static gboolean
gtk_css_image_gradient_parse (GtkCssImage *image,
GtkCssParser *parser)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
gradient->gradient = _gtk_gradient_parse (parser);
return gradient->gradient != NULL;
}
static void
gtk_css_image_gradient_print (GtkCssImage *image,
GString *string)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
char *s;
s = gtk_gradient_to_string (gradient->gradient);
g_string_append (string, s);
g_free (s);
}
static GtkCssImage *
gtk_css_image_gradient_transition (GtkCssImage *start_image,
GtkCssImage *end_image,
guint property_id,
double progress)
{
GtkGradient *start_gradient, *end_gradient, *gradient;
cairo_pattern_t *start_pattern, *end_pattern;
GtkCssImageGradient *result;
start_gradient = GTK_CSS_IMAGE_GRADIENT (start_image)->gradient;
start_pattern = GTK_CSS_IMAGE_GRADIENT (start_image)->pattern;
if (end_image == NULL)
{
end_gradient = NULL;
end_pattern = NULL;
}
else
{
if (!GTK_IS_CSS_IMAGE_GRADIENT (end_image))
return GTK_CSS_IMAGE_CLASS (_gtk_css_image_gradient_parent_class)->transition (start_image, end_image, property_id, progress);
end_gradient = GTK_CSS_IMAGE_GRADIENT (end_image)->gradient;
end_pattern = GTK_CSS_IMAGE_GRADIENT (end_image)->pattern;
}
gradient = _gtk_gradient_transition (start_gradient, end_gradient, property_id, progress);
if (gradient == NULL)
return GTK_CSS_IMAGE_CLASS (_gtk_css_image_gradient_parent_class)->transition (start_image, end_image, property_id, progress);
result = g_object_new (GTK_TYPE_CSS_IMAGE_GRADIENT, NULL);
result->gradient = gradient;
result->pattern = transition_pattern (start_pattern, end_pattern, progress);
return GTK_CSS_IMAGE (result);
}
static GtkCssImage *
gtk_css_image_gradient_compute (GtkCssImage *image,
GtkStyleContext *context)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
GtkCssImageGradient *copy;
if (gradient->pattern)
return g_object_ref (gradient);
copy = g_object_new (GTK_TYPE_CSS_IMAGE_GRADIENT, NULL);
copy->gradient = gtk_gradient_ref (gradient->gradient);
copy->pattern = gtk_gradient_resolve_for_context (copy->gradient, context);
return GTK_CSS_IMAGE (copy);
}
static void
gtk_css_image_gradient_dispose (GObject *object)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (object);
if (gradient->gradient)
{
gtk_gradient_unref (gradient->gradient);
gradient->gradient = NULL;
}
if (gradient->pattern)
{
cairo_pattern_destroy (gradient->pattern);
gradient->pattern = NULL;
}
G_OBJECT_CLASS (_gtk_css_image_gradient_parent_class)->dispose (object);
}
static void
gtk_css_image_gradient_draw (GtkCssImage *image,
cairo_t *cr,
double width,
double height)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
if (!gradient->pattern)
{
g_warning ("trying to paint unresolved gradient");
return;
}
cairo_scale (cr, width, height);
cairo_rectangle (cr, 0, 0, 1, 1);
cairo_set_source (cr, gradient->pattern);
cairo_fill (cr);
}
static GtkCssImage *
gtk_css_image_gradient_compute (GtkCssImage *image,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssComputedValues *values,
GtkCssComputedValues *parent_values,
GtkCssDependencies *dependencies)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
GtkCssImageGradient *copy;
if (gradient->pattern)
return g_object_ref (gradient);
copy = g_object_new (GTK_TYPE_CSS_IMAGE_GRADIENT, NULL);
copy->gradient = gtk_gradient_ref (gradient->gradient);
copy->pattern = _gtk_gradient_resolve_full (copy->gradient, provider, values, parent_values, dependencies);
return GTK_CSS_IMAGE (copy);
}