static void
clutter_deform_effect_finalize (GObject *gobject)
{
ClutterDeformEffect *self = CLUTTER_DEFORM_EFFECT (gobject);
clutter_deform_effect_free_arrays (self);
clutter_deform_effect_free_back_pipeline (self);
G_OBJECT_CLASS (clutter_deform_effect_parent_class)->finalize (gobject);
}
static void
clutter_deform_effect_init_arrays (ClutterDeformEffect *self)
{
ClutterDeformEffectPrivate *priv = self->priv;
gint x, y, direction, n_indices;
CoglAttribute *attributes[3];
guint16 *static_indices;
CoglContext *ctx =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
CoglIndices *indices;
guint16 *idx;
int i;
clutter_deform_effect_free_arrays (self);
n_indices = ((2 + 2 * priv->x_tiles)
* priv->y_tiles
+ (priv->y_tiles - 1));
static_indices = g_new (guint16, n_indices);
#define MESH_INDEX(x,y) ((y) * (priv->x_tiles + 1) + (x))
/* compute all the triangles from the various tiles */
direction = 1;
idx = static_indices;
idx[0] = MESH_INDEX (0, 0);
idx[1] = MESH_INDEX (0, 1);
idx += 2;
for (y = 0; y < priv->y_tiles; y++)
{
for (x = 0; x < priv->x_tiles; x++)
{
if (direction)
{
idx[0] = MESH_INDEX (x + 1, y);
idx[1] = MESH_INDEX (x + 1, y + 1);
}
else
{
idx[0] = MESH_INDEX (priv->x_tiles - x - 1, y);
idx[1] = MESH_INDEX (priv->x_tiles - x - 1, y + 1);
}
idx += 2;
}
if (y == (priv->y_tiles - 1))
break;
if (direction)
{
idx[0] = MESH_INDEX (priv->x_tiles, y + 1);
idx[1] = MESH_INDEX (priv->x_tiles, y + 1);
idx[2] = MESH_INDEX (priv->x_tiles, y + 2);
}
else
{
idx[0] = MESH_INDEX (0, y + 1);
idx[1] = MESH_INDEX (0, y + 1);
idx[2] = MESH_INDEX (0, y + 2);
}
idx += 3;
direction = !direction;
}
#undef MESH_INDEX
indices = cogl_indices_new (ctx,
COGL_INDICES_TYPE_UNSIGNED_SHORT,
static_indices,
n_indices);
g_free (static_indices);
priv->n_vertices = (priv->x_tiles + 1) * (priv->y_tiles + 1);
priv->buffer =
cogl_attribute_buffer_new (ctx,
sizeof (CoglVertexP3T2C4) *
priv->n_vertices,
NULL);
/* The application is expected to continuously modify the vertices
so we should give a hint to Cogl about that */
cogl_buffer_set_update_hint (COGL_BUFFER (priv->buffer),
COGL_BUFFER_UPDATE_HINT_DYNAMIC);
attributes[0] = cogl_attribute_new (priv->buffer,
"cogl_position_in",
sizeof (CoglVertexP3T2C4),
G_STRUCT_OFFSET (CoglVertexP3T2C4, x),
3, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
attributes[1] = cogl_attribute_new (priv->buffer,
"cogl_tex_coord0_in",
sizeof (CoglVertexP3T2C4),
G_STRUCT_OFFSET (CoglVertexP3T2C4, s),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
attributes[2] = cogl_attribute_new (priv->buffer,
"cogl_color_in",
sizeof (CoglVertexP3T2C4),
G_STRUCT_OFFSET (CoglVertexP3T2C4, r),
4, /* n_components */
COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE);
priv->primitive =
cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_TRIANGLE_STRIP,
priv->n_vertices,
attributes,
3 /* n_attributes */);
