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/*
* Copyright © 2011 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include <string.h>
#include "gtkcssimageurlprivate.h"
#include "gtkcssprovider.h"
G_DEFINE_TYPE (GtkCssImageUrl, _gtk_css_image_url, GTK_TYPE_CSS_IMAGE)
static int
gtk_css_image_url_get_width (GtkCssImage *image)
{
GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
return cairo_image_surface_get_width (url->surface);
}
static int
gtk_css_image_url_get_height (GtkCssImage *image)
{
GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
return cairo_image_surface_get_height (url->surface);
}
static void
gtk_css_image_url_draw (GtkCssImage *image,
cairo_t *cr,
double width,
double height)
{
GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
cairo_rectangle (cr, 0, 0, width, height);
cairo_scale (cr,
width / cairo_image_surface_get_width (url->surface),
height / cairo_image_surface_get_height (url->surface));
cairo_set_source_surface (cr, url->surface, 0, 0);
cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_PAD);
cairo_fill (cr);
}
static gboolean
gtk_css_image_url_parse (GtkCssImage *image,
GtkCssParser *parser,
GFile *base)
{
GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
GdkPixbuf *pixbuf;
GFile *file;
cairo_t *cr;
GError *error = NULL;
GFileInputStream *input;
file = _gtk_css_parser_read_url (parser, base);
if (file == NULL)
return FALSE;
/* We special case resources here so we can use
gdk_pixbuf_new_from_resource, which in turn has some special casing
for GdkPixdata files to avoid duplicating the memory for the pixbufs */
if (g_file_has_uri_scheme (file, "resource"))
{
char *uri = g_file_get_uri (file);
char *resource_path = g_uri_unescape_string (uri + strlen ("resource://"), NULL);
g_print ("uri: %s, resource_path: %s\n", uri, resource_path);
pixbuf = gdk_pixbuf_new_from_resource (resource_path, &error);
g_free (resource_path);
g_free (uri);
}
else
{
input = g_file_read (file, NULL, &error);
if (input == NULL)
{
_gtk_css_parser_take_error (parser, error);
return FALSE;
}
g_object_unref (file);
pixbuf = gdk_pixbuf_new_from_stream (G_INPUT_STREAM (input), NULL, &error);
g_object_unref (input);
}
if (pixbuf == NULL)
{
_gtk_css_parser_take_error (parser, error);
return FALSE;
}
url->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf));
cr = cairo_create (url->surface);
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
g_object_unref (pixbuf);
return TRUE;
}
static cairo_status_t
surface_write (void *closure,
const unsigned char *data,
unsigned int length)
{
g_byte_array_append (closure, data, length);
return CAIRO_STATUS_SUCCESS;
}
static void
gtk_css_image_url_print (GtkCssImage *image,
GString *string)
{
#if CAIRO_HAS_PNG_FUNCTIONS
GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
GByteArray *array;
char *base64;
array = g_byte_array_new ();
cairo_surface_write_to_png_stream (url->surface, surface_write, array);
base64 = g_base64_encode (array->data, array->len);
g_byte_array_free (array, TRUE);
g_string_append (string, "url(\"data:image/png;base64,");
g_string_append (string, base64);
g_string_append (string, "\")");
g_free (base64);
#else
g_string_append (string, "none /* you need cairo png functions enabled to make this work */");
#endif
}
static void
gtk_css_image_url_dispose (GObject *object)
{
GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (object);
if (url->surface)
{
cairo_surface_destroy (url->surface);
url->surface = NULL;
}
G_OBJECT_CLASS (_gtk_css_image_url_parent_class)->dispose (object);
}
static void
_gtk_css_image_url_class_init (GtkCssImageUrlClass *klass)
{
GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
image_class->get_width = gtk_css_image_url_get_width;
image_class->get_height = gtk_css_image_url_get_height;
image_class->draw = gtk_css_image_url_draw;
image_class->parse = gtk_css_image_url_parse;
image_class->print = gtk_css_image_url_print;
object_class->dispose = gtk_css_image_url_dispose;
}
static void
_gtk_css_image_url_init (GtkCssImageUrl *image_url)
{
}
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