740 lines
20 KiB
C
740 lines
20 KiB
C
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/* Copyright (C) 2016 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 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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#include "config.h"
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#include <gdk/gdk.h>
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#include "gdktextureutilsprivate.h"
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#include "gtkscalerprivate.h"
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#include "gdk/gdktextureprivate.h"
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/* {{{ Pixbuf helpers */
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static GdkPixbuf *
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load_from_stream (GdkPixbufLoader *loader,
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GInputStream *stream,
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GCancellable *cancellable,
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GError **error)
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{
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GdkPixbuf *pixbuf;
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gssize n_read;
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guchar buffer[65536];
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gboolean res;
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res = TRUE;
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while (1)
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{
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n_read = g_input_stream_read (stream, buffer, sizeof (buffer), cancellable, error);
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if (n_read < 0)
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{
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res = FALSE;
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error = NULL; /* Ignore further errors */
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break;
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}
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if (n_read == 0)
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break;
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if (!gdk_pixbuf_loader_write (loader, buffer, n_read, error))
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{
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res = FALSE;
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error = NULL;
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break;
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}
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}
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if (!gdk_pixbuf_loader_close (loader, error))
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{
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res = FALSE;
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error = NULL;
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}
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pixbuf = NULL;
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if (res)
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{
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pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
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if (pixbuf)
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g_object_ref (pixbuf);
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}
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return pixbuf;
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}
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static void
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size_prepared_cb (GdkPixbufLoader *loader,
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int width,
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int height,
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gpointer data)
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{
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double *scale = data;
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width = MAX (*scale * width, 1);
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height = MAX (*scale * height, 1);
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gdk_pixbuf_loader_set_size (loader, width, height);
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}
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/* Like gdk_pixbuf_new_from_stream_at_scale, but
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* load the image at its original size times the
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* given scale.
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*/
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static GdkPixbuf *
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_gdk_pixbuf_new_from_stream_scaled (GInputStream *stream,
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double scale,
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GCancellable *cancellable,
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GError **error)
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{
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GdkPixbufLoader *loader;
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GdkPixbuf *pixbuf;
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loader = gdk_pixbuf_loader_new ();
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if (scale != 0)
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g_signal_connect (loader, "size-prepared",
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G_CALLBACK (size_prepared_cb), &scale);
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pixbuf = load_from_stream (loader, stream, cancellable, error);
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g_object_unref (loader);
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return pixbuf;
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}
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static void
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size_prepared_cb2 (GdkPixbufLoader *loader,
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int width,
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int height,
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gpointer data)
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{
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int *scales = data;
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if (scales[2]) /* keep same aspect ratio as original, while fitting in given size */
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{
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double aspect = (double) height / width;
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/* First use given width and calculate size */
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width = scales[0];
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height = scales[0] * aspect;
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/* Check if it fits given height, otherwise scale down */
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if (height > scales[1])
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{
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width *= (double) scales[1] / height;
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height = scales[1];
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}
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}
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else
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{
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width = scales[0];
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height = scales[1];
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}
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gdk_pixbuf_loader_set_size (loader, width, height);
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}
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static GdkPixbuf *
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_gdk_pixbuf_new_from_stream_at_scale (GInputStream *stream,
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int width,
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int height,
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gboolean aspect,
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GCancellable *cancellable,
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GError **error)
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{
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GdkPixbufLoader *loader;
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GdkPixbuf *pixbuf;
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int scales[3];
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loader = gdk_pixbuf_loader_new ();
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scales[0] = width;
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scales[1] = height;
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scales[2] = aspect;
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g_signal_connect (loader, "size-prepared",
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G_CALLBACK (size_prepared_cb2), scales);
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pixbuf = load_from_stream (loader, stream, cancellable, error);
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g_object_unref (loader);
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return pixbuf;
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}
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static GdkPixbuf *
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_gdk_pixbuf_new_from_resource_at_scale (const char *resource_path,
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int width,
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int height,
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gboolean preserve_aspect,
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GError **error)
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{
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GInputStream *stream;
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GdkPixbuf *pixbuf;
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stream = g_resources_open_stream (resource_path, 0, error);
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if (stream == NULL)
