void
lsm_dom_view_render (LsmDomView *view, cairo_t *cairo, double x, double y)
{
LsmDomViewClass *view_class;
g_return_if_fail (LSM_IS_DOM_VIEW (view));
g_return_if_fail (LSM_IS_DOM_DOCUMENT (view->document));
g_return_if_fail (cairo != NULL);
lsm_dom_view_set_cairo_context (view, cairo);
cairo_save (view->cairo);
cairo_translate (view->cairo, x, y);
view_class = LSM_DOM_VIEW_GET_CLASS (view);
if (view_class->render != NULL)
view_class->render (view);
cairo_restore (view->cairo);
lsm_debug_render ("[LsmDomView::render] cairo status = %s",
cairo_status_to_string (cairo_status (view->cairo)));
lsm_dom_view_set_cairo_context (view, NULL);
}
double
lsm_dom_view_get_resolution (LsmDomView *self)
{
g_return_val_if_fail (LSM_IS_DOM_VIEW (self), 0.0);
return self->resolution_ppi;
}
void
lsm_dom_view_get_size_pixels (LsmDomView *view, unsigned int *width, unsigned int *height, unsigned int *baseline)
{
double resolution_ppi;
double width_pt;
double height_pt;
double baseline_pt;
g_return_if_fail (LSM_IS_DOM_VIEW (view));
g_return_if_fail (view->document != NULL);
resolution_ppi = view->resolution_ppi;
g_return_if_fail (resolution_ppi > 0.0);
width_pt = width != NULL ? *width * 72.0 / resolution_ppi : 0.0;
height_pt = height != NULL ? *height * 72.0 / resolution_ppi : 0.0;
baseline_pt = baseline != NULL? *baseline * 72.0 /resolution_ppi : 0.0;
lsm_dom_view_get_size (view, &width_pt, &height_pt,&baseline_pt);
if (width != NULL)
*width = (double) (0.5 + width_pt * resolution_ppi / 72.0);
if (height != NULL)
*height = (double) (0.5 + height_pt * resolution_ppi / 72.0);
if (baseline != NULL)
*baseline = (double) (0.5 + baseline_pt * resolution_ppi / 72.0);
}
void
lsm_dom_view_set_viewport (LsmDomView *self, const LsmBox *viewport_pt)
{
g_return_if_fail (LSM_IS_DOM_VIEW (self));
g_return_if_fail (viewport_pt != NULL);
self->viewport_pt = *viewport_pt;
}
LsmBox
lsm_dom_view_get_viewport (LsmDomView *self)
{
static const LsmBox null_viewport = {0, 0, 0, 0};
g_return_val_if_fail (LSM_IS_DOM_VIEW (self), null_viewport);
return self->viewport_pt;
}
void
lsm_dom_view_set_resolution (LsmDomView *self, double ppi)
{
g_return_if_fail (LSM_IS_DOM_VIEW (self));
if (ppi < 0.0)
self->resolution_ppi = LSM_DOM_VIEW_DEFAULT_RESOLUTION;
else
self->resolution_ppi = ppi;
}
void
lsm_dom_view_set_viewport_pixels (LsmDomView *self, const LsmBox *viewport)
{
g_return_if_fail (LSM_IS_DOM_VIEW (self));
g_return_if_fail (viewport != NULL);
self->viewport_pt.x = viewport->x * 72.0 / self->resolution_ppi;
self->viewport_pt.y = viewport->y * 72.0 / self->resolution_ppi;
self->viewport_pt.width = viewport->width * 72.0 / self->resolution_ppi;
self->viewport_pt.height = viewport->height * 72.0 / self->resolution_ppi;
}
static void
render_test (gconstpointer user_data)
{
const char *filename = user_data;
char *basename;
LsmDomDocument *document;
LsmDomView *view;
LsmBox viewport;
unsigned int width, height;
cairo_t *cairo;
cairo_surface_t *surface;
basename = g_path_get_basename (filename);
document = lsm_dom_document_new_from_path (filename, NULL);
g_assert (LSM_IS_DOM_DOCUMENT (document));
view = lsm_dom_document_create_view (document);
g_assert (LSM_IS_DOM_VIEW (view));
viewport.x = 0.0;
viewport.y = 0.0;
viewport.width = 480.0;
viewport.height = 360.0;
lsm_dom_view_set_resolution (view, 96);
lsm_dom_view_set_viewport_pixels (view, &viewport);
lsm_dom_view_get_size_pixels (LSM_DOM_VIEW (view), &width, &height, NULL);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
cairo = cairo_create (surface);
cairo_surface_destroy (surface);
if (cairo_status (cairo) == CAIRO_STATUS_SUCCESS) {
lsm_dom_view_render (LSM_DOM_VIEW (view), cairo, 1, 1);
if (cairo_status (cairo) != CAIRO_STATUS_SUCCESS) {
g_test_message ("cairo_status = %s", cairo_status_to_string (cairo_status (cairo)));
if (!g_key_file_get_boolean (suite_options, basename, "ignore-cairo-status", NULL)) {
g_test_message ("incorrect cairo status");
g_test_fail ();
}
}
}
cairo_destroy (cairo);
