add cairo

1 files changed, 479 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/src/cairo-path.c b/libs/cairo-1.16.0/src/cairo-path.c
new file mode 100644
index 0000000..566e86f
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-path.c
@@ -0,0 +1,479 @@
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2005 Red Hat, Inc.
+ * Copyright © 2006 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.
+ *
+ * Contributor(s):
+ *	Carl D. Worth <cworth@redhat.com>
+ */
+
+#include "cairoint.h"
+
+#include "cairo-private.h"
+#include "cairo-backend-private.h"
+#include "cairo-error-private.h"
+#include "cairo-path-private.h"
+#include "cairo-path-fixed-private.h"
+
+/**
+ * SECTION:cairo-paths
+ * @Title: Paths
+ * @Short_Description: Creating paths and manipulating path data
+ *
+ * Paths are the most basic drawing tools and are primarily used to implicitly
+ * generate simple masks.
+ **/
+
+static const cairo_path_t _cairo_path_nil = { CAIRO_STATUS_NO_MEMORY, NULL, 0 };
+
+/* Closure for path interpretation. */
+typedef struct cairo_path_count {
+    int count;
+} cpc_t;
+
+static cairo_status_t
+_cpc_move_to (void *closure,
+	      const cairo_point_t *point)
+{
+    cpc_t *cpc = closure;
+
+    cpc->count += 2;
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cpc_line_to (void *closure,
+	      const cairo_point_t *point)
+{
+    cpc_t *cpc = closure;
+
+    cpc->count += 2;
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cpc_curve_to (void		*closure,
+	       const cairo_point_t	*p1,
+	       const cairo_point_t	*p2,
+	       const cairo_point_t	*p3)
+{
+    cpc_t *cpc = closure;
+
+    cpc->count += 4;
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cpc_close_path (void *closure)
+{
+    cpc_t *cpc = closure;
+
+    cpc->count += 1;
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static int
+_cairo_path_count (cairo_path_t		*path,
+		   cairo_path_fixed_t	*path_fixed,
+		   double		 tolerance,
+		   cairo_bool_t		 flatten)
+{
+    cairo_status_t status;
+    cpc_t cpc;
+
+    cpc.count = 0;
+
+    if (flatten) {
+	status = _cairo_path_fixed_interpret_flat (path_fixed,
+						   _cpc_move_to,
+						   _cpc_line_to,
+						   _cpc_close_path,
+						   &cpc,
+						   tolerance);
+    } else {
+	status = _cairo_path_fixed_interpret (path_fixed,
+					      _cpc_move_to,
+					      _cpc_line_to,
+					      _cpc_curve_to,
+					      _cpc_close_path,
+					      &cpc);
+    }
+
+    if (unlikely (status))
+	return -1;
+
+    return cpc.count;
+}
+
+/* Closure for path interpretation. */
+typedef struct cairo_path_populate {
+    cairo_path_data_t *data;
+    cairo_t *cr;
+} cpp_t;
+
+static cairo_status_t
+_cpp_move_to (void *closure,
+	      const cairo_point_t *point)
+{
+    cpp_t *cpp = closure;
+    cairo_path_data_t *data = cpp->data;
+    double x, y;
+
+    x = _cairo_fixed_to_double (point->x);
+    y = _cairo_fixed_to_double (point->y);
+
+    _cairo_backend_to_user (cpp->cr, &x, &y);
+
+    data->header.type = CAIRO_PATH_MOVE_TO;
+    data->header.length = 2;
+
+    /* We index from 1 to leave room for data->header */
+    data[1].point.x = x;
+    data[1].point.y = y;
+
+    cpp->data += data->header.length;
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cpp_line_to (void *closure,
+	      const cairo_point_t *point)
+{
+    cpp_t *cpp = closure;
+    cairo_path_data_t *data = cpp->data;
+    double x, y;
+
+    x = _cairo_fixed_to_double (point->x);
+    y = _cairo_fixed_to_double (point->y);
+
+    _cairo_backend_to_user (cpp->cr, &x, &y);
+
+    data->header.type = CAIRO_PATH_LINE_TO;
+    data->header.length = 2;
+
+    /* We index from 1 to leave room for data->header */
+    data[1].point.x = x;
+    data[1].point.y = y;
+
+    cpp->data += data->header.length;
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cpp_curve_to (void			*closure,
