forked from AuroraMiddleware/gtk
164 lines
4.6 KiB
C
164 lines
4.6 KiB
C
/*
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* Copyright © 2011 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkcssimagesurfaceprivate.h"
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G_DEFINE_TYPE (GtkCssImageSurface, _gtk_css_image_surface, GTK_TYPE_CSS_IMAGE)
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static int
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gtk_css_image_surface_get_width (GtkCssImage *image)
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{
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GtkCssImageSurface *surface = GTK_CSS_IMAGE_SURFACE (image);
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return cairo_image_surface_get_width (surface->surface);
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}
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static int
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gtk_css_image_surface_get_height (GtkCssImage *image)
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{
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GtkCssImageSurface *surface = GTK_CSS_IMAGE_SURFACE (image);
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return cairo_image_surface_get_height (surface->surface);
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}
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static void
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gtk_css_image_surface_draw (GtkCssImage *image,
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cairo_t *cr,
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double width,
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double height)
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{
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GtkCssImageSurface *surface = GTK_CSS_IMAGE_SURFACE (image);
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cairo_rectangle (cr, 0, 0, width, height);
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cairo_scale (cr,
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width / cairo_image_surface_get_width (surface->surface),
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height / cairo_image_surface_get_height (surface->surface));
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cairo_set_source_surface (cr, surface->surface, 0, 0);
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cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_PAD);
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cairo_fill (cr);
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}
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static cairo_status_t
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surface_write (void *closure,
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const unsigned char *data,
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unsigned int length)
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{
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g_byte_array_append (closure, data, length);
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return CAIRO_STATUS_SUCCESS;
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}
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static void
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gtk_css_image_surface_print (GtkCssImage *image,
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GString *string)
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{
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#if CAIRO_HAS_PNG_FUNCTIONS
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GtkCssImageSurface *surface = GTK_CSS_IMAGE_SURFACE (image);
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GByteArray *array;
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char *base64;
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array = g_byte_array_new ();
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cairo_surface_write_to_png_stream (surface->surface, surface_write, array);
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base64 = g_base64_encode (array->data, array->len);
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g_byte_array_free (array, TRUE);
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g_string_append (string, "url(\"data:image/png;base64,");
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g_string_append (string, base64);
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g_string_append (string, "\")");
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g_free (base64);
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#else
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g_string_append (string, "none /* you need cairo png functions enabled to make this work */");
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#endif
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}
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static void
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gtk_css_image_surface_dispose (GObject *object)
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{
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GtkCssImageSurface *surface = GTK_CSS_IMAGE_SURFACE (object);
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if (surface->surface)
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{
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cairo_surface_destroy (surface->surface);
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surface->surface = NULL;
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}
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G_OBJECT_CLASS (_gtk_css_image_surface_parent_class)->dispose (object);
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}
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static void
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_gtk_css_image_surface_class_init (GtkCssImageSurfaceClass *klass)
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{
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GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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image_class->get_width = gtk_css_image_surface_get_width;
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image_class->get_height = gtk_css_image_surface_get_height;
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image_class->draw = gtk_css_image_surface_draw;
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image_class->print = gtk_css_image_surface_print;
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object_class->dispose = gtk_css_image_surface_dispose;
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}
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static void
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_gtk_css_image_surface_init (GtkCssImageSurface *image_surface)
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{
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}
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GtkCssImage *
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_gtk_css_image_surface_new (cairo_surface_t *surface)
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{
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GtkCssImage *image;
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g_return_val_if_fail (surface != NULL, NULL);
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image = g_object_new (GTK_TYPE_CSS_IMAGE_SURFACE, NULL);
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GTK_CSS_IMAGE_SURFACE (image)->surface = cairo_surface_reference (surface);
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return image;
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}
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GtkCssImage *
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_gtk_css_image_surface_new_for_pixbuf (GdkPixbuf *pixbuf)
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{
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GtkCssImage *image;
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cairo_surface_t *surface;
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cairo_t *cr;
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g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
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surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
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gdk_pixbuf_get_width (pixbuf),
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gdk_pixbuf_get_height (pixbuf));
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cr = cairo_create (surface);
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gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
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cairo_paint (cr);
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cairo_destroy (cr);
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image = _gtk_css_image_surface_new (surface);
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cairo_surface_destroy (surface);
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return image;
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}
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