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css: Add image implementation for urls

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This commit is contained in:
Benjamin Otte 2011-12-20 08:00:34 +01:00
parent b3389a017a
commit 11ec705133
4 changed files with 283 additions and 1 deletions
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2
gtk/Makefile.am
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@ -413,6 +413,7 @@ gtk_private_h_sources = \
gtkcontainerprivate.h \
gtkcsscustompropertyprivate.h \
gtkcssimageprivate.h \
gtkcssimageurlprivate.h \
gtkcsslookupprivate.h \
gtkcssparserprivate.h \
gtkcssproviderprivate.h \
@ -591,6 +592,7 @@ gtk_base_c_sources = \
gtkcontainer.c \
gtkcsscustomproperty.c \
gtkcssimage.c \
gtkcssimageurl.c \
gtkcsslookup.c \
gtkcssparser.c \
gtkcssprovider.c \

5
gtk/gtkcssimage.c
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@ -22,6 +22,9 @@
#include "gtkcssimageprivate.h"
/* for the types only */
#include "gtk/gtkcssimageurlprivate.h"
G_DEFINE_ABSTRACT_TYPE (GtkCssImage, _gtk_css_image, G_TYPE_OBJECT)
static int
@ -165,7 +168,7 @@ _gtk_css_image_new_parse (GtkCssParser *parser,
g_return_val_if_fail (parser != NULL, NULL);
g_return_val_if_fail (G_IS_FILE (base), NULL);
image = g_object_new (GTK_TYPE_CSS_IMAGE, NULL);
image = g_object_new (GTK_TYPE_CSS_IMAGE_URL, NULL);
klass = GTK_CSS_IMAGE_GET_CLASS (image);
if (!klass->parse (image, parser, base))

223
gtk/gtkcssimageurl.c Normal file
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@ -0,0 +1,223 @@
/*
* 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 "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 GFile *
gtk_css_parse_url (GtkCssParser *parser,
GFile *base)
{
gchar *path;
GFile *file;
if (_gtk_css_parser_try (parser, "url", FALSE))
{
if (!_gtk_css_parser_try (parser, "(", TRUE))
{
_gtk_css_parser_skip_whitespace (parser);
if (_gtk_css_parser_try (parser, "(", TRUE))
{
GError *error;
error = g_error_new_literal (GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_DEPRECATED,
"Whitespace between 'url' and '(' is deprecated");
_gtk_css_parser_take_error (parser, error);
}
else
{
_gtk_css_parser_error (parser, "Expected '(' after 'url'");
return NULL;
}
}
path = _gtk_css_parser_read_string (parser);
if (path == NULL)
return NULL;
if (!_gtk_css_parser_try (parser, ")", TRUE))
{
_gtk_css_parser_error (parser, "No closing ')' found for 'url'");
g_free (path);
return NULL;
}
}
else
{
path = _gtk_css_parser_try_name (parser, TRUE);
if (path == NULL)
{
_gtk_css_parser_error (parser, "Not a valid url");
return NULL;
}
}
file = g_file_resolve_relative_path (base, path);
g_free (path);
return file;
}
static gboolean
gtk_css_image_url_parse (GtkCssImage *image,
GtkCssParser *parser,
GFile *base)
{
GtkCssImageUrl *url = GTK_CSS_IMAGE_URL (image);
GdkPixbuf *pixbuf;
GFile *file;
char *path;
cairo_t *cr;
GError *error = NULL;
file = gtk_css_parse_url (parser, base);
if (file == NULL)
return FALSE;
path = g_file_get_path (file);
g_object_unref (file);
pixbuf = gdk_pixbuf_new_from_file (path, &error);
g_free (path);
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);
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)
{
}

54
gtk/gtkcssimageurlprivate.h Normal file
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@ -0,0 +1,54 @@
/*
* 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>
*/
#ifndef __GTK_CSS_IMAGE_URL_PRIVATE_H__
#define __GTK_CSS_IMAGE_URL_PRIVATE_H__
#include "gtk/gtkcssimageprivate.h"
G_BEGIN_DECLS
#define GTK_TYPE_CSS_IMAGE_URL (_gtk_css_image_url_get_type ())
#define GTK_CSS_IMAGE_URL(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE_URL, GtkCssImageUrl))
#define GTK_CSS_IMAGE_URL_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE_URL, GtkCssImageUrlClass))
#define GTK_IS_CSS_IMAGE_URL(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE_URL))
#define GTK_IS_CSS_IMAGE_URL_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE_URL))
#define GTK_CSS_IMAGE_URL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE_URL, GtkCssImageUrlClass))
typedef struct _GtkCssImageUrl GtkCssImageUrl;
typedef struct _GtkCssImageUrlClass GtkCssImageUrlClass;
struct _GtkCssImageUrl
{
GtkCssImage parent;
cairo_surface_t *surface; /* the surface we render - guaranteed to be an image surface */
};
struct _GtkCssImageUrlClass
{
GtkCssImageClass parent_class;
};
GType _gtk_css_image_url_get_type (void) G_GNUC_CONST;
G_END_DECLS
#endif /* __GTK_CSS_IMAGE_URL_PRIVATE_H__ */