g_object_unref (view);
g_object_unref (document);
g_free (basename);
}
void
lsm_dom_view_set_debug (LsmDomView *view, const char *feature, gboolean enable)
{
LsmDomViewClass *view_class;
g_return_if_fail (LSM_IS_DOM_VIEW (view));
g_return_if_fail (feature != NULL);
view_class = LSM_DOM_VIEW_GET_CLASS (view);
if (view_class->set_debug)
view_class->set_debug (view, feature, enable);
}
static void
lsm_dom_view_set_cairo_context (LsmDomView *view, cairo_t *cairo)
{
PangoContext *context;
cairo_font_options_t *font_options;
const cairo_font_options_t *current_font_options;
cairo_surface_t *surface;
cairo_surface_type_t type;
g_return_if_fail (LSM_IS_DOM_VIEW (view));
if (view->cairo == cairo)
return;
if (view->cairo != NULL) {
cairo_destroy (view->cairo);
g_object_unref (view->pango_layout);
}
if (cairo == NULL) {
view->cairo = NULL;
view->pango_layout = NULL;
return;
}
cairo_reference (cairo);
view->cairo = cairo;
view->pango_layout = pango_cairo_create_layout (cairo);
surface = cairo_get_target (cairo);
type = cairo_surface_get_type (surface);
view->is_vector = (type == CAIRO_SURFACE_TYPE_SVG ||
type == CAIRO_SURFACE_TYPE_PDF ||
type == CAIRO_SURFACE_TYPE_PS);
context = pango_layout_get_context (view->pango_layout);
pango_cairo_context_set_resolution (context, 72);
current_font_options = pango_cairo_context_get_font_options (context);
if (current_font_options == NULL)
font_options = cairo_font_options_create ();
else
font_options = cairo_font_options_copy (current_font_options);
cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF);
pango_cairo_context_set_font_options (context, font_options);
cairo_font_options_destroy (font_options);
}
LsmBox
lsm_dom_view_get_viewport_pixels (LsmDomView *self)
{
LsmBox viewport = {0, 0, 0, 0};
g_return_val_if_fail (LSM_IS_DOM_VIEW (self), viewport);
viewport.x = self->viewport_pt.x * self->resolution_ppi / 72.0;
viewport.y = self->viewport_pt.y * self->resolution_ppi / 72.0;
viewport.width = self->viewport_pt.width * self->resolution_ppi / 72.0;
viewport.height = self->viewport_pt.height * self->resolution_ppi / 72.0;
return viewport;
}
void
lsm_dom_view_set_document (LsmDomView *view, LsmDomDocument *document)
{
g_return_if_fail (LSM_IS_DOM_VIEW (view));
g_return_if_fail (document == NULL || LSM_IS_DOM_DOCUMENT (document));
if (view->document == document)
return;
if (view->document != NULL)
g_object_unref (view->document);
if (document != NULL)
g_object_ref (document);
view->document = document;
}
void
lsm_dom_view_get_size (LsmDomView *view, double *width, double *height, double *baseline)
{
LsmDomViewClass *view_class;
double dummy_width = 0.0;
double dummy_height = 0.0;
g_return_if_fail (LSM_IS_DOM_VIEW (view));
g_return_if_fail (view->document != NULL);
if (width == NULL)
width = &dummy_width;
if (height == NULL)
height = &dummy_height;
view_class = LSM_DOM_VIEW_GET_CLASS (view);
if (view_class->measure != NULL)
view_class->measure (view, width, height, baseline);
}
static void
render_test (gconstpointer user_data)
{
const char *filename = user_data;
LsmDomDocument *document;
LsmDomView *view;
LsmBox viewport;
unsigned int width, height;
cairo_t *cairo;
cairo_surface_t *surface;
document = lsm_dom_document_new_from_path (filename, NULL);
g_assert (LSM_IS_DOM_DOCUMENT (document));
view = lsm_dom_document_create_view (document);
g_assert (LSM_IS_DOM_VIEW (view));
viewport.x = 0.0;
viewport.y = 0.0;
viewport.width = 480.0;
viewport.height = 360.0;
lsm_dom_view_set_resolution (view, 96);
lsm_dom_view_set_viewport_pixels (view, &viewport);
lsm_dom_view_get_size_pixels (LSM_DOM_VIEW (view), &width, &height, NULL);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
cairo = cairo_create (surface);
cairo_surface_destroy (surface);
if (cairo_status (cairo) == CAIRO_STATUS_SUCCESS) {
lsm_dom_view_render (LSM_DOM_VIEW (view), cairo, 1, 1);
g_assert (cairo_status (cairo) == CAIRO_STATUS_SUCCESS);
}
cairo_destroy (cairo);
g_object_unref (view);
g_object_unref (document);
}