void _clutter_util_fully_transform_vertices (const CoglMatrix *modelview, const CoglMatrix *projection, const float *viewport, const ClutterVertex *vertices_in, ClutterVertex *vertices_out, int n_vertices) { CoglMatrix modelview_projection; ClutterVertex4 *vertices_tmp; int i; vertices_tmp = g_alloca (sizeof (ClutterVertex4) * n_vertices); if (n_vertices >= 4) { /* XXX: we should find a way to cache this per actor */ cogl_matrix_multiply (&modelview_projection, projection, modelview); cogl_matrix_project_points (&modelview_projection, 3, sizeof (ClutterVertex), vertices_in, sizeof (ClutterVertex4), vertices_tmp, n_vertices); } else { cogl_matrix_transform_points (modelview, 3, sizeof (ClutterVertex), vertices_in, sizeof (ClutterVertex4), vertices_tmp, n_vertices); cogl_matrix_project_points (projection, 3, sizeof (ClutterVertex4), vertices_tmp, sizeof (ClutterVertex4), vertices_tmp, n_vertices); } for (i = 0; i < n_vertices; i++) { ClutterVertex4 vertex_tmp = vertices_tmp[i]; ClutterVertex *vertex_out = &vertices_out[i]; /* Finally translate from OpenGL coords to window coords */ vertex_out->x = MTX_GL_SCALE_X (vertex_tmp.x, vertex_tmp.w, viewport[2], viewport[0]); vertex_out->y = MTX_GL_SCALE_Y (vertex_tmp.y, vertex_tmp.w, viewport[3], viewport[1]); } }
/* Check if we're painting the MetaWindowGroup "untransformed". This can * differ from the result of actor_is_untransformed(window_group) if we're * inside a clone paint. The integer translation, if any, is returned. */ static gboolean painting_untransformed (MetaWindowGroup *window_group, int *x_origin, int *y_origin) { CoglMatrix modelview, projection, modelview_projection; ClutterVertex vertices[4]; int width, height; float viewport[4]; int i; cogl_get_modelview_matrix (&modelview); cogl_get_projection_matrix (&projection); cogl_matrix_multiply (&modelview_projection, &projection, &modelview); meta_screen_get_size (window_group->screen, &width, &height); vertices[0].x = 0; vertices[0].y = 0; vertices[0].z = 0; vertices[1].x = width; vertices[1].y = 0; vertices[1].z = 0; vertices[2].x = 0; vertices[2].y = height; vertices[2].z = 0; vertices[3].x = width; vertices[3].y = height; vertices[3].z = 0; cogl_get_viewport (viewport); for (i = 0; i < 4; i++) { float w = 1; cogl_matrix_transform_point (&modelview_projection, &vertices[i].x, &vertices[i].y, &vertices[i].z, &w); vertices[i].x = MTX_GL_SCALE_X (vertices[i].x, w, viewport[2], viewport[0]); vertices[i].y = MTX_GL_SCALE_Y (vertices[i].y, w, viewport[3], viewport[1]); } return meta_actor_vertices_are_untransformed (vertices, width, height, x_origin, y_origin); }
void _clutter_util_fully_transform_vertices (const CoglMatrix *modelview, const CoglMatrix *projection, const int *viewport, const ClutterVertex *vertices_in, ClutterVertex *vertices_out, int n_vertices) { CoglMatrix modelview_projection; int i; /* XXX: we should find a way to cache this per actor */ cogl_matrix_multiply (&modelview_projection, projection, modelview); for (i = 0; i < n_vertices; i++) { const ClutterVertex *vertex_in = &vertices_in[i]; ClutterVertex *vertex_out = &vertices_out[i]; gfloat x, y, z, w; x = vertex_in->x; y = vertex_in->y; z = vertex_in->z; w = 1.0; /* Transform the point using the modelview matrix */ cogl_matrix_transform_point (&modelview_projection, &x, &y, &z, &w); /* Finally translate from OpenGL coords to window coords */ vertex_out->x = MTX_GL_SCALE_X (x, w, viewport[2], viewport[0]); vertex_out->y = MTX_GL_SCALE_Y (y, w, viewport[3], viewport[1]); vertex_out->z = MTX_GL_SCALE_Z (z, w, viewport[2], viewport[0]); } }