RutPointalismGrid *
rut_pointalism_grid_new (RutContext *ctx,
float size,
int tex_width,
int tex_height)
{
RutPointalismGrid *grid = g_slice_new0 (RutPointalismGrid);
RutBuffer *buffer = rut_buffer_new (sizeof (CoglVertexP3) * 6);
RutMesh *pick_mesh = rut_mesh_new_from_buffer_p3 (COGL_VERTICES_MODE_TRIANGLES,
6,
buffer);
CoglVertexP3 *pick_vertices = (CoglVertexP3 *)buffer->data;
float half_tex_width;
float half_tex_height;
rut_object_init (&grid->_parent, &rut_pointalism_grid_type);
grid->ref_count = 1;
grid->component.type = RUT_COMPONENT_TYPE_GEOMETRY;
grid->ctx = rut_refable_ref (ctx);
rut_list_init (&grid->updated_cb_list);
grid->slice = pointalism_grid_slice_new (tex_width, tex_height,
size);
half_tex_width = tex_width / 2.0f;
half_tex_height = tex_height / 2.0f;
pick_vertices[0].x = -half_tex_width;
pick_vertices[0].y = -half_tex_height;
pick_vertices[1].x = -half_tex_width;
pick_vertices[1].y = half_tex_height;
pick_vertices[2].x = half_tex_width;
pick_vertices[2].y = half_tex_height;
pick_vertices[3] = pick_vertices[0];
pick_vertices[4] = pick_vertices[2];
pick_vertices[5].x = half_tex_width;
pick_vertices[5].y = -half_tex_height;
grid->pick_mesh = pick_mesh;
grid->pointalism_scale = 1;
grid->pointalism_z = 1;
grid->pointalism_lighter = TRUE;
grid->cell_size = size;
grid->tex_width = tex_width;
grid->tex_height = tex_height;
rut_simple_introspectable_init (grid, _rut_pointalism_grid_prop_specs,
grid->properties);
return grid;
}
RutDiamond *
rut_diamond_new (RutContext *ctx,
float size,
int tex_width,
int tex_height)
{
RutDiamond *diamond = g_slice_new0 (RutDiamond);
RutBuffer *buffer = rut_buffer_new (sizeof (CoglVertexP3) * 6);
RutMesh *pick_mesh = rut_mesh_new_from_buffer_p3 (COGL_VERTICES_MODE_TRIANGLES,
6,
buffer);
CoglVertexP3 *pick_vertices = (CoglVertexP3 *)buffer->data;
rut_object_init (&diamond->_parent, &rut_diamond_type);
diamond->ref_count = 1;
diamond->component.type = RUT_COMPONENT_TYPE_GEOMETRY;
diamond->ctx = rut_refable_ref (ctx);
diamond->size = size;
/* XXX: It could be worth maintaining a cache of diamond slices
* indexed by the <size, tex_width, tex_height> tuple... */
diamond->slice = diamond_slice_new (ctx, size, tex_width, tex_height);
pick_vertices[0].x = 0;
pick_vertices[0].y = 0;
pick_vertices[1].x = 0;
pick_vertices[1].y = size;
pick_vertices[2].x = size;
pick_vertices[2].y = size;
pick_vertices[3] = pick_vertices[0];
pick_vertices[4] = pick_vertices[2];
pick_vertices[5].x = size;
pick_vertices[5].y = 0;
cogl_matrix_transform_points (&diamond->slice->rotate_matrix,
2,
sizeof (CoglVertexP3),
pick_vertices,
sizeof (CoglVertexP3),
pick_vertices,
6);
diamond->pick_mesh = pick_mesh;
return diamond;
}
static RutShapeModel *
shape_model_new (RutContext *ctx,
CoglBool shaped,
float tex_width,
float tex_height)
{
RutShapeModel *shape_model = g_slice_new (RutShapeModel);
RutBuffer *buffer = rut_buffer_new (sizeof (CoglVertexP3) * 6);
RutMesh *pick_mesh = rut_mesh_new_from_buffer_p3 (COGL_VERTICES_MODE_TRIANGLES,
6,
buffer);
CoglVertexP3 *pick_vertices = (CoglVertexP3 *)buffer->data;
CoglMatrix matrix;
float tex_aspect;
float size_x;
float size_y;
float half_size_x;
float half_size_y;
float geom_size_x;
float geom_size_y;
float half_geom_size_x;
float half_geom_size_y;
rut_object_init (&shape_model->_parent, &rut_shape_model_type);
shape_model->ref_count = 1;
if (shaped)
{
/* In this case we are using a shape mask texture which is has a
* square size and is padded with transparent pixels to provide
* antialiasing. The shape mask is half the size of the texture
* itself so we make the geometry twice as large to compensate.