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return NULL;
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pixbuf = _gdk_pixbuf_new_from_stream_at_scale (stream, width, height, preserve_aspect, NULL, error);
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g_object_unref (stream);
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return pixbuf;
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}
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/* }}} */
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/* {{{ Symbolic processing */
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static GdkPixbuf *
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load_symbolic_svg (const char *escaped_file_data,
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int width,
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int height,
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const char *icon_width_str,
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const char *icon_height_str,
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const char *fg_string,
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const char *success_color_string,
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const char *warning_color_string,
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const char *error_color_string,
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GError **error)
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{
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GInputStream *stream;
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GdkPixbuf *pixbuf;
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char *data;
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data = g_strconcat ("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n"
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"<svg version=\"1.1\"\n"
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" xmlns=\"http://www.w3.org/2000/svg\"\n"
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" xmlns:xi=\"http://www.w3.org/2001/XInclude\"\n"
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" width=\"", icon_width_str, "\"\n"
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" height=\"", icon_height_str, "\">\n"
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" <style type=\"text/css\">\n"
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" rect,circle,path {\n"
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" fill: ", fg_string," !important;\n"
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" }\n"
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" .warning {\n"
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" fill: ", warning_color_string, " !important;\n"
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" }\n"
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" .error {\n"
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" fill: ", error_color_string ," !important;\n"
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" }\n"
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" .success {\n"
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" fill: ", success_color_string, " !important;\n"
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" }\n"
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" </style>\n"
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" <xi:include href=\"data:text/xml;base64,", escaped_file_data, "\"/>\n"
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"</svg>",
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NULL);
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stream = g_memory_input_stream_new_from_data (data, -1, g_free);
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pixbuf = gdk_pixbuf_new_from_stream_at_scale (stream, width, height, TRUE, NULL, error);
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g_object_unref (stream);
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return pixbuf;
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}
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static void
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extract_plane (GdkPixbuf *src,
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GdkPixbuf *dst,
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int from_plane,
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int to_plane)
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{
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guchar *src_data, *dst_data;
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int width, height;
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gsize src_stride, dst_stride;
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guchar *src_row, *dst_row;
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int x, y;
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width = gdk_pixbuf_get_width (src);
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height = gdk_pixbuf_get_height (src);
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g_assert (width <= gdk_pixbuf_get_width (dst));
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g_assert (height <= gdk_pixbuf_get_height (dst));
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src_stride = gdk_pixbuf_get_rowstride (src);
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src_data = gdk_pixbuf_get_pixels (src);
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dst_data = gdk_pixbuf_get_pixels (dst);
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dst_stride = gdk_pixbuf_get_rowstride (dst);
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for (y = 0; y < height; y++)
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{
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src_row = src_data + src_stride * y;
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dst_row = dst_data + dst_stride * y;
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for (x = 0; x < width; x++)
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{
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dst_row[to_plane] = src_row[from_plane];
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src_row += 4;
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dst_row += 4;
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}
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}
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}
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GdkPixbuf *
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gtk_make_symbolic_pixbuf_from_data (const char *file_data,
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gsize file_len,
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int width,
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int height,
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double scale,
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const char *debug_output_basename,
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GError **error)
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{
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const char *r_string = "rgb(255,0,0)";
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const char *g_string = "rgb(0,255,0)";
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char *icon_width_str;
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char *icon_height_str;
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GdkPixbuf *loaded;
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GdkPixbuf *pixbuf = NULL;
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int plane;
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int icon_width, icon_height;
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char *escaped_file_data;
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/* Fetch size from the original icon */
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GInputStream *stream = g_memory_input_stream_new_from_data (file_data, file_len, NULL);
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GdkPixbuf *reference = gdk_pixbuf_new_from_stream (stream, NULL, error);
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g_object_unref (stream);
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if (!reference)
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return NULL;
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icon_width = gdk_pixbuf_get_width (reference);
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icon_height = gdk_pixbuf_get_height (reference);
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g_object_unref (reference);
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escaped_file_data = g_base64_encode ((guchar *) file_data, file_len);
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icon_width_str = g_strdup_printf ("%d", icon_width);
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icon_height_str = g_strdup_printf ("%d", icon_height);
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if (width == 0)
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width = icon_width * scale;
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if (height == 0)
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height = icon_height * scale;
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for (plane = 0; plane < 3; plane++)
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{
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/* Here we render the svg with all colors solid, this should
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* always make the alpha channel the same and it should match
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* the final alpha channel for all possible renderings. We
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* Just use it as-is for final alpha.
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*
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* For the 3 non-fg colors, we render once each with that
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* color as red, and every other color as green. The resulting
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* red will describe the amount of that color is in the
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* opaque part of the color. We store these as the rgb
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* channels, with the color of the fg being implicitly
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* the "rest", as all color fractions should add up to 1.