cogl_primitive_set_indices (priv->primitive,
indices,
n_indices);
if (G_UNLIKELY (clutter_paint_debug_flags & CLUTTER_DEBUG_PAINT_DEFORM_TILES))
{
priv->lines_primitive =
cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_LINE_STRIP,
priv->n_vertices,
attributes,
2 /* n_attributes */);
cogl_primitive_set_indices (priv->lines_primitive,
indices,
n_indices);
}
cogl_object_unref (indices);
for (i = 0; i < 3; i++)
cogl_object_unref (attributes[i]);
priv->is_dirty = TRUE;
}
static void
clutter_deform_effect_init_arrays (ClutterDeformEffect *self)
{
ClutterDeformEffectPrivate *priv = self->priv;
GLushort *static_indices, *static_back_indices;
GLushort *idx, *back_idx;
gint x, y, direction;
gint n_tiles;
clutter_deform_effect_free_arrays (self);
priv->n_indices = (2 + 2 * priv->x_tiles)
* priv->y_tiles
+ (priv->y_tiles - 1);
static_indices = g_new (GLushort, priv->n_indices);
static_back_indices = g_new (GLushort, priv->n_indices);
#define MESH_INDEX(x,y) ((y) * (priv->x_tiles + 1) + (x))
/* compute all the triangles from the various tiles */
direction = 1;
idx = static_indices;
idx[0] = MESH_INDEX (0, 0);
idx[1] = MESH_INDEX (0, 1);
idx += 2;
back_idx = static_back_indices;
back_idx[0] = MESH_INDEX (priv->x_tiles, 0);
back_idx[1] = MESH_INDEX (priv->x_tiles, 1);
back_idx += 2;
for (y = 0; y < priv->y_tiles; y++)
{
for (x = 0; x < priv->x_tiles; x++)
{
if (direction)
{
idx[0] = MESH_INDEX (x + 1, y);
idx[1] = MESH_INDEX (x + 1, y + 1);
back_idx[0] = MESH_INDEX (priv->x_tiles - (x + 1), y);
back_idx[1] = MESH_INDEX (priv->x_tiles - (x + 1), y + 1);
}
else
{
idx[0] = MESH_INDEX (priv->x_tiles - x - 1, y);
idx[1] = MESH_INDEX (priv->x_tiles - x - 1, y + 1);
back_idx[0] = MESH_INDEX (x + 1, y);
back_idx[1] = MESH_INDEX (x + 1, y + 1);
}
idx += 2;
back_idx += 2;
}
if (y == (priv->y_tiles - 1))
break;
if (direction)
{
idx[0] = MESH_INDEX (priv->x_tiles, y + 1);
idx[1] = MESH_INDEX (priv->x_tiles, y + 1);
idx[2] = MESH_INDEX (priv->x_tiles, y + 2);
back_idx[0] = MESH_INDEX (0, y + 1);
back_idx[1] = MESH_INDEX (0, y + 1);
back_idx[2] = MESH_INDEX (0, y + 2);
}
else
{
idx[0] = MESH_INDEX (0, y + 1);
idx[1] = MESH_INDEX (0, y + 1);
idx[2] = MESH_INDEX (0, y + 2);
back_idx[0] = MESH_INDEX (priv->x_tiles, y + 1);
back_idx[1] = MESH_INDEX (priv->x_tiles, y + 1);
back_idx[2] = MESH_INDEX (priv->x_tiles, y + 2);
}
idx += 3;
back_idx += 3;
direction = !direction;
}
#undef MESH_INDEX
priv->indices =
cogl_vertex_buffer_indices_new (COGL_INDICES_TYPE_UNSIGNED_SHORT,
static_indices,
priv->n_indices);
priv->back_indices =
cogl_vertex_buffer_indices_new (COGL_INDICES_TYPE_UNSIGNED_SHORT,
static_back_indices,
priv->n_indices);
g_free (static_indices);
g_free (static_back_indices);
n_tiles = (priv->x_tiles + 1) * (priv->y_tiles + 1);
priv->vertices = g_new (CoglTextureVertex, n_tiles);
priv->vbo = cogl_vertex_buffer_new (n_tiles);
priv->is_dirty = TRUE;
}
