static void
gtk_scaler_paintable_snapshot (GdkPaintable *paintable,
GdkSnapshot *snapshot,
double width,
double height)
{
GtkScaler *self = GTK_SCALER (paintable);
if (self->scale_factor == 1.0)
{
gdk_paintable_snapshot (self->paintable, snapshot, width, height);
}
else
{
graphene_matrix_t scale_matrix;
graphene_matrix_init_scale (&scale_matrix, 1.0 / self->scale_factor, 1.0 / self->scale_factor, 1.0);
gtk_snapshot_push_transform (snapshot, &scale_matrix);
gdk_paintable_snapshot (self->paintable,
snapshot,
width * self->scale_factor,
height * self->scale_factor);
gtk_snapshot_pop (snapshot);
}
}
static void
gst_gl_transformation_build_mvp (GstGLTransformation * transformation)
{
graphene_point3d_t translation_vector =
GRAPHENE_POINT3D_INIT (transformation->xtranslation * 2.0 *
transformation->aspect,
transformation->ytranslation * 2.0,
transformation->ztranslation * 2.0);
graphene_matrix_t model_matrix;
graphene_matrix_t projection_matrix;
graphene_matrix_t view_matrix;
graphene_matrix_t vp_matrix;
graphene_vec3_t eye;
graphene_vec3_t center;
graphene_vec3_t up;
graphene_vec3_init (&eye, 0.f, 0.f, 1.f);
graphene_vec3_init (¢er, 0.f, 0.f, 0.f);
graphene_vec3_init (&up, 0.f, 1.f, 0.f);
graphene_matrix_init_scale (&model_matrix,
transformation->xscale, transformation->yscale, 1.0f);
graphene_matrix_rotate (&model_matrix,
transformation->xrotation, graphene_vec3_x_axis ());
graphene_matrix_rotate (&model_matrix,
transformation->yrotation, graphene_vec3_y_axis ());
graphene_matrix_rotate (&model_matrix,
transformation->zrotation, graphene_vec3_z_axis ());
graphene_matrix_translate (&model_matrix, &translation_vector);
if (transformation->ortho) {
graphene_matrix_init_ortho (&projection_matrix,
-transformation->aspect, transformation->aspect,
-1, 1, transformation->znear, transformation->zfar);
} else {
graphene_matrix_init_perspective (&projection_matrix,
transformation->fov,
transformation->aspect, transformation->znear, transformation->zfar);
}
graphene_matrix_init_look_at (&view_matrix, &eye, ¢er, &up);
graphene_matrix_multiply (&view_matrix, &projection_matrix, &vp_matrix);
graphene_matrix_multiply (&model_matrix, &vp_matrix,
&transformation->mvp_matrix);
}
static void
gtk_render_node_paintable_paintable_snapshot (GdkPaintable *paintable,
GdkSnapshot *snapshot,
double width,
double height)
{
GtkRenderNodePaintable *self = GTK_RENDER_NODE_PAINTABLE (paintable);
gboolean needs_transform;
needs_transform = self->bounds.size.width != width ||
self->bounds.size.height != height;
if (needs_transform)
{
graphene_matrix_t transform;
graphene_matrix_init_scale (&transform,
width / (self->bounds.size.width),
height / (self->bounds.size.height),
1.0);
gtk_snapshot_push_transform (snapshot,
&transform);
}
gtk_snapshot_offset (snapshot, -self->bounds.origin.x, -self->bounds.origin.y);
gtk_snapshot_push_clip (snapshot, &self->bounds);
gtk_snapshot_append_node (snapshot, self->node);
//gtk_snapshot_append_color (snapshot, &(GdkRGBA) { 1, 0, 0, 1 }, &self->bounds);
gtk_snapshot_pop (snapshot);
gtk_snapshot_offset (snapshot, self->bounds.origin.x, self->bounds.origin.y);
if (needs_transform)
gtk_snapshot_pop (snapshot);
}