add cairo

1 files changed, 131 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/src/cairo-base85-stream.c b/libs/cairo-1.16.0/src/cairo-base85-stream.c
new file mode 100644
index 0000000..3202f1e
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-base85-stream.c
@@ -0,0 +1,131 @@
+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2005 Red Hat, Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is Red Hat, Inc.
+ *
+ * Author(s):
+ *	Kristian Høgsberg <krh@redhat.com>
+ */
+
+#include "cairoint.h"
+#include "cairo-error-private.h"
+#include "cairo-output-stream-private.h"
+
+typedef struct _cairo_base85_stream {
+    cairo_output_stream_t base;
+    cairo_output_stream_t *output;
+    unsigned char four_tuple[4];
+    int pending;
+} cairo_base85_stream_t;
+
+static void
+_expand_four_tuple_to_five (unsigned char four_tuple[4],
+			    unsigned char five_tuple[5],
+			    cairo_bool_t *all_zero)
+{
+    uint32_t value;
+    int digit, i;
+
+    value = four_tuple[0] << 24 | four_tuple[1] << 16 | four_tuple[2] << 8 | four_tuple[3];
+    if (all_zero)
+	*all_zero = TRUE;
+    for (i = 0; i < 5; i++) {
+	digit = value % 85;
+	if (digit != 0 && all_zero)
+	    *all_zero = FALSE;
+	five_tuple[4-i] = digit + 33;
+	value = value / 85;
+    }
+}
+
+static cairo_status_t
+_cairo_base85_stream_write (cairo_output_stream_t *base,
+			    const unsigned char	  *data,
+			    unsigned int	   length)
+{
+    cairo_base85_stream_t *stream = (cairo_base85_stream_t *) base;
+    const unsigned char *ptr = data;
+    unsigned char five_tuple[5];
+    cairo_bool_t is_zero;
+
+    while (length) {
+	stream->four_tuple[stream->pending++] = *ptr++;
+	length--;
+	if (stream->pending == 4) {
+	    _expand_four_tuple_to_five (stream->four_tuple, five_tuple, &is_zero);
+	    if (is_zero)
+		_cairo_output_stream_write (stream->output, "z", 1);
+	    else
+		_cairo_output_stream_write (stream->output, five_tuple, 5);
+	    stream->pending = 0;
+	}
+    }
+
+    return _cairo_output_stream_get_status (stream->output);
+}
+
+static cairo_status_t
+_cairo_base85_stream_close (cairo_output_stream_t *base)
+{
+    cairo_base85_stream_t *stream = (cairo_base85_stream_t *) base;
+    unsigned char five_tuple[5];
+
+    if (stream->pending) {
+	memset (stream->four_tuple + stream->pending, 0, 4 - stream->pending);
+	_expand_four_tuple_to_five (stream->four_tuple, five_tuple, NULL);
+	_cairo_output_stream_write (stream->output, five_tuple, stream->pending + 1);
+    }
+
+    return _cairo_output_stream_get_status (stream->output);
+}
+
+cairo_output_stream_t *
+_cairo_base85_stream_create (cairo_output_stream_t *output)
+{
+    cairo_base85_stream_t *stream;
+
+    if (output->status)
+	return _cairo_output_stream_create_in_error (output->status);
+
+    stream = _cairo_malloc (sizeof (cairo_base85_stream_t));
+    if (unlikely (stream == NULL)) {
+	_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
+	return (cairo_output_stream_t *) &_cairo_output_stream_nil;
+    }
+
+    _cairo_output_stream_init (&stream->base,
+			       _cairo_base85_stream_write,
+			       NULL,
+			       _cairo_base85_stream_close);
+    stream->output = output;
+    stream->pending = 0;
+
+    return &stream->base;
+}