
#define M(row,col) m[col*4+row]
M(0,0) = x; M(0,1) = 0.0F; M(0,2) = a; M(0,3) = 0.0F;
M(1,0) = 0.0F; M(1,1) = y; M(1,2) = b; M(1,3) = 0.0F;
M(2,0) = 0.0F; M(2,1) = 0.0F; M(2,2) = c; M(2,3) = d;
M(3,0) = 0.0F; M(3,1) = 0.0F; M(3,2) = -1.0F; M(3,3) = 0.0F;
#undef M
glMultMatrixf (m);
}
static void
perspective (GLfloat fovy,
GLfloat aspect,
GLfloat zNear,
GLfloat zFar)
{
GLfloat xmin, xmax, ymin, ymax;
ymax = zNear * tan (fovy * M_PI / 360.0);
ymin = -ymax;
xmin = ymin * aspect;
xmax = ymax * aspect;
frustum (xmin, xmax, ymin, ymax, zNear, zFar);
}
static void
sync_gl_viewport (ClutterStage *stage)
{
/* Set For 2D */
#if 0
glViewport (0, 0, stage->priv->xwin_width, stage->priv->xwin_height);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glOrtho (0, stage->priv->xwin_width, stage->priv->xwin_height, 0, -1, 1);
glMatrixMode (GL_MODELVIEW);
glLoadIdentity ();
#endif
/* For 3D */
glViewport (0, 0, stage->priv->xwin_width, stage->priv->xwin_height);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
perspective (60.0f, 1.0f, 0.1f, 100.0f);
glMatrixMode (GL_MODELVIEW);
glLoadIdentity ();
/* Then for 2D like transform */
/* camera distance from screen, 0.5 * tan (FOV) */
#define DEFAULT_Z_CAMERA 0.866025404f
glTranslatef (-0.5f, -0.5f, -DEFAULT_Z_CAMERA);
glScalef (1.0f / stage->priv->xwin_width,
-1.0f / stage->priv->xwin_height, 1.0f / stage->priv->xwin_width);
glTranslatef (0.0f, -stage->priv->xwin_height, 0.0f);
}
static void
clutter_stage_show (ClutterElement *self)
{
XMapWindow (clutter_xdisplay(),
clutter_stage_get_xwindow (CLUTTER_STAGE(self)));
}
static void
clutter_stage_hide (ClutterElement *self)
{
XUnmapWindow (clutter_xdisplay(),
clutter_stage_get_xwindow (CLUTTER_STAGE(self)));
}
static void
clutter_stage_unrealize (ClutterElement *element)
{
ClutterStage *stage;
ClutterStagePrivate *priv;
stage = CLUTTER_STAGE(element);
priv = stage->priv;
XDestroyWindow (clutter_xdisplay(), priv->xwin);
priv->xwin = None;
}
static void
clutter_stage_realize (ClutterElement *element)
{
ClutterStage *stage;
ClutterStagePrivate *priv;
stage = CLUTTER_STAGE(element);
priv = stage->priv;
priv->xwin = XCreateSimpleWindow(clutter_xdisplay(),
clutter_root_xwindow(),
0, 0,
priv->xwin_width, priv->xwin_height,
0, 0,
WhitePixel(clutter_xdisplay(),
clutter_xscreen()));
XSelectInput(clutter_xdisplay(),
priv->xwin,
StructureNotifyMask
|ExposureMask
|KeyPressMask
|KeyReleaseMask
|ButtonPressMask /* FIXME: Make optional ? */
|ButtonReleaseMask
|PropertyChangeMask);
sync_fullscreen (stage);
sync_cursor_visible (stage);
glXMakeCurrent(clutter_xdisplay(), priv->xwin, clutter_gl_context());
sync_gl_viewport (stage);
}
static void
clutter_stage_paint (ClutterElement *self)
{
parent_class->paint(self);
}
static void
clutter_stage_allocate_coords (ClutterElement *self,
ClutterElementBox *box)
{
/* Do nothing, just stop group_allocate getting called */
/* TODO: sync up with any configure events from WM ?? */
return;
}
static void
clutter_stage_request_coords (ClutterElement *self,
ClutterElementBox *box)
{
ClutterStage *stage;
ClutterStagePrivate *priv;
gint new_width, new_height;
stage = CLUTTER_STAGE(self);
priv = stage->priv;
new_width = ABS(box->x2 - box->x1);
new_height = ABS(box->y2 - box->y1);
if (new_width != priv->xwin_width || new_height != priv->xwin_height)
{
priv->xwin_width = new_width;
priv->xwin_height = new_height;
if (priv->xwin)
XResizeWindow (clutter_xdisplay(),
priv->xwin,
priv->xwin_width,