+	       const cairo_point_t	*p1,
+	       const cairo_point_t	*p2,
+	       const cairo_point_t	*p3)
+{
+    cpp_t *cpp = closure;
+    cairo_path_data_t *data = cpp->data;
+    double x1, y1;
+    double x2, y2;
+    double x3, y3;
+
+    x1 = _cairo_fixed_to_double (p1->x);
+    y1 = _cairo_fixed_to_double (p1->y);
+    _cairo_backend_to_user (cpp->cr, &x1, &y1);
+
+    x2 = _cairo_fixed_to_double (p2->x);
+    y2 = _cairo_fixed_to_double (p2->y);
+    _cairo_backend_to_user (cpp->cr, &x2, &y2);
+
+    x3 = _cairo_fixed_to_double (p3->x);
+    y3 = _cairo_fixed_to_double (p3->y);
+    _cairo_backend_to_user (cpp->cr, &x3, &y3);
+
+    data->header.type = CAIRO_PATH_CURVE_TO;
+    data->header.length = 4;
+
+    /* We index from 1 to leave room for data->header */
+    data[1].point.x = x1;
+    data[1].point.y = y1;
+
+    data[2].point.x = x2;
+    data[2].point.y = y2;
+
+    data[3].point.x = x3;
+    data[3].point.y = y3;
+
+    cpp->data += data->header.length;
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cpp_close_path (void *closure)
+{
+    cpp_t *cpp = closure;
+    cairo_path_data_t *data = cpp->data;
+
+    data->header.type = CAIRO_PATH_CLOSE_PATH;
+    data->header.length = 1;
+
+    cpp->data += data->header.length;
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cairo_path_populate (cairo_path_t		*path,
+		      cairo_path_fixed_t	*path_fixed,
+		      cairo_t			*cr,
+		      cairo_bool_t		 flatten)
+{
+    cairo_status_t status;
+    cpp_t cpp;
+
+    cpp.data = path->data;
+    cpp.cr = cr;
+
+    if (flatten) {
+	status = _cairo_path_fixed_interpret_flat (path_fixed,
+						   _cpp_move_to,
+						   _cpp_line_to,
+						   _cpp_close_path,
+						   &cpp,
+						   cairo_get_tolerance (cr));
+    } else {
+	status = _cairo_path_fixed_interpret (path_fixed,
+					  _cpp_move_to,
+					  _cpp_line_to,
+					  _cpp_curve_to,
+					  _cpp_close_path,
+					  &cpp);
+    }
+
+    if (unlikely (status))
+	return status;
+
+    /* Sanity check the count */
+    assert (cpp.data - path->data == path->num_data);
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+cairo_path_t *
+_cairo_path_create_in_error (cairo_status_t status)
+{
+    cairo_path_t *path;
+
+    /* special case NO_MEMORY so as to avoid allocations */
+    if (status == CAIRO_STATUS_NO_MEMORY)
+	return (cairo_path_t*) &_cairo_path_nil;
+
+    path = _cairo_malloc (sizeof (cairo_path_t));
+    if (unlikely (path == NULL)) {
+	_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
+	return (cairo_path_t*) &_cairo_path_nil;
+    }
+
+    path->num_data = 0;
+    path->data = NULL;
+    path->status = status;
+
+    return path;
+}
+
+static cairo_path_t *
+_cairo_path_create_internal (cairo_path_fixed_t *path_fixed,
+			     cairo_t		*cr,
+			     cairo_bool_t	 flatten)
+{
+    cairo_path_t *path;
+
+    path = _cairo_malloc (sizeof (cairo_path_t));
+    if (unlikely (path == NULL)) {
+	_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
+	return (cairo_path_t*) &_cairo_path_nil;
+    }
+
+    path->num_data = _cairo_path_count (path, path_fixed,
+					cairo_get_tolerance (cr),
+					flatten);
+    if (path->num_data < 0) {
+	free (path);
+	return (cairo_path_t*) &_cairo_path_nil;
+    }
+
+    if (path->num_data) {
+	path->data = _cairo_malloc_ab (path->num_data,
+				       sizeof (cairo_path_data_t));
+	if (unlikely (path->data == NULL)) {
+	    free (path);
+	    _cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
+	    return (cairo_path_t*) &_cairo_path_nil;
+	}
+
+	path->status = _cairo_path_populate (path, path_fixed, cr, flatten);
+    } else {
+	path->data = NULL;
+	path->status = CAIRO_STATUS_SUCCESS;
+    }
+
+    return path;
+}
+
+/**
+ * cairo_path_destroy:
+ * @path: a path previously returned by either cairo_copy_path() or
+ * cairo_copy_path_flat().
