Convert cairo_mime_surface_t to cairo_raster_source_pattern_t

As discussed, overloading the cairo_surface_t semantics to include
sources (i.e. read-only surfaces) was duplicating the definition of
cairo_pattern_t. So rather than introduce a new surface type with
pattern semantics, start along the thorny road of extensible pattern
types.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 280 insertions, 0 deletions

diff --git a/src/cairo-raster-source-pattern.c b/src/cairo-raster-source-pattern.c
new file mode 100644
index 000000000..40031f790
--- /dev/null
+++ b/src/cairo-raster-source-pattern.c
@@ -0,0 +1,280 @@
+/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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):
+ *	Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairoint.h"
+#include "cairo-error-private.h"
+#include "cairo-pattern-private.h"
+
+cairo_surface_t *
+_cairo_raster_source_pattern_acquire (const cairo_pattern_t *abstract_pattern,
+				      cairo_surface_t *target,
+				      const cairo_rectangle_int_t *extents)
+{
+    cairo_raster_source_pattern_t *pattern =
+	(cairo_raster_source_pattern_t *) abstract_pattern;
+
+    if (pattern->acquire == NULL)
+	return NULL;
+
+    if (extents == NULL)
+	extents = &pattern->extents;
+
+    return pattern->acquire (&pattern->base, pattern->user_data,
+			     target, extents);
+}
+
+void
+_cairo_raster_source_pattern_release (const cairo_pattern_t *abstract_pattern,
+				      cairo_surface_t *surface)
+{
+    cairo_raster_source_pattern_t *pattern =
+	(cairo_raster_source_pattern_t *) abstract_pattern;
+
+    if (pattern->release == NULL)
+	return;
+
+    return pattern->release (&pattern->base, pattern->user_data,
+			     surface);
+}
+
+cairo_status_t
+_cairo_raster_source_pattern_init_copy (cairo_pattern_t *abstract_pattern,
+					const cairo_pattern_t *other)
+{
+    cairo_raster_source_pattern_t *pattern =
+	(cairo_raster_source_pattern_t *) abstract_pattern;
+    cairo_status_t status;
+
+    VG (VALGRIND_MAKE_MEM_UNDEFINED (pattern, sizeof (cairo_raster_source_pattern_t)));
+    memcpy(pattern, other, sizeof (cairo_raster_source_pattern_t));
+
+    status = CAIRO_STATUS_SUCCESS;
+    if (pattern->copy)
+	status = pattern->copy (&pattern->base, pattern->user_data, other);
+
+    return status;
+}
+
+cairo_status_t
+_cairo_raster_source_pattern_snapshot (cairo_pattern_t *abstract_pattern)
+{
+    cairo_raster_source_pattern_t *pattern =
+	(cairo_raster_source_pattern_t *) abstract_pattern;
+
+    if (pattern->snapshot == NULL)
+	return CAIRO_STATUS_SUCCESS;
+
+    return pattern->snapshot (&pattern->base, pattern->user_data);
+}
+
+void
+_cairo_raster_source_pattern_finish (cairo_pattern_t *abstract_pattern)
+{
+    cairo_raster_source_pattern_t *pattern =
+	(cairo_raster_source_pattern_t *) abstract_pattern;
+
+    if (pattern->finish == NULL)
+	return;
+
+    pattern->finish (&pattern->base, pattern->user_data);
+}
+
+cairo_pattern_t *
+cairo_pattern_create_raster_source (void *user_data,
+				    cairo_content_t content,
+				    int width, int height)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    CAIRO_MUTEX_INITIALIZE ();
+
+    if (width < 0 || height < 0)
+	return _cairo_pattern_create_in_error (CAIRO_STATUS_INVALID_SIZE);
+
+    if (! CAIRO_CONTENT_VALID (content))
+	return _cairo_pattern_create_in_error (CAIRO_STATUS_INVALID_CONTENT);
+
+    pattern = calloc (1, sizeof (*pattern));
+    if (unlikely (pattern == NULL))
+	return _cairo_pattern_create_in_error (CAIRO_STATUS_NO_MEMORY);
+
+    _cairo_pattern_init (&pattern->base,
+			 CAIRO_PATTERN_TYPE_RASTER_SOURCE);
+    CAIRO_REFERENCE_COUNT_INIT (&pattern->base.ref_count, 1);
+
+    pattern->content = content;
+
+    pattern->extents.x = 0;
+    pattern->extents.y = 0;
+    pattern->extents.width  = width;
+    pattern->extents.height = height;
+
+    pattern->user_data = user_data;
+
+    return &pattern->base;
+}
+
+void
+cairo_raster_source_pattern_set_callback_data (cairo_pattern_t *abstract_pattern,
+					       void *data)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    pattern->user_data = data;
+}
+
+void *
+cairo_raster_source_pattern_get_callback_data (cairo_pattern_t *abstract_pattern)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return NULL;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    return pattern->user_data;
+}
+
+void
+cairo_raster_source_pattern_set_acquire (cairo_pattern_t *abstract_pattern,
+					 cairo_raster_source_acquire_func_t acquire,
+					 cairo_raster_source_release_func_t release)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    pattern->acquire = acquire;
+    pattern->release = release;
+}
+
+void
+cairo_raster_source_pattern_get_acquire (cairo_pattern_t *abstract_pattern,
+					 cairo_raster_source_acquire_func_t *acquire,
+					 cairo_raster_source_release_func_t *release)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    if (acquire)
+	*acquire = pattern->acquire;
+    if (release)
+	*release = pattern->release;
+}
+
+void
+cairo_raster_source_pattern_set_snapshot (cairo_pattern_t *abstract_pattern,
+					  cairo_raster_source_snapshot_func_t snapshot)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    pattern->snapshot = snapshot;
+}
+
+cairo_raster_source_snapshot_func_t
+cairo_raster_source_pattern_get_snapshot (cairo_pattern_t *abstract_pattern)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return NULL;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    return pattern->snapshot;
+}
+
+void
+cairo_raster_source_pattern_set_copy (cairo_pattern_t *abstract_pattern,
+				      cairo_raster_source_copy_func_t copy)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    pattern->copy = copy;
+}
+
+cairo_raster_source_copy_func_t
+cairo_raster_source_pattern_get_copy (cairo_pattern_t *abstract_pattern)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return NULL;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    return pattern->copy;
+}
+
+void
+cairo_raster_source_pattern_set_finish (cairo_pattern_t *abstract_pattern,
+					cairo_raster_source_finish_func_t finish)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    pattern->finish = finish;
+}
+
+cairo_raster_source_finish_func_t
+cairo_raster_source_pattern_get_finish (cairo_pattern_t *abstract_pattern)
+{
+    cairo_raster_source_pattern_t *pattern;
+
+    if (abstract_pattern->type != CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+	return NULL;
+
+    pattern = (cairo_raster_source_pattern_t *) abstract_pattern;
+    return pattern->finish;
+}