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*/
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loaded = load_symbolic_svg (escaped_file_data, width, height,
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icon_width_str,
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icon_height_str,
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g_string,
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plane == 0 ? r_string : g_string,
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plane == 1 ? r_string : g_string,
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plane == 2 ? r_string : g_string,
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error);
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if (loaded == NULL)
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goto out;
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if (debug_output_basename)
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{
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char *filename;
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filename = g_strdup_printf ("%s.debug%d.png", debug_output_basename, plane);
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g_print ("Writing %s\n", filename);
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gdk_pixbuf_save (loaded, filename, "png", NULL, NULL);
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g_free (filename);
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}
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if (pixbuf == NULL)
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{
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pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
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gdk_pixbuf_get_width (loaded),
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gdk_pixbuf_get_height (loaded));
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gdk_pixbuf_fill (pixbuf, 0);
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}
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if (plane == 0)
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extract_plane (loaded, pixbuf, 3, 3);
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extract_plane (loaded, pixbuf, 0, plane);
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g_object_unref (loaded);
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}
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g_free (escaped_file_data);
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out:
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g_free (icon_width_str);
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g_free (icon_height_str);
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return pixbuf;
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}
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static GdkPixbuf *
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make_symbolic_pixbuf_from_resource (const char *path,
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int width,
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int height,
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double scale,
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GError **error)
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{
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GBytes *bytes;
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const char *data;
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gsize size;
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GdkPixbuf *pixbuf;
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bytes = g_resources_lookup_data (path, G_RESOURCE_LOOKUP_FLAGS_NONE, error);
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if (bytes == NULL)
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return NULL;
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data = g_bytes_get_data (bytes, &size);
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pixbuf = gtk_make_symbolic_pixbuf_from_data (data, size, width, height, scale, NULL, error);
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g_bytes_unref (bytes);
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return pixbuf;
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}
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static GdkPixbuf *
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make_symbolic_pixbuf_from_path (const char *path,
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int width,
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int height,
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double scale,
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GError **error)
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{
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char *data;
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gsize size;