+ *
+ * Immediately releases all memory associated with @path. After a call
+ * to cairo_path_destroy() the @path pointer is no longer valid and
+ * should not be used further.
+ *
+ * Note: cairo_path_destroy() should only be called with a
+ * pointer to a #cairo_path_t returned by a cairo function. Any path
+ * that is created manually (ie. outside of cairo) should be destroyed
+ * manually as well.
+ *
+ * Since: 1.0
+ **/
+void
+cairo_path_destroy (cairo_path_t *path)
+{
+    if (path == NULL || path == &_cairo_path_nil)
+	return;
+
+    free (path->data);
+
+    free (path);
+}
+slim_hidden_def (cairo_path_destroy);
+
+/**
+ * _cairo_path_create:
+ * @path: a fixed-point, device-space path to be converted and copied
+ * @cr: the current graphics context
+ *
+ * Creates a user-space #cairo_path_t copy of the given device-space
+ * @path. The @cr parameter provides the inverse CTM for the
+ * conversion.
+ *
+ * Return value: the new copy of the path. If there is insufficient
+ * memory a pointer to a special static nil #cairo_path_t will be
+ * returned instead with status==%CAIRO_STATUS_NO_MEMORY and
+ * data==%NULL.
+ **/
+cairo_path_t *
+_cairo_path_create (cairo_path_fixed_t	*path,
+		    cairo_t		*cr)
+{
+    return _cairo_path_create_internal (path, cr, FALSE);
+}
+
+/**
+ * _cairo_path_create_flat:
+ * @path: a fixed-point, device-space path to be flattened, converted and copied
+ * @cr: the current graphics context
+ *
+ * Creates a flattened, user-space #cairo_path_t copy of the given
+ * device-space @path. The @cr parameter provide the inverse CTM
+ * for the conversion, as well as the tolerance value to control the
+ * accuracy of the flattening.
+ *
+ * Return value: the flattened copy of the path. If there is insufficient
+ * memory a pointer to a special static nil #cairo_path_t will be
+ * returned instead with status==%CAIRO_STATUS_NO_MEMORY and
+ * data==%NULL.
+ **/
+cairo_path_t *
+_cairo_path_create_flat (cairo_path_fixed_t *path,
+			 cairo_t	    *cr)
+{
+    return _cairo_path_create_internal (path, cr, TRUE);
+}
+
+/**
+ * _cairo_path_append_to_context:
+ * @path: the path data to be appended
+ * @cr: a cairo context
+ *
+ * Append @path to the current path within @cr.
+ *
+ * Return value: %CAIRO_STATUS_INVALID_PATH_DATA if the data in @path
+ * is invalid, and %CAIRO_STATUS_SUCCESS otherwise.
+ **/
+cairo_status_t
+_cairo_path_append_to_context (const cairo_path_t	*path,
+			       cairo_t			*cr)
+{
+    const cairo_path_data_t *p, *end;
+
+    end = &path->data[path->num_data];
+    for (p = &path->data[0]; p < end; p += p->header.length) {
+	switch (p->header.type) {
+	case CAIRO_PATH_MOVE_TO:
+	    if (unlikely (p->header.length < 2))
+		return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
+
+	    cairo_move_to (cr, p[1].point.x, p[1].point.y);
+	    break;
+
+	case CAIRO_PATH_LINE_TO:
+	    if (unlikely (p->header.length < 2))
+		return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
+
+	    cairo_line_to (cr, p[1].point.x, p[1].point.y);
+	    break;
+
+	case CAIRO_PATH_CURVE_TO:
+	    if (unlikely (p->header.length < 4))
+		return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
+
+	    cairo_curve_to (cr,
+			    p[1].point.x, p[1].point.y,
+			    p[2].point.x, p[2].point.y,
+			    p[3].point.x, p[3].point.y);
+	    break;
+
+	case CAIRO_PATH_CLOSE_PATH:
+	    if (unlikely (p->header.length < 1))
+		return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
+
+	    cairo_close_path (cr);
+	    break;
+
+	default:
+	    return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
+	}
+
+	if (unlikely (cr->status))
+	    return cr->status;
+    }
+
+    return CAIRO_STATUS_SUCCESS;
+}