*/
size_x = MIN (tex_width, tex_height);
size_y = size_x;
geom_size_x = size_x * 2.0;
geom_size_y = geom_size_x;
}
else
{
size_x = tex_width;
size_y = tex_height;
geom_size_x = tex_width;
geom_size_y = tex_height;
}
half_size_x = size_x / 2.0;
half_size_y = size_y / 2.0;
half_geom_size_x = geom_size_x / 2.0;
half_geom_size_y = geom_size_y / 2.0;
{
int n_vertices;
int i;
VertexP2T2T2 vertices[] =
{
{ -half_geom_size_x, -half_geom_size_y, 0, 0, 0, 0 },
{ -half_geom_size_x, half_geom_size_y, 0, 1, 0, 1 },
{ half_geom_size_x, half_geom_size_y, 1, 1, 1, 1 },
{ -half_geom_size_x, -half_geom_size_y, 0, 0, 0, 0 },
{ half_geom_size_x, half_geom_size_y, 1, 1, 1, 1 },
{ half_geom_size_x, -half_geom_size_y, 1, 0, 1, 0 },
};
cogl_matrix_init_identity (&matrix);
tex_aspect = (float)tex_width / (float)tex_height;
if (shaped)
{
float s_scale, t_scale;
float s0, t0;
/* NB: The circle mask texture has a centered circle that is
* half the width of the texture itself. We want the primary
* texture to be mapped to this center circle. */
s_scale = 2;
t_scale = 2;
if (tex_aspect < 1) /* taller than it is wide */
t_scale *= tex_aspect;
else /* wider than it is tall */
{
float inverse_aspect = 1.0f / tex_aspect;
s_scale *= inverse_aspect;
}
s0 = 0.5 - (s_scale / 2.0);
t0 = 0.5 - (t_scale / 2.0);
cogl_matrix_translate (&matrix, s0, t0, 0);
cogl_matrix_scale (&matrix, s_scale, t_scale, 1);
}
n_vertices = sizeof (vertices) / sizeof (VertexP2T2T2);
for (i = 0; i < n_vertices; i++)
{
float z = 0, w = 1;
cogl_matrix_transform_point (&matrix,
&vertices[i].s1,
&vertices[i].t1,
&z,
&w);
#ifdef MESA_CONST_ATTRIB_BUG_WORKAROUND
vertices[i].Nx = 0;
vertices[i].Ny = 0;
vertices[i].Nz = 1;
vertices[i].Tx = 1;
vertices[i].Ty = 0;
vertices[i].Tz = 0;
#endif
}
shape_model->primitive =
primitive_new_p2t2t2 (ctx->cogl_context,
COGL_VERTICES_MODE_TRIANGLES,
n_vertices,
vertices);
}
shape_model->shape_texture = cogl_object_ref (ctx->circle_texture);
pick_vertices[0].x = -half_size_x;
pick_vertices[0].y = -half_size_y;
pick_vertices[1].x = -half_size_x;
pick_vertices[1].y = half_size_y;
pick_vertices[2].x = half_size_x;
pick_vertices[2].y = half_size_y;
pick_vertices[3] = pick_vertices[0];
pick_vertices[4] = pick_vertices[2];
pick_vertices[5].x = half_size_x;
pick_vertices[5].y = -half_size_y;
shape_model->pick_mesh = pick_mesh;
return shape_model;
}