priv->xwin_height);
sync_gl_viewport (stage);
}
if (priv->xwin) /* Do we want to bother ? */
XMoveWindow (clutter_xdisplay(),
priv->xwin,
box->x1,
box->y1);
}
static void
clutter_stage_dispose (GObject *object)
{
ClutterStage *self = CLUTTER_STAGE(object);
if (self->priv)
{
if (self->priv->xwin)
clutter_stage_unrealize (CLUTTER_ELEMENT(self));
}
G_OBJECT_CLASS (clutter_stage_parent_class)->dispose (object);
}
static void
clutter_stage_finalize (GObject *object)
{
ClutterStage *self = CLUTTER_STAGE(object);
if (self->priv)
{
g_free(self->priv);
self->priv = NULL;
}
G_OBJECT_CLASS (clutter_stage_parent_class)->finalize (object);
}
static void
clutter_stage_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterStage *stage;
ClutterStagePrivate *priv;
stage = CLUTTER_STAGE(object);
priv = stage->priv;
switch (prop_id)
{
case PROP_FULLSCREEN:
if (priv->want_fullscreen != g_value_get_boolean (value))
{
priv->want_fullscreen = g_value_get_boolean (value);
sync_fullscreen (stage);
}
break;
case PROP_HIDE_CURSOR:
if (priv->hide_cursor != g_value_get_boolean (value))
{
priv->hide_cursor = g_value_get_boolean (value);
sync_cursor_visible (stage);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_stage_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterStage *stage;
ClutterStagePrivate *priv;
stage = CLUTTER_STAGE(object);
priv = stage->priv;
switch (prop_id)
{
case PROP_FULLSCREEN:
g_value_set_boolean (value, priv->want_fullscreen);
break;
case PROP_HIDE_CURSOR:
g_value_set_boolean (value, priv->hide_cursor);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_stage_class_init (ClutterStageClass *klass)
{
GObjectClass *gobject_class;
ClutterElementClass *element_class;
ClutterGroupClass *group_class;
gobject_class = (GObjectClass*)klass;
element_class = (ClutterElementClass*)klass;
group_class = (ClutterGroupClass*)klass;
element_class->realize = clutter_stage_realize;
element_class->unrealize = clutter_stage_unrealize;
element_class->show = clutter_stage_show;
element_class->hide = clutter_stage_hide;
element_class->paint = clutter_stage_paint;
element_class->request_coords = clutter_stage_request_coords;
element_class->allocate_coords = clutter_stage_allocate_coords;
gobject_class->dispose = clutter_stage_dispose;
gobject_class->finalize = clutter_stage_finalize;
gobject_class->set_property = clutter_stage_set_property;
gobject_class->get_property = clutter_stage_get_property;
parent_class = g_type_class_peek_parent(group_class);
g_object_class_install_property
(gobject_class, PROP_FULLSCREEN,
g_param_spec_boolean ("fullscreen",
"Fullscreen",
"Make Clutter stage fullscreen",
FALSE,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_HIDE_CURSOR,
g_param_spec_boolean ("hide-cursor",
"Hide Cursor",
"Make Clutter stage cursor-less",
FALSE,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE));
stage_signals[SIGNAL_INPUT_EVENT] =
g_signal_new ("input-event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterStageClass, input_event),
NULL, NULL,
g_cclosure_marshal_VOID__POINTER,
G_TYPE_NONE,
1, G_TYPE_POINTER);
}
static void
clutter_stage_init (ClutterStage *self)
{
ClutterStagePrivate *priv;
priv = g_new0 (ClutterStagePrivate, 1);
priv->xwin_width = 100;
priv->xwin_height = 100;
priv->color = 0xffffffff;
self->priv = priv;
clutter_element_set_size (CLUTTER_ELEMENT(self), 640, 480);
}
/**
* clutter_stage_get_xwindow
* @stage: A #ClutterStage
*
* Get the stages underlying x window ID.
