perf: new-tessellator: Deferred trapezoid generation (first try)

1 files changed, 71 insertions, 0 deletions

diff --git a/src/cairo-freelist-private.h b/src/cairo-freelist-private.h
new file mode 100644
index 000000000..7a225ff38
--- /dev/null
+++ b/src/cairo-freelist-private.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright © 2006 Joonas Pihlaja
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+#ifndef CAIRO_FREELIST_H
+#define CAIRO_FREELIST_H
+#include <stddef.h>
+
+/* Opaque implementation types. */
+struct _cairo_freelist;
+struct _cairo_freelist_node;
+typedef struct _cairo_freelist cairo_freelist_t;
+typedef struct _cairo_freelist_node cairo_freelist_node_t;
+
+struct _cairo_freelist_node {
+    cairo_freelist_node_t *next;
+};
+
+struct _cairo_freelist {
+    cairo_freelist_node_t *first_free_node;
+    unsigned nodesize;
+};
+
+
+/* Initialise a freelist that will be responsible for allocating
+ * nodes of size nodesize. */
+void
+_cairo_freelist_init (cairo_freelist_t *freelist, unsigned nodesize);
+
+/* Deallocate any nodes in the freelist. */
+void
+_cairo_freelist_fini (cairo_freelist_t *freelist);
+
+/* Allocate a new node from the freelist.  If the freelist contains no
+ * nodes, a new one will be allocated using malloc().  The caller is
+ * responsible for calling _cairo_freelist_free() or free() on the
+ * returned node.  Returns NULL on memory allocation error. */
+void *
+_cairo_freelist_alloc (cairo_freelist_t *freelist);
+
+/* Allocate a new node from the freelist.  If the freelist contains no
+ * nodes, a new one will be allocated using calloc().  The caller is
+ * responsible for calling _cairo_freelist_free() or free() on the
+ * returned node.  Returns NULL on memory allocation error. */
+void *
+_cairo_freelist_calloc (cairo_freelist_t *freelist);
+
+/* Return a node to the freelist. This does not deallocate the memory,
+ * but makes it available for later reuse by
+ * _cairo_freelist_alloc(). */
+void
+_cairo_freelist_free (cairo_freelist_t *freelist, void *node);
+
+#endif /* CAIRO_FREELIST_H */