diff options
Diffstat (limited to 'gdk-pixbuf/io-gdip-jpeg.c')
| -rw-r--r-- | gdk-pixbuf/io-gdip-jpeg.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/gdk-pixbuf/io-gdip-jpeg.c b/gdk-pixbuf/io-gdip-jpeg.c new file mode 100644 index 0000000..8bd3058 --- /dev/null +++ b/gdk-pixbuf/io-gdip-jpeg.c @@ -0,0 +1,141 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* GdkPixbuf library - Win32 GDI+ Pixbuf Loader
+ *
+ * Copyright (C) 2008 Dominic Lachowicz
+ * Copyright (C) 2008 Alberto Ruiz
+ *
+ * Authors: Dominic Lachowicz <domlachowicz@gmail.com>
+ * Alberto Ruiz <aruiz@gnome.org>
+ *
+ * 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 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 * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#define INITGUID
+#include "io-gdip-utils.h"
+
+DEFINE_GUID(EncoderQuality, 0x1d5be4b5,0xfa4a,0x452d,0x9c,0xdd,0x5d,0xb3,0x51,0x05,0xe7,0xeb);
+
+static gboolean
+gdk_pixbuf__gdip_image_save_JPEG_to_callback (GdkPixbufSaveFunc save_func,
+ gpointer user_data,
+ GdkPixbuf *pixbuf,
+ gchar **keys,
+ gchar **values,
+ GError **error)
+{
+ EncoderParameters encoder_params;
+ LONG quality = 75; /* default; must be between 0 and 100 */
+
+ if (keys && *keys) {
+ gchar **kiter = keys;
+ gchar **viter = values;
+
+ while (*kiter) {
+ if (strcmp (*kiter, "quality") == 0) {
+ char *endptr = NULL;
+ quality = strtol (*viter, &endptr, 10);
+
+ if (endptr == *viter) {
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_BAD_OPTION,
+ _("JPEG quality must be a value between 0 and 100; value '%s' could not be parsed."),
+ *viter);
+
+ return FALSE;
+ }
+
+ if (quality < 0 ||
+ quality > 100) {
+ /* This is a user-visible error;
+ * lets people skip the range-checking
+ * in their app.
+ */
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_BAD_OPTION,
+ _("JPEG quality must be a value between 0 and 100; value '%d' is not allowed."),
+ (int)quality);
+
+ return FALSE;
+ }
+ } else {
+ g_warning ("Unrecognized parameter (%s) passed to JPEG saver.", *kiter);
+ }
+
+ ++kiter;
+ ++viter;
+ }
+ }
+
+ encoder_params.Count = 1;
+ encoder_params.Parameter[0].Guid = EncoderQuality;
+ encoder_params.Parameter[0].Type = EncoderParameterValueTypeLong;
+ encoder_params.Parameter[0].NumberOfValues = 1;
+ encoder_params.Parameter[0].Value = &quality;
+
+ return gdip_save_pixbuf (pixbuf, L"image/jpeg", &encoder_params, save_func, user_data, error);
+}
+
+static gboolean
+gdk_pixbuf__gdip_image_save_JPEG (FILE *f,
+ GdkPixbuf *pixbuf,
+ gchar **keys,
+ gchar **values,
+ GError **error)
+{
+ return gdk_pixbuf__gdip_image_save_JPEG_to_callback (gdip_save_to_file_callback, f, pixbuf, keys, values, error);
+}
+
+#ifndef INCLUDE_gdiplus
+#define MODULE_ENTRY(function) G_MODULE_EXPORT void function
+#else
+#define MODULE_ENTRY(function) void _gdk_pixbuf__gdip_jpeg_ ## function
+#endif
+
+MODULE_ENTRY (fill_vtable) (GdkPixbufModule *module)
+{
+ gdip_fill_vtable (module);
+
+ module->save_to_callback = gdk_pixbuf__gdip_image_save_JPEG_to_callback;
+ module->save = gdk_pixbuf__gdip_image_save_JPEG; /* for gtk < 2.14, you need to implement both. otherwise gdk-pixbuf-queryloaders fails */
+}
+
+MODULE_ENTRY (fill_info) (GdkPixbufFormat *info)
+{
+ static GdkPixbufModulePattern signature[] = {
+ { "\xff\xd8", NULL, 100 }, /* JPEG */
+ { NULL, NULL, 0 }
+ };
+
+ static gchar *mime_types[] = {
+ "image/jpeg",
+ NULL
+ };
+
+ static gchar *extensions[] = {
+ "jpeg",
+ "jpe",
+ "jpg",
+ NULL
+ };
+
+ info->name = "jpeg";
+ info->signature = signature;
+ info->description = _("The JPEG image format");
+ info->mime_types = mime_types;
+ info->extensions = extensions;
+ info->flags = GDK_PIXBUF_FORMAT_WRITABLE | GDK_PIXBUF_FORMAT_THREADSAFE;
+ info->license = "LGPL";
+}
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