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GdkPixbuf *pixbuf;
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if (!g_file_get_contents (path, &data, &size, error))
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return NULL;
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pixbuf = gtk_make_symbolic_pixbuf_from_data (data, size, width, height, scale, NULL, error);
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g_free (data);
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return pixbuf;
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}
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static GdkPixbuf *
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make_symbolic_pixbuf_from_file (GFile *file,
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int width,
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int height,
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double scale,
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GError **error)
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{
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char *data;
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gsize size;
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GdkPixbuf *pixbuf;
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if (!g_file_load_contents (file, NULL, &data, &size, NULL, error))
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return NULL;
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pixbuf = gtk_make_symbolic_pixbuf_from_data (data, size, width, height, scale, NULL, error);
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g_free (data);
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return pixbuf;
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}
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/* }}} */
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/* {{{ Texture API */
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GdkTexture *
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gdk_texture_new_from_stream_at_scale (GInputStream *stream,
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int width,
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int height,
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gboolean aspect,
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GCancellable *cancellable,
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GError **error)
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{
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GdkPixbuf *pixbuf;
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GdkTexture *texture = NULL;
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||
|
|
||
|
pixbuf = _gdk_pixbuf_new_from_stream_at_scale (stream, width, height, aspect, cancellable, error);
|
||
|
if (pixbuf)
|
||
|
{
|
||
|
texture = gdk_texture_new_for_pixbuf (pixbuf);
|
||
|
g_object_unref (pixbuf);
|
||
|
}
|
||
|
|
||
|
return texture;
|
||
|
}
|
||
|
|
||
|
GdkTexture *
|
||
|
gdk_texture_new_from_stream (GInputStream *stream,
|
||
|
GCancellable *cancellable,
|
||
|
GError **error)
|
||
|
{
|
||
|
GdkPixbuf *pixbuf;
|
||
|
GdkTexture *texture = NULL;
|
||
|
|
||
|
pixbuf = _gdk_pixbuf_new_from_stream_scaled (stream, 0, cancellable, error);
|
||
|
if (pixbuf)
|
||
|
{
|
||
|
texture = gdk_texture_new_for_pixbuf (pixbuf);
|
||
|
g_object_unref (pixbuf);
|
||
|
}
|
||
|
|
||
|
return texture;
|
||
|
}
|
||
|
|
||
|
GdkTexture *
|
||
|
gdk_texture_new_from_resource_at_scale (const char *path,
|
||
|
int width,
|
||
|
int height,
|
||
|
gboolean preserve_aspect,
|
||
|
GError **error)
|
||
|
{
|
||
|
GdkPixbuf *pixbuf;
|
||
|
GdkTexture *texture = NULL;
|
||
|
|
||
|
pixbuf = _gdk_pixbuf_new_from_resource_at_scale (path, width, height, preserve_aspect, error);
|
||
|
if (pixbuf)
|
||
|
{
|
||
|
texture = gdk_texture_new_for_pixbuf (pixbuf);
|
||
|
g_object_unref (pixbuf);
|
||
|
}
|
||
|
|
||
|
return texture;
|
||
|
}
|
||
|
|
||
|
/* }}} */
|
||
|
/* {{{ Symbolic texture API */
|
||
|
|
||
|
GdkTexture *
|
||
|
gdk_texture_new_from_path_symbolic (const char *path,
|
||
|
int width,
|
||
|
int height,
|
||
|
double scale,
|
||
|
GError **error)
|
||
|
{
|
||
|
GdkPixbuf *pixbuf;
|
||
|
GdkTexture *texture = NULL;
|
||
|
|
||
|
pixbuf = make_symbolic_pixbuf_from_path (path, width, height, scale, error);
|
||
|
if (pixbuf)
|
||
|
{
|
||
|
texture = gdk_texture_new_for_pixbuf (pixbuf);
|
||
|
g_object_unref (pixbuf);
|
||
|
}
|
||
|
|
||
|
return texture;
|
||
|
}
|
||
|
|
||
|
GdkTexture *
|
||
|
gtk_load_symbolic_texture_from_resource (const char *path)
|
||
|
{
|
||
|
return gdk_texture_new_from_resource (path);
|
||
|
}
|
||
|
|
||
|
GdkTexture *
|
||
|
gdk_texture_new_from_resource_symbolic (const char *path,
|
||
|
int width,
|
||
|
int height,
|
||
|
double scale,
|
||
|
GError **error)
|
||
|
{
|
||
|
GdkPixbuf *pixbuf;
|
||
|
GdkTexture *texture = NULL;
|
||
|
|
||
|
pixbuf = make_symbolic_pixbuf_from_resource (path, width, height, scale, error);
