1 files changed, 63 insertions, 0 deletions
diff --git a/intern/gawain/src/primitive.c b/intern/gawain/src/primitive.c
new file mode 100644
index 00000000000..da32932c1e5
--- /dev/null
+++ b/intern/gawain/src/primitive.c
@@ -0,0 +1,63 @@
+
+// Gawain geometric primitives
+//
+// This code is part of the Gawain library, with modifications
+// specific to integration with Blender.
+//
+// Copyright 2017 Mike Erwin
+//
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of
+// the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+#include "primitive.h"
+#include "primitive_private.h"
+
+PrimitiveClass prim_class_of_type(PrimitiveType prim_type)
+	{
+	static const PrimitiveClass classes[] =
+		{
+		[PRIM_POINTS] = PRIM_CLASS_POINT,
+		[PRIM_LINES] = PRIM_CLASS_LINE,
+		[PRIM_LINE_STRIP] = PRIM_CLASS_LINE,
+		[PRIM_LINE_LOOP] = PRIM_CLASS_LINE,
+		[PRIM_TRIANGLES] = PRIM_CLASS_SURFACE,
+		[PRIM_TRIANGLE_STRIP] = PRIM_CLASS_SURFACE,
+		[PRIM_TRIANGLE_FAN] = PRIM_CLASS_SURFACE,
+
+		[PRIM_LINE_STRIP_ADJACENCY] = PRIM_CLASS_LINE,
+
+		[PRIM_NONE] = PRIM_CLASS_NONE
+		};
+
+	return classes[prim_type];
+	}
+
+bool prim_type_belongs_to_class(PrimitiveType prim_type, PrimitiveClass prim_class)
+	{
+	if (prim_class == PRIM_CLASS_NONE && prim_type == PRIM_NONE)
+		return true;
+
+	return prim_class & prim_class_of_type(prim_type);
+	}
+
+GLenum convert_prim_type_to_gl(PrimitiveType prim_type)
+	{
+#if TRUST_NO_ONE
+	assert(prim_type != PRIM_NONE);
+#endif
+
+	static const GLenum table[] =
+		{
+		[PRIM_POINTS] = GL_POINTS,
+		[PRIM_LINES] = GL_LINES,
+		[PRIM_LINE_STRIP] = GL_LINE_STRIP,
+		[PRIM_LINE_LOOP] = GL_LINE_LOOP,
+		[PRIM_TRIANGLES] = PRIM_CLASS_SURFACE,
+		[PRIM_TRIANGLE_STRIP] = GL_TRIANGLE_STRIP,
+		[PRIM_TRIANGLE_FAN] = GL_TRIANGLE_FAN,
+
+		[PRIM_LINE_STRIP_ADJACENCY] = GL_LINE_STRIP_ADJACENCY,
+		};
+
+	return table[prim_type];
+	}