*
* Return Value: Stage X Window XID
**/
Window
clutter_stage_get_xwindow (ClutterStage *stage)
{
return stage->priv->xwin;
}
/**
* clutter_stage_set_color
* @stage: A #ClutterStage
* @color: A #ClutterColor
*
* Set the stage color.
**/
void
clutter_stage_set_color (ClutterStage *stage,
ClutterColor color)
{
stage->priv->color = color;
if (CLUTTER_ELEMENT_IS_VISIBLE (CLUTTER_ELEMENT(stage)))
clutter_element_queue_redraw (CLUTTER_ELEMENT(stage));
}
/**
* clutter_stage_set_color
* @stage: A #ClutterStage
*
* Request the stage color.
*
* Return Value: The stages #ClutterColor
**/
ClutterColor
clutter_stage_get_color (ClutterStage *stage)
{
return stage->priv->color;
}
static void
snapshot_pixbuf_free(guchar *pixels, gpointer data)
{
g_free(pixels);
}
/**
* clutter_stage_snapshot
* @stage A #ClutterStage
* @x x coordinate of the first pixel that is read from stage
* @y y coordinate of the first pixel that is read from stage
* @width Width dimention of pixels to be read.
* @height Height dimention of pixels to be read.
*
* Gets a pixel based representation of the current rendered stage.
*
* Return value: pixel representation as a #GdkPixbuf
**/
GdkPixbuf*
clutter_stage_snapshot (ClutterStage *stage,
gint x,
gint y,
guint width,
guint height)
{
guchar *data;
GdkPixbuf *pixb, *fpixb;
data = g_malloc0(sizeof(guchar)*width*height*3);
glReadPixels (x,
clutter_element_get_height(CLUTTER_ELEMENT(clutter_stage()))
- y - height,
width,
height, GL_RGB, GL_UNSIGNED_BYTE, data);
pixb = gdk_pixbuf_new_from_data (data,
GDK_COLORSPACE_RGB,
FALSE,
8,
width,
height,
width * 3,
snapshot_pixbuf_free,
NULL);
if (pixb == NULL)
return NULL;
fpixb = gdk_pixbuf_flip (pixb, TRUE);
g_object_unref (pixb);
return fpixb;
}
/* FIXME: better name - pos_to_element */
ClutterElement*
clutter_stage_pick (ClutterStage *stage, gint x, gint y)
{
ClutterElement *found = NULL;
GLuint buff[64] = {0};
GLint hits, view[4], i;
glSelectBuffer(64, buff);
glGetIntegerv(GL_VIEWPORT, view);
glRenderMode(GL_SELECT);
glInitNames();
glPushName(0);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
/* This is gluPickMatrix(x, y, 1.0, 1.0, view); */
glTranslatef((view[2] - 2 * (x - view[0])),
(view[3] - 2 * (y - view[1])), 0);
glScalef(view[2], -view[3], 1.0);
perspective (60.0f, 1.0f, 0.1f, 100.0f);
glMatrixMode(GL_MODELVIEW);
clutter_element_paint(CLUTTER_ELEMENT(stage));
glMatrixMode(GL_PROJECTION);
glPopMatrix();
hits = glRenderMode(GL_RENDER);
if (hits != 0)
{
/*
for (i=0; i<hits; i++)
g_print ("Hit at %i\n", buff[i * 4 + 3]);
*/
found = clutter_group_find_child_by_id (clutter_stage(), buff[3]);
}
sync_gl_viewport (stage);
return found;
}
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