|
||
|
if (pixbuf)
|
||
|
{
|
||
|
texture = gdk_texture_new_for_pixbuf (pixbuf);
|
||
|
g_object_unref (pixbuf);
|
||
|
}
|
||
|
|
||
|
return texture;
|
||
|
}
|
||
|
|
||
|
GdkTexture *
|
||
|
gtk_load_symbolic_texture_from_file (GFile *file)
|
||
|
{
|
||
|
GdkPixbuf *pixbuf;
|
||
|
GdkTexture *texture;
|
||
|
GInputStream *stream;
|
||
|
|
||
|
stream = G_INPUT_STREAM (g_file_read (file, NULL, NULL));
|
||
|
if (stream == NULL)
|
||
|
return NULL;
|
||
|
|
||
|
pixbuf = gdk_pixbuf_new_from_stream (stream, NULL, NULL);
|
||
|
g_object_unref (stream);
|
||
|
if (pixbuf == NULL)
|
||
|
return NULL;
|
||
|
|
||
|
texture = gdk_texture_new_for_pixbuf (pixbuf);
|
||
|
g_object_unref (pixbuf);
|
||
|
|
||
|
return texture;
|
||
|
}
|
||
|
|
||
|
GdkTexture *
|
||
|
gdk_texture_new_from_file_symbolic (GFile *file,
|
||
|
int width,
|
||
|
int height,
|
||
|
double scale,
|
||
|
GError **error)
|
||
|
{
|
||
|
GdkPixbuf *pixbuf;
|
||
|
GdkTexture *texture;
|
||
|
|
||
|
pixbuf = make_symbolic_pixbuf_from_file (file, width, height, scale, error);
|
||
|
texture = gdk_texture_new_for_pixbuf (pixbuf);
|
||
|
g_object_unref (pixbuf);
|
||
|
|
||
|
return texture;
|
||
|
}
|
||
|
|
||
|
/* }}} */
|
||
|
/* {{{ Scaled paintable API */
|
||
|
|
||
|
typedef struct {
|
||
|
int scale_factor;
|
||
|
} LoaderData;
|
||
|
|
||
|
static void
|
||
|
on_loader_size_prepared (GdkPixbufLoader *loader,
|
||
|
int width,
|
||
|
int height,
|
||
|
gpointer user_data)
|
||
|
{
|
||
|
LoaderData *loader_data = user_data;
|
||
|
GdkPixbufFormat *format;
|
||
|
|
||
|
/* Let the regular icon helper code path handle non-scalable images */
|
||
|
format = gdk_pixbuf_loader_get_format (loader);
|
||
|
if (!gdk_pixbuf_format_is_scalable (format))
|
||
|
{
|
||
|
loader_data->scale_factor = 1;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
gdk_pixbuf_loader_set_size (loader,
|
||
|
width * loader_data->scale_factor,
|
||
|
height * loader_data->scale_factor);
|
||
|
}
|
||
|
|
||
|
static GdkPaintable *
|
||
|
gdk_paintable_new_from_bytes_scaled (GBytes *bytes,
|
||
|
int scale_factor)
|
||
|
{
|
||
|
LoaderData loader_data;
|
||
|
GdkTexture *texture;
|
||
|
GdkPaintable *paintable;
|
||
|
|
||
|
loader_data.scale_factor = scale_factor;
|
||
|
|
||
|
if (gdk_texture_can_load (bytes))
|
||
|
{
|
||
|
texture = gdk_texture_new_from_bytes (bytes, NULL);
|
||
|
if (texture == NULL)
|
||
|
return NULL;
|
||
|
|
||
|
/* We know these formats can't be scaled */
|
||
|
paintable = GDK_PAINTABLE (texture);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
GdkPixbufLoader *loader;
|
||
|
gboolean success;
|
||
|
|
||
|
loader = gdk_pixbuf_loader_new ();
|
||
|
g_signal_connect (loader, "size-prepared",
|
||
|
G_CALLBACK (on_loader_size_prepared), &loader_data);
|
||
|
|
||
|
success = gdk_pixbuf_loader_write_bytes (loader, bytes, NULL);
|
||
|
/* close even when writing failed */
|
||
|
success &= gdk_pixbuf_loader_close (loader, NULL);
|
||
|
|
||
|
if (!success)
|
||
|
return NULL;
|
||
|
|
||
|
texture = gdk_texture_new_for_pixbuf (gdk_pixbuf_loader_get_pixbuf (loader));
|
||
|
g_object_unref (loader);
|
||
|
|
||
|
if (loader_data.scale_factor != 1)
|
||
|
paintable = gtk_scaler_new (GDK_PAINTABLE (texture), loader_data.scale_factor);
|
||
|
else
|
||
|
paintable = g_object_ref (GDK_PAINTABLE (texture));
|
||
|
|
||
|
g_object_unref (texture);
|
||
|
}
|
||
|
|
||
|
return paintable;
|
||
|
}
|
||
|
|
||
|
GdkPaintable *
|
||
|
gdk_paintable_new_from_path_scaled (const char *path,
|
||
|
int scale_factor)
|
||
|
{
|
||
|
char *contents;
|
||
|
gsize length;
|
||
|
GBytes *bytes;
|
||
|
GdkPaintable *paintable;
|
||
|
|
||
|
if (!g_file_get_contents (path, &contents, &length, NULL))
|
||
|
return NULL;
|
||
|
|
||
|
bytes = g_bytes_new_take (contents, length);
|
||
|
|
||
|
paintable = gdk_paintable_new_from_bytes_scaled (bytes, scale_factor);
|
||
|
|
||
|
g_bytes_unref (bytes);
|
||
|
|
||
|
return paintable;
|
||
|
}
|
||
|
|
||
|
GdkPaintable *
|
||
|
gdk_paintable_new_from_resource_scaled (const char *path,
|
||
|
int scale_factor)
|
||
|
{
|
||
|
GBytes *bytes;
|
||
|
GdkPaintable *paintable;
|
||
|
|
||
|
bytes = g_resources_lookup_data (path, G_RESOURCE_LOOKUP_FLAGS_NONE, NULL);
|
||
|
if (!bytes)
|
||
|
return NULL;
|
||
|
|
||
|
paintable = gdk_paintable_new_from_bytes_scaled (bytes, scale_factor);
|
||
|
g_bytes_unref (bytes);
|
||
|
|
||
|
return paintable;
|
||
|
}
|
||
|
|
||
|
GdkPaintable *
|
||
|
gdk_paintable_new_from_file_scaled (GFile *file,
|
||
|
int scale_factor)
|
||
|
{
|
||
|
GBytes *bytes;
|
||
|
GdkPaintable *paintable;
|
||
|
|
||
|
bytes = g_file_load_bytes (file, NULL, NULL, NULL);
|
||
|
if (!bytes)
|
||
|
return NULL;
|
||
|
|
||
|
paintable = gdk_paintable_new_from_bytes_scaled (bytes, scale_factor);
|
||
|
|
||
|
g_bytes_unref (bytes);
|
||
|
|
||
|
return paintable;
|
||
|
}
|
||
|
|
||
|
/* }}} */
|
||
|
|
||
|
/* vim:set foldmethod=marker expandtab: */
|